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/* Copyright (C) 2000 Free Software Foundation.
Ensure all expected transformations of builtin strncpy occur and
perform correctly.
Written by Kaveh R. Ghazi, 11/25/2000. */
extern void abort (void);
typedef __SIZE_TYPE__ size_t;
extern char *strncpy (char *, const char *, size_t);
extern int strcmp (const char *, const char *);
extern int strncmp (const char *, const char *, size_t);
extern void *memset (void *, int, size_t);
int i;
int main ()
{
const char *const src = "hello world";
const char *src2;
char dst[64], *dst2;
memset (dst, 0, sizeof (dst));
if (strncpy (dst, src, 4) != dst || strncmp (dst, src, 4))
abort();
memset (dst, 0, sizeof (dst));
if (strncpy (dst+16, src, 4) != dst+16 || strncmp (dst+16, src, 4))
abort();
memset (dst, 0, sizeof (dst));
if (strncpy (dst+32, src+5, 4) != dst+32 || strncmp (dst+32, src+5, 4))
abort();
memset (dst, 0, sizeof (dst));
dst2 = dst;
if (strncpy (++dst2, src+5, 4) != dst+1 || strncmp (dst2, src+5, 4)
|| dst2 != dst+1)
abort();
memset (dst, 0, sizeof (dst));
if (strncpy (dst, src, 0) != dst || strcmp (dst, ""))
abort();
memset (dst, 0, sizeof (dst));
dst2 = dst; src2 = src;
if (strncpy (++dst2, ++src2, 0) != dst+1 || strcmp (dst2, "")
|| dst2 != dst+1 || src2 != src+1)
abort();
memset (dst, 0, sizeof (dst));
dst2 = dst; src2 = src;
if (strncpy (++dst2+5, ++src2+5, 0) != dst+6 || strcmp (dst2+5, "")
|| dst2 != dst+1 || src2 != src+1)
abort();
memset (dst, 0, sizeof (dst));
if (strncpy (dst, src, 12) != dst || strcmp (dst, src))
abort();
/* Test at least one instance of the __builtin_ style. We do this
to ensure that it works and that the prototype is correct. */
memset (dst, 0, sizeof (dst));
if (__builtin_strncpy (dst, src, 4) != dst || strncmp (dst, src, 4))
abort();
memset (dst, 0, sizeof (dst));
if (strncpy (dst, i++ ? "xfoo" + 1 : "bar", 4) != dst
|| strcmp (dst, "bar")
|| i != 1)
abort ();
return 0;
}
#ifdef __OPTIMIZE__
/* When optimizing, all the above cases should be transformed into
something else. So any remaining calls to the original function
should abort. */
__attribute__ ((noinline))
static char *
strncpy(char *s1, const char *s2, size_t n)
{
abort();
}
#endif
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