annotate libinterp/corefcn/oct-stdstrm.h @ 27919:1891570abac8

update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2020.
author John W. Eaton <jwe@octave.org>
date Mon, 06 Jan 2020 22:29:51 -0500
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1 /*
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2
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3 Copyright (C) 1996-2020 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 distribution
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6 or <https://octave.org/COPYRIGHT.html/>.
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7
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8
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9 This file is part of Octave.
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10
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11 Octave is free software: you can redistribute it and/or modify it
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12 under the terms of the GNU General Public License as published by
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13 the Free Software Foundation, either version 3 of the License, or
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14 (at your option) any later version.
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15
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16 Octave is distributed in the hope that it will be useful, but
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17 WITHOUT ANY WARRANTY; without even the implied warranty of
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 GNU General Public License for more details.
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20
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21 You should have received a copy of the GNU General Public License
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22 along with Octave; see the file COPYING. If not, see
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23 <https://www.gnu.org/licenses/>.
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25 */
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26
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27 #if ! defined (octave_oct_stdstrm_h)
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28 #define octave_oct_stdstrm_h 1
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29
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30 #include "octave-config.h"
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31
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32 #include <iomanip>
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33
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34 #include "oct-stream.h"
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35 #include "c-file-ptr-stream.h"
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36
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37 template <typename BUF_T, typename STREAM_T, typename FILE_T>
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38 class
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39 octave_tstdiostream : public octave::base_stream
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40 {
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41 public:
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42
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43 octave_tstdiostream (const std::string& n, FILE_T f = 0, int fid = 0,
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44 std::ios::openmode m = std::ios::in | std::ios::out,
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45 octave::mach_info::float_format ff
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46 = octave::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 : octave::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), fnum (fid)
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51 { }
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52
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53 // No copying!
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54
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55 octave_tstdiostream (const octave_tstdiostream&) = delete;
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56
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57 octave_tstdiostream& operator = (const octave_tstdiostream&) = delete;
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58
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59 // Position a stream at OFFSET relative to ORIGIN.
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60
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61 int seek (off_t offset, int origin)
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62 {
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63 return m_stream ? m_stream->seek (offset, origin) : -1;
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64 }
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65
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66 // Return current stream position.
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67
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68 off_t tell (void) { return m_stream ? m_stream->tell () : -1; }
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69
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70 // Return nonzero if EOF has been reached on this stream.
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71
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72 bool eof (void) const { return m_stream ? m_stream->eof () : true; }
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73
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74 // The name of the file.
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75
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76 std::string name (void) const { return m_name; }
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78 std::istream * input_stream (void)
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79 {
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80 return (m_mode & std::ios::in) ? m_stream : nullptr;
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81 }
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83 std::ostream * output_stream (void)
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84 {
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85 return (m_mode & std::ios::out) ? m_stream : nullptr;
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86 }
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87
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88 // FIXME: should not have to cast away const here.
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89 BUF_T * rdbuf (void) const
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90 {
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91 return m_stream ? (const_cast<STREAM_T *> (m_stream))->rdbuf () : nullptr;
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92 }
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93
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94 int file_number (void) const { return fnum; }
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95
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96 bool bad (void) const { return m_stream ? m_stream->bad () : true; }
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98 void clear (void)
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99 {
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100 if (m_stream)
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101 m_stream->clear ();
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102 }
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103
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104 void do_close (void)
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105 {
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106 if (m_stream)
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107 m_stream->stream_close ();
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108 }
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109
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110 protected:
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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 fnum;
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120
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121 ~octave_tstdiostream (void) { delete m_stream; }
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122 };
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123
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124 class
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125 octave_stdiostream
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126 : public octave_tstdiostream<c_file_ptr_buf, io_c_file_ptr_stream, FILE *>
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127 {
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128 public:
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129
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130 octave_stdiostream (const std::string& n, FILE *f = nullptr,
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131 std::ios::openmode m = std::ios::in | std::ios::out,
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132 octave::mach_info::float_format ff
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133 = octave::mach_info::native_float_format (),
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134 const std::string& encoding = "utf-8",
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135 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::file_close)
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136 : octave_tstdiostream<c_file_ptr_buf, io_c_file_ptr_stream, FILE *>
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137 (n, f, f ? fileno (f) : -1, m, ff, encoding, cf) { }
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138
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139 static octave::stream
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140 create (const std::string& n, FILE *f = nullptr,
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141 std::ios::openmode m = std::ios::in | std::ios::out,
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142 octave::mach_info::float_format ff
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143 = octave::mach_info::native_float_format (),
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144 const std::string& encoding = "utf-8",
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145 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::file_close)
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146 {
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147 return octave::stream (new octave_stdiostream (n, f, m, ff, encoding, cf));
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148 }
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149
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150 // No copying!
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151
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152 octave_stdiostream (const octave_stdiostream&) = delete;
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153
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154 octave_stdiostream& operator = (const octave_stdiostream&) = delete;
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155
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156 protected:
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157
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158 ~octave_stdiostream (void) = default;
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159 };
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160
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161 #if defined (HAVE_ZLIB)
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162
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163 class
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164 octave_zstdiostream
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165 : public octave_tstdiostream<c_zfile_ptr_buf, io_c_zfile_ptr_stream, gzFile>
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166 {
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167 public:
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168
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169 octave_zstdiostream (const std::string& n, gzFile f = nullptr, int fid = 0,
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170 std::ios::openmode m = std::ios::in | std::ios::out,
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171 octave::mach_info::float_format ff
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172 = octave::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
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175 = c_zfile_ptr_buf::file_close)
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176 : octave_tstdiostream<c_zfile_ptr_buf, io_c_zfile_ptr_stream, gzFile>
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177 (n, f, fid, m, ff, encoding, cf) { }
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178
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179 static octave::stream
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180 create (const std::string& n, gzFile f = nullptr, int fid = 0,
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181 std::ios::openmode m = std::ios::in | std::ios::out,
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182 octave::mach_info::float_format ff
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183 = octave::mach_info::native_float_format (),
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184 const std::string& encoding = "utf-8",
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185 c_zfile_ptr_buf::close_fcn cf = c_zfile_ptr_buf::file_close)
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186 {
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187 return octave::stream (new octave_zstdiostream (n, f, fid, m, ff, encoding,
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188 cf));
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189 }
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190
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191 // No copying!
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192
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193 octave_zstdiostream (const octave_zstdiostream&) = delete;
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194
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195 octave_zstdiostream& operator = (const octave_zstdiostream&) = delete;
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196
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197 protected:
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198
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199 ~octave_zstdiostream (void) = default;
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200 };
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201
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202 #endif
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203
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204 #endif