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CnC_Red_Alert/WIN32LIB/SRCDEBUG/FILEINIT.CPP

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Initial commit of Command & Conquer Red Alert source code.
2025-02-27 17:15:05 +01:00
/*
** Command & Conquer Red Alert(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 A S S O C I A T E S **
***************************************************************************
* *
* Project Name : Library - Fileio init routines. *
* *
* File Name : FILEINIT.C *
* *
* Programmer : Scott K. Bowen *
* *
* Start Date : September 13, 1993 *
* *
* Last Update : April 19, 1994 [SKB] *
* *
*-------------------------------------------------------------------------*
* Functions: *
* WWDOS_Init -- Initialize the fileio WWS fileio system. *
* WWDOS_Shutdown -- Clean up any things that needs to be to exit game. *
* Init_FileData_Table -- Initializes or reads in FileData Table. *
* Sort_FileData_Table -- Sorts the FileData table that is in memory. *
* Preload_Files -- Loads files marked with FILEF_PRELOAD into cache. *
* Init_File_Cache -- Initializes and allocs the file cache heap. *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#ifndef WWSTD_H
#include "wwstd.h"
#endif
#ifndef _FILE_H
#include "_file.h"
#endif
#ifndef WWMEM_H
#include <wwmem.h>
#endif
#ifndef MISC_H
#include <misc.h>
#endif
#include <direct.h>
#include <search.h>
#include <string.h>
/*=========================================================================*/
/* The following PRIVATE functions are in this file: */
/*=========================================================================*/
PRIVATE FileInitErrorType cdecl Init_File_Cache(ULONG cachesize);
PRIVATE FileInitErrorType cdecl Init_FileData_Table(BYTE const *filename);
PRIVATE FileInitErrorType cdecl Set_Search_Drives( BYTE *cdpath );
PRIVATE FileInitErrorType cdecl Preload_Files(VOID);
PRIVATE int QSort_Comp_Func(const void *p1, const void *p2);
PRIVATE VOID Sort_FileData_Table(VOID);
/*= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =*/
/***************************************************************************
* WWDOS_INIT -- Initialize the fileio WWS fileio system. *
* *
* *
* INPUT: ULONG cachesize - size wanted for the cache. *
* BYTE *filedat - NULL or name of filedata table file. *
* BYTE *cdpath - NULL or secondary search path on a CD. *
* *
* OUTPUT: Returns all errors encountered or'd together. *
* *
* WARNINGS: User should call the WWDOS_Init function for all file *
* initialization. *
* *
* HISTORY: *
* 04/19/1994 SKB : Created. *
*=========================================================================*/
FileInitErrorType cdecl WWDOS_Init(ULONG cachesize, BYTE *filedata, BYTE *cdpath)
{
// FileInitErrorType errors;
unsigned errors ;
// This has not been completed yet, when it is, uncomment it and add errors.
Install_Hard_Error_Handler () ;
Get_Devices();
if (cachesize) {
errors = Init_File_Cache(cachesize);
} else {
errors = FI_SUCCESS;
}
errors = errors | Init_FileData_Table(filedata);
errors = errors | Set_Search_Drives(cdpath);
errors = errors | Preload_Files();
return ( FileInitErrorType ) errors ;
}
/***************************************************************************
* WWDOS_SHUTDOWN -- Clean up any things that needs to be in file syste to *
* exit game. *
* One could shut down the file system and open it back *
* up with a different size cache or filetable. *
* *
* INPUT: NONE. *
* *
* OUTPUT: NONE. *
* *
* WARNINGS: *
* *
* HISTORY: *
* 04/19/1994 SKB : Created. *
*=========================================================================*/
VOID cdecl WWDOS_Shutdown(VOID)
{
FileDataType *filedata; // Pointer to the current FileData.
WORD file_handle;
FileHandleType *filehandletable; // Pointer to the current file handle.
// Close all open files.
filehandletable = FileHandleTable;
for (file_handle = 0; file_handle < TABLE_MAX; file_handle++, filehandletable++) {
if (!filehandletable->Empty) {
Close_File(file_handle);
}
}
// Free the file cache heap.
if (FileCacheHeap) {
// Get a pointer to the current filedata.
if (FileDataPtr) {
filedata = FileDataPtr;
} else {
filedata = FileData;
}
while(filedata->Name && filedata->Name[0]) {
filedata->Ptr = NULL;
filedata++;
}
Free(FileCacheHeap);
FileCacheHeap = NULL;
}
// Free up the file data.
if (FileDataPtr != FileData) {
Free(FileDataPtr);
}
FileDataPtr = NULL;
chdir(StartPath);
ibm_setdisk(*StartPath - 'A');
// This has not been completed yet, when it is, uncomment it and add errors.
Remove_Hard_Error_Handler();
}
/***************************************************************************
* INIT_FILE_CACHE -- Initializes and allocs the file cache heap. *
* *
* INPUT: ULONG cachesize - size of heap cache.. *
* *
* OUTPUT: FileInitErrorType error code. *
* *
* WARNINGS: *
* *
* HISTORY: *
* 04/19/1994 SKB : Created. *
*=========================================================================*/
PRIVATE FileInitErrorType cdecl Init_File_Cache(ULONG cachesize)
{
// Allocate and initialize the file cache heap.
if (FileCacheHeap) {
return (FI_CACHE_ALREADY_INIT);
}
if ((Ram_Free(MEM_NORMAL) >= cachesize)) {
FileCacheHeap = Alloc(cachesize, MEM_NORMAL);
Mem_Init(FileCacheHeap, cachesize);
}
if (!FileCacheHeap) {
return (FI_CACHE_TOO_BIG);
}
return (FI_SUCCESS);
}
/***************************************************************************
* INIT_FILEDATA_TABLE -- Initializes or reads in FileData Table. *
* *
* INPUT: *
* *
* OUTPUT: FileInitErrorType error code. *
* *
* WARNINGS: *
* *
* HISTORY: *
* 09/13/1993 SKB : Created. *
*=========================================================================*/
PRIVATE FileInitErrorType cdecl Init_FileData_Table(BYTE const *filename)
{
WORD fd;
ULONG fsize;
FileDataType *ptr;
WORD index;
BYTE fname[13];
/*
** Inialize the file handle table to reflect no files open.
*/
for (index = 0; index < TABLE_MAX; index++) {
FileHandleTable[index].Empty = TRUE;
}
// Set up our FileData ptr to be the initial FileData table.
FileDataPtr = FileData;
// Sort the filedata table.
// This needs to be done even if we load it off disk since the initial file data
// table might contain a filename.
Sort_FileData_Table();
// If there is a file name, then the filedata table will be loaded from disk.
if (filename) {
if (!Find_File(filename)) {
return (FI_FILEDATA_FILE_NOT_FOUND);
}
fd = Open_File(filename, READ);
fsize = File_Size(fd);
if ((Ram_Free(MEM_NORMAL) < fsize)) {
Close_File(fd);
return (FI_FILEDATA_TOO_BIG);
}
// Allocate some system memory.
// Setup the new FileDataPtr and this time.
FileDataPtr = ptr = (FileDataType *) Alloc(fsize, MEM_NORMAL);
// Load the file up into memory.
Read_File(fd, FileDataPtr, fsize);
Close_File(fd);
// Process the filetable. The filenames need their pointers adjusted.
// At this time we will also count the number of files and number of PAK files.
NumPAKFiles = NumFiles = 0;
// Make sure that the file name will have a NUL at the end.
fname[12] = 0;
while(TRUE) {
// Have we reached the end of the list?
if (!ptr->Name) break;
// Adjust the name pointer to point the the correct area.
ptr->Name = (BYTE *)FileDataPtr + (LONG) ptr->Name;
// Count up weather it is a PAK file or a normal file.
if (!NumFiles && strstr((char *) ptr->Name, (char *) ".PAK")) {
NumPAKFiles++;
// Mark that it has been processed so that Open_File() will not do it.
ptr->Flag |= FILEF_PROCESSED;
} else {
NumFiles++;
}
// Next record.
ptr++;
}
}
return (FI_SUCCESS);
}
/***************************************************************************
* Set_Search_Drives -- Sets up the CDRom and HardDrive paths. *
* *
* INPUT: BYTE *cdpath - path of data files on a CD. *
* Should pass in NULL for non CD products. *
* *
* OUTPUT: FileInitErrorType error code. *
* Varibable defined: *
* ExecPath = Full path of EXE file. *
* StartPath = Directory user started in. *
* DataPath = secondary search path (typically CD-ROM). *
* Note: format of paths is "C:\PATH" *
* *
* WARNINGS: The cdpath may be overiden by a "-CD<path>" command line *
* arguement that specifies another drive (HARD or CD) and path *
* where the data resides. Whenever a file is opened, it checks *
* the startup drive first, then the CD search path if the first *
* search was unsuccessful. *
* *
* HISTORY: *
* 01/14/1993 SB : Created. *
* 04/19/1994 SKB : Mods for 32 bit library. *
*=========================================================================*/
PRIVATE FileInitErrorType cdecl Set_Search_Drives( BYTE *cdpath )
{
BYTE *ptr;
#if LIB_EXTERNS_RESOLVED
// NOTE: THIS IS WRONG, THIS IS NOT THE WAY TO GET THE EXE's PATH.
// Locate the executable.
strcpy(ExecPath, _argv[0]);
// Find the very last '\' on the path.
ptr = strrchr((char *) ExecPath, (int) '\\');
#else
ptr = NULL;
#endif
// Remove the exe name to just have the path.
if (ptr == NULL) {
*ExecPath = 0;
}
else {
*ptr = 0;
}
// Did the user specify a second path?
ptr = Find_Argv("-CD");
// If so, set the data path to that.
if (ptr) {
strcpy(DataPath, ptr + 3);
}
// Otherwise check to see if there is a CD-Rom drive.
else {
if (cdpath && *cdpath) {
#if LIB_EXTERNS_RESOLVED
UseCD = GetCDDrive();
#else
UseCD = FALSE;
#endif
}
else {
UseCD = FALSE;
}
// If so, set the Drive to it and find out if any directories.
if ( UseCD ) {
strcpy( DataPath, "A:" );
strcat( DataPath, cdpath);
*DataPath = 'A'+UseCD;
}
// If not, set the Data path to the execacutable path.
else {
strcpy(DataPath, ExecPath);
}
}
// Finnally, set the starting path.
getcwd(StartPath, XMAXPATH);
// Make sure they are all uppercase.
strupr(StartPath);
strupr(DataPath);
strupr(ExecPath);
// Change directories to the secondary search path (DataPath).
if (*DataPath && chdir(DataPath)) {
return (FI_SEARCH_PATH_NOT_FOUND);
}
// Lastley, Make sure we are in the startup directory. This will overide
// the secondary data path if they are on the same drive.
if (chdir(StartPath)) {
return (FI_STARTUP_PATH_NOT_FOUND);
}
return (FI_SUCCESS);
}
/***************************************************************************
* PRELOAD_FILES -- Loads files marked with FILEF_PRELOAD into cache. *
* *
* *
* INPUT: none. *
* *
* OUTPUT: FileInitErrorType error code. *
* *
* WARNINGS: The FileData must be initialized and the file heap initialized*
* in order for this to work. *
* *
* HISTORY: *
* 04/19/1994 SKB : Created. *
*=========================================================================*/
PRIVATE FileInitErrorType cdecl Preload_Files(VOID)
{
FileDataType *filedata; // Working file data table pointer.
BOOL oldflag; // Previous file flag.
if (!FileDataPtr) {
return (FI_FILETABLE_NOT_INIT);
}
if (!FileCacheHeap) {
return (FI_NO_CACHE_FOR_PRELOAD);
}
/*
** Make all files flagged to be made resident at startup, resident.
*/
filedata = FileDataPtr;
while (filedata->Name && strlen(filedata->Name)) {
if (filedata->Flag & FILEF_PRELOAD) {
oldflag = filedata->Flag;
filedata->Flag |= FILEF_RESIDENT; // Make it resident.
filedata->Flag &= ~FILEF_FLUSH; // Don't purge on Close_File.
Close_File(Open_File(filedata->Name, READ));
filedata->Flag &= ~(FILEF_RESIDENT|FILEF_FLUSH); // Clear bits.
filedata->Flag |= oldflag & (FILEF_RESIDENT|FILEF_FLUSH); // Restore bits.
}
filedata++;
}
return (FI_SUCCESS);
}
/***************************************************************************
* SORT_FILEDATA_TABLE -- Sorts the FileData table that is in memory. *
* *
* INPUT: NONE *
* *
* OUTPUT: NONE. *
* *
* WARNINGS: *
* *
* HISTORY: *
* 09/13/1993 SKB : Created. *
*=========================================================================*/
PRIVATE int QSort_Comp_Func(const void *p1, const void *p2)
{
return(strcmp(((FileDataType*)p1)->Name, ((FileDataType*)p2)->Name));
}
PRIVATE VOID Sort_FileData_Table(VOID)
{
/*
** Sort the filetable it but keep the pack file indexes correct.
*/
/*
** The number of pak files in the file table.
*/
NumPAKFiles = 0;
strupr(FileData[NumPAKFiles].Name);
while (strstr((char *) FileData[NumPAKFiles].Name, (char *) ".PAK")) {
strupr(FileData[NumPAKFiles].Name);
NumPAKFiles++;
}
/*
** Count the remaining files within the file table.
*/
NumFiles = 0;
while(FileData[NumFiles+NumPAKFiles].Name && FileData[NumFiles+NumPAKFiles].Name[0]) {
strupr(FileData[NumFiles+NumPAKFiles].Name);
NumFiles++;
}
/*
** Sort the file entries (past the pak files).
*/
if (NumFiles) {
qsort(&FileData[NumPAKFiles], NumFiles, sizeof(FileDataType), QSort_Comp_Func);
}
}

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