/* ioapi_mem.h -- IO base function header for compress/uncompress .zip
   files using zlib + zip or unzip API

   This version of ioapi is designed to access memory rather than files.
   We do use a region of memory to put data in to and take it out of.

   Copyright (C) 2012-2017 Nathan Moinvaziri (https://github.com/nmoinvaz/minizip)
             (C) 2003 Justin Fletcher
             (C) 1998-2003 Gilles Vollant

   This program is distributed under the terms of the same license as zlib.
   See the accompanying LICENSE file for the full text of the license.
 */

#ifndef _IOAPI_MEM_H
#define _IOAPI_MEM_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "zlib.h"
#include "ioapi.h"

#ifdef __cplusplus
extern "C" {
#endif

voidpf ZCALLBACK fopen_mem_func(voidpf opaque, const char* filename, int mode);
voidpf ZCALLBACK fopendisk_mem_func(voidpf opaque, voidpf stream, uint32_t number_disk, int mode);
uint32_t ZCALLBACK fread_mem_func(voidpf opaque, voidpf stream, void* buf, uint32_t size);
uint32_t ZCALLBACK fwrite_mem_func(voidpf opaque, voidpf stream, const void* buf, uint32_t size);
long ZCALLBACK ftell_mem_func(voidpf opaque, voidpf stream);
long ZCALLBACK fseek_mem_func(voidpf opaque, voidpf stream, uint32_t offset, int origin);
int ZCALLBACK fclose_mem_func(voidpf opaque, voidpf stream);
int ZCALLBACK ferror_mem_func(voidpf opaque, voidpf stream);

typedef struct ourmemory_s {
	char *base;      /* Base of the region of memory we're using */
	uint32_t size;   /* Size of the region of memory we're using */
	uint32_t limit;  /* Furthest we've written */
	uint32_t cur_offset; /* Current offset in the area */
	int grow;        /* Growable memory buffer */
} ourmemory_t;

void fill_memory_filefunc(zlib_filefunc_def* pzlib_filefunc_def, ourmemory_t *ourmem);

#ifdef __cplusplus
}
#endif

#endif