563103b890
git-svn-id: https://clonekeenplus.svn.sourceforge.net/svnroot/clonekeenplus/cgenius/trunk@5 4df4b0f3-56ce-47cb-b001-ed939b7d65a6
77 lines
1.2 KiB
C++
77 lines
1.2 KiB
C++
/*
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* rle.c
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*
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* Created on: 29.01.2009
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* Author: gerstrong
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*/
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#include <stdio.h>
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#include "../funcdefs.h"
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int unRLEW(FILE *fp, unsigned int *filebuf)
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{
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int t,i, howmany, cursize, finsize;
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/*
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1.) If implemented, get the first dword in the file, [Final Length]
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2.) If [Length of data so far] < [Final Length] then:
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3.) Get a word
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2.) Is this word $FEFE?
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-> If yes;
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Get the next two words (Word1 and Word2)
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Copy Word1 [Word2] times
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Move forward three words and got to 2.)
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-> If no;
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Copy the word
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Move forward a word and go to 2.)
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*/
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cursize = 0;
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rewind(fp);
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while(!feof(fp)) // Detect, if the file is really RLEW compressed!
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{
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t = fgeti(fp);
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if(t == 0xFEFE)
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{
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cursize = 1;
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break;
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}
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}
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if(cursize == 0)
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{
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return -1; // This file is not RLEW compressed!
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}
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rewind(fp);
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finsize = fgeti(fp);
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while( cursize < finsize )
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{
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t = fgeti(fp);
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if (t == 0xFEFE)
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{
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howmany = fgeti(fp);
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t = fgeti(fp);
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for(i=0;i<howmany;i++)
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{
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filebuf[cursize] = t;
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cursize++;
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}
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}
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else
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{
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filebuf[cursize] = t;
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cursize++;
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}
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}
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return cursize;
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}
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