// // 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 /*********************************************************************************************** *** 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 * * * * File Name : CCFILE.CPP * * * * Programmer : Joe L. Bostic * * * * Start Date : August 8, 1994 * * * * Last Update : March 20, 1995 [JLB] * * * *---------------------------------------------------------------------------------------------* * Functions: * * CCFileClass::CCFileClass -- Default constructor for file object. * * CCFileClass::CCFileClass -- Filename based constructor for C&C file. * * CCFileClass::Close -- Closes the file. * * CCFileClass::Is_Available -- Checks for existence of file on disk or in mixfile. * * CCFileClass::Is_Open -- Determines if the file is open. * * CCFileClass::Open -- Opens a file from either the mixfile system or the rawfile system. * * CCFileClass::Read -- Reads data from the file. * * CCFileClass::Seek -- Moves the current file pointer in the file. * * CCFileClass::Size -- Determines the size of the file. * * CCFileClass::Write -- Writes data to the file (non mixfile files only). * * CCFileClass::Error -- Handles displaying a file error message. * * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ #include "function.h" //#include //#include //#include //#include //#include //#include //#include "ccfile.h" /*********************************************************************************************** * CCFileClass::Error -- Handles displaying a file error message. * * * * Display an error message as indicated. If it is allowed to retry, then pressing a key * * will return from this function. Otherwise, it will exit the program with "exit()". * * * * INPUT: error -- The error number (same as the DOSERR.H error numbers). * * * * canretry -- Can this routine exit normally so that retrying can occur? If this is * * false, then the program WILL exit in this routine. * * * * filename -- Optional filename to report with this error. If no filename is * * supplied, then no filename is listed in the error message. * * * * OUTPUT: none, but this routine might not return at all if the "canretry" parameter is * * false or the player pressed ESC. * * * * WARNINGS: This routine may not return at all. It handles being in text mode as well as * * if in a graphic mode. * * * * HISTORY: * * 10/17/1994 JLB : Created. * *=============================================================================================*/ void CCFileClass::Error(int , int , char const * ) { #ifdef DEMO if (strstr(File_Name(), "\\")) { if (!Force_CD_Available(-1)) { Prog_End(); if (!RunningAsDLL) { exit(EXIT_FAILURE); } } } #else if (!Force_CD_Available(RequiredCD)) { Prog_End("CCFileClass::Error CD not found", true); if (!RunningAsDLL) { exit(EXIT_FAILURE); } } #endif } /*********************************************************************************************** * CCFileClass::CCFileClass -- Filename based constructor for C&C file. * * * * Use this constructor for a file when the filename is known at construction time. * * * * INPUT: filename -- Pointer to the filename to use for this file object. * * * * OUTPUT: none * * * * WARNINGS: The filename pointer is presumed to be inviolate throughout the duration of * * the file object. If this is not guaranteed, then use the default constructor * * and then set the name manually. * * * * HISTORY: * * 03/20/1995 JLB : Created. * *=============================================================================================*/ CCFileClass::CCFileClass(char const *filename) : CDFileClass(), FromDisk(false), Pointer(0), Position(0), Length(0), Start(0) { Set_Name(filename); } /*********************************************************************************************** * CCFileClass::CCFileClass -- Default constructor for file object. * * * * This is the default constructor for a C&C file object. * * * * INPUT: none * * * * OUTPUT: none * * * * WARNINGS: none * * * * HISTORY: * * 03/20/1995 JLB : Created. * *=============================================================================================*/ CCFileClass::CCFileClass(void) { FromDisk = false; Pointer = 0; Position = 0; Length = 0; Start = 0; } /*********************************************************************************************** * CCFileClass::Write -- Writes data to the file (non mixfile files only). * * * * This routine will write data to the file, but NOT to a file that is part of a mixfile. * * * * INPUT: buffer -- Pointer to the buffer that holds the data to be written. * * * * size -- The number of bytes to write. * * * * OUTPUT: Returns the number of bytes actually written. * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ long CCFileClass::Write(void const *buffer, long size) { /* ** If this is part of a mixfile, then writing is not allowed. Error out with a fatal ** message. */ if (Pointer || FromDisk) { Error(EACCES, false, File_Name()); } return(CDFileClass::Write(buffer, size)); } /*********************************************************************************************** * CCFileClass::Read -- Reads data from the file. * * * * This routine determines if the file is part of the mixfile system. If it is, then * * the file is copied from RAM if it is located there. Otherwise it is read from disk * * according to the correct position of the file within the parent mixfile. * * * * INPUT: buffer -- Pointer to the buffer to place the read data. * * * * size -- The number of bytes to read. * * * * OUTPUT: Returns the actual number of bytes read (this could be less than requested). * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ long CCFileClass::Read(void *buffer, long size) { int opened = false; if (!Is_Open()) { if (Open()) { opened = true; } } /* ** If the file is part of a loaded mixfile, then a mere copy is ** all that is required for the read. */ if (Pointer) { long maximum = Length - Position; size = MIN(maximum, size); if (size) { Mem_Copy(Add_Long_To_Pointer(Pointer, Position), buffer, size); Position += size; } if (opened) Close(); return(size); } /* ** If the file is part of a mixfile, but the mixfile is located ** on disk, then a special read operation is necessary. */ if (FromDisk) { long maximum = Length - Position; size = MIN(maximum, size); if (size > 0) { CDFileClass::Seek(Start + Position, SEEK_SET); size = CDFileClass::Read(buffer, size); Position += size; } if (opened) Close(); return(size); } long s = CDFileClass::Read(buffer, size); if (opened) Close(); return(s); } /*********************************************************************************************** * CCFileClass::Seek -- Moves the current file pointer in the file. * * * * This routine will change the current file pointer to the position specified. It follows * * the same rules the a normal Seek() does, but if the file is part of the mixfile system, * * then only the position value needs to be updated. * * * * INPUT: pos -- The position to move the file to relative to the position indicated * * by the "dir" parameter. * * * * dir -- The direction to affect the position change against. This can be * * either SEEK_CUR, SEEK_END, or SEEK_SET. * * * * OUTPUT: Returns with the position of the new location. * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ long CCFileClass::Seek(long pos, int dir) { if (Pointer || FromDisk) { switch (dir) { case SEEK_END: Position = Length; break; case SEEK_SET: Position = 0; break; case SEEK_CUR: default: break; } Position += pos; if (Position < 0) Position = 0; if (Position > Length) Position = Length; return(Position); } return(CDFileClass::Seek(pos, dir)); } /*********************************************************************************************** * CCFileClass::Size -- Determines the size of the file. * * * * If the file is part of the mixfile system, then the size of the file is already * * determined and available. Otherwise, go to the low level system to find the file * * size. * * * * INPUT: none * * * * OUTPUT: Returns with the size of the file in bytes. * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ long CCFileClass::Size(void) { if (Pointer || FromDisk) return(Length); return(CDFileClass::Size()); } /*********************************************************************************************** * CCFileClass::Is_Available -- Checks for existence of file on disk or in mixfile. * * * * This routine will examine the mixfile system looking for the file. If the file could * * not be found there, then the disk is examined directly. * * * * INPUT: none * * * * OUTPUT: bool; Is the file available for opening? * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ int CCFileClass::Is_Available(int ) { if (MixFileClass::Offset(File_Name())) { return(true); } return(CDFileClass::Is_Available()); } /*********************************************************************************************** * CCFileClass::Is_Open -- Determines if the file is open. * * * * A mixfile is open if there is a pointer to the mixfile data. In absence of this, * * the the file is open if the file handle is valid. * * * * INPUT: none * * * * OUTPUT: bool; Is the file open? * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ int CCFileClass::Is_Open(void) const { /* ** If the file is part of a cached file, then return that it is opened. A closed file ** doesn't have a valid pointer. */ if (Pointer) return(true); return(CDFileClass::Is_Open()); } /*********************************************************************************************** * CCFileClass::Close -- Closes the file. * * * * If this is a mixfile file, then only the pointers need to be adjusted. * * * * INPUT: none * * * * OUTPUT: none * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ void CCFileClass::Close(void) { FromDisk = false; Pointer = 0; Position = 0; // Starts at beginning offset. Start = 0; Length = 0; CDFileClass::Close(); } /*********************************************************************************************** * CCFileClass::Open -- Opens a file from either the mixfile system or the rawfile system. * * * * This routine will open the specified file. It examines the mixfile system to find a * * match. If one is found then the file is "opened" in a special cached way. Otherwise * * it is opened as a standard DOS file. * * * * INPUT: rights -- The access rights desired. * * * * OUTPUT: bool; Was the file opened successfully? * * * * WARNINGS: none * * * * HISTORY: * * 08/08/1994 JLB : Created. * *=============================================================================================*/ int CCFileClass::Open(int rights) { /* ** Always close the file if it was open. */ Close(); /* ** Perform a preliminary check to see if the specified file ** exists on the disk. If it does, then open this file regardless ** of whether it also exists in RAM. This is slower, but allows ** upgrade files to work. */ if ((rights & WRITE) || CDFileClass::Is_Available()) { return(CDFileClass::Open(rights)); } /* ** Check to see if file is part of a mixfile and that mixfile is currently loaded ** into RAM. */ MixFileClass *mixfile = 0; if (MixFileClass::Offset(File_Name(), &Pointer, &mixfile, &Start, &Length)) { /* ** If the mixfile is located on disk, then fake out the file system to read from ** the mixfile, but think it is reading from a solitary file. */ if (!Pointer) { long start = Start; long length = Length; /* ** This is a legitimate open to the file. All access to the file through this ** file object will be appropriately adjusted for mixfile support however. Also ** note that the filename attached to this object is NOT the same as the file ** attached to the file handle. */ char const * dupfile = strdup(File_Name()); Open(mixfile->Filename, READ); Searching(false); // Disable multi-drive search. Set_Name(dupfile); Searching(true); if (dupfile) free((void *)dupfile); Start = start; Length = length; FromDisk = true; } } else { /* ** The file cannot be found in any mixfile, so it must reside as ** an individual file on the disk. Or else it is just plain missing. */ return(CDFileClass::Open(rights)); } return(true); } /*********************************************************************************** ** Backward compatibility section. */ //extern "C" { static CCFileClass Handles[10]; #ifdef NEVER bool __cdecl Set_Search_Drives(char const *) { CCFileClass::Set_Search_Path(path); return(true); } #endif int __cdecl Open_File(char const *file_name, int mode) { for (int index = 0; index < sizeof(Handles)/sizeof(Handles[0]); index++) { if (!Handles[index].Is_Open()) { Handles[index].Set_Name(file_name); if (Handles[index].Open(mode)) { // if (Handles[index].Open(file_name, mode)) { return(index); } break; } } return(WW_ERROR); } VOID __cdecl Close_File(int handle) { if (handle != WW_ERROR && Handles[handle].Is_Open()) { Handles[handle].Close(); } } LONG __cdecl Read_File(int handle, VOID *buf, ULONG bytes) { if (handle != WW_ERROR && Handles[handle].Is_Open()) { return(Handles[handle].Read(buf, bytes)); } return(0); } LONG __cdecl Write_File(int handle, VOID const *buf, ULONG bytes) { if (handle != WW_ERROR && Handles[handle].Is_Open()) { return(Handles[handle].Write(buf, bytes)); } return(0); } int __cdecl Find_File(char const *file_name) { CCFileClass file(file_name); return(file.Is_Available()); } #ifdef NEVER int __cdecl Delete_File(char const *file_name) { return(CCFileClass(file_name).Delete()); } int __cdecl Create_File(char const *file_name) { return(CCFileClass(file_name).Create()); } ULONG __cdecl Load_Data(char const *name, VOID *ptr, ULONG size) { return(CCFileClass(name).Read(ptr, size)); } #endif VOID * __cdecl Load_Alloc_Data(char const *name, int ) { CCFileClass file(name); return(Load_Alloc_Data(file)); } ULONG __cdecl File_Size(int handle) { if (handle != WW_ERROR && Handles[handle].Is_Open()) { return(Handles[handle].Size()); } return(0); } #ifdef NEVER ULONG __cdecl Write_Data(char const *name, VOID const *ptr, ULONG size) { return(CCFileClass(name).Write(ptr, size)); } #endif ULONG __cdecl Seek_File(int handle, LONG offset, int starting) { if (handle != WW_ERROR && Handles[handle].Is_Open()) { return(Handles[handle].Seek(offset, starting)); } return(0); } void WWDOS_Shutdown(void) { for (int index = 0; index < 10; index++) { Handles[index].Set_Name(NULL); } } #ifdef NEVER bool __cdecl Multi_Drive_Search(bool on) { // return(CCFileClass::Multi_Drive_Search(on)); return(on); } VOID __cdecl WWDOS_Init(VOID) { } VOID __cdecl WWDOS_Shutdown(VOID) { } int __cdecl Find_Disk_Number(char const *) { return(0); } #endif //ULONG cdecl Load_Uncompress(BYTE const *file, BuffType uncomp_buff, BuffType dest_buff, VOID *reserved_data) //{ // return(Load_Uncompress(CCFileClass(file), uncomp_buff, dest_buff, reserved_data)); // return(CCFileClass(file).Load_Uncompress(uncomp_buff, dest_buff, reserved_data)); //} //extern "C" { //int MaxDevice; //int DefaultDrive; //char CallingDOSInt; //} void Unfragment_File_Cache(void) { }