[GRASS5] Re: [NVIZ] Code for PPM dumps

[Markus Neteler]

Hi all,

now the endian problem is fixed.

On Wed, Sep 27, 2000 at 04:16:44PM +0100, Markus Neteler wrote:
> On Tue, Sep 26, 2000 at 12:56:48PM +0200, Andreas Lange wrote:
> > Markus,
> > 
> > the big endian/little endian part of the code will give problems, as not
> > only sun machines are big-endian. There are more general solutions, have
> > a look at tifflib. There must be other code within grass where this
> > problem is solved, but i have currently no time to search. I don't know
> > exactly if a config-solution or a solution within the code is better,

I have searched the code and found a test in
./src.contrib/GMSL/NVIZ2.2/TOGL/apps/image.c

    union {
        int testWord;
        char testByte[4];
    } endianTest;
    int swapFlag;

    endianTest.testWord = 1;
    if (endianTest.testByte[0] == 1) {
        swapFlag = 1;                 
    } else {               
        swapFlag = 0;       
    }                       

    if (swapFlag) {
     dothis; /*true: little endian */
    }                    
    else {
     dothat; /* big endian */
    }

It is implemented now in
src/libes/ogsf/gsd_img_ppm.c

Please report any problems.

Markus

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