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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
void *
libsimple_memptolower(void *d_, const void *s_, size_t n)
{
char *ret, *d = d_;
const char *s = s_;
if (d == s) {
for (; n; d++, n--)
*d = (char)tolower(*d);
return d;
} else if (d < s) {
for (; n; d++, s++, n--)
*d = (char)tolower(*s);
return d;
} else {
ret = &d[n];
while (n) {
n--;
d[n] = (char)tolower(s[n]);
}
return ret;
}
}
#else
#include "test.h"
int
main(void)
{
char buf[100];
stpcpy(buf, "ABCDEabcde12345");
assert(libsimple_memptolower(&buf[3], &buf[0], 16) == &buf[19]);
assert(!strcmp(buf, "ABCabcdeabcde12345"));
stpcpy(buf, "ABCDEabcde12345");
assert(libsimple_memptolower(&buf[0], &buf[3], 13) == &buf[13]);
assert(!strcmp(buf, "deabcde12345"));
stpcpy(buf, "ABCDEabcde12345");
assert(libsimple_memptolower(&buf[0], &buf[0], 16) == &buf[16]);
assert(!strcmp(buf, "abcdeabcde12345"));
return 0;
}
#endif
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