problems with latest merge

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From: Godmar Back (gback@cs.utah.edu)
Date: Thu Feb 11 1999 - 16:56:00 EST


The latest snap doesn't compile because of a problem in imggif.c
that may be caused by an old version of gif_lib.h on my system (?)
Specifically, GifFileType does not have a UserData element.

In imggif.c, it says:

    typedef struct {
      unsigned char *buf;
      unsigned char *p;
      long remain;
    } BufferSource;

    int
    readGifBuffer ( GifFileType *gf, GifByteType* buf, int length )
    {
      BufferSource *psource = (BufferSource*)gf->UserData;
      
      if ( psource && (psource->remain >= length) ) {
            memcpy( buf, psource->p, length);
            psource->p += length;
            psource->remain -= length;

            return length;
      }
      else {
            return 0;
      }
    }

However, my gif_lib.h file:

/******************************************************************************
* In order to make life a little bit easier when using the GIF file format, *
* this library was written, and which does all the dirty work... *
* *
* Written by Gershon Elber, Jun. 1989 *
* Hacks by Eric S. Raymond, Sep. 1992 *
*******************************************************************************
* History: *
* 14 Jun 89 - Version 1.0 by Gershon Elber. *
* 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). *
* 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp) *
* 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support)
******************************************************************************/

says:

typedef struct GifFileType {
    int SWidth, SHeight, /* Screen dimensions. */
        SColorResolution, /* How many colors can we generate? */
        SBackGroundColor; /* I hope you understand this one... */
    ColorMapObject *SColorMap; /* NULL if not exists. */
    int ImageCount; /* Number of current image */
    GifImageDesc Image; /* Block describing current image */
    struct SavedImage *SavedImages; /* Use this to accumulate file state */
    VoidPtr Private; /* Don't mess with this! */
} GifFileType;

and hence

/n/marker/x/gback/transvirtual/kaffe/libraries/clib/awt/X/imggif.c: In function `readGifBuffer':
/n/marker/x/gback/transvirtual/kaffe/libraries/clib/awt/X/imggif.c:170: structure has no member named `UserData'

Do I have an outdated version? What version do I need? Should we check in
configure.in for that version?

        - Godmar


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