mirror of https://github.com/cc65/cc65.git
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
|
|
** !!DESCRIPTION!! Simple tests of pointer-to-array dereferences
|
|
** !!ORIGIN!! cc65 regression tests
|
|
** !!LICENCE!! Public Domain
|
|
** !!AUTHOR!! 2015-06-29, Greg King
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
static unsigned char failures = 0;
|
|
static size_t Size;
|
|
|
|
typedef unsigned char array_t[4][4];
|
|
|
|
static array_t table = {
|
|
{12, 13, 14, 15},
|
|
{ 8, 9, 10, 11},
|
|
{ 4, 5, 6, 7},
|
|
{ 0, 1, 2, 3}
|
|
};
|
|
static array_t *tablePtr = &table;
|
|
|
|
static unsigned (*vector)[2];
|
|
|
|
static unsigned char y = 0, x;
|
|
|
|
int main(void)
|
|
{
|
|
/* The indirection must convert the expression-type (from Pointer into
|
|
** Array); but, it must not convert the value, because it already points
|
|
** to the start of the array.
|
|
*/
|
|
/* (Note: I reduce output clutter by using a variable to prevent
|
|
** compiler warnings about constant comparisons and unreachable code.
|
|
*/
|
|
if ((Size = sizeof *tablePtr) != sizeof table) {
|
|
++failures;
|
|
}
|
|
if (*tablePtr != table) {
|
|
++failures;
|
|
}
|
|
|
|
/* Test fetching. */
|
|
do {
|
|
x = 0;
|
|
do {
|
|
if ((*tablePtr)[y][x] != table[y][x]) {
|
|
++failures;
|
|
printf("(*tableptr)[%u][%u] (%u) != table[%u][%u] (%u).\n",
|
|
y, x, (*tablePtr)[y][x],
|
|
y, x, table[y][x]);
|
|
}
|
|
} while (++x < sizeof table[0]);
|
|
} while (++y < sizeof table / sizeof table[0]);
|
|
|
|
vector = (unsigned (*)[])table[1];
|
|
if ((*vector)[1] != 0x0B0A) {
|
|
++failures;
|
|
}
|
|
|
|
/* Test storing. */
|
|
(*tablePtr)[2][1] = 42;
|
|
if (table[2][1] != 42) {
|
|
++failures;
|
|
printf("table[2][1] == %u (should have changed from 5 to 42).\n",
|
|
table[2][1]);
|
|
}
|
|
x = 3;
|
|
y = 1;
|
|
(*tablePtr)[y][x] = 83;
|
|
if (table[1][3] != 83) {
|
|
++failures;
|
|
printf("table[y][x] == %u (should have changed from 11 to 83).\n",
|
|
table[1][3]);
|
|
}
|
|
|
|
/* Test triple indirection. It should compile to two indirection
|
|
** operations.
|
|
*/
|
|
--***tablePtr;
|
|
if (**table != 11) {
|
|
++failures;
|
|
printf("**table == %u (should have changed from 12 to 11).\n",
|
|
table[0][0]);
|
|
}
|
|
|
|
if (failures != 0) {
|
|
printf("failures: %u\n", failures);
|
|
}
|
|
return failures;
|
|
}
|