112 lines
5.3 KiB
C++
112 lines
5.3 KiB
C++
/*
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** Command & Conquer Renegade(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/***********************************************************************************************
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*** 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 ***
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***********************************************************************************************
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* *
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* Project Name : Command & Conquer *
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* *
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* $Archive:: /Commando/Library/LOAD.CPP $*
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* *
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* $Author:: Greg_h $*
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* *
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* $Modtime:: 7/22/97 11:37a $*
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* *
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* $Revision:: 1 $*
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* *
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*---------------------------------------------------------------------------------------------*
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* Functions: *
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* Load_Uncompress -- Load and uncompress the given file. *
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* Uncompress_Data -- Uncompress standard CPS buffer. *
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* Load_Data -- Loads a data file from disk. *
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* Load_Alloc_Data -- Loads and allocates buffer for a file. *
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* Write_Data -- Writes a block of data as a file to disk. *
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* Uncompress_Data -- Uncompresses data from one buffer to another. *
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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#include "always.h"
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#include "iff.h"
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#include "lcw.h"
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#include <string.h>
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/***************************************************************************
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* Uncompress_Data -- Uncompresses data from one buffer to another. *
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* *
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* This routine takes data from a compressed file (sans the first two *
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* size bytes) and uncompresses it to a destination buffer. The source *
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* data MUST have the CompHeaderType at its start. *
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* *
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* INPUT: src -- Source compressed data pointer. *
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* *
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* dst -- Destination (paragraph aligned) pointer. *
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* *
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* OUTPUT: Returns with the size of the uncompressed data. *
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* *
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* WARNINGS: If LCW compression is used, the destination buffer must *
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* be paragraph aligned. *
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* *
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* HISTORY: *
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* 09/17/1993 JLB : Created. *
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*=========================================================================*/
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unsigned long __cdecl Uncompress_Data(void const *src, void *dst)
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{
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unsigned int skip; // Number of leading data to skip.
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CompressionType method; // Compression method used.
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unsigned long uncomp_size;
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if (!src || !dst) return(NULL);
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/*
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** Interpret the data block header structure to determine
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** compression method, size, and skip data amount.
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*/
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uncomp_size = ((CompHeaderType*)src)->Size;
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#if(AMIGA)
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uncomp_size = Reverse_Long(uncomp_size);
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#endif
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skip = ((CompHeaderType*)src)->Skip;
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#if(AMIGA)
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skip = Reverse_Word(skip);
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#endif
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method = (CompressionType) ((CompHeaderType*)src)->Method;
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src = ((char*)src) + (long)sizeof(CompHeaderType) + (long)skip;
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// src = Add_Long_To_Pointer((void *)src, (long)sizeof(CompHeaderType) + (long)skip);
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switch (method) {
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default:
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case NOCOMPRESS:
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memmove(dst, (void *) src, uncomp_size);
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// Mem_Copy((void *) src, dst, uncomp_size);
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break;
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case HORIZONTAL:
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break;
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case LCW:
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LCW_Uncomp((void *) src, (void *) dst, (unsigned long) uncomp_size);
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break;
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}
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return(uncomp_size);
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}
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