memfile.h

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// -*- coding: utf-8-unix -*-
/*
 * Copyright (c) 2021-2025 Daishi Mori (mori0091)
 *
 * This software is released under the MIT License.\n
 * See https://github.com/mori0091/libmsx/blob/main/LICENSE
 *
 * GitHub libmsx project\n
 * https://github.com/mori0091/libmsx
 */
#ifndef MEMFILE_H_
#define MEMFILE_H_
 
#include <bmem.h>
#include <stdbool.h>
#include <stdint.h>
 
#define MEM_SEEK_SET  (0)
 
#define MEM_SEEK_CUR  (1)
 
#define MEM_SEEK_END  (2)
 
typedef struct MemPos mempos_t;
 
typedef struct MemFile MemFile;
 
void mfopen_mem(MemFile * mf, uint8_t * p, size_t size);
 
void mfopen_bmem(MemFile * mf, bmemptr_t p, uint32_t size);
 
void mfslice(MemFile * dst, const MemFile * src, long size);
 
bool mfeof(MemFile * mf);
 
uint8_t mfread_u8(MemFile * mf);
 
size_t mfread(MemFile * mf, void * ptr, size_t size);
 
inline uint16_t mfread_u16(MemFile * mf) {
  uint16_t x;
  mfread(mf, &x, sizeof(x));
  return x;
}
 
inline uint32_t mfread_u32(MemFile * mf) {
  uint32_t x;
  mfread(mf, &x, sizeof(x));
  return x;
}
 
void mfseek(MemFile * mf, long offset, int whence);
 
void mfgetpos(MemFile * mf, mempos_t * pos);
 
void mfsetpos(MemFile * mf, const mempos_t * pos);
 
void mfsetpos2(MemFile * mf, const mempos_t * base, long offset);
 
 
#include "./internal/memfile_types.h"
 
#endif // MEMFILE_H_