author | Richard Taylor <richard.i.taylor@nokia.com> |
Mon, 29 Mar 2010 14:56:03 +0100 | |
branch | fix |
changeset 417 | ea9157619e03 |
parent 0 | 044383f39525 |
permissions | -rw-r--r-- |
0
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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|
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#include "byte_pair.h" |
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|
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|
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#undef ASSERT |
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#define ASSERT(c) if(!(c)) \ |
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{ \ |
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__BREAKPOINT() \ |
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} |
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|
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const TInt MaxBlockSize = 0x1000; |
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TUint16 PairCount[0x10000]; |
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TUint16 PairBuffer[MaxBlockSize*2]; |
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TUint16 GlobalPairs[0x10000] = {0}; |
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TUint16 GlobalTokenCounts[0x100] = {0}; |
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TUint16 ByteCount[0x100+4]; |
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void CountBytes(TUint8* data, TInt size) |
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{ |
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memset(ByteCount,0,sizeof(ByteCount)); |
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TUint8* dataEnd = data+size; |
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while(data<dataEnd) |
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++ByteCount[*data++]; |
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} |
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inline void ByteUsed(TInt b) |
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{ |
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ByteCount[b] = 0xffff; |
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} |
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// 11915620 |
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// 11913551 return -ByteCount[b1]-ByteCount[b2]; |
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// 11913185 |
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|
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#if 0 |
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int TieBreak(int b1,int b2) |
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{ |
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int i; |
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int x = 0; |
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for(i=0; i<0x100; i++) |
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x += PairCount[(b1<<8)+i]; |
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int y = 0; |
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for(i=b2; i<0x10000; i+=0x100) |
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y += PairCount[i]; |
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return -x-y; |
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} |
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#endif |
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int TieBreak(int b1,int b2) |
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{ |
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return -ByteCount[b1]-ByteCount[b2]; |
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} |
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TInt MostCommonPair(TInt& pair, TUint8* data, TInt size, TInt minFrequency, TInt marker) |
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{ |
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memset(PairCount,0,sizeof(PairCount)); |
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TUint8* dataEnd = data+size-1; |
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TInt pairsFound = 0; |
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TInt lastPair = -1; |
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while(data<dataEnd) |
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{ |
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TInt b1 = *data++; |
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if(b1==marker) |
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{ |
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// skip marker and following byte |
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lastPair = -1; |
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++data; |
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continue; |
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} |
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TInt b2 = *data; |
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if(b2==marker) |
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{ |
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// skip marker and following byte |
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lastPair = -1; |
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data+=2; |
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continue; |
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} |
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TInt p = (b2<<8)|b1; |
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if(p==lastPair) |
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{ |
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// ensure a pair of identical bytes don't get double counted |
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lastPair = -1; |
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continue; |
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} |
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lastPair = p; |
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++PairCount[p]; |
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if(PairCount[p]==minFrequency) |
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PairBuffer[pairsFound++] = (TUint16)p; |
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} |
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|
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TInt bestCount = -1; |
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TInt bestPair = -1; |
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TInt bestTieBreak = 0; |
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TInt p; |
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while(pairsFound--) |
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{ |
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p = PairBuffer[pairsFound]; |
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TInt f=PairCount[p]; |
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if(f>bestCount) |
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{ |
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bestCount = f; |
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bestPair = p; |
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bestTieBreak = TieBreak(p&0xff,p>>8); |
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} |
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else if(f==bestCount) |
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{ |
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TInt tieBreak = TieBreak(p&0xff,p>>8); |
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if(tieBreak>bestTieBreak) |
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{ |
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bestCount = f; |
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bestPair = p; |
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bestTieBreak = tieBreak; |
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} |
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133 |
} |
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134 |
} |
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135 |
pair = bestPair; |
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136 |
return bestCount; |
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137 |
} |
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|
138 |
|
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|
139 |
|
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140 |
TInt LeastCommonByte(TInt& byte) |
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141 |
{ |
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142 |
TInt bestCount = 0xffff; |
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143 |
TInt bestByte = -1; |
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144 |
for(TInt b=0; b<0x100; b++) |
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145 |
{ |
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146 |
TInt f = ByteCount[b]; |
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147 |
if(f<bestCount) |
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|
148 |
{ |
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149 |
bestCount = f; |
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150 |
bestByte = b; |
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|
151 |
} |
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152 |
} |
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153 |
byte = bestByte; |
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154 |
return bestCount; |
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|
155 |
} |
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|
156 |
|
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|
157 |
|
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|
158 |
TInt Pak(TUint8* dst, TUint8* src, TInt size) |
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159 |
{ |
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160 |
TInt originalSize = size; |
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161 |
TUint8* dst2 = dst+size*2; |
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162 |
TUint8* in = src; |
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163 |
TUint8* out = dst; |
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|
164 |
|
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165 |
TUint8 tokens[0x100*3]; |
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166 |
TInt tokenCount = 0; |
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|
167 |
|
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|
168 |
CountBytes(in,size); |
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|
169 |
|
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170 |
TInt marker = -1; |
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171 |
TInt overhead = 1+3+LeastCommonByte(marker); |
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172 |
ByteUsed(marker); |
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|
173 |
|
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|
174 |
TUint8* inEnd = in+size; |
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175 |
TUint8* outStart = out; |
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176 |
while(in<inEnd) |
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|
177 |
{ |
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|
178 |
TInt b=*in++; |
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|
179 |
if(b==marker) |
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180 |
*out++ = (TUint8)b; |
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181 |
*out++ = (TUint8)b; |
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|
182 |
} |
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|
183 |
size = out-outStart; |
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changeset
|
184 |
|
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|
185 |
TInt outToggle = 1; |
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|
186 |
in = dst; |
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|
187 |
out = dst2; |
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changeset
|
188 |
|
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|
189 |
for(TInt r=256; r>0; --r) |
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|
190 |
{ |
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|
191 |
TInt byte; |
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|
192 |
TInt byteCount = LeastCommonByte(byte); |
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|
193 |
TInt pair; |
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|
194 |
TInt pairCount = MostCommonPair(pair,in,size,overhead+1,marker); |
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|
195 |
TInt saving = pairCount-byteCount; |
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|
196 |
if(saving<=overhead) |
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|
197 |
break; |
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changeset
|
198 |
|
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|
199 |
overhead = 3; |
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|
200 |
if(tokenCount>=32) |
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|
201 |
overhead = 2; |
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changeset
|
202 |
|
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|
203 |
TUint8* d=tokens+3*tokenCount; |
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|
204 |
++tokenCount; |
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|
205 |
*d++ = (TUint8)byte; |
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|
206 |
ByteUsed(byte); |
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|
207 |
*d++ = (TUint8)pair; |
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|
208 |
ByteUsed(pair&0xff); |
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|
209 |
*d++ = (TUint8)(pair>>8); |
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|
210 |
ByteUsed(pair>>8); |
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|
211 |
++GlobalPairs[pair]; |
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changeset
|
212 |
|
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|
213 |
inEnd = in+size; |
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|
214 |
outStart = out; |
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changeset
|
215 |
while(in<inEnd) |
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changeset
|
216 |
{ |
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changeset
|
217 |
TInt b=*in++; |
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|
218 |
if(b==marker) |
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changeset
|
219 |
{ |
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|
220 |
*out++ = (TUint8)marker; |
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changeset
|
221 |
b = *in++; |
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changeset
|
222 |
} |
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changeset
|
223 |
else if(b==byte) |
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changeset
|
224 |
{ |
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changeset
|
225 |
*out++ = (TUint8)marker; |
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|
226 |
--byteCount; |
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|
227 |
} |
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changeset
|
228 |
else if(b==(pair&0xff) && in<inEnd && *in==(pair>>8)) |
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changeset
|
229 |
{ |
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|
230 |
++in; |
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diff
changeset
|
231 |
b = byte; |
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|
232 |
--pairCount; |
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changeset
|
233 |
} |
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changeset
|
234 |
*out++ = (TUint8)b; |
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|
235 |
} |
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|
236 |
ASSERT(!byteCount); |
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|
237 |
ASSERT(!pairCount); |
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|
238 |
size = out-outStart; |
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diff
changeset
|
239 |
|
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changeset
|
240 |
outToggle ^= 1; |
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parents:
diff
changeset
|
241 |
if(outToggle) |
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diff
changeset
|
242 |
{ |
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changeset
|
243 |
in = dst; |
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|
244 |
out = dst2; |
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changeset
|
245 |
} |
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changeset
|
246 |
else |
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changeset
|
247 |
{ |
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changeset
|
248 |
in = dst2; |
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|
249 |
out = dst; |
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changeset
|
250 |
} |
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diff
changeset
|
251 |
} |
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changeset
|
252 |
|
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changeset
|
253 |
// sort tokens with a bubble sort... |
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|
254 |
for(TInt x=0; x<tokenCount-1; x++) |
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|
255 |
for(TInt y=x+1; y<tokenCount; y++) |
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changeset
|
256 |
if(tokens[x*3]>tokens[y*3]) |
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changeset
|
257 |
{ |
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changeset
|
258 |
TInt z = tokens[x*3]; |
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|
259 |
tokens[x*3] = tokens[y*3]; |
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changeset
|
260 |
tokens[y*3] = (TUint8)z; |
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diff
changeset
|
261 |
z = tokens[x*3+1]; |
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changeset
|
262 |
tokens[x*3+1] = tokens[y*3+1]; |
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diff
changeset
|
263 |
tokens[y*3+1] = (TUint8)z; |
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diff
changeset
|
264 |
z = tokens[x*3+2]; |
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parents:
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changeset
|
265 |
tokens[x*3+2] = tokens[y*3+2]; |
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changeset
|
266 |
tokens[y*3+2] = (TUint8)z; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
267 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
268 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
269 |
// check for not being able to compress... |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
270 |
if(size>originalSize) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
271 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
272 |
*dst++ = 0; // store zero token count |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
273 |
memcpy(dst,src,originalSize); // store original data |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
274 |
return originalSize+1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
275 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
276 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
277 |
// make sure data is in second buffer (dst2) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
278 |
if(in!=dst2) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
279 |
memcpy(dst2,dst,size); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
280 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
281 |
// store tokens... |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
282 |
TUint8* originalDst = dst; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
283 |
*dst++ = (TUint8)tokenCount; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
284 |
if(tokenCount) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
285 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
286 |
*dst++ = (TUint8)marker; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
287 |
if(tokenCount<32) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
288 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
289 |
memcpy(dst,tokens,tokenCount*3); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
290 |
dst += tokenCount*3; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
291 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
292 |
else |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
293 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
294 |
TUint8* bitMask = dst; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
295 |
memset(bitMask,0,32); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
296 |
dst += 32; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
297 |
TUint8* d=tokens; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
298 |
do |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
299 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
300 |
TInt t=*d++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
301 |
bitMask[t>>3] |= (1<<(t&7)); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
302 |
*dst++ = *d++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
303 |
*dst++ = *d++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
304 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
305 |
while(--tokenCount); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
306 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
307 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
308 |
// store data... |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
309 |
memcpy(dst,dst2,size); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
310 |
dst += size; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
311 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
312 |
// get stats... |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
313 |
++GlobalTokenCounts[tokenCount]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
314 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
315 |
// return total size of compressed data... |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
316 |
return dst-originalDst; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
317 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
318 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
319 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
320 |
TInt Unpak(TUint8* dst, TInt dstSize, TUint8* src, TInt srcSize, TUint8*& srcNext) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
321 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
322 |
TUint8* dstStart = dst; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
323 |
TUint8* dstEnd = dst+dstSize; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
324 |
TUint8* srcEnd = src+srcSize; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
325 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
326 |
TUint32 LUT[0x100/2]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
327 |
TUint8* LUT0 = (TUint8*)LUT; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
328 |
TUint8* LUT1 = LUT0+0x100; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
329 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
330 |
TUint8 stack[0x100]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
331 |
TUint8* stackStart = stack+sizeof(stack); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
332 |
TUint8* sp = stackStart; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
333 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
334 |
TUint32 marker = ~0u; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
335 |
TInt numTokens; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
336 |
TUint32 p1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
337 |
TUint32 p2; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
338 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
339 |
TUint32* l = (TUint32*)LUT; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
340 |
TUint32 b = 0x03020100; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
341 |
TUint32 step = 0x04040404; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
342 |
do |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
343 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
344 |
*l++ = b; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
345 |
b += step; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
346 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
347 |
while(b>step); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
348 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
349 |
if(src>=srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
350 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
351 |
numTokens = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
352 |
if(numTokens) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
353 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
354 |
if(src>=srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
355 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
356 |
marker = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
357 |
LUT0[marker] = (TUint8)~marker; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
358 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
359 |
if(numTokens<32) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
360 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
361 |
TUint8* tokenEnd = src+3*numTokens; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
362 |
if(tokenEnd>srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
363 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
364 |
do |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
365 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
366 |
TInt b = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
367 |
TInt p1 = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
368 |
TInt p2 = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
369 |
LUT0[b] = (TUint8)p1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
370 |
LUT1[b] = (TUint8)p2; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
371 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
372 |
while(src<tokenEnd); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
373 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
374 |
else |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
375 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
376 |
TUint8* bitMask = src; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
377 |
src += 32; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
378 |
if(src>srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
379 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
380 |
TInt b=0; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
381 |
do |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
382 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
383 |
TUint8 mask = bitMask[b>>3]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
384 |
if(mask&(1<<(b&7))) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
385 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
386 |
if(src>srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
387 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
388 |
TInt p1 = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
389 |
if(src>srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
390 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
391 |
TInt p2 = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
392 |
LUT0[b] = (TUint8)p1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
393 |
LUT1[b] = (TUint8)p2; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
394 |
--numTokens; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
395 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
396 |
++b; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
397 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
398 |
while(b<0x100); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
399 |
if(numTokens) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
400 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
401 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
402 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
403 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
404 |
if(src>=srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
405 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
406 |
b = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
407 |
if(dst>=dstEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
408 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
409 |
p1 = LUT0[b]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
410 |
if(p1!=b) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
411 |
goto not_single; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
412 |
next: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
413 |
if(src>=srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
414 |
goto done_s; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
415 |
b = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
416 |
*dst++ = (TUint8)p1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
417 |
if(dst>=dstEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
418 |
goto done_d; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
419 |
p1 = LUT0[b]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
420 |
if(p1==b) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
421 |
goto next; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
422 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
423 |
not_single: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
424 |
if(b==marker) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
425 |
goto do_marker; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
426 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
427 |
do_pair: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
428 |
p2 = LUT1[b]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
429 |
b = p1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
430 |
p1 = LUT0[b]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
431 |
if(sp<=stack) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
432 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
433 |
*--sp = (TUint8)p2; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
434 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
435 |
recurse: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
436 |
if(b!=p1) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
437 |
goto do_pair; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
438 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
439 |
if(sp==stackStart) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
440 |
goto next; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
441 |
b = *sp++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
442 |
if(dst>=dstEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
443 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
444 |
*dst++ = (TUint8)p1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
445 |
p1 = LUT0[b]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
446 |
goto recurse; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
447 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
448 |
do_marker: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
449 |
if(src>=srcEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
450 |
goto error; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
451 |
p1 = *src++; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
452 |
goto next; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
453 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
454 |
error: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
455 |
srcNext = 0; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
456 |
return KErrCorrupt; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
457 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
458 |
done_s: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
459 |
*dst++ = (TUint8)p1; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
460 |
srcNext = src; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
461 |
return dst-dstStart; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
462 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
463 |
done_d: |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
464 |
if(dst>=dstEnd) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
465 |
--src; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
466 |
srcNext = src; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
467 |
return dst-dstStart; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
468 |
} |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
469 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
470 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
471 |
TUint8 PakBuffer[MaxBlockSize*4]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
472 |
TUint8 UnpakBuffer[MaxBlockSize]; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
473 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
474 |
|
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
475 |
TInt BytePairCompress(TUint8* dst, TUint8* src, TInt size) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
476 |
{ |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
477 |
ASSERT(size<=MaxBlockSize); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
478 |
TInt compressedSize = Pak(PakBuffer,src,size); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
479 |
TUint8* pakEnd; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
480 |
TInt us = Unpak(UnpakBuffer,MaxBlockSize,PakBuffer,compressedSize,pakEnd); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
481 |
ASSERT(us==size) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
482 |
ASSERT(pakEnd==PakBuffer+compressedSize) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
483 |
ASSERT(!memcmp(src,UnpakBuffer,size)) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
484 |
if(compressedSize>=size) |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
485 |
return KErrTooBig; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
486 |
memcpy(dst,PakBuffer,compressedSize); |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
487 |
return compressedSize; |
044383f39525
Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
488 |
} |