Function strcspn

src/lib/string.c:127–140

}

size_t strcspn(const char *str, const char *spn)
{
	size_t ret = 0;

	while (*str != 0) {
		const char *p;
		for (p = spn; *p != '\0'; p++)
			if (*p == *str)
				return ret;
		ret++;
		str++;
	}
	return ret;
}

char *strstr(const char *haystack, const char *needle)
{