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string.c (str_rindex): use more local variables; ref #5734

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2022-06-27 10:38:44 +09:00
parent 7319e744ad
commit 0b7822581f
1 changed files with 7 additions and 6 deletions
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src/string.c
+7 -6
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@@ -640,21 +640,22 @@ str_rindex(mrb_state *mrb, mrb_value str, mrb_value sub, mrb_int pos)
const char *s, *sbeg, *send, *t;
struct RString *ps = mrb_str_ptr(str);
mrb_int len = RSTRING_LEN(sub);
mrb_int slen = RSTR_LEN(ps);
/* substring longer than string */
if (RSTR_LEN(ps) < len) return -1;
if (RSTR_LEN(ps) - pos < len) {
pos = RSTR_LEN(ps) - len;
if (slen < len) return -1;
if (slen - pos < len) {
pos = slen - len;
}
sbeg = RSTR_PTR(ps);
send = sbeg + RSTR_LEN(ps);
s = RSTR_PTR(ps) + pos;
send = sbeg + slen;
s = sbeg + pos;
t = RSTRING_PTR(sub);
if (len) {
s = char_adjust(sbeg, send, s);
while (sbeg <= s) {
if ((mrb_int)(send - s) >= len && memcmp(s, t, len) == 0) {
return (mrb_int)(s - RSTR_PTR(ps));
return (mrb_int)(s - sbeg);
}
s = char_backtrack(sbeg, s);
}