rleaddeof.c

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/* 
 * rleaddeof.c - Add an EOF opcode to RLE files without one.
 * 
 * Author:  Spencer W. Thomas
 *      Computer Science Dept.
 *      University of Michigan
 * Date:    February, 1990
 * Copyright (c) 1990, The Regents of the University of Michigan
 */

#include <stdio.h>
#include "rle.h"
#include "rle_raw.h"

/*****************************************************************
 * TAG( main )
 * 
 * Usage:
 *     rleaddeof [-o outfile] [infile]
 * Inputs:
 *  infile:     If specified, input will be read from here,
 *          otherwise, input will be read from stdin.
 * Outputs:
 *  -o outfile: Writes the output image to this file with an
 *          EOF opcode appended. Default is stdout.
 * Assumptions:
 *  [None]
 * Algorithm:
 *  [None]
 */
void
main( argc, argv )
int argc;
char **argv;
{
    char * infname = NULL, *outfname = NULL;
    int oflag = 0;
    FILE *outfile = stdout;
    rle_hdr     in_hdr, out_hdr;
    int rle_cnt, rle_err;

    in_hdr = *rle_hdr_init( NULL );
    out_hdr = *rle_hdr_init( NULL );

    if ( scanargs( argc, argv, "% o%-outfile!s infile%s",
           &oflag, &outfname, &infname ) == 0 )
    exit( 1 );

    /* Open input file */
    in_hdr.rle_file = rle_open_f( cmd_name( argv ), infname, "r" );
    rle_names( &in_hdr, cmd_name( argv ), infname, 0 );
    rle_names( &out_hdr, out_hdr.cmd, outfname, 0 );
    for ( rle_cnt = 0;
      (rle_err = rle_get_setup( &in_hdr )) == RLE_SUCCESS;
      rle_cnt++ )
    {
    /* Open output after first successful read. */
    if ( rle_cnt == 0 )
        outfile = rle_open_f( "rleaddeof", outfname, "w" );

    /* Copy input to output file */
    (void)rle_hdr_cp( &in_hdr, &out_hdr );
    out_hdr.rle_file = outfile;
    rle_put_setup( &out_hdr );

    rle_cp( &in_hdr, &out_hdr );
    }

    /* Check for an error.  EOF or EMPTY is ok if at least one image
     * has been read.  Otherwise, print an error message.
     */
    if ( rle_cnt == 0 || (rle_err != RLE_EOF && rle_err != RLE_EMPTY) )
    rle_get_error( rle_err, cmd_name( argv ), infname );


    exit( 0 );
}