stream.h

#pragma once

#include <stdint.h>
#include <stdio.h>

#include "buffer.h"

struct stream {
	size_t position;
	int _errno;

	size_t (*read)(struct stream *, void *ptr, size_t size);
	size_t (*write)(struct stream *, void *ptr, size_t size);
	size_t (*seek)(struct stream *, long offset, int whence);
	int (*eof)(struct stream *);
	long (*tell)(struct stream *);
};

size_t stream_seek(struct stream *stream, long offset, int whence);
uint8_t stream_read_uint8(struct stream *stream);
uint16_t stream_read_big_uint16(struct stream *stream);
uint32_t stream_read_big_uint32(struct stream *stream);
ssize_t stream_write(struct stream *stream, void *ptr, size_t size);
ssize_t stream_write_buffer(struct stream *stream, struct buffer *buffer);
ssize_t stream_write_uint8(struct stream *stream, uint8_t i);
ssize_t stream_write_big_uint16(struct stream *stream, uint16_t i);
ssize_t stream_write_big_uint32(struct stream *stream, uint32_t i);
int stream_read_compare(struct stream *stream, const void *data, int len);
int stream_eof(struct stream *stream);
long stream_tell(struct stream *stream);

struct mem_stream {
	struct stream stream;
	struct buffer *buffer;
};
int mem_stream_init(struct mem_stream *stream, struct buffer *buffer);
int mem_stream_destroy(struct mem_stream *stream);

struct file_stream {
	struct stream stream;

	FILE *f;
};
int file_stream_init(struct file_stream *stream, char *filename, const char *mode);
int file_stream_destroy(struct file_stream *stream);