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annotate libinterp/corefcn/oct-strstrm.h @ 23220:092078913d54

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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Wed, 22 Feb 2017 12:58:07 -0500
parents ef4d915df748 3ac9f9ecfae5
children cd4e1ee28716
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1 /*
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2
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3 Copyright (C) 1996-2017 John W. Eaton
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4
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5 This file is part of Octave.
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6
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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.
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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.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if ! defined (octave_oct_strstrm_h)
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24 #define octave_oct_strstrm_h 1
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25
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26 #include "octave-config.h"
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27
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28 #include <string>
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29 #include <sstream>
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31 #include "oct-stream.h"
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32
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33 class
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34 octave_base_strstream : public octave::base_stream
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35 {
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36 public:
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37
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38 octave_base_strstream (std::ios::openmode m = std::ios::out,
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39 octave::mach_info::float_format ff
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40 = octave::mach_info::native_float_format ())
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41 : octave::base_stream (m, ff) { }
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42
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43 // No copying!
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44
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45 octave_base_strstream (const octave_base_strstream&) = delete;
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46
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47 octave_base_strstream& operator = (const octave_base_strstream&) = delete;
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48
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49 protected:
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50
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51 ~octave_base_strstream (void) = default;
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52
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53 public:
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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, int);
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58
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59 // Return current stream position.
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60
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61 virtual off_t tell (void);
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62
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63 // The name of the file.
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64
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65 std::string name (void) const { return ""; }
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66
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67 virtual std::streambuf *rdbuf (void) = 0;
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68
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69 virtual bool bad (void) const = 0;
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70
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71 virtual void clear (void) = 0;
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72 };
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73
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74 class
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75 octave_istrstream : public octave_base_strstream
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76 {
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77 public:
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78
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79 octave_istrstream (const char *data,
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80 std::ios::openmode arg_md = std::ios::out,
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81 octave::mach_info::float_format ff
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82 = octave::mach_info::native_float_format ())
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83 : octave_base_strstream (arg_md, ff), is (data) { }
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84
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85 octave_istrstream (const std::string& data,
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86 std::ios::openmode arg_md = std::ios::out,
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87 octave::mach_info::float_format ff
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88 = octave::mach_info::native_float_format ())
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89 : octave_base_strstream (arg_md, ff), is (data.c_str ()) { }
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91 // No copying!
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92
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93 octave_istrstream (const octave_istrstream&) = delete;
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94
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95 octave_istrstream& operator = (const octave_istrstream&) = delete;
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96
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97 protected:
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98
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99 ~octave_istrstream (void) = default;
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100
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101 public:
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102
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103
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104 static octave::stream
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105 create (const char *data, std::ios::openmode arg_md = std::ios::out,
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106 octave::mach_info::float_format ff
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107 = octave::mach_info::native_float_format ());
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108
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109 static octave::stream
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110 create (const std::string& data, std::ios::openmode arg_md = std::ios::out,
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111 octave::mach_info::float_format ff
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112 = octave::mach_info::native_float_format ());
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113
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114 // Return nonzero if EOF has been reached on this stream.
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115
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116 bool eof (void) const { return is.eof (); }
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117
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118 std::istream *input_stream (void) { return &is; }
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119
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120 std::ostream *output_stream (void) { return 0; }
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121
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122 off_t tell (void) { return is.tellg (); }
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123
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124 std::streambuf *rdbuf (void) { return is ? is.rdbuf () : 0; }
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125
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126 bool bad (void) const { return is.bad (); }
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127
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128 void clear (void) { is.clear (); }
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129
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130 private:
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131
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132 std::istringstream is;
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133 };
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134
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135 class
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136 octave_ostrstream : public octave_base_strstream
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137 {
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138 public:
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139
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140 octave_ostrstream (std::ios::openmode arg_md = std::ios::out,
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141 octave::mach_info::float_format ff
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142 = octave::mach_info::native_float_format ())
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143 : octave_base_strstream (arg_md, ff), os () { }
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144
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145 // No copying!
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146
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147 octave_ostrstream (const octave_ostrstream&) = delete;
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148
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149 octave_ostrstream& operator = (const octave_ostrstream&) = delete;
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150
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151 protected:
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152
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153 ~octave_ostrstream (void) = default;
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154
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155 public:
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156
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157 static octave::stream
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158 create (std::ios::openmode arg_md = std::ios::out,
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159 octave::mach_info::float_format ff
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160 = octave::mach_info::native_float_format ());
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161
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162 // Return nonzero if EOF has been reached on this stream.
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163
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164 bool eof (void) const { return os.eof (); }
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165
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166 std::istream *input_stream (void) { return 0; }
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167
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168 std::ostream *output_stream (void) { return &os; }
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169
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170 std::string str (void) { return os.str (); }
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171
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172 std::streambuf *rdbuf (void) { return os ? os.rdbuf () : 0; }
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173
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174 bool bad (void) const { return os.bad (); }
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175
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176 void clear (void) { os.clear (); }
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177
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178 private:
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179
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180 std::ostringstream os;
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181 };
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182
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183 #endif