pebble/platform/tintin/boot/libc/string/memcmp.c
2025-01-27 11:38:16 -08:00

35 lines
1,015 B
C

/*
* Copyright 2024 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
///////////////////////////////////////
// Implements:
// int memcmp(const void *s1, const void *s2, size_t n);
#include <stddef.h>
int memcmp(const void *s1, const void *s2, size_t n) {
const unsigned char *p1 = (const unsigned char*)s1;
const unsigned char *p2 = (const unsigned char*)s2;
while (n--) {
int diff = *p1 - *p2;
if (diff) {
return diff;
}
p1++;
p2++;
}
return 0;
}