Chameleon

Chameleon Commit Details

Date:2014-01-11 21:01:20 (5 years 10 months ago)
Author:Chuck Fry
Commit:2333
Parents: 2332
Message:Optimize basic string functions strlen, strncmp, strncat, strcat
Changes:
M/branches/chucko/i386/libsa/string.c

File differences

branches/chucko/i386/libsa/string.c
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size_t strlen(const char * s)
{
int n = 0;
while (*s++) n++;
return(n);
const char* save = s;
while (*s++);
return (--s) - save;
}
/*#endif*/
return (*s1 - *s2);
}
int strncmp(const char * s1, const char * s2, size_t len)
/* Derived from FreeBSD source */
int strncmp(const char * s1, const char * s2, size_t n)
{
register int n = len;
while (--n >= 0 && *s1 == *s2++)
if (*s1++ == '\0')
return(0);
return(n<0 ? 0 : *s1 - *--s2);
if (!n)
return 0;
do {
if (*s1 != *s2++)
return (*(const unsigned char *)s1 -
*(const unsigned char *)(s2 - 1));
if (!*s1++)
break;
} while (--n);
return 0;
}
char *
{
register char *ret = s1;
while (n && (*s1++ = *s2++))
--n;
/* while (n--) *s1++ = '\0'; */
--n;
if (n > 0) {
bzero(s1, n);
}
register char *ret = s1;
while (*s1)
s1++;
while (n-- && *s2)
*s1++ = *s2++;
*s1 = '\0';
while (n-- && (*s1++ = *s2++));
return ret;
}
char *strcat(char *s1, const char *s2)
{
return(strncat(s1, s2, strlen(s2)));
register char *ret = s1;
while (*s1)
s1++;
while ((*s1++ = *s2++));
return ret;
}
char *strdup(const char *s1)

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Revision: 2333