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#include <ctype.h>
#include <stdlib.h>
#include <string.h>
char *strdup(const char *s)
{
size_t len = strlen(s);
char *new = malloc(len + 1);
if (!new)
return 0;
memcpy(new, s, len);
new[len] = '\0';
return new;
}
char *strndup(const char *s, size_t n)
{
size_t len = strlen(s);
if (n < len)
len = n;
char *new = malloc(len + 1);
if (!new)
return 0;
memcpy(new, s, len);
new[len] = '\0';
return new;
}
int strcasecmp(const char *s1, const char *s2)
{
int i;
while ((i = tolower(*s1)) && i == tolower(*s2))
s1++, s2++;
return ((unsigned char) tolower(*s1) - (unsigned char) tolower(*s2));
}
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