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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
char *
libsimple_stpntolower(char *d, const char *s, size_t n)
{
size_t i;
char *ret;
if (d == s) {
for (; n && *d; d++, n--)
*d = (char)tolower(*d);
return d;
} else if (d < s) {
for (; n && *s; d++, s++, n--)
*d = (char)tolower(*s);
if (n)
*d = '\0';
return d;
} else {
for (i = 0; i < n && s[i]; i++);
ret = &d[i];
if (i != n)
d[i] = (char)tolower(s[i]);
while (i--)
d[i] = (char)tolower(s[i]);
return ret;
}
}
#else
#include "test.h"
int
main(void)
{
char buf[100];
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stpntolower(&buf[3], &buf[0], SIZE_MAX), ""));
assert(!strcmp(buf, "ABCabcdeabcde12345"));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stpntolower(&buf[0], &buf[3], SIZE_MAX), ""));
assert(!strcmp(buf, "deabcde12345"));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stpntolower(&buf[0], &buf[0], SIZE_MAX), ""));
assert(!strcmp(buf, "abcdeabcde12345"));
memset(buf, 0, sizeof(buf));
stpcpy(buf, "ABCDEabcde12345");
buf[18] = 'X';
assert(!strcmpnul(libsimple_stpntolower(&buf[3], &buf[0], 15), "X"));
assert(!strcmp(buf, "ABCabcdeabcde12345X"));
memset(buf, 0, sizeof(buf));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stpntolower(&buf[0], &buf[3], 12), "345"));
assert(!strcmp(buf, "deabcde12345345"));
memset(buf, 0, sizeof(buf));
stpcpy(buf, "ABCDEabcde12345X");
assert(!strcmpnul(libsimple_stpntolower(&buf[0], &buf[0], 15), "X"));
assert(!strcmp(buf, "abcdeabcde12345X"));
memset(buf, 0, sizeof(buf));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stpntolower(&buf[3], &buf[0], 0), "DEabcde12345"));
assert(!strcmp(buf, "ABCDEabcde12345"));
memset(buf, 0, sizeof(buf));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stpntolower(&buf[0], &buf[3], 0), "ABCDEabcde12345"));
assert(!strcmp(buf, "ABCDEabcde12345"));
memset(buf, 0, sizeof(buf));
stpcpy(buf, "ABCDEabcde12345");
assert(!strcmpnul(libsimple_stpntolower(&buf[0], &buf[0], 0), "ABCDEabcde12345"));
assert(!strcmp(buf, "ABCDEabcde12345"));
return 0;
}
#endif
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