#include "chibicc-uxn/varvara.h"

char mem[100];
unsigned mem_length;

char *
aalloc(unsigned size)
{
	unsigned pos = mem_length;
	mem_length += size;
	return (char *)&mem[pos];
}

void
afree()
{
	mem_length = 0;
}

char *
amcpy(char *from, unsigned length)
{
    unsigned total = length + sizeof(unsigned);
    char *ptr = aalloc(total);

    ptr[0] = (char)(length & 0xff);
    ptr[1] = (char)((length >> 8) & 0xff);

    for (unsigned i = 0; i < length; i++) {
        ptr[i + sizeof(unsigned)] = from[i];
    }

    return ptr;
}

char* nat_to_str(unsigned n) {
	char buffer[5];
	unsigned i = 5;
  
    do {
        buffer[--i] = '0' + n % 10;
        n /= 10;
    } while(n > 0);

   return amcpy(buffer + i, 5 - i);
}