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Implement the strstr function

Thu, 09/07/2006 - 20:39 — geekgod

Implement the strstr function as efficiently as you can..
How do you handle errors if you had to

‹ Implement the strtok function Implement the strncmp function ›
Mon, 03/19/2007 - 01:47 — Pooja

Implement the strstr function

char *
strstr (const char *haystack, const char *needle)
{
char *result = (char *)NULL;

if ((haystack != (char *)NULL) && (needle != (char *)NULL))
{
register int i;
int hl = strlen (haystack);
int nl = strlen (needle);

for (i = 0; i < (hl - nl); i++)
if (strncmp (haystack + i, needle, nl) == 0)
{
result = haystack + i;
break;
}
}

return (result);
}