// file: $SPEECH_HOMEWORK4/hw4/util/calculate_lpc/v1.0/clpc_gp_0.cc
//
// a simple command line parser
//
 
// isip include files
//
#include "calculate_lpc.h"
#include "calculate_lpc_constants.h"
#include "signal_noise_ratio_constants.h"

// function: get_parameters_cc
//
// arguments:
//
// return value: a logical_1 indicating status
//
// This function parses command line arguments.
//
//
logical_1 get_parameters_cc(int_4 argc_a, char_1** argv_a,
			    char_1*& param_file_a, char_1*& input_file_a,
			    char_1*& output_file_a, int_4& debug_level_a,
			    int_4& num_chan_a, float_4& window_a,
			    float_4& pre_emphasize_value_a, int_4& lp_order_a,
			    float_4& center_a, int_4& sf_a, int_4& method_a) {

  // main decoding loop
  //
  int_4 last_index = argc_a;
  char_1 tmp_string[ISIP_MAX_STRING_LENGTH];
  
  // if no arguments are given then print out a help message
  //
  if (last_index == (int)1) {
    sprintf((char*)tmp_string,
            (char*)ISIP_HELP_FORMAT, (char*)CLPC_HELP_FILE);
    system((char*)tmp_string);
    
    // exit gracefully
    //
    exit (ISIP_NO_ERROR);
  }

  for (int_4 index=1; index<last_index; index++) {
 
    // check for help
    //
    if (strcmp((char*)ISIP_HELP_OPTION, (char*)argv_a[index]) == (int)0) {
      sprintf((char*)tmp_string,
              (char*)ISIP_HELP_FORMAT, (char*)CLPC_HELP_FILE);
      system((char*)tmp_string);
      
      // exit gracefully
      //
      exit(ISIP_NO_ERROR);
    }
    
    // pick off param option
    //
    else if (strcmp((char*)CLPC_PARAM_OPT, (char*)argv_a[index]) == (int)0) {
      strcpy ((char*)tmp_string, (char*)argv_a[++index]);
      param_file_a = new char_1[strlen((char*)tmp_string)+1];
      strcpy ((char*)param_file_a, (char*)tmp_string);
    }

    // pick off input file option
    //
    else if (strcmp((char*)CLPC_INPUT_OPT, (char*)argv_a[index]) == (int)0) {
      strcpy ((char*)tmp_string, (char*)argv_a[++index]);
      input_file_a = new char_1[strlen((char*)tmp_string)+1];
      strcpy ((char*)input_file_a, (char*)tmp_string);
    }
    
    // pick off output file option
    //
    else if (strcmp((char*)CLPC_OUTPUT_OPT, (char*)argv_a[index]) == (int)0) {
      strcpy ((char*)tmp_string, (char*)argv_a[++index]);
      output_file_a = new char_1[strlen((char*)tmp_string)+1];
      strcpy ((char*)output_file_a, (char*)tmp_string);
    }
    
    // pick off debug option
    //
    else if (strcmp((char*)CLPC_DEBUG_OPT, (char*)argv_a[index]) == (int)0) {
      
      // save the debug level
      //
      debug_level_a = (int_4)atoi((char*)argv_a[++index]);
    }

    // pick off the rest of the numerical values
    //
    else if (strcmp((char*)CLPC_NUM_CHAN_OPT, (char*)argv_a[index]) == 0) {
      num_chan_a = atoi((char*)argv_a[++index]);
    }
    
    else if (strcmp((char*)CLPC_WINDOW_OPT, (char*)argv_a[index]) == 0) {
      window_a = atoi((char*)argv_a[++index]);
    }
    
    else if (strcmp((char*)CLPC_WIN_CENTER_OPT, (char*)argv_a[index]) == 0) {
      center_a = atof((char*)argv_a[++index]);
    }
    
    else if (strcmp((char*)CLPC_PRE_EMPHASIZE_OPT,
		    (char*)argv_a[index]) == 0) {
      pre_emphasize_value_a = atof((char*)argv_a[++index]);
    }
    
    else if (strcmp((char*)CLPC_LP_ORDER_OPT, (char*)argv_a[index]) == 0) {
      lp_order_a = atoi((char*)argv_a[++index]);
    }
    
    else if (strcmp((char*)CLPC_FREQ_OPT, (char*)argv_a[index]) == 0) {
      sf_a = atoi((char*)argv_a[++index]);
    }
    
    else if (strcmp((char*)CLPC_HAMMING_OPT, (char*)argv_a[index]) == 0) {
      method_a = SIGNAL_WINDOW_METHOD_HAMMING;
    }
    
    else if (strcmp((char*)CLPC_RECTANGULAR_OPT,
		    (char*)argv_a[index]) == 0) {
      method_a = SIGNAL_WINDOW_METHOD_RECTANGULAR;
    }
    
  }
  
  // exit gracefully
  //
  return ISIP_TRUE;
}