#include <stdint.h>
#include <errno.h>

#include "main.h"

extern int _heap_start;
extern int _heap_end;
static void *_old_heap = &_heap_start;

int _write(int handle, char *data, int size) {
    int count;
    handle = handle;
    xilinx_uartlite_send(&soc_uart, data, size);
    return size;
}

void *_sbrk(int nbytes) {
    char *_old = _old_heap;
    if(&_heap_start == &_heap_end) {
        errno = -ENOMEM;
        return (void *)-1;
    }
    if((_old + nbytes) < (char *)&_heap_end) {
        _old += nbytes;
    } else {
        errno = -ENOMEM;
        return (void *)-1;
    }
}