Tibor Nagy
d1a424c002
This will allow us to redefine the exit function.
For example:
```
#define exit(code) { \
fprintf(stderr, "%s:%d: exit(%s) in function ‘%s’\n",
__FILE__, __LINE__, #code, __func__); \
_exit(code); \
}
```
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int main(void) {
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puts("# mem #");
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char arr[100];
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memset(arr, 0, 100); // Compiler builtin, should work
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arr[50] = 1;
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if ((size_t)memchr((void *)arr, 1, 100) - (size_t)arr != 50) {
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puts("Incorrect memchr");
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exit(EXIT_FAILURE);
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}
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puts("Correct memchr");
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char arr2[51];
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memset(arr2, 0, 51); // Compiler builtin, should work
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memccpy((void *)arr2, (void *)arr, 1, 100);
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if (arr[50] != 1) {
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puts("Incorrect memccpy");
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exit(EXIT_FAILURE);
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}
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puts("Correct memccpy");
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int res;
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if ((res = memcmp("hello world", "hello world", 11))) {
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printf("Incorrect memcmp (1), expected 0 found %d\n", res);
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exit(EXIT_FAILURE);
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}
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if ((res = memcmp("hello world", "hello worlt", 11)) >= 0) {
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printf("Incorrect memcmp (2), expected -, found %d\n", res);
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exit(EXIT_FAILURE);
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}
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if ((res = memcmp("hello world", "hallo world", 5)) <= 0) {
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printf("Incorrect memcmp (3), expected +, found %d\n", res);
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exit(EXIT_FAILURE);
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}
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if ((res = memcmp("hello world", "henlo world", 5)) >= 0) {
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printf("Incorrect memcmp (4), expected -, found %d\n", res);
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exit(EXIT_FAILURE);
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}
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puts("Correct memcmp");
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}
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