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From: jvb7u@Virginia.EDU (Jon Brinkmann)
Newsgroups: alt.graphics.pixutils,comp.graphics
Subject: XV patches for GIF89a images
Summary: Patches for xv
Keywords: XV GIF89a patches
Message-ID: <1991Jun27.032742.24228@murdoch.acc.Virginia.EDU>
Date: 27 Jun 91 03:27:42 GMT
Sender: usenet@murdoch.acc.Virginia.EDU
Followup-To: jvb7u@Virginia.EDU (Jon Brinkmann)
Organization: Department of Astronomy, University of Virginia
Lines: 35

In order to get xv, revision 11/29/90, patchlevel 3 to accept GIF89a files,
I made the following patches:

xv.c:

780c780,781
<   if (strncmp(magicno,"GIF87",5)==0) filetype = GIF;
---
>   if (strncmp(magicno,"GIF87a",6)==0 ||
> 	   strncmp(magicno,"GIF89a",6)==0) filetype = GIF;

xvgif.c:

91c91,92
< char *id = "GIF87a";
---
> char *id87 = "GIF87a";
> char *id89 = "GIF89a";
143c144
<   if (strncmp(ptr, id, 6)) 
---
>   if (strncmp(ptr, id87, 6) && strncmp(ptr, id89, 6)) 

Please note that xv won't process any of the GIF89a extensions (such as
aspect ratio).

If you need the source for this patchlevel of xv, check the contrib
directory of export.lcs.mit.edu.

Jon
--
Jon Brinkmann					Astronomy Department
Internet:	jvb7u@Virginia.EDU		University of Virginia
UUCP:		...!uunet!virginia!jvb7u	P.O. Box 3818
SPAN/HEPnet:	6654::jvb7u			Charlottesville, VA 22903-0818