diff options
Diffstat (limited to 'ext')
-rw-r--r-- | ext/strscan/strscan.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/ext/strscan/strscan.c b/ext/strscan/strscan.c index 4623994612..983debe071 100644 --- a/ext/strscan/strscan.c +++ b/ext/strscan/strscan.c @@ -975,6 +975,25 @@ strscan_matched_size(VALUE self) return INT2NUM(p->regs.end[0] - p->regs.beg[0]); } +static int +name_to_backref_number(struct re_registers *regs, VALUE regexp, const char* name, const char* name_end) +{ + int num; + + num = onig_name_to_backref_number(RREGEXP(regexp)->ptr, + (const unsigned char* )name, (const unsigned char* )name_end, regs); + if (num >= 1) { + return num; + } + else { + VALUE s = rb_str_new(name, (long )(name_end - name)); + rb_raise(rb_eIndexError, "undefined group name reference: %s", + StringValuePtr(s)); + } + + UNREACHABLE; +} + /* * call-seq: [](n) * @@ -1019,9 +1038,7 @@ strscan_aref(VALUE self, VALUE idx) case T_STRING: name = StringValuePtr(idx); name_to_backref: - name_end = name + strlen(name); - i = onig_name_to_backref_number(RREGEXP(p->regex)->ptr, - (const unsigned char* )name, (const unsigned char* )name_end, &(p->regs)); + i = name_to_backref_number(&(p->regs), p->regex, name, name + strlen(name)); break; default: i = NUM2LONG(idx); |