Mercurial > octave
annotate libinterp/corefcn/oct-stream.h @ 23059:b98ebcd7f11c
move some octave stream classes into octave namespace
* oct-stream.h, oct-stream.cc (base_stream, stream, stream_list):
Move inside octave namespace and rename without octave_ prefix.
Change all uses.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 17 Jan 2017 13:56:16 -0500 |
parents | 27e4ec3b0b49 |
children | ef4d915df748 |
rev | line source |
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2117 | 1 /* |
2 | |
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3 Copyright (C) 1996-2016 John W. Eaton |
2117 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
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8 under the terms of the GNU General Public License as published by |
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9 the Free Software Foundation; either version 3 of the License, or |
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10 (at your option) any later version. |
2117 | 11 |
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12 Octave is distributed in the hope that it will be useful, but |
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13 WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 GNU General Public License for more details. |
2117 | 16 |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
2117 | 20 |
21 */ | |
22 | |
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23 #if ! defined (octave_oct_stream_h) |
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24 #define octave_oct_stream_h 1 |
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26 #include "octave-config.h" |
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27 |
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28 #include <ios> |
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29 #include <iosfwd> |
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30 #include <list> |
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31 #include <map> |
2877 | 32 #include <string> |
2117 | 33 |
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34 // These only appear as reference arguments or return values. |
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35 |
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36 template <typename T> class Array; |
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37 class Cell; |
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38 class octave_value; |
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39 class octave_value_list; |
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40 class string_vector; |
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41 |
2317 | 42 #include "data-conv.h" |
43 #include "mach-info.h" | |
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44 #include "oct-refcount.h" |
2117 | 45 |
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46 namespace octave |
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47 { |
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48 // These are only needed as arguments to private functions, so they |
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49 // are also treated as private. |
2117 | 50 |
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51 class scanf_format_elt; |
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52 class scanf_format_list; |
2117 | 53 |
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54 class printf_format_elt; |
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55 class printf_format_list; |
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56 |
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57 // Provide an interface for Octave streams. |
2117 | 58 |
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59 class |
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60 OCTINTERP_API |
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61 base_stream |
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62 { |
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63 friend class stream; |
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64 |
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65 public: |
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66 |
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67 base_stream (std::ios::openmode arg_md = std::ios::in | std::ios::out, |
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68 mach_info::float_format ff = mach_info::native_float_format ()) |
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69 : count (0), md (arg_md), flt_fmt (ff), fail (false), open_state (true), |
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70 errmsg () |
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71 { } |
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72 |
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73 // No copying! |
2117 | 74 |
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75 base_stream (const base_stream&) = delete; |
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76 |
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77 base_stream& operator = (const base_stream&) = delete; |
2117 | 78 |
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79 virtual ~base_stream (void) = default; |
2117 | 80 |
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81 // The remaining functions are not specific to input or output only, |
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82 // and must be provided by the derived classes. |
2117 | 83 |
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84 // Position a stream at OFFSET relative to ORIGIN. |
2117 | 85 |
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86 virtual int seek (off_t offset, int origin) = 0; |
2117 | 87 |
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88 // Return current stream position. |
2117 | 89 |
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90 virtual off_t tell (void) = 0; |
2117 | 91 |
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92 // Return TRUE if EOF has been reached on this stream. |
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93 |
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94 virtual bool eof (void) const = 0; |
2117 | 95 |
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96 // The name of the file. |
2117 | 97 |
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98 virtual std::string name (void) const = 0; |
2117 | 99 |
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100 // If the derived class provides this function and it returns a |
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101 // pointer to a valid istream, scanf(), read(), getl(), and gets() |
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102 // will automatically work for this stream. |
2117 | 103 |
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104 virtual std::istream *input_stream (void) { return 0; } |
2117 | 105 |
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106 // If the derived class provides this function and it returns a |
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107 // pointer to a valid ostream, flush(), write(), and printf() will |
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108 // automatically work for this stream. |
3340 | 109 |
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110 virtual std::ostream *output_stream (void) { return 0; } |
3652 | 111 |
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112 // Return TRUE if this stream is open. |
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113 |
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114 bool is_open (void) const { return open_state; } |
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115 |
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116 virtual void do_close (void) { } |
3340 | 117 |
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118 void close (void) |
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119 { |
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120 if (is_open ()) |
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121 { |
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122 open_state = false; |
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123 do_close (); |
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124 } |
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125 } |
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126 |
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127 virtual int file_number (void) const |
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128 { |
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129 // Kluge alert! |
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131 if (name () == "stdin") |
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132 return 0; |
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133 else if (name () == "stdout") |
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134 return 1; |
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135 else if (name () == "stderr") |
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136 return 2; |
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137 else |
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138 return -1; |
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139 } |
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141 bool ok (void) const { return ! fail; } |
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143 // Return current error message for this stream. |
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145 std::string error (bool clear, int& err_num); |
2117 | 146 |
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147 protected: |
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149 int mode (void) const { return md; } |
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151 mach_info::float_format float_format (void) const { return flt_fmt; } |
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153 // Set current error state and set fail to TRUE. |
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155 void error (const std::string& msg); |
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156 void error (const std::string& who, const std::string& msg); |
2117 | 157 |
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158 // Clear any error message and set fail to FALSE. |
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160 void clear (void); |
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161 |
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162 // Clear stream state. |
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164 void clearerr (void); |
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166 private: |
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168 // A reference count. |
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169 refcount<octave_idx_type> count; |
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171 // The permission bits for the file. Should be some combination of |
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172 // std::ios::open_mode bits. |
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173 int md; |
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175 // Data format. |
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176 mach_info::float_format flt_fmt; |
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178 // TRUE if an error has occurred. |
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179 bool fail; |
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181 // TRUE if this stream is open. |
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182 bool open_state; |
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183 |
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184 // Should contain error message if fail is TRUE. |
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185 std::string errmsg; |
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187 // Functions that are defined for all input streams (input streams |
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188 // are those that define is). |
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190 std::string do_gets (octave_idx_type max_len, bool& err, bool strip_newline, |
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191 const std::string& who /* = "gets" */); |
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193 std::string getl (octave_idx_type max_len, bool& err, |
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194 const std::string& who /* = "getl" */); |
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195 std::string gets (octave_idx_type max_len, bool& err, |
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196 const std::string& who /* = "gets" */); |
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197 off_t skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
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199 octave_value do_scanf (scanf_format_list& fmt_list, octave_idx_type nr, |
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200 octave_idx_type nc, |
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201 bool one_elt_size_spec, octave_idx_type& count, |
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202 const std::string& who /* = "scanf" */); |
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204 octave_value scanf (const std::string& fmt, const Array<double>& size, |
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205 octave_idx_type& count, const std::string& who /* = "scanf" */); |
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207 bool do_oscanf (const scanf_format_elt *elt, octave_value&, |
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208 const std::string& who /* = "scanf" */); |
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210 octave_value_list oscanf (const std::string& fmt, |
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211 const std::string& who /* = "scanf" */); |
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212 |
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213 octave_value do_textscan (const std::string& fmt, octave_idx_type ntimes, |
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214 const octave_value_list& options, |
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215 const std::string& who, octave_idx_type& count); |
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217 // Functions that are defined for all output streams (output streams |
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218 // are those that define os). |
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219 |
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220 int flush (void); |
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222 int do_numeric_printf_conv (std::ostream& os, const printf_format_elt *elt, |
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223 int nsa, int sa_1, int sa_2, |
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224 const octave_value& val, |
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225 const std::string& who); |
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226 |
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227 int do_printf (printf_format_list& fmt_list, const octave_value_list& args, |
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228 const std::string& who /* = "printf" */); |
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230 int printf (const std::string& fmt, const octave_value_list& args, |
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231 const std::string& who /* = "printf" */); |
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233 int puts (const std::string& s, const std::string& who /* = "puts" */); |
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235 // We can always do this in terms of seek(), so the derived class |
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236 // only has to provide that. |
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238 void invalid_operation (const std::string& who, const char *rw); |
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239 }; |
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241 class |
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242 OCTINTERP_API |
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243 stream |
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244 { |
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245 public: |
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247 stream (base_stream *bs = 0); |
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249 ~stream (void); |
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251 stream (const stream&); |
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253 stream& operator = (const stream&); |
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255 int flush (void); |
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257 std::string getl (octave_idx_type max_len, bool& err, |
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258 const std::string& who /* = "getl" */); |
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259 std::string getl (const octave_value& max_len, bool& err, |
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260 const std::string& who /* = "getl" */); |
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262 std::string gets (octave_idx_type max_len, bool& err, |
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263 const std::string& who /* = "gets" */); |
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264 std::string gets (const octave_value& max_len, bool& err, |
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265 const std::string& who /* = "gets" */); |
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267 off_t skipl (off_t count, bool& err, const std::string& who /* = "skipl" */); |
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268 off_t skipl (const octave_value& count, bool& err, |
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269 const std::string& who /* = "skipl" */); |
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271 int seek (off_t offset, int origin); |
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272 int seek (const octave_value& offset, const octave_value& origin); |
2117 | 273 |
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274 off_t tell (void); |
2117 | 275 |
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276 int rewind (void); |
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278 bool is_open (void) const; |
3340 | 279 |
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280 void close (void); |
3340 | 281 |
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282 octave_value read (const Array<double>& size, octave_idx_type block_size, |
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283 oct_data_conv::data_type input_type, |
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284 oct_data_conv::data_type output_type, |
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285 octave_idx_type skip, mach_info::float_format flt_fmt, |
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286 octave_idx_type& count); |
2117 | 287 |
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288 octave_idx_type write (const octave_value& data, octave_idx_type block_size, |
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289 oct_data_conv::data_type output_type, |
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290 octave_idx_type skip, |
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291 mach_info::float_format flt_fmt); |
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292 |
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293 bool write_bytes (const void *data, size_t n_elts); |
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294 |
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295 bool skip_bytes (size_t n_elts); |
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297 template <typename T> |
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298 octave_idx_type write (const Array<T>& data, octave_idx_type block_size, |
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299 oct_data_conv::data_type output_type, |
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300 octave_idx_type skip, |
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301 mach_info::float_format flt_fmt); |
2117 | 302 |
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303 octave_value scanf (const std::string& fmt, const Array<double>& size, |
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304 octave_idx_type& count, const std::string& who /* = "scanf" */); |
2117 | 305 |
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306 octave_value scanf (const octave_value& fmt, const Array<double>& size, |
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307 octave_idx_type& count, const std::string& who /* = "scanf" */); |
5279 | 308 |
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309 octave_value_list oscanf (const std::string& fmt, |
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310 const std::string& who /* = "scanf" */); |
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312 octave_value_list oscanf (const octave_value& fmt, |
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313 const std::string& who /* = "scanf" */); |
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315 octave_value textscan (const std::string& fmt, octave_idx_type ntimes, |
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316 const octave_value_list& options, |
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317 const std::string& who, octave_idx_type& count); |
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318 |
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319 int printf (const std::string& fmt, const octave_value_list& args, |
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320 const std::string& who /* = "printf" */); |
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321 |
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322 int printf (const octave_value& fmt, const octave_value_list& args, |
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323 const std::string& who /* = "printf" */); |
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325 int puts (const std::string& s, const std::string& who /* = "puts" */); |
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326 int puts (const octave_value& s, const std::string& who /* = "puts" */); |
2117 | 327 |
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328 bool eof (void) const; |
2117 | 329 |
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330 std::string error (bool clear, int& err_num); |
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332 std::string error (bool clear = false) |
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333 { |
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334 int err_num; |
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335 return error (clear, err_num); |
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336 } |
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337 |
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338 // Set the error message and state. |
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340 void error (const std::string& msg) |
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341 { |
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342 if (rep) |
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343 rep->error (msg); |
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344 } |
4799 | 345 |
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346 void error (const char *msg) { error (std::string (msg)); } |
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347 |
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348 int file_number (void) { return rep ? rep->file_number () : -1; } |
4799 | 349 |
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350 bool is_valid (void) const { return (rep != 0); } |
4799 | 351 |
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352 bool ok (void) const { return rep && rep->ok (); } |
3145 | 353 |
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354 operator bool () const { return ok (); } |
3340 | 355 |
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356 std::string name (void) const; |
2117 | 357 |
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358 int mode (void) const; |
2117 | 359 |
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360 mach_info::float_format float_format (void) const; |
2117 | 361 |
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362 static std::string mode_as_string (int mode); |
2117 | 363 |
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364 std::istream *input_stream (void) |
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365 { |
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366 return rep ? rep->input_stream () : 0; |
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367 } |
2117 | 368 |
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369 std::ostream *output_stream (void) |
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370 { |
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371 return rep ? rep->output_stream () : 0; |
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372 } |
2902 | 373 |
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374 void clearerr (void) { if (rep) rep->clearerr (); } |
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375 |
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376 private: |
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377 |
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378 // The actual representation of this stream. |
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379 base_stream *rep; |
4889 | 380 |
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381 bool stream_ok (bool clear = true) const |
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382 { |
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383 bool retval = true; |
2117 | 384 |
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385 if (rep) |
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386 { |
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387 if (clear) |
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388 rep->clear (); |
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389 } |
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390 else |
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391 retval = false; |
2117 | 392 |
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393 return retval; |
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394 } |
5659 | 395 |
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396 void invalid_operation (const std::string& who, const char *rw) |
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397 { |
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398 if (rep) |
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399 rep->invalid_operation (who, rw); |
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400 } |
5659 | 401 |
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402 octave_value |
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403 finalize_read (std::list<void *>& input_buf_list, |
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404 octave_idx_type input_buf_elts, |
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405 octave_idx_type elts_read, |
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406 octave_idx_type nr, octave_idx_type nc, |
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407 oct_data_conv::data_type input_type, |
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408 oct_data_conv::data_type output_type, |
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409 mach_info::float_format ffmt); |
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410 }; |
4944 | 411 |
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412 class |
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413 OCTINTERP_API |
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414 stream_list |
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415 { |
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416 protected: |
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417 |
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418 stream_list (void) : list (), lookup_cache (list.end ()) { } |
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419 |
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420 public: |
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421 |
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422 ~stream_list (void) = default; |
2117 | 423 |
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424 static bool instance_ok (void); |
2117 | 425 |
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426 static int insert (stream& os); |
2117 | 427 |
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428 static stream lookup (int fid, const std::string& who = ""); |
2117 | 429 |
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430 static stream lookup (const octave_value& fid, const std::string& who = ""); |
2117 | 431 |
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432 static int remove (int fid, const std::string& who = ""); |
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433 static int remove (const octave_value& fid, const std::string& who = ""); |
4468 | 434 |
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435 static void clear (bool flush = true); |
2117 | 436 |
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437 static string_vector get_info (int fid); |
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438 static string_vector get_info (const octave_value& fid); |
2117 | 439 |
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440 static std::string list_open_files (void); |
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441 |
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442 static octave_value open_file_numbers (void); |
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443 |
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444 static int get_file_number (const octave_value& fid); |
2117 | 445 |
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446 private: |
2117 | 447 |
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448 typedef std::map<int, stream> ostrl_map; |
2117 | 449 |
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450 ostrl_map list; |
2117 | 451 |
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452 mutable ostrl_map::const_iterator lookup_cache; |
2609 | 453 |
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454 static stream_list *instance; |
2117 | 455 |
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456 static void cleanup_instance (void) { delete instance; instance = 0; } |
2117 | 457 |
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458 int do_insert (stream& os); |
2117 | 459 |
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460 stream do_lookup (int fid, const std::string& who = "") const; |
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461 stream do_lookup (const octave_value& fid, |
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462 const std::string& who = "") const; |
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463 |
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464 int do_remove (int fid, const std::string& who = ""); |
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465 int do_remove (const octave_value& fid, const std::string& who = ""); |
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466 |
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467 void do_clear (bool flush = true); |
2117 | 468 |
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469 string_vector do_get_info (int fid) const; |
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470 string_vector do_get_info (const octave_value& fid) const; |
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471 |
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472 std::string do_list_open_files (void) const; |
2117 | 473 |
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474 octave_value do_open_file_numbers (void) const; |
2117 | 475 |
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476 int do_get_file_number (const octave_value& fid) const; |
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477 }; |
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478 } |
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479 |
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480 #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS) |
2117 | 481 |
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482 OCTAVE_DEPRECATED ("use 'octave::base_stream' instead") |
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483 typedef octave::base_stream octave_base_stream; |
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485 OCTAVE_DEPRECATED ("use 'octave::stream' instead") |
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486 typedef octave::stream octave_stream; |
2117 | 487 |
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488 OCTAVE_DEPRECATED ("use 'octave::stream_list' instead") |
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489 typedef octave::stream_list octave_stream_list; |
2117 | 490 |
491 #endif | |
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492 |
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493 #endif |