Mercurial > octave
annotate liboctave/system/lo-sysdep.cc @ 30565:83f9f8bda883
maint: Merge stable to default.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 28 Dec 2021 18:59:33 -0500 |
parents | f69ddab4b0ec 796f54d4ddbf |
children | 1921d9d0e62b |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1996-2022 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
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26 #if defined (HAVE_CONFIG_H) |
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27 # include "config.h" |
2926 | 28 #endif |
29 | |
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30 #include <cstdlib> |
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31 #include <locale> |
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32 #include <codecvt> |
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33 |
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34 #include "dir-ops.h" |
5872 | 35 #include "file-ops.h" |
3069 | 36 #include "lo-error.h" |
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37 #include "lo-sysdep.h" |
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38 #include "localcharset-wrapper.h" |
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39 #include "putenv-wrapper.h" |
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40 #include "unistd-wrappers.h" |
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41 #include "unsetenv-wrapper.h" |
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43 #if defined (OCTAVE_USE_WINDOWS_API) |
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44 # include <windows.h> |
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45 # include <wchar.h> |
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46 |
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47 # include "filepos-wrappers.h" |
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48 # include "lo-hash.h" |
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49 # include "oct-locbuf.h" |
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50 # include "uniconv-wrappers.h" |
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51 # include "unwind-prot.h" |
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52 #endif |
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53 |
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54 namespace octave |
2926 | 55 { |
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56 namespace sys |
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57 { |
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58 int |
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59 system (const std::string& cmd_str) |
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60 { |
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61 #if defined (OCTAVE_USE_WINDOWS_API) |
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62 const std::wstring wcmd_str = u8_to_wstring (cmd_str); |
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63 |
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64 return _wsystem (wcmd_str.c_str ()); |
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65 #else |
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66 return ::system (cmd_str.c_str ()); |
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67 #endif |
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68 } |
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69 |
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70 std::string |
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71 getcwd (void) |
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72 { |
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73 std::string retval; |
3069 | 74 |
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75 #if defined (OCTAVE_USE_WINDOWS_API) |
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76 wchar_t *tmp = _wgetcwd (nullptr, 0); |
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77 |
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78 if (! tmp) |
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79 (*current_liboctave_error_handler) ("unable to find current directory"); |
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80 |
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81 std::wstring tmp_wstr (tmp); |
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82 free (tmp); |
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83 |
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84 std::string tmp_str = u8_from_wstring (tmp_wstr); |
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85 |
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86 retval = tmp_str; |
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87 |
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88 #else |
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89 // Using octave_getcwd_wrapper ensures that we have a getcwd that |
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90 // will allocate a buffer as large as necessary if buf and size are |
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91 // both 0. |
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93 char *tmp = octave_getcwd_wrapper (nullptr, 0); |
2926 | 94 |
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95 if (! tmp) |
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96 (*current_liboctave_error_handler) ("unable to find current directory"); |
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97 |
10250 | 98 retval = tmp; |
99 free (tmp); | |
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100 #endif |
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101 |
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102 return retval; |
10250 | 103 } |
2926 | 104 |
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105 int |
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106 chdir (const std::string& path_arg) |
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107 { |
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108 std::string path = sys::file_ops::tilde_expand (path_arg); |
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110 #if defined (OCTAVE_USE_WINDOWS_API) |
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111 if (path.length () == 2 && path[1] == ':') |
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112 path += '\\'; |
6244 | 113 #endif |
114 | |
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115 return octave_chdir_wrapper (path.c_str ()); |
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116 } |
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117 |
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118 bool |
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119 get_dirlist (const std::string& dirname, string_vector& dirlist, |
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120 std::string& msg) |
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121 { |
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122 dirlist = ""; |
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123 msg = ""; |
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124 #if defined (OCTAVE_USE_WINDOWS_API) |
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125 _WIN32_FIND_DATAW ffd; |
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126 |
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127 std::string path_name (dirname); |
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128 if (path_name.empty ()) |
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129 return true; |
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130 |
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131 if (path_name.back () == '\\' || path_name.back () == '/') |
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132 path_name.push_back ('*'); |
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133 else |
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134 path_name.append (R"(\*)"); |
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135 |
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136 // Find first file in directory. |
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137 std::wstring wpath_name = u8_to_wstring (path_name); |
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138 HANDLE hFind = FindFirstFileW (wpath_name.c_str (), &ffd); |
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139 if (INVALID_HANDLE_VALUE == hFind) |
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140 { |
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141 DWORD errCode = GetLastError (); |
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142 char *errorText = nullptr; |
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143 FormatMessageA (FORMAT_MESSAGE_FROM_SYSTEM | |
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144 FORMAT_MESSAGE_ALLOCATE_BUFFER | |
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145 FORMAT_MESSAGE_IGNORE_INSERTS, |
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146 nullptr, errCode, |
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147 MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), |
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148 reinterpret_cast <char *> (&errorText), 0, nullptr); |
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149 if (errorText != nullptr) |
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150 { |
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151 msg = std::string (errorText); |
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152 LocalFree (errorText); |
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153 } |
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154 return false; |
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155 } |
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156 |
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157 std::list<std::string> dirlist_str; |
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158 do |
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159 dirlist_str.push_back (u8_from_wstring (ffd.cFileName)); |
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160 while (FindNextFileW (hFind, &ffd) != 0); |
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161 |
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162 FindClose(hFind); |
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163 |
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164 dirlist = string_vector (dirlist_str); |
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165 |
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166 #else |
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167 |
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168 dir_entry dir (dirname); |
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169 |
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170 if (! dir) |
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171 { |
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172 msg = dir.error (); |
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173 return false; |
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174 } |
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175 |
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176 dirlist = dir.read (); |
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177 |
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178 dir.close (); |
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179 #endif |
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180 |
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181 return true; |
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182 } |
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183 |
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184 #if defined (OCTAVE_USE_WINDOWS_API) |
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185 |
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186 static bool check_fseek_ftell_workaround_needed (bool set_nonbuffered_mode) |
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187 { |
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188 // To check whether the workaround is needed: |
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189 // |
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190 // * Create a tmp file with LF line endings only. |
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191 // |
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192 // * Open that file for reading in text mode. |
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193 // |
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194 // * Read a line. |
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195 // |
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196 // * Use ftello to record the position of the beginning of the |
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197 // second line. |
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198 // |
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199 // * Read and save the contents of the second line. |
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200 // |
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201 // * Use fseeko to return to the saved position. |
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202 // |
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203 // * Read the second line again and compare to the previously |
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204 // saved text. |
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205 // |
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206 // * If the lines are different, we need to set non-buffered |
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207 // input mode for files opened in text mode. |
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208 |
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209 std::string tmpname = sys::tempnam ("", "oct-"); |
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210 |
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211 if (tmpname.empty ()) |
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212 { |
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213 (*current_liboctave_warning_handler) |
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214 ("fseek/ftell bug check failed (tmp name creation)!"); |
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215 return false; |
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216 } |
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217 |
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218 std::FILE *fptr = std::fopen (tmpname.c_str (), "wb"); |
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219 |
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220 if (! fptr) |
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221 { |
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222 (*current_liboctave_warning_handler) |
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223 ("fseek/ftell bug check failed (opening tmp file for writing)!"); |
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224 return false; |
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225 } |
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226 |
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227 fprintf (fptr, "%s", "foo\nbar\nbaz\n"); |
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228 |
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229 std::fclose (fptr); |
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230 |
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231 fptr = std::fopen (tmpname.c_str (), "rt"); |
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232 |
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233 if (! fptr) |
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234 { |
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235 (*current_liboctave_warning_handler) |
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236 ("fseek/ftell bug check failed (opening tmp file for reading)!"); |
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237 return false; |
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238 } |
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239 |
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240 unwind_action act ([=] () |
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241 { |
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242 std::fclose (fptr); |
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243 sys::unlink (tmpname); |
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244 }); |
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245 |
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246 if (set_nonbuffered_mode) |
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247 ::setvbuf (fptr, nullptr, _IONBF, 0); |
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248 |
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249 while (true) |
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250 { |
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251 int c = fgetc (fptr); |
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252 |
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253 if (c == EOF) |
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254 { |
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255 (*current_liboctave_warning_handler) |
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256 ("fseek/ftell bug check failed (skipping first line)!"); |
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257 return false; |
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258 } |
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259 |
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260 if (c == '\n') |
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261 break; |
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262 } |
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263 |
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264 off_t pos = octave_ftello_wrapper (fptr); |
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265 |
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266 char buf1[8]; |
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267 int i = 0; |
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268 while (true) |
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269 { |
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270 int c = fgetc (fptr); |
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271 |
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272 if (c == EOF) |
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273 { |
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274 (*current_liboctave_warning_handler) |
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275 ("fseek/ftell bug check failed (reading second line)!"); |
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276 return false; |
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277 } |
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278 |
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279 if (c == '\n') |
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280 break; |
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281 |
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282 buf1[i++] = static_cast<char> (c); |
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283 } |
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284 buf1[i] = '\0'; |
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285 |
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286 octave_fseeko_wrapper (fptr, pos, SEEK_SET); |
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287 |
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288 char buf2[8]; |
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289 i = 0; |
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290 while (true) |
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291 { |
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292 int c = fgetc (fptr); |
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293 |
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294 if (c == EOF) |
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295 { |
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296 (*current_liboctave_warning_handler) |
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297 ("fseek/ftell bug check failed (reading after repositioning)!"); |
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298 return false; |
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299 } |
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300 |
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301 if (c == '\n') |
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302 break; |
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303 |
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304 buf2[i++] = static_cast<char> (c); |
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305 } |
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306 buf2[i] = '\0'; |
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307 |
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308 return strcmp (buf1, buf2); |
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309 } |
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310 |
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311 #endif |
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312 |
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313 std::FILE * |
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314 fopen (const std::string& filename, const std::string& mode) |
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315 { |
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316 #if defined (OCTAVE_USE_WINDOWS_API) |
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317 |
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318 std::wstring wfilename = u8_to_wstring (filename); |
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319 std::wstring wmode = u8_to_wstring (mode); |
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320 |
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321 std::FILE *fptr = _wfopen (wfilename.c_str (), wmode.c_str ()); |
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322 |
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323 static bool fseek_ftell_bug_workaround_needed = false; |
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324 static bool fseek_ftell_bug_checked = false; |
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325 |
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326 if (! fseek_ftell_bug_checked && mode.find ('t') != std::string::npos) |
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327 { |
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328 // FIXME: Is the following workaround needed for all files |
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329 // opened in text mode, or only for files opened for reading? |
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330 |
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331 // Try to avoid fseek/ftell bug on Windows systems by setting |
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332 // non-buffered input mode for files opened in text mode, but |
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333 // only if it appears that the workaround is needed. See |
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334 // Octave bug #58055. |
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335 |
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336 // To check whether the workaround is needed: |
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337 // |
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338 // * Create a tmp file with LF line endings only. |
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339 // |
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340 // * Open that file for reading in text mode. |
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341 // |
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342 // * Read a line. |
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343 // |
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344 // * Use ftello to record the position of the beginning of |
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345 // the second line. |
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346 // |
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347 // * Read and save the contents of the second line. |
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348 // |
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349 // * Use fseeko to return to the saved position. |
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350 // |
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351 // * Read the second line again and compare to the |
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352 // previously saved text. |
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353 // |
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354 // * If the lines are different, we need to set non-buffered |
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355 // input mode for files opened in text mode. |
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356 // |
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357 // * To verify that the workaround solves the problem, |
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358 // repeat the above test with non-buffered input mode. If |
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359 // that fails, warn that there may be trouble with |
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360 // ftell/fseek when reading files opened in text mode. |
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361 |
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362 if (check_fseek_ftell_workaround_needed (false)) |
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363 { |
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364 if (check_fseek_ftell_workaround_needed (true)) |
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365 (*current_liboctave_warning_handler) |
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366 ("fseek/ftell may fail for files opened in text mode"); |
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367 else |
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368 fseek_ftell_bug_workaround_needed = true; |
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369 } |
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370 |
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371 fseek_ftell_bug_checked = true; |
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372 } |
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373 |
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374 if (fseek_ftell_bug_workaround_needed |
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375 && mode.find ('t') != std::string::npos) |
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376 ::setvbuf (fptr, nullptr, _IONBF, 0); |
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377 |
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378 return fptr; |
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379 |
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380 #else |
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381 return std::fopen (filename.c_str (), mode.c_str ()); |
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382 #endif |
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383 } |
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384 |
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385 std::fstream |
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386 fstream (const std::string& filename, const std::ios::openmode mode) |
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387 { |
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388 #if defined (OCTAVE_USE_WINDOWS_API) |
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389 |
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390 std::wstring wfilename = u8_to_wstring (filename); |
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391 |
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392 return std::fstream (wfilename.c_str (), mode); |
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393 |
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394 #else |
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395 return std::fstream (filename.c_str (), mode); |
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396 #endif |
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397 } |
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398 |
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399 std::ifstream |
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400 ifstream (const std::string& filename, const std::ios::openmode mode) |
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401 { |
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402 #if defined (OCTAVE_USE_WINDOWS_API) |
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403 |
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404 std::wstring wfilename = u8_to_wstring (filename); |
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405 |
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406 return std::ifstream (wfilename.c_str (), mode); |
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407 |
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408 #else |
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409 return std::ifstream (filename.c_str (), mode); |
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410 #endif |
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411 } |
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412 |
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413 std::ofstream |
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414 ofstream (const std::string& filename, const std::ios::openmode mode) |
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415 { |
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416 #if defined (OCTAVE_USE_WINDOWS_API) |
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417 |
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418 std::wstring wfilename = u8_to_wstring (filename); |
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419 |
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420 return std::ofstream (wfilename.c_str (), mode); |
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421 |
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422 #else |
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423 return std::ofstream (filename.c_str (), mode); |
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424 #endif |
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425 } |
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426 |
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427 void |
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428 putenv_wrapper (const std::string& name, const std::string& value) |
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429 { |
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430 std::string new_env = name + "=" + value; |
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431 |
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432 // FIXME: The malloc leaks memory, but so would a call to setenv. |
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433 // Short of extreme measures to track memory, altering the environment |
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434 // always leaks memory, but the saving grace is that the leaks are small. |
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435 |
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436 // As far as I can see there's no way to distinguish between the |
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437 // various errors; putenv doesn't have errno values. |
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438 |
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439 #if defined (OCTAVE_USE_WINDOWS_API) |
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440 std::wstring new_wenv = u8_to_wstring (new_env); |
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441 |
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442 int len = (new_wenv.length () + 1) * sizeof (wchar_t); |
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443 |
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444 wchar_t *new_item = static_cast<wchar_t *> (std::malloc (len)); |
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445 |
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446 wcscpy (new_item, new_wenv.c_str()); |
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447 |
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448 if (_wputenv (new_item) < 0) |
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449 (*current_liboctave_error_handler) |
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450 ("putenv (%s) failed", new_env.c_str()); |
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451 #else |
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452 int len = new_env.length () + 1; |
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453 |
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454 char *new_item = static_cast<char *> (std::malloc (len)); |
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455 |
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456 std::strcpy (new_item, new_env.c_str()); |
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457 |
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458 if (octave_putenv_wrapper (new_item) < 0) |
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459 (*current_liboctave_error_handler) ("putenv (%s) failed", new_item); |
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460 #endif |
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461 } |
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462 |
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463 std::string |
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464 getenv_wrapper (const std::string& name) |
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465 { |
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466 #if defined (OCTAVE_USE_WINDOWS_API) |
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467 std::wstring wname = u8_to_wstring (name); |
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468 wchar_t *env = _wgetenv (wname.c_str ()); |
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469 return env ? u8_from_wstring (env) : ""; |
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470 #else |
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471 char *env = ::getenv (name.c_str ()); |
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472 return env ? env : ""; |
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473 #endif |
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474 } |
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475 |
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476 int |
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477 unsetenv_wrapper (const std::string& name) |
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478 { |
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479 #if defined (OCTAVE_USE_WINDOWS_API) |
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480 putenv_wrapper (name, ""); |
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481 |
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482 std::wstring wname = u8_to_wstring (name); |
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483 return (SetEnvironmentVariableW (wname.c_str (), nullptr) ? 0 : -1); |
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484 #else |
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485 return octave_unsetenv_wrapper (name.c_str ()); |
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486 #endif |
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487 } |
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488 |
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489 std::wstring |
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490 u8_to_wstring (const std::string& utf8_string) |
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491 { |
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492 // convert multibyte UTF-8 string to wide character string |
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493 static std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> |
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494 wchar_conv; |
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495 |
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496 std::wstring retval = L""; |
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497 |
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498 try |
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499 { |
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500 retval = wchar_conv.from_bytes (utf8_string); |
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501 } |
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502 catch (const std::range_error& e) |
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503 { |
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504 // What to do in case of error? |
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505 // error ("u8_to_wstring: converting from UTF-8 to wchar_t: %s", |
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506 // e.what ()); |
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507 } |
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508 |
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509 return retval; |
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510 } |
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511 |
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512 std::string |
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513 u8_from_wstring (const std::wstring& wchar_string) |
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514 { |
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515 // convert wide character string to multibyte UTF-8 string |
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516 static std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> |
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517 wchar_conv; |
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518 |
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519 std::string retval = ""; |
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520 |
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521 try |
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522 { |
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523 retval = wchar_conv.to_bytes (wchar_string); |
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524 } |
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525 catch (const std::range_error& e) |
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526 { |
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527 // What to do in case of error? |
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528 // error ("u8_from_wstring: converting from wchar_t to UTF-8: %s", |
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529 // e.what ()); |
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530 } |
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531 |
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532 return retval; |
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533 } |
25517
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534 |
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535 // At quite a few places in the code we are passing file names as |
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536 // char arrays to external library functions. |
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537 |
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538 // When these functions try to locate the corresponding file on the |
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539 // disc, they need to use the wide character API on Windows to |
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540 // correctly open files with non-ASCII characters. |
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541 |
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542 // But they have no way of knowing which encoding we are using for |
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543 // the passed string. So they have no way of reliably converting to |
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544 // a wchar_t array. (I.e. there is no possible fix for these |
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545 // functions with current C or C++.) |
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546 |
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547 // To solve the dilemma, the function "get_ASCII_filename" first |
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548 // checks whether there are any non-ASCII characters in the passed |
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549 // file name. If there are not, it returns the original name. |
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550 |
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551 // Otherwise, it optionally tries to convert the file name to the locale |
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552 // charset. |
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553 |
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554 // If the file name contains characters that cannot be converted to the |
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555 // locale charset (or that step is skipped), it tries to obtain the short |
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556 // file name (8.3 naming scheme) which only consists of ASCII characters |
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557 // and are safe to pass. However, short file names can be disabled for |
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558 // performance reasons on the file system level with NTFS and they are not |
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559 // stored on other file systems (e.g. ExFAT). So there is no guarantee |
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560 // that these exist. |
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561 |
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562 // If short file names are not stored, a hard link to the file is |
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563 // created. For this the path to the file is split at the deepest |
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564 // possible level that doesn't contain non-ASCII characters. At |
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565 // that level a hidden folder is created that holds the hard links. |
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566 // That means we need to have write access on that location. A path |
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567 // to that hard link is returned. |
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568 |
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569 // If the file system is FAT32, there are no hard links. But FAT32 |
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570 // always stores short file names. So we are safe. |
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571 |
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572 // ExFAT that is occasionally used on USB sticks and SD cards stores |
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573 // neither short file names nor does it support hard links. So for |
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574 // exFAT with this function, there is (currently) no way to generate |
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575 // a file name that is stripped from non-ASCII characters but still |
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576 // is valid. |
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577 |
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578 // For Unixy systems, this function does nothing. |
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579 |
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580 std::string |
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581 get_ASCII_filename (const std::string& orig_file_name, |
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582 const bool allow_locale) |
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583 { |
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584 #if defined (OCTAVE_USE_WINDOWS_API) |
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585 |
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586 // Return file name that only contains ASCII characters that can |
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587 // be used to access the file orig_file_name. The original file |
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588 // must exist in the file system before calling this function. |
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589 // This is useful for passing file names to functions that are not |
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590 // aware of the character encoding we are using. |
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591 |
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592 // 0. Check whether filename contains non-ASCII (UTF-8) characters. |
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593 |
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594 std::string::const_iterator first_non_ASCII |
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595 = std::find_if (orig_file_name.begin (), orig_file_name.end (), |
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596 [](char c) { return (c < 0 || c >= 128); }); |
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597 |
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598 if (first_non_ASCII == orig_file_name.end ()) |
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599 return orig_file_name; |
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600 |
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601 // 1. Optionally, check if all characters in the path can be successfully |
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602 // converted to the locale charset |
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603 if (allow_locale) |
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604 { |
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605 const char *locale = octave_locale_charset_wrapper (); |
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606 if (locale) |
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607 { |
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608 const uint8_t *name_u8 = reinterpret_cast<const uint8_t *> |
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609 (orig_file_name.c_str ()); |
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610 std::size_t length = 0; |
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611 char *name_locale = octave_u8_conv_to_encoding_strict |
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612 (locale, name_u8, |
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613 orig_file_name.length () + 1, &length); |
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614 if (name_locale) |
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615 { |
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616 std::string file_name_locale (name_locale, length); |
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617 free (name_locale); |
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618 return file_name_locale; |
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619 } |
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620 } |
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621 } |
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622 |
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623 // 2. Check if file system stores short filenames (might be ASCII-only). |
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624 |
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625 std::wstring w_orig_file_name_str = u8_to_wstring (orig_file_name); |
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626 const wchar_t *w_orig_file_name = w_orig_file_name_str.c_str (); |
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627 |
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628 // Get full path to file |
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629 wchar_t w_full_file_name[_MAX_PATH]; |
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630 if (_wfullpath (w_full_file_name, w_orig_file_name, _MAX_PATH) == nullptr) |
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631 return orig_file_name; |
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632 |
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633 std::wstring w_full_file_name_str = w_full_file_name; |
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634 |
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635 // Get short filename (8.3) from UTF-16 filename. |
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636 |
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637 long length = GetShortPathNameW (w_full_file_name, nullptr, 0); |
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638 |
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639 if (length > 0) |
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640 { |
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641 // Dynamically allocate the correct size (terminating null char |
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642 // was included in length). |
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643 |
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644 OCTAVE_LOCAL_BUFFER (wchar_t, w_short_file_name, length); |
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645 GetShortPathNameW (w_full_file_name, w_short_file_name, length); |
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646 |
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647 std::wstring w_short_file_name_str |
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648 = std::wstring (w_short_file_name, length); |
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649 |
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650 if (w_short_file_name_str.compare (0, length-1, w_full_file_name_str) != 0) |
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651 { |
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652 // Check whether short file name contains non-ASCII characters |
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653 std::string short_file_name |
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654 = u8_from_wstring (w_short_file_name_str); |
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655 first_non_ASCII |
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656 = std::find_if (short_file_name.begin (), |
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657 short_file_name.end (), |
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658 [](char c) { return (c < 0 || c >= 128); }); |
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659 if (first_non_ASCII == short_file_name.end ()) |
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660 return short_file_name; |
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661 } |
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662 } |
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663 |
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664 // 3. Create hard link with only-ASCII characters. |
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665 // Get longest possible part of path that only contains ASCII chars. |
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666 |
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667 std::wstring::iterator w_first_non_ASCII |
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668 = std::find_if (w_full_file_name_str.begin (), w_full_file_name_str.end (), |
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669 [](wchar_t c) { return (c < 0 || c >= 128); }); |
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670 std::wstring tmp_substr |
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671 = std::wstring (w_full_file_name_str.begin (), w_first_non_ASCII); |
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672 |
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673 std::size_t pos |
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674 = tmp_substr.find_last_of (u8_to_wstring (file_ops::dir_sep_chars ())); |
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675 |
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676 std::string par_dir |
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677 = u8_from_wstring (w_full_file_name_str.substr (0, pos+1)); |
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678 |
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679 // Create .oct_ascii directory. |
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680 // FIXME: We need to have write permission in this location. |
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681 |
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682 std::string oct_ascii_dir = par_dir + ".oct_ascii"; |
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683 std::string test_dir = canonicalize_file_name (oct_ascii_dir); |
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684 |
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685 if (test_dir.empty ()) |
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686 { |
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687 std::string msg; |
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688 int status = sys::mkdir (oct_ascii_dir, 0777, msg); |
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689 |
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690 if (status < 0) |
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691 return orig_file_name; |
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692 |
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693 // Set hidden property. |
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694 SetFileAttributesA (oct_ascii_dir.c_str (), FILE_ATTRIBUTE_HIDDEN); |
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695 } |
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696 |
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697 // Create file from hash of full filename. |
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698 std::string filename_hash |
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699 = (oct_ascii_dir + file_ops::dir_sep_str () |
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700 + crypto::hash ("SHA1", orig_file_name)); |
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701 |
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702 // FIXME: This is just to check if the file exists. Use a more efficient |
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703 // method. |
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704 std::string abs_filename_hash = canonicalize_file_name (filename_hash); |
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705 |
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706 if (! abs_filename_hash.empty ()) |
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707 sys::unlink (filename_hash); |
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708 |
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709 // At this point, we know that we have only ASCII characters. |
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710 // So instead of converting, just copy the characters to std::wstring. |
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711 std::wstring w_filename_hash (filename_hash.begin (), |
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712 filename_hash.end ()); |
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713 |
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714 if (CreateHardLinkW (w_filename_hash.c_str (), w_orig_file_name, nullptr)) |
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715 return filename_hash; |
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716 |
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717 #else |
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718 |
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719 octave_unused_parameter (allow_locale); |
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720 |
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721 #endif |
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722 |
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723 return orig_file_name; |
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724 } |
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725 } |
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726 } |