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39802186b2
pushing back behind the beginning of the pseudo stream. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25987 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
1434 lines
31 KiB
C
1434 lines
31 KiB
C
/**********************************************************************
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stringio.c -
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$Author$
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$RoughId: stringio.c,v 1.13 2002/03/14 03:24:18 nobu Exp $
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created at: Tue Feb 19 04:10:38 JST 2002
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All the files in this distribution are covered under the Ruby's
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license (see the file COPYING).
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**********************************************************************/
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#include "ruby.h"
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#include "ruby/io.h"
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#include "ruby/encoding.h"
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#if defined(HAVE_FCNTL_H) || defined(_WIN32)
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#include <fcntl.h>
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#elif defined(HAVE_SYS_FCNTL_H)
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#include <sys/fcntl.h>
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#endif
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struct StringIO {
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VALUE string;
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long pos;
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long lineno;
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int flags;
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int count;
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};
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static void strio_init(int, VALUE *, struct StringIO *);
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#define IS_STRIO(obj) (rb_typeddata_is_kind_of(obj, &strio_data_type))
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#define error_inval(msg) (errno = EINVAL, rb_sys_fail(msg))
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static struct StringIO *
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strio_alloc(void)
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{
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struct StringIO *ptr = ALLOC(struct StringIO);
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ptr->string = Qnil;
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ptr->pos = 0;
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ptr->lineno = 0;
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ptr->flags = 0;
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ptr->count = 1;
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return ptr;
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}
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static void
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strio_mark(void *p)
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{
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struct StringIO *ptr = p;
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if (ptr) {
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rb_gc_mark(ptr->string);
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}
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}
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static void
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strio_free(void *p)
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{
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struct StringIO *ptr = p;
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if (--ptr->count <= 0) {
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xfree(ptr);
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}
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}
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static size_t
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strio_memsize(const void *p)
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{
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const struct StringIO *ptr = p;
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if (!ptr) return 0;
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return sizeof(struct StringIO);
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}
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static const rb_data_type_t strio_data_type = {
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"strio",
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strio_mark,
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strio_free,
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strio_memsize,
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};
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#define check_strio(self) ((struct StringIO*)rb_check_typeddata(self, &strio_data_type))
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static struct StringIO*
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get_strio(VALUE self)
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{
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struct StringIO *ptr = check_strio(self);
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if (!ptr) {
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rb_raise(rb_eIOError, "uninitialized stream");
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}
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return ptr;
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}
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static VALUE
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strio_substr(struct StringIO *ptr, long pos, long len)
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{
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VALUE str = ptr->string;
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rb_encoding *enc = rb_enc_get(str);
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long rlen = RSTRING_LEN(str) - pos;
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if (len > rlen) len = rlen;
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if (len < 0) len = 0;
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return rb_enc_str_new(RSTRING_PTR(str)+pos, len, enc);
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}
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#define StringIO(obj) get_strio(obj)
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#define CLOSED(ptr) (!((ptr)->flags & FMODE_READWRITE))
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#define READABLE(ptr) ((ptr)->flags & FMODE_READABLE)
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#define WRITABLE(ptr) ((ptr)->flags & FMODE_WRITABLE)
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static struct StringIO*
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readable(struct StringIO *ptr)
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{
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if (!READABLE(ptr)) {
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rb_raise(rb_eIOError, "not opened for reading");
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}
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return ptr;
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}
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static struct StringIO*
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writable(struct StringIO *ptr)
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{
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if (!WRITABLE(ptr)) {
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rb_raise(rb_eIOError, "not opened for writing");
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}
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if (!OBJ_TAINTED(ptr->string)) {
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rb_secure(4);
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}
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return ptr;
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}
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static void
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check_modifiable(struct StringIO *ptr)
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{
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if (OBJ_FROZEN(ptr->string)) {
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rb_raise(rb_eIOError, "not modifiable string");
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}
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}
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static VALUE
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strio_s_allocate(VALUE klass)
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{
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return TypedData_Wrap_Struct(klass, &strio_data_type, 0);
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}
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/*
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* call-seq: StringIO.new(string=""[, mode])
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*
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* Creates new StringIO instance from with _string_ and _mode_.
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*/
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static VALUE
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strio_initialize(int argc, VALUE *argv, VALUE self)
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{
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struct StringIO *ptr = check_strio(self);
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if (!ptr) {
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DATA_PTR(self) = ptr = strio_alloc();
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}
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rb_call_super(0, 0);
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strio_init(argc, argv, ptr);
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return self;
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}
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static void
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strio_init(int argc, VALUE *argv, struct StringIO *ptr)
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{
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VALUE string, mode;
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int trunc = 0;
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switch (rb_scan_args(argc, argv, "02", &string, &mode)) {
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case 2:
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if (FIXNUM_P(mode)) {
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int flags = FIX2INT(mode);
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ptr->flags = rb_io_modenum_flags(flags);
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trunc = flags & O_TRUNC;
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}
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else {
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const char *m = StringValueCStr(mode);
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ptr->flags = rb_io_mode_flags(m);
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trunc = *m == 'w';
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}
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StringValue(string);
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if ((ptr->flags & FMODE_WRITABLE) && OBJ_FROZEN(string)) {
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errno = EACCES;
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rb_sys_fail(0);
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}
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if (trunc) {
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rb_str_resize(string, 0);
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}
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break;
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case 1:
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StringValue(string);
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ptr->flags = OBJ_FROZEN(string) ? FMODE_READABLE : FMODE_READWRITE;
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break;
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case 0:
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string = rb_enc_str_new("", 0, rb_default_external_encoding());
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ptr->flags = FMODE_READWRITE;
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break;
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}
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ptr->string = string;
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ptr->pos = 0;
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ptr->lineno = 0;
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}
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static VALUE
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strio_finalize(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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ptr->string = Qnil;
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ptr->flags &= ~FMODE_READWRITE;
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return self;
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}
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/*
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* call-seq: StringIO.open(string=""[, mode]) {|strio| ...}
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*
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* Equivalent to StringIO.new except that when it is called with a block, it
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* yields with the new instance and closes it, and returns the result which
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* returned from the block.
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*/
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static VALUE
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strio_s_open(int argc, VALUE *argv, VALUE klass)
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{
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VALUE obj = rb_class_new_instance(argc, argv, klass);
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if (!rb_block_given_p()) return obj;
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return rb_ensure(rb_yield, obj, strio_finalize, obj);
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}
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/*
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* Returns +false+. Just for compatibility to IO.
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*/
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static VALUE
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strio_false(VALUE self)
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{
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StringIO(self);
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return Qfalse;
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}
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/*
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* Returns +nil+. Just for compatibility to IO.
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*/
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static VALUE
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strio_nil(VALUE self)
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{
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StringIO(self);
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return Qnil;
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}
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/*
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* Returns *strio* itself. Just for compatibility to IO.
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*/
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static VALUE
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strio_self(VALUE self)
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{
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StringIO(self);
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return self;
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}
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/*
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* Returns 0. Just for compatibility to IO.
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*/
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static VALUE
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strio_0(VALUE self)
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{
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StringIO(self);
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return INT2FIX(0);
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}
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/*
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* Returns the argument unchanged. Just for compatibility to IO.
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*/
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static VALUE
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strio_first(VALUE self, VALUE arg)
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{
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StringIO(self);
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return arg;
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}
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/*
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* Raises NotImplementedError.
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*/
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static VALUE
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strio_unimpl(int argc, VALUE *argv, VALUE self)
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{
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StringIO(self);
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rb_notimplement();
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return Qnil; /* not reached */
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}
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/*
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* call-seq: strio.string -> string
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*
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* Returns underlying String object, the subject of IO.
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*/
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static VALUE
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strio_get_string(VALUE self)
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{
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return StringIO(self)->string;
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}
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/*
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* call-seq:
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* strio.string = string -> string
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*
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* Changes underlying String object, the subject of IO.
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*/
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static VALUE
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strio_set_string(VALUE self, VALUE string)
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{
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struct StringIO *ptr = StringIO(self);
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if (!OBJ_TAINTED(self)) rb_secure(4);
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ptr->flags &= ~FMODE_READWRITE;
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StringValue(string);
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ptr->flags = OBJ_FROZEN(string) ? FMODE_READABLE : FMODE_READWRITE;
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ptr->pos = 0;
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ptr->lineno = 0;
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return ptr->string = string;
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}
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/*
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* call-seq:
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* strio.close -> nil
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*
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* Closes strio. The *strio* is unavailable for any further data
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* operations; an +IOError+ is raised if such an attempt is made.
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*/
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static VALUE
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strio_close(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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if (CLOSED(ptr)) {
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rb_raise(rb_eIOError, "closed stream");
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}
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ptr->flags &= ~FMODE_READWRITE;
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return Qnil;
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}
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/*
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* call-seq:
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* strio.close_read -> nil
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*
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* Closes the read end of a StringIO. Will raise an +IOError+ if the
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* *strio* is not readable.
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*/
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static VALUE
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strio_close_read(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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if (!READABLE(ptr)) {
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rb_raise(rb_eIOError, "closing non-duplex IO for reading");
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}
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ptr->flags &= ~FMODE_READABLE;
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return Qnil;
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}
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/*
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* call-seq:
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* strio.close_write -> nil
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*
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* Closes the write end of a StringIO. Will raise an +IOError+ if the
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* *strio* is not writeable.
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*/
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static VALUE
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strio_close_write(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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if (!WRITABLE(ptr)) {
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rb_raise(rb_eIOError, "closing non-duplex IO for writing");
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}
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ptr->flags &= ~FMODE_WRITABLE;
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return Qnil;
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}
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/*
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* call-seq:
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* strio.closed? -> true or false
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*
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* Returns +true+ if *strio* is completely closed, +false+ otherwise.
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*/
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static VALUE
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strio_closed(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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if (!CLOSED(ptr)) return Qfalse;
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return Qtrue;
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}
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/*
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* call-seq:
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* strio.closed_read? -> true or false
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*
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* Returns +true+ if *strio* is not readable, +false+ otherwise.
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*/
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static VALUE
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strio_closed_read(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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if (READABLE(ptr)) return Qfalse;
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return Qtrue;
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}
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/*
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* call-seq:
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* strio.closed_write? -> true or false
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*
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* Returns +true+ if *strio* is not writable, +false+ otherwise.
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*/
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static VALUE
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strio_closed_write(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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if (WRITABLE(ptr)) return Qfalse;
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return Qtrue;
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}
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/*
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* call-seq:
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* strio.eof -> true or false
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* strio.eof? -> true or false
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*
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* Returns true if *strio* is at end of file. The stringio must be
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* opened for reading or an +IOError+ will be raised.
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*/
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static VALUE
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strio_eof(VALUE self)
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{
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struct StringIO *ptr = readable(StringIO(self));
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if (ptr->pos < RSTRING_LEN(ptr->string)) return Qfalse;
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return Qtrue;
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}
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/* :nodoc: */
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static VALUE
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strio_copy(VALUE copy, VALUE orig)
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{
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struct StringIO *ptr;
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orig = rb_convert_type(orig, T_DATA, "StringIO", "to_strio");
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if (copy == orig) return copy;
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ptr = StringIO(orig);
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if (check_strio(copy)) {
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strio_free(DATA_PTR(copy));
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}
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DATA_PTR(copy) = ptr;
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OBJ_INFECT(copy, orig);
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++ptr->count;
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return copy;
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}
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/*
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* call-seq:
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* strio.lineno -> integer
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*
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* Returns the current line number in *strio*. The stringio must be
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* opened for reading. +lineno+ counts the number of times +gets+ is
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* called, rather than the number of newlines encountered. The two
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* values will differ if +gets+ is called with a separator other than
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* newline. See also the <code>$.</code> variable.
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*/
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static VALUE
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strio_get_lineno(VALUE self)
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{
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return LONG2NUM(StringIO(self)->lineno);
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}
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/*
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* call-seq:
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* strio.lineno = integer -> integer
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*
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* Manually sets the current line number to the given value.
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* <code>$.</code> is updated only on the next read.
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*/
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static VALUE
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strio_set_lineno(VALUE self, VALUE lineno)
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{
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StringIO(self)->lineno = NUM2LONG(lineno);
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return lineno;
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}
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/* call-seq: strio.binmode -> true */
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#define strio_binmode strio_self
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/* call-seq: strio.fcntl */
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#define strio_fcntl strio_unimpl
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/* call-seq: strio.flush -> strio */
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#define strio_flush strio_self
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/* call-seq: strio.fsync -> 0 */
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#define strio_fsync strio_0
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/*
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* call-seq:
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* strio.reopen(other_StrIO) -> strio
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* strio.reopen(string, mode) -> strio
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*
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* Reinitializes *strio* with the given <i>other_StrIO</i> or _string_
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* and _mode_ (see StringIO#new).
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*/
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static VALUE
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strio_reopen(int argc, VALUE *argv, VALUE self)
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{
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if (!OBJ_TAINTED(self)) rb_secure(4);
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if (argc == 1 && TYPE(*argv) != T_STRING) {
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return strio_copy(self, *argv);
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}
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strio_init(argc, argv, StringIO(self));
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return self;
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}
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/*
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* call-seq:
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* strio.pos -> integer
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* strio.tell -> integer
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*
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* Returns the current offset (in bytes) of *strio*.
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*/
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static VALUE
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strio_get_pos(VALUE self)
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{
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return LONG2NUM(StringIO(self)->pos);
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}
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/*
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* call-seq:
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* strio.pos = integer -> integer
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*
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* Seeks to the given position (in bytes) in *strio*.
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*/
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static VALUE
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strio_set_pos(VALUE self, VALUE pos)
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{
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struct StringIO *ptr = StringIO(self);
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long p = NUM2LONG(pos);
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if (p < 0) {
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error_inval(0);
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}
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ptr->pos = p;
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return pos;
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}
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/*
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* call-seq:
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* strio.rewind -> 0
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*
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* Positions *strio* to the beginning of input, resetting
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* +lineno+ to zero.
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*/
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static VALUE
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strio_rewind(VALUE self)
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{
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struct StringIO *ptr = StringIO(self);
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ptr->pos = 0;
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ptr->lineno = 0;
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return INT2FIX(0);
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}
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/*
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* call-seq:
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* strio.seek(amount, whence=SEEK_SET) -> 0
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*
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|
* Seeks to a given offset _amount_ in the stream according to
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* the value of _whence_ (see IO#seek).
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*/
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static VALUE
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strio_seek(int argc, VALUE *argv, VALUE self)
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{
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VALUE whence;
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struct StringIO *ptr = StringIO(self);
|
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long offset;
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|
|
rb_scan_args(argc, argv, "11", NULL, &whence);
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offset = NUM2LONG(argv[0]);
|
|
if (CLOSED(ptr)) {
|
|
rb_raise(rb_eIOError, "closed stream");
|
|
}
|
|
switch (NIL_P(whence) ? 0 : NUM2LONG(whence)) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
offset += ptr->pos;
|
|
break;
|
|
case 2:
|
|
offset += RSTRING_LEN(ptr->string);
|
|
break;
|
|
default:
|
|
error_inval("invalid whence");
|
|
}
|
|
if (offset < 0) {
|
|
error_inval(0);
|
|
}
|
|
ptr->pos = offset;
|
|
return INT2FIX(0);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.sync -> true
|
|
*
|
|
* Returns +true+ always.
|
|
*/
|
|
static VALUE
|
|
strio_get_sync(VALUE self)
|
|
{
|
|
StringIO(self);
|
|
return Qtrue;
|
|
}
|
|
|
|
/* call-seq: strio.sync = boolean -> boolean */
|
|
#define strio_set_sync strio_first
|
|
|
|
#define strio_tell strio_get_pos
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.each_byte {|byte| block } -> strio
|
|
*
|
|
* See IO#each_byte.
|
|
*/
|
|
static VALUE
|
|
strio_each_byte(VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(StringIO(self));
|
|
|
|
RETURN_ENUMERATOR(self, 0, 0);
|
|
|
|
while (ptr->pos < RSTRING_LEN(ptr->string)) {
|
|
char c = RSTRING_PTR(ptr->string)[ptr->pos++];
|
|
rb_yield(CHR2FIX(c));
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.getc -> string or nil
|
|
*
|
|
* See IO#getc.
|
|
*/
|
|
static VALUE
|
|
strio_getc(VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(StringIO(self));
|
|
rb_encoding *enc = rb_enc_get(ptr->string);
|
|
int len;
|
|
char *p;
|
|
|
|
if (ptr->pos >= RSTRING_LEN(ptr->string)) {
|
|
return Qnil;
|
|
}
|
|
p = RSTRING_PTR(ptr->string)+ptr->pos;
|
|
len = rb_enc_mbclen(p, RSTRING_END(ptr->string), enc);
|
|
ptr->pos += len;
|
|
return rb_enc_str_new(p, len, rb_enc_get(ptr->string));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.getbyte -> fixnum or nil
|
|
*
|
|
* See IO#getbyte.
|
|
*/
|
|
static VALUE
|
|
strio_getbyte(VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(StringIO(self));
|
|
int c;
|
|
if (ptr->pos >= RSTRING_LEN(ptr->string)) {
|
|
return Qnil;
|
|
}
|
|
c = RSTRING_PTR(ptr->string)[ptr->pos++];
|
|
return CHR2FIX(c);
|
|
}
|
|
|
|
static void
|
|
strio_extend(struct StringIO *ptr, long pos, long len)
|
|
{
|
|
long olen;
|
|
|
|
check_modifiable(ptr);
|
|
olen = RSTRING_LEN(ptr->string);
|
|
if (pos + len > olen) {
|
|
rb_str_resize(ptr->string, pos + len);
|
|
if (pos > olen)
|
|
MEMZERO(RSTRING_PTR(ptr->string) + olen, char, pos - olen);
|
|
}
|
|
else {
|
|
rb_str_modify(ptr->string);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.ungetc(string) -> nil
|
|
*
|
|
* Pushes back one character (passed as a parameter) onto *strio*
|
|
* such that a subsequent buffered read will return it. There is no
|
|
* limitation for multiple pushbacks including pushing back behind the
|
|
* beginning of the buffer string.
|
|
*/
|
|
static VALUE
|
|
strio_ungetc(VALUE self, VALUE c)
|
|
{
|
|
struct StringIO *ptr = readable(StringIO(self));
|
|
long lpos, clen;
|
|
char *p, *pend;
|
|
rb_encoding *enc, *enc2;
|
|
|
|
if (NIL_P(c)) return Qnil;
|
|
if (FIXNUM_P(c)) {
|
|
int cc = FIX2INT(c);
|
|
char buf[16];
|
|
|
|
enc = rb_enc_get(ptr->string);
|
|
rb_enc_mbcput(cc, buf, enc);
|
|
c = rb_enc_str_new(buf, rb_enc_codelen(cc, enc), enc);
|
|
}
|
|
else {
|
|
SafeStringValue(c);
|
|
enc = rb_enc_get(ptr->string);
|
|
enc2 = rb_enc_get(c);
|
|
if (enc != enc2 && enc != rb_ascii8bit_encoding()) {
|
|
c = rb_str_conv_enc(c, enc2, enc);
|
|
}
|
|
}
|
|
/* get logical position */
|
|
lpos = 0; p = RSTRING_PTR(ptr->string); pend = p + ptr->pos;
|
|
for (;;) {
|
|
clen = rb_enc_mbclen(p, pend, enc);
|
|
if (p+clen >= pend) break;
|
|
p += clen;
|
|
lpos++;
|
|
}
|
|
clen = p - RSTRING_PTR(ptr->string);
|
|
rb_str_update(ptr->string, lpos, ptr->pos ? 1 : 0, c);
|
|
ptr->pos = clen;
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.ungetbyte(fixnum) -> nil
|
|
*
|
|
* See IO#ungetbyte
|
|
*/
|
|
static VALUE
|
|
strio_ungetbyte(VALUE self, VALUE c)
|
|
{
|
|
struct StringIO *ptr = readable(StringIO(self));
|
|
char buf[1], *cp = buf;
|
|
long pos = ptr->pos, cl = 1;
|
|
VALUE str = ptr->string;
|
|
|
|
if (NIL_P(c)) return Qnil;
|
|
if (FIXNUM_P(c)) {
|
|
buf[0] = (char)FIX2INT(c);
|
|
}
|
|
else {
|
|
SafeStringValue(c);
|
|
cp = RSTRING_PTR(c);
|
|
cl = RSTRING_LEN(c);
|
|
if (cl == 0) return Qnil;
|
|
}
|
|
rb_str_modify(str);
|
|
if (cl > pos) {
|
|
char *s;
|
|
long rest = RSTRING_LEN(str) - pos;
|
|
rb_str_resize(str, rest + cl);
|
|
s = RSTRING_PTR(str);
|
|
memmove(s + cl, s + pos, rest);
|
|
pos = 0;
|
|
}
|
|
else {
|
|
pos -= cl;
|
|
}
|
|
memcpy(RSTRING_PTR(str) + pos, cp, cl);
|
|
ptr->pos = pos;
|
|
RB_GC_GUARD(c);
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.readchar -> string
|
|
*
|
|
* See IO#readchar.
|
|
*/
|
|
static VALUE
|
|
strio_readchar(VALUE self)
|
|
{
|
|
VALUE c = strio_getc(self);
|
|
if (NIL_P(c)) rb_eof_error();
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.readbyte -> fixnum
|
|
*
|
|
* See IO#readbyte.
|
|
*/
|
|
static VALUE
|
|
strio_readbyte(VALUE self)
|
|
{
|
|
VALUE c = strio_getbyte(self);
|
|
if (NIL_P(c)) rb_eof_error();
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.each_char {|char| block } -> strio
|
|
*
|
|
* See IO#each_char.
|
|
*/
|
|
static VALUE
|
|
strio_each_char(VALUE self)
|
|
{
|
|
VALUE c;
|
|
|
|
RETURN_ENUMERATOR(self, 0, 0);
|
|
|
|
while (!NIL_P(c = strio_getc(self))) {
|
|
rb_yield(c);
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.each_codepoint {|c| block } -> strio
|
|
*
|
|
* See IO#each_codepoint.
|
|
*/
|
|
static VALUE
|
|
strio_each_codepoint(VALUE self)
|
|
{
|
|
struct StringIO *ptr;
|
|
rb_encoding *enc;
|
|
unsigned int c;
|
|
int n;
|
|
|
|
RETURN_ENUMERATOR(self, 0, 0);
|
|
|
|
ptr = readable(StringIO(self));
|
|
enc = rb_enc_get(ptr->string);
|
|
for (;;) {
|
|
if (ptr->pos >= RSTRING_LEN(ptr->string)) {
|
|
return self;
|
|
}
|
|
|
|
c = rb_enc_codepoint_len(RSTRING_PTR(ptr->string)+ptr->pos,
|
|
RSTRING_END(ptr->string), &n, enc);
|
|
rb_yield(UINT2NUM(c));
|
|
ptr->pos += n;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/* Boyer-Moore search: copied from regex.c */
|
|
static void
|
|
bm_init_skip(long *skip, const char *pat, long m)
|
|
{
|
|
int c;
|
|
|
|
for (c = 0; c < (1 << CHAR_BIT); c++) {
|
|
skip[c] = m;
|
|
}
|
|
while (--m) {
|
|
skip[(unsigned char)*pat++] = m;
|
|
}
|
|
}
|
|
|
|
static long
|
|
bm_search(const char *little, long llen, const char *big, long blen, const long *skip)
|
|
{
|
|
long i, j, k;
|
|
|
|
i = llen - 1;
|
|
while (i < blen) {
|
|
k = i;
|
|
j = llen - 1;
|
|
while (j >= 0 && big[k] == little[j]) {
|
|
k--;
|
|
j--;
|
|
}
|
|
if (j < 0) return k + 1;
|
|
i += skip[(unsigned char)big[i]];
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static VALUE
|
|
strio_getline(int argc, VALUE *argv, struct StringIO *ptr)
|
|
{
|
|
const char *s, *e, *p;
|
|
long n, limit = 0;
|
|
VALUE str;
|
|
|
|
if (argc == 0) {
|
|
str = rb_rs;
|
|
}
|
|
else {
|
|
VALUE lim, tmp;
|
|
|
|
rb_scan_args(argc, argv, "11", &str, &lim);
|
|
if (!NIL_P(lim)) limit = NUM2LONG(lim);
|
|
else if (!NIL_P(str) && TYPE(str) != T_STRING) {
|
|
tmp = rb_check_string_type(str);
|
|
if (NIL_P(tmp)) {
|
|
limit = NUM2LONG(str);
|
|
if (limit == 0) return rb_str_new(0,0);
|
|
str = rb_rs;
|
|
}
|
|
else {
|
|
str = tmp;
|
|
}
|
|
}
|
|
else if (!NIL_P(str)) {
|
|
StringValue(str);
|
|
}
|
|
}
|
|
|
|
if (ptr->pos >= (n = RSTRING_LEN(ptr->string))) {
|
|
return Qnil;
|
|
}
|
|
s = RSTRING_PTR(ptr->string);
|
|
e = s + RSTRING_LEN(ptr->string);
|
|
s += ptr->pos;
|
|
if (limit > 0 && s + limit < e) {
|
|
e = s + limit;
|
|
}
|
|
if (NIL_P(str)) {
|
|
str = strio_substr(ptr, ptr->pos, e - s);
|
|
}
|
|
else if ((n = RSTRING_LEN(str)) == 0) {
|
|
p = s;
|
|
while (*p == '\n') {
|
|
if (++p == e) {
|
|
return Qnil;
|
|
}
|
|
}
|
|
s = p;
|
|
while ((p = memchr(p, '\n', e - p)) && (p != e)) {
|
|
if (*++p == '\n') {
|
|
e = p + 1;
|
|
break;
|
|
}
|
|
}
|
|
str = strio_substr(ptr, s - RSTRING_PTR(ptr->string), e - s);
|
|
}
|
|
else if (n == 1) {
|
|
if ((p = memchr(s, RSTRING_PTR(str)[0], e - s)) != 0) {
|
|
e = p + 1;
|
|
}
|
|
str = strio_substr(ptr, ptr->pos, e - s);
|
|
}
|
|
else {
|
|
if (n < e - s) {
|
|
if (e - s < 1024) {
|
|
for (p = s; p + n <= e; ++p) {
|
|
if (MEMCMP(p, RSTRING_PTR(str), char, n) == 0) {
|
|
e = p + n;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
long skip[1 << CHAR_BIT], pos;
|
|
p = RSTRING_PTR(str);
|
|
bm_init_skip(skip, p, n);
|
|
if ((pos = bm_search(p, n, s, e - s, skip)) >= 0) {
|
|
e = s + pos + n;
|
|
}
|
|
}
|
|
}
|
|
str = strio_substr(ptr, ptr->pos, e - s);
|
|
}
|
|
ptr->pos = e - RSTRING_PTR(ptr->string);
|
|
ptr->lineno++;
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.gets(sep=$/) -> string or nil
|
|
* strio.gets(limit) -> string or nil
|
|
* strio.gets(sep, limit) -> string or nil
|
|
*
|
|
* See IO#gets.
|
|
*/
|
|
static VALUE
|
|
strio_gets(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE str = strio_getline(argc, argv, readable(StringIO(self)));
|
|
|
|
rb_lastline_set(str);
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.readline(sep=$/) -> string
|
|
* strio.readline(limit) -> string or nil
|
|
* strio.readline(sep, limit) -> string or nil
|
|
*
|
|
* See IO#readline.
|
|
*/
|
|
static VALUE
|
|
strio_readline(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE line = strio_gets(argc, argv, self);
|
|
if (NIL_P(line)) rb_eof_error();
|
|
return line;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.each(sep=$/) {|line| block } -> strio
|
|
* strio.each(limit) {|line| block } -> strio
|
|
* strio.each(sep, limit) {|line| block } -> strio
|
|
* strio.each_line(sep=$/) {|line| block } -> strio
|
|
* strio.each_line(limit) {|line| block } -> strio
|
|
* strio.each_line(sep,limit) {|line| block } -> strio
|
|
*
|
|
* See IO#each.
|
|
*/
|
|
static VALUE
|
|
strio_each(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
VALUE line;
|
|
|
|
RETURN_ENUMERATOR(self, argc, argv);
|
|
|
|
while (!NIL_P(line = strio_getline(argc, argv, readable(ptr)))) {
|
|
rb_yield(line);
|
|
}
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.readlines(sep=$/) -> array
|
|
* strio.readlines(limit) -> array
|
|
* strio.readlines(sep,limit) -> array
|
|
*
|
|
* See IO#readlines.
|
|
*/
|
|
static VALUE
|
|
strio_readlines(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
struct StringIO *ptr = StringIO(self);
|
|
VALUE ary = rb_ary_new(), line;
|
|
while (!NIL_P(line = strio_getline(argc, argv, readable(ptr)))) {
|
|
rb_ary_push(ary, line);
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.write(string) -> integer
|
|
* strio.syswrite(string) -> integer
|
|
*
|
|
* Appends the given string to the underlying buffer string of *strio*.
|
|
* The stream must be opened for writing. If the argument is not a
|
|
* string, it will be converted to a string using <code>to_s</code>.
|
|
* Returns the number of bytes written. See IO#write.
|
|
*/
|
|
static VALUE
|
|
strio_write(VALUE self, VALUE str)
|
|
{
|
|
struct StringIO *ptr = writable(StringIO(self));
|
|
long len, olen;
|
|
rb_encoding *enc, *enc2;
|
|
|
|
if (TYPE(str) != T_STRING)
|
|
str = rb_obj_as_string(str);
|
|
enc = rb_enc_get(ptr->string);
|
|
enc2 = rb_enc_get(str);
|
|
if (enc != enc2 && enc != rb_ascii8bit_encoding()) {
|
|
str = rb_str_conv_enc(str, enc2, enc);
|
|
}
|
|
len = RSTRING_LEN(str);
|
|
if (len == 0) return INT2FIX(0);
|
|
check_modifiable(ptr);
|
|
olen = RSTRING_LEN(ptr->string);
|
|
if (ptr->flags & FMODE_APPEND) {
|
|
ptr->pos = olen;
|
|
}
|
|
if (ptr->pos == olen) {
|
|
rb_str_cat(ptr->string, RSTRING_PTR(str), len);
|
|
}
|
|
else {
|
|
strio_extend(ptr, ptr->pos, len);
|
|
memmove(RSTRING_PTR(ptr->string)+ptr->pos, RSTRING_PTR(str), len);
|
|
OBJ_INFECT(ptr->string, str);
|
|
}
|
|
OBJ_INFECT(ptr->string, self);
|
|
ptr->pos += len;
|
|
return LONG2NUM(len);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio << obj -> strio
|
|
*
|
|
* See IO#<<.
|
|
*/
|
|
#define strio_addstr rb_io_addstr
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.print() -> nil
|
|
* strio.print(obj, ...) -> nil
|
|
*
|
|
* See IO#print.
|
|
*/
|
|
#define strio_print rb_io_print
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.printf(format_string [, obj, ...] ) -> nil
|
|
*
|
|
* See IO#printf.
|
|
*/
|
|
#define strio_printf rb_io_printf
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.putc(obj) -> obj
|
|
*
|
|
* See IO#putc.
|
|
*/
|
|
static VALUE
|
|
strio_putc(VALUE self, VALUE ch)
|
|
{
|
|
struct StringIO *ptr = writable(StringIO(self));
|
|
int c = NUM2CHR(ch);
|
|
long olen;
|
|
|
|
check_modifiable(ptr);
|
|
olen = RSTRING_LEN(ptr->string);
|
|
if (ptr->flags & FMODE_APPEND) {
|
|
ptr->pos = olen;
|
|
}
|
|
strio_extend(ptr, ptr->pos, 1);
|
|
RSTRING_PTR(ptr->string)[ptr->pos++] = c;
|
|
OBJ_INFECT(ptr->string, self);
|
|
return ch;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.puts(obj, ...) -> nil
|
|
*
|
|
* See IO#puts.
|
|
*/
|
|
#define strio_puts rb_io_puts
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.read([length [, buffer]]) -> string, buffer, or nil
|
|
*
|
|
* See IO#read.
|
|
*/
|
|
static VALUE
|
|
strio_read(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
struct StringIO *ptr = readable(StringIO(self));
|
|
VALUE str = Qnil;
|
|
long len;
|
|
|
|
switch (argc) {
|
|
case 2:
|
|
str = argv[1];
|
|
StringValue(str);
|
|
rb_str_modify(str);
|
|
case 1:
|
|
if (!NIL_P(argv[0])) {
|
|
len = NUM2LONG(argv[0]);
|
|
if (len < 0) {
|
|
rb_raise(rb_eArgError, "negative length %ld given", len);
|
|
}
|
|
if (len > 0 && ptr->pos >= RSTRING_LEN(ptr->string)) {
|
|
if (!NIL_P(str)) rb_str_resize(str, 0);
|
|
return Qnil;
|
|
}
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case 0:
|
|
len = RSTRING_LEN(ptr->string);
|
|
if (len <= ptr->pos) {
|
|
if (NIL_P(str)) {
|
|
str = rb_str_new(0, 0);
|
|
}
|
|
else {
|
|
rb_str_resize(str, 0);
|
|
}
|
|
return str;
|
|
}
|
|
else {
|
|
len -= ptr->pos;
|
|
}
|
|
break;
|
|
default:
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", argc);
|
|
}
|
|
if (NIL_P(str)) {
|
|
str = strio_substr(ptr, ptr->pos, len);
|
|
if (argc > 0) rb_enc_associate(str, rb_ascii8bit_encoding());
|
|
}
|
|
else {
|
|
long rest = RSTRING_LEN(ptr->string) - ptr->pos;
|
|
if (len > rest) len = rest;
|
|
rb_str_resize(str, len);
|
|
MEMCPY(RSTRING_PTR(str), RSTRING_PTR(ptr->string) + ptr->pos, char, len);
|
|
}
|
|
if (NIL_P(str)) {
|
|
str = rb_str_new(0, 0);
|
|
len = 0;
|
|
}
|
|
else {
|
|
ptr->pos += len = RSTRING_LEN(str);
|
|
}
|
|
return str;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.sysread(integer[, outbuf]) -> string
|
|
*
|
|
* Similar to #read, but raises +EOFError+ at end of string instead of
|
|
* returning +nil+, as well as IO#sysread does.
|
|
*/
|
|
static VALUE
|
|
strio_sysread(int argc, VALUE *argv, VALUE self)
|
|
{
|
|
VALUE val = strio_read(argc, argv, self);
|
|
if (NIL_P(val)) {
|
|
rb_eof_error();
|
|
}
|
|
return val;
|
|
}
|
|
|
|
#define strio_syswrite strio_write
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.isatty -> nil
|
|
* strio.tty? -> nil
|
|
*
|
|
*/
|
|
#define strio_isatty strio_false
|
|
|
|
/* call-seq: strio.pid -> nil */
|
|
#define strio_pid strio_nil
|
|
|
|
/* call-seq: strio.fileno -> nil */
|
|
#define strio_fileno strio_nil
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.size -> integer
|
|
*
|
|
* Returns the size of the buffer string.
|
|
*/
|
|
static VALUE
|
|
strio_size(VALUE self)
|
|
{
|
|
VALUE string = StringIO(self)->string;
|
|
if (NIL_P(string)) {
|
|
rb_raise(rb_eIOError, "not opened");
|
|
}
|
|
return ULONG2NUM(RSTRING_LEN(string));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.truncate(integer) -> 0
|
|
*
|
|
* Truncates the buffer string to at most _integer_ bytes. The *strio*
|
|
* must be opened for writing.
|
|
*/
|
|
static VALUE
|
|
strio_truncate(VALUE self, VALUE len)
|
|
{
|
|
VALUE string = writable(StringIO(self))->string;
|
|
long l = NUM2LONG(len);
|
|
long plen = RSTRING_LEN(string);
|
|
if (l < 0) {
|
|
error_inval("negative legnth");
|
|
}
|
|
rb_str_resize(string, l);
|
|
if (plen < l) {
|
|
MEMZERO(RSTRING_PTR(string) + plen, char, l - plen);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.external_encoding => encoding
|
|
*
|
|
* Returns the Encoding object that represents the encoding of the file.
|
|
* If strio is write mode and no encoding is specified, returns <code>nil</code>.
|
|
*/
|
|
|
|
static VALUE
|
|
strio_external_encoding(VALUE self)
|
|
{
|
|
return rb_enc_from_encoding(rb_enc_get(StringIO(self)->string));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.internal_encoding => encoding
|
|
*
|
|
* Returns the Encoding of the internal string if conversion is
|
|
* specified. Otherwise returns nil.
|
|
*/
|
|
|
|
static VALUE
|
|
strio_internal_encoding(VALUE self)
|
|
{
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* strio.set_encoding(ext_enc) => strio
|
|
*
|
|
* Tagged with the encoding specified.
|
|
*/
|
|
|
|
static VALUE
|
|
strio_set_encoding(VALUE self, VALUE ext_enc)
|
|
{
|
|
rb_encoding* enc;
|
|
VALUE str = StringIO(self)->string;
|
|
enc = rb_to_encoding(ext_enc);
|
|
rb_enc_associate(str, enc);
|
|
return self;
|
|
}
|
|
|
|
/*
|
|
* Pseudo I/O on String object.
|
|
*/
|
|
void
|
|
Init_stringio()
|
|
{
|
|
VALUE StringIO = rb_define_class("StringIO", rb_cData);
|
|
|
|
rb_include_module(StringIO, rb_mEnumerable);
|
|
rb_define_alloc_func(StringIO, strio_s_allocate);
|
|
rb_define_singleton_method(StringIO, "open", strio_s_open, -1);
|
|
rb_define_method(StringIO, "initialize", strio_initialize, -1);
|
|
rb_define_method(StringIO, "initialize_copy", strio_copy, 1);
|
|
rb_define_method(StringIO, "reopen", strio_reopen, -1);
|
|
|
|
rb_define_method(StringIO, "string", strio_get_string, 0);
|
|
rb_define_method(StringIO, "string=", strio_set_string, 1);
|
|
rb_define_method(StringIO, "lineno", strio_get_lineno, 0);
|
|
rb_define_method(StringIO, "lineno=", strio_set_lineno, 1);
|
|
|
|
rb_define_method(StringIO, "binmode", strio_binmode, 0);
|
|
rb_define_method(StringIO, "close", strio_close, 0);
|
|
rb_define_method(StringIO, "close_read", strio_close_read, 0);
|
|
rb_define_method(StringIO, "close_write", strio_close_write, 0);
|
|
rb_define_method(StringIO, "closed?", strio_closed, 0);
|
|
rb_define_method(StringIO, "closed_read?", strio_closed_read, 0);
|
|
rb_define_method(StringIO, "closed_write?", strio_closed_write, 0);
|
|
rb_define_method(StringIO, "eof", strio_eof, 0);
|
|
rb_define_method(StringIO, "eof?", strio_eof, 0);
|
|
rb_define_method(StringIO, "fcntl", strio_fcntl, -1);
|
|
rb_define_method(StringIO, "flush", strio_flush, 0);
|
|
rb_define_method(StringIO, "fsync", strio_fsync, 0);
|
|
rb_define_method(StringIO, "pos", strio_get_pos, 0);
|
|
rb_define_method(StringIO, "pos=", strio_set_pos, 1);
|
|
rb_define_method(StringIO, "rewind", strio_rewind, 0);
|
|
rb_define_method(StringIO, "seek", strio_seek, -1);
|
|
rb_define_method(StringIO, "sync", strio_get_sync, 0);
|
|
rb_define_method(StringIO, "sync=", strio_set_sync, 1);
|
|
rb_define_method(StringIO, "tell", strio_tell, 0);
|
|
|
|
rb_define_method(StringIO, "each", strio_each, -1);
|
|
rb_define_method(StringIO, "each_line", strio_each, -1);
|
|
rb_define_method(StringIO, "lines", strio_each, -1);
|
|
rb_define_method(StringIO, "each_byte", strio_each_byte, 0);
|
|
rb_define_method(StringIO, "bytes", strio_each_byte, 0);
|
|
rb_define_method(StringIO, "each_char", strio_each_char, 0);
|
|
rb_define_method(StringIO, "chars", strio_each_char, 0);
|
|
rb_define_method(StringIO, "each_codepoint", strio_each_codepoint, 0);
|
|
rb_define_method(StringIO, "codepoints", strio_each_codepoint, 0);
|
|
rb_define_method(StringIO, "getc", strio_getc, 0);
|
|
rb_define_method(StringIO, "ungetc", strio_ungetc, 1);
|
|
rb_define_method(StringIO, "ungetbyte", strio_ungetbyte, 1);
|
|
rb_define_method(StringIO, "readchar", strio_readchar, 0);
|
|
rb_define_method(StringIO, "getbyte", strio_getbyte, 0);
|
|
rb_define_method(StringIO, "readbyte", strio_readbyte, 0);
|
|
rb_define_method(StringIO, "gets", strio_gets, -1);
|
|
rb_define_method(StringIO, "readline", strio_readline, -1);
|
|
rb_define_method(StringIO, "readlines", strio_readlines, -1);
|
|
rb_define_method(StringIO, "read", strio_read, -1);
|
|
rb_define_method(StringIO, "sysread", strio_sysread, -1);
|
|
rb_define_method(StringIO, "readpartial", strio_sysread, -1);
|
|
rb_define_method(StringIO, "read_nonblock", strio_sysread, -1);
|
|
|
|
rb_define_method(StringIO, "write", strio_write, 1);
|
|
rb_define_method(StringIO, "<<", strio_addstr, 1);
|
|
rb_define_method(StringIO, "print", strio_print, -1);
|
|
rb_define_method(StringIO, "printf", strio_printf, -1);
|
|
rb_define_method(StringIO, "putc", strio_putc, 1);
|
|
rb_define_method(StringIO, "puts", strio_puts, -1);
|
|
rb_define_method(StringIO, "syswrite", strio_syswrite, 1);
|
|
rb_define_method(StringIO, "write_nonblock", strio_syswrite, 1);
|
|
|
|
rb_define_method(StringIO, "isatty", strio_isatty, 0);
|
|
rb_define_method(StringIO, "tty?", strio_isatty, 0);
|
|
rb_define_method(StringIO, "pid", strio_pid, 0);
|
|
rb_define_method(StringIO, "fileno", strio_fileno, 0);
|
|
rb_define_method(StringIO, "size", strio_size, 0);
|
|
rb_define_method(StringIO, "length", strio_size, 0);
|
|
rb_define_method(StringIO, "truncate", strio_truncate, 1);
|
|
|
|
rb_define_method(StringIO, "external_encoding", strio_external_encoding, 0);
|
|
rb_define_method(StringIO, "internal_encoding", strio_internal_encoding, 0);
|
|
rb_define_method(StringIO, "set_encoding", strio_set_encoding, 1);
|
|
}
|