CToolBox/src/toolbox/vptr.c

#include "toolbox/vptr.h"

#include "toolbox/errno.h"
#include "toolbox/log.h"



#define true ((unsigned char) 1L)
#define false ((unsigned char) 0L)

#define DEREF(PTR, POS) (*(((unsigned char *) (PTR)) + POS))

#define TEST_FOR_NULL(POINTER, RET)					\
	if ( POINTER == NULL ) {					\
		LOG_ERROR("Null Pointer Not Expected");		\
		toolbox_errno = RET_EVN;				\
		return RET;						\
	}

_Bool
vptr_equal(const struct vptr *restrict p_vptr1
	   , const struct vptr *restrict p_vptr2) {
	toolbox_errno = RET_OK;

	TEST_FOR_NULL(p_vptr1, false);
	TEST_FOR_NULL(p_vptr2, false);

	TEST_FOR_NULL(p_vptr1->data, false);
	TEST_FOR_NULL(p_vptr2->data, false);

	if ( p_vptr1->size != p_vptr2->size )
		return false;

	for ( size_t z = 0; z < p_vptr1->size; ++z ) {
		if ( DEREF(p_vptr1->data, z) != DEREF(p_vptr2->data, z) )
			return false;
	}

	return true;

}

#undef TEST_FOR_NULL
#undef DEREF

#undef false
#undef true