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#include <stdio.h>
#include <ruby.h>
#include <ruby/encoding.h>
#include <ruby/re.h>
#include <ruby/version.h>
#define STR_ENC_GET(str) rb_enc_from_index(ENCODING_GET(str))
#ifndef RUBY_API_VERSION_CODE
# define ruby_version_before_2_2() 1
#else
# define ruby_version_before_2_2() (RUBY_API_VERSION_CODE < 20200)
#endif
static VALUE
rb_str_blank_as(VALUE str)
{
rb_encoding *enc;
char *s, *e;
enc = STR_ENC_GET(str);
s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return Qtrue;
e = RSTRING_END(str);
while (s < e) {
int n;
unsigned int cc = rb_enc_codepoint_len(s, e, &n, enc);
switch (cc) {
case 9:
case 0xa:
case 0xb:
case 0xc:
case 0xd:
case 0x20:
case 0x85:
case 0xa0:
case 0x1680:
case 0x2000:
case 0x2001:
case 0x2002:
case 0x2003:
case 0x2004:
case 0x2005:
case 0x2006:
case 0x2007:
case 0x2008:
case 0x2009:
case 0x200a:
case 0x2028:
case 0x2029:
case 0x202f:
case 0x205f:
case 0x3000:
#if ruby_version_before_2_2()
case 0x180e:
#endif
/* found */
break;
default:
return Qfalse;
}
s += n;
}
return Qtrue;
}
static VALUE
rb_str_blank(VALUE str)
{
rb_encoding *enc;
char *s, *e;
enc = STR_ENC_GET(str);
s = RSTRING_PTR(str);
if (!s || RSTRING_LEN(str) == 0) return Qtrue;
e = RSTRING_END(str);
while (s < e) {
int n;
unsigned int cc = rb_enc_codepoint_len(s, e, &n, enc);
if (!rb_isspace(cc) && cc != 0) return Qfalse;
s += n;
}
return Qtrue;
}
void Init_fast_blank( void )
{
rb_define_method(rb_cString, "blank?", rb_str_blank, 0);
rb_define_method(rb_cString, "blank_as?", rb_str_blank_as, 0);
}