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tweaks: avoid the subtraction of two size_t variables becoming negative 

This fixes https://savannah.gnu.org/bugs/?60658.

Found by compiling with -fsanitize=undefined.
master
Benno Schulenberg 2021-05-23 11:46:37 +02:00
parent d1957819c4
commit ceaae49b2d
1 changed files with 1 additions and 1 deletions
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2
src/chars.c
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@ -540,7 +540,7 @@ char *mbrevstrcasestr(const char *haystack, const char *needle,
size_t tail_len = mbstrlen(pointer); size_t tail_len = mbstrlen(pointer);
if (tail_len < needle_len) if (tail_len < needle_len)
pointer += tail_len - needle_len; pointer -= (needle_len - tail_len);
if (pointer < haystack) if (pointer < haystack)
return NULL; return NULL;