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/* ISC license. */
#include <skalibs/config.h>
#include <skalibs/bytestr.h>
#ifdef SKALIBS_FLAG_REPLACE_LIBC
/* Very naive implementation, but it's small. */
unsigned int str_strn (char const *haystack, unsigned int hlen, char const *needle, unsigned int nlen)
{
register unsigned int i = 0 ;
if (!nlen) return 0 ;
if (hlen < nlen) return hlen ;
hlen -= nlen ;
for (; i <= hlen ; i++)
if (!byte_diff(haystack+i, nlen, needle)) return i ;
return hlen+nlen ;
}
#else
#include <string.h>
unsigned int str_strn (char const *haystack, unsigned int hlen, char const *needle, unsigned int nlen)
{
char haystack2[hlen+1] ;
char needle2[nlen+1] ;
register char *p ;
byte_copy(haystack2, hlen, haystack) ; haystack2[hlen] = 0 ;
byte_copy(needle2, nlen, needle) ; needle2[nlen] = 0 ;
p = strstr(haystack2, needle2) ;
return p ? p - haystack2 : hlen ;
}
#endif
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