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6e41c7c559
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
5559 lines
139 KiB
C
5559 lines
139 KiB
C
/**********************************************************************
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array.c -
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$Author$
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created at: Fri Aug 6 09:46:12 JST 1993
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
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Copyright (C) 2000 Information-technology Promotion Agency, Japan
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**********************************************************************/
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#include "ruby/ruby.h"
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#include "ruby/util.h"
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#include "ruby/st.h"
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#include "ruby/encoding.h"
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#include "internal.h"
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#include "probes.h"
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#include "id.h"
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#ifndef ARRAY_DEBUG
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# define NDEBUG
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#endif
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#include <assert.h>
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#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))
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VALUE rb_cArray;
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static ID id_cmp, id_div, id_power;
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#define ARY_DEFAULT_SIZE 16
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#define ARY_MAX_SIZE (LONG_MAX / (int)sizeof(VALUE))
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void
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rb_mem_clear(register VALUE *mem, register long size)
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{
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while (size--) {
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*mem++ = Qnil;
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}
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}
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static inline void
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memfill(register VALUE *mem, register long size, register VALUE val)
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{
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while (size--) {
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*mem++ = val;
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}
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}
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# define ARY_SHARED_P(ary) \
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(assert(!FL_TEST((ary), ELTS_SHARED) || !FL_TEST((ary), RARRAY_EMBED_FLAG)), \
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FL_TEST((ary),ELTS_SHARED)!=0)
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# define ARY_EMBED_P(ary) \
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(assert(!FL_TEST((ary), ELTS_SHARED) || !FL_TEST((ary), RARRAY_EMBED_FLAG)), \
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FL_TEST((ary), RARRAY_EMBED_FLAG)!=0)
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#define ARY_HEAP_PTR(a) (assert(!ARY_EMBED_P(a)), RARRAY(a)->as.heap.ptr)
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#define ARY_HEAP_LEN(a) (assert(!ARY_EMBED_P(a)), RARRAY(a)->as.heap.len)
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#define ARY_EMBED_PTR(a) (assert(ARY_EMBED_P(a)), RARRAY(a)->as.ary)
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#define ARY_EMBED_LEN(a) \
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(assert(ARY_EMBED_P(a)), \
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(long)((RBASIC(a)->flags >> RARRAY_EMBED_LEN_SHIFT) & \
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(RARRAY_EMBED_LEN_MASK >> RARRAY_EMBED_LEN_SHIFT)))
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#define ARY_OWNS_HEAP_P(a) (!FL_TEST((a), ELTS_SHARED|RARRAY_EMBED_FLAG))
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#define FL_SET_EMBED(a) do { \
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assert(!ARY_SHARED_P(a)); \
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assert(!OBJ_FROZEN(a)); \
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FL_SET((a), RARRAY_EMBED_FLAG); \
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} while (0)
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#define FL_UNSET_EMBED(ary) FL_UNSET((ary), RARRAY_EMBED_FLAG|RARRAY_EMBED_LEN_MASK)
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#define FL_SET_SHARED(ary) do { \
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assert(!ARY_EMBED_P(ary)); \
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FL_SET((ary), ELTS_SHARED); \
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} while (0)
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#define FL_UNSET_SHARED(ary) FL_UNSET((ary), ELTS_SHARED)
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#define ARY_SET_PTR(ary, p) do { \
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assert(!ARY_EMBED_P(ary)); \
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assert(!OBJ_FROZEN(ary)); \
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RARRAY(ary)->as.heap.ptr = (p); \
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} while (0)
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#define ARY_SET_EMBED_LEN(ary, n) do { \
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long tmp_n = (n); \
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assert(ARY_EMBED_P(ary)); \
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assert(!OBJ_FROZEN(ary)); \
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RBASIC(ary)->flags &= ~RARRAY_EMBED_LEN_MASK; \
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RBASIC(ary)->flags |= (tmp_n) << RARRAY_EMBED_LEN_SHIFT; \
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} while (0)
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#define ARY_SET_HEAP_LEN(ary, n) do { \
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assert(!ARY_EMBED_P(ary)); \
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RARRAY(ary)->as.heap.len = (n); \
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} while (0)
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#define ARY_SET_LEN(ary, n) do { \
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if (ARY_EMBED_P(ary)) { \
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ARY_SET_EMBED_LEN((ary), (n)); \
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} \
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else { \
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ARY_SET_HEAP_LEN((ary), (n)); \
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} \
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assert(RARRAY_LEN(ary) == (n)); \
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} while (0)
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#define ARY_INCREASE_PTR(ary, n) do { \
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assert(!ARY_EMBED_P(ary)); \
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assert(!OBJ_FROZEN(ary)); \
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RARRAY(ary)->as.heap.ptr += (n); \
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} while (0)
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#define ARY_INCREASE_LEN(ary, n) do { \
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assert(!OBJ_FROZEN(ary)); \
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if (ARY_EMBED_P(ary)) { \
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ARY_SET_EMBED_LEN((ary), RARRAY_LEN(ary)+(n)); \
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} \
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else { \
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RARRAY(ary)->as.heap.len += (n); \
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} \
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} while (0)
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#define ARY_CAPA(ary) (ARY_EMBED_P(ary) ? RARRAY_EMBED_LEN_MAX : \
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ARY_SHARED_ROOT_P(ary) ? RARRAY_LEN(ary) : RARRAY(ary)->as.heap.aux.capa)
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#define ARY_SET_CAPA(ary, n) do { \
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assert(!ARY_EMBED_P(ary)); \
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assert(!ARY_SHARED_P(ary)); \
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assert(!OBJ_FROZEN(ary)); \
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RARRAY(ary)->as.heap.aux.capa = (n); \
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} while (0)
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#define ARY_SHARED(ary) (assert(ARY_SHARED_P(ary)), RARRAY(ary)->as.heap.aux.shared)
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#define ARY_SET_SHARED(ary, value) do { \
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assert(!ARY_EMBED_P(ary)); \
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assert(ARY_SHARED_P(ary)); \
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assert(ARY_SHARED_ROOT_P(value)); \
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RARRAY(ary)->as.heap.aux.shared = (value); \
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} while (0)
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#define RARRAY_SHARED_ROOT_FLAG FL_USER5
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#define ARY_SHARED_ROOT_P(ary) (FL_TEST((ary), RARRAY_SHARED_ROOT_FLAG))
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#define ARY_SHARED_NUM(ary) \
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(assert(ARY_SHARED_ROOT_P(ary)), RARRAY(ary)->as.heap.aux.capa)
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#define ARY_SET_SHARED_NUM(ary, value) do { \
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assert(ARY_SHARED_ROOT_P(ary)); \
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RARRAY(ary)->as.heap.aux.capa = (value); \
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} while (0)
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#define FL_SET_SHARED_ROOT(ary) do { \
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assert(!ARY_EMBED_P(ary)); \
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FL_SET((ary), RARRAY_SHARED_ROOT_FLAG); \
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} while (0)
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static void
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ary_resize_capa(VALUE ary, long capacity)
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{
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assert(RARRAY_LEN(ary) <= capacity);
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assert(!OBJ_FROZEN(ary));
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assert(!ARY_SHARED_P(ary));
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if (capacity > RARRAY_EMBED_LEN_MAX) {
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if (ARY_EMBED_P(ary)) {
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long len = ARY_EMBED_LEN(ary);
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VALUE *ptr = ALLOC_N(VALUE, (capacity));
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MEMCPY(ptr, ARY_EMBED_PTR(ary), VALUE, len);
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FL_UNSET_EMBED(ary);
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ARY_SET_PTR(ary, ptr);
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ARY_SET_HEAP_LEN(ary, len);
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}
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else {
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REALLOC_N(RARRAY(ary)->as.heap.ptr, VALUE, (capacity));
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}
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ARY_SET_CAPA(ary, (capacity));
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}
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else {
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if (!ARY_EMBED_P(ary)) {
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long len = RARRAY_LEN(ary);
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VALUE *ptr = RARRAY_PTR(ary);
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if (len > capacity) len = capacity;
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MEMCPY(RARRAY(ary)->as.ary, ptr, VALUE, len);
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FL_SET_EMBED(ary);
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ARY_SET_LEN(ary, len);
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xfree(ptr);
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}
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}
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}
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static void
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ary_double_capa(VALUE ary, long min)
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{
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long new_capa = ARY_CAPA(ary) / 2;
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if (new_capa < ARY_DEFAULT_SIZE) {
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new_capa = ARY_DEFAULT_SIZE;
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}
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if (new_capa >= ARY_MAX_SIZE - min) {
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new_capa = (ARY_MAX_SIZE - min) / 2;
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}
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new_capa += min;
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ary_resize_capa(ary, new_capa);
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}
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static void
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rb_ary_decrement_share(VALUE shared)
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{
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if (shared) {
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long num = ARY_SHARED_NUM(shared) - 1;
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if (num == 0) {
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rb_ary_free(shared);
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rb_gc_force_recycle(shared);
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}
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else if (num > 0) {
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ARY_SET_SHARED_NUM(shared, num);
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}
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}
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}
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static void
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rb_ary_unshare(VALUE ary)
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{
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VALUE shared = RARRAY(ary)->as.heap.aux.shared;
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rb_ary_decrement_share(shared);
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FL_UNSET_SHARED(ary);
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}
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static inline void
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rb_ary_unshare_safe(VALUE ary)
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{
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if (ARY_SHARED_P(ary) && !ARY_EMBED_P(ary)) {
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rb_ary_unshare(ary);
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}
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}
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static VALUE
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rb_ary_increment_share(VALUE shared)
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{
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long num = ARY_SHARED_NUM(shared);
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if (num >= 0) {
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ARY_SET_SHARED_NUM(shared, num + 1);
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}
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return shared;
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}
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static void
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rb_ary_set_shared(VALUE ary, VALUE shared)
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{
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rb_ary_increment_share(shared);
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FL_SET_SHARED(ary);
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ARY_SET_SHARED(ary, shared);
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}
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static inline void
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rb_ary_modify_check(VALUE ary)
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{
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rb_check_frozen(ary);
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if (!OBJ_UNTRUSTED(ary) && rb_safe_level() >= 4)
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rb_raise(rb_eSecurityError, "Insecure: can't modify array");
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}
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void
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rb_ary_modify(VALUE ary)
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{
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rb_ary_modify_check(ary);
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if (ARY_SHARED_P(ary)) {
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long len = RARRAY_LEN(ary);
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VALUE shared = ARY_SHARED(ary);
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if (len <= RARRAY_EMBED_LEN_MAX) {
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VALUE *ptr = ARY_HEAP_PTR(ary);
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FL_UNSET_SHARED(ary);
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FL_SET_EMBED(ary);
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MEMCPY(ARY_EMBED_PTR(ary), ptr, VALUE, len);
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rb_ary_decrement_share(shared);
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ARY_SET_EMBED_LEN(ary, len);
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}
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else if (ARY_SHARED_NUM(shared) == 1 && len > (RARRAY_LEN(shared)>>1)) {
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long shift = RARRAY_PTR(ary) - RARRAY_PTR(shared);
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ARY_SET_PTR(ary, RARRAY_PTR(shared));
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ARY_SET_CAPA(ary, RARRAY_LEN(shared));
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MEMMOVE(RARRAY_PTR(ary), RARRAY_PTR(ary)+shift, VALUE, len);
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FL_UNSET_SHARED(ary);
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FL_SET_EMBED(shared);
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rb_ary_decrement_share(shared);
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}
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else {
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VALUE *ptr = ALLOC_N(VALUE, len);
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MEMCPY(ptr, RARRAY_PTR(ary), VALUE, len);
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rb_ary_unshare(ary);
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ARY_SET_CAPA(ary, len);
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ARY_SET_PTR(ary, ptr);
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}
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}
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}
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static void
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ary_ensure_room_for_push(VALUE ary, long add_len)
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{
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long new_len = RARRAY_LEN(ary) + add_len;
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long capa;
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if (ARY_SHARED_P(ary)) {
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if (new_len > RARRAY_EMBED_LEN_MAX) {
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VALUE shared = ARY_SHARED(ary);
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if (ARY_SHARED_NUM(shared) == 1) {
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if (RARRAY_PTR(ary) - RARRAY_PTR(shared) + new_len <= RARRAY_LEN(shared)) {
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rb_ary_modify_check(ary);
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}
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else {
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/* if array is shared, then it is likely it participate in push/shift pattern */
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rb_ary_modify(ary);
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capa = ARY_CAPA(ary);
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if (new_len > capa - (capa >> 6)) {
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ary_double_capa(ary, new_len);
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}
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}
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return;
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}
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}
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}
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rb_ary_modify(ary);
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capa = ARY_CAPA(ary);
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if (new_len > capa) {
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ary_double_capa(ary, new_len);
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}
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}
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/*
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* call-seq:
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* ary.freeze -> ary
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*
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* Calls Object#freeze on +ary+ to prevent any further
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* modification. A RuntimeError will be raised if a modification
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* attempt is made.
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*
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*/
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VALUE
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rb_ary_freeze(VALUE ary)
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{
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return rb_obj_freeze(ary);
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}
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/*
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* call-seq:
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* ary.frozen? -> true or false
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*
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* Return +true+ if this array is frozen (or temporarily frozen
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* while being sorted). See also Object#frozen?
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*/
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static VALUE
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rb_ary_frozen_p(VALUE ary)
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{
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if (OBJ_FROZEN(ary)) return Qtrue;
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return Qfalse;
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}
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/* This can be used to take a snapshot of an array (with
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e.g. rb_ary_replace) and check later whether the array has been
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modified from the snapshot. The snapshot is cheap, though if
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something does modify the array it will pay the cost of copying
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it. If Array#pop or Array#shift has been called, the array will
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be still shared with the snapshot, but the array length will
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differ. */
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VALUE
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rb_ary_shared_with_p(VALUE ary1, VALUE ary2)
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{
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if (!ARY_EMBED_P(ary1) && ARY_SHARED_P(ary1) &&
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!ARY_EMBED_P(ary2) && ARY_SHARED_P(ary2) &&
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RARRAY(ary1)->as.heap.aux.shared == RARRAY(ary2)->as.heap.aux.shared &&
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RARRAY(ary1)->as.heap.len == RARRAY(ary2)->as.heap.len) {
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return Qtrue;
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}
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return Qfalse;
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}
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static VALUE
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ary_alloc(VALUE klass)
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{
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NEWOBJ_OF(ary, struct RArray, klass, T_ARRAY);
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FL_SET_EMBED((VALUE)ary);
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ARY_SET_EMBED_LEN((VALUE)ary, 0);
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return (VALUE)ary;
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}
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static VALUE
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empty_ary_alloc(VALUE klass)
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{
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if (RUBY_DTRACE_ARRAY_CREATE_ENABLED()) {
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RUBY_DTRACE_ARRAY_CREATE(0, rb_sourcefile(), rb_sourceline());
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}
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return ary_alloc(klass);
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}
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static VALUE
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ary_new(VALUE klass, long capa)
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{
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VALUE ary;
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if (capa < 0) {
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rb_raise(rb_eArgError, "negative array size (or size too big)");
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}
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if (capa > ARY_MAX_SIZE) {
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rb_raise(rb_eArgError, "array size too big");
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}
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if (RUBY_DTRACE_ARRAY_CREATE_ENABLED()) {
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RUBY_DTRACE_ARRAY_CREATE(capa, rb_sourcefile(), rb_sourceline());
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}
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ary = ary_alloc(klass);
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if (capa > RARRAY_EMBED_LEN_MAX) {
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FL_UNSET_EMBED(ary);
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ARY_SET_PTR(ary, ALLOC_N(VALUE, capa));
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ARY_SET_CAPA(ary, capa);
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ARY_SET_HEAP_LEN(ary, 0);
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}
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return ary;
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}
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VALUE
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rb_ary_new2(long capa)
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{
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return ary_new(rb_cArray, capa);
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}
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VALUE
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rb_ary_new(void)
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{
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return rb_ary_new2(RARRAY_EMBED_LEN_MAX);
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}
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#include <stdarg.h>
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VALUE
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rb_ary_new3(long n, ...)
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{
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va_list ar;
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VALUE ary;
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long i;
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ary = rb_ary_new2(n);
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va_start(ar, n);
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for (i=0; i<n; i++) {
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RARRAY_PTR(ary)[i] = va_arg(ar, VALUE);
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}
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va_end(ar);
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ARY_SET_LEN(ary, n);
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return ary;
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}
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VALUE
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rb_ary_new4(long n, const VALUE *elts)
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{
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VALUE ary;
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ary = rb_ary_new2(n);
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if (n > 0 && elts) {
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MEMCPY(RARRAY_PTR(ary), elts, VALUE, n);
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ARY_SET_LEN(ary, n);
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}
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return ary;
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}
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VALUE
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rb_ary_tmp_new(long capa)
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{
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return ary_new(0, capa);
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}
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|
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void
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rb_ary_free(VALUE ary)
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{
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if (ARY_OWNS_HEAP_P(ary)) {
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xfree(ARY_HEAP_PTR(ary));
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}
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}
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RUBY_FUNC_EXPORTED size_t
|
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rb_ary_memsize(VALUE ary)
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{
|
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if (ARY_OWNS_HEAP_P(ary)) {
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return RARRAY(ary)->as.heap.aux.capa * sizeof(VALUE);
|
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}
|
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else {
|
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return 0;
|
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}
|
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}
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|
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static inline void
|
|
ary_discard(VALUE ary)
|
|
{
|
|
rb_ary_free(ary);
|
|
RBASIC(ary)->flags |= RARRAY_EMBED_FLAG;
|
|
RBASIC(ary)->flags &= ~RARRAY_EMBED_LEN_MASK;
|
|
}
|
|
|
|
static VALUE
|
|
ary_make_shared(VALUE ary)
|
|
{
|
|
assert(!ARY_EMBED_P(ary));
|
|
if (ARY_SHARED_P(ary)) {
|
|
return ARY_SHARED(ary);
|
|
}
|
|
else if (ARY_SHARED_ROOT_P(ary)) {
|
|
return ary;
|
|
}
|
|
else if (OBJ_FROZEN(ary)) {
|
|
ary_resize_capa(ary, ARY_HEAP_LEN(ary));
|
|
FL_SET_SHARED_ROOT(ary);
|
|
ARY_SET_SHARED_NUM(ary, 1);
|
|
return ary;
|
|
}
|
|
else {
|
|
NEWOBJ_OF(shared, struct RArray, 0, T_ARRAY);
|
|
FL_UNSET_EMBED(shared);
|
|
|
|
ARY_SET_LEN((VALUE)shared, ARY_CAPA(ary));
|
|
ARY_SET_PTR((VALUE)shared, RARRAY_PTR(ary));
|
|
rb_mem_clear(RARRAY_PTR(shared) + RARRAY_LEN(ary), ARY_CAPA(ary) - RARRAY_LEN(ary));
|
|
FL_SET_SHARED_ROOT(shared);
|
|
ARY_SET_SHARED_NUM((VALUE)shared, 1);
|
|
FL_SET_SHARED(ary);
|
|
ARY_SET_SHARED(ary, (VALUE)shared);
|
|
OBJ_FREEZE(shared);
|
|
return (VALUE)shared;
|
|
}
|
|
}
|
|
|
|
|
|
static VALUE
|
|
ary_make_substitution(VALUE ary)
|
|
{
|
|
if (RARRAY_LEN(ary) <= RARRAY_EMBED_LEN_MAX) {
|
|
VALUE subst = rb_ary_new2(RARRAY_LEN(ary));
|
|
MEMCPY(ARY_EMBED_PTR(subst), RARRAY_PTR(ary), VALUE, RARRAY_LEN(ary));
|
|
ARY_SET_EMBED_LEN(subst, RARRAY_LEN(ary));
|
|
return subst;
|
|
}
|
|
else {
|
|
return rb_ary_increment_share(ary_make_shared(ary));
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_assoc_new(VALUE car, VALUE cdr)
|
|
{
|
|
return rb_ary_new3(2, car, cdr);
|
|
}
|
|
|
|
static VALUE
|
|
to_ary(VALUE ary)
|
|
{
|
|
return rb_convert_type(ary, T_ARRAY, "Array", "to_ary");
|
|
}
|
|
|
|
VALUE
|
|
rb_check_array_type(VALUE ary)
|
|
{
|
|
return rb_check_convert_type(ary, T_ARRAY, "Array", "to_ary");
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* Array.try_convert(obj) -> array or nil
|
|
*
|
|
* Tries to convert +obj+ into an array, using +to_ary+ method. Returns the
|
|
* converted array or +nil+ if +obj+ cannot be converted for any reason.
|
|
* This method can be used to check if an argument is an array.
|
|
*
|
|
* Array.try_convert([1]) #=> [1]
|
|
* Array.try_convert("1") #=> nil
|
|
*
|
|
* if tmp = Array.try_convert(arg)
|
|
* # the argument is an array
|
|
* elsif tmp = String.try_convert(arg)
|
|
* # the argument is a string
|
|
* end
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_s_try_convert(VALUE dummy, VALUE ary)
|
|
{
|
|
return rb_check_array_type(ary);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* Array.new(size=0, obj=nil)
|
|
* Array.new(array)
|
|
* Array.new(size) {|index| block }
|
|
*
|
|
* Returns a new array.
|
|
*
|
|
* In the first form, if no arguments are sent, the new array will be empty.
|
|
* When a +size+ and an optional +obj+ are sent, an array is created with
|
|
* +size+ copies of +obj+. Take notice that all elements will reference the
|
|
* same object +obj+.
|
|
*
|
|
* The second form creates a copy of the array passed as a parameter (the
|
|
* array is generated by calling to_ary on the parameter).
|
|
*
|
|
* first_array = ["Matz", "Guido"]
|
|
*
|
|
* second_array = Array.new(first_array) #=> ["Matz", "Guido"]
|
|
*
|
|
* first_array.equal? second_array #=> false
|
|
*
|
|
* In the last form, an array of the given size is created. Each element in
|
|
* this array is created by passing the element's index to the given block
|
|
* and storing the return value.
|
|
*
|
|
* Array.new(3){ |index| index ** 2 }
|
|
* # => [0, 1, 4]
|
|
*
|
|
* == Common gotchas
|
|
*
|
|
* When sending the second parameter, the same object will be used as the
|
|
* value for all the array elements:
|
|
*
|
|
* a = Array.new(2, Hash.new)
|
|
* # => [{}, {}]
|
|
*
|
|
* a[0]['cat'] = 'feline'
|
|
* a # => [{"cat"=>"feline"}, {"cat"=>"feline"}]
|
|
*
|
|
* a[1]['cat'] = 'Felix'
|
|
* a # => [{"cat"=>"Felix"}, {"cat"=>"Felix"}]
|
|
*
|
|
* Since all the Array elements store the same hash, changes to one of them
|
|
* will affect them all.
|
|
*
|
|
* If multiple copies are what you want, you should use the block
|
|
* version which uses the result of that block each time an element
|
|
* of the array needs to be initialized:
|
|
*
|
|
* a = Array.new(2) { Hash.new }
|
|
* a[0]['cat'] = 'feline'
|
|
* a # => [{"cat"=>"feline"}, {}]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_initialize(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
long len;
|
|
VALUE size, val;
|
|
|
|
rb_ary_modify(ary);
|
|
if (argc == 0) {
|
|
if (ARY_OWNS_HEAP_P(ary) && RARRAY_PTR(ary)) {
|
|
xfree(RARRAY_PTR(ary));
|
|
}
|
|
rb_ary_unshare_safe(ary);
|
|
FL_SET_EMBED(ary);
|
|
ARY_SET_EMBED_LEN(ary, 0);
|
|
if (rb_block_given_p()) {
|
|
rb_warning("given block not used");
|
|
}
|
|
return ary;
|
|
}
|
|
rb_scan_args(argc, argv, "02", &size, &val);
|
|
if (argc == 1 && !FIXNUM_P(size)) {
|
|
val = rb_check_array_type(size);
|
|
if (!NIL_P(val)) {
|
|
rb_ary_replace(ary, val);
|
|
return ary;
|
|
}
|
|
}
|
|
|
|
len = NUM2LONG(size);
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative array size");
|
|
}
|
|
if (len > ARY_MAX_SIZE) {
|
|
rb_raise(rb_eArgError, "array size too big");
|
|
}
|
|
rb_ary_modify(ary);
|
|
ary_resize_capa(ary, len);
|
|
if (rb_block_given_p()) {
|
|
long i;
|
|
|
|
if (argc == 2) {
|
|
rb_warn("block supersedes default value argument");
|
|
}
|
|
for (i=0; i<len; i++) {
|
|
rb_ary_store(ary, i, rb_yield(LONG2NUM(i)));
|
|
ARY_SET_LEN(ary, i + 1);
|
|
}
|
|
}
|
|
else {
|
|
memfill(RARRAY_PTR(ary), len, val);
|
|
ARY_SET_LEN(ary, len);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* Returns a new array populated with the given objects.
|
|
*
|
|
* Array.[]( 1, 'a', /^A/ ) # => [1, "a", /^A/]
|
|
* Array[ 1, 'a', /^A/ ] # => [1, "a", /^A/]
|
|
* [ 1, 'a', /^A/ ] # => [1, "a", /^A/]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_s_create(int argc, VALUE *argv, VALUE klass)
|
|
{
|
|
VALUE ary = ary_new(klass, argc);
|
|
if (argc > 0 && argv) {
|
|
MEMCPY(RARRAY_PTR(ary), argv, VALUE, argc);
|
|
ARY_SET_LEN(ary, argc);
|
|
}
|
|
|
|
return ary;
|
|
}
|
|
|
|
void
|
|
rb_ary_store(VALUE ary, long idx, VALUE val)
|
|
{
|
|
if (idx < 0) {
|
|
idx += RARRAY_LEN(ary);
|
|
if (idx < 0) {
|
|
rb_raise(rb_eIndexError, "index %ld too small for array; minimum: %ld",
|
|
idx - RARRAY_LEN(ary), -RARRAY_LEN(ary));
|
|
}
|
|
}
|
|
else if (idx >= ARY_MAX_SIZE) {
|
|
rb_raise(rb_eIndexError, "index %ld too big", idx);
|
|
}
|
|
|
|
rb_ary_modify(ary);
|
|
if (idx >= ARY_CAPA(ary)) {
|
|
ary_double_capa(ary, idx);
|
|
}
|
|
if (idx > RARRAY_LEN(ary)) {
|
|
rb_mem_clear(RARRAY_PTR(ary) + RARRAY_LEN(ary),
|
|
idx-RARRAY_LEN(ary) + 1);
|
|
}
|
|
|
|
if (idx >= RARRAY_LEN(ary)) {
|
|
ARY_SET_LEN(ary, idx + 1);
|
|
}
|
|
RARRAY_PTR(ary)[idx] = val;
|
|
}
|
|
|
|
static VALUE
|
|
ary_make_partial(VALUE ary, VALUE klass, long offset, long len)
|
|
{
|
|
assert(offset >= 0);
|
|
assert(len >= 0);
|
|
assert(offset+len <= RARRAY_LEN(ary));
|
|
|
|
if (len <= RARRAY_EMBED_LEN_MAX) {
|
|
VALUE result = ary_alloc(klass);
|
|
MEMCPY(ARY_EMBED_PTR(result), RARRAY_PTR(ary) + offset, VALUE, len);
|
|
ARY_SET_EMBED_LEN(result, len);
|
|
return result;
|
|
}
|
|
else {
|
|
VALUE shared, result = ary_alloc(klass);
|
|
FL_UNSET_EMBED(result);
|
|
|
|
shared = ary_make_shared(ary);
|
|
ARY_SET_PTR(result, RARRAY_PTR(ary));
|
|
ARY_SET_LEN(result, RARRAY_LEN(ary));
|
|
rb_ary_set_shared(result, shared);
|
|
|
|
ARY_INCREASE_PTR(result, offset);
|
|
ARY_SET_LEN(result, len);
|
|
return result;
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
ary_make_shared_copy(VALUE ary)
|
|
{
|
|
return ary_make_partial(ary, rb_obj_class(ary), 0, RARRAY_LEN(ary));
|
|
}
|
|
|
|
enum ary_take_pos_flags
|
|
{
|
|
ARY_TAKE_FIRST = 0,
|
|
ARY_TAKE_LAST = 1
|
|
};
|
|
|
|
static VALUE
|
|
ary_take_first_or_last(int argc, VALUE *argv, VALUE ary, enum ary_take_pos_flags last)
|
|
{
|
|
VALUE nv;
|
|
long n;
|
|
long offset = 0;
|
|
|
|
rb_scan_args(argc, argv, "1", &nv);
|
|
n = NUM2LONG(nv);
|
|
if (n > RARRAY_LEN(ary)) {
|
|
n = RARRAY_LEN(ary);
|
|
}
|
|
else if (n < 0) {
|
|
rb_raise(rb_eArgError, "negative array size");
|
|
}
|
|
if (last) {
|
|
offset = RARRAY_LEN(ary) - n;
|
|
}
|
|
return ary_make_partial(ary, rb_cArray, offset, n);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary << obj -> ary
|
|
*
|
|
* Append---Pushes the given object on to the end of this array. This
|
|
* expression returns the array itself, so several appends
|
|
* may be chained together.
|
|
*
|
|
* [ 1, 2 ] << "c" << "d" << [ 3, 4 ]
|
|
* #=> [ 1, 2, "c", "d", [ 3, 4 ] ]
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_push(VALUE ary, VALUE item)
|
|
{
|
|
long idx = RARRAY_LEN(ary);
|
|
|
|
ary_ensure_room_for_push(ary, 1);
|
|
RARRAY_PTR(ary)[idx] = item;
|
|
ARY_SET_LEN(ary, idx + 1);
|
|
return ary;
|
|
}
|
|
|
|
static VALUE
|
|
rb_ary_push_1(VALUE ary, VALUE item)
|
|
{
|
|
long idx = RARRAY_LEN(ary);
|
|
|
|
if (idx >= ARY_CAPA(ary)) {
|
|
ary_double_capa(ary, idx);
|
|
}
|
|
RARRAY_PTR(ary)[idx] = item;
|
|
ARY_SET_LEN(ary, idx + 1);
|
|
return ary;
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_cat(VALUE ary, const VALUE *ptr, long len)
|
|
{
|
|
long oldlen = RARRAY_LEN(ary);
|
|
|
|
ary_ensure_room_for_push(ary, len);
|
|
MEMCPY(RARRAY_PTR(ary) + oldlen, ptr, VALUE, len);
|
|
ARY_SET_LEN(ary, oldlen + len);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.push(obj, ... ) -> ary
|
|
*
|
|
* Append --- Pushes the given object(s) on to the end of this array. This
|
|
* expression returns the array itself, so several appends
|
|
* may be chained together. See also Array#pop for the opposite
|
|
* effect.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.push("d", "e", "f")
|
|
* #=> ["a", "b", "c", "d", "e", "f"]
|
|
* [1, 2, 3,].push(4).push(5)
|
|
* #=> [1, 2, 3, 4, 5]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_push_m(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
return rb_ary_cat(ary, argv, argc);
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_pop(VALUE ary)
|
|
{
|
|
long n;
|
|
rb_ary_modify_check(ary);
|
|
if (RARRAY_LEN(ary) == 0) return Qnil;
|
|
if (ARY_OWNS_HEAP_P(ary) &&
|
|
RARRAY_LEN(ary) * 3 < ARY_CAPA(ary) &&
|
|
ARY_CAPA(ary) > ARY_DEFAULT_SIZE)
|
|
{
|
|
ary_resize_capa(ary, RARRAY_LEN(ary) * 2);
|
|
}
|
|
n = RARRAY_LEN(ary)-1;
|
|
ARY_SET_LEN(ary, n);
|
|
return RARRAY_PTR(ary)[n];
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.pop -> obj or nil
|
|
* ary.pop(n) -> new_ary
|
|
*
|
|
* Removes the last element from +self+ and returns it, or
|
|
* +nil+ if the array is empty.
|
|
*
|
|
* If a number +n+ is given, returns an array of the last +n+ elements
|
|
* (or less) just like <code>array.slice!(-n, n)</code> does. See also
|
|
* Array#push for the opposite effect.
|
|
*
|
|
* a = [ "a", "b", "c", "d" ]
|
|
* a.pop #=> "d"
|
|
* a.pop(2) #=> ["b", "c"]
|
|
* a #=> ["a"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_pop_m(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE result;
|
|
|
|
if (argc == 0) {
|
|
return rb_ary_pop(ary);
|
|
}
|
|
|
|
rb_ary_modify_check(ary);
|
|
result = ary_take_first_or_last(argc, argv, ary, ARY_TAKE_LAST);
|
|
ARY_INCREASE_LEN(ary, -RARRAY_LEN(result));
|
|
return result;
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_shift(VALUE ary)
|
|
{
|
|
VALUE top;
|
|
|
|
rb_ary_modify_check(ary);
|
|
if (RARRAY_LEN(ary) == 0) return Qnil;
|
|
top = RARRAY_PTR(ary)[0];
|
|
if (!ARY_SHARED_P(ary)) {
|
|
if (RARRAY_LEN(ary) < ARY_DEFAULT_SIZE) {
|
|
MEMMOVE(RARRAY_PTR(ary), RARRAY_PTR(ary)+1, VALUE, RARRAY_LEN(ary)-1);
|
|
ARY_INCREASE_LEN(ary, -1);
|
|
return top;
|
|
}
|
|
assert(!ARY_EMBED_P(ary)); /* ARY_EMBED_LEN_MAX < ARY_DEFAULT_SIZE */
|
|
|
|
RARRAY_PTR(ary)[0] = Qnil;
|
|
ary_make_shared(ary);
|
|
}
|
|
else if (ARY_SHARED_NUM(ARY_SHARED(ary)) == 1) {
|
|
RARRAY_PTR(ary)[0] = Qnil;
|
|
}
|
|
ARY_INCREASE_PTR(ary, 1); /* shift ptr */
|
|
ARY_INCREASE_LEN(ary, -1);
|
|
|
|
return top;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.shift -> obj or nil
|
|
* ary.shift(n) -> new_ary
|
|
*
|
|
* Removes the first element of +self+ and returns it (shifting all
|
|
* other elements down by one). Returns +nil+ if the array
|
|
* is empty.
|
|
*
|
|
* If a number +n+ is given, returns an array of the first +n+ elements
|
|
* (or less) just like <code>array.slice!(0, n)</code> does. With +ary+
|
|
* containing only the remainder elements, not including what was shifted to
|
|
* +new_ary+. See also Array#unshift for the opposite effect.
|
|
*
|
|
* args = [ "-m", "-q", "filename" ]
|
|
* args.shift #=> "-m"
|
|
* args #=> ["-q", "filename"]
|
|
*
|
|
* args = [ "-m", "-q", "filename" ]
|
|
* args.shift(2) #=> ["-m", "-q"]
|
|
* args #=> ["filename"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_shift_m(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE result;
|
|
long n;
|
|
|
|
if (argc == 0) {
|
|
return rb_ary_shift(ary);
|
|
}
|
|
|
|
rb_ary_modify_check(ary);
|
|
result = ary_take_first_or_last(argc, argv, ary, ARY_TAKE_FIRST);
|
|
n = RARRAY_LEN(result);
|
|
if (ARY_SHARED_P(ary)) {
|
|
if (ARY_SHARED_NUM(ARY_SHARED(ary)) == 1) {
|
|
rb_mem_clear(RARRAY_PTR(ary), n);
|
|
}
|
|
ARY_INCREASE_PTR(ary, n);
|
|
}
|
|
else {
|
|
MEMMOVE(RARRAY_PTR(ary), RARRAY_PTR(ary)+n, VALUE, RARRAY_LEN(ary)-n);
|
|
}
|
|
ARY_INCREASE_LEN(ary, -n);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
ary_ensure_room_for_unshift(VALUE ary, int argc)
|
|
{
|
|
long len = RARRAY_LEN(ary);
|
|
long new_len = len + argc;
|
|
long capa;
|
|
VALUE *head, *sharedp;
|
|
|
|
if (ARY_SHARED_P(ary)) {
|
|
VALUE shared = ARY_SHARED(ary);
|
|
capa = RARRAY_LEN(shared);
|
|
if (ARY_SHARED_NUM(shared) == 1 && capa > new_len) {
|
|
head = RARRAY_PTR(ary);
|
|
sharedp = RARRAY_PTR(shared);
|
|
goto makeroom_if_need;
|
|
}
|
|
}
|
|
|
|
rb_ary_modify(ary);
|
|
capa = ARY_CAPA(ary);
|
|
if (capa - (capa >> 6) <= new_len) {
|
|
ary_double_capa(ary, new_len);
|
|
}
|
|
|
|
/* use shared array for big "queues" */
|
|
if (new_len > ARY_DEFAULT_SIZE * 4) {
|
|
/* make a room for unshifted items */
|
|
capa = ARY_CAPA(ary);
|
|
ary_make_shared(ary);
|
|
|
|
head = sharedp = RARRAY_PTR(ary);
|
|
goto makeroom;
|
|
makeroom_if_need:
|
|
if (head - sharedp < argc) {
|
|
long room;
|
|
makeroom:
|
|
room = capa - new_len;
|
|
room -= room >> 4;
|
|
MEMMOVE(sharedp + argc + room, head, VALUE, len);
|
|
head = sharedp + argc + room;
|
|
}
|
|
ARY_SET_PTR(ary, head - argc);
|
|
}
|
|
else {
|
|
/* sliding items */
|
|
MEMMOVE(RARRAY_PTR(ary) + argc, RARRAY_PTR(ary), VALUE, len);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.unshift(obj, ...) -> ary
|
|
*
|
|
* Prepends objects to the front of +self+, moving other elements upwards.
|
|
* See also Array#shift for the opposite effect.
|
|
*
|
|
* a = [ "b", "c", "d" ]
|
|
* a.unshift("a") #=> ["a", "b", "c", "d"]
|
|
* a.unshift(1, 2) #=> [ 1, 2, "a", "b", "c", "d"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_unshift_m(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
long len = RARRAY_LEN(ary);
|
|
|
|
if (argc == 0) {
|
|
rb_ary_modify_check(ary);
|
|
return ary;
|
|
}
|
|
|
|
ary_ensure_room_for_unshift(ary, argc);
|
|
MEMCPY(RARRAY_PTR(ary), argv, VALUE, argc);
|
|
ARY_SET_LEN(ary, len + argc);
|
|
return ary;
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_unshift(VALUE ary, VALUE item)
|
|
{
|
|
return rb_ary_unshift_m(1,&item,ary);
|
|
}
|
|
|
|
/* faster version - use this if you don't need to treat negative offset */
|
|
static inline VALUE
|
|
rb_ary_elt(VALUE ary, long offset)
|
|
{
|
|
if (RARRAY_LEN(ary) == 0) return Qnil;
|
|
if (offset < 0 || RARRAY_LEN(ary) <= offset) {
|
|
return Qnil;
|
|
}
|
|
return RARRAY_PTR(ary)[offset];
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_entry(VALUE ary, long offset)
|
|
{
|
|
if (offset < 0) {
|
|
offset += RARRAY_LEN(ary);
|
|
}
|
|
return rb_ary_elt(ary, offset);
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_subseq(VALUE ary, long beg, long len)
|
|
{
|
|
VALUE klass;
|
|
|
|
if (beg > RARRAY_LEN(ary)) return Qnil;
|
|
if (beg < 0 || len < 0) return Qnil;
|
|
|
|
if (RARRAY_LEN(ary) < len || RARRAY_LEN(ary) < beg + len) {
|
|
len = RARRAY_LEN(ary) - beg;
|
|
}
|
|
klass = rb_obj_class(ary);
|
|
if (len == 0) return ary_new(klass, 0);
|
|
|
|
return ary_make_partial(ary, klass, beg, len);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary[index] -> obj or nil
|
|
* ary[start, length] -> new_ary or nil
|
|
* ary[range] -> new_ary or nil
|
|
* ary.slice(index) -> obj or nil
|
|
* ary.slice(start, length) -> new_ary or nil
|
|
* ary.slice(range) -> new_ary or nil
|
|
*
|
|
* Element Reference --- Returns the element at +index+, or returns a
|
|
* subarray starting at the +start+ index and continuing for +length+
|
|
* elements, or returns a subarray specified by +range+ of indices.
|
|
*
|
|
* Negative indices count backward from the end of the array (-1 is the last
|
|
* element). For +start+ and +range+ cases the starting index is just before
|
|
* an element. Additionally, an empty array is returned when the starting
|
|
* index for an element range is at the end of the array.
|
|
*
|
|
* Returns +nil+ if the index (or starting index) are out of range.
|
|
*
|
|
* a = [ "a", "b", "c", "d", "e" ]
|
|
* a[2] + a[0] + a[1] #=> "cab"
|
|
* a[6] #=> nil
|
|
* a[1, 2] #=> [ "b", "c" ]
|
|
* a[1..3] #=> [ "b", "c", "d" ]
|
|
* a[4..7] #=> [ "e" ]
|
|
* a[6..10] #=> nil
|
|
* a[-3, 3] #=> [ "c", "d", "e" ]
|
|
* # special cases
|
|
* a[5] #=> nil
|
|
* a[6, 1] #=> nil
|
|
* a[5, 1] #=> []
|
|
* a[5..10] #=> []
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_aref(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE arg;
|
|
long beg, len;
|
|
|
|
if (argc == 2) {
|
|
beg = NUM2LONG(argv[0]);
|
|
len = NUM2LONG(argv[1]);
|
|
if (beg < 0) {
|
|
beg += RARRAY_LEN(ary);
|
|
}
|
|
return rb_ary_subseq(ary, beg, len);
|
|
}
|
|
if (argc != 1) {
|
|
rb_scan_args(argc, argv, "11", NULL, NULL);
|
|
}
|
|
arg = argv[0];
|
|
/* special case - speeding up */
|
|
if (FIXNUM_P(arg)) {
|
|
return rb_ary_entry(ary, FIX2LONG(arg));
|
|
}
|
|
/* check if idx is Range */
|
|
switch (rb_range_beg_len(arg, &beg, &len, RARRAY_LEN(ary), 0)) {
|
|
case Qfalse:
|
|
break;
|
|
case Qnil:
|
|
return Qnil;
|
|
default:
|
|
return rb_ary_subseq(ary, beg, len);
|
|
}
|
|
return rb_ary_entry(ary, NUM2LONG(arg));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.at(index) -> obj or nil
|
|
*
|
|
* Returns the element at +index+. A negative index counts from the end of
|
|
* +self+. Returns +nil+ if the index is out of range. See also
|
|
* Array#[].
|
|
*
|
|
* a = [ "a", "b", "c", "d", "e" ]
|
|
* a.at(0) #=> "a"
|
|
* a.at(-1) #=> "e"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_at(VALUE ary, VALUE pos)
|
|
{
|
|
return rb_ary_entry(ary, NUM2LONG(pos));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.first -> obj or nil
|
|
* ary.first(n) -> new_ary
|
|
*
|
|
* Returns the first element, or the first +n+ elements, of the array.
|
|
* If the array is empty, the first form returns +nil+, and the
|
|
* second form returns an empty array. See also Array#last for
|
|
* the opposite effect.
|
|
*
|
|
* a = [ "q", "r", "s", "t" ]
|
|
* a.first #=> "q"
|
|
* a.first(2) #=> ["q", "r"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_first(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
if (argc == 0) {
|
|
if (RARRAY_LEN(ary) == 0) return Qnil;
|
|
return RARRAY_PTR(ary)[0];
|
|
}
|
|
else {
|
|
return ary_take_first_or_last(argc, argv, ary, ARY_TAKE_FIRST);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.last -> obj or nil
|
|
* ary.last(n) -> new_ary
|
|
*
|
|
* Returns the last element(s) of +self+. If the array is empty,
|
|
* the first form returns +nil+.
|
|
*
|
|
* See also Array#first for the opposite effect.
|
|
*
|
|
* a = [ "w", "x", "y", "z" ]
|
|
* a.last #=> "z"
|
|
* a.last(2) #=> ["y", "z"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_last(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
if (argc == 0) {
|
|
if (RARRAY_LEN(ary) == 0) return Qnil;
|
|
return RARRAY_PTR(ary)[RARRAY_LEN(ary)-1];
|
|
}
|
|
else {
|
|
return ary_take_first_or_last(argc, argv, ary, ARY_TAKE_LAST);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.fetch(index) -> obj
|
|
* ary.fetch(index, default) -> obj
|
|
* ary.fetch(index) { |index| block } -> obj
|
|
*
|
|
* Tries to return the element at position +index+, but throws an IndexError
|
|
* exception if the referenced +index+ lies outside of the array bounds. This
|
|
* error can be prevented by supplying a second argument, which will act as a
|
|
* +default+ value.
|
|
*
|
|
* Alternatively, if a block is given it will only be executed when an
|
|
* invalid +index+ is referenced. Negative values of +index+ count from the
|
|
* end of the array.
|
|
*
|
|
* a = [ 11, 22, 33, 44 ]
|
|
* a.fetch(1) #=> 22
|
|
* a.fetch(-1) #=> 44
|
|
* a.fetch(4, 'cat') #=> "cat"
|
|
* a.fetch(100) { |i| puts "#{i} is out of bounds" }
|
|
* #=> "100 is out of bounds"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_fetch(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE pos, ifnone;
|
|
long block_given;
|
|
long idx;
|
|
|
|
rb_scan_args(argc, argv, "11", &pos, &ifnone);
|
|
block_given = rb_block_given_p();
|
|
if (block_given && argc == 2) {
|
|
rb_warn("block supersedes default value argument");
|
|
}
|
|
idx = NUM2LONG(pos);
|
|
|
|
if (idx < 0) {
|
|
idx += RARRAY_LEN(ary);
|
|
}
|
|
if (idx < 0 || RARRAY_LEN(ary) <= idx) {
|
|
if (block_given) return rb_yield(pos);
|
|
if (argc == 1) {
|
|
rb_raise(rb_eIndexError, "index %ld outside of array bounds: %ld...%ld",
|
|
idx - (idx < 0 ? RARRAY_LEN(ary) : 0), -RARRAY_LEN(ary), RARRAY_LEN(ary));
|
|
}
|
|
return ifnone;
|
|
}
|
|
return RARRAY_PTR(ary)[idx];
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.find_index(obj) -> int or nil
|
|
* ary.find_index { |item| block } -> int or nil
|
|
* ary.find_index -> Enumerator
|
|
* ary.index(obj) -> int or nil
|
|
* ary.index { |item| block } -> int or nil
|
|
* ary.index -> Enumerator
|
|
*
|
|
* Returns the _index_ of the first object in +ary+ such that the object is
|
|
* <code>==</code> to +obj+.
|
|
*
|
|
* If a block is given instead of an argument, returns the _index_ of the
|
|
* first object for which the block returns +true+. Returns +nil+ if no
|
|
* match is found.
|
|
*
|
|
* See also Array#rindex.
|
|
*
|
|
* An Enumerator is returned if neither a block nor argument is given.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.index("b") #=> 1
|
|
* a.index("z") #=> nil
|
|
* a.index { |x| x == "b" } #=> 1
|
|
*
|
|
* This is an alias of Array#find_index.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_index(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE val;
|
|
long i;
|
|
|
|
if (argc == 0) {
|
|
RETURN_ENUMERATOR(ary, 0, 0);
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
if (RTEST(rb_yield(RARRAY_PTR(ary)[i]))) {
|
|
return LONG2NUM(i);
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
rb_scan_args(argc, argv, "1", &val);
|
|
if (rb_block_given_p())
|
|
rb_warn("given block not used");
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
if (rb_equal(RARRAY_PTR(ary)[i], val))
|
|
return LONG2NUM(i);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.rindex(obj) -> int or nil
|
|
* ary.rindex { |item| block } -> int or nil
|
|
* ary.rindex -> Enumerator
|
|
*
|
|
* Returns the _index_ of the last object in +self+ <code>==</code> to +obj+.
|
|
*
|
|
* If a block is given instead of an argument, returns the _index_ of the
|
|
* first object for which the block returns +true+, starting from the last
|
|
* object.
|
|
*
|
|
* Returns +nil+ if no match is found.
|
|
*
|
|
* See also Array#index.
|
|
*
|
|
* If neither block nor argument is given, an Enumerator is returned instead.
|
|
*
|
|
* a = [ "a", "b", "b", "b", "c" ]
|
|
* a.rindex("b") #=> 3
|
|
* a.rindex("z") #=> nil
|
|
* a.rindex { |x| x == "b" } #=> 3
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_rindex(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE val;
|
|
long i = RARRAY_LEN(ary);
|
|
|
|
if (argc == 0) {
|
|
RETURN_ENUMERATOR(ary, 0, 0);
|
|
while (i--) {
|
|
if (RTEST(rb_yield(RARRAY_PTR(ary)[i])))
|
|
return LONG2NUM(i);
|
|
if (i > RARRAY_LEN(ary)) {
|
|
i = RARRAY_LEN(ary);
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
rb_scan_args(argc, argv, "1", &val);
|
|
if (rb_block_given_p())
|
|
rb_warn("given block not used");
|
|
while (i--) {
|
|
if (rb_equal(RARRAY_PTR(ary)[i], val))
|
|
return LONG2NUM(i);
|
|
if (i > RARRAY_LEN(ary)) {
|
|
i = RARRAY_LEN(ary);
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_to_ary(VALUE obj)
|
|
{
|
|
VALUE tmp = rb_check_array_type(obj);
|
|
|
|
if (!NIL_P(tmp)) return tmp;
|
|
return rb_ary_new3(1, obj);
|
|
}
|
|
|
|
static void
|
|
rb_ary_splice(VALUE ary, long beg, long len, VALUE rpl)
|
|
{
|
|
long rlen;
|
|
|
|
if (len < 0) rb_raise(rb_eIndexError, "negative length (%ld)", len);
|
|
if (beg < 0) {
|
|
beg += RARRAY_LEN(ary);
|
|
if (beg < 0) {
|
|
rb_raise(rb_eIndexError, "index %ld too small for array; minimum: %ld",
|
|
beg - RARRAY_LEN(ary), -RARRAY_LEN(ary));
|
|
}
|
|
}
|
|
if (RARRAY_LEN(ary) < len || RARRAY_LEN(ary) < beg + len) {
|
|
len = RARRAY_LEN(ary) - beg;
|
|
}
|
|
|
|
if (rpl == Qundef) {
|
|
rlen = 0;
|
|
}
|
|
else {
|
|
rpl = rb_ary_to_ary(rpl);
|
|
rlen = RARRAY_LEN(rpl);
|
|
}
|
|
if (beg >= RARRAY_LEN(ary)) {
|
|
if (beg > ARY_MAX_SIZE - rlen) {
|
|
rb_raise(rb_eIndexError, "index %ld too big", beg);
|
|
}
|
|
ary_ensure_room_for_push(ary, rlen-len); /* len is 0 or negative */
|
|
len = beg + rlen;
|
|
rb_mem_clear(RARRAY_PTR(ary) + RARRAY_LEN(ary), beg - RARRAY_LEN(ary));
|
|
if (rlen > 0) {
|
|
MEMCPY(RARRAY_PTR(ary) + beg, RARRAY_PTR(rpl), VALUE, rlen);
|
|
}
|
|
ARY_SET_LEN(ary, len);
|
|
}
|
|
else {
|
|
long alen;
|
|
|
|
rb_ary_modify(ary);
|
|
alen = RARRAY_LEN(ary) + rlen - len;
|
|
if (alen >= ARY_CAPA(ary)) {
|
|
ary_double_capa(ary, alen);
|
|
}
|
|
|
|
if (len != rlen) {
|
|
MEMMOVE(RARRAY_PTR(ary) + beg + rlen, RARRAY_PTR(ary) + beg + len,
|
|
VALUE, RARRAY_LEN(ary) - (beg + len));
|
|
ARY_SET_LEN(ary, alen);
|
|
}
|
|
if (rlen > 0) {
|
|
MEMMOVE(RARRAY_PTR(ary) + beg, RARRAY_PTR(rpl), VALUE, rlen);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_ary_set_len(VALUE ary, long len)
|
|
{
|
|
long capa;
|
|
|
|
rb_ary_modify_check(ary);
|
|
if (ARY_SHARED_P(ary)) {
|
|
rb_raise(rb_eRuntimeError, "can't set length of shared ");
|
|
}
|
|
if (len > (capa = (long)ARY_CAPA(ary))) {
|
|
rb_bug("probable buffer overflow: %ld for %ld", len, capa);
|
|
}
|
|
ARY_SET_LEN(ary, len);
|
|
}
|
|
|
|
/*!
|
|
* expands or shrinks \a ary to \a len elements.
|
|
* expanded region will be filled with Qnil.
|
|
* \param ary an array
|
|
* \param len new size
|
|
* \return \a ary
|
|
* \post the size of \a ary is \a len.
|
|
*/
|
|
VALUE
|
|
rb_ary_resize(VALUE ary, long len)
|
|
{
|
|
long olen;
|
|
|
|
rb_ary_modify(ary);
|
|
olen = RARRAY_LEN(ary);
|
|
if (len == olen) return ary;
|
|
if (len > ARY_MAX_SIZE) {
|
|
rb_raise(rb_eIndexError, "index %ld too big", len);
|
|
}
|
|
if (len > olen) {
|
|
if (len >= ARY_CAPA(ary)) {
|
|
ary_double_capa(ary, len);
|
|
}
|
|
rb_mem_clear(RARRAY_PTR(ary) + olen, len - olen);
|
|
ARY_SET_LEN(ary, len);
|
|
}
|
|
else if (ARY_EMBED_P(ary)) {
|
|
ARY_SET_EMBED_LEN(ary, len);
|
|
}
|
|
else if (len <= RARRAY_EMBED_LEN_MAX) {
|
|
VALUE tmp[RARRAY_EMBED_LEN_MAX];
|
|
MEMCPY(tmp, ARY_HEAP_PTR(ary), VALUE, len);
|
|
ary_discard(ary);
|
|
MEMCPY(ARY_EMBED_PTR(ary), tmp, VALUE, len);
|
|
ARY_SET_EMBED_LEN(ary, len);
|
|
}
|
|
else {
|
|
if (olen > len + ARY_DEFAULT_SIZE) {
|
|
REALLOC_N(RARRAY(ary)->as.heap.ptr, VALUE, len);
|
|
ARY_SET_CAPA(ary, len);
|
|
}
|
|
ARY_SET_HEAP_LEN(ary, len);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary[index] = obj -> obj
|
|
* ary[start, length] = obj or other_ary or nil -> obj or other_ary or nil
|
|
* ary[range] = obj or other_ary or nil -> obj or other_ary or nil
|
|
*
|
|
* Element Assignment --- Sets the element at +index+, or replaces a subarray
|
|
* from the +start+ index for +length+ elements, or replaces a subarray
|
|
* specified by the +range+ of indices.
|
|
*
|
|
* If indices are greater than the current capacity of the array, the array
|
|
* grows automatically. Elements are inserted into the array at +start+ if
|
|
* +length+ is zero.
|
|
*
|
|
* Negative indices will count backward from the end of the array. For
|
|
* +start+ and +range+ cases the starting index is just before an element.
|
|
*
|
|
* An IndexError is raised if a negative index points past the beginning of
|
|
* the array.
|
|
*
|
|
* See also Array#push, and Array#unshift.
|
|
*
|
|
* a = Array.new
|
|
* a[4] = "4"; #=> [nil, nil, nil, nil, "4"]
|
|
* a[0, 3] = [ 'a', 'b', 'c' ] #=> ["a", "b", "c", nil, "4"]
|
|
* a[1..2] = [ 1, 2 ] #=> ["a", 1, 2, nil, "4"]
|
|
* a[0, 2] = "?" #=> ["?", 2, nil, "4"]
|
|
* a[0..2] = "A" #=> ["A", "4"]
|
|
* a[-1] = "Z" #=> ["A", "Z"]
|
|
* a[1..-1] = nil #=> ["A", nil]
|
|
* a[1..-1] = [] #=> ["A"]
|
|
* a[0, 0] = [ 1, 2 ] #=> [1, 2, "A"]
|
|
* a[3, 0] = "B" #=> [1, 2, "A", "B"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_aset(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
long offset, beg, len;
|
|
|
|
if (argc == 3) {
|
|
rb_ary_modify_check(ary);
|
|
beg = NUM2LONG(argv[0]);
|
|
len = NUM2LONG(argv[1]);
|
|
rb_ary_splice(ary, beg, len, argv[2]);
|
|
return argv[2];
|
|
}
|
|
rb_check_arity(argc, 2, 2);
|
|
rb_ary_modify_check(ary);
|
|
if (FIXNUM_P(argv[0])) {
|
|
offset = FIX2LONG(argv[0]);
|
|
goto fixnum;
|
|
}
|
|
if (rb_range_beg_len(argv[0], &beg, &len, RARRAY_LEN(ary), 1)) {
|
|
/* check if idx is Range */
|
|
rb_ary_splice(ary, beg, len, argv[1]);
|
|
return argv[1];
|
|
}
|
|
|
|
offset = NUM2LONG(argv[0]);
|
|
fixnum:
|
|
rb_ary_store(ary, offset, argv[1]);
|
|
return argv[1];
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.insert(index, obj...) -> ary
|
|
*
|
|
* Inserts the given values before the element with the given +index+.
|
|
*
|
|
* Negative indices count backwards from the end of the array, where +-1+ is
|
|
* the last element.
|
|
*
|
|
* a = %w{ a b c d }
|
|
* a.insert(2, 99) #=> ["a", "b", 99, "c", "d"]
|
|
* a.insert(-2, 1, 2, 3) #=> ["a", "b", 99, "c", 1, 2, 3, "d"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_insert(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
long pos;
|
|
|
|
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
|
|
rb_ary_modify_check(ary);
|
|
if (argc == 1) return ary;
|
|
pos = NUM2LONG(argv[0]);
|
|
if (pos == -1) {
|
|
pos = RARRAY_LEN(ary);
|
|
}
|
|
if (pos < 0) {
|
|
pos++;
|
|
}
|
|
rb_ary_splice(ary, pos, 0, rb_ary_new4(argc - 1, argv + 1));
|
|
return ary;
|
|
}
|
|
|
|
static VALUE
|
|
rb_ary_length(VALUE ary);
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.each { |item| block } -> ary
|
|
* ary.each -> Enumerator
|
|
*
|
|
* Calls the given block once for each element in +self+, passing that element
|
|
* as a parameter.
|
|
*
|
|
* An Enumerator is returned if no block is given.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.each {|x| print x, " -- " }
|
|
*
|
|
* produces:
|
|
*
|
|
* a -- b -- c --
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_each(VALUE array)
|
|
{
|
|
long i;
|
|
volatile VALUE ary = array;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
rb_yield(RARRAY_PTR(ary)[i]);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.each_index { |index| block } -> ary
|
|
* ary.each_index -> Enumerator
|
|
*
|
|
* Same as Array#each, but passes the +index+ of the element instead of the
|
|
* element itself.
|
|
*
|
|
* An Enumerator is returned if no block is given.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.each_index {|x| print x, " -- " }
|
|
*
|
|
* produces:
|
|
*
|
|
* 0 -- 1 -- 2 --
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_each_index(VALUE ary)
|
|
{
|
|
long i;
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
rb_yield(LONG2NUM(i));
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.reverse_each { |item| block } -> ary
|
|
* ary.reverse_each -> Enumerator
|
|
*
|
|
* Same as Array#each, but traverses +self+ in reverse order.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.reverse_each {|x| print x, " " }
|
|
*
|
|
* produces:
|
|
*
|
|
* c b a
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_reverse_each(VALUE ary)
|
|
{
|
|
long len;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
len = RARRAY_LEN(ary);
|
|
while (len--) {
|
|
rb_yield(RARRAY_PTR(ary)[len]);
|
|
if (RARRAY_LEN(ary) < len) {
|
|
len = RARRAY_LEN(ary);
|
|
}
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.length -> int
|
|
*
|
|
* Returns the number of elements in +self+. May be zero.
|
|
*
|
|
* [ 1, 2, 3, 4, 5 ].length #=> 5
|
|
* [].length #=> 0
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_length(VALUE ary)
|
|
{
|
|
long len = RARRAY_LEN(ary);
|
|
return LONG2NUM(len);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.empty? -> true or false
|
|
*
|
|
* Returns +true+ if +self+ contains no elements.
|
|
*
|
|
* [].empty? #=> true
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_empty_p(VALUE ary)
|
|
{
|
|
if (RARRAY_LEN(ary) == 0)
|
|
return Qtrue;
|
|
return Qfalse;
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_dup(VALUE ary)
|
|
{
|
|
VALUE dup = rb_ary_new2(RARRAY_LEN(ary));
|
|
MEMCPY(RARRAY_PTR(dup), RARRAY_PTR(ary), VALUE, RARRAY_LEN(ary));
|
|
ARY_SET_LEN(dup, RARRAY_LEN(ary));
|
|
return dup;
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_resurrect(VALUE ary)
|
|
{
|
|
return rb_ary_new4(RARRAY_LEN(ary), RARRAY_PTR(ary));
|
|
}
|
|
|
|
extern VALUE rb_output_fs;
|
|
|
|
static void ary_join_1(VALUE obj, VALUE ary, VALUE sep, long i, VALUE result, int *first);
|
|
|
|
static VALUE
|
|
recursive_join(VALUE obj, VALUE argp, int recur)
|
|
{
|
|
VALUE *arg = (VALUE *)argp;
|
|
VALUE ary = arg[0];
|
|
VALUE sep = arg[1];
|
|
VALUE result = arg[2];
|
|
int *first = (int *)arg[3];
|
|
|
|
if (recur) {
|
|
rb_raise(rb_eArgError, "recursive array join");
|
|
}
|
|
else {
|
|
ary_join_1(obj, ary, sep, 0, result, first);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
ary_join_0(VALUE ary, VALUE sep, long max, VALUE result)
|
|
{
|
|
long i;
|
|
VALUE val;
|
|
|
|
if (max > 0) rb_enc_copy(result, RARRAY_PTR(ary)[0]);
|
|
for (i=0; i<max; i++) {
|
|
val = RARRAY_PTR(ary)[i];
|
|
if (i > 0 && !NIL_P(sep))
|
|
rb_str_buf_append(result, sep);
|
|
rb_str_buf_append(result, val);
|
|
if (OBJ_TAINTED(val)) OBJ_TAINT(result);
|
|
if (OBJ_UNTRUSTED(val)) OBJ_TAINT(result);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ary_join_1(VALUE obj, VALUE ary, VALUE sep, long i, VALUE result, int *first)
|
|
{
|
|
VALUE val, tmp;
|
|
|
|
for (; i<RARRAY_LEN(ary); i++) {
|
|
if (i > 0 && !NIL_P(sep))
|
|
rb_str_buf_append(result, sep);
|
|
|
|
val = RARRAY_PTR(ary)[i];
|
|
if (RB_TYPE_P(val, T_STRING)) {
|
|
str_join:
|
|
rb_str_buf_append(result, val);
|
|
*first = FALSE;
|
|
}
|
|
else if (RB_TYPE_P(val, T_ARRAY)) {
|
|
obj = val;
|
|
ary_join:
|
|
if (val == ary) {
|
|
rb_raise(rb_eArgError, "recursive array join");
|
|
}
|
|
else {
|
|
VALUE args[4];
|
|
|
|
args[0] = val;
|
|
args[1] = sep;
|
|
args[2] = result;
|
|
args[3] = (VALUE)first;
|
|
rb_exec_recursive(recursive_join, obj, (VALUE)args);
|
|
}
|
|
}
|
|
else {
|
|
tmp = rb_check_string_type(val);
|
|
if (!NIL_P(tmp)) {
|
|
val = tmp;
|
|
goto str_join;
|
|
}
|
|
tmp = rb_check_convert_type(val, T_ARRAY, "Array", "to_ary");
|
|
if (!NIL_P(tmp)) {
|
|
obj = val;
|
|
val = tmp;
|
|
goto ary_join;
|
|
}
|
|
val = rb_obj_as_string(val);
|
|
if (*first) {
|
|
rb_enc_copy(result, val);
|
|
*first = FALSE;
|
|
}
|
|
goto str_join;
|
|
}
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_join(VALUE ary, VALUE sep)
|
|
{
|
|
long len = 1, i;
|
|
int taint = FALSE;
|
|
int untrust = FALSE;
|
|
VALUE val, tmp, result;
|
|
|
|
if (RARRAY_LEN(ary) == 0) return rb_usascii_str_new(0, 0);
|
|
if (OBJ_TAINTED(ary)) taint = TRUE;
|
|
if (OBJ_UNTRUSTED(ary)) untrust = TRUE;
|
|
|
|
if (!NIL_P(sep)) {
|
|
StringValue(sep);
|
|
len += RSTRING_LEN(sep) * (RARRAY_LEN(ary) - 1);
|
|
}
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
val = RARRAY_PTR(ary)[i];
|
|
tmp = rb_check_string_type(val);
|
|
|
|
if (NIL_P(tmp) || tmp != val) {
|
|
int first;
|
|
result = rb_str_buf_new(len + (RARRAY_LEN(ary)-i)*10);
|
|
rb_enc_associate(result, rb_usascii_encoding());
|
|
if (taint) OBJ_TAINT(result);
|
|
if (untrust) OBJ_UNTRUST(result);
|
|
ary_join_0(ary, sep, i, result);
|
|
first = i == 0;
|
|
ary_join_1(ary, ary, sep, i, result, &first);
|
|
return result;
|
|
}
|
|
|
|
len += RSTRING_LEN(tmp);
|
|
}
|
|
|
|
result = rb_str_buf_new(len);
|
|
if (taint) OBJ_TAINT(result);
|
|
if (untrust) OBJ_UNTRUST(result);
|
|
ary_join_0(ary, sep, RARRAY_LEN(ary), result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.join(separator=$,) -> str
|
|
*
|
|
* Returns a string created by converting each element of the array to
|
|
* a string, separated by the given +separator+.
|
|
* If the +separator+ is +nil+, it uses current $,.
|
|
* If both the +separator+ and $, are nil, it uses empty string.
|
|
*
|
|
* [ "a", "b", "c" ].join #=> "abc"
|
|
* [ "a", "b", "c" ].join("-") #=> "a-b-c"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_join_m(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE sep;
|
|
|
|
rb_scan_args(argc, argv, "01", &sep);
|
|
if (NIL_P(sep)) sep = rb_output_fs;
|
|
|
|
return rb_ary_join(ary, sep);
|
|
}
|
|
|
|
static VALUE
|
|
inspect_ary(VALUE ary, VALUE dummy, int recur)
|
|
{
|
|
int tainted = OBJ_TAINTED(ary);
|
|
int untrust = OBJ_UNTRUSTED(ary);
|
|
long i;
|
|
VALUE s, str;
|
|
|
|
if (recur) return rb_usascii_str_new_cstr("[...]");
|
|
str = rb_str_buf_new2("[");
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
s = rb_inspect(RARRAY_PTR(ary)[i]);
|
|
if (OBJ_TAINTED(s)) tainted = TRUE;
|
|
if (OBJ_UNTRUSTED(s)) untrust = TRUE;
|
|
if (i > 0) rb_str_buf_cat2(str, ", ");
|
|
else rb_enc_copy(str, s);
|
|
rb_str_buf_append(str, s);
|
|
}
|
|
rb_str_buf_cat2(str, "]");
|
|
if (tainted) OBJ_TAINT(str);
|
|
if (untrust) OBJ_UNTRUST(str);
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.inspect -> string
|
|
* ary.to_s -> string
|
|
*
|
|
* Creates a string representation of +self+.
|
|
*
|
|
* [ "a", "b", "c" ].to_s #=> "[\"a\", \"b\", \"c\"]"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_inspect(VALUE ary)
|
|
{
|
|
if (RARRAY_LEN(ary) == 0) return rb_usascii_str_new2("[]");
|
|
return rb_exec_recursive(inspect_ary, ary, 0);
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_to_s(VALUE ary)
|
|
{
|
|
return rb_ary_inspect(ary);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.to_a -> ary
|
|
*
|
|
* Returns +self+.
|
|
*
|
|
* If called on a subclass of Array, converts the receiver to an Array object.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_to_a(VALUE ary)
|
|
{
|
|
if (rb_obj_class(ary) != rb_cArray) {
|
|
VALUE dup = rb_ary_new2(RARRAY_LEN(ary));
|
|
rb_ary_replace(dup, ary);
|
|
return dup;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.to_ary -> ary
|
|
*
|
|
* Returns +self+.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_to_ary_m(VALUE ary)
|
|
{
|
|
return ary;
|
|
}
|
|
|
|
static void
|
|
ary_reverse(VALUE *p1, VALUE *p2)
|
|
{
|
|
while (p1 < p2) {
|
|
VALUE tmp = *p1;
|
|
*p1++ = *p2;
|
|
*p2-- = tmp;
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_reverse(VALUE ary)
|
|
{
|
|
VALUE *p1, *p2;
|
|
|
|
rb_ary_modify(ary);
|
|
if (RARRAY_LEN(ary) > 1) {
|
|
p1 = RARRAY_PTR(ary);
|
|
p2 = p1 + RARRAY_LEN(ary) - 1; /* points last item */
|
|
ary_reverse(p1, p2);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.reverse! -> ary
|
|
*
|
|
* Reverses +self+ in place.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.reverse! #=> ["c", "b", "a"]
|
|
* a #=> ["c", "b", "a"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_reverse_bang(VALUE ary)
|
|
{
|
|
return rb_ary_reverse(ary);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.reverse -> new_ary
|
|
*
|
|
* Returns a new array containing +self+'s elements in reverse order.
|
|
*
|
|
* [ "a", "b", "c" ].reverse #=> ["c", "b", "a"]
|
|
* [ 1 ].reverse #=> [1]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_reverse_m(VALUE ary)
|
|
{
|
|
long len = RARRAY_LEN(ary);
|
|
VALUE dup = rb_ary_new2(len);
|
|
|
|
if (len > 0) {
|
|
VALUE *p1 = RARRAY_PTR(ary);
|
|
VALUE *p2 = RARRAY_PTR(dup) + len - 1;
|
|
do *p2-- = *p1++; while (--len > 0);
|
|
}
|
|
ARY_SET_LEN(dup, RARRAY_LEN(ary));
|
|
return dup;
|
|
}
|
|
|
|
static inline long
|
|
rotate_count(long cnt, long len)
|
|
{
|
|
return (cnt < 0) ? (len - (~cnt % len) - 1) : (cnt % len);
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_rotate(VALUE ary, long cnt)
|
|
{
|
|
rb_ary_modify(ary);
|
|
|
|
if (cnt != 0) {
|
|
VALUE *ptr = RARRAY_PTR(ary);
|
|
long len = RARRAY_LEN(ary);
|
|
|
|
if (len > 0 && (cnt = rotate_count(cnt, len)) > 0) {
|
|
--len;
|
|
if (cnt < len) ary_reverse(ptr + cnt, ptr + len);
|
|
if (--cnt > 0) ary_reverse(ptr, ptr + cnt);
|
|
if (len > 0) ary_reverse(ptr, ptr + len);
|
|
return ary;
|
|
}
|
|
}
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.rotate!(count=1) -> ary
|
|
*
|
|
* Rotates +self+ in place so that the element at +count+ comes first, and
|
|
* returns +self+.
|
|
*
|
|
* If +count+ is negative then it rotates in the opposite direction, starting
|
|
* from the end of the array where +-1+ is the last element.
|
|
*
|
|
* a = [ "a", "b", "c", "d" ]
|
|
* a.rotate! #=> ["b", "c", "d", "a"]
|
|
* a #=> ["b", "c", "d", "a"]
|
|
* a.rotate!(2) #=> ["d", "a", "b", "c"]
|
|
* a.rotate!(-3) #=> ["a", "b", "c", "d"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_rotate_bang(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
long n = 1;
|
|
|
|
switch (argc) {
|
|
case 1: n = NUM2LONG(argv[0]);
|
|
case 0: break;
|
|
default: rb_scan_args(argc, argv, "01", NULL);
|
|
}
|
|
rb_ary_rotate(ary, n);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.rotate(count=1) -> new_ary
|
|
*
|
|
* Returns a new array by rotating +self+ so that the element at +count+ is
|
|
* the first element of the new array.
|
|
*
|
|
* If +count+ is negative then it rotates in the opposite direction, starting
|
|
* from the end of +self+ where +-1+ is the last element.
|
|
*
|
|
* a = [ "a", "b", "c", "d" ]
|
|
* a.rotate #=> ["b", "c", "d", "a"]
|
|
* a #=> ["a", "b", "c", "d"]
|
|
* a.rotate(2) #=> ["c", "d", "a", "b"]
|
|
* a.rotate(-3) #=> ["b", "c", "d", "a"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_rotate_m(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE rotated, *ptr, *ptr2;
|
|
long len, cnt = 1;
|
|
|
|
switch (argc) {
|
|
case 1: cnt = NUM2LONG(argv[0]);
|
|
case 0: break;
|
|
default: rb_scan_args(argc, argv, "01", NULL);
|
|
}
|
|
|
|
len = RARRAY_LEN(ary);
|
|
rotated = rb_ary_new2(len);
|
|
if (len > 0) {
|
|
cnt = rotate_count(cnt, len);
|
|
ptr = RARRAY_PTR(ary);
|
|
ptr2 = RARRAY_PTR(rotated);
|
|
len -= cnt;
|
|
MEMCPY(ptr2, ptr + cnt, VALUE, len);
|
|
MEMCPY(ptr2 + len, ptr, VALUE, cnt);
|
|
}
|
|
ARY_SET_LEN(rotated, RARRAY_LEN(ary));
|
|
return rotated;
|
|
}
|
|
|
|
struct ary_sort_data {
|
|
VALUE ary;
|
|
int opt_methods;
|
|
int opt_inited;
|
|
};
|
|
|
|
enum {
|
|
sort_opt_Fixnum,
|
|
sort_opt_String,
|
|
sort_optimizable_count
|
|
};
|
|
|
|
#define STRING_P(s) (RB_TYPE_P((s), T_STRING) && CLASS_OF(s) == rb_cString)
|
|
|
|
#define SORT_OPTIMIZABLE_BIT(type) (1U << TOKEN_PASTE(sort_opt_,type))
|
|
#define SORT_OPTIMIZABLE(data, type) \
|
|
(((data)->opt_inited & SORT_OPTIMIZABLE_BIT(type)) ? \
|
|
((data)->opt_methods & SORT_OPTIMIZABLE_BIT(type)) : \
|
|
(((data)->opt_inited |= SORT_OPTIMIZABLE_BIT(type)), \
|
|
rb_method_basic_definition_p(TOKEN_PASTE(rb_c,type), id_cmp) && \
|
|
((data)->opt_methods |= SORT_OPTIMIZABLE_BIT(type))))
|
|
|
|
static VALUE
|
|
sort_reentered(VALUE ary)
|
|
{
|
|
if (RBASIC(ary)->klass) {
|
|
rb_raise(rb_eRuntimeError, "sort reentered");
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
static int
|
|
sort_1(const void *ap, const void *bp, void *dummy)
|
|
{
|
|
struct ary_sort_data *data = dummy;
|
|
VALUE retval = sort_reentered(data->ary);
|
|
VALUE a = *(const VALUE *)ap, b = *(const VALUE *)bp;
|
|
int n;
|
|
|
|
retval = rb_yield_values(2, a, b);
|
|
n = rb_cmpint(retval, a, b);
|
|
sort_reentered(data->ary);
|
|
return n;
|
|
}
|
|
|
|
static int
|
|
sort_2(const void *ap, const void *bp, void *dummy)
|
|
{
|
|
struct ary_sort_data *data = dummy;
|
|
VALUE retval = sort_reentered(data->ary);
|
|
VALUE a = *(const VALUE *)ap, b = *(const VALUE *)bp;
|
|
int n;
|
|
|
|
if (FIXNUM_P(a) && FIXNUM_P(b) && SORT_OPTIMIZABLE(data, Fixnum)) {
|
|
if ((long)a > (long)b) return 1;
|
|
if ((long)a < (long)b) return -1;
|
|
return 0;
|
|
}
|
|
if (STRING_P(a) && STRING_P(b) && SORT_OPTIMIZABLE(data, String)) {
|
|
return rb_str_cmp(a, b);
|
|
}
|
|
|
|
retval = rb_funcall(a, id_cmp, 1, b);
|
|
n = rb_cmpint(retval, a, b);
|
|
sort_reentered(data->ary);
|
|
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.sort! -> ary
|
|
* ary.sort! { |a, b| block } -> ary
|
|
*
|
|
* Sorts +self+ in place.
|
|
*
|
|
* Comparisons for the sort will be done using the <code><=></code> operator
|
|
* or using an optional code block.
|
|
*
|
|
* The block must implement a comparison between +a+ and +b+, and return
|
|
* +-1+, when +a+ follows +b+, +0+ when +a+ and +b+ are equivalent, or ++1+
|
|
* if +b+ follows +a+.
|
|
*
|
|
* See also Enumerable#sort_by.
|
|
*
|
|
* a = [ "d", "a", "e", "c", "b" ]
|
|
* a.sort! #=> ["a", "b", "c", "d", "e"]
|
|
* a.sort! { |x,y| y <=> x } #=> ["e", "d", "c", "b", "a"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_sort_bang(VALUE ary)
|
|
{
|
|
rb_ary_modify(ary);
|
|
assert(!ARY_SHARED_P(ary));
|
|
if (RARRAY_LEN(ary) > 1) {
|
|
VALUE tmp = ary_make_substitution(ary); /* only ary refers tmp */
|
|
struct ary_sort_data data;
|
|
long len = RARRAY_LEN(ary);
|
|
|
|
RBASIC(tmp)->klass = 0;
|
|
data.ary = tmp;
|
|
data.opt_methods = 0;
|
|
data.opt_inited = 0;
|
|
ruby_qsort(RARRAY_PTR(tmp), len, sizeof(VALUE),
|
|
rb_block_given_p()?sort_1:sort_2, &data);
|
|
|
|
if (ARY_EMBED_P(tmp)) {
|
|
assert(ARY_EMBED_P(tmp));
|
|
if (ARY_SHARED_P(ary)) { /* ary might be destructively operated in the given block */
|
|
rb_ary_unshare(ary);
|
|
}
|
|
FL_SET_EMBED(ary);
|
|
MEMCPY(RARRAY_PTR(ary), ARY_EMBED_PTR(tmp), VALUE, ARY_EMBED_LEN(tmp));
|
|
ARY_SET_LEN(ary, ARY_EMBED_LEN(tmp));
|
|
}
|
|
else {
|
|
assert(!ARY_EMBED_P(tmp));
|
|
if (ARY_HEAP_PTR(ary) == ARY_HEAP_PTR(tmp)) {
|
|
assert(!ARY_EMBED_P(ary));
|
|
FL_UNSET_SHARED(ary);
|
|
ARY_SET_CAPA(ary, RARRAY_LEN(tmp));
|
|
}
|
|
else {
|
|
assert(!ARY_SHARED_P(tmp));
|
|
if (ARY_EMBED_P(ary)) {
|
|
FL_UNSET_EMBED(ary);
|
|
}
|
|
else if (ARY_SHARED_P(ary)) {
|
|
/* ary might be destructively operated in the given block */
|
|
rb_ary_unshare(ary);
|
|
}
|
|
else {
|
|
xfree(ARY_HEAP_PTR(ary));
|
|
}
|
|
ARY_SET_PTR(ary, RARRAY_PTR(tmp));
|
|
ARY_SET_HEAP_LEN(ary, len);
|
|
ARY_SET_CAPA(ary, RARRAY_LEN(tmp));
|
|
}
|
|
/* tmp was lost ownership for the ptr */
|
|
FL_UNSET(tmp, FL_FREEZE);
|
|
FL_SET_EMBED(tmp);
|
|
ARY_SET_EMBED_LEN(tmp, 0);
|
|
FL_SET(tmp, FL_FREEZE);
|
|
}
|
|
/* tmp will be GC'ed. */
|
|
RBASIC(tmp)->klass = rb_cArray;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.sort -> new_ary
|
|
* ary.sort { |a, b| block } -> new_ary
|
|
*
|
|
* Returns a new array created by sorting +self+.
|
|
*
|
|
* Comparisons for the sort will be done using the <code><=></code> operator
|
|
* or using an optional code block.
|
|
*
|
|
* The block must implement a comparison between +a+ and +b+, and return
|
|
* +-1+, when +a+ follows +b+, +0+ when +a+ and +b+ are equivalent, or ++1+
|
|
* if +b+ follows +a+.
|
|
*
|
|
*
|
|
* See also Enumerable#sort_by.
|
|
*
|
|
* a = [ "d", "a", "e", "c", "b" ]
|
|
* a.sort #=> ["a", "b", "c", "d", "e"]
|
|
* a.sort { |x,y| y <=> x } #=> ["e", "d", "c", "b", "a"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_sort(VALUE ary)
|
|
{
|
|
ary = rb_ary_dup(ary);
|
|
rb_ary_sort_bang(ary);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.bsearch {|x| block } -> elem
|
|
*
|
|
* By using binary search, finds a value from this array which meets
|
|
* the given condition in O(log n) where n is the size of the array.
|
|
*
|
|
* You can use this method in two use cases: a find-minimum mode and
|
|
* a find-any mode. In either case, the elements of the array must be
|
|
* monotone (or sorted) with respect to the block.
|
|
*
|
|
* In find-minimum mode (this is a good choice for typical use case),
|
|
* the block must return true or false, and there must be an index i
|
|
* (0 <= i <= ary.size) so that:
|
|
*
|
|
* - the block returns false for any element whose index is less than
|
|
* i, and
|
|
* - the block returns true for any element whose index is greater
|
|
* than or equal to i.
|
|
*
|
|
* This method returns the i-th element. If i is equal to ary.size,
|
|
* it returns nil.
|
|
*
|
|
* ary = [0, 4, 7, 10, 12]
|
|
* ary.bsearch {|x| x >= 4 } #=> 4
|
|
* ary.bsearch {|x| x >= 6 } #=> 7
|
|
* ary.bsearch {|x| x >= -1 } #=> 0
|
|
* ary.bsearch {|x| x >= 100 } #=> nil
|
|
*
|
|
* In find-any mode (this behaves like libc's bsearch(3)), the block
|
|
* must return a number, and there must be two indices i and j
|
|
* (0 <= i <= j <= ary.size) so that:
|
|
*
|
|
* - the block returns a positive number for ary[k] if 0 <= k < i,
|
|
* - the block returns zero for ary[k] if i <= k < j, and
|
|
* - the block returns a negative number for ary[k] if
|
|
* j <= k < ary.size.
|
|
*
|
|
* Under this condition, this method returns any element whose index
|
|
* is within i...j. If i is equal to j (i.e., there is no element
|
|
* that satisfies the block), this method returns nil.
|
|
*
|
|
* ary = [0, 4, 7, 10, 12]
|
|
* # try to find v such that 4 <= v < 8
|
|
* ary.bsearch {|x| 1 - x / 4 } #=> 4 or 7
|
|
* # try to find v such that 8 <= v < 10
|
|
* ary.bsearch {|x| 4 - x / 2 } #=> nil
|
|
*
|
|
* You must not mix the two modes at a time; the block must always
|
|
* return either true/false, or always return a number. It is
|
|
* undefined which value is actually picked up at each iteration.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_bsearch(VALUE ary)
|
|
{
|
|
long low = 0, high = RARRAY_LEN(ary), mid;
|
|
int smaller = 0, satisfied = 0;
|
|
VALUE v, val;
|
|
|
|
RETURN_ENUMERATOR(ary, 0, 0);
|
|
while (low < high) {
|
|
mid = low + ((high - low) / 2);
|
|
val = rb_ary_entry(ary, mid);
|
|
v = rb_yield(val);
|
|
if (FIXNUM_P(v)) {
|
|
if (FIX2INT(v) == 0) return val;
|
|
smaller = FIX2INT(v) < 0;
|
|
}
|
|
else if (v == Qtrue) {
|
|
satisfied = 1;
|
|
smaller = 1;
|
|
}
|
|
else if (v == Qfalse || v == Qnil) {
|
|
smaller = 0;
|
|
}
|
|
else if (rb_obj_is_kind_of(v, rb_cNumeric)) {
|
|
switch (rb_cmpint(rb_funcall(v, id_cmp, 1, INT2FIX(0)), v, INT2FIX(0))) {
|
|
case 0: return val;
|
|
case 1: smaller = 1; break;
|
|
case -1: smaller = 0;
|
|
}
|
|
}
|
|
else {
|
|
rb_raise(rb_eTypeError, "wrong argument type %s"
|
|
" (must be numeric, true, false or nil)",
|
|
rb_obj_classname(v));
|
|
}
|
|
if (smaller) {
|
|
high = mid;
|
|
}
|
|
else {
|
|
low = mid + 1;
|
|
}
|
|
}
|
|
if (low == RARRAY_LEN(ary)) return Qnil;
|
|
if (!satisfied) return Qnil;
|
|
return rb_ary_entry(ary, low);
|
|
}
|
|
|
|
|
|
static VALUE
|
|
sort_by_i(VALUE i)
|
|
{
|
|
return rb_yield(i);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.sort_by! { |obj| block } -> ary
|
|
* ary.sort_by! -> Enumerator
|
|
*
|
|
* Sorts +self+ in place using a set of keys generated by mapping the
|
|
* values in +self+ through the given block.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_sort_by_bang(VALUE ary)
|
|
{
|
|
VALUE sorted;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
rb_ary_modify(ary);
|
|
sorted = rb_block_call(ary, rb_intern("sort_by"), 0, 0, sort_by_i, 0);
|
|
rb_ary_replace(ary, sorted);
|
|
return ary;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.collect { |item| block } -> new_ary
|
|
* ary.map { |item| block } -> new_ary
|
|
* ary.collect -> Enumerator
|
|
* ary.map -> Enumerator
|
|
*
|
|
* Invokes the given block once for each element of +self+.
|
|
*
|
|
* Creates a new array containing the values returned by the block.
|
|
*
|
|
* See also Enumerable#collect.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* a = [ "a", "b", "c", "d" ]
|
|
* a.map { |x| x + "!" } #=> ["a!", "b!", "c!", "d!"]
|
|
* a #=> ["a", "b", "c", "d"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_collect(VALUE ary)
|
|
{
|
|
long i;
|
|
VALUE collect;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
collect = rb_ary_new2(RARRAY_LEN(ary));
|
|
for (i = 0; i < RARRAY_LEN(ary); i++) {
|
|
rb_ary_push(collect, rb_yield(RARRAY_PTR(ary)[i]));
|
|
}
|
|
return collect;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.collect! {|item| block } -> ary
|
|
* ary.map! {|item| block } -> ary
|
|
* ary.collect! -> Enumerator
|
|
* ary.map! -> Enumerator
|
|
*
|
|
* Invokes the given block once for each element of +self+, replacing the
|
|
* element with the value returned by the block.
|
|
*
|
|
* See also Enumerable#collect.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* a = [ "a", "b", "c", "d" ]
|
|
* a.map! {|x| x + "!" }
|
|
* a #=> [ "a!", "b!", "c!", "d!" ]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_collect_bang(VALUE ary)
|
|
{
|
|
long i;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
rb_ary_modify(ary);
|
|
for (i = 0; i < RARRAY_LEN(ary); i++) {
|
|
rb_ary_store(ary, i, rb_yield(RARRAY_PTR(ary)[i]));
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
VALUE
|
|
rb_get_values_at(VALUE obj, long olen, int argc, VALUE *argv, VALUE (*func) (VALUE, long))
|
|
{
|
|
VALUE result = rb_ary_new2(argc);
|
|
long beg, len, i, j;
|
|
|
|
for (i=0; i<argc; i++) {
|
|
if (FIXNUM_P(argv[i])) {
|
|
rb_ary_push(result, (*func)(obj, FIX2LONG(argv[i])));
|
|
continue;
|
|
}
|
|
/* check if idx is Range */
|
|
if (rb_range_beg_len(argv[i], &beg, &len, olen, 1)) {
|
|
long end = olen < beg+len ? olen : beg+len;
|
|
for (j = beg; j < end; j++) {
|
|
rb_ary_push(result, (*func)(obj, j));
|
|
}
|
|
if (beg + len > j)
|
|
rb_ary_resize(result, RARRAY_LEN(result) + (beg + len) - j);
|
|
continue;
|
|
}
|
|
rb_ary_push(result, (*func)(obj, NUM2LONG(argv[i])));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.values_at(selector, ...) -> new_ary
|
|
*
|
|
* Returns an array containing the elements in +self+ corresponding to the
|
|
* given +selector+(s).
|
|
*
|
|
* The selectors may be either integer indices or ranges.
|
|
*
|
|
* See also Array#select.
|
|
*
|
|
* a = %w{ a b c d e f }
|
|
* a.values_at(1, 3, 5) # => ["b", "d", "f"]
|
|
* a.values_at(1, 3, 5, 7) # => ["b", "d", "f", nil]
|
|
* a.values_at(-1, -2, -2, -7) # => ["f", "e", "e", nil]
|
|
* a.values_at(4..6, 3...6) # => ["e", "f", nil, "d", "e", "f"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_values_at(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
return rb_get_values_at(ary, RARRAY_LEN(ary), argc, argv, rb_ary_entry);
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.select { |item| block } -> new_ary
|
|
* ary.select -> Enumerator
|
|
*
|
|
* Returns a new array containing all elements of +ary+
|
|
* for which the given +block+ returns a true value.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* [1,2,3,4,5].select { |num| num.even? } #=> [2, 4]
|
|
*
|
|
* a = %w{ a b c d e f }
|
|
* a.select { |v| v =~ /[aeiou]/ } #=> ["a", "e"]
|
|
*
|
|
* See also Enumerable#select.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_select(VALUE ary)
|
|
{
|
|
VALUE result;
|
|
long i;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
result = rb_ary_new2(RARRAY_LEN(ary));
|
|
for (i = 0; i < RARRAY_LEN(ary); i++) {
|
|
if (RTEST(rb_yield(RARRAY_PTR(ary)[i]))) {
|
|
rb_ary_push(result, rb_ary_elt(ary, i));
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.select! {|item| block } -> ary or nil
|
|
* ary.select! -> Enumerator
|
|
*
|
|
* Invokes the given block passing in successive elements from +self+,
|
|
* deleting elements for which the block returns a +false+ value.
|
|
*
|
|
* If changes were made, it will return +self+, otherwise it returns +nil+.
|
|
*
|
|
* See also Array#keep_if
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_select_bang(VALUE ary)
|
|
{
|
|
long i1, i2;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
rb_ary_modify(ary);
|
|
for (i1 = i2 = 0; i1 < RARRAY_LEN(ary); i1++) {
|
|
VALUE v = RARRAY_PTR(ary)[i1];
|
|
if (!RTEST(rb_yield(v))) continue;
|
|
if (i1 != i2) {
|
|
rb_ary_store(ary, i2, v);
|
|
}
|
|
i2++;
|
|
}
|
|
|
|
if (RARRAY_LEN(ary) == i2) return Qnil;
|
|
if (i2 < RARRAY_LEN(ary))
|
|
ARY_SET_LEN(ary, i2);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.keep_if { |item| block } -> ary
|
|
* ary.keep_if -> Enumerator
|
|
*
|
|
* Deletes every element of +self+ for which the given block evaluates to
|
|
* +false+.
|
|
*
|
|
* See also Array#select!
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* a = %w{ a b c d e f }
|
|
* a.keep_if { |v| v =~ /[aeiou]/ } #=> ["a", "e"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_keep_if(VALUE ary)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
rb_ary_select_bang(ary);
|
|
return ary;
|
|
}
|
|
|
|
static void
|
|
ary_resize_smaller(VALUE ary, long len)
|
|
{
|
|
rb_ary_modify(ary);
|
|
if (RARRAY_LEN(ary) > len) {
|
|
ARY_SET_LEN(ary, len);
|
|
if (len * 2 < ARY_CAPA(ary) &&
|
|
ARY_CAPA(ary) > ARY_DEFAULT_SIZE) {
|
|
ary_resize_capa(ary, len * 2);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.delete(obj) -> item or nil
|
|
* ary.delete(obj) { block } -> item or result of block
|
|
*
|
|
* Deletes all items from +self+ that are equal to +obj+.
|
|
*
|
|
* Returns the last deleted item, or +nil+ if no matching item is found.
|
|
*
|
|
* If the optional code block is given, the result of the block is returned if
|
|
* the item is not found. (To remove +nil+ elements and get an informative
|
|
* return value, use Array#compact!)
|
|
*
|
|
* a = [ "a", "b", "b", "b", "c" ]
|
|
* a.delete("b") #=> "b"
|
|
* a #=> ["a", "c"]
|
|
* a.delete("z") #=> nil
|
|
* a.delete("z") { "not found" } #=> "not found"
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_delete(VALUE ary, VALUE item)
|
|
{
|
|
VALUE v = item;
|
|
long i1, i2;
|
|
|
|
for (i1 = i2 = 0; i1 < RARRAY_LEN(ary); i1++) {
|
|
VALUE e = RARRAY_PTR(ary)[i1];
|
|
|
|
if (rb_equal(e, item)) {
|
|
v = e;
|
|
continue;
|
|
}
|
|
if (i1 != i2) {
|
|
rb_ary_store(ary, i2, e);
|
|
}
|
|
i2++;
|
|
}
|
|
if (RARRAY_LEN(ary) == i2) {
|
|
if (rb_block_given_p()) {
|
|
return rb_yield(item);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
ary_resize_smaller(ary, i2);
|
|
|
|
return v;
|
|
}
|
|
|
|
void
|
|
rb_ary_delete_same(VALUE ary, VALUE item)
|
|
{
|
|
long i1, i2;
|
|
|
|
for (i1 = i2 = 0; i1 < RARRAY_LEN(ary); i1++) {
|
|
VALUE e = RARRAY_PTR(ary)[i1];
|
|
|
|
if (e == item) {
|
|
continue;
|
|
}
|
|
if (i1 != i2) {
|
|
rb_ary_store(ary, i2, e);
|
|
}
|
|
i2++;
|
|
}
|
|
if (RARRAY_LEN(ary) == i2) {
|
|
return;
|
|
}
|
|
|
|
ary_resize_smaller(ary, i2);
|
|
}
|
|
|
|
VALUE
|
|
rb_ary_delete_at(VALUE ary, long pos)
|
|
{
|
|
long len = RARRAY_LEN(ary);
|
|
VALUE del;
|
|
|
|
if (pos >= len) return Qnil;
|
|
if (pos < 0) {
|
|
pos += len;
|
|
if (pos < 0) return Qnil;
|
|
}
|
|
|
|
rb_ary_modify(ary);
|
|
del = RARRAY_PTR(ary)[pos];
|
|
MEMMOVE(RARRAY_PTR(ary)+pos, RARRAY_PTR(ary)+pos+1, VALUE,
|
|
RARRAY_LEN(ary)-pos-1);
|
|
ARY_INCREASE_LEN(ary, -1);
|
|
|
|
return del;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.delete_at(index) -> obj or nil
|
|
*
|
|
* Deletes the element at the specified +index+, returning that element, or
|
|
* +nil+ if the +index+ is out of range.
|
|
*
|
|
* See also Array#slice!
|
|
*
|
|
* a = ["ant", "bat", "cat", "dog"]
|
|
* a.delete_at(2) #=> "cat"
|
|
* a #=> ["ant", "bat", "dog"]
|
|
* a.delete_at(99) #=> nil
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_delete_at_m(VALUE ary, VALUE pos)
|
|
{
|
|
return rb_ary_delete_at(ary, NUM2LONG(pos));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.slice!(index) -> obj or nil
|
|
* ary.slice!(start, length) -> new_ary or nil
|
|
* ary.slice!(range) -> new_ary or nil
|
|
*
|
|
* Deletes the element(s) given by an +index+ (optionally up to +length+
|
|
* elements) or by a +range+.
|
|
*
|
|
* Returns the deleted object (or objects), or +nil+ if the +index+ is out of
|
|
* range.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.slice!(1) #=> "b"
|
|
* a #=> ["a", "c"]
|
|
* a.slice!(-1) #=> "c"
|
|
* a #=> ["a"]
|
|
* a.slice!(100) #=> nil
|
|
* a #=> ["a"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_slice_bang(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE arg1, arg2;
|
|
long pos, len, orig_len;
|
|
|
|
rb_ary_modify_check(ary);
|
|
if (argc == 2) {
|
|
pos = NUM2LONG(argv[0]);
|
|
len = NUM2LONG(argv[1]);
|
|
delete_pos_len:
|
|
if (len < 0) return Qnil;
|
|
orig_len = RARRAY_LEN(ary);
|
|
if (pos < 0) {
|
|
pos += orig_len;
|
|
if (pos < 0) return Qnil;
|
|
}
|
|
else if (orig_len < pos) return Qnil;
|
|
if (orig_len < pos + len) {
|
|
len = orig_len - pos;
|
|
}
|
|
if (len == 0) return rb_ary_new2(0);
|
|
arg2 = rb_ary_new4(len, RARRAY_PTR(ary)+pos);
|
|
RBASIC(arg2)->klass = rb_obj_class(ary);
|
|
rb_ary_splice(ary, pos, len, Qundef);
|
|
return arg2;
|
|
}
|
|
|
|
if (argc != 1) {
|
|
/* error report */
|
|
rb_scan_args(argc, argv, "11", NULL, NULL);
|
|
}
|
|
arg1 = argv[0];
|
|
|
|
if (!FIXNUM_P(arg1)) {
|
|
switch (rb_range_beg_len(arg1, &pos, &len, RARRAY_LEN(ary), 0)) {
|
|
case Qtrue:
|
|
/* valid range */
|
|
goto delete_pos_len;
|
|
case Qnil:
|
|
/* invalid range */
|
|
return Qnil;
|
|
default:
|
|
/* not a range */
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rb_ary_delete_at(ary, NUM2LONG(arg1));
|
|
}
|
|
|
|
static VALUE
|
|
ary_reject(VALUE orig, VALUE result)
|
|
{
|
|
long i;
|
|
|
|
for (i = 0; i < RARRAY_LEN(orig); i++) {
|
|
VALUE v = RARRAY_PTR(orig)[i];
|
|
if (!RTEST(rb_yield(v))) {
|
|
rb_ary_push_1(result, v);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static VALUE
|
|
ary_reject_bang(VALUE ary)
|
|
{
|
|
long i;
|
|
VALUE result = Qnil;
|
|
|
|
rb_ary_modify_check(ary);
|
|
for (i = 0; i < RARRAY_LEN(ary); ) {
|
|
VALUE v = RARRAY_PTR(ary)[i];
|
|
if (RTEST(rb_yield(v))) {
|
|
rb_ary_delete_at(ary, i);
|
|
result = ary;
|
|
}
|
|
else {
|
|
i++;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.reject! { |item| block } -> ary or nil
|
|
* ary.reject! -> Enumerator
|
|
*
|
|
* Equivalent to Array#delete_if, deleting elements from +self+ for which the
|
|
* block evaluates to +true+, but returns +nil+ if no changes were made.
|
|
*
|
|
* The array is changed instantly every time the block is called, not after
|
|
* the iteration is over.
|
|
*
|
|
* See also Enumerable#reject and Array#delete_if.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_reject_bang(VALUE ary)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
return ary_reject_bang(ary);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.reject {|item| block } -> new_ary
|
|
* ary.reject -> Enumerator
|
|
*
|
|
* Returns a new array containing the items in +self+ for which the given
|
|
* block is not +true+.
|
|
*
|
|
* See also Array#delete_if
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_reject(VALUE ary)
|
|
{
|
|
VALUE rejected_ary;
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
rejected_ary = rb_ary_new();
|
|
ary_reject(ary, rejected_ary);
|
|
return rejected_ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.delete_if { |item| block } -> ary
|
|
* ary.delete_if -> Enumerator
|
|
*
|
|
* Deletes every element of +self+ for which block evaluates to +true+.
|
|
*
|
|
* The array is changed instantly every time the block is called, not after
|
|
* the iteration is over.
|
|
*
|
|
* See also Array#reject!
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.delete_if {|x| x >= "b" } #=> ["a"]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_delete_if(VALUE ary)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(ary, 0, 0, rb_ary_length);
|
|
ary_reject_bang(ary);
|
|
return ary;
|
|
}
|
|
|
|
static VALUE
|
|
take_i(VALUE val, VALUE *args, int argc, VALUE *argv)
|
|
{
|
|
if (args[1]-- == 0) rb_iter_break();
|
|
if (argc > 1) val = rb_ary_new4(argc, argv);
|
|
rb_ary_push(args[0], val);
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
take_items(VALUE obj, long n)
|
|
{
|
|
VALUE result = rb_check_array_type(obj);
|
|
VALUE args[2];
|
|
|
|
if (!NIL_P(result)) return rb_ary_subseq(result, 0, n);
|
|
result = rb_ary_new2(n);
|
|
args[0] = result; args[1] = (VALUE)n;
|
|
if (rb_check_block_call(obj, idEach, 0, 0, take_i, (VALUE)args) == Qundef)
|
|
rb_raise(rb_eTypeError, "wrong argument type %"PRIsVALUE" (must respond to :each)",
|
|
rb_obj_class(obj));
|
|
return result;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.zip(arg, ...) -> new_ary
|
|
* ary.zip(arg, ...) { |arr| block } -> nil
|
|
*
|
|
* Converts any arguments to arrays, then merges elements of +self+ with
|
|
* corresponding elements from each argument.
|
|
*
|
|
* This generates a sequence of <code>ary.size</code> _n_-element arrays,
|
|
* where _n_ is one more that the count of arguments.
|
|
*
|
|
* If the size of any argument is less than the size of the initial array,
|
|
* +nil+ values are supplied.
|
|
*
|
|
* If a block is given, it is invoked for each output +array+, otherwise an
|
|
* array of arrays is returned.
|
|
*
|
|
* a = [ 4, 5, 6 ]
|
|
* b = [ 7, 8, 9 ]
|
|
* [1, 2, 3].zip(a, b) #=> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
|
|
* [1, 2].zip(a, b) #=> [[1, 4, 7], [2, 5, 8]]
|
|
* a.zip([1, 2], [8]) #=> [[4, 1, 8], [5, 2, nil], [6, nil, nil]]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_zip(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
int i, j;
|
|
long len;
|
|
VALUE result = Qnil;
|
|
|
|
len = RARRAY_LEN(ary);
|
|
for (i=0; i<argc; i++) {
|
|
argv[i] = take_items(argv[i], len);
|
|
}
|
|
if (!rb_block_given_p()) {
|
|
result = rb_ary_new2(len);
|
|
}
|
|
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
VALUE tmp = rb_ary_new2(argc+1);
|
|
|
|
rb_ary_push(tmp, rb_ary_elt(ary, i));
|
|
for (j=0; j<argc; j++) {
|
|
rb_ary_push(tmp, rb_ary_elt(argv[j], i));
|
|
}
|
|
if (NIL_P(result)) {
|
|
rb_yield(tmp);
|
|
}
|
|
else {
|
|
rb_ary_push(result, tmp);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.transpose -> new_ary
|
|
*
|
|
* Assumes that +self+ is an array of arrays and transposes the rows and
|
|
* columns.
|
|
*
|
|
* a = [[1,2], [3,4], [5,6]]
|
|
* a.transpose #=> [[1, 3, 5], [2, 4, 6]]
|
|
*
|
|
* If the length of the subarrays don't match, an IndexError is raised.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_transpose(VALUE ary)
|
|
{
|
|
long elen = -1, alen, i, j;
|
|
VALUE tmp, result = 0;
|
|
|
|
alen = RARRAY_LEN(ary);
|
|
if (alen == 0) return rb_ary_dup(ary);
|
|
for (i=0; i<alen; i++) {
|
|
tmp = to_ary(rb_ary_elt(ary, i));
|
|
if (elen < 0) { /* first element */
|
|
elen = RARRAY_LEN(tmp);
|
|
result = rb_ary_new2(elen);
|
|
for (j=0; j<elen; j++) {
|
|
rb_ary_store(result, j, rb_ary_new2(alen));
|
|
}
|
|
}
|
|
else if (elen != RARRAY_LEN(tmp)) {
|
|
rb_raise(rb_eIndexError, "element size differs (%ld should be %ld)",
|
|
RARRAY_LEN(tmp), elen);
|
|
}
|
|
for (j=0; j<elen; j++) {
|
|
rb_ary_store(rb_ary_elt(result, j), i, rb_ary_elt(tmp, j));
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.replace(other_ary) -> ary
|
|
*
|
|
* Replaces the contents of +self+ with the contents of +other_ary+,
|
|
* truncating or expanding if necessary.
|
|
*
|
|
* a = [ "a", "b", "c", "d", "e" ]
|
|
* a.replace([ "x", "y", "z" ]) #=> ["x", "y", "z"]
|
|
* a #=> ["x", "y", "z"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_replace(VALUE copy, VALUE orig)
|
|
{
|
|
rb_ary_modify_check(copy);
|
|
orig = to_ary(orig);
|
|
if (copy == orig) return copy;
|
|
|
|
if (RARRAY_LEN(orig) <= RARRAY_EMBED_LEN_MAX) {
|
|
VALUE *ptr;
|
|
VALUE shared = 0;
|
|
|
|
if (ARY_OWNS_HEAP_P(copy)) {
|
|
xfree(RARRAY_PTR(copy));
|
|
}
|
|
else if (ARY_SHARED_P(copy)) {
|
|
shared = ARY_SHARED(copy);
|
|
FL_UNSET_SHARED(copy);
|
|
}
|
|
FL_SET_EMBED(copy);
|
|
ptr = RARRAY_PTR(orig);
|
|
MEMCPY(RARRAY_PTR(copy), ptr, VALUE, RARRAY_LEN(orig));
|
|
if (shared) {
|
|
rb_ary_decrement_share(shared);
|
|
}
|
|
ARY_SET_LEN(copy, RARRAY_LEN(orig));
|
|
}
|
|
else {
|
|
VALUE shared = ary_make_shared(orig);
|
|
if (ARY_OWNS_HEAP_P(copy)) {
|
|
xfree(RARRAY_PTR(copy));
|
|
}
|
|
else {
|
|
rb_ary_unshare_safe(copy);
|
|
}
|
|
FL_UNSET_EMBED(copy);
|
|
ARY_SET_PTR(copy, RARRAY_PTR(orig));
|
|
ARY_SET_LEN(copy, RARRAY_LEN(orig));
|
|
rb_ary_set_shared(copy, shared);
|
|
}
|
|
return copy;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.clear -> ary
|
|
*
|
|
* Removes all elements from +self+.
|
|
*
|
|
* a = [ "a", "b", "c", "d", "e" ]
|
|
* a.clear #=> [ ]
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_clear(VALUE ary)
|
|
{
|
|
rb_ary_modify_check(ary);
|
|
ARY_SET_LEN(ary, 0);
|
|
if (ARY_SHARED_P(ary)) {
|
|
if (!ARY_EMBED_P(ary)) {
|
|
rb_ary_unshare(ary);
|
|
FL_SET_EMBED(ary);
|
|
}
|
|
}
|
|
else if (ARY_DEFAULT_SIZE * 2 < ARY_CAPA(ary)) {
|
|
ary_resize_capa(ary, ARY_DEFAULT_SIZE * 2);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.fill(obj) -> ary
|
|
* ary.fill(obj, start [, length]) -> ary
|
|
* ary.fill(obj, range ) -> ary
|
|
* ary.fill { |index| block } -> ary
|
|
* ary.fill(start [, length] ) { |index| block } -> ary
|
|
* ary.fill(range) { |index| block } -> ary
|
|
*
|
|
* The first three forms set the selected elements of +self+ (which
|
|
* may be the entire array) to +obj+.
|
|
*
|
|
* A +start+ of +nil+ is equivalent to zero.
|
|
*
|
|
* A +length+ of +nil+ is equivalent to the length of the array.
|
|
*
|
|
* The last three forms fill the array with the value of the given block,
|
|
* which is passed the absolute index of each element to be filled.
|
|
*
|
|
* Negative values of +start+ count from the end of the array, where +-1+ is
|
|
* the last element.
|
|
*
|
|
* a = [ "a", "b", "c", "d" ]
|
|
* a.fill("x") #=> ["x", "x", "x", "x"]
|
|
* a.fill("z", 2, 2) #=> ["x", "x", "z", "z"]
|
|
* a.fill("y", 0..1) #=> ["y", "y", "z", "z"]
|
|
* a.fill { |i| i*i } #=> [0, 1, 4, 9]
|
|
* a.fill(-2) { |i| i*i*i } #=> [0, 1, 8, 27]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_fill(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE item, arg1, arg2;
|
|
long beg = 0, end = 0, len = 0;
|
|
VALUE *p, *pend;
|
|
int block_p = FALSE;
|
|
|
|
if (rb_block_given_p()) {
|
|
block_p = TRUE;
|
|
rb_scan_args(argc, argv, "02", &arg1, &arg2);
|
|
argc += 1; /* hackish */
|
|
}
|
|
else {
|
|
rb_scan_args(argc, argv, "12", &item, &arg1, &arg2);
|
|
}
|
|
switch (argc) {
|
|
case 1:
|
|
beg = 0;
|
|
len = RARRAY_LEN(ary);
|
|
break;
|
|
case 2:
|
|
if (rb_range_beg_len(arg1, &beg, &len, RARRAY_LEN(ary), 1)) {
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case 3:
|
|
beg = NIL_P(arg1) ? 0 : NUM2LONG(arg1);
|
|
if (beg < 0) {
|
|
beg = RARRAY_LEN(ary) + beg;
|
|
if (beg < 0) beg = 0;
|
|
}
|
|
len = NIL_P(arg2) ? RARRAY_LEN(ary) - beg : NUM2LONG(arg2);
|
|
break;
|
|
}
|
|
rb_ary_modify(ary);
|
|
if (len < 0) {
|
|
return ary;
|
|
}
|
|
if (beg >= ARY_MAX_SIZE || len > ARY_MAX_SIZE - beg) {
|
|
rb_raise(rb_eArgError, "argument too big");
|
|
}
|
|
end = beg + len;
|
|
if (RARRAY_LEN(ary) < end) {
|
|
if (end >= ARY_CAPA(ary)) {
|
|
ary_resize_capa(ary, end);
|
|
}
|
|
rb_mem_clear(RARRAY_PTR(ary) + RARRAY_LEN(ary), end - RARRAY_LEN(ary));
|
|
ARY_SET_LEN(ary, end);
|
|
}
|
|
|
|
if (block_p) {
|
|
VALUE v;
|
|
long i;
|
|
|
|
for (i=beg; i<end; i++) {
|
|
v = rb_yield(LONG2NUM(i));
|
|
if (i>=RARRAY_LEN(ary)) break;
|
|
RARRAY_PTR(ary)[i] = v;
|
|
}
|
|
}
|
|
else {
|
|
p = RARRAY_PTR(ary) + beg;
|
|
pend = p + len;
|
|
while (p < pend) {
|
|
*p++ = item;
|
|
}
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary + other_ary -> new_ary
|
|
*
|
|
* Concatenation --- Returns a new array built by concatenating the
|
|
* two arrays together to produce a third array.
|
|
*
|
|
* [ 1, 2, 3 ] + [ 4, 5 ] #=> [ 1, 2, 3, 4, 5 ]
|
|
* a = [ "a", "b", "c" ]
|
|
* a + [ "d", "e", "f" ]
|
|
* a #=> [ "a", "b", "c", "d", "e", "f" ]
|
|
*
|
|
* See also Array#concat.
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_plus(VALUE x, VALUE y)
|
|
{
|
|
VALUE z;
|
|
long len;
|
|
|
|
y = to_ary(y);
|
|
len = RARRAY_LEN(x) + RARRAY_LEN(y);
|
|
z = rb_ary_new2(len);
|
|
MEMCPY(RARRAY_PTR(z), RARRAY_PTR(x), VALUE, RARRAY_LEN(x));
|
|
MEMCPY(RARRAY_PTR(z) + RARRAY_LEN(x), RARRAY_PTR(y), VALUE, RARRAY_LEN(y));
|
|
ARY_SET_LEN(z, len);
|
|
return z;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.concat(other_ary) -> ary
|
|
*
|
|
* Appends the elements of +other_ary+ to +self+.
|
|
*
|
|
* [ "a", "b" ].concat( ["c", "d"] ) #=> [ "a", "b", "c", "d" ]
|
|
* a = [ 1, 2, 3 ]
|
|
* a.concat( [ 4, 5 ] )
|
|
* a #=> [ 1, 2, 3, 4, 5 ]
|
|
*
|
|
* See also Array#+.
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_concat(VALUE x, VALUE y)
|
|
{
|
|
rb_ary_modify_check(x);
|
|
y = to_ary(y);
|
|
if (RARRAY_LEN(y) > 0) {
|
|
rb_ary_splice(x, RARRAY_LEN(x), 0, y);
|
|
}
|
|
return x;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary * int -> new_ary
|
|
* ary * str -> new_string
|
|
*
|
|
* Repetition --- With a String argument, equivalent to
|
|
* <code>ary.join(str)</code>.
|
|
*
|
|
* Otherwise, returns a new array built by concatenating the +int+ copies of
|
|
* +self+.
|
|
*
|
|
*
|
|
* [ 1, 2, 3 ] * 3 #=> [ 1, 2, 3, 1, 2, 3, 1, 2, 3 ]
|
|
* [ 1, 2, 3 ] * "," #=> "1,2,3"
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_times(VALUE ary, VALUE times)
|
|
{
|
|
VALUE ary2, tmp, *ptr, *ptr2;
|
|
long t, len;
|
|
|
|
tmp = rb_check_string_type(times);
|
|
if (!NIL_P(tmp)) {
|
|
return rb_ary_join(ary, tmp);
|
|
}
|
|
|
|
len = NUM2LONG(times);
|
|
if (len == 0) {
|
|
ary2 = ary_new(rb_obj_class(ary), 0);
|
|
goto out;
|
|
}
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative argument");
|
|
}
|
|
if (ARY_MAX_SIZE/len < RARRAY_LEN(ary)) {
|
|
rb_raise(rb_eArgError, "argument too big");
|
|
}
|
|
len *= RARRAY_LEN(ary);
|
|
|
|
ary2 = ary_new(rb_obj_class(ary), len);
|
|
ARY_SET_LEN(ary2, len);
|
|
|
|
ptr = RARRAY_PTR(ary);
|
|
ptr2 = RARRAY_PTR(ary2);
|
|
t = RARRAY_LEN(ary);
|
|
if (0 < t) {
|
|
MEMCPY(ptr2, ptr, VALUE, t);
|
|
while (t <= len/2) {
|
|
MEMCPY(ptr2+t, ptr2, VALUE, t);
|
|
t *= 2;
|
|
}
|
|
if (t < len) {
|
|
MEMCPY(ptr2+t, ptr2, VALUE, len-t);
|
|
}
|
|
}
|
|
out:
|
|
OBJ_INFECT(ary2, ary);
|
|
|
|
return ary2;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.assoc(obj) -> new_ary or nil
|
|
*
|
|
* Searches through an array whose elements are also arrays comparing +obj+
|
|
* with the first element of each contained array using <code>obj.==</code>.
|
|
*
|
|
* Returns the first contained array that matches (that is, the first
|
|
* associated array), or +nil+ if no match is found.
|
|
*
|
|
* See also Array#rassoc
|
|
*
|
|
* s1 = [ "colors", "red", "blue", "green" ]
|
|
* s2 = [ "letters", "a", "b", "c" ]
|
|
* s3 = "foo"
|
|
* a = [ s1, s2, s3 ]
|
|
* a.assoc("letters") #=> [ "letters", "a", "b", "c" ]
|
|
* a.assoc("foo") #=> nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_assoc(VALUE ary, VALUE key)
|
|
{
|
|
long i;
|
|
VALUE v;
|
|
|
|
for (i = 0; i < RARRAY_LEN(ary); ++i) {
|
|
v = rb_check_array_type(RARRAY_PTR(ary)[i]);
|
|
if (!NIL_P(v) && RARRAY_LEN(v) > 0 &&
|
|
rb_equal(RARRAY_PTR(v)[0], key))
|
|
return v;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.rassoc(obj) -> new_ary or nil
|
|
*
|
|
* Searches through the array whose elements are also arrays.
|
|
*
|
|
* Compares +obj+ with the second element of each contained array using
|
|
* <code>obj.==</code>.
|
|
*
|
|
* Returns the first contained array that matches +obj+.
|
|
*
|
|
* See also Array#assoc.
|
|
*
|
|
* a = [ [ 1, "one"], [2, "two"], [3, "three"], ["ii", "two"] ]
|
|
* a.rassoc("two") #=> [2, "two"]
|
|
* a.rassoc("four") #=> nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_rassoc(VALUE ary, VALUE value)
|
|
{
|
|
long i;
|
|
VALUE v;
|
|
|
|
for (i = 0; i < RARRAY_LEN(ary); ++i) {
|
|
v = RARRAY_PTR(ary)[i];
|
|
if (RB_TYPE_P(v, T_ARRAY) &&
|
|
RARRAY_LEN(v) > 1 &&
|
|
rb_equal(RARRAY_PTR(v)[1], value))
|
|
return v;
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
recursive_equal(VALUE ary1, VALUE ary2, int recur)
|
|
{
|
|
long i, len1;
|
|
VALUE *p1, *p2;
|
|
|
|
if (recur) return Qtrue; /* Subtle! */
|
|
|
|
p1 = RARRAY_PTR(ary1);
|
|
p2 = RARRAY_PTR(ary2);
|
|
len1 = RARRAY_LEN(ary1);
|
|
|
|
for (i = 0; i < len1; i++) {
|
|
if (*p1 != *p2) {
|
|
if (rb_equal(*p1, *p2)) {
|
|
len1 = RARRAY_LEN(ary1);
|
|
if (len1 != RARRAY_LEN(ary2))
|
|
return Qfalse;
|
|
if (len1 < i)
|
|
return Qtrue;
|
|
p1 = RARRAY_PTR(ary1) + i;
|
|
p2 = RARRAY_PTR(ary2) + i;
|
|
}
|
|
else {
|
|
return Qfalse;
|
|
}
|
|
}
|
|
p1++;
|
|
p2++;
|
|
}
|
|
return Qtrue;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary == other_ary -> bool
|
|
*
|
|
* Equality --- Two arrays are equal if they contain the same number of
|
|
* elements and if each element is equal to (according to Object#==) the
|
|
* corresponding element in +other_ary+.
|
|
*
|
|
* [ "a", "c" ] == [ "a", "c", 7 ] #=> false
|
|
* [ "a", "c", 7 ] == [ "a", "c", 7 ] #=> true
|
|
* [ "a", "c", 7 ] == [ "a", "d", "f" ] #=> false
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_equal(VALUE ary1, VALUE ary2)
|
|
{
|
|
if (ary1 == ary2) return Qtrue;
|
|
if (!RB_TYPE_P(ary2, T_ARRAY)) {
|
|
if (!rb_respond_to(ary2, rb_intern("to_ary"))) {
|
|
return Qfalse;
|
|
}
|
|
return rb_equal(ary2, ary1);
|
|
}
|
|
if (RARRAY_LEN(ary1) != RARRAY_LEN(ary2)) return Qfalse;
|
|
return rb_exec_recursive_paired(recursive_equal, ary1, ary2, ary2);
|
|
}
|
|
|
|
static VALUE
|
|
recursive_eql(VALUE ary1, VALUE ary2, int recur)
|
|
{
|
|
long i;
|
|
|
|
if (recur) return Qtrue; /* Subtle! */
|
|
for (i=0; i<RARRAY_LEN(ary1); i++) {
|
|
if (!rb_eql(rb_ary_elt(ary1, i), rb_ary_elt(ary2, i)))
|
|
return Qfalse;
|
|
}
|
|
return Qtrue;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.eql?(other) -> true or false
|
|
*
|
|
* Returns +true+ if +self+ and +other+ are the same object,
|
|
* or are both arrays with the same content.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_eql(VALUE ary1, VALUE ary2)
|
|
{
|
|
if (ary1 == ary2) return Qtrue;
|
|
if (!RB_TYPE_P(ary2, T_ARRAY)) return Qfalse;
|
|
if (RARRAY_LEN(ary1) != RARRAY_LEN(ary2)) return Qfalse;
|
|
return rb_exec_recursive_paired(recursive_eql, ary1, ary2, ary2);
|
|
}
|
|
|
|
static VALUE
|
|
recursive_hash(VALUE ary, VALUE dummy, int recur)
|
|
{
|
|
long i;
|
|
st_index_t h;
|
|
VALUE n;
|
|
|
|
h = rb_hash_start(RARRAY_LEN(ary));
|
|
if (recur) {
|
|
h = rb_hash_uint(h, NUM2LONG(rb_hash(rb_cArray)));
|
|
}
|
|
else {
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
n = rb_hash(RARRAY_PTR(ary)[i]);
|
|
h = rb_hash_uint(h, NUM2LONG(n));
|
|
}
|
|
}
|
|
h = rb_hash_end(h);
|
|
return LONG2FIX(h);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.hash -> fixnum
|
|
*
|
|
* Compute a hash-code for this array.
|
|
*
|
|
* Two arrays with the same content will have the same hash code (and will
|
|
* compare using #eql?).
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_hash(VALUE ary)
|
|
{
|
|
return rb_exec_recursive_outer(recursive_hash, ary, 0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.include?(object) -> true or false
|
|
*
|
|
* Returns +true+ if the given +object+ is present in +self+ (that is, if any
|
|
* element <code>==</code> +object+), otherwise returns +false+.
|
|
*
|
|
* a = [ "a", "b", "c" ]
|
|
* a.include?("b") #=> true
|
|
* a.include?("z") #=> false
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_includes(VALUE ary, VALUE item)
|
|
{
|
|
long i;
|
|
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
if (rb_equal(RARRAY_PTR(ary)[i], item)) {
|
|
return Qtrue;
|
|
}
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
|
|
static VALUE
|
|
recursive_cmp(VALUE ary1, VALUE ary2, int recur)
|
|
{
|
|
long i, len;
|
|
|
|
if (recur) return Qundef; /* Subtle! */
|
|
len = RARRAY_LEN(ary1);
|
|
if (len > RARRAY_LEN(ary2)) {
|
|
len = RARRAY_LEN(ary2);
|
|
}
|
|
for (i=0; i<len; i++) {
|
|
VALUE v = rb_funcall(rb_ary_elt(ary1, i), id_cmp, 1, rb_ary_elt(ary2, i));
|
|
if (v != INT2FIX(0)) {
|
|
return v;
|
|
}
|
|
}
|
|
return Qundef;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary <=> other_ary -> -1, 0, +1 or nil
|
|
*
|
|
* Comparison --- Returns an integer (+-1+, +0+, or <code>+1</code>) if this
|
|
* array is less than, equal to, or greater than +other_ary+.
|
|
*
|
|
* +nil+ is returned if the two values are incomparable.
|
|
*
|
|
* Each object in each array is compared (using the <=> operator).
|
|
*
|
|
* Arrays are compared in an "element-wise" manner; the first two elements
|
|
* that are not equal will determine the return value for the whole
|
|
* comparison.
|
|
*
|
|
* If all the values are equal, then the return is based on a comparison of
|
|
* the array lengths. Thus, two arrays are "equal" according to Array#<=> if,
|
|
* and only if, they have the same length and the value of each element is
|
|
* equal to the value of the corresponding element in the other array.
|
|
*
|
|
* [ "a", "a", "c" ] <=> [ "a", "b", "c" ] #=> -1
|
|
* [ 1, 2, 3, 4, 5, 6 ] <=> [ 1, 2 ] #=> +1
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_ary_cmp(VALUE ary1, VALUE ary2)
|
|
{
|
|
long len;
|
|
VALUE v;
|
|
|
|
ary2 = rb_check_array_type(ary2);
|
|
if (NIL_P(ary2)) return Qnil;
|
|
if (ary1 == ary2) return INT2FIX(0);
|
|
v = rb_exec_recursive_paired(recursive_cmp, ary1, ary2, ary2);
|
|
if (v != Qundef) return v;
|
|
len = RARRAY_LEN(ary1) - RARRAY_LEN(ary2);
|
|
if (len == 0) return INT2FIX(0);
|
|
if (len > 0) return INT2FIX(1);
|
|
return INT2FIX(-1);
|
|
}
|
|
|
|
static VALUE
|
|
ary_add_hash(VALUE hash, VALUE ary)
|
|
{
|
|
long i;
|
|
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
rb_hash_aset(hash, RARRAY_PTR(ary)[i], Qtrue);
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
static inline VALUE
|
|
ary_tmp_hash_new(void)
|
|
{
|
|
VALUE hash = rb_hash_new();
|
|
|
|
RBASIC(hash)->klass = 0;
|
|
return hash;
|
|
}
|
|
|
|
static VALUE
|
|
ary_make_hash(VALUE ary)
|
|
{
|
|
VALUE hash = ary_tmp_hash_new();
|
|
return ary_add_hash(hash, ary);
|
|
}
|
|
|
|
static VALUE
|
|
ary_add_hash_by(VALUE hash, VALUE ary)
|
|
{
|
|
long i;
|
|
|
|
for (i = 0; i < RARRAY_LEN(ary); ++i) {
|
|
VALUE v = rb_ary_elt(ary, i), k = rb_yield(v);
|
|
if (rb_hash_lookup2(hash, k, Qundef) == Qundef) {
|
|
rb_hash_aset(hash, k, v);
|
|
}
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
static VALUE
|
|
ary_make_hash_by(VALUE ary)
|
|
{
|
|
VALUE hash = ary_tmp_hash_new();
|
|
return ary_add_hash_by(hash, ary);
|
|
}
|
|
|
|
static inline void
|
|
ary_recycle_hash(VALUE hash)
|
|
{
|
|
if (RHASH(hash)->ntbl) {
|
|
st_table *tbl = RHASH(hash)->ntbl;
|
|
RHASH(hash)->ntbl = 0;
|
|
st_free_table(tbl);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary - other_ary -> new_ary
|
|
*
|
|
* Array Difference
|
|
*
|
|
* Returns a new array that is a copy of the original array, removing any
|
|
* items that also appear in +other_ary+. The order is preserved from the
|
|
* original array.
|
|
*
|
|
* It compares elements using their #hash and #eql? methods for efficiency.
|
|
*
|
|
* [ 1, 1, 2, 2, 3, 3, 4, 5 ] - [ 1, 2, 4 ] #=> [ 3, 3, 5 ]
|
|
*
|
|
* If you need set-like behavior, see the library class Set.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_diff(VALUE ary1, VALUE ary2)
|
|
{
|
|
VALUE ary3;
|
|
volatile VALUE hash;
|
|
long i;
|
|
|
|
hash = ary_make_hash(to_ary(ary2));
|
|
ary3 = rb_ary_new();
|
|
|
|
for (i=0; i<RARRAY_LEN(ary1); i++) {
|
|
if (st_lookup(RHASH_TBL(hash), RARRAY_PTR(ary1)[i], 0)) continue;
|
|
rb_ary_push(ary3, rb_ary_elt(ary1, i));
|
|
}
|
|
ary_recycle_hash(hash);
|
|
return ary3;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary & other_ary -> new_ary
|
|
*
|
|
* Set Intersection --- Returns a new array containing elements common to the
|
|
* two arrays, excluding any duplicates. The order is preserved from the
|
|
* original array.
|
|
*
|
|
* It compares elements using their #hash and #eql? methods for efficiency.
|
|
*
|
|
* [ 1, 1, 3, 5 ] & [ 1, 2, 3 ] #=> [ 1, 3 ]
|
|
* [ 'a', 'b', 'b', 'z' ] & [ 'a', 'b', 'c' ] #=> [ 'a', 'b' ]
|
|
*
|
|
* See also Array#uniq.
|
|
*/
|
|
|
|
|
|
static VALUE
|
|
rb_ary_and(VALUE ary1, VALUE ary2)
|
|
{
|
|
VALUE hash, ary3, v;
|
|
st_data_t vv;
|
|
long i;
|
|
|
|
ary2 = to_ary(ary2);
|
|
ary3 = rb_ary_new2(RARRAY_LEN(ary1) < RARRAY_LEN(ary2) ?
|
|
RARRAY_LEN(ary1) : RARRAY_LEN(ary2));
|
|
hash = ary_make_hash(ary2);
|
|
|
|
if (RHASH_EMPTY_P(hash))
|
|
return ary3;
|
|
|
|
for (i=0; i<RARRAY_LEN(ary1); i++) {
|
|
vv = (st_data_t)(v = rb_ary_elt(ary1, i));
|
|
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
|
|
rb_ary_push(ary3, v);
|
|
}
|
|
}
|
|
ary_recycle_hash(hash);
|
|
|
|
return ary3;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary | other_ary -> new_ary
|
|
*
|
|
* Set Union --- Returns a new array by joining +ary+ with +other_ary+,
|
|
* excluding any duplicates and preserving the order from the original array.
|
|
*
|
|
* It compares elements using their #hash and #eql? methods for efficiency.
|
|
*
|
|
* [ "a", "b", "c" ] | [ "c", "d", "a" ] #=> [ "a", "b", "c", "d" ]
|
|
*
|
|
* See also Array#uniq.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_or(VALUE ary1, VALUE ary2)
|
|
{
|
|
VALUE hash, ary3, v;
|
|
st_data_t vv;
|
|
long i;
|
|
|
|
ary2 = to_ary(ary2);
|
|
ary3 = rb_ary_new2(RARRAY_LEN(ary1)+RARRAY_LEN(ary2));
|
|
hash = ary_add_hash(ary_make_hash(ary1), ary2);
|
|
|
|
for (i=0; i<RARRAY_LEN(ary1); i++) {
|
|
vv = (st_data_t)(v = rb_ary_elt(ary1, i));
|
|
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
|
|
rb_ary_push(ary3, v);
|
|
}
|
|
}
|
|
for (i=0; i<RARRAY_LEN(ary2); i++) {
|
|
vv = (st_data_t)(v = rb_ary_elt(ary2, i));
|
|
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
|
|
rb_ary_push(ary3, v);
|
|
}
|
|
}
|
|
ary_recycle_hash(hash);
|
|
return ary3;
|
|
}
|
|
|
|
static int
|
|
push_value(st_data_t key, st_data_t val, st_data_t ary)
|
|
{
|
|
rb_ary_push((VALUE)ary, (VALUE)val);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.uniq! -> ary or nil
|
|
* ary.uniq! { |item| ... } -> ary or nil
|
|
*
|
|
* Removes duplicate elements from +self+.
|
|
*
|
|
* If a block is given, it will use the return value of the block for
|
|
* comparison.
|
|
*
|
|
* It compares values using their #hash and #eql? methods for efficiency.
|
|
*
|
|
* Returns +nil+ if no changes are made (that is, no duplicates are found).
|
|
*
|
|
* a = [ "a", "a", "b", "b", "c" ]
|
|
* a.uniq! # => ["a", "b", "c"]
|
|
*
|
|
* b = [ "a", "b", "c" ]
|
|
* b.uniq! # => nil
|
|
*
|
|
* c = [["student","sam"], ["student","george"], ["teacher","matz"]]
|
|
* c.uniq! { |s| s.first } # => [["student", "sam"], ["teacher", "matz"]]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_uniq_bang(VALUE ary)
|
|
{
|
|
VALUE hash, v;
|
|
long i, j;
|
|
|
|
rb_ary_modify_check(ary);
|
|
if (RARRAY_LEN(ary) <= 1)
|
|
return Qnil;
|
|
if (rb_block_given_p()) {
|
|
hash = ary_make_hash_by(ary);
|
|
if (RARRAY_LEN(ary) == (i = RHASH_SIZE(hash))) {
|
|
return Qnil;
|
|
}
|
|
ARY_SET_LEN(ary, 0);
|
|
if (ARY_SHARED_P(ary) && !ARY_EMBED_P(ary)) {
|
|
rb_ary_unshare(ary);
|
|
FL_SET_EMBED(ary);
|
|
}
|
|
ary_resize_capa(ary, i);
|
|
st_foreach(RHASH_TBL(hash), push_value, ary);
|
|
}
|
|
else {
|
|
hash = ary_make_hash(ary);
|
|
if (RARRAY_LEN(ary) == (long)RHASH_SIZE(hash)) {
|
|
return Qnil;
|
|
}
|
|
for (i=j=0; i<RARRAY_LEN(ary); i++) {
|
|
st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i));
|
|
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
|
|
rb_ary_store(ary, j++, v);
|
|
}
|
|
}
|
|
ARY_SET_LEN(ary, j);
|
|
}
|
|
ary_recycle_hash(hash);
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.uniq -> new_ary
|
|
* ary.uniq { |item| ... } -> new_ary
|
|
*
|
|
* Returns a new array by removing duplicate values in +self+.
|
|
*
|
|
* If a block is given, it will use the return value of the block for comparison.
|
|
*
|
|
* It compares values using their #hash and #eql? methods for efficiency.
|
|
*
|
|
* a = [ "a", "a", "b", "b", "c" ]
|
|
* a.uniq # => ["a", "b", "c"]
|
|
*
|
|
* b = [["student","sam"], ["student","george"], ["teacher","matz"]]
|
|
* b.uniq { |s| s.first } # => [["student", "sam"], ["teacher", "matz"]]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_uniq(VALUE ary)
|
|
{
|
|
VALUE hash, uniq, v;
|
|
long i;
|
|
|
|
if (RARRAY_LEN(ary) <= 1)
|
|
return rb_ary_dup(ary);
|
|
if (rb_block_given_p()) {
|
|
hash = ary_make_hash_by(ary);
|
|
uniq = ary_new(rb_obj_class(ary), RHASH_SIZE(hash));
|
|
st_foreach(RHASH_TBL(hash), push_value, uniq);
|
|
}
|
|
else {
|
|
hash = ary_make_hash(ary);
|
|
uniq = ary_new(rb_obj_class(ary), RHASH_SIZE(hash));
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i));
|
|
if (st_delete(RHASH_TBL(hash), &vv, 0)) {
|
|
rb_ary_push(uniq, v);
|
|
}
|
|
}
|
|
}
|
|
ary_recycle_hash(hash);
|
|
|
|
return uniq;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.compact! -> ary or nil
|
|
*
|
|
* Removes +nil+ elements from the array.
|
|
*
|
|
* Returns +nil+ if no changes were made, otherwise returns the array.
|
|
*
|
|
* [ "a", nil, "b", nil, "c" ].compact! #=> [ "a", "b", "c" ]
|
|
* [ "a", "b", "c" ].compact! #=> nil
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_compact_bang(VALUE ary)
|
|
{
|
|
VALUE *p, *t, *end;
|
|
long n;
|
|
|
|
rb_ary_modify(ary);
|
|
p = t = RARRAY_PTR(ary);
|
|
end = p + RARRAY_LEN(ary);
|
|
|
|
while (t < end) {
|
|
if (NIL_P(*t)) t++;
|
|
else *p++ = *t++;
|
|
}
|
|
n = p - RARRAY_PTR(ary);
|
|
if (RARRAY_LEN(ary) == n) {
|
|
return Qnil;
|
|
}
|
|
ARY_SET_LEN(ary, n);
|
|
if (n * 2 < ARY_CAPA(ary) && ARY_DEFAULT_SIZE * 2 < ARY_CAPA(ary)) {
|
|
ary_resize_capa(ary, n * 2);
|
|
}
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.compact -> new_ary
|
|
*
|
|
* Returns a copy of +self+ with all +nil+ elements removed.
|
|
*
|
|
* [ "a", nil, "b", nil, "c", nil ].compact
|
|
* #=> [ "a", "b", "c" ]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_compact(VALUE ary)
|
|
{
|
|
ary = rb_ary_dup(ary);
|
|
rb_ary_compact_bang(ary);
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.count -> int
|
|
* ary.count(obj) -> int
|
|
* ary.count { |item| block } -> int
|
|
*
|
|
* Returns the number of elements.
|
|
*
|
|
* If an argument is given, counts the number of elements which equal +obj+
|
|
* using <code>===</code>.
|
|
*
|
|
* If a block is given, counts the number of elements for which the block
|
|
* returns a true value.
|
|
*
|
|
* ary = [1, 2, 4, 2]
|
|
* ary.count #=> 4
|
|
* ary.count(2) #=> 2
|
|
* ary.count { |x| x%2 == 0 } #=> 3
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_count(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
long n = 0;
|
|
|
|
if (argc == 0) {
|
|
VALUE *p, *pend;
|
|
|
|
if (!rb_block_given_p())
|
|
return LONG2NUM(RARRAY_LEN(ary));
|
|
|
|
for (p = RARRAY_PTR(ary), pend = p + RARRAY_LEN(ary); p < pend; p++) {
|
|
if (RTEST(rb_yield(*p))) n++;
|
|
}
|
|
}
|
|
else {
|
|
VALUE obj, *p, *pend;
|
|
|
|
rb_scan_args(argc, argv, "1", &obj);
|
|
if (rb_block_given_p()) {
|
|
rb_warn("given block not used");
|
|
}
|
|
for (p = RARRAY_PTR(ary), pend = p + RARRAY_LEN(ary); p < pend; p++) {
|
|
if (rb_equal(*p, obj)) n++;
|
|
}
|
|
}
|
|
|
|
return LONG2NUM(n);
|
|
}
|
|
|
|
static VALUE
|
|
flatten(VALUE ary, int level, int *modified)
|
|
{
|
|
long i = 0;
|
|
VALUE stack, result, tmp, elt;
|
|
st_table *memo;
|
|
st_data_t id;
|
|
|
|
stack = ary_new(0, ARY_DEFAULT_SIZE);
|
|
result = ary_new(0, RARRAY_LEN(ary));
|
|
memo = st_init_numtable();
|
|
st_insert(memo, (st_data_t)ary, (st_data_t)Qtrue);
|
|
*modified = 0;
|
|
|
|
while (1) {
|
|
while (i < RARRAY_LEN(ary)) {
|
|
elt = RARRAY_PTR(ary)[i++];
|
|
tmp = rb_check_array_type(elt);
|
|
if (RBASIC(result)->klass) {
|
|
rb_raise(rb_eRuntimeError, "flatten reentered");
|
|
}
|
|
if (NIL_P(tmp) || (level >= 0 && RARRAY_LEN(stack) / 2 >= level)) {
|
|
rb_ary_push(result, elt);
|
|
}
|
|
else {
|
|
*modified = 1;
|
|
id = (st_data_t)tmp;
|
|
if (st_lookup(memo, id, 0)) {
|
|
st_free_table(memo);
|
|
rb_raise(rb_eArgError, "tried to flatten recursive array");
|
|
}
|
|
st_insert(memo, id, (st_data_t)Qtrue);
|
|
rb_ary_push(stack, ary);
|
|
rb_ary_push(stack, LONG2NUM(i));
|
|
ary = tmp;
|
|
i = 0;
|
|
}
|
|
}
|
|
if (RARRAY_LEN(stack) == 0) {
|
|
break;
|
|
}
|
|
id = (st_data_t)ary;
|
|
st_delete(memo, &id, 0);
|
|
tmp = rb_ary_pop(stack);
|
|
i = NUM2LONG(tmp);
|
|
ary = rb_ary_pop(stack);
|
|
}
|
|
|
|
st_free_table(memo);
|
|
|
|
RBASIC(result)->klass = rb_class_of(ary);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.flatten! -> ary or nil
|
|
* ary.flatten!(level) -> ary or nil
|
|
*
|
|
* Flattens +self+ in place.
|
|
*
|
|
* Returns +nil+ if no modifications were made (i.e., the array contains no
|
|
* subarrays.)
|
|
*
|
|
* The optional +level+ argument determines the level of recursion to flatten.
|
|
*
|
|
* a = [ 1, 2, [3, [4, 5] ] ]
|
|
* a.flatten! #=> [1, 2, 3, 4, 5]
|
|
* a.flatten! #=> nil
|
|
* a #=> [1, 2, 3, 4, 5]
|
|
* a = [ 1, 2, [3, [4, 5] ] ]
|
|
* a.flatten!(1) #=> [1, 2, 3, [4, 5]]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_flatten_bang(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
int mod = 0, level = -1;
|
|
VALUE result, lv;
|
|
|
|
rb_scan_args(argc, argv, "01", &lv);
|
|
rb_ary_modify_check(ary);
|
|
if (!NIL_P(lv)) level = NUM2INT(lv);
|
|
if (level == 0) return Qnil;
|
|
|
|
result = flatten(ary, level, &mod);
|
|
if (mod == 0) {
|
|
ary_discard(result);
|
|
return Qnil;
|
|
}
|
|
if (!(mod = ARY_EMBED_P(result))) rb_obj_freeze(result);
|
|
rb_ary_replace(ary, result);
|
|
if (mod) ARY_SET_EMBED_LEN(result, 0);
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.flatten -> new_ary
|
|
* ary.flatten(level) -> new_ary
|
|
*
|
|
* Returns a new array that is a one-dimensional flattening of +self+
|
|
* (recursively).
|
|
*
|
|
* That is, for every element that is an array, extract its elements into
|
|
* the new array.
|
|
*
|
|
* The optional +level+ argument determines the level of recursion to
|
|
* flatten.
|
|
*
|
|
* s = [ 1, 2, 3 ] #=> [1, 2, 3]
|
|
* t = [ 4, 5, 6, [7, 8] ] #=> [4, 5, 6, [7, 8]]
|
|
* a = [ s, t, 9, 10 ] #=> [[1, 2, 3], [4, 5, 6, [7, 8]], 9, 10]
|
|
* a.flatten #=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
|
|
* a = [ 1, 2, [3, [4, 5] ] ]
|
|
* a.flatten(1) #=> [1, 2, 3, [4, 5]]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_flatten(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
int mod = 0, level = -1;
|
|
VALUE result, lv;
|
|
|
|
rb_scan_args(argc, argv, "01", &lv);
|
|
if (!NIL_P(lv)) level = NUM2INT(lv);
|
|
if (level == 0) return ary_make_shared_copy(ary);
|
|
|
|
result = flatten(ary, level, &mod);
|
|
OBJ_INFECT(result, ary);
|
|
|
|
return result;
|
|
}
|
|
|
|
#define OPTHASH_GIVEN_P(opts) \
|
|
(argc > 0 && !NIL_P((opts) = rb_check_hash_type(argv[argc-1])) && (--argc, 1))
|
|
static VALUE sym_random;
|
|
|
|
#define RAND_UPTO(max) (long)rb_random_ulong_limited((randgen), (max)-1)
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.shuffle! -> ary
|
|
* ary.shuffle!(random: rng) -> ary
|
|
*
|
|
* Shuffles elements in +self+ in place.
|
|
*
|
|
* The optional +rng+ argument will be used as the random number generator.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_shuffle_bang(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE *ptr, opts, *snap_ptr, randgen = rb_cRandom;
|
|
long i, snap_len;
|
|
|
|
if (OPTHASH_GIVEN_P(opts)) {
|
|
randgen = rb_hash_lookup2(opts, sym_random, randgen);
|
|
}
|
|
rb_check_arity(argc, 0, 0);
|
|
rb_ary_modify(ary);
|
|
i = RARRAY_LEN(ary);
|
|
ptr = RARRAY_PTR(ary);
|
|
snap_len = i;
|
|
snap_ptr = ptr;
|
|
while (i) {
|
|
long j = RAND_UPTO(i);
|
|
VALUE tmp;
|
|
if (snap_len != RARRAY_LEN(ary) || snap_ptr != RARRAY_PTR(ary)) {
|
|
rb_raise(rb_eRuntimeError, "modified during shuffle");
|
|
}
|
|
tmp = ptr[--i];
|
|
ptr[i] = ptr[j];
|
|
ptr[j] = tmp;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.shuffle -> new_ary
|
|
* ary.shuffle(random: rng) -> new_ary
|
|
*
|
|
* Returns a new array with elements of +self+ shuffled.
|
|
*
|
|
* a = [ 1, 2, 3 ] #=> [1, 2, 3]
|
|
* a.shuffle #=> [2, 3, 1]
|
|
*
|
|
* The optional +rng+ argument will be used as the random number generator.
|
|
*
|
|
* a.shuffle(random: Random.new(1)) #=> [1, 3, 2]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_shuffle(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
ary = rb_ary_dup(ary);
|
|
rb_ary_shuffle_bang(argc, argv, ary);
|
|
return ary;
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.sample -> obj
|
|
* ary.sample(random: rng) -> obj
|
|
* ary.sample(n) -> new_ary
|
|
* ary.sample(n, random: rng) -> new_ary
|
|
*
|
|
* Choose a random element or +n+ random elements from the array.
|
|
*
|
|
* The elements are chosen by using random and unique indices into the array
|
|
* in order to ensure that an element doesn't repeat itself unless the array
|
|
* already contained duplicate elements.
|
|
*
|
|
* If the array is empty the first form returns +nil+ and the second form
|
|
* returns an empty array.
|
|
*
|
|
* The optional +rng+ argument will be used as the random number generator.
|
|
*
|
|
* a = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]
|
|
* a.sample #=> 7
|
|
* a.sample(4) #=> [6, 4, 2, 5]
|
|
*/
|
|
|
|
|
|
static VALUE
|
|
rb_ary_sample(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE nv, result, *ptr;
|
|
VALUE opts, randgen = rb_cRandom;
|
|
long n, len, i, j, k, idx[10];
|
|
long rnds[numberof(idx)];
|
|
|
|
if (OPTHASH_GIVEN_P(opts)) {
|
|
randgen = rb_hash_lookup2(opts, sym_random, randgen);
|
|
}
|
|
ptr = RARRAY_PTR(ary);
|
|
len = RARRAY_LEN(ary);
|
|
if (argc == 0) {
|
|
if (len == 0) return Qnil;
|
|
if (len == 1) {
|
|
i = 0;
|
|
}
|
|
else {
|
|
i = RAND_UPTO(len);
|
|
if ((len = RARRAY_LEN(ary)) <= i) return Qnil;
|
|
ptr = RARRAY_PTR(ary);
|
|
}
|
|
return ptr[i];
|
|
}
|
|
rb_scan_args(argc, argv, "1", &nv);
|
|
n = NUM2LONG(nv);
|
|
if (n < 0) rb_raise(rb_eArgError, "negative sample number");
|
|
if (n > len) n = len;
|
|
if (n <= numberof(idx)) {
|
|
for (i = 0; i < n; ++i) {
|
|
rnds[i] = RAND_UPTO(len - i);
|
|
}
|
|
}
|
|
k = len;
|
|
len = RARRAY_LEN(ary);
|
|
ptr = RARRAY_PTR(ary);
|
|
if (len < k) {
|
|
if (n <= numberof(idx)) {
|
|
for (i = 0; i < n; ++i) {
|
|
if (rnds[i] >= len) {
|
|
return rb_ary_new2(0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (n > len) n = len;
|
|
switch (n) {
|
|
case 0:
|
|
return rb_ary_new2(0);
|
|
case 1:
|
|
i = rnds[0];
|
|
return rb_ary_new4(1, &ptr[i]);
|
|
case 2:
|
|
i = rnds[0];
|
|
j = rnds[1];
|
|
if (j >= i) j++;
|
|
return rb_ary_new3(2, ptr[i], ptr[j]);
|
|
case 3:
|
|
i = rnds[0];
|
|
j = rnds[1];
|
|
k = rnds[2];
|
|
{
|
|
long l = j, g = i;
|
|
if (j >= i) l = i, g = ++j;
|
|
if (k >= l && (++k >= g)) ++k;
|
|
}
|
|
return rb_ary_new3(3, ptr[i], ptr[j], ptr[k]);
|
|
}
|
|
if (n <= numberof(idx)) {
|
|
VALUE *ptr_result;
|
|
long sorted[numberof(idx)];
|
|
sorted[0] = idx[0] = rnds[0];
|
|
for (i=1; i<n; i++) {
|
|
k = rnds[i];
|
|
for (j = 0; j < i; ++j) {
|
|
if (k < sorted[j]) break;
|
|
++k;
|
|
}
|
|
memmove(&sorted[j+1], &sorted[j], sizeof(sorted[0])*(i-j));
|
|
sorted[j] = idx[i] = k;
|
|
}
|
|
result = rb_ary_new2(n);
|
|
ptr_result = RARRAY_PTR(result);
|
|
for (i=0; i<n; i++) {
|
|
ptr_result[i] = ptr[idx[i]];
|
|
}
|
|
}
|
|
else {
|
|
VALUE *ptr_result;
|
|
result = rb_ary_new4(len, ptr);
|
|
RBASIC(result)->klass = 0;
|
|
ptr_result = RARRAY_PTR(result);
|
|
RB_GC_GUARD(ary);
|
|
for (i=0; i<n; i++) {
|
|
j = RAND_UPTO(len-i) + i;
|
|
nv = ptr_result[j];
|
|
ptr_result[j] = ptr_result[i];
|
|
ptr_result[i] = nv;
|
|
}
|
|
RBASIC(result)->klass = rb_cArray;
|
|
}
|
|
ARY_SET_LEN(result, n);
|
|
|
|
return result;
|
|
}
|
|
|
|
static VALUE
|
|
rb_ary_cycle_size(VALUE self, VALUE args)
|
|
{
|
|
long mul;
|
|
VALUE n = Qnil;
|
|
if (args && (RARRAY_LEN(args) > 0)) {
|
|
n = RARRAY_PTR(args)[0];
|
|
}
|
|
if (RARRAY_LEN(self) == 0) return INT2FIX(0);
|
|
if (n == Qnil) return DBL2NUM(INFINITY);
|
|
mul = NUM2LONG(n);
|
|
if (mul <= 0) return INT2FIX(0);
|
|
return rb_funcall(rb_ary_length(self), '*', 1, LONG2FIX(mul));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.cycle(n=nil) { |obj| block } -> nil
|
|
* ary.cycle(n=nil) -> Enumerator
|
|
*
|
|
* Calls the given block for each element +n+ times or forever if +nil+ is
|
|
* given.
|
|
*
|
|
* Does nothing if a non-positive number is given or the array is empty.
|
|
*
|
|
* Returns +nil+ if the loop has finished without getting interrupted.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* a = ["a", "b", "c"]
|
|
* a.cycle { |x| puts x } # print, a, b, c, a, b, c,.. forever.
|
|
* a.cycle(2) { |x| puts x } # print, a, b, c, a, b, c.
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_cycle(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
long n, i;
|
|
VALUE nv = Qnil;
|
|
|
|
rb_scan_args(argc, argv, "01", &nv);
|
|
|
|
RETURN_SIZED_ENUMERATOR(ary, argc, argv, rb_ary_cycle_size);
|
|
if (NIL_P(nv)) {
|
|
n = -1;
|
|
}
|
|
else {
|
|
n = NUM2LONG(nv);
|
|
if (n <= 0) return Qnil;
|
|
}
|
|
|
|
while (RARRAY_LEN(ary) > 0 && (n < 0 || 0 < n--)) {
|
|
for (i=0; i<RARRAY_LEN(ary); i++) {
|
|
rb_yield(RARRAY_PTR(ary)[i]);
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
#define tmpbuf(n, size) rb_str_tmp_new((n)*(size))
|
|
#define tmpbuf_discard(s) (rb_str_resize((s), 0L), RBASIC(s)->klass = rb_cString)
|
|
#define tmpary(n) rb_ary_tmp_new(n)
|
|
#define tmpary_discard(a) (ary_discard(a), RBASIC(a)->klass = rb_cArray)
|
|
|
|
/*
|
|
* Recursively compute permutations of +r+ elements of the set
|
|
* <code>[0..n-1]</code>.
|
|
*
|
|
* When we have a complete permutation of array indexes, copy the values
|
|
* at those indexes into a new array and yield that array.
|
|
*
|
|
* n: the size of the set
|
|
* r: the number of elements in each permutation
|
|
* p: the array (of size r) that we're filling in
|
|
* index: what index we're filling in now
|
|
* used: an array of booleans: whether a given index is already used
|
|
* values: the Ruby array that holds the actual values to permute
|
|
*/
|
|
static void
|
|
permute0(long n, long r, long *p, long index, char *used, VALUE values)
|
|
{
|
|
long i,j;
|
|
for (i = 0; i < n; i++) {
|
|
if (used[i] == 0) {
|
|
p[index] = i;
|
|
if (index < r-1) { /* if not done yet */
|
|
used[i] = 1; /* mark index used */
|
|
permute0(n, r, p, index+1, /* recurse */
|
|
used, values);
|
|
used[i] = 0; /* index unused */
|
|
}
|
|
else {
|
|
/* We have a complete permutation of array indexes */
|
|
/* Build a ruby array of the corresponding values */
|
|
/* And yield it to the associated block */
|
|
VALUE result = rb_ary_new2(r);
|
|
VALUE *result_array = RARRAY_PTR(result);
|
|
const VALUE *values_array = RARRAY_PTR(values);
|
|
|
|
for (j = 0; j < r; j++) result_array[j] = values_array[p[j]];
|
|
ARY_SET_LEN(result, r);
|
|
rb_yield(result);
|
|
if (RBASIC(values)->klass) {
|
|
rb_raise(rb_eRuntimeError, "permute reentered");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns the product of from, from-1, ..., from - how_many + 1.
|
|
* http://en.wikipedia.org/wiki/Pochhammer_symbol
|
|
*/
|
|
static VALUE
|
|
descending_factorial(long from, long how_many)
|
|
{
|
|
VALUE cnt = LONG2FIX(how_many >= 0);
|
|
while (how_many-- > 0) {
|
|
cnt = rb_funcall(cnt, '*', 1, LONG2FIX(from--));
|
|
}
|
|
return cnt;
|
|
}
|
|
|
|
static VALUE
|
|
binomial_coefficient(long comb, long size)
|
|
{
|
|
if (comb > size-comb) {
|
|
comb = size-comb;
|
|
}
|
|
if (comb < 0) {
|
|
return LONG2FIX(0);
|
|
}
|
|
return rb_funcall(descending_factorial(size, comb), id_div, 1, descending_factorial(comb, comb));
|
|
}
|
|
|
|
static VALUE
|
|
rb_ary_permutation_size(VALUE ary, VALUE args)
|
|
{
|
|
long n = RARRAY_LEN(ary);
|
|
long k = (args && (RARRAY_LEN(args) > 0)) ? NUM2LONG(RARRAY_PTR(args)[0]) : n;
|
|
|
|
return descending_factorial(n, k);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.permutation { |p| block } -> ary
|
|
* ary.permutation -> Enumerator
|
|
* ary.permutation(n) { |p| block } -> ary
|
|
* ary.permutation(n) -> Enumerator
|
|
*
|
|
* When invoked with a block, yield all permutations of length +n+ of the
|
|
* elements of the array, then return the array itself.
|
|
*
|
|
* If +n+ is not specified, yield all permutations of all elements.
|
|
*
|
|
* The implementation makes no guarantees about the order in which the
|
|
* permutations are yielded.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* Examples:
|
|
*
|
|
* a = [1, 2, 3]
|
|
* a.permutation.to_a #=> [[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
|
|
* a.permutation(1).to_a #=> [[1],[2],[3]]
|
|
* a.permutation(2).to_a #=> [[1,2],[1,3],[2,1],[2,3],[3,1],[3,2]]
|
|
* a.permutation(3).to_a #=> [[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
|
|
* a.permutation(0).to_a #=> [[]] # one permutation of length 0
|
|
* a.permutation(4).to_a #=> [] # no permutations of length 4
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_permutation(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
VALUE num;
|
|
long r, n, i;
|
|
|
|
n = RARRAY_LEN(ary); /* Array length */
|
|
RETURN_SIZED_ENUMERATOR(ary, argc, argv, rb_ary_permutation_size); /* Return enumerator if no block */
|
|
rb_scan_args(argc, argv, "01", &num);
|
|
r = NIL_P(num) ? n : NUM2LONG(num); /* Permutation size from argument */
|
|
|
|
if (r < 0 || n < r) {
|
|
/* no permutations: yield nothing */
|
|
}
|
|
else if (r == 0) { /* exactly one permutation: the zero-length array */
|
|
rb_yield(rb_ary_new2(0));
|
|
}
|
|
else if (r == 1) { /* this is a special, easy case */
|
|
for (i = 0; i < RARRAY_LEN(ary); i++) {
|
|
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
|
|
}
|
|
}
|
|
else { /* this is the general case */
|
|
volatile VALUE t0 = tmpbuf(n,sizeof(long));
|
|
long *p = (long*)RSTRING_PTR(t0);
|
|
volatile VALUE t1 = tmpbuf(n,sizeof(char));
|
|
char *used = (char*)RSTRING_PTR(t1);
|
|
VALUE ary0 = ary_make_shared_copy(ary); /* private defensive copy of ary */
|
|
RBASIC(ary0)->klass = 0;
|
|
|
|
MEMZERO(used, char, n); /* initialize array */
|
|
|
|
permute0(n, r, p, 0, used, ary0); /* compute and yield permutations */
|
|
tmpbuf_discard(t0);
|
|
tmpbuf_discard(t1);
|
|
RBASIC(ary0)->klass = rb_cArray;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
static VALUE
|
|
rb_ary_combination_size(VALUE ary, VALUE args)
|
|
{
|
|
long n = RARRAY_LEN(ary);
|
|
long k = NUM2LONG(RARRAY_PTR(args)[0]);
|
|
|
|
return binomial_coefficient(k, n);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.combination(n) { |c| block } -> ary
|
|
* ary.combination(n) -> Enumerator
|
|
*
|
|
* When invoked with a block, yields all combinations of length +n+ of elements
|
|
* from the array and then returns the array itself.
|
|
*
|
|
* The implementation makes no guarantees about the order in which the
|
|
* combinations are yielded.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* Examples:
|
|
*
|
|
* a = [1, 2, 3, 4]
|
|
* a.combination(1).to_a #=> [[1],[2],[3],[4]]
|
|
* a.combination(2).to_a #=> [[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]]
|
|
* a.combination(3).to_a #=> [[1,2,3],[1,2,4],[1,3,4],[2,3,4]]
|
|
* a.combination(4).to_a #=> [[1,2,3,4]]
|
|
* a.combination(0).to_a #=> [[]] # one combination of length 0
|
|
* a.combination(5).to_a #=> [] # no combinations of length 5
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_combination(VALUE ary, VALUE num)
|
|
{
|
|
long n, i, len;
|
|
|
|
n = NUM2LONG(num);
|
|
RETURN_SIZED_ENUMERATOR(ary, 1, &num, rb_ary_combination_size);
|
|
len = RARRAY_LEN(ary);
|
|
if (n < 0 || len < n) {
|
|
/* yield nothing */
|
|
}
|
|
else if (n == 0) {
|
|
rb_yield(rb_ary_new2(0));
|
|
}
|
|
else if (n == 1) {
|
|
for (i = 0; i < len; i++) {
|
|
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
|
|
}
|
|
}
|
|
else {
|
|
volatile VALUE t0 = tmpbuf(n+1, sizeof(long));
|
|
long *stack = (long*)RSTRING_PTR(t0);
|
|
volatile VALUE cc = tmpary(n);
|
|
VALUE *chosen = RARRAY_PTR(cc);
|
|
long lev = 0;
|
|
|
|
MEMZERO(stack, long, n);
|
|
stack[0] = -1;
|
|
for (;;) {
|
|
chosen[lev] = RARRAY_PTR(ary)[stack[lev+1]];
|
|
for (lev++; lev < n; lev++) {
|
|
chosen[lev] = RARRAY_PTR(ary)[stack[lev+1] = stack[lev]+1];
|
|
}
|
|
rb_yield(rb_ary_new4(n, chosen));
|
|
if (RBASIC(t0)->klass) {
|
|
rb_raise(rb_eRuntimeError, "combination reentered");
|
|
}
|
|
do {
|
|
if (lev == 0) goto done;
|
|
stack[lev--]++;
|
|
} while (stack[lev+1]+n == len+lev+1);
|
|
}
|
|
done:
|
|
tmpbuf_discard(t0);
|
|
tmpary_discard(cc);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* Recursively compute repeated permutations of +r+ elements of the set
|
|
* <code>[0..n-1]</code>.
|
|
*
|
|
* When we have a complete repeated permutation of array indexes, copy the
|
|
* values at those indexes into a new array and yield that array.
|
|
*
|
|
* n: the size of the set
|
|
* r: the number of elements in each permutation
|
|
* p: the array (of size r) that we're filling in
|
|
* index: what index we're filling in now
|
|
* values: the Ruby array that holds the actual values to permute
|
|
*/
|
|
static void
|
|
rpermute0(long n, long r, long *p, long index, VALUE values)
|
|
{
|
|
long i, j;
|
|
for (i = 0; i < n; i++) {
|
|
p[index] = i;
|
|
if (index < r-1) { /* if not done yet */
|
|
rpermute0(n, r, p, index+1, values); /* recurse */
|
|
}
|
|
else {
|
|
/* We have a complete permutation of array indexes */
|
|
/* Build a ruby array of the corresponding values */
|
|
/* And yield it to the associated block */
|
|
VALUE result = rb_ary_new2(r);
|
|
VALUE *result_array = RARRAY_PTR(result);
|
|
const VALUE *values_array = RARRAY_PTR(values);
|
|
|
|
for (j = 0; j < r; j++) result_array[j] = values_array[p[j]];
|
|
ARY_SET_LEN(result, r);
|
|
rb_yield(result);
|
|
if (RBASIC(values)->klass) {
|
|
rb_raise(rb_eRuntimeError, "repeated permute reentered");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
rb_ary_repeated_permutation_size(VALUE ary, VALUE args)
|
|
{
|
|
long n = RARRAY_LEN(ary);
|
|
long k = NUM2LONG(RARRAY_PTR(args)[0]);
|
|
|
|
if (k < 0) {
|
|
return LONG2FIX(0);
|
|
}
|
|
|
|
return rb_funcall(LONG2NUM(n), id_power, 1, LONG2NUM(k));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.repeated_permutation(n) { |p| block } -> ary
|
|
* ary.repeated_permutation(n) -> Enumerator
|
|
*
|
|
* When invoked with a block, yield all repeated permutations of length +n+ of
|
|
* the elements of the array, then return the array itself.
|
|
*
|
|
* The implementation makes no guarantees about the order in which the repeated
|
|
* permutations are yielded.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* Examples:
|
|
*
|
|
* a = [1, 2]
|
|
* a.repeated_permutation(1).to_a #=> [[1], [2]]
|
|
* a.repeated_permutation(2).to_a #=> [[1,1],[1,2],[2,1],[2,2]]
|
|
* a.repeated_permutation(3).to_a #=> [[1,1,1],[1,1,2],[1,2,1],[1,2,2],
|
|
* # [2,1,1],[2,1,2],[2,2,1],[2,2,2]]
|
|
* a.repeated_permutation(0).to_a #=> [[]] # one permutation of length 0
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_repeated_permutation(VALUE ary, VALUE num)
|
|
{
|
|
long r, n, i;
|
|
|
|
n = RARRAY_LEN(ary); /* Array length */
|
|
RETURN_SIZED_ENUMERATOR(ary, 1, &num, rb_ary_repeated_permutation_size); /* Return Enumerator if no block */
|
|
r = NUM2LONG(num); /* Permutation size from argument */
|
|
|
|
if (r < 0) {
|
|
/* no permutations: yield nothing */
|
|
}
|
|
else if (r == 0) { /* exactly one permutation: the zero-length array */
|
|
rb_yield(rb_ary_new2(0));
|
|
}
|
|
else if (r == 1) { /* this is a special, easy case */
|
|
for (i = 0; i < RARRAY_LEN(ary); i++) {
|
|
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
|
|
}
|
|
}
|
|
else { /* this is the general case */
|
|
volatile VALUE t0 = tmpbuf(r, sizeof(long));
|
|
long *p = (long*)RSTRING_PTR(t0);
|
|
VALUE ary0 = ary_make_shared_copy(ary); /* private defensive copy of ary */
|
|
RBASIC(ary0)->klass = 0;
|
|
|
|
rpermute0(n, r, p, 0, ary0); /* compute and yield repeated permutations */
|
|
tmpbuf_discard(t0);
|
|
RBASIC(ary0)->klass = rb_cArray;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
static void
|
|
rcombinate0(long n, long r, long *p, long index, long rest, VALUE values)
|
|
{
|
|
long j;
|
|
if (rest > 0) {
|
|
for (; index < n; ++index) {
|
|
p[r-rest] = index;
|
|
rcombinate0(n, r, p, index, rest-1, values);
|
|
}
|
|
}
|
|
else {
|
|
VALUE result = rb_ary_new2(r);
|
|
VALUE *result_array = RARRAY_PTR(result);
|
|
const VALUE *values_array = RARRAY_PTR(values);
|
|
|
|
for (j = 0; j < r; ++j) result_array[j] = values_array[p[j]];
|
|
ARY_SET_LEN(result, r);
|
|
rb_yield(result);
|
|
if (RBASIC(values)->klass) {
|
|
rb_raise(rb_eRuntimeError, "repeated combination reentered");
|
|
}
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
rb_ary_repeated_combination_size(VALUE ary, VALUE args)
|
|
{
|
|
long n = RARRAY_LEN(ary);
|
|
long k = NUM2LONG(RARRAY_PTR(args)[0]);
|
|
if (k == 0) {
|
|
return LONG2FIX(1);
|
|
}
|
|
return binomial_coefficient(k, n + k - 1);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.repeated_combination(n) { |c| block } -> ary
|
|
* ary.repeated_combination(n) -> Enumerator
|
|
*
|
|
* When invoked with a block, yields all repeated combinations of length +n+ of
|
|
* elements from the array and then returns the array itself.
|
|
*
|
|
* The implementation makes no guarantees about the order in which the repeated
|
|
* combinations are yielded.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* Examples:
|
|
*
|
|
* a = [1, 2, 3]
|
|
* a.repeated_combination(1).to_a #=> [[1], [2], [3]]
|
|
* a.repeated_combination(2).to_a #=> [[1,1],[1,2],[1,3],[2,2],[2,3],[3,3]]
|
|
* a.repeated_combination(3).to_a #=> [[1,1,1],[1,1,2],[1,1,3],[1,2,2],[1,2,3],
|
|
* # [1,3,3],[2,2,2],[2,2,3],[2,3,3],[3,3,3]]
|
|
* a.repeated_combination(4).to_a #=> [[1,1,1,1],[1,1,1,2],[1,1,1,3],[1,1,2,2],[1,1,2,3],
|
|
* # [1,1,3,3],[1,2,2,2],[1,2,2,3],[1,2,3,3],[1,3,3,3],
|
|
* # [2,2,2,2],[2,2,2,3],[2,2,3,3],[2,3,3,3],[3,3,3,3]]
|
|
* a.repeated_combination(0).to_a #=> [[]] # one combination of length 0
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_repeated_combination(VALUE ary, VALUE num)
|
|
{
|
|
long n, i, len;
|
|
|
|
n = NUM2LONG(num); /* Combination size from argument */
|
|
RETURN_SIZED_ENUMERATOR(ary, 1, &num, rb_ary_repeated_combination_size); /* Return enumerator if no block */
|
|
len = RARRAY_LEN(ary);
|
|
if (n < 0) {
|
|
/* yield nothing */
|
|
}
|
|
else if (n == 0) {
|
|
rb_yield(rb_ary_new2(0));
|
|
}
|
|
else if (n == 1) {
|
|
for (i = 0; i < len; i++) {
|
|
rb_yield(rb_ary_new3(1, RARRAY_PTR(ary)[i]));
|
|
}
|
|
}
|
|
else if (len == 0) {
|
|
/* yield nothing */
|
|
}
|
|
else {
|
|
volatile VALUE t0 = tmpbuf(n, sizeof(long));
|
|
long *p = (long*)RSTRING_PTR(t0);
|
|
VALUE ary0 = ary_make_shared_copy(ary); /* private defensive copy of ary */
|
|
RBASIC(ary0)->klass = 0;
|
|
|
|
rcombinate0(len, n, p, 0, n, ary0); /* compute and yield repeated combinations */
|
|
tmpbuf_discard(t0);
|
|
RBASIC(ary0)->klass = rb_cArray;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.product(other_ary, ...) -> new_ary
|
|
* ary.product(other_ary, ...) { |p| block } -> ary
|
|
*
|
|
* Returns an array of all combinations of elements from all arrays.
|
|
*
|
|
* The length of the returned array is the product of the length of +self+ and
|
|
* the argument arrays.
|
|
*
|
|
* If given a block, #product will yield all combinations and return +self+
|
|
* instead.
|
|
*
|
|
* [1,2,3].product([4,5]) #=> [[1,4],[1,5],[2,4],[2,5],[3,4],[3,5]]
|
|
* [1,2].product([1,2]) #=> [[1,1],[1,2],[2,1],[2,2]]
|
|
* [1,2].product([3,4],[5,6]) #=> [[1,3,5],[1,3,6],[1,4,5],[1,4,6],
|
|
* # [2,3,5],[2,3,6],[2,4,5],[2,4,6]]
|
|
* [1,2].product() #=> [[1],[2]]
|
|
* [1,2].product([]) #=> []
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_product(int argc, VALUE *argv, VALUE ary)
|
|
{
|
|
int n = argc+1; /* How many arrays we're operating on */
|
|
volatile VALUE t0 = tmpary(n);
|
|
volatile VALUE t1 = tmpbuf(n, sizeof(int));
|
|
VALUE *arrays = RARRAY_PTR(t0); /* The arrays we're computing the product of */
|
|
int *counters = (int*)RSTRING_PTR(t1); /* The current position in each one */
|
|
VALUE result = Qnil; /* The array we'll be returning, when no block given */
|
|
long i,j;
|
|
long resultlen = 1;
|
|
|
|
RBASIC(t0)->klass = 0;
|
|
RBASIC(t1)->klass = 0;
|
|
|
|
/* initialize the arrays of arrays */
|
|
ARY_SET_LEN(t0, n);
|
|
arrays[0] = ary;
|
|
for (i = 1; i < n; i++) arrays[i] = Qnil;
|
|
for (i = 1; i < n; i++) arrays[i] = to_ary(argv[i-1]);
|
|
|
|
/* initialize the counters for the arrays */
|
|
for (i = 0; i < n; i++) counters[i] = 0;
|
|
|
|
/* Otherwise, allocate and fill in an array of results */
|
|
if (rb_block_given_p()) {
|
|
/* Make defensive copies of arrays; exit if any is empty */
|
|
for (i = 0; i < n; i++) {
|
|
if (RARRAY_LEN(arrays[i]) == 0) goto done;
|
|
arrays[i] = ary_make_shared_copy(arrays[i]);
|
|
}
|
|
}
|
|
else {
|
|
/* Compute the length of the result array; return [] if any is empty */
|
|
for (i = 0; i < n; i++) {
|
|
long k = RARRAY_LEN(arrays[i]);
|
|
if (k == 0) {
|
|
result = rb_ary_new2(0);
|
|
goto done;
|
|
}
|
|
if (MUL_OVERFLOW_LONG_P(resultlen, k))
|
|
rb_raise(rb_eRangeError, "too big to product");
|
|
resultlen *= k;
|
|
}
|
|
result = rb_ary_new2(resultlen);
|
|
}
|
|
for (;;) {
|
|
int m;
|
|
/* fill in one subarray */
|
|
VALUE subarray = rb_ary_new2(n);
|
|
for (j = 0; j < n; j++) {
|
|
rb_ary_push(subarray, rb_ary_entry(arrays[j], counters[j]));
|
|
}
|
|
|
|
/* put it on the result array */
|
|
if (NIL_P(result)) {
|
|
FL_SET(t0, FL_USER5);
|
|
rb_yield(subarray);
|
|
if (! FL_TEST(t0, FL_USER5)) {
|
|
rb_raise(rb_eRuntimeError, "product reentered");
|
|
}
|
|
else {
|
|
FL_UNSET(t0, FL_USER5);
|
|
}
|
|
}
|
|
else {
|
|
rb_ary_push(result, subarray);
|
|
}
|
|
|
|
/*
|
|
* Increment the last counter. If it overflows, reset to 0
|
|
* and increment the one before it.
|
|
*/
|
|
m = n-1;
|
|
counters[m]++;
|
|
while (counters[m] == RARRAY_LEN(arrays[m])) {
|
|
counters[m] = 0;
|
|
/* If the first counter overflows, we are done */
|
|
if (--m < 0) goto done;
|
|
counters[m]++;
|
|
}
|
|
}
|
|
done:
|
|
tmpary_discard(t0);
|
|
tmpbuf_discard(t1);
|
|
|
|
return NIL_P(result) ? ary : result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.take(n) -> new_ary
|
|
*
|
|
* Returns first +n+ elements from the array.
|
|
*
|
|
* If a negative number is given, raises an ArgumentError.
|
|
*
|
|
* See also Array#drop
|
|
*
|
|
* a = [1, 2, 3, 4, 5, 0]
|
|
* a.take(3) #=> [1, 2, 3]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_take(VALUE obj, VALUE n)
|
|
{
|
|
long len = NUM2LONG(n);
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "attempt to take negative size");
|
|
}
|
|
return rb_ary_subseq(obj, 0, len);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.take_while { |arr| block } -> new_ary
|
|
* ary.take_while -> Enumerator
|
|
*
|
|
* Passes elements to the block until the block returns +nil+ or +false+, then
|
|
* stops iterating and returns an array of all prior elements.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* See also Array#drop_while
|
|
*
|
|
* a = [1, 2, 3, 4, 5, 0]
|
|
* a.take_while { |i| i < 3 } #=> [1, 2]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_take_while(VALUE ary)
|
|
{
|
|
long i;
|
|
|
|
RETURN_ENUMERATOR(ary, 0, 0);
|
|
for (i = 0; i < RARRAY_LEN(ary); i++) {
|
|
if (!RTEST(rb_yield(RARRAY_PTR(ary)[i]))) break;
|
|
}
|
|
return rb_ary_take(ary, LONG2FIX(i));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.drop(n) -> new_ary
|
|
*
|
|
* Drops first +n+ elements from +ary+ and returns the rest of the elements in
|
|
* an array.
|
|
*
|
|
* If a negative number is given, raises an ArgumentError.
|
|
*
|
|
* See also Array#take
|
|
*
|
|
* a = [1, 2, 3, 4, 5, 0]
|
|
* a.drop(3) #=> [4, 5, 0]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_drop(VALUE ary, VALUE n)
|
|
{
|
|
VALUE result;
|
|
long pos = NUM2LONG(n);
|
|
if (pos < 0) {
|
|
rb_raise(rb_eArgError, "attempt to drop negative size");
|
|
}
|
|
|
|
result = rb_ary_subseq(ary, pos, RARRAY_LEN(ary));
|
|
if (result == Qnil) result = rb_ary_new();
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ary.drop_while { |arr| block } -> new_ary
|
|
* ary.drop_while -> Enumerator
|
|
*
|
|
* Drops elements up to, but not including, the first element for which the
|
|
* block returns +nil+ or +false+ and returns an array containing the
|
|
* remaining elements.
|
|
*
|
|
* If no block is given, an Enumerator is returned instead.
|
|
*
|
|
* See also Array#take_while
|
|
*
|
|
* a = [1, 2, 3, 4, 5, 0]
|
|
* a.drop_while {|i| i < 3 } #=> [3, 4, 5, 0]
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
rb_ary_drop_while(VALUE ary)
|
|
{
|
|
long i;
|
|
|
|
RETURN_ENUMERATOR(ary, 0, 0);
|
|
for (i = 0; i < RARRAY_LEN(ary); i++) {
|
|
if (!RTEST(rb_yield(RARRAY_PTR(ary)[i]))) break;
|
|
}
|
|
return rb_ary_drop(ary, LONG2FIX(i));
|
|
}
|
|
|
|
/*
|
|
* Arrays are ordered, integer-indexed collections of any object.
|
|
*
|
|
* Array indexing starts at 0, as in C or Java. A negative index is assumed
|
|
* to be relative to the end of the array---that is, an index of -1 indicates
|
|
* the last element of the array, -2 is the next to last element in the
|
|
* array, and so on.
|
|
*
|
|
* == Creating Arrays
|
|
*
|
|
* A new array can be created by using the literal constructor
|
|
* <code>[]</code>. Arrays can contain different types of objects. For
|
|
* example, the array below contains an Integer, a String and a Float:
|
|
*
|
|
* ary = [1, "two", 3.0] #=> [1, "two", 3.0]
|
|
*
|
|
* An array can also be created by explicitly calling Array.new with zero, one
|
|
* (the initial size of the Array) or two arguments (the initial size and a
|
|
* default object).
|
|
*
|
|
* ary = Array.new #=> []
|
|
* Array.new(3) #=> [nil, nil, nil]
|
|
* Array.new(3, true) #=> [true, true, true]
|
|
*
|
|
* Note that the second argument populates the array with references to the
|
|
* same object. Therefore, it is only recommended in cases when you need to
|
|
* instantiate arrays with natively immutable objects such as Symbols,
|
|
* numbers, true or false.
|
|
*
|
|
* To create an array with separate objects a block can be passed instead.
|
|
* This method is safe to use with mutable objects such as hashes, strings or
|
|
* other arrays:
|
|
*
|
|
* Array.new(4) { Hash.new } #=> [{}, {}, {}, {}]
|
|
*
|
|
* This is also a quick way to build up multi-dimensional arrays:
|
|
*
|
|
* empty_table = Array.new(3) { Array.new(3) }
|
|
* #=> [[nil, nil, nil], [nil, nil, nil], [nil, nil, nil]]
|
|
*
|
|
* An array can also be created by using the Array() method, provided by
|
|
* Kernel, which tries to call #to_ary, then #to_a on its argument.
|
|
*
|
|
* Array({:a => "a", :b => "b"}) #=> [[:a, "a"], [:b, "b"]]
|
|
*
|
|
* == Example Usage
|
|
*
|
|
* In addition to the methods it mixes in through the Enumerable module, the
|
|
* Array class has proprietary methods for accessing, searching and otherwise
|
|
* manipulating arrays.
|
|
*
|
|
* Some of the more common ones are illustrated below.
|
|
*
|
|
* == Accessing Elements
|
|
*
|
|
* Elements in an array can be retrieved using the Array#[] method. It can
|
|
* take a single integer argument (a numeric index), a pair of arguments
|
|
* (start and length) or a range.
|
|
*
|
|
* arr = [1, 2, 3, 4, 5, 6]
|
|
* arr[2] #=> 3
|
|
* arr[100] #=> nil
|
|
* arr[-3] #=> 4
|
|
* arr[2, 3] #=> [3, 4, 5]
|
|
* arr[1..4] #=> [2, 3, 4, 5]
|
|
*
|
|
* Another way to access a particular array element is by using the #at method
|
|
*
|
|
* arr.at(0) #=> 1
|
|
*
|
|
* The #slice method works in an identical manner to Array#[].
|
|
*
|
|
* To raise an error for indices outside of the array bounds or else to
|
|
* provide a default value when that happens, you can use #fetch.
|
|
*
|
|
* arr = ['a', 'b', 'c', 'd', 'e', 'f']
|
|
* arr.fetch(100) #=> IndexError: index 100 outside of array bounds: -6...6
|
|
* arr.fetch(100, "oops") #=> "oops"
|
|
*
|
|
* The special methods #first and #last will return the first and last
|
|
* elements of an array, respectively.
|
|
*
|
|
* arr.first #=> 1
|
|
* arr.last #=> 6
|
|
*
|
|
* To return the first +n+ elements of an array, use #take
|
|
*
|
|
* arr.take(3) #=> [1, 2, 3]
|
|
*
|
|
* #drop does the opposite of #take, by returning the elements after +n+
|
|
* elements have been dropped:
|
|
*
|
|
* arr.drop(3) #=> [4, 5, 6]
|
|
*
|
|
* == Obtaining Information about an Array
|
|
*
|
|
* Arrays keep track of their own length at all times. To query an array
|
|
* about the number of elements it contains, use #length, #count or #size.
|
|
*
|
|
* browsers = ['Chrome', 'Firefox', 'Safari', 'Opera', 'IE']
|
|
* browsers.length #=> 5
|
|
* browsers.count #=> 5
|
|
*
|
|
* To check whether an array contains any elements at all
|
|
*
|
|
* browsers.empty? #=> false
|
|
*
|
|
* To check whether a particular item is included in the array
|
|
*
|
|
* browsers.include?('Konqueror') #=> false
|
|
*
|
|
* == Adding Items to Arrays
|
|
*
|
|
* Items can be added to the end of an array by using either #push or #<<
|
|
*
|
|
* arr = [1, 2, 3, 4]
|
|
* arr.push(5) #=> [1, 2, 3, 4, 5]
|
|
* arr << 6 #=> [1, 2, 3, 4, 5, 6]
|
|
*
|
|
* #unshift will add a new item to the beginning of an array.
|
|
*
|
|
* arr.unshift(0) #=> [0, 1, 2, 3, 4, 5, 6]
|
|
*
|
|
* With #insert you can add a new element to an array at any position.
|
|
*
|
|
* arr.insert(3, 'apple') #=> [0, 1, 2, 'apple', 3, 4, 5, 6]
|
|
*
|
|
* Using the #insert method, you can also insert multiple values at once:
|
|
*
|
|
* arr.insert(3, 'orange', 'pear', 'grapefruit')
|
|
* #=> [0, 1, 2, "orange", "pear", "grapefruit", "apple", 3, 4, 5, 6]
|
|
*
|
|
* == Removing Items from an Array
|
|
*
|
|
* The method #pop removes the last element in an array and returns it:
|
|
*
|
|
* arr = [1, 2, 3, 4, 5, 6]
|
|
* arr.pop #=> 6
|
|
* arr #=> [1, 2, 3, 4, 5]
|
|
*
|
|
* To retrieve and at the same time remove the first item, use #shift:
|
|
*
|
|
* arr.shift #=> 1
|
|
* arr #=> [2, 3, 4, 5]
|
|
*
|
|
* To delete an element at a particular index:
|
|
*
|
|
* arr.delete_at(2) #=> 4
|
|
* arr #=> [2, 3, 5]
|
|
*
|
|
* To delete a particular element anywhere in an array, use #delete:
|
|
*
|
|
* arr = [1, 2, 2, 3]
|
|
* arr.delete(2) #=> 2
|
|
* arr #=> [1,3]
|
|
*
|
|
* A useful method if you need to remove +nil+ values from an array is
|
|
* #compact:
|
|
*
|
|
* arr = ['foo', 0, nil, 'bar', 7, 'baz', nil]
|
|
* arr.compact #=> ['foo', 0, 'bar', 7, 'baz']
|
|
* arr #=> ['foo', 0, nil, 'bar', 7, 'baz', nil]
|
|
* arr.compact! #=> ['foo', 0, 'bar', 7, 'baz']
|
|
* arr #=> ['foo', 0, 'bar', 7, 'baz']
|
|
*
|
|
* Another common need is to remove duplicate elements from an array.
|
|
*
|
|
* It has the non-destructive #uniq, and destructive method #uniq!
|
|
*
|
|
* arr = [2, 5, 6, 556, 6, 6, 8, 9, 0, 123, 556]
|
|
* arr.uniq #=> [2, 5, 6, 556, 8, 9, 0, 123]
|
|
*
|
|
* == Iterating over Arrays
|
|
*
|
|
* Like all classes that include the Enumerable module, Array has an each
|
|
* method, which defines what elements should be iterated over and how. In
|
|
* case of Array's #each, all elements in the Array instance are yielded to
|
|
* the supplied block in sequence.
|
|
*
|
|
* Note that this operation leaves the array unchanged.
|
|
*
|
|
* arr = [1, 2, 3, 4, 5]
|
|
* arr.each { |a| print a -= 10, " " }
|
|
* # prints: -9 -8 -7 -6 -5
|
|
* #=> [1, 2, 3, 4, 5]
|
|
*
|
|
* Another sometimes useful iterator is #reverse_each which will iterate over
|
|
* the elements in the array in reverse order.
|
|
*
|
|
* words = %w[rats live on no evil star]
|
|
* str = ""
|
|
* words.reverse_each { |word| str += "#{word.reverse} " }
|
|
* str #=> "rats live on no evil star "
|
|
*
|
|
* The #map method can be used to create a new array based on the original
|
|
* array, but with the values modified by the supplied block:
|
|
*
|
|
* arr.map { |a| 2*a } #=> [2, 4, 6, 8, 10]
|
|
* arr #=> [1, 2, 3, 4, 5]
|
|
* arr.map! { |a| a**2 } #=> [1, 4, 9, 16, 25]
|
|
* arr #=> [1, 4, 9, 16, 25]
|
|
*
|
|
* == Selecting Items from an Array
|
|
*
|
|
* Elements can be selected from an array according to criteria defined in a
|
|
* block. The selection can happen in a destructive or a non-destructive
|
|
* manner. While the destructive operations will modify the array they were
|
|
* called on, the non-destructive methods usually return a new array with the
|
|
* selected elements, but leave the original array unchanged.
|
|
*
|
|
* === Non-destructive Selection
|
|
*
|
|
* arr = [1, 2, 3, 4, 5, 6]
|
|
* arr.select { |a| a > 3 } #=> [4, 5, 6]
|
|
* arr.reject { |a| a < 3 } #=> [4, 5, 6]
|
|
* arr.drop_while { |a| a < 4 } #=> [4, 5, 6]
|
|
* arr #=> [1, 2, 3, 4, 5, 6]
|
|
*
|
|
* === Destructive Selection
|
|
*
|
|
* #select! and #reject! are the corresponding destructive methods to #select
|
|
* and #reject
|
|
*
|
|
* Similar to #select vs. #reject, #delete_if and #keep_if have the exact
|
|
* opposite result when supplied with the same block:
|
|
*
|
|
* arr.delete_if { |a| a < 4 } #=> [4, 5, 6]
|
|
* arr #=> [4, 5, 6]
|
|
*
|
|
* arr = [1, 2, 3, 4, 5, 6]
|
|
* arr.keep_if { |a| a < 4 } #=> [1, 2, 3]
|
|
* arr #=> [1, 2, 3]
|
|
*
|
|
*/
|
|
|
|
void
|
|
Init_Array(void)
|
|
{
|
|
#undef rb_intern
|
|
#define rb_intern(str) rb_intern_const(str)
|
|
|
|
rb_cArray = rb_define_class("Array", rb_cObject);
|
|
rb_include_module(rb_cArray, rb_mEnumerable);
|
|
|
|
rb_define_alloc_func(rb_cArray, empty_ary_alloc);
|
|
rb_define_singleton_method(rb_cArray, "[]", rb_ary_s_create, -1);
|
|
rb_define_singleton_method(rb_cArray, "try_convert", rb_ary_s_try_convert, 1);
|
|
rb_define_method(rb_cArray, "initialize", rb_ary_initialize, -1);
|
|
rb_define_method(rb_cArray, "initialize_copy", rb_ary_replace, 1);
|
|
|
|
rb_define_method(rb_cArray, "inspect", rb_ary_inspect, 0);
|
|
rb_define_alias(rb_cArray, "to_s", "inspect");
|
|
rb_define_method(rb_cArray, "to_a", rb_ary_to_a, 0);
|
|
rb_define_method(rb_cArray, "to_ary", rb_ary_to_ary_m, 0);
|
|
rb_define_method(rb_cArray, "frozen?", rb_ary_frozen_p, 0);
|
|
|
|
rb_define_method(rb_cArray, "==", rb_ary_equal, 1);
|
|
rb_define_method(rb_cArray, "eql?", rb_ary_eql, 1);
|
|
rb_define_method(rb_cArray, "hash", rb_ary_hash, 0);
|
|
|
|
rb_define_method(rb_cArray, "[]", rb_ary_aref, -1);
|
|
rb_define_method(rb_cArray, "[]=", rb_ary_aset, -1);
|
|
rb_define_method(rb_cArray, "at", rb_ary_at, 1);
|
|
rb_define_method(rb_cArray, "fetch", rb_ary_fetch, -1);
|
|
rb_define_method(rb_cArray, "first", rb_ary_first, -1);
|
|
rb_define_method(rb_cArray, "last", rb_ary_last, -1);
|
|
rb_define_method(rb_cArray, "concat", rb_ary_concat, 1);
|
|
rb_define_method(rb_cArray, "<<", rb_ary_push, 1);
|
|
rb_define_method(rb_cArray, "push", rb_ary_push_m, -1);
|
|
rb_define_method(rb_cArray, "pop", rb_ary_pop_m, -1);
|
|
rb_define_method(rb_cArray, "shift", rb_ary_shift_m, -1);
|
|
rb_define_method(rb_cArray, "unshift", rb_ary_unshift_m, -1);
|
|
rb_define_method(rb_cArray, "insert", rb_ary_insert, -1);
|
|
rb_define_method(rb_cArray, "each", rb_ary_each, 0);
|
|
rb_define_method(rb_cArray, "each_index", rb_ary_each_index, 0);
|
|
rb_define_method(rb_cArray, "reverse_each", rb_ary_reverse_each, 0);
|
|
rb_define_method(rb_cArray, "length", rb_ary_length, 0);
|
|
rb_define_alias(rb_cArray, "size", "length");
|
|
rb_define_method(rb_cArray, "empty?", rb_ary_empty_p, 0);
|
|
rb_define_method(rb_cArray, "find_index", rb_ary_index, -1);
|
|
rb_define_method(rb_cArray, "index", rb_ary_index, -1);
|
|
rb_define_method(rb_cArray, "rindex", rb_ary_rindex, -1);
|
|
rb_define_method(rb_cArray, "join", rb_ary_join_m, -1);
|
|
rb_define_method(rb_cArray, "reverse", rb_ary_reverse_m, 0);
|
|
rb_define_method(rb_cArray, "reverse!", rb_ary_reverse_bang, 0);
|
|
rb_define_method(rb_cArray, "rotate", rb_ary_rotate_m, -1);
|
|
rb_define_method(rb_cArray, "rotate!", rb_ary_rotate_bang, -1);
|
|
rb_define_method(rb_cArray, "sort", rb_ary_sort, 0);
|
|
rb_define_method(rb_cArray, "sort!", rb_ary_sort_bang, 0);
|
|
rb_define_method(rb_cArray, "sort_by!", rb_ary_sort_by_bang, 0);
|
|
rb_define_method(rb_cArray, "collect", rb_ary_collect, 0);
|
|
rb_define_method(rb_cArray, "collect!", rb_ary_collect_bang, 0);
|
|
rb_define_method(rb_cArray, "map", rb_ary_collect, 0);
|
|
rb_define_method(rb_cArray, "map!", rb_ary_collect_bang, 0);
|
|
rb_define_method(rb_cArray, "select", rb_ary_select, 0);
|
|
rb_define_method(rb_cArray, "select!", rb_ary_select_bang, 0);
|
|
rb_define_method(rb_cArray, "keep_if", rb_ary_keep_if, 0);
|
|
rb_define_method(rb_cArray, "values_at", rb_ary_values_at, -1);
|
|
rb_define_method(rb_cArray, "delete", rb_ary_delete, 1);
|
|
rb_define_method(rb_cArray, "delete_at", rb_ary_delete_at_m, 1);
|
|
rb_define_method(rb_cArray, "delete_if", rb_ary_delete_if, 0);
|
|
rb_define_method(rb_cArray, "reject", rb_ary_reject, 0);
|
|
rb_define_method(rb_cArray, "reject!", rb_ary_reject_bang, 0);
|
|
rb_define_method(rb_cArray, "zip", rb_ary_zip, -1);
|
|
rb_define_method(rb_cArray, "transpose", rb_ary_transpose, 0);
|
|
rb_define_method(rb_cArray, "replace", rb_ary_replace, 1);
|
|
rb_define_method(rb_cArray, "clear", rb_ary_clear, 0);
|
|
rb_define_method(rb_cArray, "fill", rb_ary_fill, -1);
|
|
rb_define_method(rb_cArray, "include?", rb_ary_includes, 1);
|
|
rb_define_method(rb_cArray, "<=>", rb_ary_cmp, 1);
|
|
|
|
rb_define_method(rb_cArray, "slice", rb_ary_aref, -1);
|
|
rb_define_method(rb_cArray, "slice!", rb_ary_slice_bang, -1);
|
|
|
|
rb_define_method(rb_cArray, "assoc", rb_ary_assoc, 1);
|
|
rb_define_method(rb_cArray, "rassoc", rb_ary_rassoc, 1);
|
|
|
|
rb_define_method(rb_cArray, "+", rb_ary_plus, 1);
|
|
rb_define_method(rb_cArray, "*", rb_ary_times, 1);
|
|
|
|
rb_define_method(rb_cArray, "-", rb_ary_diff, 1);
|
|
rb_define_method(rb_cArray, "&", rb_ary_and, 1);
|
|
rb_define_method(rb_cArray, "|", rb_ary_or, 1);
|
|
|
|
rb_define_method(rb_cArray, "uniq", rb_ary_uniq, 0);
|
|
rb_define_method(rb_cArray, "uniq!", rb_ary_uniq_bang, 0);
|
|
rb_define_method(rb_cArray, "compact", rb_ary_compact, 0);
|
|
rb_define_method(rb_cArray, "compact!", rb_ary_compact_bang, 0);
|
|
rb_define_method(rb_cArray, "flatten", rb_ary_flatten, -1);
|
|
rb_define_method(rb_cArray, "flatten!", rb_ary_flatten_bang, -1);
|
|
rb_define_method(rb_cArray, "count", rb_ary_count, -1);
|
|
rb_define_method(rb_cArray, "shuffle!", rb_ary_shuffle_bang, -1);
|
|
rb_define_method(rb_cArray, "shuffle", rb_ary_shuffle, -1);
|
|
rb_define_method(rb_cArray, "sample", rb_ary_sample, -1);
|
|
rb_define_method(rb_cArray, "cycle", rb_ary_cycle, -1);
|
|
rb_define_method(rb_cArray, "permutation", rb_ary_permutation, -1);
|
|
rb_define_method(rb_cArray, "combination", rb_ary_combination, 1);
|
|
rb_define_method(rb_cArray, "repeated_permutation", rb_ary_repeated_permutation, 1);
|
|
rb_define_method(rb_cArray, "repeated_combination", rb_ary_repeated_combination, 1);
|
|
rb_define_method(rb_cArray, "product", rb_ary_product, -1);
|
|
|
|
rb_define_method(rb_cArray, "take", rb_ary_take, 1);
|
|
rb_define_method(rb_cArray, "take_while", rb_ary_take_while, 0);
|
|
rb_define_method(rb_cArray, "drop", rb_ary_drop, 1);
|
|
rb_define_method(rb_cArray, "drop_while", rb_ary_drop_while, 0);
|
|
rb_define_method(rb_cArray, "bsearch", rb_ary_bsearch, 0);
|
|
|
|
id_cmp = rb_intern("<=>");
|
|
sym_random = ID2SYM(rb_intern("random"));
|
|
id_div = rb_intern("div");
|
|
id_power = rb_intern("**");
|
|
}
|