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//////////////////////////////////////////////////////////////////////////
// FUNCTION: GetLineAt
//
// By Giovanni Dicanio
//
//
// DESCRIPTION:
// ------------
// Reads a specified line from text file.
// The line index is 1-based.
// The line is stored into a buffer provided by the caller.
// Returns true on success, false on error.
//
//
// NOTE:
// -----
// - Works on *chars*, not WCHARs.
//
//////////////////////////////////////////////////////////////////////////
bool GetLineAt(
    const char * filename, 
    char * buffer,
    int bufferSize,
    int lineCount
    )
{
    // Check input parameters
    ASSERT( filename != NULL );
    ASSERT( buffer != NULL );
    ASSERT( bufferSize > 0 );
    ASSERT( lineCount > 0 );

    // Open the file
    FILE * file = fopen( filename, "r" );
    if ( file == NULL )
        return false;

    // Loop until you find the specified line, or EOF is reached
    int lineIndex = 1;  // Count lines (1-based)
    bool ok = false;    // Function succeeded ?
    while ( fgets( buffer, bufferSize, file ) )
    {
        if ( lineIndex == lineCount )
        {
            // Successfully read specified line
            ok = true;
            break;  
        }

        // Update line counter
        lineIndex++;
    }

    // On error, clear the buffer, so we don't have spurious data
    // stored in it.
    if ( ! ok )
    {
        memset( buffer, 0, bufferSize );
    }

    // Close file
    fclose( file );
    file = NULL;

    // Return result of operations
    return ok;
}


//
// ** Can use like so: **
//
//  
//
//  static const int bufSize = 120;
//  char buffer[ bufSize ];
//
//  // Get 4th line from file
//  bool ok = GetLineAt( "D:\\test.txt", buffer, bufSize, 4 );
//
//  
//