okular/generators/dvi/util.cpp

   1 // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; c-brace-offset: 0; -*-
   2 /*
   3  * Copyright (c) 1994 Paul Vojta.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * NOTE:
  27  *        xdvi is based on prior work as noted in the modification history, below.
  28  */
  29
  30 /*
  31  * DVI previewer for X.
  32  *
  33  * Eric Cooper, CMU, September 1985.
  34  *
  35  * Code derived from dvi-imagen.c.
  36  *
  37  * Modification history:
  38  * 1/1986        Modified for X.10        --Bob Scheifler, MIT LCS.
  39  * 7/1988        Modified for X.11        --Mark Eichin, MIT
  40  * 12/1988        Added 'R' option, toolkit, magnifying glass
  41  *                                        --Paul Vojta, UC Berkeley.
  42  * 2/1989        Added tpic support       --Jeffrey Lee, U of Toronto
  43  * 4/1989        Modified for System V    --Donald Richardson, Clarkson Univ.
  44  * 3/1990        Added VMS support        --Scott Allendorf, U of Iowa
  45  * 7/1990        Added reflection mode    --Michael Pak, Hebrew U of Jerusalem
  46  * 1/1992        Added greyscale code     --Till Brychcy, Techn. Univ. Muenchen
  47  *                                          and Lee Hetherington, MIT
  48  * 4/1994        Added DPS support, bounding box
  49  *                                        --Ricardo Telichevesky
  50  *                                          and Luis Miguel Silveira, MIT RLE.
  51  */
  52
  53 #include <config.h>
  54
  55 #include "kvs_debug.h"
  56 #include "xdvi.h"
  57
  58 #include <klocale.h>
  59 #include <kmessagebox.h>
  60
  61 #include <cstdlib>
  62
  63
  64 /*
  65  *   General utility routines.
  66  */
  67
  68 /*
  69  *   Print error message and quit.
  70  */
  71
  72 void oops(const QString& message)
  73 {
  74   kError(kvs::dvi) << "Fatal Error:" << message << endl;
  75
  76   KMessageBox::error( NULL,
  77                       i18n("Fatal error.\n\n") +
  78                       message +
  79                       i18n("\n\n\
  80 This probably means that either you found a bug in Okular,\n\
  81 or that the DVI file, or auxiliary files (such as font files, \n\
  82 or virtual font files) were really badly broken.\n\
  83 Okular will abort after this message. If you believe that you \n\
  84 found a bug, or that Okular should behave better in this situation\n\
  85 please report the problem."));
  86   exit(1);
  87 }
  88
  89
  90 /*
  91  * Read size bytes from the FILE fp, constructing them into a
  92  * signed/unsigned integer.
  93  */
  94 unsigned long num(FILE *fp, int size)
  95 {
  96   register long x = 0;
  97
  98   while (size--) x = (x << 8) | one(fp);
  99   return x;
 100 }
 101
 102 long snum(FILE *fp, int size)
 103 {
 104   register long x;
 105
 106 #ifdef __STDC__
 107   x = (signed char) getc(fp);
 108 #else
 109   x = (unsigned char) getc(fp);
 110   if (x & 0x80) x -= 0x100;
 111 #endif
 112   while (--size) x = (x << 8) | one(fp);
 113   return x;
 114 }