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Initial commit of Command & Conquer Renegade source code.

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LFeenanEA
2025-02-27 16:39:46 +00:00
parent 74ab8fa5e0
commit 58ed459113
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Code/wwlib/load.cpp Normal file
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/*
** Command & Conquer Renegade(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 S T U D I O S ***
***********************************************************************************************
* *
* Project Name : Command & Conquer *
* *
* $Archive:: /Commando/Library/LOAD.CPP $*
* *
* $Author:: Greg_h $*
* *
* $Modtime:: 7/22/97 11:37a $*
* *
* $Revision:: 1 $*
* *
*---------------------------------------------------------------------------------------------*
* 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 "always.h"
#include "iff.h"
#include "lcw.h"
#include <string.h>
/***************************************************************************
* 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;
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 = ((char*)src) + (long)sizeof(CompHeaderType) + (long)skip;
// src = Add_Long_To_Pointer((void *)src, (long)sizeof(CompHeaderType) + (long)skip);
switch (method) {
default:
case NOCOMPRESS:
memmove(dst, (void *) src, uncomp_size);
// Mem_Copy((void *) src, dst, uncomp_size);
break;
case HORIZONTAL:
break;
case LCW:
LCW_Uncomp((void *) src, (void *) dst, (unsigned long) uncomp_size);
break;
}
return(uncomp_size);
}