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#include "ruby.h"
#include "ruby/encoding.h"
static VALUE
bug_str_cstr_term(VALUE str)
{
long len;
char *s;
int c;
rb_encoding *enc;
rb_str_modify(str);
len = RSTRING_LEN(str);
RSTRING_PTR(str)[len] = 'x';
s = StringValueCStr(str);
rb_gc();
enc = rb_enc_get(str);
c = rb_enc_codepoint(&s[len], &s[len+rb_enc_mbminlen(enc)], enc);
return INT2NUM(c);
}
static VALUE
bug_str_cstr_term_char(VALUE str)
{
long len;
char *s;
int c;
rb_encoding *enc = rb_enc_get(str);
RSTRING_GETMEM(str, s, len);
s += len;
len = rb_enc_mbminlen(enc);
c = rb_enc_precise_mbclen(s, s + len, enc);
if (!MBCLEN_CHARFOUND_P(c)) {
c = (unsigned char)*s;
}
else {
c = rb_enc_mbc_to_codepoint(s, s + len, enc);
}
return c ? rb_enc_uint_chr((unsigned int)c, enc) : Qnil;
}
static VALUE
bug_str_s_cstr_term_char(VALUE self, VALUE str)
{
Check_Type(str, T_STRING);
return bug_str_cstr_term_char(str);
}
void
Init_cstr(VALUE klass)
{
rb_define_method(klass, "cstr_term", bug_str_cstr_term, 0);
rb_define_method(klass, "cstr_term_char", bug_str_cstr_term_char, 0);
rb_define_singleton_method(klass, "cstr_term_char", bug_str_s_cstr_term_char, 1);
}
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