M7350/system/core/libacc/tests/data/casts.c
2024-09-09 08:52:07 +00:00

86 lines
1.8 KiB
C

void test1() {
int a = 3;
int* pb = &a;
int c = *pb;
printf("Reading from a pointer: %d %d\n", a, c);
*pb = 4;
printf("Writing to a pointer: %d\n", a);
printf("Testing casts: %d %g %g %d\n", 3, (float) 3, 4.5, (int) 4.5);
}
void test2() {
int x = 4;
int px = &x;
// int z = * px; // An error, expected a pointer type
int y = * (int*) px;
printf("Testing reading (int*): %d\n", y);
}
void test3() {
int px = (int) malloc(120);
* (int*) px = 8;
* (int*) (px + 4) = 9;
printf("Testing writing (int*): %d %d\n", * (int*) px, * (int*) (px + 4));
free((void*) px);
}
void test4() {
int x = 0x12345678;
int px = &x;
int a = * (char*) px;
int b = * (char*) (px + 1);
int c = * (char*) (px + 2);
int d = * (char*) (px + 3);
printf("Testing reading (char*): 0x%02x 0x%02x 0x%02x 0x%02x\n", a, b, c, d);
}
void test5() {
int x = 0xFFFFFFFF;
int px = &x;
* (char*) px = 0x21;
* (char*) (px + 1) = 0x43;
* (char*) (px + 2) = 0x65;
* (char*) (px + 3) = 0x87;
printf("Testing writing (char*): 0x%08x\n", x);
}
int f(int b) {
printf("f(%d)\n", b);
return 7 * b;
}
void test6() {
int fp = &f;
int x = (*(int(*)()) fp)(10);
printf("Function pointer result: %d\n", x);
}
void test7() {
int px = (int) malloc(120);
* (float*) px = 8.8f;
* (float*) (px + 4) = 9.9f;
printf("Testing read/write (float*): %g %g\n", * (float*) px, * (float*) (px + 4));
free((void*) px);
}
void test8() {
int px = (int) malloc(120);
* (double*) px = 8.8;
* (double*) (px + 8) = 9.9;
printf("Testing read/write (double*): %g %g\n", * (double*) px, * (double*) (px + 8));
free((void*) px);
}
int main() {
test1();
test2();
test3();
test4();
test5();
test6();
test7();
test8();
return 0;
}