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/*
!!DESCRIPTION!! pointer test
!!ORIGIN!!
!!LICENCE!! public domain
*/
#include "common.h"
#include <stdio.h>
/*
check behaviour on incompletely declared arrays
*/
char i1[];
void test1(void) {
int a;
a=sizeof(i1[0]);
printf("%04x - ",a);
if(sizeof(i1[0])==sizeof(char)) {
/* gcc gives size of element */
printf("sizeof(i1[0]) gives size of element\n");
}
if(sizeof(i1[0])==sizeof(char*)) {
printf("sizeof(i1[0]) gives size of pointer to element\n");
}
}
/*
check behaviour on string init
*/
char t1[]="abcde";
char t2[]={"abcde"};
char *t3="abcde";
char *t4={"abcde"};
void test2(void) {
char c1,c2,c3,c4;
int i,e=0;
for(i=0;i<5;i++){
c1=t1[i];c2=t2[i];c3=t3[i];c4=t4[i];
/* printf("%02x %02x %02x %02x\n",c1,c2,c3,c4); */
printf("%c %c %c %c\n",c1,c2,c3,c4);
if(!((c1==c2)&(c1==c3)&(c1==c4))) e=1;
}
if(e) printf("test2 failed.\n");
else printf("test2 ok.\n");
}
/*
check behaviour on extern-declarations inside functions
*/
typedef struct {
char *name;
void *func;
} A3;
#ifdef NO_SLOPPY_STRUCT_INIT
A3 a3[] = {
{ "test3", (void*) NULL },
{ "test3", (void*) NULL },
};
#else
/*gcc warning: missing braces around initializer (near initialization for `a3[0]')
this type of struct-initialization seems to be kinda common */
A3 a3[] = {
"test3", (void*) NULL ,
"test3", (void*) NULL ,
};
#endif
void test3a(A3 *list, int number){
printf("%s %d\n",list->name,number);
}
static void test31(void)
{
extern A3 a3[];
test3a(a3, -1);
}
#if 0
/* this variation compiles and works with cc65, but gives an error with gcc :=P */
static void test32(void)
{
extern A3 *a3;
test3a(a3, -1);
}
#endif
static void test30(void)
{
test3a(a3, -1);
}
/*
todo: add test on function pointers in the form of (*func)(arg) ...
cc65 seems to have problems here aswell ;/
*/
int main(void) {
test1();
test2();
test30();
test31();
/* test32(); */
return 0;
}
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