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1 // Archive/LzhItem.h
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2
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3 #ifndef __ARCHIVE_LZH_ITEM_H
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4 #define __ARCHIVE_LZH_ITEM_H
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5
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6 #include "Common/Types.h"
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7 #include "Common/MyString.h"
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8 #include "Common/Buffer.h"
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9 #include "LzhHeader.h"
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10
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11 namespace NArchive {
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12 namespace NLzh {
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13
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14 struct CExtension
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15 {
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16 Byte Type;
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17 CByteBuffer Data;
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18 AString GetString() const
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19 {
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20 AString s;
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21 for (size_t i = 0; i < Data.GetCapacity(); i++)
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22 {
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23 char c = (char)Data[i];
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24 if (c == 0)
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25 break;
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26 s += c;
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27 }
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28 return s;
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29 }
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30 };
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31
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32 struct CItem
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33 {
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34 public:
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35 AString Name;
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36 Byte Method[kMethodIdSize];
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37 UInt32 PackSize;
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38 UInt32 Size;
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39 UInt32 ModifiedTime;
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40 Byte Attributes;
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41 Byte Level;
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42 UInt16 CRC;
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43 Byte OsId;
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44 CObjectVector<CExtension> Extensions;
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45
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46 bool IsValidMethod() const { return (Method[0] == '-' && Method[1] == 'l' && Method[4] == '-'); }
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47 bool IsLhMethod() const {return (IsValidMethod() && Method[2] == 'h'); }
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48 bool IsDir() const {return (IsLhMethod() && Method[3] == 'd'); }
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49
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50 bool IsCopyMethod() const
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51 {
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52 return (IsLhMethod() && Method[3] == '0') ||
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53 (IsValidMethod() && Method[2] == 'z' && Method[3] == '4');
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54 }
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55
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56 bool IsLh1GroupMethod() const
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57 {
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58 if (!IsLhMethod())
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59 return false;
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60 switch(Method[3])
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61 {
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62 case '1':
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63 return true;
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64 }
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65 return false;
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66 }
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67
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68 bool IsLh4GroupMethod() const
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69 {
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70 if (!IsLhMethod())
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71 return false;
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72 switch(Method[3])
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73 {
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74 case '4':
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75 case '5':
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76 case '6':
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77 case '7':
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78 return true;
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79 }
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80 return false;
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81 }
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82
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83 int GetNumDictBits() const
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84 {
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85 if (!IsLhMethod())
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86 return 0;
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87 switch(Method[3])
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88 {
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89 case '1':
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90 return 12;
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91 case '2':
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92 return 13;
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93 case '3':
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94 return 13;
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95 case '4':
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96 return 12;
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97 case '5':
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98 return 13;
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99 case '6':
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100 return 15;
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101 case '7':
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102 return 16;
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103 }
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104 return 0;
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105 }
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106
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107 int FindExt(Byte type) const
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108 {
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109 for (int i = 0; i < Extensions.Size(); i++)
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110 if (Extensions[i].Type == type)
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111 return i;
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112 return -1;
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113 }
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114 bool GetUnixTime(UInt32 &value) const
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115 {
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116 int index = FindExt(kExtIdUnixTime);
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117 if (index < 0)
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118 {
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119 if (Level == 2)
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120 {
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121 value = ModifiedTime;
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122 return true;
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123 }
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124 return false;
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125 }
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126 const Byte *data = (const Byte *)(Extensions[index].Data);
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127 value = data[0] |
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128 ((UInt32)data[1] << 8) |
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129 ((UInt32)data[2] << 16) |
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130 ((UInt32)data[3] << 24);
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131 return true;
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132 }
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133
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134 AString GetDirName() const
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135 {
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136 int index = FindExt(kExtIdDirName);
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137 if (index < 0)
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138 return AString();
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139 return Extensions[index].GetString();
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140 }
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141
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142 AString GetFileName() const
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143 {
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144 int index = FindExt(kExtIdFileName);
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145 if (index < 0)
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146 return Name;
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147 return Extensions[index].GetString();
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148 }
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149
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150 AString GetName() const
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151 {
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152 AString dirName = GetDirName();
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153 dirName.Replace((char)(unsigned char)0xFF, '\\');
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154 if (!dirName.IsEmpty())
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155 {
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156 char c = dirName[dirName.Length() - 1];
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157 if (c != '\\')
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158 dirName += '\\';
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159 }
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160 return dirName + GetFileName();
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161 }
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162 };
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163
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164 class CItemEx: public CItem
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165 {
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166 public:
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167 UInt64 DataPosition;
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168 };
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169
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170 }}
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171
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172 #endif
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