ref: 25374dee58942b20a38f446074667e7dbb297b5a
dir: /src/w_file_stdc.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 2008 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. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // // DESCRIPTION: // WAD I/O functions. // //----------------------------------------------------------------------------- #include <stdio.h> #include "m_misc.h" #include "w_file.h" #include "z_zone.h" typedef struct { wad_file_t wad; FILE *fstream; } stdc_wad_file_t; extern wad_file_class_t stdc_wad_file; static wad_file_t *W_StdC_OpenFile(char *path) { stdc_wad_file_t *result; FILE *fstream; fstream = fopen(path, "rb"); if (fstream == NULL) { return NULL; } // Create a new stdc_wad_file_t to hold the file handle. result = Z_Malloc(sizeof(stdc_wad_file_t), PU_STATIC, 0); result->wad.file_class = &stdc_wad_file; result->wad.mapped = NULL; result->wad.length = M_FileLength(fstream); result->fstream = fstream; return &result->wad; } static void W_StdC_CloseFile(wad_file_t *wad) { stdc_wad_file_t *stdc_wad; stdc_wad = (stdc_wad_file_t *) wad; fclose(stdc_wad->fstream); Z_Free(stdc_wad); } // Read data from the specified position in the file into the // provided buffer. Returns the number of bytes read. size_t W_StdC_Read(wad_file_t *wad, unsigned int offset, void *buffer, size_t buffer_len) { stdc_wad_file_t *stdc_wad; size_t result; stdc_wad = (stdc_wad_file_t *) wad; // Jump to the specified position in the file. fseek(stdc_wad->fstream, offset, SEEK_SET); // Read into the buffer. result = fread(buffer, 1, buffer_len, stdc_wad->fstream); return result; } wad_file_class_t stdc_wad_file = { W_StdC_OpenFile, W_StdC_CloseFile, W_StdC_Read, };