#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "memstream.h"

void memstream_init(struct memstream* s, int fd, void* buffer, size_t len)
{
	s->file = fd;
	s->data = buffer;
	s->pos = 0;
	s->capa = len;
}

void memstream_flush(struct memstream* s)
{
	write(s->file, s->data, s->pos);
	s->pos = 0;
}

void memstream_write(struct memstream* s, void* source, size_t len)
{
	unsigned char* data = source;

	if (s->pos + len > s->capa)
	{
		memstream_flush(s);
	}

	memcpy(s->data + s->pos, data, len);
	s->pos += len;
}

void memstream_puts(struct memstream* s, const char* str)
{
	memstream_write(s, (void*) str, strlen(str));
}