This patch to giftool 1.0 (the README says "version 0.9 (a beta release)")
does the following:

    - fixes a very nasty bug in the GIF-writing code that caused it
      to crash on images of certain sizes (e.g., 256 x 192), thereby
      destroying such images if the -B option was in effect

    - removes duplicated text from the license-info screen

    - documents a missing option on the usage screen

    - fixes some minor typos in writeGIF.c

The original program is at http://www.homepages.com/tools/giftool/ .

Greg Roelofs
newt@uchicago.edu
960602


*** readGIF.c.old	Fri Dec  9 11:17:03 1994
--- readGIF.c	Fri Apr  5 07:07:50 1996
***************
*** 253,259 ****
  				cur->data.image.cmapSize = 0;
  
  			}
! 			cur->data.image.data = (unsigned char *)malloc(cur->width * cur->height);
  			cur->data.image.interlaced = BitSet(buf[8], INTERLACE);
  			readImage(fd, BitSet(buf[8], INTERLACE), 
  				cur->width, cur->height, cur->data.image.data);
--- 253,260 ----
  				cur->data.image.cmapSize = 0;
  
  			}
! 			/* GRR 960405:  putImage() sometimes reads one byte too many: add one here */
! 			cur->data.image.data = (unsigned char *)malloc(cur->width * cur->height + 1);
  			cur->data.image.interlaced = BitSet(buf[8], INTERLACE);
  			readImage(fd, BitSet(buf[8], INTERLACE), 
  				cur->width, cur->height, cur->data.image.data);
*** main.c.old	Wed Dec  7 10:31:59 1994
--- main.c	Sat May  6 09:49:26 1995
***************
*** 1207,1224 ****
  	printf("is made obvious to the user that GIFTOOL is shareware, and that they should\n");
  	printf("consider donating, or at least reading this License Info.\n");
  	printf("\n");
- 	printf("Permission to use, copy, and distribute GIFTOOL in its entirety, for\n");
- 	printf("non-commercial purposes, is hereby granted without fee, provided that\n");
- 	printf("this license information and copyright notice appear in all copies.\n");
- 	printf("\n");
- 	printf("Note that distributing GIFTOOL 'bundled' in with ANY product is considered\n");
- 	printf("to be a 'commercial purpose'.\n");
- 	printf("\n");
- 	printf("Also note that any copies of GIFTOOL that are distributed MUST be built\n");
- 	printf("and/or configured to be in their 'unregistered copy' mode, so that it\n");
- 	printf("is made obvious to the user that GIFTOOL is shareware, and that they should\n");
- 	printf("consider donating, or at least reading this License Info.\n");
- 	printf("\n");
  	printf("The software may be modified for your own purposes, but modified\n");
  	printf("versions may NOT be distributed without prior consent of the author.\n");
  	printf("\n");
--- 1207,1212 ----
***************
*** 1257,1262 ****
--- 1245,1251 ----
  	fprintf(stderr,"Usage: giftool [options] [file]\n");
  	fprintf(stderr,"       giftool (-p|-c|-B) [options] [files...]\n");
  	fprintf(stderr,"\t-B\tBatch Mode, read and write the same filename\n");
+ 	fprintf(stderr,"\t-O\tOptimize the palette (histogram order)\n");
  	fprintf(stderr,"\t-i\tSet GIF Interlace mode ON\n");
  	fprintf(stderr,"\t+i\tSet GIF Interlace mode OFF\n");
  	fprintf(stderr,"\t-p\tPrint information about file(s)\n");
***************
*** 1270,1276 ****
  	fprintf(stderr,"\n");
  	fprintf(stderr,"For instance you could say 'giftool -B -i *.gif' to convert all your images\nto interlaced GIF files in one easy step.\n");
  	fprintf(stderr,"\n");
! 	fprintf(stderr,"giftool version 1.0 is Copyright 1994 Home Pages, Inc and is shareware.\n");
  	fprintf(stderr,"Please, use the -info option to read the licensing information.\n");
  	exit(1);
  }
--- 1259,1265 ----
  	fprintf(stderr,"\n");
  	fprintf(stderr,"For instance you could say 'giftool -B -i *.gif' to convert all your images\nto interlaced GIF files in one easy step.\n");
  	fprintf(stderr,"\n");
! 	fprintf(stderr,"giftool version 1.0-grr is Copyright 1994 Home Pages, Inc and is shareware.\n");
  	fprintf(stderr,"Please, use the -info option to read the licensing information.\n");
  	exit(1);
  }
*** writeGIF.c.old	Wed Nov 30 18:09:57 1994
--- writeGIF.c	Fri Apr  5 07:17:17 1996
***************
*** 30,37 ****
  
  /* ppmtogif.c - read a portable pixmap and produce a GIF file
  **
! ** Based on GIFENCOD by David Rowley <mgardi@watdscu.waterloo.edu>.A
! ** Lempel-Zim compression based on "compress".
  **
  ** Copyright (C) 1989 by Jef Poskanzer.
  **
--- 30,37 ----
  
  /* ppmtogif.c - read a portable pixmap and produce a GIF file
  **
! ** Based on GIFENCOD by David Rowley <mgardi@watdscu.waterloo.edu>.
! ** Lempel-Ziv compression based on "compress".
  **
  ** Copyright (C) 1989 by Jef Poskanzer.
  **