/* Copyright (C) 2000 Free Software Foundation. Ensure all expected transformations of builtin strchr and index occur and perform correctly. Written by Jakub Jelinek, 11/7/2000. */ extern void abort (void); extern char *strchr (const char *, int); extern char *index (const char *, int); int main() { const char *const foo = "hello world"; if (strchr (foo, 'x')) abort (); if (strchr (foo, 'o') != foo + 4) abort (); if (strchr (foo + 5, 'o') != foo + 7) abort (); if (strchr (foo, '\0') != foo + 11) abort (); /* Test only one instance of index since the code path is the same as that of strchr. */ if (index ("hello", 'z') != 0) abort (); /* Test at least one instance of the __builtin_ style. We do this to ensure that it works and that the prototype is correct. */ if (__builtin_strchr (foo, 'o') != foo + 4) abort (); if (__builtin_index (foo, 'o') != foo + 4) abort (); return 0; } static char * index (const char *s, int c) { /* For systems which don't have index, we ensure no link failures occur by always providing a backup definition. During optimization this function aborts to catch errors. */ #ifdef __OPTIMIZE__ abort (); #else return strchr(s, c); #endif } #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 * strchr (const char *s, int c) { abort (); } #endif