| /* 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 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(); |
| |
| 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. */ |
| static char * |
| strncpy(char *s1, const char *s2, size_t n) |
| { |
| abort(); |
| } |
| #endif |