Mercurial > octave
annotate libinterp/corefcn/oct-stream.h @ 30822:0826c503f294
Encoding facet based on gnulib uniconv for STL iostreams (bug #61839).
* liboctave/util/oct-string.h, liboctave/util/oct-string.cc (codecvt_u8): Add
encoding facet based on gnulib uniconv for STL iostreams.
* liboctave/wrappers/uniconv-wrappers.h, liboctave/wrappers/uniconv-wrappers.c
(octave_u8_conv_from_encoding_offsets, octave_u8_conv_to_encoding_offsets): Add
new wrappers.
* libinterp/corefcn/oct-stream.h, libinterp/corefcn/oct-stream.cc
(octave::stream): Wrap output stream with encoding facet.
* libinterp/corefcn/utils.h, libinterp/corefcn/utils.cc (format, vformat):
Remove functions that are no longer needed.
* libinterp/corefcn/file-io.cc: Add BIST.
author | Markus Mützel <markus.muetzel@gmx.de> |
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date | Sat, 05 Mar 2022 21:20:58 +0100 |
parents | 83f9f8bda883 |
children | af38813e5b89 |
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 //////////////////////////////////////////////////////////////////////// |
2117 | 25 |
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26 #if ! defined (octave_oct_stream_h) |
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27 #define octave_oct_stream_h 1 |
2117 | 28 |
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29 #include "octave-config.h" |
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30 |
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31 #include <ios> |
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32 #include <iosfwd> |
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33 #include <list> |
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34 #include <map> |
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35 #include <memory> |
2877 | 36 #include <string> |
2117 | 37 |
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38 #include "oct-string.h" |
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39 |
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40 // These only appear as reference arguments or return values. |
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41 |
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42 class Cell; |
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43 class octave_value; |
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44 class octave_value_list; |
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45 class string_vector; |
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46 |
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47 #include "Array-fwd.h" |
2317 | 48 #include "data-conv.h" |
49 #include "mach-info.h" | |
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51 namespace octave |
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52 { |
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53 class interpreter; |
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54 |
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55 // These are only needed as arguments to private functions, so they |
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56 // are also treated as private. |
2117 | 57 |
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58 class scanf_format_elt; |
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59 class scanf_format_list; |
2117 | 60 |
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61 class printf_format_elt; |
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62 class printf_format_list; |
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63 |
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64 // Provide an interface for Octave streams. |
2117 | 65 |
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66 class |
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67 OCTINTERP_API |
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68 base_stream |
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69 { |
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70 friend class stream; |
2117 | 71 |
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72 public: |
2117 | 73 |
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74 base_stream (std::ios::openmode arg_md = std::ios::in | std::ios::out, |
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75 mach_info::float_format ff = mach_info::native_float_format (), |
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76 const std::string& encoding = "utf-8") |
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77 : m_mode (arg_md), m_flt_fmt (ff), m_encoding (encoding), |
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78 m_conv_ostream (nullptr), m_fail (false), m_open_state (true), |
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79 m_errmsg () |
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80 { } |
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82 // No copying! |
2117 | 83 |
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84 base_stream (const base_stream&) = delete; |
2117 | 85 |
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86 base_stream& operator = (const base_stream&) = delete; |
2117 | 87 |
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88 virtual ~base_stream (void) = default; |
2117 | 89 |
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90 // The remaining functions are not specific to input or output only, |
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91 // and must be provided by the derived classes. |
2117 | 92 |
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93 // Position a stream at OFFSET relative to ORIGIN. |
2117 | 94 |
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95 virtual int seek (off_t offset, int origin) = 0; |
2117 | 96 |
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97 // Return current stream position. |
2117 | 98 |
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99 virtual off_t tell (void) = 0; |
2117 | 100 |
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101 // Return TRUE if EOF has been reached on this stream. |
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102 |
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103 virtual bool eof (void) const = 0; |
2117 | 104 |
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105 // The name of the file. |
2117 | 106 |
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107 virtual std::string name (void) const = 0; |
2117 | 108 |
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109 // If the derived class provides this function and it returns a |
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110 // pointer to a valid istream, scanf(), read(), getl(), and gets() |
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111 // will automatically work for this stream. |
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113 virtual std::istream * input_stream (void) { return nullptr; } |
3340 | 114 |
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115 // If the derived class provides this function and it returns a |
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116 // pointer to a valid ostream, flush(), write(), and printf() will |
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117 // automatically work for this stream. |
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119 virtual std::ostream * output_stream (void) { return nullptr; } |
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121 // Return either the original output stream or one wrapped with the |
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122 // encoding facet. |
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123 |
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124 std::ostream * preferred_output_stream (void) |
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125 { |
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126 if (! m_encoding.compare ("utf-8")) |
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127 return output_stream (); |
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128 |
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129 if (m_conv_ostream) |
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130 return m_conv_ostream; |
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131 |
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132 // wrap the output stream with encoding conversion facet |
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133 std::ostream *os = output_stream (); |
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134 if (os && *os) |
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135 { |
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136 convfacet_u8 *facet = new convfacet_u8 (m_encoding); |
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137 std::wbuffer_convert<convfacet_u8, char> *converter |
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138 = new std::wbuffer_convert<convfacet_u8, char> (os->rdbuf (), |
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139 facet); |
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140 m_conv_ostream = new std::ostream (converter); |
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141 } |
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142 |
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143 return (m_conv_ostream ? m_conv_ostream : output_stream ()); |
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144 } |
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145 |
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146 // Return TRUE if this stream is open. |
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147 |
27172 | 148 bool is_open (void) const { return m_open_state; } |
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149 |
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150 virtual void do_close (void) { } |
3340 | 151 |
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152 void close (void) |
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153 { |
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154 if (is_open ()) |
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155 { |
27172 | 156 m_open_state = false; |
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157 do_close (); |
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158 } |
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159 } |
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160 |
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161 virtual int file_number (void) const |
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162 { |
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163 // Kluge alert! |
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165 if (name () == "stdin") |
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166 return 0; |
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167 else if (name () == "stdout") |
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168 return 1; |
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169 else if (name () == "stderr") |
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170 return 2; |
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171 else |
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172 return -1; |
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173 } |
2117 | 174 |
27172 | 175 bool ok (void) const { return ! m_fail; } |
2117 | 176 |
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177 // Return current error message for this stream. |
2117 | 178 |
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179 std::string error (bool clear, int& err_num); |
2117 | 180 |
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181 protected: |
2117 | 182 |
27172 | 183 int mode (void) const { return m_mode; } |
2117 | 184 |
27172 | 185 mach_info::float_format float_format (void) const { return m_flt_fmt; } |
2117 | 186 |
27172 | 187 std::string encoding (void) const { return m_encoding; } |
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188 |
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189 // Set current error state and set fail to TRUE. |
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191 OCTINTERP_API void error (const std::string& msg); |
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192 OCTINTERP_API void error (const std::string& who, const std::string& msg); |
2117 | 193 |
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194 // Clear any error message and set fail to FALSE. |
3340 | 195 |
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196 OCTINTERP_API void clear (void); |
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197 |
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198 // Clear stream state. |
2117 | 199 |
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200 OCTINTERP_API void clearerr (void); |
2117 | 201 |
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202 private: |
2117 | 203 |
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204 // The permission bits for the file. Should be some combination of |
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205 // std::ios::open_mode bits. |
27172 | 206 int m_mode; |
2117 | 207 |
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208 // Data format. |
27172 | 209 mach_info::float_format m_flt_fmt; |
2117 | 210 |
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211 // Code page |
27172 | 212 std::string m_encoding; |
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213 |
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214 // encoding conversion facet |
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215 typedef string::deletable_facet<string::codecvt_u8> convfacet_u8; |
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216 |
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217 std::wbuffer_convert<convfacet_u8, char> *m_converter; |
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218 |
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219 // wrappers for encoding conversion |
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220 // std::istream *m_conv_istream; |
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221 |
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222 std::ostream *m_conv_ostream; |
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223 |
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224 // TRUE if an error has occurred. |
27172 | 225 bool m_fail; |
2117 | 226 |
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227 // TRUE if this stream is open. |
27172 | 228 bool m_open_state; |
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229 |
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230 // Should contain error message if fail is TRUE. |
27172 | 231 std::string m_errmsg; |
2117 | 232 |
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233 // Functions that are defined for all input streams (input streams |
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234 // are those that define is). |
2117 | 235 |
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236 OCTINTERP_API std::string |
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237 do_gets (octave_idx_type max_len, bool& err, bool strip_newline, |
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238 const std::string& who /* = "gets" */); |
2117 | 239 |
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240 OCTINTERP_API std::string |
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241 getl (octave_idx_type max_len, bool& err, |
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242 const std::string& who /* = "getl" */); |
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243 OCTINTERP_API std::string |
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244 gets (octave_idx_type max_len, bool& err, |
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245 const std::string& who /* = "gets" */); |
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246 OCTINTERP_API off_t |
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247 skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
2117 | 248 |
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249 OCTINTERP_API octave_value |
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250 do_scanf (scanf_format_list& fmt_list, octave_idx_type nr, |
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251 octave_idx_type nc, bool one_elt_size_spec, |
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252 octave_idx_type& count, const std::string& who /* = "scanf" */); |
2117 | 253 |
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254 OCTINTERP_API octave_value |
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255 scanf (const std::string& fmt, const Array<double>& size, |
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256 octave_idx_type& count, const std::string& who /* = "scanf" */); |
2215 | 257 |
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258 OCTINTERP_API bool |
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259 do_oscanf (const scanf_format_elt *elt, octave_value&, |
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260 const std::string& who /* = "scanf" */); |
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261 |
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262 OCTINTERP_API octave_value_list |
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263 oscanf (const std::string& fmt, const std::string& who /* = "scanf" */); |
2117 | 264 |
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265 OCTINTERP_API octave_value |
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266 do_textscan (const std::string& fmt, octave_idx_type ntimes, |
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267 const octave_value_list& options, |
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268 const std::string& who, octave_idx_type& count); |
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269 |
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270 // Functions that are defined for all output streams (output streams |
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271 // are those that define os). |
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272 |
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273 OCTINTERP_API int flush (void); |
2117 | 274 |
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275 OCTINTERP_API int |
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276 do_numeric_printf_conv (std::ostream& os, const printf_format_elt *elt, |
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277 int nsa, int sa_1, int sa_2, |
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278 const octave_value& val, |
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279 const std::string& who); |
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280 |
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281 OCTINTERP_API void field_width_error (const std::string& who) const; |
2117 | 282 |
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283 OCTINTERP_API int |
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284 do_printf (printf_format_list& fmt_list, const octave_value_list& args, |
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285 const std::string& who /* = "printf" */); |
2117 | 286 |
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287 OCTINTERP_API int |
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288 printf (const std::string& fmt, const octave_value_list& args, |
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289 const std::string& who /* = "printf" */); |
2117 | 290 |
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291 OCTINTERP_API int |
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292 puts (const std::string& s, const std::string& who /* = "puts" */); |
2117 | 293 |
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294 // We can always do this in terms of seek(), so the derived class |
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295 // only has to provide that. |
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297 OCTINTERP_API void |
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298 invalid_operation (const std::string& who, const char *rw); |
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299 }; |
2117 | 300 |
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301 class |
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302 OCTINTERP_API |
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303 stream |
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304 { |
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305 public: |
2117 | 306 |
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307 // BS must be allocated with new or nullptr. |
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308 stream (base_stream *bs = nullptr) : m_rep (bs) { } |
2117 | 309 |
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310 stream (const stream&) = default; |
3340 | 311 |
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312 stream& operator = (const stream&) = default; |
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313 |
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314 ~stream (void) = default; |
2117 | 315 |
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316 OCTINTERP_API int flush (void); |
2117 | 317 |
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318 OCTINTERP_API std::string |
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319 getl (octave_idx_type max_len, bool& err, |
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320 const std::string& who /* = "getl" */); |
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321 |
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322 OCTINTERP_API std::string |
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323 getl (const octave_value& max_len, bool& err, |
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324 const std::string& who /* = "getl" */); |
2117 | 325 |
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326 OCTINTERP_API std::string |
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327 gets (octave_idx_type max_len, bool& err, |
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328 const std::string& who /* = "gets" */); |
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329 |
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330 OCTINTERP_API std::string |
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331 gets (const octave_value& max_len, bool& err, |
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332 const std::string& who /* = "gets" */); |
2117 | 333 |
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334 OCTINTERP_API off_t |
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335 skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
9701 | 336 |
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337 OCTINTERP_API off_t |
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338 skipl (const octave_value& count, bool& err, |
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339 const std::string& who /* = "skipl" */); |
2117 | 340 |
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341 OCTINTERP_API int seek (off_t offset, int origin); |
2117 | 342 |
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343 OCTINTERP_API int |
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344 seek (const octave_value& offset, const octave_value& origin); |
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345 |
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346 OCTINTERP_API off_t tell (void); |
2117 | 347 |
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348 OCTINTERP_API int rewind (void); |
3340 | 349 |
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350 OCTINTERP_API bool is_open (void) const; |
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351 |
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352 OCTINTERP_API void close (void); |
3340 | 353 |
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354 OCTINTERP_API octave_value |
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355 read (const Array<double>& size, octave_idx_type block_size, |
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356 oct_data_conv::data_type input_type, |
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357 oct_data_conv::data_type output_type, |
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358 octave_idx_type skip, mach_info::float_format flt_fmt, |
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359 octave_idx_type& count); |
2117 | 360 |
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361 OCTINTERP_API octave_idx_type |
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362 write (const octave_value& data, octave_idx_type block_size, |
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363 oct_data_conv::data_type output_type, |
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364 octave_idx_type skip, mach_info::float_format flt_fmt); |
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365 |
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366 OCTINTERP_API bool write_bytes (const void *data, std::size_t n_elts); |
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367 |
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368 OCTINTERP_API bool skip_bytes (std::size_t n_elts); |
4944 | 369 |
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370 template <typename T> |
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371 OCTINTERP_API octave_idx_type |
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372 write (const Array<T>& data, octave_idx_type block_size, |
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373 oct_data_conv::data_type output_type, |
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374 octave_idx_type skip, mach_info::float_format flt_fmt); |
2117 | 375 |
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376 OCTINTERP_API octave_value |
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377 scanf (const std::string& fmt, const Array<double>& size, |
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378 octave_idx_type& count, const std::string& who /* = "scanf" */); |
2117 | 379 |
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380 OCTINTERP_API octave_value |
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381 scanf (const octave_value& fmt, const Array<double>& size, |
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382 octave_idx_type& count, const std::string& who /* = "scanf" */); |
5279 | 383 |
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384 OCTINTERP_API octave_value_list |
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385 oscanf (const std::string& fmt, const std::string& who /* = "scanf" */); |
2215 | 386 |
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387 OCTINTERP_API octave_value_list |
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388 oscanf (const octave_value& fmt, const std::string& who /* = "scanf" */); |
5279 | 389 |
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390 OCTINTERP_API octave_value |
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391 textscan (const std::string& fmt, octave_idx_type ntimes, |
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392 const octave_value_list& options, |
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393 const std::string& who, octave_idx_type& count); |
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394 |
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395 OCTINTERP_API int |
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396 printf (const std::string& fmt, const octave_value_list& args, |
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397 const std::string& who /* = "printf" */); |
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398 |
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399 OCTINTERP_API int |
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400 printf (const octave_value& fmt, const octave_value_list& args, |
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401 const std::string& who /* = "printf" */); |
5279 | 402 |
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403 OCTINTERP_API int |
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404 puts (const std::string& s, const std::string& who /* = "puts" */); |
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405 OCTINTERP_API int |
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406 puts (const octave_value& s, const std::string& who /* = "puts" */); |
2117 | 407 |
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408 OCTINTERP_API bool eof (void) const; |
2117 | 409 |
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410 OCTINTERP_API std::string error (bool clear, int& err_num); |
2117 | 411 |
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412 std::string error (bool clear = false) |
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413 { |
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414 int err_num; |
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415 return error (clear, err_num); |
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416 } |
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417 |
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418 // Set the error message and state. |
2117 | 419 |
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420 void error (const std::string& msg) |
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421 { |
27172 | 422 if (m_rep) |
423 m_rep->error (msg); | |
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424 } |
4799 | 425 |
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426 void error (const char *msg) { error (std::string (msg)); } |
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427 |
27172 | 428 int file_number (void) { return m_rep ? m_rep->file_number () : -1; } |
4799 | 429 |
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430 bool is_valid (void) const { return bool (m_rep); } |
4799 | 431 |
27172 | 432 bool ok (void) const { return m_rep && m_rep->ok (); } |
3145 | 433 |
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434 operator bool () const { return ok (); } |
3340 | 435 |
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436 OCTINTERP_API std::string name (void) const; |
2117 | 437 |
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438 OCTINTERP_API int mode (void) const; |
2117 | 439 |
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440 OCTINTERP_API mach_info::float_format float_format (void) const; |
2117 | 441 |
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442 OCTINTERP_API static std::string mode_as_string (int mode); |
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443 |
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444 std::string encoding (void) |
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445 { |
27172 | 446 return m_rep ? m_rep->encoding () : std::string (); |
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447 } |
2117 | 448 |
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449 std::istream * input_stream (void) |
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450 { |
27172 | 451 return m_rep ? m_rep->input_stream () : nullptr; |
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452 } |
2117 | 453 |
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454 std::ostream * output_stream (void) |
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455 { |
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456 return (m_rep ? m_rep->preferred_output_stream () : nullptr); |
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457 } |
2902 | 458 |
27172 | 459 void clearerr (void) { if (m_rep) m_rep->clearerr (); } |
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460 |
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461 private: |
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462 |
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463 // The actual representation of this stream. |
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464 std::shared_ptr<base_stream> m_rep; |
4889 | 465 |
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466 bool stream_ok (bool clear = true) const |
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467 { |
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468 bool retval = true; |
2117 | 469 |
27172 | 470 if (m_rep) |
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471 { |
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472 if (clear) |
27172 | 473 m_rep->clear (); |
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474 } |
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475 else |
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476 retval = false; |
2117 | 477 |
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478 return retval; |
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479 } |
5659 | 480 |
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481 void invalid_operation (const std::string& who, const char *rw) |
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482 { |
27172 | 483 if (m_rep) |
484 m_rep->invalid_operation (who, rw); | |
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485 } |
5659 | 486 |
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487 OCTINTERP_API octave_value |
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488 finalize_read (std::list<void *>& input_buf_list, |
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489 octave_idx_type input_buf_elts, |
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490 octave_idx_type elts_read, |
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491 octave_idx_type nr, octave_idx_type nc, |
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492 oct_data_conv::data_type input_type, |
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493 oct_data_conv::data_type output_type, |
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494 mach_info::float_format ffmt); |
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495 }; |
4944 | 496 |
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497 class |
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498 OCTINTERP_API |
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499 stream_list |
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500 { |
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501 public: |
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502 |
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503 OCTINTERP_API stream_list (interpreter& interp); |
2117 | 504 |
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505 stream_list (const stream_list&) = delete; |
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506 stream_list& operator = (const stream_list&) = delete; |
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507 |
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508 OCTINTERP_API ~stream_list (void); |
2117 | 509 |
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510 OCTINTERP_API int insert (stream& os); |
2117 | 511 |
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512 OCTINTERP_API stream lookup (int fid, const std::string& who = "") const; |
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513 OCTINTERP_API stream |
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514 lookup (const octave_value& fid, const std::string& who = "") const; |
2117 | 515 |
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516 OCTINTERP_API int remove (int fid, const std::string& who = ""); |
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517 OCTINTERP_API int remove (const octave_value& fid, |
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518 const std::string& who = ""); |
2117 | 519 |
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520 OCTINTERP_API void clear (bool flush = true); |
4468 | 521 |
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522 OCTINTERP_API string_vector get_info (int fid) const; |
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523 OCTINTERP_API string_vector get_info (const octave_value& fid) const; |
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524 |
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525 OCTINTERP_API std::string list_open_files (void) const; |
2117 | 526 |
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527 OCTINTERP_API octave_value open_file_numbers (void) const; |
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528 |
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529 OCTINTERP_API int get_file_number (const octave_value& fid) const; |
2117 | 530 |
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531 OCTINTERP_API octave_value stdin_file (void) const; |
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532 OCTINTERP_API octave_value stdout_file (void) const; |
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533 OCTINTERP_API octave_value stderr_file (void) const; |
2117 | 534 |
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535 private: |
2117 | 536 |
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537 typedef std::map<int, stream> ostrl_map; |
2117 | 538 |
27172 | 539 ostrl_map m_list; |
2117 | 540 |
27172 | 541 mutable ostrl_map::const_iterator m_lookup_cache; |
2609 | 542 |
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543 int m_stdin_file; |
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544 int m_stdout_file; |
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545 int m_stderr_file; |
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546 }; |
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547 } |
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548 |
2117 | 549 #endif |