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Import strcat and strncat from FreeBSD

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This commit is contained in:
Ali Mashtizadeh 2015-01-23 12:15:26 -08:00
parent 359d55f53c
commit 6cc254dd24
2 changed files with 40 additions and 0 deletions
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3
include/string.h
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@ -15,5 +15,8 @@ size_t strlen(const char *str);
int strncmp(const char *s1, const char *s2, size_t len);
char *strncpy(char *to, const char *from, size_t len);
char *strcat(char *s, const char *append);
char *strncat(char *s, const char *append, size_t count);
#endif /* __STRING_H__ */

37
lib/libc/string.c
View File

@ -2,6 +2,8 @@
* Copyright (c) 2013-2014 Stanford University
* Copyright (c) 2006-2008 Ali Mashtizadeh
* All rights reserved.
*
* XXX: add BSD copyright
*/
#include <stddef.h>
@ -43,6 +45,41 @@ strncpy(char *to, const char *from, size_t length)
return save;
}
char *
strcat(char *s, const char *append)
{
char *save = s;
for (; *s; ++s);
while ((*s++ = *append++));
return save;
}
char *
strncat(char *dst, const char *src, size_t n)
{
if (n != 0) {
char *d = dst;
const char *s = src;
while (*d != 0)
d++;
do {
if ((*d = *s++) == 0)
break;
d++;
} while (--n != 0);
*d = 0;
}
return dst;
}
int
strcmp(const char *s1, const char *s2)
{