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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_octave_stream_h) |
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25 #define octave_octave_stream_h 1 |
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26 |
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27 class Matrix; |
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28 class string_vector; |
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29 class octave_value; |
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30 class octave_value_list; |
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31 |
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32 #include <iostream> |
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33 #include <sstream> |
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34 #include <string> |
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35 |
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36 #include "Array.h" |
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37 #include "data-conv.h" |
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38 #include "lo-utils.h" |
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39 #include "mach-info.h" |
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40 |
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41 class |
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42 scanf_format_elt |
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43 { |
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44 public: |
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45 |
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46 enum special_conversion |
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47 { |
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48 whitespace_conversion = 1, |
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49 literal_conversion = 2 |
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50 }; |
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51 |
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52 scanf_format_elt (const char *txt = 0, int w = 0, bool d = false, |
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53 char typ = '\0', char mod = '\0', |
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54 const std::string& ch_class = std::string ()) |
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55 : text (strsave (txt)), width (w), discard (d), type (typ), |
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56 modifier (mod), char_class (ch_class) { } |
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57 |
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58 scanf_format_elt (const scanf_format_elt& e) |
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59 : text (strsave (e.text)), width (e.width), discard (e.discard), |
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60 type (e.type), modifier (e.modifier), char_class (e.char_class) { } |
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61 |
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62 scanf_format_elt& operator = (const scanf_format_elt& e) |
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63 { |
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64 if (this != &e) |
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65 { |
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66 text = strsave (e.text); |
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67 width = e.width; |
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68 discard = e.discard; |
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69 type = e.type; |
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70 modifier = e.modifier; |
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71 char_class = e.char_class; |
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72 } |
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73 |
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74 return *this; |
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75 } |
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76 |
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77 ~scanf_format_elt (void) { delete [] text; } |
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78 |
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79 // The C-style format string. |
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80 const char *text; |
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81 |
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82 // The maximum field width. |
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83 int width; |
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84 |
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85 // TRUE if we are not storing the result of this conversion. |
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86 bool discard; |
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87 |
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88 // Type of conversion -- `d', `i', `o', `u', `x', `e', `f', `g', |
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89 // `c', `s', `p', `%', or `['. |
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90 char type; |
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91 |
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92 // A length modifier -- `h', `l', or `L'. |
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93 char modifier; |
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94 |
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95 // The class of characters in a `[' format. |
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96 std::string char_class; |
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97 }; |
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98 |
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99 class |
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100 scanf_format_list |
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101 { |
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102 public: |
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103 |
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104 scanf_format_list (const std::string& fmt = std::string ()); |
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105 |
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106 ~scanf_format_list (void); |
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107 |
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108 int num_conversions (void) { return nconv; } |
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109 |
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110 // The length can be different than the number of conversions. |
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111 // For example, "x %d y %d z" has 2 conversions but the length of |
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112 // the list is 3 because of the characters that appear after the |
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113 // last conversion. |
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114 |
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115 int length (void) { return list.length (); } |
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116 |
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117 const scanf_format_elt *first (void) |
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118 { |
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119 curr_idx = 0; |
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120 return current (); |
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121 } |
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122 |
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123 const scanf_format_elt *current (void) const |
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124 { return list.length () > 0 ? list.elem (curr_idx) : 0; } |
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125 |
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126 const scanf_format_elt *next (bool cycle = true) |
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127 { |
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128 curr_idx++; |
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129 |
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130 if (curr_idx >= list.length ()) |
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131 { |
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132 if (cycle) |
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133 curr_idx = 0; |
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134 else |
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135 return 0; |
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136 } |
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137 return current (); |
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138 } |
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139 |
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140 void printme (void) const; |
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141 |
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142 bool ok (void) const { return (nconv >= 0); } |
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143 |
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144 operator bool () const { return ok (); } |
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145 |
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146 bool all_character_conversions (void); |
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147 |
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148 bool all_numeric_conversions (void); |
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149 |
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150 private: |
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151 |
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152 // Number of conversions specified by this format string, or -1 if |
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153 // invalid conversions have been found. |
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154 int nconv; |
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155 |
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156 // Index to current element; |
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157 int curr_idx; |
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158 |
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159 // List of format elements. |
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160 Array<scanf_format_elt*> list; |
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161 |
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162 // Temporary buffer. |
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163 std::ostringstream *buf; |
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164 |
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165 void add_elt_to_list (int width, bool discard, char type, char modifier, |
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166 int& num_elts, |
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167 const std::string& char_class = std::string ()); |
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168 |
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169 void process_conversion (const std::string& s, int& i, int n, int& width, |
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170 bool& discard, char& type, char& modifier, |
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171 int& num_elts); |
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172 |
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173 int finish_conversion (const std::string& s, int& i, int n, int& width, |
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174 bool discard, char& type, char modifier, |
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175 int& num_elts); |
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176 // No copying! |
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177 |
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178 scanf_format_list (const scanf_format_list&); |
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179 |
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180 scanf_format_list& operator = (const scanf_format_list&); |
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181 }; |
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182 |
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183 class |
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184 printf_format_elt |
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185 { |
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186 public: |
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187 |
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188 printf_format_elt (const char *txt = 0, int n = 0, int w = 0, |
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189 int p = 0, const std::string& f = std::string (), |
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190 char typ = '\0', char mod = '\0') |
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191 : text (strsave (txt)), args (n), fw (w), prec (p), flags (f), |
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192 type (typ), modifier (mod) { } |
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193 |
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194 printf_format_elt (const printf_format_elt& e) |
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195 : text (strsave (e.text)), args (e.args), fw (e.fw), prec (e.prec), |
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196 flags (e.flags), type (e.type), modifier (e.modifier) { } |
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197 |
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198 printf_format_elt& operator = (const printf_format_elt& e) |
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199 { |
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200 if (this != &e) |
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201 { |
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202 text = strsave (e.text); |
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203 args = e.args; |
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204 fw = e.fw; |
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205 prec = e.prec; |
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206 flags = e.flags; |
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207 type = e.type; |
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208 modifier = e.modifier; |
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209 } |
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210 |
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211 return *this; |
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212 } |
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213 |
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214 ~printf_format_elt (void) { delete [] text; } |
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215 |
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216 // The C-style format string. |
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217 const char *text; |
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218 |
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219 // How many args do we expect to consume? |
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220 int args; |
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221 |
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222 // Field width. |
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223 int fw; |
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224 |
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225 // Precision. |
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226 int prec; |
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227 |
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228 // Flags -- `-', `+', ` ', `0', or `#'. |
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229 std::string flags; |
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230 |
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231 // Type of conversion -- `d', `i', `o', `x', `X', `u', `c', `s', |
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232 // `f', `e', `E', `g', `G', `p', or `%' |
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233 char type; |
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234 |
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235 // A length modifier -- `h', `l', or `L'. |
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236 char modifier; |
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237 }; |
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238 |
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239 class |
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240 printf_format_list |
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241 { |
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242 public: |
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243 |
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244 printf_format_list (const std::string& fmt = std::string ()); |
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245 |
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246 ~printf_format_list (void); |
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247 |
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248 int num_conversions (void) { return nconv; } |
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249 |
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250 const printf_format_elt *first (void) |
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251 { |
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252 curr_idx = 0; |
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253 return current (); |
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254 } |
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255 |
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256 const printf_format_elt *current (void) const |
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257 { return list.length () > 0 ? list.elem (curr_idx) : 0; } |
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258 |
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259 const printf_format_elt *next (bool cycle = true) |
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260 { |
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261 curr_idx++; |
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262 |
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263 if (curr_idx >= list.length ()) |
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264 { |
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265 if (cycle) |
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266 curr_idx = 0; |
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267 else |
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268 return 0; |
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269 } |
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270 |
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271 return current (); |
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272 } |
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273 |
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274 bool last_elt_p (void) { return (curr_idx + 1 == list.length ()); } |
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275 |
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276 void printme (void) const; |
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277 |
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278 bool ok (void) const { return (nconv >= 0); } |
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279 |
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280 operator bool () const { return ok (); } |
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281 |
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282 private: |
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283 |
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284 // Number of conversions specified by this format string, or -1 if |
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285 // invalid conversions have been found. |
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286 int nconv; |
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287 |
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288 // Index to current element; |
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289 int curr_idx; |
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290 |
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291 // List of format elements. |
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292 Array<printf_format_elt*> list; |
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293 |
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294 // Temporary buffer. |
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295 std::ostringstream *buf; |
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296 |
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297 void add_elt_to_list (int args, const std::string& flags, int fw, |
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298 int prec, char type, char modifier, |
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299 int& num_elts); |
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300 |
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301 void process_conversion (const std::string& s, int& i, int n, |
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302 int& args, std::string& flags, int& fw, |
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303 int& prec, char& modifier, char& type, |
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304 int& num_elts); |
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305 |
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306 void finish_conversion (const std::string& s, int& i, int args, |
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307 const std::string& flags, int fw, int prec, |
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308 char modifier, char& type, int& num_elts); |
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309 |
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310 // No copying! |
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311 |
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312 printf_format_list (const printf_format_list&); |
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313 |
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314 printf_format_list& operator = (const printf_format_list&); |
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315 }; |
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316 |
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317 // Provide an interface for Octave streams. |
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318 |
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319 class |
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320 octave_base_stream |
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321 { |
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322 friend class octave_stream; |
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323 |
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324 public: |
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325 |
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326 octave_base_stream (std::ios::openmode arg_md = std::ios::in|std::ios::out, |
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327 oct_mach_info::float_format ff |
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328 = oct_mach_info::native_float_format ()) |
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329 : count (0), md (arg_md), flt_fmt (ff), fail (false), open_state (true) |
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330 { } |
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331 |
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332 virtual ~octave_base_stream (void) { } |
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333 |
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334 // The remaining functions are not specific to input or output only, |
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335 // and must be provided by the derived classes. |
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336 |
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337 // Position a stream at OFFSET relative to ORIGIN. |
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338 |
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339 virtual int seek (long offset, int origin) = 0; |
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340 |
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341 // Return current stream position. |
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342 |
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343 virtual long tell (void) = 0; |
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344 |
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345 // Return TRUE if EOF has been reached on this stream. |
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346 |
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347 virtual bool eof (void) const = 0; |
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348 |
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349 // The name of the file. |
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350 |
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351 virtual std::string name (void) const = 0; |
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352 |
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353 // If the derived class provides this function and it returns a |
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354 // pointer to a valid istream, scanf(), read(), getl(), and gets() |
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355 // will automatically work for this stream. |
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356 |
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357 virtual std::istream *input_stream (void) { return 0; } |
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358 |
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359 // If the derived class provides this function and it returns a |
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360 // pointer to a valid ostream, flush(), write(), and printf() will |
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361 // automatically work for this stream. |
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362 |
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363 virtual std::ostream *output_stream (void) { return 0; } |
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364 |
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365 // Return TRUE if this stream is open. |
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366 |
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367 bool is_open (void) const { return open_state; } |
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368 |
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369 virtual void do_close (void) { } |
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370 |
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371 void close (void) |
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372 { |
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373 if (is_open ()) |
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374 { |
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375 open_state = false; |
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376 do_close (); |
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377 } |
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378 } |
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379 |
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380 int file_number (void); |
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381 |
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382 bool ok (void) const { return ! fail; } |
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383 |
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384 // Return current error message for this stream. |
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385 |
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386 std::string error (bool clear, int& err_num); |
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387 |
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388 protected: |
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389 |
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390 int mode (void) const { return md; } |
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391 |
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392 oct_mach_info::float_format float_format (void) const { return flt_fmt; } |
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393 |
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394 // Set current error state and set fail to TRUE. |
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395 |
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396 void error (const std::string& msg); |
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397 void error (const std::string& who, const std::string& msg); |
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398 |
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399 // Clear any error message and set fail to FALSE. |
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400 |
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401 void clear (void); |
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402 |
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403 // Clear stream state. |
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404 |
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405 void clearerr (void); |
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406 |
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407 private: |
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408 |
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409 // A reference count. |
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410 octave_idx_type count; |
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411 |
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412 // The permission bits for the file. Should be some combination of |
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413 // std::ios::open_mode bits. |
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414 int md; |
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415 |
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416 // Data format. |
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417 oct_mach_info::float_format flt_fmt; |
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418 |
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419 // TRUE if an error has occurred. |
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420 bool fail; |
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421 |
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422 // TRUE if this stream is open. |
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423 bool open_state; |
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424 |
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425 // Should contain error message if fail is TRUE. |
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426 std::string errmsg; |
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427 |
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428 // Functions that are defined for all input streams (input streams |
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429 // are those that define is). |
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430 |
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431 std::string do_gets (octave_idx_type max_len, bool& err, bool strip_newline, |
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432 const std::string& who /* = "gets" */); |
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433 |
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434 std::string getl (octave_idx_type max_len, bool& err, const std::string& who /* = "getl" */); |
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435 std::string gets (octave_idx_type max_len, bool& err, const std::string& who /* = "gets" */); |
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436 |
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437 octave_value do_scanf (scanf_format_list& fmt_list, octave_idx_type nr, octave_idx_type nc, |
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438 bool one_elt_size_spec, octave_idx_type& count, |
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439 const std::string& who /* = "scanf" */); |
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440 |
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441 octave_value scanf (const std::string& fmt, const Array<double>& size, |
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442 octave_idx_type& count, const std::string& who /* = "scanf" */); |
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443 |
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444 bool do_oscanf (const scanf_format_elt *elt, octave_value&, |
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445 const std::string& who /* = "scanf" */); |
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446 |
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447 octave_value_list oscanf (const std::string& fmt, |
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448 const std::string& who /* = "scanf" */); |
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449 |
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450 // Functions that are defined for all output streams (output streams |
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451 // are those that define os). |
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452 |
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453 int flush (void); |
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454 |
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4468
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455 int do_printf (printf_format_list& fmt_list, const octave_value_list& args, |
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456 const std::string& who /* = "printf" */); |
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2117
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457 |
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4468
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458 int printf (const std::string& fmt, const octave_value_list& args, |
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459 const std::string& who /* = "printf" */); |
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2117
|
460 |
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4468
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461 int puts (const std::string& s, const std::string& who /* = "puts" */); |
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2117
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462 |
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463 // We can always do this in terms of seek(), so the derived class |
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464 // only has to provide that. |
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465 |
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466 int rewind (void); |
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467 |
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4468
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468 void invalid_operation (const std::string& who, const char *rw); |
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2117
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469 |
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470 // No copying! |
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471 |
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472 octave_base_stream (const octave_base_stream&); |
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473 |
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474 octave_base_stream& operator = (const octave_base_stream&); |
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475 }; |
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476 |
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477 class |
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478 octave_stream |
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479 { |
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480 public: |
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481 |
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3340
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482 octave_stream (octave_base_stream *bs = 0); |
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483 |
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484 ~octave_stream (void); |
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2117
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485 |
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3340
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486 octave_stream (const octave_stream&); |
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487 |
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488 octave_stream& operator = (const octave_stream&); |
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2117
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489 |
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490 int flush (void); |
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491 |
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5275
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492 std::string getl (octave_idx_type max_len, bool& err, const std::string& who /* = "getl" */); |
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4468
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493 std::string getl (const octave_value& max_len, bool& err, |
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494 const std::string& who /* = "getl" */); |
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2117
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495 |
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5275
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496 std::string gets (octave_idx_type max_len, bool& err, const std::string& who /* = "gets" */); |
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4468
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497 std::string gets (const octave_value& max_len, bool& err, |
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498 const std::string& who /* = "gets" */); |
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2117
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499 |
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4797
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500 int seek (long offset, int origin); |
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2117
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501 int seek (const octave_value& offset, const octave_value& origin); |
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502 |
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4797
|
503 long tell (void); |
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2117
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504 |
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505 int rewind (void); |
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506 |
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3340
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507 bool is_open (void) const; |
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508 |
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509 void close (void); |
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510 |
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5275
|
511 octave_value read (const Array<double>& size, octave_idx_type block_size, |
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4944
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512 oct_data_conv::data_type input_type, |
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513 oct_data_conv::data_type output_type, |
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5275
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514 octave_idx_type skip, oct_mach_info::float_format flt_fmt, |
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515 octave_idx_type& count); |
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2117
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516 |
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5275
|
517 octave_idx_type write (const octave_value& data, octave_idx_type block_size, |
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4944
|
518 oct_data_conv::data_type output_type, |
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5275
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519 octave_idx_type skip, oct_mach_info::float_format flt_fmt); |
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4944
|
520 |
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521 template <class T> |
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5275
|
522 octave_idx_type write (const Array<T>&, octave_idx_type block_size, |
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4944
|
523 oct_data_conv::data_type output_type, |
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5275
|
524 octave_idx_type skip, oct_mach_info::float_format flt_fmt); |
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2117
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525 |
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4468
|
526 octave_value scanf (const std::string& fmt, const Array<double>& size, |
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5275
|
527 octave_idx_type& count, const std::string& who /* = "scanf" */); |
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2117
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528 |
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5279
|
529 octave_value scanf (const octave_value& fmt, const Array<double>& size, |
|
5299
|
530 octave_idx_type& count, const std::string& who /* = "scanf" */); |
|
5279
|
531 |
|
4468
|
532 octave_value_list oscanf (const std::string& fmt, |
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|
533 const std::string& who /* = "scanf" */); |
|
2215
|
534 |
|
5279
|
535 octave_value_list oscanf (const octave_value& fmt, |
|
|
536 const std::string& who /* = "scanf" */); |
|
|
537 |
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4468
|
538 int printf (const std::string& fmt, const octave_value_list& args, |
|
|
539 const std::string& who /* = "printf" */); |
|
2117
|
540 |
|
5279
|
541 int printf (const octave_value& fmt, const octave_value_list& args, |
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|
542 const std::string& who /* = "printf" */); |
|
|
543 |
|
4468
|
544 int puts (const std::string& s, const std::string& who /* = "puts" */); |
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|
545 int puts (const octave_value& s, const std::string& who /* = "puts" */); |
|
2117
|
546 |
|
|
547 bool eof (void) const; |
|
|
548 |
|
3523
|
549 std::string error (bool clear, int& err_num); |
|
2117
|
550 |
|
3523
|
551 std::string error (bool clear = false) |
|
2117
|
552 { |
|
2435
|
553 int err_num; |
|
|
554 return error (clear, err_num); |
|
2117
|
555 } |
|
|
556 |
|
4799
|
557 // Set the error message and state. |
|
|
558 |
|
|
559 void error (const std::string& msg) |
|
|
560 { |
|
|
561 if (rep) |
|
|
562 rep->error (msg); |
|
|
563 } |
|
|
564 |
|
|
565 void error (const char *msg) { error (std::string (msg)); } |
|
|
566 |
|
3148
|
567 int file_number (void) { return rep ? rep->file_number () : -1; } |
|
3145
|
568 |
|
3340
|
569 bool is_valid (void) const { return (rep != 0); } |
|
|
570 |
|
2117
|
571 bool ok (void) const { return rep && rep->ok (); } |
|
|
572 |
|
3145
|
573 operator bool () const { return ok (); } |
|
2117
|
574 |
|
3523
|
575 std::string name (void) const; |
|
2117
|
576 |
|
3340
|
577 int mode (void) const; |
|
2117
|
578 |
|
3340
|
579 oct_mach_info::float_format float_format (void) const; |
|
2117
|
580 |
|
3523
|
581 static std::string mode_as_string (int mode); |
|
2117
|
582 |
|
3523
|
583 std::istream *input_stream (void) { return rep ? rep->input_stream () : 0; } |
|
2902
|
584 |
|
3523
|
585 std::ostream *output_stream (void) { return rep ? rep->output_stream () : 0; } |
|
2902
|
586 |
|
4889
|
587 void clearerr (void) { if (rep) rep->clearerr (); } |
|
|
588 |
|
2117
|
589 private: |
|
|
590 |
|
|
591 // The actual representation of this stream. |
|
|
592 octave_base_stream *rep; |
|
|
593 |
|
5659
|
594 bool stream_ok (bool clear = true) const |
|
|
595 { |
|
|
596 bool retval = true; |
|
|
597 |
|
|
598 if (rep) |
|
|
599 { |
|
|
600 if (clear) |
|
|
601 rep->clear (); |
|
|
602 } |
|
|
603 else |
|
|
604 retval = false; |
|
|
605 |
|
|
606 return retval; |
|
|
607 } |
|
4944
|
608 |
|
|
609 void invalid_operation (const std::string& who, const char *rw) |
|
|
610 { |
|
|
611 if (rep) |
|
|
612 rep->invalid_operation (who, rw); |
|
|
613 } |
|
2117
|
614 }; |
|
|
615 |
|
|
616 class |
|
|
617 octave_stream_list |
|
|
618 { |
|
|
619 protected: |
|
|
620 |
|
|
621 octave_stream_list (void) : list (32), curr_len (0) { } |
|
|
622 |
|
|
623 public: |
|
|
624 |
|
|
625 ~octave_stream_list (void) { } |
|
|
626 |
|
2926
|
627 static bool instance_ok (void); |
|
|
628 |
|
5353
|
629 static int insert (const octave_stream& os); |
|
2117
|
630 |
|
4468
|
631 static octave_stream |
|
|
632 lookup (int fid, const std::string& who = std::string ()); |
|
|
633 |
|
|
634 static octave_stream |
|
|
635 lookup (const octave_value& fid, const std::string& who = std::string ()); |
|
2117
|
636 |
|
3523
|
637 static int remove (int fid, const std::string& who = std::string ()); |
|
3341
|
638 static int remove (const octave_value& fid, |
|
3523
|
639 const std::string& who = std::string ()); |
|
2117
|
640 |
|
|
641 static void clear (void); |
|
|
642 |
|
|
643 static string_vector get_info (int fid); |
|
|
644 static string_vector get_info (const octave_value& fid); |
|
|
645 |
|
3523
|
646 static std::string list_open_files (void); |
|
2117
|
647 |
|
|
648 static octave_value open_file_numbers (void); |
|
|
649 |
|
2609
|
650 static int get_file_number (const octave_value& fid); |
|
|
651 |
|
2117
|
652 private: |
|
|
653 |
|
3340
|
654 Array<octave_stream> list; |
|
2117
|
655 |
|
|
656 int curr_len; |
|
|
657 |
|
|
658 static octave_stream_list *instance; |
|
|
659 |
|
5353
|
660 int do_insert (const octave_stream& os); |
|
2117
|
661 |
|
3523
|
662 octave_stream do_lookup (int fid, const std::string& who = std::string ()) const; |
|
3341
|
663 octave_stream do_lookup (const octave_value& fid, |
|
3523
|
664 const std::string& who = std::string ()) const; |
|
2117
|
665 |
|
3523
|
666 int do_remove (int fid, const std::string& who = std::string ()); |
|
|
667 int do_remove (const octave_value& fid, const std::string& who = std::string ()); |
|
2117
|
668 |
|
|
669 void do_clear (void); |
|
|
670 |
|
|
671 string_vector do_get_info (int fid) const; |
|
|
672 string_vector do_get_info (const octave_value& fid) const; |
|
|
673 |
|
3523
|
674 std::string do_list_open_files (void) const; |
|
2117
|
675 |
|
|
676 octave_value do_open_file_numbers (void) const; |
|
|
677 |
|
2609
|
678 int do_get_file_number (const octave_value& fid) const; |
|
2117
|
679 }; |
|
|
680 |
|
|
681 #endif |
|
|
682 |
|
|
683 /* |
|
|
684 ;;; Local Variables: *** |
|
|
685 ;;; mode: C++ *** |
|
|
686 ;;; End: *** |
|
|
687 */ |
