hdf5/tools/gifconv/gif2hdf.c

/*
 * Copyright (C) 2001 National Center for Supercomputing Applications
 *                    All rights reserved.
 */
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include "gif.h"

int
main(int argv , char *argc[])
{
    GIFTOMEM GifMemoryStruct;
    GIFIMAGEDESC gifImageDesc;

    FILE *fpGif;

    /* replacing int32 with long */
    long i, ImageCount;
    long filesize;

    BYTE *MemGif;
    BYTE *StartPos;

    /* VSNAMELENMAX is a carryover from HDF4 and is #defined to 256 in gif.h */
    char GIFFileName[VSNAMELENMAX];
    char HDFFileName[VSNAMELENMAX];

    /*
     * Initialize all GifMemoryStruct pointers to null to prevent hassles
     * later on
     */
    GifMemoryStruct.GifHeader                  = NULL;
    GifMemoryStruct.GifImageDesc               = NULL;
    GifMemoryStruct.GifGraphicControlExtension = NULL;
    GifMemoryStruct.GifPlainTextExtension      = NULL;
    GifMemoryStruct.GifApplicationExtension    = NULL;
    GifMemoryStruct.GifCommentExtension        = NULL;

    if (argv < 3) {
        printf("\n\nWrong Usage. Use:\ngif2hdf <GIFFILE> <HDFFILE>\n\n");
        return(-1);
    }

    strncpy(GIFFileName , argc[1] , VSNAMELENMAX - 1);
    strncpy(HDFFileName , argc[2] , VSNAMELENMAX - 1);
    GIFFileName[VSNAMELENMAX - 1] = '\0';
    HDFFileName[VSNAMELENMAX - 1] = '\0';

    if (!(fpGif = fopen(GIFFileName,"rb"))) {
        printf("Unable to open GIF file for reading.\n");
        printf("Filename (including path) must be less than %d charachters in length\n",
               VSNAMELENMAX);
        exit(-1);
    }

    /* Get the whole file into memory. Mem's much faster than I/O */
    fseek(fpGif, 0L , 2);
    filesize = ftell(fpGif);
    fseek(fpGif, 0L , 0);

    if (filesize == 0)
        printf("File Size Zero");

    if (!(MemGif = StartPos = (BYTE *)malloc((size_t)filesize))) {
        printf("Out of memory");
        exit (-1);
    }

    if (fread(MemGif,(size_t)filesize,1,fpGif) != 1) {
        printf("Corrupted Input File");
        exit(-1);
    }

    fseek(fpGif,0L,0);

    /*
     * Call Gif2Mem and break the whole file into parts.  Gif2Mem also calls
     * decompresses the images so we don't have to worry about that
     */
    GifMemoryStruct = Gif2Mem(MemGif);

    if (ferror(fpGif)) {
            printf("File Stream Error\n\n");
            exit(-1);
    }

    fclose(fpGif);

    /*
     * Call WriteHDF from here. Go ahead and change WriteHDF to write whatever
     * format you want
     */
    if (WriteHDF(GifMemoryStruct , argc[2] , argc[1]))
        printf("HDF Write Error\n\n");

    /* Free all buffers */
    /* replacing int32 with long */
    ImageCount = (long)((GifMemoryStruct.GifHeader)->ImageCount);

    for(i = 0; i < ImageCount ; i++) {
        gifImageDesc = *(GifMemoryStruct.GifImageDesc[i]);

        if (gifImageDesc.Image != NULL)
            free(gifImageDesc.Image);

        if (GifMemoryStruct.GifGraphicControlExtension[i] != NULL)
            free(GifMemoryStruct.GifGraphicControlExtension[i]);
    }

    free(StartPos);
    free(GifMemoryStruct.GifHeader);
    free(GifMemoryStruct.GifApplicationExtension);
    return 0;
}