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1 // defun.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_defun_h) |
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25 #define octave_defun_h 1 |
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26 |
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27 #if defined (octave_defun_dld_h) |
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28 #error defun.h and defun-dld.h both included in same file! |
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29 #endif |
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30 |
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31 #include "defun-int.h" |
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32 |
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33 // Define a builtin variable. |
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34 // |
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35 // name is the name of the variable, as a string. |
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36 // |
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37 // sname is the name of the structure that is used to hold |
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38 // information about the variable, and that is passed to |
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39 // install_builtin_variable to register it in the symbol table. |
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40 // By convention, it is constructed by prefixing name with the |
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41 // character S. |
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42 // |
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43 // ins_as_fcn is a flag that says whether to install the variable as |
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44 // if it were a function (allowing the name to also be used as a |
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45 // variable by users, but recover its original definition if cleared). |
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46 // |
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47 // eternal is a flag that says whether it should be possible to |
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48 // clear the variable. Most builtin variables are eternal, and |
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49 // cannot be cleared. |
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50 // |
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51 // sv_fcn is a pointer to a function that should be called whenever |
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52 // this variable is given a new value. It can be 0 if there is no |
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53 // function to call. See also the code in user-prefs.cc. |
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54 // |
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55 // doc is the simple help text for this variable. |
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56 |
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57 #define DEFVAR(name, sname, defn, inst_as_fcn, protect, \ |
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58 eternal, sv_fcn, doc) \ |
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59 do \ |
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60 { \ |
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61 builtin_variable sname = \ |
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62 { \ |
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63 name, \ |
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64 new tree_constant (defn), \ |
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65 inst_as_fcn, \ |
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66 protect, \ |
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67 eternal, \ |
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68 sv_fcn, \ |
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69 doc, \ |
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70 }; \ |
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71 install_builtin_variable (&sname); \ |
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72 } \ |
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73 while (0) |
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74 |
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75 // Define a builtin function. |
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76 // |
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77 // name is the name of the function, as a string. |
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78 // |
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79 // fname is the name of the C++ function. By convention, it is |
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80 // constructed by prefixing name with the character F. |
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81 // |
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82 // sname is the name of the structure that is used to hold |
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83 // information about the function, and that is passed to |
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84 // install_builtin_function to register the function in the symbol |
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85 // table. By convention, it is constructed by prefixing name with |
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86 // the character S. |
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87 // |
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88 // nargin_max is the maximum number of arguments this function can |
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89 // accept. XXX FIXME XXX -- is this really used now? |
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90 // |
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91 // nargout_max is the maximum number of outputs this function can |
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92 // produce. XXX FIXME XXX -- is this really used now? |
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93 // |
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94 // doc is the simple help text for the function. |
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95 |
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96 #define DEFUN(name, fname, sname, nargin_max, nargout_max, doc) \ |
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97 DEFUN_INTERNAL (name, fname, sname, nargin_max, nargout_max, 0, doc) |
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98 |
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99 // Define a builtin text-style function. |
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100 // |
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101 // This is like DEFUN, except that it defines a function that can be |
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102 // called from the Octave language without using parenthesis to |
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103 // surround the arguments). |
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104 |
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105 #define DEFUN_TEXT(name, fname, sname, nargin_max, nargout_max, doc) \ |
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106 DEFUN_INTERNAL (name, fname, sname, nargin_max, nargout_max, 1, doc) |
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107 |
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108 // Define a mapper function. |
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109 // |
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110 // name is the name of the function as a string |
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111 // |
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112 // sname is the name of the structure that is used to hold |
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113 // information about the function, and that is passed to |
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114 // install_builtin_mapper to register the function in the symbol |
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115 // table. By convention, it is constructed by prefixing name with |
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116 // the character S. |
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117 // |
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118 // can_ret_cmplx_for_real is a flag that says whether this function |
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119 // can create a complex number given a real-valued argument |
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120 // (e.g., sqrt (-1)). |
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121 // |
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122 // lo is the lower bound of the range for which real arguments can |
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123 // become complex. (e.g., lo == -Inf for sqrt). |
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124 // |
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125 // hi is the upper bound of the range for which real arguments can |
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126 // become complex. (e.g., hi == 0 for sqrt). |
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127 // |
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128 // d_d_map is a pointer to a function that should be called for real |
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129 // arguments that are expected to create real results. |
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130 // |
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131 // d_c_map is a pointer to a function that should be called for real |
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132 // arguments that are expected to create complex results. |
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133 // |
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134 // c_c_map is a pointer to a function that should be called for |
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135 // complex arguments that are expected to create complex results. |
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136 // |
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137 // doc is the simple help text for the function. |
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138 |
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139 #define DEFUN_MAPPER(name, sname, can_ret_cmplx_for_real, lo, hi, \ |
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140 d_d_map, d_c_map, c_c_map, doc) \ |
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141 do \ |
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142 { \ |
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143 builtin_mapper_function sname = \ |
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144 { \ |
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145 name, \ |
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146 can_ret_cmplx_for_real, \ |
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147 lo, \ |
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148 hi, \ |
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149 d_d_map, \ |
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150 d_c_map, \ |
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151 c_c_map, \ |
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152 doc, \ |
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153 }; \ |
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154 install_builtin_mapper (&sname); \ |
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155 } \ |
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156 while (0) |
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157 |
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158 // Make alias another name for the existing function name. This macro |
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159 // must be used in the same file where name is defined, after the |
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160 // definition for name. |
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161 |
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162 #define DEFALIAS(name, alias) DEFALIAS_INTERNAL (name, alias) |
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163 |
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164 #endif |
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165 |
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166 /* |
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167 ;;; Local Variables: *** |
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168 ;;; mode: C++ *** |
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169 ;;; page-delimiter: "^/\\*" *** |
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170 ;;; End: *** |
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171 */ |
