kopia lustrzana https://github.com/Jean-MarcHarvengt/MCUME
94 wiersze
1.8 KiB
C
94 wiersze
1.8 KiB
C
//
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// Copyright(C) 1993-1996 Id Software, Inc.
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// Copyright(C) 2005-2014 Simon Howard
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// DESCRIPTION:
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// WAD I/O functions.
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//
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#include <stdio.h>
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#include "config.h"
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#include "doomtype.h"
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#include "m_argv.h"
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#include "w_file.h"
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#undef _WIN32
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extern wad_file_class_t stdc_wad_file;
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#ifdef _WIN32
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extern wad_file_class_t win32_wad_file;
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#endif
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#ifdef HAVE_MMAP
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extern wad_file_class_t posix_wad_file;
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#endif
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static wad_file_class_t *wad_file_classes[] =
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{
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#ifdef _WIN32
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&win32_wad_file,
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#endif
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#ifdef HAVE_MMAP
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&posix_wad_file,
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#endif
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&stdc_wad_file,
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};
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wad_file_t *W_OpenFile(char *path)
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{
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wad_file_t *result;
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int i;
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//!
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// Use the OS's virtual memory subsystem to map WAD files
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// directly into memory.
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//
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if (!M_CheckParm("-mmap"))
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{
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return stdc_wad_file.OpenFile(path);
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}
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// Try all classes in order until we find one that works
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result = NULL;
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for (i = 0; i < arrlen(wad_file_classes); ++i)
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{
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result = wad_file_classes[i]->OpenFile(path);
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if (result != NULL)
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{
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break;
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}
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}
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return result;
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}
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void W_CloseFile(wad_file_t *wad)
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{
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wad->file_class->CloseFile(wad);
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}
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size_t W_Read(wad_file_t *wad, unsigned int offset,
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void *buffer, size_t buffer_len)
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{
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return wad->file_class->Read(wad, offset, buffer, buffer_len);
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}
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