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annotate deps/Platinum/ThirdParty/Neptune/Source/System/PSP/NptPSPFile.cpp @ 0:3425707ddbf6

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author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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1 /*****************************************************************
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2 |
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3 | Neptune - File Byte Stream :: Standard C Implementation
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4 |
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5 | (c) 2001-2003 Gilles Boccon-Gibod
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6 | Author: Gilles Boccon-Gibod (bok@bok.net)
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7 |
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8 ****************************************************************/
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9
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10 /*----------------------------------------------------------------------
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11 | includes
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12 +---------------------------------------------------------------------*/
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13 #include <stdio.h>
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14 #include <string.h>
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15 #include <malloc.h>
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16
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17 #include <kernel.h>
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18 #include <psptypes.h>
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19 #include <psperror.h>
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20 #include <mediaman.h>
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21 #include <umderror.h>
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22 #include <fatms.h>
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23
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24 #include "NptFile.h"
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25
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26 /*----------------------------------------------------------------------
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27 | NPT_PSPFileWrapper
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28 +---------------------------------------------------------------------*/
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29 class NPT_PSPFileWrapper
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30 {
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31 public:
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32 // constructors and destructor
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33 NPT_PSPFileWrapper(SceUID file) : m_File(file) {}
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34 ~NPT_PSPFileWrapper() {
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35 if (m_File >= 0) {
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36 sceIoClose(m_File);
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37 }
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38 }
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39
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40 // methods
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41 SceUID GetFile() { return m_File; }
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42
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43 private:
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44 // members
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45 SceUID m_File;
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46 };
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47
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48 typedef NPT_Reference<NPT_PSPFileWrapper> NPT_PSPFileReference;
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49
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50 /*----------------------------------------------------------------------
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51 | NPT_PSPFileStream
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52 +---------------------------------------------------------------------*/
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53 class NPT_PSPFileStream
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54 {
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55 public:
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56 // constructors and destructor
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57 NPT_PSPFileStream(NPT_PSPFileReference file) :
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58 m_FileReference(file), m_Position(0) {}
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59
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60 // NPT_FileInterface methods
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61 NPT_Result Seek(NPT_Offset offset);
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62 NPT_Result Tell(NPT_Offset& offset);
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63
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64 protected:
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65 // constructors and destructors
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66 virtual ~NPT_PSPFileStream() {}
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67
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68 // members
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69 NPT_PSPFileReference m_FileReference;
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70 SceOff m_Position;
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71 };
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72
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73 /*----------------------------------------------------------------------
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74 | NPT_PSPFileStream::Seek
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75 +---------------------------------------------------------------------*/
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76 NPT_Result
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77 NPT_PSPFileStream::Seek(NPT_Offset offset)
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78 {
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79 SceOff result;
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80
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81 result = sceIoLseek(m_FileReference->GetFile(), offset, SEEK_SET);
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82 if (result >= 0) {
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83 m_Position = offset;
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84 return NPT_SUCCESS;
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85 } else {
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86 return NPT_FAILURE;
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87 }
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88 }
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89
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90 /*----------------------------------------------------------------------
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91 | NPT_PSPFileStream::Tell
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92 +---------------------------------------------------------------------*/
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93 NPT_Result
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94 NPT_PSPFileStream::Tell(NPT_Offset& offset)
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95 {
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96 offset = m_Position;
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97 return NPT_SUCCESS;
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98 }
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99
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100 /*----------------------------------------------------------------------
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101 | NPT_PSPFileInputStream
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102 +---------------------------------------------------------------------*/
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103 class NPT_PSPFileInputStream : public NPT_InputStream,
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104 private NPT_PSPFileStream
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105
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106 {
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107 public:
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108 // constructors and destructor
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109 NPT_PSPFileInputStream(NPT_PSPFileReference& file, NPT_Size size) :
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110 NPT_PSPFileStream(file), m_Size(size) {}
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111
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112 // NPT_InputStream methods
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113 NPT_Result Read(void* buffer,
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114 NPT_Size bytes_to_read,
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115 NPT_Size* bytes_read);
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116 NPT_Result Seek(NPT_Offset offset) {
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117 return NPT_PSPFileStream::Seek(offset);
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118 }
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119 NPT_Result Tell(NPT_Offset& offset) {
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120 return NPT_PSPFileStream::Tell(offset);
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121 }
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122 NPT_Result GetSize(NPT_Size& size);
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123 NPT_Result GetAvailable(NPT_Size& available);
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124
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125 private:
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126 // members
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127 NPT_Size m_Size;
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128 };
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129
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130 /*----------------------------------------------------------------------
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131 | NPT_PSPFileInputStream::Read
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132 +---------------------------------------------------------------------*/
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133 NPT_Result
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134 NPT_PSPFileInputStream::Read(void* buffer,
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135 NPT_Size bytes_to_read,
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136 NPT_Size* bytes_read)
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137 {
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138 size_t nb_read;
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139
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140 if (buffer == NULL) {
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141 return NPT_ERROR_INVALID_PARAMETERS;
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142 }
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143
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144 nb_read = sceIoRead(m_FileReference->GetFile(), (SceChar8*)buffer, bytes_to_read);
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145
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146 if (nb_read > 0) {
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147 if (bytes_read) *bytes_read = (NPT_Size)nb_read;
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148 m_Position += nb_read;
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149 return NPT_SUCCESS;
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150 } else {
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151 if (bytes_read) *bytes_read = 0;
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152 return NPT_ERROR_EOS;
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153 }
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154 }
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155
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156 /*----------------------------------------------------------------------
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157 | NPT_PSPFileInputStream::GetSize
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158 +---------------------------------------------------------------------*/
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159 NPT_Result
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160 NPT_PSPFileInputStream::GetSize(NPT_Size& size)
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161 {
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162 size = m_Size;
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163 return NPT_SUCCESS;
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164 }
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165
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166 /*----------------------------------------------------------------------
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167 | NPT_PSPFileInputStream::GetAvailable
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168 +---------------------------------------------------------------------*/
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169 NPT_Result
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170 NPT_PSPFileInputStream::GetAvailable(NPT_Size& available)
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171 {
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172 long offset = m_Position;
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173 if (offset >= 0 && (NPT_Size)offset <= m_Size) {
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174 available = m_Size = offset;
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175 return NPT_SUCCESS;
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176 } else {
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177 available = 0;
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178 return NPT_FAILURE;
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179 }
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180 }
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181
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182 /*----------------------------------------------------------------------
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183 | NPT_PSPFileOutputStream
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184 +---------------------------------------------------------------------*/
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185 class NPT_PSPFileOutputStream : public NPT_OutputStream,
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186 private NPT_PSPFileStream
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187 {
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188 public:
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189 // constructors and destructor
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190 NPT_PSPFileOutputStream(NPT_PSPFileReference& file) :
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191 NPT_PSPFileStream(file) {}
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192
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193 // NPT_InputStream methods
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194 NPT_Result Write(const void* buffer,
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195 NPT_Size bytes_to_write,
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196 NPT_Size* bytes_written);
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197 NPT_Result Seek(NPT_Offset offset) {
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198 return NPT_PSPFileStream::Seek(offset);
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199 }
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200 NPT_Result Tell(NPT_Offset& offset) {
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201 return NPT_PSPFileStream::Tell(offset);
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202 }
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203 };
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204
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205 /*----------------------------------------------------------------------
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206 | NPT_PSPFileOutputStream::Write
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207 +---------------------------------------------------------------------*/
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208 NPT_Result
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209 NPT_PSPFileOutputStream::Write(const void* buffer,
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210 NPT_Size bytes_to_write,
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211 NPT_Size* bytes_written)
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212 {
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213 size_t nb_written;
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214
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215 nb_written = sceIoWrite(m_FileReference->GetFile(), (SceChar8*)buffer, bytes_to_write);
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216
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217 if (nb_written > 0) {
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218 if (bytes_written) *bytes_written = (NPT_Size)nb_written;
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219 m_Position += nb_written;
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220 return NPT_SUCCESS;
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221 } else {
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222 if (bytes_written) *bytes_written = 0;
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223 return NPT_ERROR_WRITE_FAILED;
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224 }
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225 }
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226
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227 /*----------------------------------------------------------------------
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228 | NPT_PSPFile
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229 +---------------------------------------------------------------------*/
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230 class NPT_PSPFile: public NPT_FileInterface
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231 {
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232 public:
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233 // constructors and destructor
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234 NPT_PSPFile(const char* name);
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235 ~NPT_PSPFile();
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236
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237 // NPT_FileInterface methods
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238 NPT_Result Open(OpenMode mode);
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239 NPT_Result Close();
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240 NPT_Result GetSize(NPT_Size& size);
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241 NPT_Result GetInputStream(NPT_InputStreamReference& stream);
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242 NPT_Result GetOutputStream(NPT_OutputStreamReference& stream);
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243
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244 private:
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245 // members
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246 NPT_String m_Name;
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247 OpenMode m_Mode;
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248 NPT_PSPFileReference m_FileReference;
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249 NPT_Size m_Size;
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250 };
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251
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252 /*----------------------------------------------------------------------
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253 | NPT_PSPFile::NPT_PSPFile
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254 +---------------------------------------------------------------------*/
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255 NPT_PSPFile::NPT_PSPFile(const char* name) :
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256 m_Name(name),
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257 m_Mode(0),
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258 m_Size(0)
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259 {
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260 }
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261
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262 /*----------------------------------------------------------------------
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263 | NPT_PSPFile::~NPT_PSPFile
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264 +---------------------------------------------------------------------*/
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265 NPT_PSPFile::~NPT_PSPFile()
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266 {
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267 Close();
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268 }
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269
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270 /*----------------------------------------------------------------------
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271 | NPT_PSPFile::Open
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272 +---------------------------------------------------------------------*/
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273 NPT_Result
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274 NPT_PSPFile::Open(NPT_File::OpenMode mode)
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275 {
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276 SceUID file = -1;
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277
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278 // check if we're already open
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279 if (!m_FileReference.IsNull()) {
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280 return NPT_ERROR_FILE_ALREADY_OPEN;
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281 }
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282
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283 // store the mode
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284 m_Mode = mode;
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285
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286 // check for special names
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287 const char* name = (const char*)m_Name;
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288 int flags = 0;
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289 SceMode perms = 0; // files opened/created on the PSP require certain permissions
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290
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291 /* compute mode */
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292 if (mode & NPT_FILE_BYTE_STREAM_MODE_WRITE) {
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293 perms = 0777; // since we're possibly creating a file, give it full permissions
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294 if (mode & NPT_FILE_BYTE_STREAM_MODE_CREATE) {
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295 if (mode & NPT_FILE_BYTE_STREAM_MODE_TRUNCATE) {
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296 /* write, read, create, truncate */
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297 flags = SCE_O_RDWR | SCE_O_CREAT | SCE_O_TRUNC;
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298 } else {
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299 /* write, read, create */
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300 flags = SCE_O_RDWR | SCE_O_CREAT | SCE_O_APPEND;
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301 }
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302 } else {
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303 if (mode & NPT_FILE_BYTE_STREAM_MODE_TRUNCATE) {
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304 /* write, read, truncate */
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305 flags = SCE_O_RDWR | SCE_O_CREAT | SCE_O_TRUNC;
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306 } else {
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307 /* write, read */
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308 flags = SCE_O_RDWR;
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309 }
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310 }
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311 } else {
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312 /* read only */
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313 flags = SCE_O_RDONLY;
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314 }
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315
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316 // open the file
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317 file = sceIoOpen(name, flags, perms);
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318
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319 // test the result of the open
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320 if (file < 0) {
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321 if (file == (SceUID)SCE_ERROR_ERRNO_ENOENT ) {
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322 return NPT_ERROR_NO_SUCH_FILE;
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323 } else if (file == (SceUID)SCE_ERROR_ERRNO_EACCESS ) {
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324 return NPT_ERROR_PERMISSION_DENIED;
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325 } else {
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326 return NPT_FAILURE;
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327 }
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328 } else {
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329 // get the size
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330 SceOff off;
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331 off = sceIoLseek(file, 0, SCE_SEEK_END);
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332 if (off >= 0) {
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333 m_Size = off;
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334 sceIoLseek(file, 0, SCE_SEEK_SET);
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335 }
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336 }
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337
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338 // create a reference to the FILE object
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339 m_FileReference = new NPT_PSPileWrapper(file);
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340
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341 return NPT_SUCCESS;
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342 }
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343
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344 /*----------------------------------------------------------------------
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345 | NPT_PSPile::Close
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346 +---------------------------------------------------------------------*/
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347 NPT_Result
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348 NPT_PSPile::Close()
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349 {
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350 // release the file reference
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351 m_FileReference = NULL;
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352
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353 // reset the mode
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354 m_Mode = 0;
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355
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356 return NPT_SUCCESS;
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357 }
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358
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359 /*----------------------------------------------------------------------
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360 | NPT_PSPile::GetSize
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361 +---------------------------------------------------------------------*/
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362 NPT_Result
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363 NPT_PSPile::GetSize(NPT_Size& size)
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364 {
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365 // default value
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366 size = 0;
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367
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368 // check that the file is open
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369 if (m_FileReference.IsNull()) return NPT_ERROR_FILE_NOT_OPEN;
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370
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371 // return the size
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372 size = m_Size;
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373
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374 return NPT_SUCCESS;
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375 }
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376
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377 /*----------------------------------------------------------------------
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378 | NPT_PSPile::GetInputStream
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379 +---------------------------------------------------------------------*/
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380 NPT_Result
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381 NPT_PSPile::GetInputStream(NPT_InputStreamReference& stream)
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382 {
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383 // default value
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384 stream = NULL;
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385
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386 // check that the file is open
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387 if (m_FileReference.IsNull()) return NPT_ERROR_FILE_NOT_OPEN;
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388
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389 // check that the mode is compatible
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390 if (!(m_Mode & NPT_FILE_OPEN_MODE_READ)) {
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391 return NPT_ERROR_FILE_NOT_READABLE;
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392 }
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393
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394 // create a stream
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395 stream = new NPT_PSPileInputStream(m_FileReference, m_Size);
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396
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397 return NPT_SUCCESS;
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398 }
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399
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400 /*----------------------------------------------------------------------
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401 | NPT_PSPile::GetOutputStream
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402 +---------------------------------------------------------------------*/
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403 NPT_Result
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404 NPT_PSPile::GetOutputStream(NPT_OutputStreamReference& stream)
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405 {
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406 // default value
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407 stream = NULL;
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408
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409 // check that the file is open
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410 if (m_FileReference.IsNull()) return NPT_ERROR_FILE_NOT_OPEN;
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411
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412 // check that the mode is compatible
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413 if (!(m_Mode & NPT_FILE_OPEN_MODE_WRITE)) {
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414 return NPT_ERROR_FILE_NOT_WRITABLE;
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415 }
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416
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417 // create a stream
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418 stream = new NPT_PSPileOutputStream(m_FileReference);
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419
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420 return NPT_SUCCESS;
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421 }
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422
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423 /*----------------------------------------------------------------------
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424 | NPT_File::NPT_File
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425 +---------------------------------------------------------------------*/
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426 NPT_File::NPT_File(const char* name)
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427 {
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428 m_Delegate = new NPT_PSPile(name);
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429 }
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430
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fraserofthenight
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431
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fraserofthenight
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432
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fraserofthenight
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433
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434
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435
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fraserofthenight
parents:
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436
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
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437
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fraserofthenight
parents:
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438
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
parents:
diff changeset
439
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
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440
3425707ddbf6 Initial import (hopefully this mercurial stuff works...)
fraserofthenight
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441