void print_memory(const void* mem, int size){
	#define BYTES_PER_LINE 16
	const char* ptr = (const char*)mem;
	for ( int i = 0; i < (size + BYTES_PER_LINE - 1) / BYTES_PER_LINE; i++ ){
		printf("%04x|", i * BYTES_PER_LINE);
		for ( int j = 0; j < BYTES_PER_LINE; j++ ){
			int addr = i * BYTES_PER_LINE + j;
			if ( addr < size ){
				printf(" %02x", (int)(unsigned char)ptr[addr]);
			}
		}
		printf("\n");
	}
}