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1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // e32tools\petran\Szip\compress.cpp |
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15 // |
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16 // |
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17 |
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18 #include "deflate.h" |
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19 |
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20 #if defined(__MSVCDOTNET__) || defined(__TOOLS2__) |
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21 #include <fstream> |
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22 #else //__MSVCDOTNET__ |
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23 #include <fstream.h> |
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24 #endif //__MSVCDOTNET__ |
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25 |
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26 #include <assert.h> |
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27 #include "h_utl.h" |
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28 |
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29 class TFileOutput : public TBitOutput |
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30 { |
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31 enum {KBufSize=0x1000}; |
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32 public: |
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33 TFileOutput(ostream& os); |
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34 void FlushL(); |
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35 TUint32 iDataCount; |
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36 private: |
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37 void OverflowL(); |
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38 private: |
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39 ostream& iOutStream; |
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40 TUint8 iBuf[KBufSize]; |
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41 }; |
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42 |
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43 TFileOutput::TFileOutput(ostream& os) |
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44 :iOutStream(os) |
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45 { |
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46 Set(iBuf,KBufSize); |
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47 } |
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48 |
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49 void TFileOutput::OverflowL() |
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50 // |
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51 // empty the buffer and reset the pointers |
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52 // |
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53 { |
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54 FlushL(); |
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55 Set(iBuf,KBufSize); |
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56 } |
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57 |
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58 void TFileOutput::FlushL() |
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59 // |
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60 // write out the contents of the buffer |
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61 // |
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62 { |
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63 TInt len=Ptr()-iBuf; |
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64 if (len) |
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65 { |
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66 iOutStream.write(reinterpret_cast<char *>(iBuf), len); // write extended header |
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67 iDataCount += len; |
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68 } |
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69 } |
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70 |
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71 void DeflateCompress(char *bytes,TInt size,ostream &os) |
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72 { |
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73 TFileOutput* output=new TFileOutput(os); |
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74 output->iDataCount = 0; |
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75 DeflateL((TUint8*)bytes,size,*output); |
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76 output->FlushL(); |
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77 delete output; |
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78 } |
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79 |
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80 TUint32 DeflateCompressCheck(char *bytes,TInt size,ostream &os) |
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81 { |
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82 TUint32 r = 0; |
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83 TFileOutput* output=new TFileOutput(os); |
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84 output->iDataCount = 0; |
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85 DeflateL((TUint8*)bytes,size,*output); |
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86 output->FlushL(); |
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87 |
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88 r = output->iDataCount; // Preserve the compressed count |
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89 delete output; |
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90 return r; // Return the compressed size |
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91 } |
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92 |
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93 class TFileInput : public TBitInput |
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94 { |
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95 public: |
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96 TFileInput(unsigned char* source,int size); |
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97 |
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98 private: |
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99 void UnderflowL(); |
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100 private: |
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101 TUint8* iReadBuf; |
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102 TInt iSize; |
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103 }; |
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104 |
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105 TFileInput::TFileInput(unsigned char* source,int size) |
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106 :iReadBuf(source),iSize(size) |
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107 { |
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108 Set(source,iSize*8); |
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109 } |
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110 |
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111 |
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112 void TFileInput::UnderflowL() |
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113 { |
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114 Print(ESevereError,"Buffer underflow on deflate\n"); |
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115 } |
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116 |
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117 void InflateUnCompress(unsigned char* source, int sourcesize,unsigned char* dest, int destsize) |
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118 { |
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119 TFileInput* input = new TFileInput(source, sourcesize); |
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120 CInflater* inflater=CInflater::NewLC(*input); |
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121 inflater->ReadL(dest,destsize); |
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122 delete input; |
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123 //delete inflater; |
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124 } |
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125 |
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126 |