2016-02-02 23:52:13 -05:00
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#include "internal.h"
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2011-01-24 17:00:55 -05:00
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static VALUE
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bug_str_cstr_term(VALUE str)
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{
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long len;
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char *s;
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2013-07-11 07:17:59 -04:00
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int c;
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rb_encoding *enc;
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2011-01-24 17:00:55 -05:00
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len = RSTRING_LEN(str);
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s = StringValueCStr(str);
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rb_gc();
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2013-07-11 07:17:59 -04:00
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enc = rb_enc_get(str);
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c = rb_enc_codepoint(&s[len], &s[len+rb_enc_mbminlen(enc)], enc);
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return INT2NUM(c);
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2011-01-24 17:00:55 -05:00
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}
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2015-12-01 03:09:17 -05:00
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static VALUE
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bug_str_cstr_unterm(VALUE str, VALUE c)
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{
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long len;
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rb_str_modify(str);
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len = RSTRING_LEN(str);
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RSTRING_PTR(str)[len] = NUM2CHR(c);
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return str;
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}
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2014-11-04 20:54:22 -05:00
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static VALUE
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bug_str_cstr_term_char(VALUE str)
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{
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long len;
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char *s;
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int c;
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rb_encoding *enc = rb_enc_get(str);
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RSTRING_GETMEM(str, s, len);
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2015-01-25 21:00:43 -05:00
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s += len;
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len = rb_enc_mbminlen(enc);
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c = rb_enc_precise_mbclen(s, s + len, enc);
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if (!MBCLEN_CHARFOUND_P(c)) {
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c = (unsigned char)*s;
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}
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else {
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c = rb_enc_mbc_to_codepoint(s, s + len, enc);
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2015-01-26 23:09:04 -05:00
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if (!c) return Qnil;
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2015-01-25 21:00:43 -05:00
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}
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2015-01-26 23:09:04 -05:00
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return rb_enc_uint_chr((unsigned int)c, enc);
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2014-11-04 20:54:22 -05:00
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}
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2016-05-30 03:20:28 -04:00
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static VALUE
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bug_str_unterminated_substring(VALUE str, VALUE vbeg, VALUE vlen)
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{
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long beg = NUM2LONG(vbeg);
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long len = NUM2LONG(vlen);
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rb_str_modify(str);
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if (len < 0) rb_raise(rb_eArgError, "negative length: %ld", len);
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if (RSTRING_LEN(str) < beg) rb_raise(rb_eIndexError, "beg: %ld", beg);
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if (RSTRING_LEN(str) < beg + len) rb_raise(rb_eIndexError, "end: %ld", beg + len);
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str = rb_str_new_shared(str);
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if (STR_EMBED_P(str)) {
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RSTRING(str)->basic.flags &= ~RSTRING_EMBED_LEN_MASK;
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RSTRING(str)->basic.flags |= len << RSTRING_EMBED_LEN_SHIFT;
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memmove(RSTRING(str)->as.ary, RSTRING(str)->as.ary + beg, len);
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}
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else {
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RSTRING(str)->as.heap.ptr += beg;
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RSTRING(str)->as.heap.len = len;
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}
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return str;
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}
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2015-12-01 03:09:17 -05:00
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static VALUE
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bug_str_s_cstr_term(VALUE self, VALUE str)
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{
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Check_Type(str, T_STRING);
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return bug_str_cstr_term(str);
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}
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static VALUE
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bug_str_s_cstr_unterm(VALUE self, VALUE str, VALUE c)
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{
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Check_Type(str, T_STRING);
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return bug_str_cstr_unterm(str, c);
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}
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2015-01-25 21:00:56 -05:00
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static VALUE
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bug_str_s_cstr_term_char(VALUE self, VALUE str)
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{
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Check_Type(str, T_STRING);
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return bug_str_cstr_term_char(str);
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}
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2016-02-02 23:52:13 -05:00
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#define TERM_LEN(str) rb_enc_mbminlen(rb_enc_get(str))
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#define TERM_FILL(ptr, termlen) do {\
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char *const term_fill_ptr = (ptr);\
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const int term_fill_len = (termlen);\
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*term_fill_ptr = '\0';\
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if (UNLIKELY(term_fill_len > 1))\
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memset(term_fill_ptr, 0, term_fill_len);\
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} while (0)
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static VALUE
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bug_str_s_cstr_noembed(VALUE self, VALUE str)
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{
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VALUE str2 = rb_str_new(NULL, 0);
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long capacity = RSTRING_LEN(str) + TERM_LEN(str);
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char *buf = ALLOC_N(char, capacity);
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Check_Type(str, T_STRING);
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FL_SET((str2), STR_NOEMBED);
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memcpy(buf, RSTRING_PTR(str), capacity);
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RBASIC(str2)->flags &= ~RSTRING_EMBED_LEN_MASK;
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RSTRING(str2)->as.heap.aux.capa = capacity;
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RSTRING(str2)->as.heap.ptr = buf;
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RSTRING(str2)->as.heap.len = RSTRING_LEN(str);
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TERM_FILL(RSTRING_END(str2), TERM_LEN(str));
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return str2;
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}
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static VALUE
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bug_str_s_cstr_embedded_p(VALUE self, VALUE str)
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{
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return STR_EMBED_P(str) ? Qtrue : Qfalse;
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}
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static VALUE
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bug_str_s_rb_str_new_frozen(VALUE self, VALUE str)
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{
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return rb_str_new_frozen(str);
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}
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2011-01-24 17:00:55 -05:00
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void
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Init_cstr(VALUE klass)
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{
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rb_define_method(klass, "cstr_term", bug_str_cstr_term, 0);
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2015-12-01 03:09:17 -05:00
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rb_define_method(klass, "cstr_unterm", bug_str_cstr_unterm, 1);
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2014-11-04 20:54:22 -05:00
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rb_define_method(klass, "cstr_term_char", bug_str_cstr_term_char, 0);
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2016-05-30 03:20:28 -04:00
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rb_define_method(klass, "unterminated_substring", bug_str_unterminated_substring, 2);
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2015-12-01 03:09:17 -05:00
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rb_define_singleton_method(klass, "cstr_term", bug_str_s_cstr_term, 1);
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rb_define_singleton_method(klass, "cstr_unterm", bug_str_s_cstr_unterm, 2);
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2015-01-25 21:00:56 -05:00
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rb_define_singleton_method(klass, "cstr_term_char", bug_str_s_cstr_term_char, 1);
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2016-02-02 23:52:13 -05:00
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rb_define_singleton_method(klass, "cstr_noembed", bug_str_s_cstr_noembed, 1);
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rb_define_singleton_method(klass, "cstr_embedded?", bug_str_s_cstr_embedded_p, 1);
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rb_define_singleton_method(klass, "rb_str_new_frozen", bug_str_s_rb_str_new_frozen, 1);
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2011-01-24 17:00:55 -05:00
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}
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