raze-gles/polymer/eduke32/source/jmact/file_lib.c

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/*
* file_lib.c
* File functions to emulate MACT
*
* by Jonathon Fowler
*
* Since we weren't given the source for MACT386.LIB so I've had to do some
* creative interpolation here.
*
*/
//-------------------------------------------------------------------------
/*
Duke Nukem Copyright (C) 1996, 2003 3D Realms Entertainment
This file is part of Duke Nukem 3D version 1.5 - Atomic Edition
Duke Nukem 3D 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.
*/
//-------------------------------------------------------------------------
#include <stdlib.h>
#ifndef _MSC_VER
#include <unistd.h>
#endif
#include <fcntl.h>
#include <errno.h>
#include "compat.h"
#include "types.h"
#include "file_lib.h"
#include "util_lib.h"
#include "cache1d.h"
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef O_TEXT
#define O_TEXT 0
#endif
#ifndef F_OK
#define F_OK 0
#endif
#define MaxFiles 20
static char *FileNames[MaxFiles];
int32 SafeOpen(const char *filename, int32 mode, int32 sharemode)
{
int32 h;
h = openfrompath(filename, mode, sharemode);
if (h < 0) Error("Error opening %s: %s", filename, strerror(errno));
if (h < MaxFiles) {
if (FileNames[h]) SafeFree(FileNames[h]);
FileNames[h] = (char*)SafeMalloc(strlen(filename)+1);
if (FileNames[h]) strcpy(FileNames[h], filename);
}
return h;
}
int32 SafeOpenRead(const char *filename, int32 filetype)
{
switch (filetype) {
case filetype_binary:
return SafeOpen(filename, O_RDONLY|O_BINARY, S_IREAD);
case filetype_text:
return SafeOpen(filename, O_RDONLY|O_TEXT, S_IREAD);
default:
Error("SafeOpenRead: Illegal filetype specified");
return -1;
}
}
void SafeClose ( int32 handle )
{
if (handle < 0) return;
if (close(handle) < 0) {
if (handle < MaxFiles)
Error("Unable to close file %s", FileNames[handle]);
else
Error("Unable to close file");
}
if (handle < MaxFiles && FileNames[handle]) {
SafeFree(FileNames[handle]);
FileNames[handle] = NULL;
}
}
boolean SafeFileExists(const char *filename)
{
if (!access(filename, F_OK)) return true;
return false;
}
int32 SafeFileLength ( int32 handle )
{
if (handle < 0) return -1;
return Bfilelength(handle);
}
void SafeRead(int32 handle, void *buffer, int32 count)
{
int32 b;
b = read(handle, buffer, count);
if (b != count) {
close(handle);
if (handle < MaxFiles)
Error("File read failure %s reading %d bytes from file %s.",
strerror(errno), count, FileNames[handle]);
else
Error("File read failure %s reading %d bytes.",
strerror(errno), count);
}
}