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;
+}