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142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
/*
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* file_lib.c
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* File functions to emulate MACT
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*
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* by Jonathon Fowler
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*
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* Since we weren't given the source for MACT386.LIB so I've had to do some
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* creative interpolation here.
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*
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*/
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//-------------------------------------------------------------------------
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/*
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Duke Nukem Copyright (C) 1996, 2003 3D Realms Entertainment
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This file is part of Duke Nukem 3D version 1.5 - Atomic Edition
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Duke Nukem 3D 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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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.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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//-------------------------------------------------------------------------
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#include <stdlib.h>
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#ifndef _MSC_VER
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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#include <errno.h>
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#include "compat.h"
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#include "file_lib.h"
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#include "cache1d.h"
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#include "baselayer.h"
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifndef O_TEXT
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#define O_TEXT 0
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#endif
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#ifndef F_OK
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#define F_OK 0
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#endif
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#define MaxFiles 20
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static char *FileNames[MaxFiles];
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int32_t SafeOpen(const char *filename, int32_t mode, int32_t sharemode)
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{
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int32_t h;
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h = openfrompath(filename, mode, sharemode);
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if (h < 0)
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{
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initprintf("Error opening %s: %s", filename, strerror(errno));
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return h;
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}
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if (h < MaxFiles)
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{
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Bfree(FileNames[h]);
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FileNames[h] = (char*)Xmalloc(strlen(filename)+1);
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strcpy(FileNames[h], filename);
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}
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return h;
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}
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int32_t SafeOpenRead(const char *filename, int32_t filetype)
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{
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switch (filetype)
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{
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case filetype_binary:
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return SafeOpen(filename, O_RDONLY|O_BINARY, BS_IREAD);
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case filetype_text:
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return SafeOpen(filename, O_RDONLY|O_TEXT, BS_IREAD);
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default:
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initprintf("SafeOpenRead: Illegal filetype specified");
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return -1;
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}
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}
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void SafeClose(int32_t handle)
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{
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if (handle < 0) return;
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if (close(handle) < 0)
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{
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if (handle < MaxFiles)
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initprintf("Unable to close file %s", FileNames[handle]);
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else
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initprintf("Unable to close file");
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return;
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}
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if (handle < MaxFiles && FileNames[handle])
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{
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DO_FREE_AND_NULL(FileNames[handle]);
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}
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}
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int32_t SafeFileExists(const char *filename)
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{
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if (!access(filename, F_OK)) return TRUE;
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return FALSE;
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}
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int32_t SafeFileLength(int32_t handle)
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{
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if (handle < 0) return -1;
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return Bfilelength(handle);
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}
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void SafeRead(int32_t handle, void *buffer, int32_t count)
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{
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int32_t b;
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b = read(handle, buffer, count);
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if (b != count)
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{
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close(handle);
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if (handle < MaxFiles)
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initprintf("File read failure %s reading %d bytes from file %s.",
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strerror(errno), count, FileNames[handle]);
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else
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initprintf("File read failure %s reading %d bytes.",
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strerror(errno), count);
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return;
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}
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}
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