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CnC_Remastered_Collection/TIBERIANDAWN/CDFILE.CPP
PG-SteveT 03416d24e1 Initial Source Code commit 
Initial commit of original Tiberian Dawn and Red Alert source code converted to build as DLLs, and compatible with the release version of Command & Conquer Remastered.
2020-05-27 12:16:20 -07:00

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