534 lines
24 KiB
C++
534 lines
24 KiB
C++
//
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// Copyright 2020 Electronic Arts Inc.
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//
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is free
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// software: you can redistribute it and/or modify it under the terms of
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// the GNU General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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// TiberianDawn.DLL and RedAlert.dll and corresponding source code is distributed
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// in the hope that it will be useful, but with permitted additional restrictions
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// under Section 7 of the GPL. See the GNU General Public License in LICENSE.TXT
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// distributed with this program. You should have received a copy of the
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// GNU General Public License along with permitted additional restrictions
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// with this program. If not, see https://github.com/electronicarts/CnC_Remastered_Collection
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/* $Header: F:\projects\c&c\vcs\code\cdfile.cpv 2.18 16 Oct 1995 16:48:10 JOE_BOSTIC $ */
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/***********************************************************************************************
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*** 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 ***
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***********************************************************************************************
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* *
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* Project Name : Westwood Library *
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* *
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* File Name : CDFILE.CPP *
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* *
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* Programmer : Joe L. Bostic *
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* *
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* Start Date : October 18, 1994 *
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* *
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* Last Update : October 18, 1994 [JLB] *
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* CDFileClass::Clear_Search_Drives -- Removes all record of a search path. *
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* CDFileClass::Open -- Opens the file object -- with path search. *
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* CDFileClass::Open -- Opens the file wherever it can be found. *
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* CDFileClass::Set_Name -- Performs a multiple directory scan to set the filename. *
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* CDFileClass::Set_Search_Drives -- Sets a list of search paths for file access. *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "function.h"
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//#include "cdfile.h"
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/*
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** Pointer to the first search path record.
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*/
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CDFileClass::SearchDriveType * CDFileClass::First = 0;
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int CDFileClass::CurrentCDDrive = 0;
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int CDFileClass::LastCDDrive = 0;
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char CDFileClass::RawPath[512];
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int __cdecl Is_Disk_Inserted(int disk)
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{
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return true;
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#if (0) // ST - 12/17/2018 5:31PM
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struct find_t fb;
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char scan[] = "?:\\*.*";
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scan[0] = 'A' + disk;
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return(_dos_findfirst(scan, _A_SUBDIR, &fb) == 0);
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#endif
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}
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CDFileClass::CDFileClass(char const *filename) :
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IsDisabled(false)
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{
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Set_Name(filename);
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memset (RawPath, 0, sizeof(RawPath));
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}
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CDFileClass::CDFileClass(void) :
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IsDisabled(false)
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{
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}
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/***********************************************************************************************
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* CDFileClass::Open -- Opens the file object -- with path search. *
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* *
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* This will open the file object, but since the file object could have been constructed *
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* with a pathname, this routine will try to find the file first. For files opened for *
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* writing, then use the existing filename without performing a path search. *
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* *
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* INPUT: rights -- The access rights to use when opening the file *
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* *
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* OUTPUT: bool; Was the open successful? *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 10/18/1994 JLB : Created. *
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*=============================================================================================*/
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int CDFileClass::Open(int rights)
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{
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return(RawFileClass::Open(rights));
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}
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/***********************************************************************************************
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* CDFC::Refresh_Search_Drives -- Updates the search path when a CD changes or is added *
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 5/22/96 9:01AM ST : Created *
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*=============================================================================================*/
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void CDFileClass::Refresh_Search_Drives (void)
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{
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Clear_Search_Drives();
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Set_Search_Drives(RawPath);
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}
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/***********************************************************************************************
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* CDFileClass::Set_Search_Drives -- Sets a list of search paths for file access. *
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* *
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* This routine sets up a list of search paths to use when accessing files. The path list *
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* is scanned if the file could not be found in the current directory. This is the primary *
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* method of supporting CD-ROM drives, but is also useful for scanning network and other *
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* directories. The pathlist as passed to this routine is of the same format as the path *
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* list used by DOS -- paths are separated by semicolons and need not end in an antivirgule.*
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* *
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* If a path entry begins with "?:" then the question mark will be replaced with the first *
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* CD-ROM drive letter available. If there is no CD-ROM driver detected, then this path *
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* entry will be ignored. By using this feature, you can always pass the CD-ROM path *
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* specification to this routine and it will not break if the CD-ROM is not loaded (as in *
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* the case during development). *
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* *
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* Here is an example path specification: *
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* *
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* Set_Search_Drives("DATA;?:\DATA;F:\PROJECT\DATA"); *
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* *
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* In this example, the current directory will be searched first, followed by a the *
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* subdirectory "DATA" located off of the current directory. If not found, then the CD-ROM *
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* will be searched in a directory called "\DATA". If not found or the CD-ROM is not *
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* present, then it will look to the hard coded path of "F:\PROJECTS\DATA" (maybe a *
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* network?). If all of these searches fail, the file system will default to the current *
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* directory and let the normal file error system take over. *
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* *
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* INPUT: pathlist -- Pointer to string of path specifications (separated by semicolons) *
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* that will be used to search for files. *
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* *
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* OUTPUT: none *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 10/18/1994 JLB : Created. *
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* 05/21/1996 ST : Modified to recognise multiple CD drives *
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*=============================================================================================*/
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int CDFileClass::Set_Search_Drives(char * pathlist)
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{
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int found = FALSE;
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int empty = FALSE;
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/*
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** If there is no pathlist to add, then just return.
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*/
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if (!pathlist) return(0);
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/*
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** Save the path as it was passed in so we can parse it again later.
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** Check for the case where RawPath was passed in.
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*/
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if (pathlist != RawPath){
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strcat (RawPath, ";");
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strcat (RawPath, pathlist);
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}
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char const * ptr = strtok(pathlist, ";");
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while (ptr) {
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if (strlen(ptr)){
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char path[MAX_PATH]; // Working path buffer.
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/*
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** Fixup the path to be legal. Legal is defined as all that is necessary to
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** create a pathname is to append the actual filename submitted to the
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** file system. This means that it must have either a trailing ':' or '\'
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** character.
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*/
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strcpy(path, ptr);
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switch (path[strlen(path)-1]) {
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case ':':
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case '\\':
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break;
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default:
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strcat(path, "\\");
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break;
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}
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/*
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** If there is a drive letter specified, and this drive letter is '?', then it should
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** be substituted with the CD-ROM drive letter. In the case of no CD-ROM attached, then
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** merely ignore this path entry.
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*/
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if (strncmp(path, "?:", 2) == 0) {
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if (CurrentCDDrive){
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found = TRUE;
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/*
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** If the drive has a C&C CD in it then add it to the path
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*/
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if (Get_CD_Index(CurrentCDDrive, 2*60) >= 0){
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path[0] = CurrentCDDrive + 'A';
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Add_Search_Drive(path);
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}
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}
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/*
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** Find the next path string and resubmit.
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*/
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ptr = strtok(NULL, ";");
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continue;
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}
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found = TRUE;
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Add_Search_Drive(path);
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}
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/*
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** Find the next path string and resubmit.
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*/
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ptr = strtok(NULL, ";");
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}
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if (!found) return(1);
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if (empty) return(2);
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return(0);
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}
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/***********************************************************************************************
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* CDFC::Set_CD_Drive -- sets the current CD drive letter *
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* *
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* *
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* *
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* INPUT: Nothing *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 5/22/96 9:39AM ST : Created *
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*=============================================================================================*/
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void CDFileClass::Set_CD_Drive (int drive)
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{
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LastCDDrive = CurrentCDDrive;
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CurrentCDDrive = drive;
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}
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/***********************************************************************************************
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* CDFC::Add_Search_Drive -- Add a new path to the search path list *
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* *
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* *
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* *
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* INPUT: path *
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* *
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* OUTPUT: Nothing *
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* *
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* WARNINGS: None *
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* *
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* HISTORY: *
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* 5/22/96 10:12AM ST : Created *
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*=============================================================================================*/
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void CDFileClass::Add_Search_Drive(char *path)
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{
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SearchDriveType *srch; // Working pointer to path object.
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/*
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** Allocate a record structure.
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*/
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srch = new SearchDriveType;
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/*
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** Attach the path to this structure.
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*/
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srch->Path = strdup(path);
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srch->Next = NULL;
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/*
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** Attach this path record to the end of the path chain.
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*/
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if (!First) {
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First = srch;
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} else {
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SearchDriveType * chain = First;
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while (chain->Next) {
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chain = (SearchDriveType *)chain->Next;
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}
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chain->Next = srch;
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}
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}
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/***********************************************************************************************
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* CDFileClass::Clear_Search_Drives -- Removes all record of a search path. *
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* *
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* Use this routine to clear out any previous path(s) set with Set_Search_Drives() *
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* function. *
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* *
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* INPUT: none *
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* *
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* OUTPUT: none *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 10/18/1994 JLB : Created. *
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*=============================================================================================*/
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void CDFileClass::Clear_Search_Drives(void)
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{
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SearchDriveType * chain; // Working pointer to path chain.
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chain = First;
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while (chain) {
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SearchDriveType *next;
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next = (SearchDriveType *)chain->Next;
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if (chain->Path) {
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free((char *)chain->Path);
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}
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delete chain;
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chain = next;
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}
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First = 0;
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}
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/***********************************************************************************************
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* CDFileClass::Set_Name -- Performs a multiple directory scan to set the filename. *
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* *
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* This routine will scan all the directories specified in the path list and if the file *
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* was found in one of the directories, it will set the filename to a composite of the *
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* correct directory and the filename. It is used to allow path searching when searching *
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* for files. Typical use is to support CD-ROM drives. This routine examines the current *
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* directory first before scanning through the path list. If after scanning the entire *
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* path list, the file still could not be found, then the file object's name is set with *
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* just the raw filename as passed to this routine. *
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* *
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* INPUT: filename -- Pointer to the filename to set as the name of this file object. *
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* *
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* OUTPUT: Returns a pointer to the final and complete filename of this file object. This *
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* may have a path attached to the file. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 10/18/1994 JLB : Created. *
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*=============================================================================================*/
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char const * CDFileClass::Set_Name(char const *filename)
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{
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/*
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** Try to find the file in the current directory first. If it can be found, then
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** just return with the normal file name setting process. Do the same if there is
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** no multi-drive search path.
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*/
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RawFileClass::Set_Name(filename);
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if (IsDisabled || !First || RawFileClass::Is_Available()) {
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return(File_Name());
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}
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/*
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** Attempt to find the file first. Check the current directory. If not found there, then
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** search all the path specifications available. If it still can't be found, then just
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** fall into the normal raw file filename setting system.
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*/
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SearchDriveType * srch = First;
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while (srch) {
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char path[_MAX_PATH];
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/*
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** Build a pathname to search for.
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*/
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strcpy(path, srch->Path);
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strcat(path, filename);
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/*
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** Check to see if the file could be found. The low level Is_Available logic will
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** prompt if necessary when the CD-ROM drive has been removed. In all other cases,
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** it will return false and the search process will continue.
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*/
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RawFileClass::Set_Name(path);
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if (RawFileClass::Is_Available()) {
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return(File_Name());
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}
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/*
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** It wasn't found, so try the next path entry.
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*/
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srch = (SearchDriveType *)srch->Next;
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}
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/*
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** At this point, all path searching has failed. Just set the file name to the
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** plain text passed to this routine and be done with it.
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*/
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RawFileClass::Set_Name(filename);
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return(File_Name());
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}
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/***********************************************************************************************
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* CDFileClass::Open -- Opens the file wherever it can be found. *
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* *
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* This routine is similar to the RawFileClass open except that if the file is being *
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* opened only for READ access, it will search all specified directories looking for the *
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* file. If after a complete search the file still couldn't be found, then it is opened *
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* using the normal RawFileClass system -- resulting in normal error procedures. *
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* *
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* INPUT: filename -- Pointer to the override filename to supply for this file object. It *
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* would be the base filename (sans any directory specification). *
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* *
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* rights -- The access rights to use when opening the file. *
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* *
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* OUTPUT: bool; Was the file opened successfully? If so then the filename may be different *
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* than requested. The location of the file can be determined by examining the *
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* filename of this file object. The filename will contain the complete *
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* pathname used to open the file. *
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* *
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* WARNINGS: none *
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* *
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* HISTORY: *
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* 10/18/1994 JLB : Created. *
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*=============================================================================================*/
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int CDFileClass::Open(char const *filename, int rights)
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{
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Close();
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/*
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** Verify that there is a filename associated with this file object. If not, then this is a
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** big error condition.
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*/
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if (!filename) {
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Error(ENOENT, false);
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}
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/*
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** If writing is requested, then multiple drive searching is not performed.
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*/
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if (IsDisabled || rights == WRITE) {
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return(RawFileClass::Open(filename, rights));
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}
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/*
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** Perform normal multiple drive searching for the filename and open
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** using the normal procedure.
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*/
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Set_Name(filename);
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return(RawFileClass::Open(rights));
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}
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#ifdef NEVER
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/* Get the drive letters if the CD's online */
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WORD __cdecl GetCDDrive(VOID)
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{
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_ES = FP_SEG(&cdDrive[0]);
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_BX = FP_OFF(&cdDrive[0]);
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_AX = 0x150d;
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geninterrupt(0x2F);
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return((WORD)(*cdDrive));
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}
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#endif
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int Get_CD_Drive(void)
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{
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#ifdef NEVER
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for (int index = 0; index < 26; index++) {
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union REGS regs;
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regs.w.ax = 0x150B;
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regs.w.bx = 0;
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regs.w.cx = index;
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int386(0x2F, ®s, ®s);
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if (regs.w.bx == 0xADAD) {
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return(index);
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}
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}
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return(0);
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#else
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// GetCDClass temp;
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// return(temp.GetCDDrive());
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return (0);
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#endif
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}
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const char *CDFileClass::Get_Search_Path(int index)
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{
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if (First == NULL) {
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return NULL;
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}
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SearchDriveType *sd = First;
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for (int i=0 ; i <= index ; i++) { // We want to loop once, even if index==0
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if (i == index) {
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return sd->Path;
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}
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sd = (SearchDriveType *) sd->Next;
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if (sd == NULL) {
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return NULL;
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}
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}
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return NULL;
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} |