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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
char *
libsimple_stptolower(char *d, const char *s)
{
size_t n;
char *ret;
if (d == s) {
for (; *d; d++)
*d = (char)tolower(*d);
return d;
} else if (d < s) {
for (; *s; d++, s++)
*d = (char)tolower(*s);
*d = '\0';
return d;
} else {
for (n = 0; s[n]; n++);
ret = &d[n];
do {
d[n] = (char)tolower(s[n]);
} while (n--);
return ret;
}
}
#else
#include "test.h"
int
main(void)
{
char buf[100];
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stptolower(&buf[3], &buf[0]), ""));
assert(!strcmp(buf, "ABCabcdeabcde12345"));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stptolower(&buf[0], &buf[3]), ""));
assert(!strcmp(buf, "deabcde12345"));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stptolower(&buf[0], &buf[0]), ""));
assert(!strcmp(buf, "abcdeabcde12345"));
return 0;
}
#endif
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