445 lines
19 KiB
C++
445 lines
19 KiB
C++
/*
|
||
** 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/>.
|
||
*/
|
||
|
||
/* $Header: g:/library/wwlib32/file/rcs/load.cpp 1.4 1994/04/22 12:42:21 scott_bowen Exp $ */
|
||
/***************************************************************************
|
||
** 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 *
|
||
* *
|
||
* File Name : LOAD.C *
|
||
* *
|
||
* Programmer : Christopher Yates *
|
||
* *
|
||
* Last Update : September 17, 1993 [JLB] *
|
||
* *
|
||
*-------------------------------------------------------------------------*
|
||
* Functions: *
|
||
* Load_Uncompress -- Load and uncompress the given file. *
|
||
* Uncompress_Data -- Uncompress standard CPS buffer. *
|
||
* Load_Data -- Loads a data file from disk. *
|
||
* Load_Alloc_Data -- Loads and allocates buffer for a file. *
|
||
* Write_Data -- Writes a block of data as a file to disk. *
|
||
* Uncompress_Data -- Uncompresses data from one buffer to another. *
|
||
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
||
|
||
#include <wwstd.h>
|
||
#include "file.h"
|
||
#include "iff.h"
|
||
#include <misc.h>
|
||
#include <dos.h>
|
||
#include <wwmem.h>
|
||
|
||
|
||
|
||
#if(LZW_SUPPORTED)
|
||
|
||
/* These are our local pointer and size variables for the LZW table. They
|
||
are set through the Set_Uncomp_Buffer routine. */
|
||
|
||
PRIVATE int LZW_Table = 0; /* No current paragraph */
|
||
PRIVATE unsigned int LZW_Table_Size = 0; /* No current size */
|
||
|
||
#endif
|
||
|
||
|
||
/*=========================================================================*/
|
||
/* The following PRIVATE functions are in this file: */
|
||
/*=========================================================================*/
|
||
|
||
|
||
|
||
/*= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =*/
|
||
|
||
/***************************************************************************
|
||
* LOAD_DATA -- Loads a data file from disk. *
|
||
* *
|
||
* This routine will load a data file from disk. It does no translation*
|
||
* on the data. *
|
||
* *
|
||
* INPUT: name -- Pointer to ASCII filename of the data file. *
|
||
* *
|
||
* ptr -- Buffer to load the data file into. *
|
||
* *
|
||
* size -- Maximum size of the buffer (in bytes). *
|
||
* *
|
||
* OUTPUT: Returns with the number of bytes read. *
|
||
* *
|
||
* WARNINGS: none *
|
||
* *
|
||
* HISTORY: *
|
||
* 06/24/1991 JLB : Created. *
|
||
*=========================================================================*/
|
||
unsigned long cdecl Load_Data(char const *name, VOID *ptr, unsigned long size)
|
||
{
|
||
int fd;
|
||
|
||
fd = Open_File(name, READ);
|
||
size = Read_File(fd, ptr, size);
|
||
Close_File(fd);
|
||
return(size);
|
||
}
|
||
|
||
|
||
/***************************************************************************
|
||
* WRITE_DATA -- Writes a block of data as a file to disk. *
|
||
* *
|
||
* This routine will write a block of data as a file to the disk. It *
|
||
* is the compliment of Load_Data. *
|
||
* *
|
||
* INPUT: name -- Name of the file to create. *
|
||
* *
|
||
* ptr -- Pointer to the block of data to write. *
|
||
* *
|
||
* size -- Size of the data block to be written. *
|
||
* *
|
||
* OUTPUT: Returns with the number of bytes actually written. *
|
||
* *
|
||
* WARNINGS: none *
|
||
* *
|
||
* HISTORY: *
|
||
* 07/05/1992 JLB : Created. *
|
||
*=========================================================================*/
|
||
unsigned long cdecl Write_Data(char const *name, VOID *ptr, unsigned long size)
|
||
{
|
||
int fd;
|
||
|
||
fd = Open_File(name, WRITE);
|
||
size = Write_File(fd, ptr, size);
|
||
Close_File(fd);
|
||
return(size);
|
||
}
|
||
|
||
#ifdef NEVER
|
||
/***************************************************************************
|
||
* LOAD_ALLOC_DATA -- Loads and allocates buffer for a file. *
|
||
* *
|
||
* The routine will allocate a buffer and load the specified file into *
|
||
* it. The kind of memory used for the buffer is determined by the *
|
||
* memory allocation flags passed in. *
|
||
* *
|
||
* INPUT: name -- Name of the file to load. *
|
||
* *
|
||
* flags -- Memory allocation flags to use when allocating. *
|
||
* *
|
||
* OUTPUT: Returns with a pointer to the buffer that contains the file's *
|
||
* data. *
|
||
* *
|
||
* WARNINGS: A memory error could occur if regular memory flags are *
|
||
* specified. If XMS memory is specified, then this routine *
|
||
* could likely return NULL. *
|
||
* *
|
||
* HISTORY: *
|
||
* 05/28/1992 JLB : Created. *
|
||
*=========================================================================*/
|
||
VOID * cdecl Load_Alloc_Data(char const *name, MemoryFlagType flags)
|
||
{
|
||
int fd; // Working file handle.
|
||
unsigned long size; // Size of the file to load.
|
||
VOID *buffer; // Buffer to hold the file.
|
||
|
||
fd = Open_File(name, READ);
|
||
size = File_Size(fd);
|
||
buffer = Alloc(size, flags);
|
||
if (buffer) {
|
||
Read_File(fd, buffer, size);
|
||
}
|
||
Close_File(fd);
|
||
return(buffer);
|
||
}
|
||
#endif
|
||
|
||
|
||
/***************************************************************************
|
||
* LOAD_UNCOMPRESS -- Load and uncompress the given file. *
|
||
* *
|
||
* INPUT: BYTE * - file name to uncompress *
|
||
* GraphicBufferClass& - to load the source data into *
|
||
* GraphicBufferClass& - for the picture *
|
||
* VOID * - ptr for header uncompressed data *
|
||
* *
|
||
* OUTPUT: unsigned long size of uncompressed data *
|
||
* *
|
||
* WARNINGS: none *
|
||
* *
|
||
* HISTORY: *
|
||
* 05/28/1991 CY : Created. *
|
||
* 06/26/1991 JLB : Handles load & uncompress to same buffer. *
|
||
*=========================================================================*/
|
||
unsigned long cdecl Load_Uncompress(char const *file, BufferClass& uncomp_buff, BufferClass& dest_buff, VOID *reserved_data)
|
||
{
|
||
int fd; // Source file handle.
|
||
unsigned int isize; // Size of the file.
|
||
unsigned int skipsize; // Size of the skip data bytes.
|
||
VOID *uncomp_ptr; // Source buffer pointer.
|
||
char *newuncomp_ptr; // Adjusted source pointer.
|
||
|
||
|
||
uncomp_ptr = uncomp_buff.Get_Buffer(); // get a pointer to buffer
|
||
|
||
/*======================================================================*/
|
||
/* Read the file into the uncompression buffer. */
|
||
/*======================================================================*/
|
||
|
||
fd = Open_File(file, READ); // Open up the file to read from
|
||
Read_File(fd, (char *) &isize, 2L); // Read the file size
|
||
Read_File(fd, uncomp_ptr, 8L); // Read the header bytes in.
|
||
isize -= 8; // Remaining data in file.
|
||
|
||
/*======================================================================*/
|
||
/* Check for and read in the skip data block. */
|
||
/*======================================================================*/
|
||
|
||
skipsize = *(((int*)uncomp_ptr) + 3);
|
||
|
||
if (reserved_data && skipsize) {
|
||
Read_File(fd, reserved_data, (unsigned long) skipsize);
|
||
} else {
|
||
Seek_File(fd, skipsize, SEEK_CUR);
|
||
}
|
||
|
||
*( ((int*)uncomp_ptr+3) ) = 0; // K/O any skip value.
|
||
isize -= skipsize;
|
||
|
||
/*======================================================================*/
|
||
/* If the source and dest buffer are the same, we adjust the pointer so */
|
||
/* that the compressed data is loaded into the end of the buffer. In */
|
||
/* this way the uncompress code can write to the same buffer. */
|
||
/*======================================================================*/
|
||
newuncomp_ptr = (char *)Add_Long_To_Pointer(uncomp_buff.Get_Buffer(), uncomp_buff.Get_Size() - (isize+8L));
|
||
|
||
/*======================================================================*/
|
||
/* Duplicate the header bytes. */
|
||
/*======================================================================*/
|
||
Mem_Copy(uncomp_ptr,newuncomp_ptr,8);
|
||
|
||
/*======================================================================*/
|
||
/* Read in the main compressed part of the file. */
|
||
/*======================================================================*/
|
||
Read_File(fd, newuncomp_ptr + 8, (unsigned long)isize);
|
||
Close_File(fd);
|
||
|
||
/*======================================================================*/
|
||
/* Uncompress the file into the destination buffer (which may very well */
|
||
/* be the source buffer). */
|
||
/*======================================================================*/
|
||
return(Uncompress_Data(newuncomp_ptr, dest_buff.Get_Buffer()));
|
||
}
|
||
#if(0)
|
||
/***************************************************************************
|
||
* LOAD_UNCOMPRESS -- Load and uncompress the given file. *
|
||
* *
|
||
* INPUT: BYTE *file name to uncompress, BuffType uncomp_buff to load *
|
||
* the source data into, BuffType dest_buff for the picture, *
|
||
* VOID *reserved_data pointer for header uncompressed data *
|
||
* *
|
||
* OUTPUT: unsigned long size of uncompressed data *
|
||
* *
|
||
* WARNINGS: none *
|
||
* *
|
||
* HISTORY: *
|
||
* 05/28/1991 CY : Created. *
|
||
* 06/26/1991 JLB : Handles load & uncompress to same buffer. *
|
||
*=========================================================================*/
|
||
unsigned long cdecl Load_Uncompress(char const *file, BuffType uncomp_buff, BuffType dest_buff, VOID *reserved_data)
|
||
{
|
||
int fd; // Source file handle.
|
||
unsigned int isize; // Size of the file.
|
||
unsigned int skipsize; // Size of the skip data bytes.
|
||
VOID *uncomp_ptr; // Source buffer pointer.
|
||
char *newuncomp_ptr; // Adjusted source pointer.
|
||
|
||
|
||
uncomp_ptr = Get_Buff(uncomp_buff); /* Get pointer to uncomp buffer */
|
||
|
||
/* Read the file into the uncomp_buff */
|
||
|
||
fd = Open_File(file, READ);
|
||
Read_File(fd, (char *) &isize, 2L); /* Read the file size */
|
||
#if(AMIGA)
|
||
isize = Reverse_WORD(isize);
|
||
#endif
|
||
|
||
Read_File(fd, uncomp_ptr, 8L); // Read the header bytes in.
|
||
isize -= 8; // Remaining data in file.
|
||
|
||
/*
|
||
** Check for and read in the skip data block.
|
||
*/
|
||
|
||
skipsize = *(((int*)uncomp_ptr) + 3);
|
||
#if(AMIGA)
|
||
skipsize = Reverse_WORD(skipsize);
|
||
#endif
|
||
|
||
if (reserved_data && skipsize) {
|
||
Read_File(fd, reserved_data, (unsigned long) skipsize);
|
||
} else {
|
||
Seek_File(fd, skipsize, SEEK_CUR);
|
||
}
|
||
*( ((int*)uncomp_ptr+3) ) = 0; // K/O any skip value.
|
||
isize -= skipsize;
|
||
|
||
/*
|
||
** If the source and dest buffer are the same, we
|
||
** adjust the pointer so that the compressed data is
|
||
** loaded into the end of the buffer. In this way the
|
||
** uncompress code can write to the same buffer.
|
||
*/
|
||
#if(IBM)
|
||
newuncomp_ptr = (char *)Add_Long_To_Pointer(Get_Buff(uncomp_buff), PageArraySize[uncomp_buff] - (isize+8L));
|
||
//newuncomp_ptr = (char*)MK_FP(PageArray[uncomp_buff],0);
|
||
//newuncomp_ptr += (unsigned int)(PageArraySize[uncomp_buff] - (isize+8));
|
||
//newuncomp_ptr = Normalize_Pointer(newuncomp_ptr);
|
||
//newuncomp_ptr = MK_FP(FP_SEG(newuncomp_ptr),0);
|
||
#else
|
||
newuncomp_ptr = Get_Buff(uncomp_buff);
|
||
newuncomp_ptr += PageArraySize[uncomp_buff] - ((isize+10) & 0xFFFE);
|
||
#endif
|
||
|
||
/*
|
||
** Duplicate the header bytes.
|
||
*/
|
||
Mem_Copy(uncomp_ptr,newuncomp_ptr,8);
|
||
|
||
/*
|
||
** Read in the main compressed part of the file.
|
||
*/
|
||
Read_File(fd, newuncomp_ptr + 8, (unsigned long)isize);
|
||
Close_File(fd);
|
||
|
||
return(Uncompress_Data(newuncomp_ptr, Get_Buff(dest_buff)));
|
||
}
|
||
|
||
#endif
|
||
/***************************************************************************
|
||
* Uncompress_Data -- Uncompresses data from one buffer to another. *
|
||
* *
|
||
* This routine takes data from a compressed file (sans the first two *
|
||
* size bytes) and uncompresses it to a destination buffer. The source *
|
||
* data MUST have the CompHeaderType at its start. *
|
||
* *
|
||
* INPUT: src -- Source compressed data pointer. *
|
||
* *
|
||
* dst -- Destination (paragraph aligned) pointer. *
|
||
* *
|
||
* OUTPUT: Returns with the size of the uncompressed data. *
|
||
* *
|
||
* WARNINGS: If LCW compression is used, the destination buffer must *
|
||
* be paragraph aligned. *
|
||
* *
|
||
* HISTORY: *
|
||
* 09/17/1993 JLB : Created. *
|
||
*=========================================================================*/
|
||
unsigned long cdecl Uncompress_Data(VOID const *src, VOID *dst)
|
||
{
|
||
unsigned int skip; // Number of leading data to skip.
|
||
CompressionType method; // Compression method used.
|
||
unsigned long uncomp_size=NULL;
|
||
#if(LZW_SUPPORTED)
|
||
VOID *table_buffer;
|
||
#endif
|
||
|
||
if (!src || !dst) return(NULL);
|
||
|
||
/*
|
||
** Interpret the data block header structure to determine
|
||
** compression method, size, and skip data amount.
|
||
*/
|
||
uncomp_size = ((CompHeaderType*)src)->Size;
|
||
#if(AMIGA)
|
||
uncomp_size = Reverse_LONG(uncomp_size);
|
||
#endif
|
||
skip = ((CompHeaderType*)src)->Skip;
|
||
#if(AMIGA)
|
||
skip = Reverse_WORD(skip);
|
||
#endif
|
||
method = (CompressionType) ((CompHeaderType*)src)->Method;
|
||
src = Add_Long_To_Pointer((VOID *)src, (long)sizeof(CompHeaderType) + (long)skip);
|
||
|
||
switch (method) {
|
||
|
||
default:
|
||
case NOCOMPRESS:
|
||
Mem_Copy((VOID *) src, dst, uncomp_size);
|
||
break;
|
||
|
||
case HORIZONTAL:
|
||
#if LIB_EXTERNS_RESOLVED
|
||
RLE_Uncompress((VOID *) src, dst, uncomp_size);
|
||
#endif
|
||
break;
|
||
|
||
case LCW:
|
||
LCW_Uncompress((VOID *) src, (VOID *) dst, (unsigned long) uncomp_size);
|
||
break;
|
||
|
||
#if(LZW_SUPPORTED)
|
||
case LZW12:
|
||
/* If the current buffer isn't big enough, try to
|
||
allocate one that is */
|
||
|
||
if (LZW_Table_Size < LZW12BUFFERSIZE) {
|
||
table_buffer = Alloc((long) LZW12BUFFERSIZE, MEM_PARA);
|
||
LZW12_Uncompress(FP_SEG(src), FP_SEG(dst),
|
||
FP_SEG(table_buffer));
|
||
Free(table_buffer);
|
||
}
|
||
else {
|
||
LZW12_Uncompress(FP_SEG(src), FP_SEG(dst), LZW_Table);
|
||
}
|
||
break;
|
||
|
||
case LZW14:
|
||
/* If the current buffer isn't big enough, try to
|
||
allocate one that is */
|
||
|
||
if (LZW_Table_Size < LZW14BUFFERSIZE) {
|
||
table_buffer = Alloc((long) LZW14BUFFERSIZE, MEM_PARA);
|
||
LZW14_Uncompress(FP_SEG(src), FP_SEG(dst),
|
||
FP_SEG(table_buffer));
|
||
Free(table_buffer);
|
||
}
|
||
else {
|
||
LZW14_Uncompress(FP_SEG(src), FP_SEG(dst), LZW_Table);
|
||
}
|
||
break;
|
||
#endif
|
||
}
|
||
|
||
return(uncomp_size);
|
||
}
|
||
|
||
|
||
#if(LZW_SUPPORTED)
|
||
/* ARGSUSED */
|
||
#pragma argsused
|
||
VOID cdecl Set_Uncomp_Buffer(int buffer_segment, unsigned int size_of_buffer)
|
||
{
|
||
|
||
if ((LZW_Table = buffer_segment) == NULL) {
|
||
/* ERROR HERE */
|
||
}
|
||
if ((LZW_Table_Size = size_of_buffer) == 0U) {
|
||
/* ERROR HERE */
|
||
}
|
||
}
|
||
#endif
|
||
|