#ifndef TESTING

/* for caddr_t (typedef char * caddr_t;) */
#include <sys/types.h>
#include <stddef.h>

extern int  __HEAP_START;

extern "C" caddr_t _sbrk ( int incr ){
	static unsigned char *heap = NULL;
	unsigned char *prev_heap;

	if (heap == NULL) {
		heap = (unsigned char *)&__HEAP_START;
	}
	prev_heap = heap;
	/* check removed to show basic approach */

	heap += incr;

	return (caddr_t) prev_heap;
}

extern "C" void __cxa_pure_virtual() {
	// Error handling here
}

#endif