127 lines
2.3 KiB
C
127 lines
2.3 KiB
C
/* See the end of this file for copyright and license terms. */
|
|
|
|
#include <gay/types.h>
|
|
|
|
#include <string.h>
|
|
|
|
int memcmp(const void *s1, const void *s2, size_t n)
|
|
{
|
|
int delta = 0;
|
|
|
|
while (n-- > 0) {
|
|
/* POSIX explicitly wants a cast to unsigned char */
|
|
delta = *(const unsigned char *)s1++ - *(const unsigned char *)s2++;
|
|
if (delta != 0)
|
|
break;
|
|
}
|
|
|
|
return delta;
|
|
}
|
|
|
|
void *memcpy(void *dest, const void *src, size_t n)
|
|
{
|
|
u8 *tmp = (u8 *)dest;
|
|
|
|
while (n-- > 0)
|
|
*tmp++ = *(const u8 *)src++;
|
|
|
|
return dest;
|
|
}
|
|
|
|
void *memset(void *ptr, int c, size_t n)
|
|
{
|
|
char *tmp = (char *)ptr;
|
|
|
|
while (n-- > 0)
|
|
*tmp++ = (char)c;
|
|
|
|
return ptr;
|
|
}
|
|
|
|
void *memmove(void *dest, const void *src, size_t n)
|
|
{
|
|
char *tmp = (char *)dest;
|
|
const char *s = (const char *)src;
|
|
|
|
if (dest == src)
|
|
return dest;
|
|
|
|
if (dest < src) {
|
|
while (n-- != 0)
|
|
*tmp++ = *s++;
|
|
} else {
|
|
tmp += n;
|
|
s += n;
|
|
while (n-- != 0)
|
|
*--tmp = *--s;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
int strcmp(const char *s1, const char *s2)
|
|
{
|
|
while (*s1 == *s2) {
|
|
if (*s1++ == '\0' || *s2++ == '\0')
|
|
break;
|
|
}
|
|
|
|
/* POSIX explicitly wants a cast to unsigned char */
|
|
return *((const unsigned char *)s1) - *((const unsigned char *)s2);
|
|
}
|
|
|
|
char *strcpy(char *dest, const char *src)
|
|
{
|
|
char *tmp = dest;
|
|
|
|
while ((*tmp++ = *src++) != '\0');
|
|
/* nothing */
|
|
|
|
return dest;
|
|
}
|
|
|
|
char *strncpy(char *dest, const char *src, size_t n)
|
|
{
|
|
char *tmp = dest;
|
|
|
|
while (n-- != 0) {
|
|
if ((*tmp++ = *src++) == '\0')
|
|
break;
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
size_t strlen(const char *s)
|
|
{
|
|
const char *tmp = s;
|
|
|
|
while (*tmp++ != '\0');
|
|
/* nothing */
|
|
|
|
return (size_t)tmp - (size_t)s - 1;
|
|
}
|
|
|
|
size_t strnlen(const char *s, size_t maxlen)
|
|
{
|
|
const char *tmp = s;
|
|
|
|
while (*tmp++ != '\0' && maxlen-- > 0);
|
|
/* nothing */
|
|
|
|
return (size_t)tmp - (size_t)s - 1;
|
|
}
|
|
|
|
/*
|
|
* This file is part of GayBSD.
|
|
* Copyright (c) 2021 fef <owo@fef.moe>.
|
|
*
|
|
* GayBSD is nonviolent software: you may only use, redistribute, and/or
|
|
* modify it under the terms of the Cooperative Nonviolent Public License
|
|
* (CNPL) as found in the LICENSE file in the source code root directory
|
|
* or at <https://git.pixie.town/thufie/npl-builder>; either version 7
|
|
* of the license, or (at your option) any later version.
|
|
*
|
|
* GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
|
|
* permitted by applicable law. See the CNPL for details.
|
|
*/
|