/*
 * Copyright (c) 2011-2012, Centre National d'Etudes Spatiales (CNES), France 
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * compare_dump_files.c
 *
 *  Created on: 25 juil. 2011
 *      Author: mickael
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>

#include "opj_getopt.h"

typedef struct test_cmp_parameters
{
  /**  */
  char* base_filename;
  /**  */
  char* test_filename;
} test_cmp_parameters;

/*******************************************************************************
 * Command line help function
 *******************************************************************************/
static void compare_dump_files_help_display(void) {
  fprintf(stdout,"\nList of parameters for the compare_dump_files function  \n");
  fprintf(stdout,"\n");
  fprintf(stdout,"  -b \t REQUIRED \t filename to the reference/baseline dump file \n");
  fprintf(stdout,"  -t \t REQUIRED \t filename to the test dump file image\n");
  fprintf(stdout,"\n");
}
/*******************************************************************************
 * Parse command line
 *******************************************************************************/
static int parse_cmdline_cmp(int argc, char **argv, test_cmp_parameters* param)
{
  size_t sizemembasefile, sizememtestfile;
  int index;
  const char optlist[] = "b:t:";
  int c;

  /* Init parameters */
  param->base_filename = NULL;
  param->test_filename = NULL;

  opj_opterr = 0;

  while ((c = opj_getopt(argc, argv, optlist)) != -1)
    switch (c)
      {
    case 'b':
      sizemembasefile = strlen(opj_optarg) + 1;
      param->base_filename = (char*) malloc(sizemembasefile);
      strcpy(param->base_filename, opj_optarg);
      /*printf("param->base_filename = %s [%d / %d]\n", param->base_filename, strlen(param->base_filename), sizemembasefile );*/
      break;
    case 't':
      sizememtestfile = strlen(opj_optarg) + 1;
      param->test_filename = (char*) malloc(sizememtestfile);
      strcpy(param->test_filename, opj_optarg);
      /*printf("param->test_filename = %s [%d / %d]\n", param->test_filename, strlen(param->test_filename), sizememtestfile);*/
      break;
    case '?':
      if ( (opj_optopt == 'b') || (opj_optopt == 't') )
        fprintf(stderr, "Option -%c requires an argument.\n", opj_optopt);
      else
        if (isprint(opj_optopt)) fprintf(stderr, "Unknown option `-%c'.\n", opj_optopt);
        else fprintf(stderr, "Unknown option character `\\x%x'.\n", opj_optopt);
      return 1;
    default:
      fprintf(stderr, "WARNING -> this option is not valid \"-%c %s\"\n", c, opj_optarg);
      break;
      }

  if (opj_optind != argc)
    {
    for (index = opj_optind; index < argc; index++)
      fprintf(stderr,"Non-option argument %s\n", argv[index]);
    return 1;
    }

  return 0;
}

/*******************************************************************************
 * MAIN
 *******************************************************************************/
int main(int argc, char **argv)
{
  test_cmp_parameters inParam;
  FILE *fbase=NULL, *ftest=NULL;
  int same = 0;
  char lbase[512];
  char strbase[512];
  char ltest[512];
  char strtest[512];

  if( parse_cmdline_cmp(argc, argv, &inParam) == 1 )
    {
    compare_dump_files_help_display();
    goto cleanup;
    }

  /* Display Parameters*/
  printf("******Parameters********* \n");
  printf(" base_filename = %s\n"
    " test_filename = %s\n",
    inParam.base_filename, inParam.test_filename);
  printf("************************* \n");

  /* open base file */
  printf("Try to open: %s for reading ... ", inParam.base_filename);
  if((fbase = fopen(inParam.base_filename, "rb"))==NULL)
    {
    goto cleanup;
    }
  printf("Ok.\n");

  /* open test file */
  printf("Try to open: %s for reading ... ", inParam.test_filename);
  if((ftest = fopen(inParam.test_filename, "rb"))==NULL)
    {
    goto cleanup;
    }
  printf("Ok.\n");

  while (fgets(lbase, sizeof(lbase), fbase) && fgets(ltest,sizeof(ltest),ftest))
    {
    int nbase = sscanf(lbase, "%511[^\r\n]", strbase);
    int ntest = sscanf(ltest, "%511[^\r\n]", strtest);
    assert( nbase != 511 && ntest != 511 );
    if( nbase != 1 || ntest != 1 )
      {
      fprintf(stderr, "could not parse line from files\n" );
      goto cleanup;
      }
    if( strcmp( strbase, strtest ) != 0 )
      {
      fprintf(stderr,"<%s> vs. <%s>\n", strbase, strtest);
      goto cleanup;
      }
    }

  same = 1;
  printf("\n***** TEST SUCCEED: Files are the same. *****\n");
cleanup:
  /*Close File*/
  if(fbase) fclose(fbase);
  if(ftest) fclose(ftest);

  /* Free memory*/
  free(inParam.base_filename);
  free(inParam.test_filename);

  return same ? EXIT_SUCCESS : EXIT_FAILURE;
}