diff options
Diffstat (limited to 'zap/src/strcmp.c')
-rw-r--r-- | zap/src/strcmp.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/zap/src/strcmp.c b/zap/src/strcmp.c new file mode 100644 index 0000000..9e11601 --- /dev/null +++ b/zap/src/strcmp.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 <stdint.h> + +int_least8_t zap_strcmp(char const * const _lstr,char const * const _rstr) { + unsigned char const * lpos = (unsigned char const *)_lstr; + unsigned char const * rpos = (unsigned char const *)_rstr; + for (;;++lpos,++rpos) { + unsigned char const lchr = *lpos; + unsigned char const rchr = *rpos; + sus_likely (lchr != rchr) {return lchr < rchr ? (int_least8_t)INT8_MIN : (int_least8_t)INT8_MAX;} + sus_unlikely (lchr == (unsigned char)0x0) {return zap_typlit_s8(0x0);} + } + sus_unreach(); +} |