annotate libinterp/corefcn/oct-stdstrm.h @ 33658:b1d6e40ac737 stable tip

NEWS.9.md: Fix typo and minor formatting changes. * etc/NEWS.9.md: Fix typo. Adjust whitespace. Use markdown syntax for code snippets.
author Markus Mützel <markus.muetzel@gmx.de>
date Wed, 05 Jun 2024 11:27:35 +0200
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children 4b601ca024d5
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2024 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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25
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26 #if ! defined (octave_oct_stdstrm_h)
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27 #define octave_oct_stdstrm_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <iomanip>
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32
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33 #include "oct-stream.h"
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34 #include "c-file-ptr-stream.h"
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35
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36 OCTAVE_BEGIN_NAMESPACE(octave)
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37
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38 template <typename BUF_T, typename STREAM_T, typename FILE_T>
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39 class
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40 tstdiostream : public base_stream
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41 {
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42 public:
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43
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44 tstdiostream (const std::string& n, FILE_T f = 0, int fid = 0,
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45 std::ios::openmode m = std::ios::in | std::ios::out,
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46 mach_info::float_format ff = mach_info::native_float_format (),
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47 const std::string& encoding = "utf-8",
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48 typename BUF_T::close_fcn cf = BUF_T::file_close)
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49 : base_stream (m, ff, encoding), m_name (n), m_mode (m),
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50 m_stream (f ? new STREAM_T (f, cf) : nullptr), m_fnum (fid)
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51 { }
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52
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53 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (tstdiostream)
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54
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55 // Position a stream at OFFSET relative to ORIGIN.
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56
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57 int seek (off_t offset, int origin)
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58 {
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59 return m_stream ? m_stream->seek (offset, origin) : -1;
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60 }
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61
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62 // Return current stream position.
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63
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64 off_t tell () { return m_stream ? m_stream->tell () : -1; }
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65
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66 // Return nonzero if EOF has been reached on this stream.
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67
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68 bool eof () const { return m_stream ? m_stream->eof () : true; }
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69
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70 // The name of the file.
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71
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72 std::string name () const { return m_name; }
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73
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74 std::istream * input_stream ()
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75 {
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76 return (m_mode & std::ios::in) ? m_stream : nullptr;
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77 }
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78
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79 std::ostream * output_stream ()
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80 {
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81 return (m_mode & std::ios::out) ? m_stream : nullptr;
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82 }
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83
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84 // FIXME: should not have to cast away const here.
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85 BUF_T * rdbuf () const
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86 {
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87 return m_stream ? (const_cast<STREAM_T *> (m_stream))->rdbuf () : nullptr;
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88 }
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89
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90 int file_number () const { return m_fnum; }
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91
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92 bool bad () const { return m_stream ? m_stream->bad () : true; }
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93
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94 void clear ()
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95 {
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96 if (m_stream)
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97 m_stream->clear ();
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98 }
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99
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100 void do_close ()
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101 {
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102 if (m_stream)
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103 m_stream->stream_close ();
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104 }
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105
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106 protected:
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107
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108 ~tstdiostream () { delete m_stream; }
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109
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110 //--------
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111
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112 std::string m_name;
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113
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114 std::ios::openmode m_mode;
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115
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116 STREAM_T *m_stream;
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117
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118 // The file number associated with this file.
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119 int m_fnum;
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120 };
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121
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122 class
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123 stdiostream
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124 : public tstdiostream<c_file_ptr_buf, io_c_file_ptr_stream, FILE *>
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125 {
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126 public:
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127
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128 stdiostream (const std::string& n, FILE *f = nullptr,
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129 std::ios::openmode m = std::ios::in | std::ios::out,
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130 mach_info::float_format ff = mach_info::native_float_format (),
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131 const std::string& encoding = "utf-8",
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132 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::file_close)
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133 : tstdiostream<c_file_ptr_buf, io_c_file_ptr_stream, FILE *>
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134 (n, f, f ? fileno (f) : -1, m, ff, encoding, cf) { }
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135
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136 static stream
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137 create (const std::string& n, FILE *f = nullptr,
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138 std::ios::openmode m = std::ios::in | std::ios::out,
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139 mach_info::float_format ff = mach_info::native_float_format (),
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140 const std::string& encoding = "utf-8",
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141 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::file_close)
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142 {
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143 return stream (new stdiostream (n, f, m, ff, encoding, cf));
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144 }
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145
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146 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (stdiostream)
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147
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148 protected:
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149
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150 ~stdiostream () = default;
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151 };
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152
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153 #if defined (HAVE_ZLIB)
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154
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155 class
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156 zstdiostream
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157 : public tstdiostream<c_zfile_ptr_buf, io_c_zfile_ptr_stream, gzFile>
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158 {
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159 public:
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160
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161 zstdiostream (const std::string& n, gzFile f = nullptr, int fid = 0,
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162 std::ios::openmode m = std::ios::in | std::ios::out,
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163 mach_info::float_format ff = mach_info::native_float_format (),
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164 const std::string& encoding = "utf-8",
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165 c_zfile_ptr_buf::close_fcn cf = c_zfile_ptr_buf::file_close)
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166 : tstdiostream<c_zfile_ptr_buf, io_c_zfile_ptr_stream, gzFile>
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167 (n, f, fid, m, ff, encoding, cf) { }
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168
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169 static stream
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170 create (const std::string& n, gzFile f = nullptr, int fid = 0,
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171 std::ios::openmode m = std::ios::in | std::ios::out,
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172 mach_info::float_format ff = mach_info::native_float_format (),
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173 const std::string& encoding = "utf-8",
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174 c_zfile_ptr_buf::close_fcn cf = c_zfile_ptr_buf::file_close)
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175 {
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176 return stream (new zstdiostream (n, f, fid, m, ff, encoding, cf));
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177 }
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178
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179 OCTAVE_DISABLE_CONSTRUCT_COPY_MOVE (zstdiostream)
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180
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181 protected:
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182
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183 ~zstdiostream () = default;
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184 };
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185
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186 #endif
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187
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188 OCTAVE_END_NAMESPACE(octave)
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189
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190 #endif