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16775 | fschmid | 1 | /* |
2 | * The Progressive Graphics File; http://www.libpgf.org |
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3 | * |
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4 | * $Date: 2007-01-19 11:51:24 +0100 (Fr, 19 Jan 2007) $ |
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5 | * $Revision: 268 $ |
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6 | * |
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7 | * This file Copyright (C) 2006 xeraina GmbH, Switzerland |
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8 | * |
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9 | * This program is free software; you can redistribute it and/or |
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10 | * modify it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE |
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11 | * as published by the Free Software Foundation; either version 2.1 |
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12 | * of the License, or (at your option) any later version. |
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13 | * |
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14 | * This program is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this program; if not, write to the Free Software |
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18122 | mrdocs | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
16775 | fschmid | 22 | */ |
23 | |||
24 | ////////////////////////////////////////////////////////////////////// |
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25 | /// @file PGFstream.cpp |
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26 | /// @brief PGF stream class implementation |
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27 | /// @author C. Stamm |
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28 | |||
29 | #include "PGFstream.h" |
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30 | |||
31 | #ifdef WIN32 |
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32 | #include <malloc.h> |
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33 | #endif |
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34 | |||
35 | ////////////////////////////////////////////////////////////////////// |
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36 | // CPGFFileStream |
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37 | ////////////////////////////////////////////////////////////////////// |
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38 | void CPGFFileStream::Write(int *count, void *buffPtr) THROW_ { |
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39 | ASSERT(count); |
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40 | ASSERT(buffPtr); |
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41 | ASSERT(IsValid()); |
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42 | OSError err; |
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43 | if ((err = FileWrite(m_hFile, count, buffPtr)) != NoError) ReturnWithError(err); |
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44 | |||
45 | } |
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46 | |||
47 | ////////////////////////////////////////////////////////////////////// |
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48 | void CPGFFileStream::Read(int *count, void *buffPtr) THROW_ { |
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49 | ASSERT(count); |
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50 | ASSERT(buffPtr); |
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51 | ASSERT(IsValid()); |
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52 | OSError err; |
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53 | if ((err = FileRead(m_hFile, count, buffPtr)) != NoError) ReturnWithError(err); |
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54 | } |
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55 | |||
56 | ////////////////////////////////////////////////////////////////////// |
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57 | void CPGFFileStream::SetPos(short posMode, INT64 posOff) THROW_ { |
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58 | ASSERT(IsValid()); |
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59 | OSError err; |
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60 | if ((err = SetFPos(m_hFile, posMode, posOff)) != NoError) ReturnWithError(err); |
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61 | } |
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62 | |||
63 | ////////////////////////////////////////////////////////////////////// |
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64 | UINT64 CPGFFileStream::GetPos() const THROW_ { |
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65 | ASSERT(IsValid()); |
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66 | OSError err; |
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67 | UINT64 pos; |
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68 | if ((err = GetFPos(m_hFile, &pos)) != NoError) ReturnWithError2(err, pos); |
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69 | return pos; |
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70 | } |
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71 | |||
72 | |||
73 | ////////////////////////////////////////////////////////////////////// |
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74 | // CPGFMemoryStream |
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75 | ////////////////////////////////////////////////////////////////////// |
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76 | /// Allocate memory block of given size |
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77 | /// @param size Memory size |
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78 | CPGFMemoryStream::CPGFMemoryStream(size_t size) THROW_ |
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79 | : m_size(size) |
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80 | , m_allocated(true) { |
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81 | m_buffer = m_pos = new UINT8[m_size]; |
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82 | if (!m_buffer) ReturnWithError(InsufficientMemory); |
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83 | } |
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84 | |||
85 | ////////////////////////////////////////////////////////////////////// |
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86 | /// Use already allocated memory of given size |
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87 | /// @param pBuffer Memory location |
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88 | /// @param size Memory size |
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89 | CPGFMemoryStream::CPGFMemoryStream(UINT8 *pBuffer, size_t size) THROW_ |
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90 | : m_buffer(pBuffer) |
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91 | , m_pos(pBuffer) |
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92 | , m_size(size) |
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93 | , m_allocated(false) { |
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94 | ASSERT(IsValid()); |
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95 | } |
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96 | |||
97 | ////////////////////////////////////////////////////////////////////// |
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98 | /// Use already allocated memory of given size |
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99 | /// @param pBuffer Memory location |
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100 | /// @param size Memory size |
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101 | void CPGFMemoryStream::Reinitialize(UINT8 *pBuffer, size_t size) THROW_ { |
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102 | if (!m_allocated) { |
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103 | m_buffer = pBuffer; |
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104 | m_pos = pBuffer; |
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105 | m_size = size; |
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106 | } |
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107 | } |
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108 | |||
109 | ////////////////////////////////////////////////////////////////////// |
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110 | void CPGFMemoryStream::Write(int *count, void *buffPtr) THROW_ { |
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111 | ASSERT(count); |
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112 | ASSERT(buffPtr); |
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113 | ASSERT(IsValid()); |
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114 | const size_t deltaSize = 0x4000 + *count; |
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115 | |||
116 | if (m_pos + *count <= m_buffer + m_size) { |
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117 | memcpy(m_pos, buffPtr, *count); |
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118 | m_pos += *count; |
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119 | } else if (m_allocated) { |
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120 | // memory block is too small -> reallocate a deltaSize larger block |
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121 | size_t offset = m_pos - m_buffer; |
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122 | UINT8 *buf_tmp = (UINT8 *)realloc(m_buffer, m_size + deltaSize); |
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123 | if (!buf_tmp) { |
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124 | delete[] m_buffer; |
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125 | m_buffer = 0; |
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126 | ReturnWithError(InsufficientMemory); |
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127 | } else { |
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128 | m_buffer = buf_tmp; |
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129 | } |
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130 | m_size += deltaSize; |
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131 | |||
132 | // reposition m_pos |
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133 | m_pos = m_buffer + offset; |
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134 | |||
135 | // write block |
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136 | memcpy(m_pos, buffPtr, *count); |
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137 | m_pos += *count; |
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138 | } else { |
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139 | ReturnWithError(InsufficientMemory); |
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140 | } |
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141 | } |
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142 | |||
143 | ////////////////////////////////////////////////////////////////////// |
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144 | void CPGFMemoryStream::Read(int *count, void *buffPtr) THROW_ { |
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145 | ASSERT(count); |
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146 | ASSERT(buffPtr); |
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147 | ASSERT(IsValid()); |
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148 | |||
149 | if (m_pos + *count <= m_buffer + m_size) { |
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150 | memcpy(buffPtr, m_pos, *count); |
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151 | m_pos += *count; |
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152 | } else { |
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153 | // end of memory block reached -> read only until end |
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154 | *count = (int)(m_buffer + m_size - m_pos); |
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155 | memcpy(buffPtr, m_pos, *count); |
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156 | m_pos += *count; |
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157 | ReturnWithError(EndOfMemory); |
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158 | } |
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159 | } |
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160 | |||
161 | ////////////////////////////////////////////////////////////////////// |
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162 | void CPGFMemoryStream::SetPos(short posMode, INT64 posOff) THROW_ { |
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163 | ASSERT(IsValid()); |
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164 | switch(posMode) { |
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165 | case FSFromStart: |
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166 | m_pos = m_buffer + posOff; |
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167 | break; |
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168 | case FSFromCurrent: |
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169 | m_pos += posOff; |
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170 | break; |
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171 | case FSFromEnd: |
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172 | m_pos = m_buffer + m_size + posOff; |
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173 | break; |
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174 | default: |
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175 | ASSERT(false); |
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176 | } |
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177 | } |
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178 | |||
179 | ////////////////////////////////////////////////////////////////////// |
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180 | UINT64 CPGFMemoryStream::GetPos() const THROW_ { |
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181 | ASSERT(IsValid()); |
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182 | return m_pos - m_buffer; |
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183 | } |
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184 | |||
185 | |||
186 | ////////////////////////////////////////////////////////////////////// |
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187 | // CPGFMemFileStream |
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188 | #ifdef _MFC_VER |
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189 | ////////////////////////////////////////////////////////////////////// |
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190 | void CPGFMemFileStream::Write(int *count, void *buffPtr) THROW_ { |
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191 | ASSERT(count); |
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192 | ASSERT(buffPtr); |
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193 | ASSERT(IsValid()); |
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194 | m_memFile->Write(buffPtr, *count); |
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195 | } |
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196 | |||
197 | ////////////////////////////////////////////////////////////////////// |
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198 | void CPGFMemFileStream::Read(int *count, void *buffPtr) THROW_ { |
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199 | ASSERT(count); |
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200 | ASSERT(buffPtr); |
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201 | ASSERT(IsValid()); |
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202 | m_memFile->Read(buffPtr, *count); |
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203 | } |
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204 | |||
205 | ////////////////////////////////////////////////////////////////////// |
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206 | void CPGFMemFileStream::SetPos(short posMode, INT64 posOff) THROW_ { |
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207 | ASSERT(IsValid()); |
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208 | m_memFile->Seek(posOff, posMode); |
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209 | } |
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210 | |||
211 | ////////////////////////////////////////////////////////////////////// |
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212 | UINT64 CPGFMemFileStream::GetPos() const THROW_ { |
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213 | return (UINT64)m_memFile->GetPosition(); |
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214 | } |
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215 | #endif // _MFC_VER |
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216 | |||
217 | ////////////////////////////////////////////////////////////////////// |
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218 | // CPGFIStream |
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219 | #if defined(WIN32) || defined(WINCE) |
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220 | ////////////////////////////////////////////////////////////////////// |
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221 | void CPGFIStream::Write(int *count, void *buffPtr) THROW_ { |
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222 | ASSERT(count); |
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223 | ASSERT(buffPtr); |
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224 | ASSERT(IsValid()); |
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225 | |||
226 | HRESULT hr = m_stream->Write(buffPtr, *count, (ULONG *)count); |
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227 | if (FAILED(hr)) { |
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228 | ReturnWithError(hr); |
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229 | } |
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230 | } |
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231 | |||
232 | ////////////////////////////////////////////////////////////////////// |
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233 | void CPGFIStream::Read(int *count, void *buffPtr) THROW_ { |
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234 | ASSERT(count); |
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235 | ASSERT(buffPtr); |
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236 | ASSERT(IsValid()); |
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237 | |||
238 | HRESULT hr = m_stream->Read(buffPtr, *count, (ULONG *)count); |
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239 | if (FAILED(hr)) { |
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240 | ReturnWithError(hr); |
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241 | } |
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242 | } |
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243 | |||
244 | ////////////////////////////////////////////////////////////////////// |
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245 | void CPGFIStream::SetPos(short posMode, INT64 posOff) THROW_ { |
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246 | ASSERT(IsValid()); |
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247 | |||
248 | LARGE_INTEGER li; |
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249 | li.QuadPart = posOff; |
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250 | |||
251 | HRESULT hr = m_stream->Seek(li, posMode, NULL); |
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252 | if (FAILED(hr)) { |
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253 | ReturnWithError(hr); |
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254 | } |
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255 | } |
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256 | |||
257 | ////////////////////////////////////////////////////////////////////// |
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258 | UINT64 CPGFIStream::GetPos() const THROW_ { |
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259 | ASSERT(IsValid()); |
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260 | |||
261 | LARGE_INTEGER n; |
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262 | ULARGE_INTEGER pos; |
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263 | n.QuadPart = 0; |
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264 | |||
265 | HRESULT hr = m_stream->Seek(n, FSFromCurrent, &pos); |
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266 | if (SUCCEEDED(hr)) { |
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267 | return pos.QuadPart; |
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268 | } else { |
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269 | ReturnWithError2(hr, pos.QuadPart); |
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270 | } |
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271 | } |
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272 | #endif // WIN32 || WINCE |