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1096
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1 /**
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2 * Copyright (c) 2006-2012 LOVE Development Team
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3 *
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4 * This software is provided 'as-is', without any express or implied
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5 * warranty. In no event will the authors be held liable for any damages
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6 * arising from the use of this software.
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7 *
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8 * Permission is granted to anyone to use this software for any purpose,
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9 * including commercial applications, and to alter it and redistribute it
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10 * freely, subject to the following restrictions:
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11 *
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12 * 1. The origin of this software must not be misrepresented; you must not
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13 * claim that you wrote the original software. If you use this software
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14 * in a product, an acknowledgment in the product documentation would be
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15 * appreciated but is not required.
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16 * 2. Altered source versions must be plainly marked as such, and must not be
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17 * misrepresented as being the original software.
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18 * 3. This notice may not be removed or altered from any source distribution.
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19 **/
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20
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21 #include "File.h"
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22
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23 // STD
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24 #include <cstring>
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25
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26 // LOVE
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27 #include "Filesystem.h"
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28 #include "filesystem/FileData.h"
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29
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30 namespace love
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31 {
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32 namespace filesystem
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33 {
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34 namespace physfs
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35 {
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36
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37 extern bool hack_setupWriteDirectory();
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38
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39 File::File(std::string filename)
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40 : filename(filename)
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41 , file(0)
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42 , mode(filesystem::File::CLOSED)
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43 {
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44 }
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45
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46 File::~File()
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47 {
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48 if (mode != CLOSED)
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49 close();
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50 }
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51
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52 bool File::open(Mode mode)
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53 {
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54 if (mode == CLOSED)
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55 return true;
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56
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57 // File must exist if read mode.
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58 if ((mode == READ) && !PHYSFS_exists(filename.c_str()))
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59 throw love::Exception("Could not open file %s. Does not exist.", filename.c_str());
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60
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61 // Check whether the write directory is set.
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62 if ((mode == APPEND || mode == WRITE) && (PHYSFS_getWriteDir() == 0) && !hack_setupWriteDirectory())
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63 throw love::Exception("Could not set write directory.");
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64
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65 // File already open?
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66 if (file != 0)
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67 return false;
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68
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69 this->mode = mode;
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70
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71 switch (mode)
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72 {
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73 case READ:
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74 file = PHYSFS_openRead(filename.c_str());
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75 break;
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76 case APPEND:
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77 file = PHYSFS_openAppend(filename.c_str());
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78 break;
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79 case WRITE:
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80 file = PHYSFS_openWrite(filename.c_str());
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81 break;
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82 default:
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83 break;
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84 }
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85
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86 return (file != 0);
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87 }
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88
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89 bool File::close()
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90 {
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91 if (!PHYSFS_close(file))
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92 return false;
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93 mode = CLOSED;
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94 file = 0;
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95 return true;
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96 }
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97
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98 int64 File::getSize()
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99 {
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100 // If the file is closed, open it to
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101 // check the size.
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102 if (file == 0)
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103 {
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104 open(READ);
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105 int64 size = (int64)PHYSFS_fileLength(file);
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106 close();
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107 return size;
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108 }
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109
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110 return (int64)PHYSFS_fileLength(file);
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111 }
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112
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113
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114 Data *File::read(int64 size)
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115 {
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116 bool isOpen = (file != 0);
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117
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118 if (!isOpen && !open(READ))
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119 throw love::Exception("Could not read file %s.", filename.c_str());
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120
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121 int64 max = (int64)PHYSFS_fileLength(file);
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122 size = (size == ALL) ? max : size;
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123 size = (size > max) ? max : size;
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124
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125 FileData *fileData = new FileData(size, getFilename());
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126
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127 read(fileData->getData(), size);
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128
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129 if (!isOpen)
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130 close();
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131
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132 return fileData;
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133 }
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134
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135 int64 File::read(void *dst, int64 size)
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136 {
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137 bool isOpen = (file != 0);
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138
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139 if (!isOpen)
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140 open(READ);
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141
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142 int64 max = (int64)PHYSFS_fileLength(file);
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143 size = (size == ALL) ? max : size;
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144 size = (size > max) ? max : size;
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145 // Sadly, we'll have to clamp to 32 bits here
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146 size = (size > LOVE_UINT32_MAX) ? LOVE_UINT32_MAX : size;
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147
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148 int64 read = (int64)PHYSFS_read(file, dst, 1, (int) size);
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149
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150 if (!isOpen)
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151 close();
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152
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153 return read;
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154 }
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155
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156 bool File::write(const void *data, int64 size)
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157 {
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158 if (file == 0)
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159 throw love::Exception("Could not write to file. File not open.");
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160
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161 // Another clamp, for the time being.
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162 size = (size > LOVE_UINT32_MAX) ? LOVE_UINT32_MAX : size;
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163
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164 // Try to write.
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165 int64 written = static_cast<int64>(PHYSFS_write(file, data, 1, (int) size));
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166
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167 // Check that correct amount of data was written.
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168 if (written != size)
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169 return false;
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170
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171 return true;
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172 }
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173
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174 bool File::write(const Data *data, int64 size)
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175 {
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176 return write(data->getData(), (size == ALL) ? data->getSize() : size);
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177 }
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178
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179 #ifdef LOVE_WINDOWS
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180 // MSVC doesn't like the 'this' keyword
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181 // well, we'll use 'that'.
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182 // It zigs, we zag.
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183 inline bool test_eof(File *that, PHYSFS_File *)
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184 {
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185 int64 pos = that->tell();
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186 int64 size = that->getSize();
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187 return pos == -1 || size == -1 || pos >= size;
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188 }
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189 #else
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190 inline bool test_eof(File *, PHYSFS_File *file)
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191 {
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192 return PHYSFS_eof(file);
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193 }
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194 #endif
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195
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196 bool File::eof()
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197 {
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198 if (file == 0 || test_eof(this, file))
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199 return true;
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200 return false;
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201 }
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202
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203 int64 File::tell()
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204 {
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205 if (file == 0)
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206 return -1;
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207
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208 return (int64)PHYSFS_tell(file);
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209 }
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210
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211 bool File::seek(uint64 pos)
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212 {
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213 if (file == 0)
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214 return false;
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215
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216 if (!PHYSFS_seek(file, (PHYSFS_uint64)pos))
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217 return false;
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218 return true;
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219 }
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220
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221 std::string File::getFilename() const
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222 {
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223 return filename;
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224 }
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225
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226 std::string File::getExtension() const
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227 {
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228 std::string::size_type idx = filename.rfind('.');
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229
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230 if (idx != std::string::npos)
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231 return filename.substr(idx+1);
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232 else
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233 return std::string();
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234 }
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235
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236 filesystem::File::Mode File::getMode()
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237 {
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238 return mode;
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239 }
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240
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241 } // physfs
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242 } // filesystem
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243 } // love
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