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Diffstat (limited to 'src/w_file_stdc.c')
-rw-r--r-- | src/w_file_stdc.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/w_file_stdc.c b/src/w_file_stdc.c new file mode 100644 index 00000000..04450e8b --- /dev/null +++ b/src/w_file_stdc.c @@ -0,0 +1,104 @@ +// 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, +}; + + |