Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master
Fetching contributors…

Cannot retrieve contributors at this time

165 lines (135 sloc) 4.064 kb
/*
* Copyright (C) 2011 Nick Johnson <nickbjohnson4224 at gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <string.h>
void *memcpy(void *dst, const void *src, size_t size) {
size_t i;
uint8_t *d = dst;
const uint8_t *s = src;
for (i = 0; i < size; i++) {
d[i] = s[i];
}
return dst;
}
void *memclr(void *ptr, size_t size) {
size_t i;
uint8_t *a = ptr;
for (i = 0; i < size; i++) {
a[i] = 0;
}
return ptr;
}
char *strcpy(char *dst, const char *src) {
size_t i;
for (i = 0; src[i] != '\0'; i++) {
dst[i] = src[i];
}
dst[i] = '\0';
return dst;
}
int strcmp(const char *s1, const char *s2) {
size_t i;
for (i = 0;; i++) {
if (s1[i] == s2[i]) {
if (s1[i] == '\0') return 0;
continue;
}
if (s1[i] == '\0') return -1;
if (s2[i] == '\0') return 1;
if (s1[i] < s2[i]) return -1;
else return 1;
}
}
size_t strlen(const char *str) {
size_t i;
for (i = 0; str[i]; i++);
return i;
}
/*
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/****************************************************************************
* strlcpy
*
* Copy src to string dst of size siz. At most siz-1 characters
* will be copied. Always NUL terminates (unless siz == 0).
* Returns strlen(src); if retval >= siz, truncation occurred.
*/
size_t strlcpy(char *dst, const char *src, size_t siz) {
char *d = dst;
const char *s = src;
size_t n = siz;
/* Copy as many bytes as will fit */
if (n != 0) {
while (--n != 0) {
if ((*d++ = *s++) == '\0') {
break;
}
}
}
/* Not enough room in dst, add NUL and traverse rest of src */
if (n == 0) {
if (siz != 0) {
*d = '\0'; /* NUL-terminate dst */
}
while (*s++);
}
return (s - src - 1); /* count does not include NUL */
}
/****************************************************************************
* strlcat
*
* Appends src to string dst of size siz (unlike strncat, siz is the
* full size of dst, not space left). At most siz-1 characters
* will be copied. Always NUL terminates (unless siz <= strlen(dst)).
* Returns strlen(src) + MIN(siz, strlen(initial dst)).
* If retval >= siz, truncation occurred.
*/
size_t strlcat(char *dst, const char *src, size_t siz) {
char *d = dst;
const char *s = src;
size_t n = siz;
size_t dlen;
/* Find the end of dst and adjust bytes left but don't go past end */
while (n-- != 0 && *d != '\0') {
d++;
}
dlen = d - dst;
n = siz - dlen;
if (n == 0) {
return (dlen + strlen(s));
}
while (*s != '\0') {
if (n != 1) {
*d++ = *s;
n--;
}
s++;
}
*d = '\0';
return (dlen + (s - src)); /* count does not include NUL */
}
Jump to Line
Something went wrong with that request. Please try again.