cc65/test/val/ptrfunc.c

/*
  !!DESCRIPTION!!
  !!ORIGIN!!      SDCC regression tests
  !!LICENCE!!     GPL, read COPYING.GPL
*/

#include <stdio.h>

/* #define SUPPORT_BIT_TYPES */

unsigned char success=0;
unsigned char failures=0;
unsigned char dummy=0;

#ifdef SUPPORT_BIT_TYPES
bit bit0 = 0;
#endif
unsigned int uint0 = 0;
unsigned int uint1 = 0;

/*
 * BUG: if these aren't volatile, an overzealous optimizer or somthing
 * wreaks havoc with the simple tests like "if(uchar != 3)failures++"
 */

#if 0
unsigned char uchar0 = 0;
unsigned char uchar1 = 0;
unsigned char uchar2 = 0;
#else
volatile unsigned char uchar0 = 0;
volatile unsigned char uchar1 = 0;
volatile unsigned char uchar2 = 0;
#endif

void (*pfunc)(void);
void (*p1func)(void);
unsigned char (*pcfunc)(void);

void done()
{
  dummy++;
}

void call0(void)
{
        uchar0++;
}

void call1(void)
{
        uchar1++;
}

unsigned char call2(void)
{
        return uchar0 + 9;
}

void docall0(void)
{
        pfunc = call0;
        (pfunc)();
        if(uchar0 != 1)
                failures++;
}

void docall1()
{
        unsigned char i;
        for(i = 0; i < 3; i++) {
                (*p1func)();
        }
}

void docall2( void(*pf)() )
{
        unsigned char i;
        for(i = 0; i < 2; i++) {
                pf();
        }
}

int  main(void)
{
    docall0();

        p1func = call1;
        docall1();
        if(uchar1 != 3)
                failures++;
        if(uchar0 != 1)
                failures++;

        p1func = call0;
        docall1();
        if(uchar1 != 3)
                failures++;
        if(uchar0 != 4)
                failures++;

        docall2(call0);
        if(uchar1 != 3)
                failures++;
        if(uchar0 != 6)
                failures++;

        docall2(call1);
        if(uchar1 != 5)
                failures++;
        if(uchar0 != 6)
                failures++;

        pcfunc = call2;
        uchar2 = (*pcfunc)();
        if(uchar2 != 15)
                failures++;

        uchar2 += (pcfunc)();
        uchar2 += pcfunc();

        success = failures;
        done();
        printf("failures: %d\n",failures);

        return failures;
}