ref: b8d2bc344705ae3c530da783db45b3fefb94a5b3
dir: /src/w_file.h/
// // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 2005-2014 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // DESCRIPTION: // WAD I/O functions. // #ifndef __W_FILE__ #define __W_FILE__ #include <stdio.h> #include "doomtype.h" typedef struct _wad_file_s wad_file_t; typedef struct { // Open a file for reading. wad_file_t *(*OpenFile)(const char *path); // Close the specified file. void (*CloseFile)(wad_file_t *file); // Read data from the specified position in the file into the // provided buffer. Returns the number of bytes read. size_t (*Read)(wad_file_t *file, unsigned int offset, void *buffer, size_t buffer_len); } wad_file_class_t; extern wad_file_class_t stdc_wad_file; #ifdef _WIN32 extern wad_file_class_t win32_wad_file; #endif #ifdef HAVE_MMAP extern wad_file_class_t posix_wad_file; #endif struct _wad_file_s { // Class of this file. wad_file_class_t *file_class; // If this is NULL, the file cannot be mapped into memory. If this // is non-NULL, it is a pointer to the mapped file. byte *mapped; // Length of the file, in bytes. unsigned int length; // File's location on disk. const char *path; }; // Open the specified file. Returns a pointer to a new wad_file_t // handle for the WAD file, or NULL if it could not be opened. wad_file_t *W_OpenFile(const char *path); // Close the specified WAD file. void W_CloseFile(wad_file_t *wad); // Read data from the specified file into the provided buffer. The // data is read from the specified offset from the start of the file. // Returns the number of bytes read. size_t W_Read(wad_file_t *wad, unsigned int offset, void *buffer, size_t buffer_len); #endif /* #ifndef __W_FILE__ */