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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if defined (__GNUG__) |
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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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31 #include <iostream.h> |
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32 |
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33 #include "lo-utils.h" |
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34 |
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35 #include "defun.h" |
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36 #include "error.h" |
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37 #include "help.h" |
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38 #include "ov-list.h" |
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39 #include "unwind-prot.h" |
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40 |
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41 octave_allocator |
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42 octave_list::allocator (sizeof (octave_list)); |
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43 |
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44 int |
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45 octave_list::t_id (-1); |
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46 |
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47 const string |
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48 octave_list::t_name ("list"); |
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49 |
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50 octave_value |
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51 octave_list::index (const octave_value_list& idx) const |
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52 { |
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53 octave_value retval; |
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54 |
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55 if (idx.length () == 1) |
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56 { |
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57 double d = idx(0).double_value (); |
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58 |
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59 if (! error_state) |
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60 { |
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61 if (D_NINT (d) == d) |
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62 { |
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63 int n = lst.length (); |
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64 |
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65 int i = static_cast<int> (d); |
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66 |
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67 if (i > 0 && i <= n) |
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68 retval = lst(i-1); |
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69 else |
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70 error ("list index = %d out of range", i); |
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71 } |
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72 else |
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73 error ("list index must be an integer"); |
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74 } |
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75 } |
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76 else |
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77 error ("lists may only be indexed by a single scalar"); |
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78 |
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79 return retval; |
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80 } |
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81 |
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82 void |
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83 octave_list::print (ostream& os, bool) const |
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84 { |
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85 print_raw (os); |
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86 } |
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87 |
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88 void |
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89 octave_list::print_raw (ostream& os, bool) const |
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90 { |
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91 begin_unwind_frame ("octave_list_print"); |
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92 |
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93 newline (os); |
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94 indent (os); |
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95 os << "("; |
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96 newline (os); |
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97 |
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98 increment_indent_level (); |
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99 |
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100 int n = lst.length (); |
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101 |
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102 for (int i = 0; i < n; i++) |
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103 { |
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104 octave_value val = lst(i); |
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105 |
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106 val.print (os); |
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107 } |
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108 |
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109 decrement_indent_level (); |
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110 |
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111 indent (os); |
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112 os << ")"; |
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113 newline (os); |
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114 |
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115 run_unwind_frame ("octave_list_print"); |
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116 } |
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117 |
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118 bool |
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119 octave_list::print_name_tag (ostream& os, const string& name) const |
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120 { |
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121 indent (os); |
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122 os << name << " ="; |
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123 return false; |
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124 } |
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125 |
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126 DEFUN (make_list, args, , |
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127 "make_list (ARGS)\n\ |
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128 \n\ |
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129 Create a new list from ARGS.") |
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130 { |
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131 return octave_value (args); |
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132 } |
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133 |
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134 DEFUN (append, args, , |
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135 "append (LIST, ARGS)\n\ |
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136 \n\ |
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137 Return a new list created by appending ARGS to LIST") |
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138 { |
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139 octave_value retval; |
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140 |
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141 int nargin = args.length (); |
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142 |
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143 if (nargin > 1) |
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144 { |
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145 octave_value_list tmp = args(0).list_value (); |
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146 |
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147 if (! error_state) |
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148 { |
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149 for (int i = 1; i < nargin; i++) |
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150 tmp.append (args(i)); |
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151 |
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152 retval = tmp; |
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153 } |
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154 } |
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155 else |
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156 print_usage ("append"); |
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157 |
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158 return retval; |
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159 } |
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160 |
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161 DEFUN (reverse, args, , |
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162 "reverse (LIST)\n\ |
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163 \n\ |
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164 Return a new list created by reversing the elements of LIST") |
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165 { |
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166 octave_value retval; |
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167 |
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168 int nargin = args.length (); |
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169 |
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170 if (nargin == 1) |
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171 { |
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172 octave_value_list tmp = args(0).list_value (); |
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173 |
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174 if (! error_state) |
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175 retval = tmp.reverse (); |
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176 } |
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177 else |
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178 print_usage ("reverse"); |
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179 |
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180 return retval; |
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181 } |
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182 |
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183 /* |
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184 ;;; Local Variables: *** |
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185 ;;; mode: C++ *** |
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186 ;;; End: *** |
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187 */ |
