/*
  Name     Main.c
  Author   Peter Wright
  Notice   (c)1998, GCSL. All Rights Reserved
  
  Notes    This is the main source file for Converter, a program that 
           will convert a binary file into a text .h file that can be
           included into a project. 

*/

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


/* Definitions for functions to come */
void PrintStatus();
void UpdateStatus();
int CheckFile( char * sFileToCheck );
void DisplayInfo ( char * sFileName, char * HeaderFile, 
		   char * sVariable, char * sComment );
void ConvertFile ( char * sFilename, char * HeaderFile, 
		   char * sVariable, char * sComment );

/* Globals*/
char sFilename[255];
char sHeaderFile[255];
char sComment[255];
char sVariable[255];


int main()
{
  int bDone;

  printf("Converter, Version 1.0, By Peter J. Wright\n");
  printf("(c) 1998, GCSL. All Rights Reserved.......\n");
  printf("\n\n\n");


  /*Get the name of the file to convert ( I know Gets is dangerous...but 
   it copes with strings with spaces in them.*/
  
  
  bDone = 0;
  while ( ! bDone )
    {
      printf("File to convert : ");
      gets( sFilename );

      bDone = CheckFile(sFilename );
      if ( !bDone )
	printf("\n\n\nThe file %s does not exist. Try again.\n\n\n", sFilename);
    }
 
  bDone = 0;
  while ( ! bDone )
   {
     printf("Name of Headerfile: ");
     gets( sHeaderFile );
   
     bDone = 1;

     /* Check that the user isn't overwriting the original file*/
     if ( strcmp( sFilename, sHeaderFile ) == 0 )
      {
        printf("You cannot use the same name as the input file.\n\n\n");
        bDone = 0;
      }

     /* Check that the user actually entered a name*/
     if ( strlen( sHeaderFile ) == 0 )
      {
        printf("You must enter a name for the output file.\n\n\n");
        bDone = 0;
      }
   }


   /* Now that we have the name of the input and output files, its time
    to get the name of the variable, and the comment string*/
   bDone = 0 ;
   while ( ! bDone ) 
    {
      printf("Enter a variable name : "); 
      gets( sVariable );
      
      bDone = 1;
      if ( strlen( sVariable ) == 0 )
       {
         printf("You have to enter a name for the array variable.\n\n\n");
         bDone = 0;
       }
    }

    printf("Enter a comment to go above the variable..Hit return when done\n\n\n");
    gets( sComment );

    DisplayInfo( sFilename, sHeaderFile, sVariable, sComment );
    ConvertFile( sFilename, sHeaderFile, sVariable, sComment );
    
    return (0);
    
}



int CheckFile( char * sFileToCheck )
{
  int bReturn;

  /* Checks to see if a file exists, by attempting to open it for reading*/
  FILE * TestFile;
  TestFile = fopen( sFileToCheck, "r");

  bReturn = ( TestFile != 0);
  if ( bReturn ) 
    fclose( TestFile );

  return( bReturn );
}

void PrintStatus()
{
  /* Prints a status bar header, ready for the user to update it */
  printf("|----Status bar------|\n\n\n");
}

void UpdateStatus()
{
  /* Updates the status bar, by printing . for position */
  static nPosition = 0;
  
  /* We need to space forward if this is the first time the routine got called*/
  if ( nPosition == 0 )
    printf(" ");

  /* Update the position*/
  nPosition++;

  /* If we are a multiple of 5 through the position, print a .*/
  if ( nPosition % 5 == 0)
    printf(".");
  
  /* If the position is now 100, meaning we are done, then we can newline*/
  if ( nPosition >= 100 )
    printf("\n\n\n");
}
  






void ConvertFile( char * sFilename, char * sHeaderFile, 
		  char * sVariable, char * sComment )

{
  /* Converts the file specified */
  FILE * InputFile;
  FILE * OutputFile;

  char HexCodes[] = { "0123456789ABCDEF" };
  char Input[10];
  long nIndex;

  /* Open the output file first, and dump out the generic header stuff*/
  OutputFile = fopen( sHeaderFile, "w" );
  fprintf(OutputFile, "/* %s */\n", sComment );
  fprintf(OutputFile, "char %s[] = {\n", sVariable );

  /* Now go ahead and open the input file*/
  InputFile = fopen( sFilename, "r");
  
  nIndex = 0;
  while ( !feof(InputFile) )
    {
      fread( Input, 1, 1, InputFile);
      
      if ( nIndex > 0 )
	fprintf(OutputFile, ", ");

      fprintf(OutputFile, "0x");
      fwrite( &HexCodes[ (((unsigned char)Input[0] & 0xF0) >> 4) ], 1, 1, OutputFile );
      fwrite( &HexCodes[ (((unsigned char)Input[0] & 0x0F)) ], 1, 1, OutputFile );

      nIndex++;
      
      if ( nIndex % 15 == 0 )
	fprintf(OutputFile, "\n" );
    }

  fprintf(OutputFile, "};");

  fclose(InputFile);
  fclose(OutputFile);

  printf("\n\nConversion complete!\n\n");
    
}



void DisplayInfo( char * sFilename, char * sHeaderFile, 
		  char * sVariable, char * sComment )
{
  /* Displays information on the selected conversion */

  printf("\n\n\n\n");
  printf("CONVERSION SUMMARY\n");
  printf("\n");
  printf("Input File : %s\n", sFilename);
  printf("Output File: %s\n", sHeaderFile);
  printf("\nBuilding output file as \n");
  printf("------------------------------------------------\n");
  printf("  /* %s */ \n", sComment);
  printf("  char %s[] = { ..... };\n",sVariable);
  printf("------------------------------------------------\n");
  printf("\n");

}