/******************************************************************************   "Gif-Lib" - Yet another gif library.				     **									     ** Written by:  Gershon Elber			IBM PC Ver 0.1,	Jun. 1989    ******************************************************************************** Handle error reporting for the GIF library.				     ******************************************************************************** History:								     ** 17 Jun 89 - Version 1.0 by Gershon Elber.				     ******************************************************************************/#include <stdio.h>#include "gif_lib.h"#define PROGRAM_NAME	"GIF_LIBRARY"int _GifError = 0;#ifdef SYSVstatic char *VersionStr =        "Gif library module,\t\tEric S. Raymond\n\	(C) Copyright 1997 Eric S. Raymond\n";#elsestatic char *VersionStr =	PROGRAM_NAME	"	IBMPC "	GIF_LIB_VERSION	"	Eric S. Raymond,	"	__DATE__ ",   " __TIME__ "\n"	"(C) Copyright 1997 Eric S. Raymond\n";#endif /* SYSV *//* this is just here to prevent unused variable warnings. */static char *cvsid_aw() { return( cvsid_aw() ? ((char *) NULL) : VersionStr ); }/****************************************************************************** Return the last GIF error (0 if none) and reset the error.		     ******************************************************************************/int GifLastError(void){    int i = _GifError;    _GifError = 0;    return i;}/****************************************************************************** Print the last GIF error to stderr.					     ******************************************************************************/void PrintGifError(void){    char *Err;    switch(_GifError) {	case E_GIF_ERR_OPEN_FAILED:	    Err = "Failed to open given file";	    break;	case E_GIF_ERR_WRITE_FAILED:	    Err = "Failed to Write to given file";	    break;	case E_GIF_ERR_HAS_SCRN_DSCR:	    Err = "Screen Descriptor already been set";	    break;	case E_GIF_ERR_HAS_IMAG_DSCR:	    Err = "Image Descriptor is still active";	    break;	case E_GIF_ERR_NO_COLOR_MAP:	    Err = "Neither Global Nor Local color map";	    break;	case E_GIF_ERR_DATA_TOO_BIG:	    Err = "#Pixels bigger than Width * Height";	    break;	case E_GIF_ERR_NOT_ENOUGH_MEM:	    Err = "Fail to allocate required memory";	    break;	case E_GIF_ERR_DISK_IS_FULL:	    Err = "Write failed (disk full?)";	    break;	case E_GIF_ERR_CLOSE_FAILED:	    Err = "Failed to close given file";	    break;	case E_GIF_ERR_NOT_WRITEABLE:	    Err = "Given file was not opened for write";	    break;	case D_GIF_ERR_OPEN_FAILED:	    Err = "Failed to open given file";	    break;	case D_GIF_ERR_READ_FAILED:	    Err = "Failed to Read from given file";	    break;	case D_GIF_ERR_NOT_GIF_FILE:	    Err = "Given file is NOT GIF file";	    break;	case D_GIF_ERR_NO_SCRN_DSCR:	    Err = "No Screen Descriptor detected";	    break;	case D_GIF_ERR_NO_IMAG_DSCR:	    Err = "No Image Descriptor detected";	    break;	case D_GIF_ERR_NO_COLOR_MAP:	    Err = "Neither Global Nor Local color map";	    break;	case D_GIF_ERR_WRONG_RECORD:	    Err = "Wrong record type detected";	    break;	case D_GIF_ERR_DATA_TOO_BIG:	    Err = "#Pixels bigger than Width * Height";	    break;	case D_GIF_ERR_NOT_ENOUGH_MEM:	    Err = "Fail to allocate required memory";	    break;	case D_GIF_ERR_CLOSE_FAILED:	    Err = "Failed to close given file";	    break;	case D_GIF_ERR_NOT_READABLE:	    Err = "Given file was not opened for read";	    break;	case D_GIF_ERR_IMAGE_DEFECT:	    Err = "Image is defective, decoding aborted";	    break;	case D_GIF_ERR_EOF_TOO_SOON:	    Err = "Image EOF detected, before image complete";	    break;	default:	    Err = NULL;	    break;    }    if (Err != NULL)	fprintf(stderr, "\nGIF-LIB error: %s.\n", Err);    else	fprintf(stderr, "\nGIF-LIB undefined error %d.\n", _GifError);}