/* raw2pgm.c	Turn raw image file to pgm image file */

#include <stdio.h>
#include <stdlib.h>
#include "image.h"

int main(int argc, char *argv[])
{
  int RowSize, ColSize;

  FILE *PgmFile;
  FILE *RawFile;

  char header[80];
  
  /* parse command line */
  if (argc!=5) {
    fprintf(stderr, "Invalid number of command line arguments!");
    fprintf(stderr, "\nUsage: raw2pgm raw_file pgm_file x_size y_size\n");
    exit(1);
  }
  else {
    if ( !(PgmFile=fopen(argv[2], "w")) || !(RawFile=fopen(argv[1], "rb")) ) {
      fprintf(stderr, "Can't open one of the files!\n");
      exit(1);
    }
    if ( (RowSize=atoi(argv[3]))<0 || (ColSize=atoi(argv[4]))<0 ) {
      fprintf(stderr, "Invalid image dimensions!\n");
      exit(1);
    }
  }

  /* write the header information */
  write_header(PgmFile, RowSize, ColSize);
  while (!feof(RawFile))
    fputc(fgetc(RawFile), PgmFile);
  fclose(RawFile);
  fclose(PgmFile);

  /* mission accomplished */
  return (0);
}