diff options
Diffstat (limited to 'zap/src/mem/memcmp.c')
| -rw-r--r-- | zap/src/mem/memcmp.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/zap/src/mem/memcmp.c b/zap/src/mem/memcmp.c new file mode 100644 index 0000000..601da99 --- /dev/null +++ b/zap/src/mem/memcmp.c @@ -0,0 +1,21 @@ +/* + Copyright 2022 Gabriel Jensen. + This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. + If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/. +*/ + +#include <zap/priv.h> + +#include <zap/mem.h> + +zap_cmp zap_memcmp(void const * const _lstr,zap_sz const _num,void const * const _rstr) { + unsigned char const * lpos = _lstr; + unsigned char const * rpos = _rstr; + unsigned char const * const afterlbuf = lpos + _num; + for (;lpos != afterlbuf;++lpos,++rpos) { + unsigned char const lbyte = *lpos; + unsigned char const rbyte = *rpos; + sus_likely (lbyte != rbyte) {return lbyte < rbyte ? zap_lt : zap_gt;} + } + return zap_eq; +} |