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1 /* |
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2 |
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2847
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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 (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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3503
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31 #include <iostream> |
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32 |
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3933
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33 #include "Cell.h" |
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34 #include "defun.h" |
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35 #include "error.h" |
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36 #include "gripes.h" |
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37 #include "oct-lvalue.h" |
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38 #include "ov-list.h" |
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39 #include "ov-struct.h" |
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40 #include "unwind-prot.h" |
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2948
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41 #include "variables.h" |
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42 |
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3219
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43 DEFINE_OCTAVE_ALLOCATOR(octave_struct); |
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44 |
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4612
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45 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA(octave_struct, "struct", "struct"); |
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46 |
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4513
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47 Cell |
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48 octave_struct::dotref (const octave_value_list& idx) |
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2962
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49 { |
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50 Cell retval; |
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51 |
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52 assert (idx.length () == 1); |
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53 |
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54 std::string nm = idx(0).string_value (); |
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55 |
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4219
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56 Octave_map::const_iterator p = map.seek (nm); |
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57 |
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58 if (p != map.end ()) |
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59 retval = map.contents (p); |
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60 else |
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61 error ("structure has no member `%s'", nm.c_str ()); |
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62 |
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63 return retval; |
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64 } |
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65 |
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66 #if 0 |
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67 static void |
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68 gripe_invalid_index (void) |
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69 { |
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70 error ("invalid index for structure array"); |
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71 } |
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72 #endif |
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73 |
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74 static void |
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75 gripe_invalid_index_for_assignment (void) |
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76 { |
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77 error ("invalid index for structure array assignment"); |
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78 } |
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79 |
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80 static void |
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81 gripe_invalid_index_type (const std::string& nm, char t) |
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82 { |
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83 error ("%s cannot be indexed with %c", nm.c_str (), t); |
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84 } |
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85 |
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86 static void |
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87 gripe_failed_assignment (void) |
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88 { |
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89 error ("assignment to structure element failed"); |
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90 } |
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91 |
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92 octave_value |
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4247
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93 octave_struct::subsref (const std::string& type, |
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94 const std::list<octave_value_list>& idx) |
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95 { |
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96 octave_value retval; |
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97 |
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98 int skip = 1; |
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99 |
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100 switch (type[0]) |
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101 { |
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102 case '(': |
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103 { |
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104 if (type.length () > 1 && type[1] == '.') |
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105 { |
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106 std::list<octave_value_list>::const_iterator p = idx.begin (); |
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107 octave_value_list key_idx = *++p; |
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108 |
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109 Cell tmp = dotref (key_idx); |
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110 |
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111 if (! error_state) |
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112 { |
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113 Cell t = tmp.index (idx.front ()); |
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114 |
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115 retval = (t.length () == 1) ? t(0) : octave_value (t, true); |
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116 |
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117 // We handled two index elements, so tell |
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118 // next_subsref to skip both of them. |
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119 |
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120 skip++; |
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121 } |
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122 } |
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123 else |
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124 retval = map.index (idx.front ()); |
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125 } |
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126 break; |
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127 |
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128 case '.': |
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129 { |
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130 Cell t = dotref (idx.front ()); |
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131 |
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132 retval = (t.length () == 1) ? t(0) : octave_value (t, true); |
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133 } |
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134 break; |
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135 |
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136 case '{': |
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137 gripe_invalid_index_type (type_name (), type[0]); |
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138 break; |
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139 |
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140 default: |
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141 panic_impossible (); |
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142 } |
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143 |
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144 if (! error_state) |
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145 retval = retval.next_subsref (type, idx, skip); |
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146 |
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147 return retval; |
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148 } |
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149 |
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150 octave_value |
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151 octave_struct::numeric_conv (const Cell& val, |
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152 const std::string& type) |
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153 { |
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154 octave_value retval; |
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155 |
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156 if (val.length () == 1) |
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157 { |
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158 retval = val(0); |
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159 |
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160 if (type.length () > 0 && type[0] == '.' && ! retval.is_map ()) |
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161 retval = Octave_map (); |
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162 } |
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163 else |
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164 gripe_invalid_index_for_assignment (); |
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165 |
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166 return retval; |
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167 } |
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168 |
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169 octave_value |
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170 octave_struct::subsasgn (const std::string& type, |
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171 const std::list<octave_value_list>& idx, |
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172 const octave_value& rhs) |
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173 { |
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174 octave_value retval; |
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175 |
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176 int n = type.length (); |
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177 |
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178 octave_value t_rhs = rhs; |
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179 |
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180 if (n > 1 && ! (type.length () == 2 && type[0] == '(' && type[1] == '.')) |
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181 { |
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182 switch (type[0]) |
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183 { |
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184 case '(': |
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185 { |
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186 if (type.length () > 1 && type[1] == '.') |
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187 { |
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188 std::list<octave_value_list>::const_iterator p = idx.begin (); |
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189 octave_value_list t_idx = *p; |
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190 |
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191 octave_value_list key_idx = *++p; |
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192 |
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193 assert (key_idx.length () == 1); |
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194 |
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195 std::string key = key_idx(0).string_value (); |
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196 |
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197 octave_value u; |
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198 |
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199 if (! map.contains (key)) |
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200 u = octave_value::empty_conv (type.substr (2), rhs); |
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201 else |
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202 { |
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203 Cell map_val = map[key]; |
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204 |
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205 Cell map_elt = map_val.index (idx.front (), true); |
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206 |
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207 u = numeric_conv (map_elt, type.substr (2)); |
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208 } |
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209 |
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210 if (! error_state) |
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211 { |
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212 std::list<octave_value_list> next_idx (idx); |
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213 |
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214 // We handled two index elements, so subsasgn to |
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215 // needs to skip both of them. |
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216 |
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217 next_idx.erase (next_idx.begin ()); |
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218 next_idx.erase (next_idx.begin ()); |
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219 |
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220 u.make_unique (); |
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221 |
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222 t_rhs = u.subsasgn (type.substr (2), next_idx, rhs); |
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223 } |
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224 } |
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225 else |
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226 gripe_invalid_index_for_assignment (); |
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227 } |
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228 break; |
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229 |
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230 case '.': |
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231 { |
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232 octave_value_list key_idx = idx.front (); |
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233 |
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234 assert (key_idx.length () == 1); |
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235 |
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236 std::string key = key_idx(0).string_value (); |
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237 |
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238 octave_value u; |
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239 |
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240 if (! map.contains (key)) |
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241 u = octave_value::empty_conv (type.substr (1), rhs); |
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242 else |
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243 { |
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244 Cell map_val = map[key]; |
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245 |
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246 u = numeric_conv (map_val, type.substr (1)); |
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247 } |
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248 |
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249 if (! error_state) |
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250 { |
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251 std::list<octave_value_list> next_idx (idx); |
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252 |
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253 next_idx.erase (next_idx.begin ()); |
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254 |
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4059
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255 u.make_unique (); |
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256 |
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257 t_rhs = u.subsasgn (type.substr (1), next_idx, rhs); |
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258 } |
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259 } |
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260 break; |
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261 |
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262 case '{': |
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263 gripe_invalid_index_type (type_name (), type[0]); |
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264 break; |
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265 |
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266 default: |
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267 panic_impossible (); |
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268 } |
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269 } |
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270 |
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271 if (! error_state) |
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272 { |
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273 switch (type[0]) |
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274 { |
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275 case '(': |
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276 { |
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277 if (n > 1 && type[1] == '.') |
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278 { |
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279 std::list<octave_value_list>::const_iterator p = idx.begin (); |
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280 octave_value_list key_idx = *++p; |
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281 |
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282 assert (key_idx.length () == 1); |
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283 |
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284 std::string key = key_idx(0).string_value (); |
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285 |
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286 if (! error_state) |
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287 { |
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288 map.assign (idx.front (), key, t_rhs); |
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289 |
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4513
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290 if (! error_state) |
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291 retval = octave_value (this, count + 1); |
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292 else |
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293 gripe_failed_assignment (); |
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294 } |
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295 else |
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296 gripe_failed_assignment (); |
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297 } |
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298 else |
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4197
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299 { |
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4513
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300 Octave_map rhs_map = t_rhs.map_value (); |
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4197
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301 |
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4513
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302 if (! error_state) |
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4197
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303 { |
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4513
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304 map.assign (idx.front (), rhs_map); |
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4197
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305 |
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306 if (! error_state) |
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4513
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307 retval = octave_value (this, count + 1); |
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4197
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308 else |
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4513
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309 gripe_failed_assignment (); |
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4197
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310 } |
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4513
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311 else |
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312 error ("invalid structure assignment"); |
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4197
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313 } |
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3933
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314 } |
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315 break; |
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316 |
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317 case '.': |
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318 { |
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319 octave_value_list key_idx = idx.front (); |
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320 |
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321 assert (key_idx.length () == 1); |
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322 |
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323 std::string key = key_idx(0).string_value (); |
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324 |
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325 map.assign (key, t_rhs); |
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326 |
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327 if (! error_state) |
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328 retval = octave_value (this, count + 1); |
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329 else |
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330 gripe_failed_assignment (); |
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331 } |
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332 break; |
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333 |
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334 case '{': |
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335 gripe_invalid_index_type (type_name (), type[0]); |
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336 break; |
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337 |
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338 default: |
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339 panic_impossible (); |
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340 } |
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341 } |
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342 else |
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343 gripe_failed_assignment (); |
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344 |
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345 return retval; |
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346 } |
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347 |
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348 void |
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3523
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349 octave_struct::print (std::ostream& os, bool) const |
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2901
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350 { |
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351 print_raw (os); |
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352 } |
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353 |
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354 void |
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3523
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355 octave_struct::print_raw (std::ostream& os, bool) const |
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356 { |
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357 // XXX FIXME XXX -- would be nice to print the output in some |
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358 // standard order. Maybe all substructures first, maybe |
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359 // alphabetize entries, etc. |
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360 |
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2985
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361 unwind_protect::begin_frame ("octave_struct_print"); |
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362 |
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363 unwind_protect_int (Vstruct_levels_to_print); |
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364 |
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3961
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365 if (Vstruct_levels_to_print >= 0) |
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366 { |
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367 bool print_keys_only = (Vstruct_levels_to_print == 0); |
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368 |
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369 Vstruct_levels_to_print--; |
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370 |
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2901
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371 indent (os); |
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372 os << "{"; |
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373 newline (os); |
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374 |
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2901
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375 increment_indent_level (); |
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376 |
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4561
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377 int n = map.numel (); |
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378 |
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4604
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379 if (n > 1 && print_keys_only) |
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380 { |
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381 indent (os); |
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382 dim_vector dv = dims (); |
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383 os << dv.str () << " struct array containing the fields:"; |
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384 newline (os); |
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385 newline (os); |
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386 |
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387 increment_indent_level (); |
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388 } |
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389 |
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4219
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390 for (Octave_map::const_iterator p = map.begin (); p != map.end (); p++) |
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391 { |
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3523
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392 std::string key = map.key (p); |
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4513
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393 Cell val = map.contents (p); |
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394 |
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4499
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395 octave_value tmp = (n == 1) ? val(0) : octave_value (val, true); |
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3961
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396 |
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397 if (print_keys_only) |
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3932
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398 { |
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3961
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399 indent (os); |
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4604
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400 os << key; |
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401 if (n == 1) |
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402 { |
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403 dim_vector dv = tmp.dims (); |
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404 os << ": " << dv.str () << " " << tmp.type_name (); |
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405 } |
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3961
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406 newline (os); |
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3932
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407 } |
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3961
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408 else |
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4121
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409 tmp.print_with_name (os, key); |
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2376
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410 } |
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411 |
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4604
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412 if (n > 1 && print_keys_only) |
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413 decrement_indent_level (); |
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414 |
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2901
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415 decrement_indent_level (); |
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416 |
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2901
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417 indent (os); |
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418 os << "}"; |
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419 newline (os); |
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2376
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420 } |
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421 else |
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2901
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422 { |
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3961
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423 indent (os); |
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424 os << "<structure>"; |
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2901
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425 newline (os); |
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426 } |
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2376
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427 |
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2985
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428 unwind_protect::run_frame ("octave_struct_print"); |
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2376
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429 } |
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430 |
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2901
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431 bool |
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3523
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432 octave_struct::print_name_tag (std::ostream& os, const std::string& name) const |
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2901
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433 { |
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3961
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434 bool retval = false; |
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435 |
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2901
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436 indent (os); |
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3961
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437 |
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438 if (Vstruct_levels_to_print < 0) |
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439 os << name << " = "; |
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440 else |
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441 { |
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442 os << name << " ="; |
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443 newline (os); |
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444 retval = true; |
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445 } |
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446 |
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447 return retval; |
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2901
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448 } |
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449 |
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4358
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450 DEFUN (isstruct, args, , |
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451 "-*- texinfo -*-\n\ |
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452 @deftypefn {Built-in Function} {} isstruct (@var{expr})\n\ |
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453 Return 1 if the value of the expression @var{expr} is a structure.\n\ |
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454 @end deftypefn") |
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455 { |
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456 octave_value retval; |
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457 |
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458 if (args.length () == 1) |
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459 retval = args(0).is_map (); |
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460 else |
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461 print_usage ("isstruct"); |
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462 |
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463 return retval; |
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464 } |
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465 |
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466 DEFUN (fieldnames, args, , |
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467 "-*- texinfo -*-\n\ |
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468 @deftypefn {Built-in Function} {} fieldnames (@var{struct})\n\ |
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469 Return a cell array of strings naming the elements of the structure\n\ |
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470 @var{struct}. It is an error to call @code{fieldnames} with an\n\ |
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471 argument that is not a structure.\n\ |
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472 @end deftypefn") |
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473 { |
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474 octave_value retval; |
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475 |
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|
476 int nargin = args.length (); |
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477 |
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|
478 if (nargin == 1) |
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|
479 { |
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|
480 if (args(0).is_map ()) |
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481 { |
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482 Octave_map m = args(0).map_value (); |
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483 retval = Cell (m.keys ()); |
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484 } |
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485 else |
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486 gripe_wrong_type_arg ("fieldnames", args(0)); |
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487 } |
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488 else |
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489 print_usage ("fieldnames"); |
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490 |
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491 return retval; |
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492 } |
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493 |
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494 DEFUN (isfield, args, , |
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495 "-*- texinfo -*-\n\ |
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496 @deftypefn {Built-in Function} {} isfield (@var{expr}, @var{name})\n\ |
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497 Return true if the expression @var{expr} is a structure and it includes an\n\ |
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498 element named @var{name}. The first argument must be a structure and\n\ |
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499 the second must be a string.\n\ |
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500 @end deftypefn") |
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501 { |
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502 octave_value retval; |
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|
503 |
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|
504 int nargin = args.length (); |
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505 |
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506 if (nargin == 2) |
|
|
507 { |
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508 retval = false; |
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|
509 |
|
|
510 // XXX FIXME XXX -- should this work for all types that can do |
|
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511 // structure reference operations? |
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|
512 |
|
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513 if (args(0).is_map () && args(1).is_string ()) |
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|
514 { |
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|
515 std::string key = args(1).string_value (); |
|
|
516 |
|
|
517 Octave_map m = args(0).map_value (); |
|
|
518 |
|
|
519 retval = m.contains (key) != 0; |
|
|
520 } |
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521 else |
|
|
522 print_usage ("isfield"); |
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|
523 } |
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|
524 else |
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|
525 print_usage ("isfield"); |
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|
526 |
|
|
527 return retval; |
|
|
528 } |
|
|
529 |
|
2376
|
530 /* |
|
|
531 ;;; Local Variables: *** |
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|
532 ;;; mode: C++ *** |
|
|
533 ;;; End: *** |
|
|
534 */ |
