Justin C. Miller
0ab2f59fe8
The strncmp implementation too eagerly advanced the string pointers, such that it would compare the next characters after the ones that didn't match.
28 lines
652 B
C++
28 lines
652 B
C++
/** \file memcpy.cpp
|
|
*
|
|
* This file is part of the C standard library for the jsix operating
|
|
* system.
|
|
*
|
|
* 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 <string.h>
|
|
|
|
int strncmp(const char *s1, const char *s2, size_t n) {
|
|
if (!s1 || !s2) return 0;
|
|
|
|
char const * c1 = s1;
|
|
char const * c2 = s2;
|
|
|
|
while (n && *c1 && *c2 && *c1 == *c2) {
|
|
n--; c1++; c2++;
|
|
}
|
|
|
|
if (!n || *c1 == *c2) return 0;
|
|
if (!*c2 || *c1 > *c2) return 1;
|
|
return -1;
|
|
}
|
|
|