scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
Log | Files | Refs | README | LICENSE

commit 437e32bac531455249a2ad20e2756da782fc2167
parent 9fdc79d8cddf62db618edfa7dd30e2413dc1ecb9
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu,  7 Dec 2017 00:36:48 +0100

[lib/c] Simplify strncmp()

This functio tried to write too many things in a line, and
this new version maybe has a better performance.

Diffstat:
Mlib/c/src/strncmp.c | 13++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lib/c/src/strncmp.c b/lib/c/src/strncmp.c @@ -4,7 +4,14 @@ int strncmp(const char *s1, const char *s2, size_t n) { - for (; n && *s1 && *s2 && *s1 == *s2; --n, ++s1, ++s2); - ; - return n ? (*(unsigned char *)s1 - *(unsigned char *)s2) : 0; + int c; + + if (n == 0) + return 0; + while ((c = *s1) != '\0' && c != *s2) { + if (--n == 0) + return 0; + ++s1, ++s2; + } + return (*(unsigned char *) s1 - *(unsigned char *) s2); }