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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_octave_stream_h) |
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24 #define octave_octave_stream_h 1 |
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25 |
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26 class Matrix; |
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27 class string_vector; |
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28 class octave_value; |
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29 class octave_value_list; |
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30 |
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31 #include <iostream> |
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32 #include <string> |
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33 |
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34 #include "Array.h" |
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35 #include "data-conv.h" |
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36 #include "lo-sstream.h" |
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37 #include "lo-utils.h" |
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38 #include "mach-info.h" |
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39 |
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40 class |
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41 scanf_format_elt |
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42 { |
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43 public: |
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44 |
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45 enum special_conversion |
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46 { |
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47 whitespace_conversion = 1, |
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48 literal_conversion = 2 |
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49 }; |
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50 |
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51 scanf_format_elt (const char *txt = 0, int w = 0, bool d = false, |
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52 char typ = '\0', char mod = '\0', |
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53 const std::string& ch_class = std::string ()) |
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54 : text (strsave (txt)), width (w), discard (d), type (typ), |
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55 modifier (mod), char_class (ch_class) { } |
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56 |
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57 scanf_format_elt (const scanf_format_elt& e) |
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58 : text (strsave (e.text)), width (e.width), discard (e.discard), |
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59 type (e.type), modifier (e.modifier), char_class (e.char_class) { } |
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60 |
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61 scanf_format_elt& operator = (const scanf_format_elt& e) |
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62 { |
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63 if (this != &e) |
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64 { |
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65 text = strsave (e.text); |
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66 width = e.width; |
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67 discard = e.discard; |
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68 type = e.type; |
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69 modifier = e.modifier; |
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70 char_class = e.char_class; |
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71 } |
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72 |
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73 return *this; |
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74 } |
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75 |
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76 ~scanf_format_elt (void) { delete [] text; } |
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77 |
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78 // The C-style format string. |
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79 const char *text; |
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80 |
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81 // The maximum field width. |
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82 int width; |
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83 |
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84 // TRUE if we are not storing the result of this conversion. |
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85 bool discard; |
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86 |
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87 // Type of conversion -- `d', `i', `o', `u', `x', `e', `f', `g', |
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88 // `c', `s', `p', `%', or `['. |
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89 char type; |
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90 |
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91 // A length modifier -- `h', `l', or `L'. |
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92 char modifier; |
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93 |
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94 // The class of characters in a `[' format. |
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95 std::string char_class; |
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96 }; |
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97 |
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98 class |
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99 scanf_format_list |
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100 { |
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101 public: |
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102 |
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103 scanf_format_list (const std::string& fmt = std::string ()); |
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104 |
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105 ~scanf_format_list (void); |
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106 |
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107 int num_conversions (void) { return nconv; } |
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108 |
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109 // The length can be different than the number of conversions. |
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110 // For example, "x %d y %d z" has 2 conversions but the length of |
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111 // the list is 3 because of the characters that appear after the |
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112 // last conversion. |
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113 |
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114 int length (void) { return list.length (); } |
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115 |
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116 const scanf_format_elt *first (void) |
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117 { |
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118 curr_idx = 0; |
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119 return current (); |
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120 } |
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121 |
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122 const scanf_format_elt *current (void) const |
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123 { return list.length () > 0 ? list.elem (curr_idx) : 0; } |
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124 |
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125 const scanf_format_elt *next (bool cycle = true) |
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126 { |
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127 curr_idx++; |
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128 |
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129 if (curr_idx >= list.length ()) |
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130 { |
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131 if (cycle) |
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132 curr_idx = 0; |
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133 else |
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134 return 0; |
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135 } |
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136 return current (); |
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137 } |
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138 |
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139 void printme (void) const; |
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140 |
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141 bool ok (void) const { return (nconv >= 0); } |
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142 |
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143 operator bool () const { return ok (); } |
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144 |
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145 bool all_character_conversions (void); |
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146 |
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147 bool all_numeric_conversions (void); |
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148 |
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149 private: |
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150 |
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151 // Number of conversions specified by this format string, or -1 if |
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152 // invalid conversions have been found. |
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153 int nconv; |
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154 |
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155 // Index to current element; |
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156 int curr_idx; |
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157 |
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158 // List of format elements. |
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159 Array<scanf_format_elt*> list; |
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160 |
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161 // Temporary buffer. |
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162 OSSTREAM *buf; |
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163 |
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164 void add_elt_to_list (int width, bool discard, char type, char modifier, |
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165 int& num_elts, |
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166 const std::string& char_class = std::string ()); |
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167 |
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168 void process_conversion (const std::string& s, int& i, int n, int& width, |
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169 bool& discard, char& type, char& modifier, |
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170 int& num_elts); |
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171 |
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172 int finish_conversion (const std::string& s, int& i, int n, int& width, |
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173 bool discard, char& type, char modifier, |
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174 int& num_elts); |
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175 // No copying! |
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176 |
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177 scanf_format_list (const scanf_format_list&); |
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178 |
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179 scanf_format_list& operator = (const scanf_format_list&); |
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180 }; |
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181 |
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182 class |
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183 printf_format_elt |
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184 { |
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185 public: |
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186 |
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187 printf_format_elt (const char *txt = 0, int n = 0, int w = 0, |
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188 int p = 0, const std::string& f = std::string (), |
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189 char typ = '\0', char mod = '\0') |
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190 : text (strsave (txt)), args (n), fw (w), prec (p), flags (f), |
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191 type (typ), modifier (mod) { } |
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192 |
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193 printf_format_elt (const printf_format_elt& e) |
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194 : text (strsave (e.text)), args (e.args), fw (e.fw), prec (e.prec), |
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195 flags (e.flags), type (e.type), modifier (e.modifier) { } |
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196 |
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197 printf_format_elt& operator = (const printf_format_elt& e) |
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198 { |
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199 if (this != &e) |
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200 { |
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201 text = strsave (e.text); |
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202 args = e.args; |
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203 fw = e.fw; |
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204 prec = e.prec; |
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205 flags = e.flags; |
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206 type = e.type; |
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207 modifier = e.modifier; |
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208 } |
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209 |
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210 return *this; |
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211 } |
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212 |
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213 ~printf_format_elt (void) { delete [] text; } |
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214 |
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215 // The C-style format string. |
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216 const char *text; |
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217 |
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218 // How many args do we expect to consume? |
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219 int args; |
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220 |
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221 // Field width. |
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222 int fw; |
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223 |
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224 // Precision. |
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225 int prec; |
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226 |
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227 // Flags -- `-', `+', ` ', `0', or `#'. |
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228 std::string flags; |
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229 |
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230 // Type of conversion -- `d', `i', `o', `x', `X', `u', `c', `s', |
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231 // `f', `e', `E', `g', `G', `p', or `%' |
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232 char type; |
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233 |
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234 // A length modifier -- `h', `l', or `L'. |
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235 char modifier; |
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236 }; |
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237 |
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238 class |
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239 printf_format_list |
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240 { |
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241 public: |
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242 |
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243 printf_format_list (const std::string& fmt = std::string ()); |
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244 |
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245 ~printf_format_list (void); |
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246 |
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247 int num_conversions (void) { return nconv; } |
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248 |
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249 const printf_format_elt *first (void) |
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250 { |
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251 curr_idx = 0; |
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252 return current (); |
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253 } |
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254 |
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255 const printf_format_elt *current (void) const |
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256 { return list.length () > 0 ? list.elem (curr_idx) : 0; } |
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257 |
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258 const printf_format_elt *next (bool cycle = true) |
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259 { |
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260 curr_idx++; |
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261 |
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262 if (curr_idx >= list.length ()) |
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263 { |
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264 if (cycle) |
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265 curr_idx = 0; |
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266 else |
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267 return 0; |
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268 } |
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269 |
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270 return current (); |
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271 } |
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272 |
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273 bool last_elt_p (void) { return (curr_idx + 1 == list.length ()); } |
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274 |
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275 void printme (void) const; |
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276 |
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277 bool ok (void) const { return (nconv >= 0); } |
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278 |
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279 operator bool () const { return ok (); } |
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280 |
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281 private: |
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282 |
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283 // Number of conversions specified by this format string, or -1 if |
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284 // invalid conversions have been found. |
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285 int nconv; |
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286 |
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287 // Index to current element; |
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288 int curr_idx; |
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289 |
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290 // List of format elements. |
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291 Array<printf_format_elt*> list; |
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292 |
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293 // Temporary buffer. |
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294 OSSTREAM *buf; |
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295 |
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296 void add_elt_to_list (int args, const std::string& flags, int fw, |
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297 int prec, char type, char modifier, |
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298 int& num_elts); |
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299 |
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300 void process_conversion (const std::string& s, int& i, int n, |
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301 int& args, std::string& flags, int& fw, |
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302 int& prec, char& modifier, char& type, |
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303 int& num_elts); |
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304 |
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305 void finish_conversion (const std::string& s, int& i, int args, |
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306 const std::string& flags, int fw, int prec, |
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307 char modifier, char& type, int& num_elts); |
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308 |
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309 // No copying! |
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310 |
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311 printf_format_list (const printf_format_list&); |
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312 |
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313 printf_format_list& operator = (const printf_format_list&); |
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314 }; |
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315 |
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316 // Provide an interface for Octave streams. |
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317 |
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318 class |
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319 octave_base_stream |
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320 { |
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321 friend class octave_stream; |
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322 |
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323 public: |
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324 |
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325 octave_base_stream (std::ios::openmode arg_md = std::ios::in|std::ios::out, |
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326 oct_mach_info::float_format ff = oct_mach_info::native) |
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327 : count (0), md (arg_md), flt_fmt (ff), fail (false), open_state (true) |
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328 { } |
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329 |
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330 virtual ~octave_base_stream (void) { } |
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331 |
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332 // The remaining functions are not specific to input or output only, |
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333 // and must be provided by the derived classes. |
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334 |
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335 // Position a stream at OFFSET relative to ORIGIN. |
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336 |
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337 virtual int seek (std::streamoff offset, std::ios::seekdir origin) = 0; |
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338 |
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339 // Return current stream position. |
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340 |
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341 virtual long tell (void) const = 0; |
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342 |
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343 // Return TRUE if EOF has been reached on this stream. |
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344 |
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345 virtual bool eof (void) const = 0; |
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346 |
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347 // The name of the file. |
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348 |
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349 virtual std::string name (void) const = 0; |
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350 |
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351 // If the derived class provides this function and it returns a |
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352 // pointer to a valid istream, scanf(), read(), getl(), and gets() |
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353 // will automatically work for this stream. |
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354 |
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355 virtual std::istream *input_stream (void) { return 0; } |
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356 |
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357 // If the derived class provides this function and it returns a |
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358 // pointer to a valid ostream, flush(), write(), and printf() will |
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359 // automatically work for this stream. |
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360 |
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361 virtual std::ostream *output_stream (void) { return 0; } |
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362 |
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363 // Return TRUE if this stream is open. |
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364 |
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365 bool is_open (void) const { return open_state; } |
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366 |
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367 virtual void do_close (void) { } |
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368 |
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369 void close (void) |
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370 { |
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371 if (is_open ()) |
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372 { |
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373 open_state = false; |
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374 do_close (); |
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375 } |
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376 } |
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377 |
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378 int file_number (void); |
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379 |
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380 bool ok (void) const { return ! fail; } |
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381 |
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382 // Return current error message for this stream. |
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383 |
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384 std::string error (bool clear, int& err_num); |
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385 |
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386 protected: |
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387 |
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388 int mode (void) const { return md; } |
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389 |
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390 oct_mach_info::float_format float_format (void) const { return flt_fmt; } |
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391 |
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392 // Set current error state and set fail to TRUE. |
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393 |
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394 void error (const std::string& msg); |
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395 |
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396 // Clear any error message and set fail to FALSE. |
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397 |
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398 void clear (void); |
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399 |
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400 private: |
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401 |
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402 // A reference count. |
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403 int count; |
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404 |
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405 // The permission bits for the file. Should be some combination of |
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406 // std::ios::open_mode bits. |
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407 int md; |
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408 |
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409 // Data format. |
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410 oct_mach_info::float_format flt_fmt; |
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411 |
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412 // TRUE if an error has occurred. |
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413 bool fail; |
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414 |
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415 // TRUE if this stream is open. |
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416 bool open_state; |
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417 |
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418 // Should contain error message if fail is TRUE. |
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419 std::string errmsg; |
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420 |
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421 // Functions that are defined for all input streams (input streams |
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422 // are those that define is). |
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423 |
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424 std::string do_gets (int max_len, bool& err, bool strip_newline, |
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425 const char *fcn); |
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426 |
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427 std::string getl (int max_len, bool& err); |
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428 std::string gets (int max_len, bool& err); |
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429 |
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430 octave_value do_read (int nr, int nc, oct_data_conv::data_type dt, |
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431 int skip, oct_mach_info::float_format flt_fmt, |
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432 int& count); |
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433 |
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434 octave_value read (const Array<double>& size, oct_data_conv::data_type dt, |
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435 int skip, oct_mach_info::float_format flt_fmt, |
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436 int& count); |
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437 |
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438 octave_value do_char_scanf (scanf_format_list& fmt_list, |
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439 int nr, int nc, int& count); |
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440 |
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441 octave_value do_real_scanf (scanf_format_list& fmt_list, |
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442 int nr, int nc, int& count); |
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443 |
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444 octave_value do_scanf (scanf_format_list& fmt_list, int nr, int nc, |
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445 bool one_elt_size_spec, int& count); |
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446 |
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447 octave_value scanf (const std::string& fmt, const Array<double>& size, int& count); |
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448 |
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449 bool do_oscanf (const scanf_format_elt *elt, octave_value&); |
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450 |
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451 octave_value_list oscanf (const std::string& fmt); |
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452 |
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453 // Functions that are defined for all output streams (output streams |
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454 // are those that define os). |
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455 |
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456 int flush (void); |
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457 |
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2317
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458 int write (const octave_value& data, oct_data_conv::data_type dt, |
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459 int skip, oct_mach_info::float_format flt_fmt); |
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2117
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460 |
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461 int do_printf (printf_format_list& fmt_list, const octave_value_list& args); |
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462 |
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3523
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463 int printf (const std::string& fmt, const octave_value_list& args); |
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2117
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464 |
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3523
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465 int puts (const std::string& s); |
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2117
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466 |
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467 // We can always do this in terms of seek(), so the derived class |
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468 // only has to provide that. |
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469 |
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470 int rewind (void); |
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471 |
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472 void invalid_operation (const char *op, const char *rw); |
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473 |
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474 // No copying! |
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475 |
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476 octave_base_stream (const octave_base_stream&); |
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477 |
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478 octave_base_stream& operator = (const octave_base_stream&); |
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479 }; |
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480 |
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481 class |
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482 octave_stream |
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483 { |
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484 public: |
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485 |
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3340
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486 octave_stream (octave_base_stream *bs = 0); |
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487 |
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488 ~octave_stream (void); |
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2117
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489 |
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3340
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490 octave_stream (const octave_stream&); |
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491 |
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492 octave_stream& operator = (const octave_stream&); |
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2117
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493 |
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494 int flush (void); |
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495 |
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3523
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496 std::string getl (int max_len, bool& err); |
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497 std::string getl (const octave_value& max_len, bool& err); |
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2117
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498 |
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3523
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499 std::string gets (int max_len, bool& err); |
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500 std::string gets (const octave_value& max_len, bool& err); |
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2117
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501 |
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3775
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502 int seek (std::streamoff offset, std::ios::seekdir origin); |
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2117
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503 int seek (const octave_value& offset, const octave_value& origin); |
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504 |
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505 long tell (void) const; |
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506 |
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507 int rewind (void); |
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508 |
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3340
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509 bool is_open (void) const; |
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510 |
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511 void close (void); |
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512 |
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3810
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513 octave_value read (const Array<double>& size, oct_data_conv::data_type dt, |
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2317
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514 int skip, oct_mach_info::float_format flt_fmt, |
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2117
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515 int& count); |
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516 |
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2317
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517 int write (const octave_value& data, oct_data_conv::data_type dt, |
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518 int skip, oct_mach_info::float_format flt_fmt); |
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2117
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519 |
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3810
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520 octave_value scanf (const std::string& fmt, const Array<double>& size, int& count); |
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2117
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521 |
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3523
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522 octave_value_list oscanf (const std::string& fmt); |
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2215
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523 |
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3523
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524 int printf (const std::string& fmt, const octave_value_list& args); |
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2117
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525 |
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3523
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526 int puts (const std::string& s); |
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2117
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527 int puts (const octave_value& s); |
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528 |
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529 bool eof (void) const; |
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530 |
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3523
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531 std::string error (bool clear, int& err_num); |
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2117
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532 |
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3523
|
533 std::string error (bool clear = false) |
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2117
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534 { |
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2435
|
535 int err_num; |
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536 return error (clear, err_num); |
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2117
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537 } |
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538 |
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3148
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539 int file_number (void) { return rep ? rep->file_number () : -1; } |
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3145
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540 |
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3340
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541 bool is_valid (void) const { return (rep != 0); } |
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542 |
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2117
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543 bool ok (void) const { return rep && rep->ok (); } |
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544 |
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3145
|
545 operator bool () const { return ok (); } |
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2117
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546 |
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3523
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547 std::string name (void) const; |
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2117
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548 |
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3340
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549 int mode (void) const; |
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2117
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550 |
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3340
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551 oct_mach_info::float_format float_format (void) const; |
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2117
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552 |
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3523
|
553 static std::string mode_as_string (int mode); |
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2117
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554 |
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3523
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555 std::istream *input_stream (void) { return rep ? rep->input_stream () : 0; } |
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2902
|
556 |
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3523
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557 std::ostream *output_stream (void) { return rep ? rep->output_stream () : 0; } |
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2902
|
558 |
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2117
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559 private: |
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560 |
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|
561 // The actual representation of this stream. |
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|
562 octave_base_stream *rep; |
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|
563 |
|
|
564 void invalid_stream_error (const char *op) const; |
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565 |
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566 bool stream_ok (const char *op, bool clear = true) const |
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|
567 { |
|
|
568 bool retval = true; |
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|
569 |
|
|
570 if (rep) |
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|
571 { |
|
|
572 if (clear) |
|
|
573 rep->clear (); |
|
|
574 } |
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|
575 else |
|
|
576 { |
|
|
577 retval = false; |
|
|
578 invalid_stream_error (op); |
|
|
579 } |
|
|
580 |
|
|
581 return retval; |
|
|
582 } |
|
|
583 |
|
3523
|
584 void error (const std::string& msg) |
|
2117
|
585 { |
|
|
586 if (rep) |
|
|
587 rep->error (msg); |
|
|
588 } |
|
|
589 }; |
|
|
590 |
|
|
591 class |
|
|
592 octave_stream_list |
|
|
593 { |
|
|
594 protected: |
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|
595 |
|
|
596 octave_stream_list (void) : list (32), curr_len (0) { } |
|
|
597 |
|
|
598 public: |
|
|
599 |
|
|
600 ~octave_stream_list (void) { } |
|
|
601 |
|
2926
|
602 static bool instance_ok (void); |
|
|
603 |
|
3340
|
604 static octave_value insert (const octave_stream& os); |
|
2117
|
605 |
|
3523
|
606 static octave_stream lookup (int fid, const std::string& who = std::string ()); |
|
3341
|
607 static octave_stream lookup (const octave_value& fid, |
|
3523
|
608 const std::string& who = std::string ()); |
|
2117
|
609 |
|
3523
|
610 static int remove (int fid, const std::string& who = std::string ()); |
|
3341
|
611 static int remove (const octave_value& fid, |
|
3523
|
612 const std::string& who = std::string ()); |
|
2117
|
613 |
|
|
614 static void clear (void); |
|
|
615 |
|
|
616 static string_vector get_info (int fid); |
|
|
617 static string_vector get_info (const octave_value& fid); |
|
|
618 |
|
3523
|
619 static std::string list_open_files (void); |
|
2117
|
620 |
|
|
621 static octave_value open_file_numbers (void); |
|
|
622 |
|
2609
|
623 static int get_file_number (const octave_value& fid); |
|
|
624 |
|
2117
|
625 private: |
|
|
626 |
|
3340
|
627 Array<octave_stream> list; |
|
2117
|
628 |
|
|
629 int curr_len; |
|
|
630 |
|
|
631 static octave_stream_list *instance; |
|
|
632 |
|
3340
|
633 octave_value do_insert (const octave_stream& os); |
|
2117
|
634 |
|
3523
|
635 octave_stream do_lookup (int fid, const std::string& who = std::string ()) const; |
|
3341
|
636 octave_stream do_lookup (const octave_value& fid, |
|
3523
|
637 const std::string& who = std::string ()) const; |
|
2117
|
638 |
|
3523
|
639 int do_remove (int fid, const std::string& who = std::string ()); |
|
|
640 int do_remove (const octave_value& fid, const std::string& who = std::string ()); |
|
2117
|
641 |
|
|
642 void do_clear (void); |
|
|
643 |
|
|
644 string_vector do_get_info (int fid) const; |
|
|
645 string_vector do_get_info (const octave_value& fid) const; |
|
|
646 |
|
3523
|
647 std::string do_list_open_files (void) const; |
|
2117
|
648 |
|
|
649 octave_value do_open_file_numbers (void) const; |
|
|
650 |
|
2609
|
651 int do_get_file_number (const octave_value& fid) const; |
|
2117
|
652 }; |
|
|
653 |
|
|
654 #endif |
|
|
655 |
|
|
656 /* |
|
|
657 ;;; Local Variables: *** |
|
|
658 ;;; mode: C++ *** |
|
|
659 ;;; End: *** |
|
|
660 */ |
