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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 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <sstream> |
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29 #include <iostream> |
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30 #include <string> |
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31 |
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32 #include "defun.h" |
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33 #include "dynamic-ld.h" |
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34 #include "error.h" |
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35 #include "help.h" |
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36 #include "ov.h" |
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37 #include "ov-builtin.h" |
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38 #include "ov-dld-fcn.h" |
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39 #include "ov-mapper.h" |
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40 #include "oct-obj.h" |
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41 #include "pager.h" |
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42 #include "symtab.h" |
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43 #include "variables.h" |
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44 |
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45 // FIXME -- this function could probably share some code with |
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46 // the help functions. |
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47 |
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48 void |
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49 print_usage (const std::string& nm, bool just_usage, |
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50 const std::string& extra_msg) |
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51 { |
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52 symbol_record *sym_rec = fbi_sym_tab->lookup (nm); |
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53 |
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54 if (sym_rec) |
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55 { |
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56 std::string h = sym_rec->help (); |
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57 |
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58 if (h.length () > 0) |
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59 { |
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60 std::ostringstream buf; |
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61 |
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62 buf << "\nInvalid call to " << nm << ". Correct usage is:\n\n"; |
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63 |
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64 h = extract_help_from_dispatch (nm) + h; |
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65 |
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66 display_help_text (buf, h); |
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67 |
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68 buf << extra_msg << "\n"; |
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69 |
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70 if (! just_usage) |
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71 additional_help_message (buf); |
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72 |
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73 defun_usage_message (buf.str ()); |
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74 } |
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75 } |
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76 else |
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77 warning ("no usage message found for `%s'", nm.c_str ()); |
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78 } |
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79 |
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80 void |
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81 check_version (const std::string& version, const std::string& fcn) |
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82 { |
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83 if (version != OCTAVE_API_VERSION) |
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84 { |
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85 error ("API version %s found in .oct file function `%s'\n" |
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86 " does not match the running Octave (API version %s)\n" |
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87 " this can lead to incorrect results or other failures\n" |
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88 " you can fix this problem by recompiling this .oct file", |
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89 version.c_str (), fcn.c_str (), OCTAVE_API_VERSION); |
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90 } |
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91 } |
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92 |
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93 // Install variables and functions in the symbol tables. |
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94 |
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95 void |
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96 install_builtin_mapper (octave_mapper *mf) |
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97 { |
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98 symbol_record *sym_rec = fbi_sym_tab->lookup (mf->name (), true); |
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99 |
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100 unsigned int t |
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101 = symbol_record::BUILTIN_FUNCTION | symbol_record::MAPPER_FUNCTION; |
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102 |
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103 sym_rec->unprotect (); |
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104 sym_rec->define (mf, t); |
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105 sym_rec->document (mf->doc_string ()); |
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106 sym_rec->make_eternal (); |
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107 sym_rec->protect (); |
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108 } |
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109 |
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110 void |
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111 install_builtin_function (octave_builtin::fcn f, const std::string& name, |
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112 const std::string& doc, bool is_text_fcn, |
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113 bool /* can_hide_function -- not yet implemented */) |
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114 { |
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115 symbol_record *sym_rec = fbi_sym_tab->lookup (name, true); |
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116 |
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117 unsigned int t = symbol_record::BUILTIN_FUNCTION; |
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118 |
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119 if (is_text_fcn) |
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120 t |= symbol_record::COMMAND; |
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121 |
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122 sym_rec->unprotect (); |
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123 sym_rec->define (new octave_builtin (f, name, doc), t); |
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124 sym_rec->document (doc); |
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125 sym_rec->make_eternal (); |
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126 sym_rec->protect (); |
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127 } |
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128 |
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129 void |
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130 install_dld_function (octave_dld_function::fcn f, const std::string& name, |
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131 const octave_shlib& shl, |
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132 const std::string& doc, bool is_text_fcn) |
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133 { |
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134 symbol_record *sym_rec = fbi_sym_tab->lookup (name, true); |
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135 |
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136 unsigned int t = symbol_record::DLD_FUNCTION; |
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137 |
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138 if (is_text_fcn) |
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139 t |= symbol_record::COMMAND; |
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140 |
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141 sym_rec->unprotect (); |
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142 sym_rec->define (new octave_dld_function (f, shl, name, doc), t); |
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143 sym_rec->document (doc); |
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144 |
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145 // Also insert the full name in the symbol table. This way, we can |
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146 // properly cope with changes to LOADPATH. |
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147 |
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148 symbol_record *full_sr = fbi_sym_tab->lookup (shl.file_name (), true); |
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149 |
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150 full_sr->alias (sym_rec, true); |
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151 full_sr->hide (); |
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152 } |
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153 |
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154 void |
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155 alias_builtin (const std::string& alias, const std::string& name) |
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156 { |
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157 symbol_record *sr_name = fbi_sym_tab->lookup (name); |
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158 |
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159 if (! sr_name) |
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160 panic ("can't alias to undefined name!"); |
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161 |
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162 symbol_record *sr_alias = fbi_sym_tab->lookup (alias, true); |
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163 |
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164 if (sr_alias) |
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165 sr_alias->alias (sr_name); |
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166 else |
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167 panic ("can't find symbol record for builtin function `%s'", |
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168 alias.c_str ()); |
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169 } |
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170 |
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171 #if 0 |
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172 // This is insufficient to really make it possible to define an alias |
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173 // for function. There are a number of subtle problems related to |
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174 // automatically reloading functions. |
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175 DEFUN (alias, args, , |
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176 "alias (alias, name)") |
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177 { |
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178 octave_value retval; |
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179 |
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180 int nargin = args.length (); |
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181 |
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182 if (nargin == 2) |
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183 { |
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184 string alias = args(0).string_value (); |
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185 string name = args(1).string_value (); |
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186 |
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187 if (! error_state) |
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188 { |
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189 symbol_record *sr_name = lookup_by_name (name, false); |
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190 |
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191 if (sr_name && sr_name->is_function ()) |
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192 { |
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193 symbol_record *sr_alias = fbi_sym_tab->lookup (alias, true); |
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194 |
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195 if (sr_alias) |
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196 sr_alias->alias (sr_name); |
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197 else |
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198 error ("alias: unable to insert `%s' in symbol table", |
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199 alias.c_str ()); |
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200 } |
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201 else |
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202 error ("alias: function `%s' does not exist", name.c_str ()); |
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203 } |
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204 } |
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205 else |
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206 print_usage ("alias"); |
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207 |
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208 return retval; |
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209 } |
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210 #endif |
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211 |
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212 /* |
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213 ;;; Local Variables: *** |
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214 ;;; mode: C++ *** |
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215 ;;; End: *** |
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216 */ |
