textfile.cpp

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/*
**  Command & Conquer Generals Zero Hour(tm)
**  Copyright 2025 Electronic Arts Inc.
**
**  This program is free software: you can redistribute it and/or modify
**  it under the terms of the GNU General Public License as published by
**  the Free Software Foundation, either version 3 of the License, or
**  (at your option) any later version.
**
**  This program is distributed in the hope that it will be useful,
**  but WITHOUT ANY WARRANTY; without even the implied warranty of
**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**  GNU General Public License for more details.
**
**  You should have received a copy of the GNU General Public License
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
 
/*********************************************************************************************** 
 ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               *** 
 *********************************************************************************************** 
 *                                                                                             * 
 *                 Project Name : Command & Conquer                                            * 
 *                                                                                             * 
 *                     $Archive:: /Commando/Code/wwlib/textfile.cpp                           $* 
 *                                                                                             * 
 *                      $Author:: Patrick                   $*
 *                                                                                             * 
 *                     $Modtime:: 7/26/01 9:37p                                               $*
 *                                                                                             * 
 *                    $Revision:: 4                                                           $*
 *                                                                                             *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 
#include "textfile.h"
#include "wwstring.h"
 

//
//  TextFileClass
//
TextFileClass::TextFileClass (void)
{
    return ;
}
 

//
//  TextFileClass
//
TextFileClass::TextFileClass (char const *filename)
    :   RawFileClass (filename)
{
    return ;
}
 

//
//  ~TextFileClass
//
TextFileClass::~TextFileClass (void)
{
    return ;
}
 

//
//  Read_Line
//
bool
TextFileClass::Read_Line (StringClass &string)
{
    //
    //  Start with a fresh string
    //
//  string.Empty ();
    string="";
 
    const int BUFFER_SIZE        = 64;
    char buffer[BUFFER_SIZE] = { 0 };
    bool keep_going             = true;
 
    while (keep_going) {
 
        //
        // Read a chunk of characters from the file
        //
        int size = Read (buffer, BUFFER_SIZE - 1);       
 
        //
        // Keep going if we still have more data to 
        // read from the file
        //
        keep_going = (size == BUFFER_SIZE - 1);
        if (size > 0) {         
            
            //
            // Try to find the linefeed character
            //
            for (int index = 0; index < size; index ++) {
                if (buffer[index] == '\n') {
                    
                    //
                    // Terminate the buffer after the linefeed
                    //
                    buffer[index + 1] = 0;
 
                    //
                    // Seek backwards in the file to the position
                    // directly after the linefeed
                    //
                    Seek (-(size - (index + 1)), SEEK_CUR);
                    keep_going = false;
                    break;
                }
            }
            
            //
            //  Concat this buffer to the end of the string
            //
            string += buffer;
        }
    }
 
    bool retval = (string.Get_Length () > 0);
    if (retval) {
        
        int len             = string.Get_Length ();
        char *raw_string    = string.Peek_Buffer ();
        
        //
        // Strip the CR\LF or LF from the string
        //      
        if (len > 1 && raw_string[len - 2] == '\r') {
            string.Erase (len - 2, 2);
            //raw_string[len - 2] = 0;
        } else if (raw_string[len - 1] == '\n') {
            string.Erase (len - 1, 1);
            //raw_string[len - 1] = 0;
        }
    }
    
    return retval;
}
 

//
//  Write_Line
//
bool
TextFileClass::Write_Line (const StringClass &string)
{
    bool retval = false;
 
    //
    // Write the line of text out to the file
    //
    int len = string.Get_Length ();
    int size = Write ((const char *)string, len);
 
    //
    // Now append a CR\LF pair to the end of the line
    //
    if (size == len) {
        retval = (Write ("\r\n", 2) == 2);
    }
 
    return retval;
}