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#include <stdlib.h>
#include "foo.h"
size_t foo_strlen(const char *src)
{
size_t size = 0;
for (; *src; ++src)
++size;
return size;
}
char *foo_strcpy(char *restrict dst, const char *restrict src)
{
char *ret = dst;
for (; *src; ++src, ++dst)
*dst = *src;
/* this is buggy for the purpose of this sample: the commented line below
* should be uncommented for all the tests to pass correctly. */
//*dst = 0;
return ret;
}
char *foo_strdup(const char *src)
{
/* This implementation does not handle NULL at all: the commented line
* below should be uncommented for all the tests to pass correctly. */
//if (!src) return NULL;
char *out = malloc(foo_strlen(src) + 1);
return out ? foo_strcpy(out, src) : NULL;
}
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