753 lines
15 KiB
C
753 lines
15 KiB
C
/* $Id: cfile.c,v 1.32 2004-10-23 16:28:32 schaffner Exp $ */
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/*
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THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
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ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
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SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
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FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
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COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
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*/
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/*
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*
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* Functions for accessing compressed files.
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* (Actually, the files are not compressed, but concatenated within hogfiles)
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <conf.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#ifdef _WIN32_WCE
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# include <windows.h>
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#elif defined(macintosh)
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# include <Files.h>
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# include <CFURL.h>
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#else
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# include <sys/stat.h>
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#endif
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#include "pstypes.h"
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#include "u_mem.h"
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#include "strutil.h"
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#include "d_io.h"
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#include "error.h"
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#include "cfile.h"
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#include "byteswap.h"
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/* a file (if offset == 0) or a part of a hog file */
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struct CFILE {
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FILE *file;
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int size;
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int offset;
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int raw_position;
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};
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struct file_in_hog {
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char name[13];
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int offset;
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int length;
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};
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#define MAX_FILES_IN_HOG 300
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/* a hog file is an archive, like a tar file */
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typedef struct {
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char filename[64];
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int num_files;
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struct file_in_hog files[MAX_FILES_IN_HOG];
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} hog;
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hog *builtin_hog = NULL;
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hog *alt_hog = NULL;
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hog *d1_hog = NULL;
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void free_builtin_hog() { if (builtin_hog) d_free (builtin_hog); }
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void free_alt_hog() { if (alt_hog) d_free (alt_hog); }
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void free_d1_hog() { if (d1_hog) d_free (d1_hog); }
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char AltHogDir[64];
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char AltHogdir_initialized = 0;
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// routine to take a DOS path and turn it into a macintosh
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// pathname. This routine is based on the fact that we should
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// see a \ character in the dos path. The sequence .\ a tthe
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// beginning of a path is turned into a :
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// routine to take a POSIX style path and turn it into a pre OS X
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// pathname. This routine uses CFURL's. This function is necessary
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// because even though fopen exists in StdCLib
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// it must take a path in the OS native format.
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#ifdef macintosh
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void macify_posix_path(char *posix_path, char *mac_path)
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{
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CFURLRef url;
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url = CFURLCreateWithBytes (kCFAllocatorDefault, (ubyte *) posix_path, strlen(posix_path), GetApplicationTextEncoding(), NULL);
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CFURLGetFileSystemRepresentation (url, 0, (ubyte *) mac_path, 255);
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CFRelease(url);
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}
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#endif
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void cfile_use_alternate_hogdir( char * path )
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{
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if ( path ) {
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strcpy( AltHogDir, path );
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AltHogdir_initialized = 1;
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} else {
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AltHogdir_initialized = 0;
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}
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}
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//in case no one installs one
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int default_error_counter=0;
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//ptr to counter of how many critical errors
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int *critical_error_counter_ptr=&default_error_counter;
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//tell cfile about your critical error counter
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void cfile_set_critical_error_counter_ptr(int *ptr)
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{
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critical_error_counter_ptr = ptr;
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}
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FILE * cfile_get_filehandle( char * filename, char * mode )
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{
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FILE * fp;
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char temp[128];
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#ifdef macintosh
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char mac_path[256];
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#endif
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*critical_error_counter_ptr = 0;
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#ifdef macintosh
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macify_posix_path(filename, mac_path);
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fp = fopen( mac_path, mode );
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#else
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fp = fopen( filename, mode );
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#endif
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if ( fp && *critical_error_counter_ptr ) {
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fclose(fp);
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fp = NULL;
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}
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if ( (fp==NULL) && (AltHogdir_initialized) ) {
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strcpy( temp, AltHogDir );
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strcat( temp, "/");
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strcat( temp, filename );
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*critical_error_counter_ptr = 0;
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#ifdef macintosh
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macify_posix_path(temp, mac_path);
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fp = fopen( mac_path, mode );
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#else
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fp = fopen( temp, mode );
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#endif
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if ( fp && *critical_error_counter_ptr ) {
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fclose(fp);
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fp = NULL;
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}
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}
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return fp;
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}
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hog * cfile_init_hogfile (char *fname)
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{
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char id[4];
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FILE * fp;
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int i, len;
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hog *new_hog;
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fp = cfile_get_filehandle (fname, "rb");
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if (fp == NULL)
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return 0;
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// verify that it is really a Descent Hog File
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fread( id, 3, 1, fp );
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if ( strncmp( id, "DHF", 3 ) ) {
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fclose(fp);
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return NULL;
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}
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new_hog = (hog *) d_malloc (sizeof (hog));
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new_hog->num_files = 0;
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strcpy (new_hog->filename, fname);
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// read file name or reach EOF
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while (! feof (fp)) {
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if (new_hog->num_files >= MAX_FILES_IN_HOG) {
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fclose (fp);
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d_free (new_hog);
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Error ("Exceeded max. number of files in hog (%d).\n",
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MAX_FILES_IN_HOG);
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}
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i = fread (new_hog->files[new_hog->num_files].name, 13, 1, fp);
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if (i != 1)
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break; // we assume it is EOF, so it is OK
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i = fread( &len, 4, 1, fp );
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if (i != 1)
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break;
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new_hog->files[new_hog->num_files].length = INTEL_INT (len);
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new_hog->files[new_hog->num_files].offset = ftell (fp);
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// skip over embedded file:
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i = fseek (fp, INTEL_INT (len), SEEK_CUR);
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new_hog->num_files++;
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}
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fclose (fp);
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return new_hog;
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}
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// Opens builtin hog given its filename. Returns 1 on success.
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int cfile_init(char *hogname)
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{
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Assert (builtin_hog == NULL);
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builtin_hog = cfile_init_hogfile (hogname);
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atexit (free_builtin_hog);
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return builtin_hog != NULL ? 1 : 0;
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}
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int cfile_size(char *hogname)
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{
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CFILE *fp;
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int size;
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fp = cfopen(hogname, "rb");
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if (fp == NULL)
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return -1;
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size = ffilelength(fp->file);
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cfclose(fp);
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return size;
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}
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FILE * cfile_find_in_hog (char * name, int * length, hog *my_hog) {
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FILE * fp;
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int i;
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for (i = 0; i < my_hog->num_files; i++ )
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if (! stricmp (my_hog->files[i].name, name)) {
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fp = cfile_get_filehandle (my_hog->filename, "rb");
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if (fp == NULL)
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return NULL;
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fseek (fp, my_hog->files[i].offset, SEEK_SET);
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*length = my_hog->files[i].length;
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return fp;
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}
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return NULL;
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}
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/*
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* return handle for file called "name", embedded in one of the hogfiles
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*/
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FILE * cfile_find_embedded_file (char * name, int * length)
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{
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FILE * fp;
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if (alt_hog) {
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fp = cfile_find_in_hog (name, length, alt_hog);
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if (fp)
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return fp;
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}
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if (builtin_hog) {
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fp = cfile_find_in_hog (name, length, builtin_hog);
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if (fp)
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return fp;
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}
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if (d1_hog) {
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fp = cfile_find_in_hog (name, length, d1_hog);
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if (fp)
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return fp;
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}
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return NULL;
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}
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int cfile_use_alternate_hogfile (char * name)
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{
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if (alt_hog) {
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d_free (alt_hog);
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alt_hog = NULL;
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}
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if (name) {
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alt_hog = cfile_init_hogfile (name);
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atexit (free_alt_hog);
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if (alt_hog)
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return 1; // success
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}
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return 0;
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}
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/* we use the d1 hog for d1 textures... */
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int cfile_use_descent1_hogfile( char * name )
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{
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if (d1_hog) {
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d_free (d1_hog);
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d1_hog = NULL;
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}
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if (name) {
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d1_hog = cfile_init_hogfile (name);
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atexit (free_d1_hog);
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if (d1_hog)
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return 1; // success
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}
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return 0;
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}
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// cfeof() Tests for end-of-file on a stream
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//
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// returns a nonzero value after the first read operation that attempts to read
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// past the end of the file. It returns 0 if the current position is not end of file.
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// There is no error return.
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int cfeof(CFILE *cfile)
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{
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Assert(cfile != NULL);
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Assert(cfile->file != NULL);
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return (cfile->raw_position >= cfile->size);
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}
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int cferror(CFILE *cfile)
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{
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return ferror(cfile->file);
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}
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int cfexist( char * filename )
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{
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int length;
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FILE *fp;
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if (filename[0] != '\x01')
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fp = cfile_get_filehandle( filename, "rb" ); // Check for non-hog file first...
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else {
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fp = NULL; //don't look in dir, only in hogfile
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filename++;
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}
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if ( fp ) {
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fclose(fp);
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return 1;
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}
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fp = cfile_find_embedded_file (filename, &length);
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if ( fp ) {
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fclose(fp);
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return 2; // file found in hog
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}
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return 0; // Couldn't find it.
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}
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// Deletes a file.
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int cfile_delete(char *filename)
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{
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#ifndef _WIN32_WCE
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return remove(filename);
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#else
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return !DeleteFile(filename);
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#endif
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}
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// Rename a file.
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int cfile_rename(char *oldname, char *newname)
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{
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#ifndef _WIN32_WCE
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return rename(oldname, newname);
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#else
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return !MoveFile(oldname, newname);
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#endif
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}
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// Make a directory.
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int cfile_mkdir(char *pathname)
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{
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#ifdef _WIN32
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# ifdef _WIN32_WCE
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return !CreateDirectory(pathname, NULL);
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# else
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return _mkdir(pathname);
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# endif
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#elif defined(macintosh)
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char mac_path[256];
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Str255 pascal_path;
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long dirID; // Insists on returning this
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macify_posix_path(pathname, mac_path);
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CopyCStringToPascal(mac_path, pascal_path);
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return DirCreate(0, 0, pascal_path, &dirID);
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#else
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return mkdir(pathname, 0755);
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#endif
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}
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CFILE * cfopen(char * filename, char * mode )
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{
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int length;
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FILE * fp;
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CFILE *cfile;
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if (filename[0] != '\x01')
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fp = cfile_get_filehandle( filename, mode ); // Check for non-hog file first...
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else {
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fp = NULL; //don't look in dir, only in hogfile
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filename++;
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}
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if ( !fp ) {
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fp = cfile_find_embedded_file (filename, &length);
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if ( !fp )
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return NULL; // No file found
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if (stricmp(mode, "rb"))
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Error("mode must be rb for files in hog.\n");
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cfile = d_malloc ( sizeof(CFILE) );
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if ( cfile == NULL ) {
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fclose(fp);
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return NULL;
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}
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cfile->file = fp;
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cfile->size = length;
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cfile->offset = ftell( fp );
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cfile->raw_position = 0;
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return cfile;
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} else {
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cfile = d_malloc ( sizeof(CFILE) );
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if ( cfile == NULL ) {
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fclose(fp);
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return NULL;
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}
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cfile->file = fp;
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cfile->size = ffilelength(fp);
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cfile->offset = 0;
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cfile->raw_position = 0;
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return cfile;
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}
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}
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int cfilelength( CFILE *fp )
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{
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return fp->size;
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}
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// cfwrite() writes to the file
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//
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// returns: number of full elements actually written
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//
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//
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int cfwrite(void *buf, int elsize, int nelem, CFILE *cfile)
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{
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int items_written;
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Assert(cfile != NULL);
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Assert(buf != NULL);
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Assert(elsize > 0);
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Assert(cfile->file != NULL);
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Assert(cfile->offset == 0);
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items_written = fwrite(buf, elsize, nelem, cfile->file);
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cfile->raw_position = ftell(cfile->file);
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return items_written;
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}
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// cfputc() writes a character to a file
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//
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// returns: success ==> returns character written
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// error ==> EOF
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//
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int cfputc(int c, CFILE *cfile)
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{
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int char_written;
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Assert(cfile != NULL);
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Assert(cfile->file != NULL);
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Assert(cfile->offset == 0);
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char_written = fputc(c, cfile->file);
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cfile->raw_position = ftell(cfile->file);
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return char_written;
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}
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int cfgetc( CFILE * fp )
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{
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int c;
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if (fp->raw_position >= fp->size ) return EOF;
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c = getc( fp->file );
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if (c!=EOF)
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fp->raw_position = ftell(fp->file)-fp->offset;
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return c;
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}
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// cfputs() writes a string to a file
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//
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// returns: success ==> non-negative value
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// error ==> EOF
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//
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int cfputs(char *str, CFILE *cfile)
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{
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int ret;
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Assert(cfile != NULL);
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Assert(str != NULL);
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Assert(cfile->file != NULL);
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ret = fputs(str, cfile->file);
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cfile->raw_position = ftell(cfile->file);
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return ret;
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}
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char * cfgets( char * buf, size_t n, CFILE * fp )
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{
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int i;
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int c;
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#if 0 // don't use the standard fgets, because it will only handle the native line-ending style
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if (fp->offset == 0) // This is not an archived file
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{
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t = fgets(buf, n, fp->file);
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fp->raw_position = ftell(fp->file);
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return t;
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}
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#endif
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for (i=0; i<n-1; i++ ) {
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do {
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if (fp->raw_position >= fp->size ) {
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*buf = 0;
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return NULL;
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}
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c = cfgetc(fp);
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if (c == 0 || c == 10) // Unix line ending
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break;
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if (c == 13) { // Mac or DOS line ending
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int c1;
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c1 = cfgetc(fp);
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if (c1 != EOF) // The file could end with a Mac line ending
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cfseek(fp, -1, SEEK_CUR);
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if ( c1 == 10 ) // DOS line ending
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continue;
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else // Mac line ending
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break;
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}
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} while ( c == 13 );
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if ( c == 13 ) // because cr-lf is a bad thing on the mac
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c = '\n'; // and anyway -- 0xod is CR on mac, not 0x0a
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if ( c=='\n' ) break;
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*buf++ = c;
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}
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*buf++ = 0;
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return buf;
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}
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size_t cfread( void * buf, size_t elsize, size_t nelem, CFILE * fp )
|
|
{
|
|
unsigned int i, size;
|
|
|
|
size = elsize * nelem;
|
|
if ( size < 1 ) return 0;
|
|
|
|
i = fread ( buf, 1, size, fp->file );
|
|
fp->raw_position += i;
|
|
return i/elsize;
|
|
}
|
|
|
|
|
|
int cftell( CFILE *fp )
|
|
{
|
|
return fp->raw_position;
|
|
}
|
|
|
|
int cfseek( CFILE *fp, long int offset, int where )
|
|
{
|
|
int c, goal_position;
|
|
|
|
switch( where ) {
|
|
case SEEK_SET:
|
|
goal_position = offset;
|
|
break;
|
|
case SEEK_CUR:
|
|
goal_position = fp->raw_position+offset;
|
|
break;
|
|
case SEEK_END:
|
|
goal_position = fp->size+offset;
|
|
break;
|
|
default:
|
|
return 1;
|
|
}
|
|
c = fseek( fp->file, fp->offset + goal_position, SEEK_SET );
|
|
fp->raw_position = ftell(fp->file)-fp->offset;
|
|
return c;
|
|
}
|
|
|
|
int cfclose(CFILE *fp)
|
|
{
|
|
int result;
|
|
|
|
result = fclose(fp->file);
|
|
d_free(fp);
|
|
|
|
return result;
|
|
}
|
|
|
|
// routines to read basic data types from CFILE's. Put here to
|
|
// simplify mac/pc reading from cfiles.
|
|
|
|
int cfile_read_int(CFILE *file)
|
|
{
|
|
int32_t i;
|
|
|
|
if (cfread( &i, sizeof(i), 1, file) != 1)
|
|
Error( "Error reading int in cfile_read_int()" );
|
|
|
|
i = INTEL_INT(i);
|
|
return i;
|
|
}
|
|
|
|
short cfile_read_short(CFILE *file)
|
|
{
|
|
int16_t s;
|
|
|
|
if (cfread( &s, sizeof(s), 1, file) != 1)
|
|
Error( "Error reading short in cfile_read_short()" );
|
|
|
|
s = INTEL_SHORT(s);
|
|
return s;
|
|
}
|
|
|
|
sbyte cfile_read_byte(CFILE *file)
|
|
{
|
|
sbyte b;
|
|
|
|
if (cfread( &b, sizeof(b), 1, file) != 1)
|
|
Error( "Error reading byte in cfile_read_byte()" );
|
|
|
|
return b;
|
|
}
|
|
|
|
fix cfile_read_fix(CFILE *file)
|
|
{
|
|
fix f;
|
|
|
|
if (cfread( &f, sizeof(f), 1, file) != 1)
|
|
Error( "Error reading fix in cfile_read_fix()" );
|
|
|
|
f = (fix)INTEL_INT((int)f);
|
|
return f;
|
|
}
|
|
|
|
fixang cfile_read_fixang(CFILE *file)
|
|
{
|
|
fixang f;
|
|
|
|
if (cfread(&f, 2, 1, file) != 1)
|
|
Error("Error reading fixang in cfile_read_fixang()");
|
|
|
|
f = (fixang) INTEL_SHORT((int) f);
|
|
return f;
|
|
}
|
|
|
|
void cfile_read_vector(vms_vector *v, CFILE *file)
|
|
{
|
|
v->x = cfile_read_fix(file);
|
|
v->y = cfile_read_fix(file);
|
|
v->z = cfile_read_fix(file);
|
|
}
|
|
|
|
void cfile_read_angvec(vms_angvec *v, CFILE *file)
|
|
{
|
|
v->p = cfile_read_fixang(file);
|
|
v->b = cfile_read_fixang(file);
|
|
v->h = cfile_read_fixang(file);
|
|
}
|
|
|
|
void cfile_read_matrix(vms_matrix *m,CFILE *file)
|
|
{
|
|
cfile_read_vector(&m->rvec,file);
|
|
cfile_read_vector(&m->uvec,file);
|
|
cfile_read_vector(&m->fvec,file);
|
|
}
|
|
|
|
|
|
void cfile_read_string(char *buf, int n, CFILE *file)
|
|
{
|
|
char c;
|
|
|
|
do {
|
|
c = (char)cfile_read_byte(file);
|
|
if (n > 0)
|
|
{
|
|
*buf++ = c;
|
|
n--;
|
|
}
|
|
} while (c != 0);
|
|
}
|
|
|
|
|
|
// equivalent write functions of above read functions follow
|
|
|
|
int cfile_write_int(int i, CFILE *file)
|
|
{
|
|
i = INTEL_INT(i);
|
|
return cfwrite(&i, sizeof(i), 1, file);
|
|
}
|
|
|
|
|
|
int cfile_write_short(short s, CFILE *file)
|
|
{
|
|
s = INTEL_SHORT(s);
|
|
return cfwrite(&s, sizeof(s), 1, file);
|
|
}
|
|
|
|
|
|
int cfile_write_byte(sbyte b, CFILE *file)
|
|
{
|
|
return cfwrite(&b, sizeof(b), 1, file);
|
|
}
|
|
|
|
|
|
int cfile_write_string(char *buf, CFILE *file)
|
|
{
|
|
int len;
|
|
|
|
if ((!buf) || (buf && !buf[0]))
|
|
return cfile_write_byte(0, file);
|
|
|
|
len = strlen(buf);
|
|
if (!cfwrite(buf, len, 1, file))
|
|
return 0;
|
|
|
|
return cfile_write_byte(0, file); // write out NULL termination
|
|
}
|