annotate libinterp/corefcn/oct-stdstrm.h @ 31608:23664317f0d3

maint: merge stable to default
author Rik <rik@octave.org>
date Thu, 01 Dec 2022 20:05:44 -0800
parents dfa5d9c3ae72 aac27ad79be6
children 5f11de0e7440
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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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 // No copying!
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54
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55 tstdiostream (const tstdiostream&) = delete;
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56
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57 tstdiostream& operator = (const 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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82
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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 m_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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97
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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 ~tstdiostream (void) { delete m_stream; }
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113
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114 //--------
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115
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116 std::string m_name;
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117
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118 std::ios::openmode m_mode;
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119
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120 STREAM_T *m_stream;
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121
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122 // The file number associated with this file.
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123 int m_fnum;
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124 };
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125
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126 class
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127 stdiostream
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128 : public tstdiostream<c_file_ptr_buf, io_c_file_ptr_stream, FILE *>
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129 {
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130 public:
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131
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132 stdiostream (const std::string& n, FILE *f = nullptr,
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133 std::ios::openmode m = std::ios::in | std::ios::out,
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134 mach_info::float_format ff = mach_info::native_float_format (),
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135 const std::string& encoding = "utf-8",
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136 c_file_ptr_buf::close_fcn cf = c_file_ptr_buf::file_close)
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137 : tstdiostream<c_file_ptr_buf, io_c_file_ptr_stream, FILE *>
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138 (n, f, f ? fileno (f) : -1, m, ff, encoding, cf) { }
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139
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140 static stream
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141 create (const std::string& n, FILE *f = nullptr,
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142 std::ios::openmode m = std::ios::in | std::ios::out,
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143 mach_info::float_format ff = 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 stream (new 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 stdiostream (const stdiostream&) = delete;
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153
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154 stdiostream& operator = (const stdiostream&) = delete;
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155
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156 protected:
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157
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158 ~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 zstdiostream
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165 : public 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 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 mach_info::float_format ff = mach_info::native_float_format (),
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172 const std::string& encoding = "utf-8",
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173 c_zfile_ptr_buf::close_fcn cf = c_zfile_ptr_buf::file_close)
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174 : tstdiostream<c_zfile_ptr_buf, io_c_zfile_ptr_stream, gzFile>
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175 (n, f, fid, m, ff, encoding, cf) { }
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176
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177 static stream
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178 create (const std::string& n, gzFile f = nullptr, int fid = 0,
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179 std::ios::openmode m = std::ios::in | std::ios::out,
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180 mach_info::float_format ff = mach_info::native_float_format (),
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181 const std::string& encoding = "utf-8",
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182 c_zfile_ptr_buf::close_fcn cf = c_zfile_ptr_buf::file_close)
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183 {
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184 return stream (new zstdiostream (n, f, fid, m, ff, encoding, cf));
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185 }
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186
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187 // No copying!
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188
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189 zstdiostream (const zstdiostream&) = delete;
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190
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191 zstdiostream& operator = (const zstdiostream&) = delete;
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192
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193 protected:
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194
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195 ~zstdiostream (void) = default;
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196 };
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197
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198 #endif
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199
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200 OCTAVE_END_NAMESPACE(octave)
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201
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202 #endif