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4933
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1 /* |
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2 |
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3 Copyright (C) 2004 David Bateman |
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4 |
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5 This program is free software; you can redistribute it and/or modify it |
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6 under the terms of the GNU General Public License as published by |
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7 the Free Software Foundation; either version 2, or (at your option) |
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8 any later version. |
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9 |
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10 This program is distributed in the hope that it will be useful, but |
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11 WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU General Public License |
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16 along with Octave; see the file COPYING. If not, write to the Free |
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17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 02111-1307, USA. |
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19 |
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20 In addition to the terms of the GPL, you are permitted to link |
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21 this program with any Open Source program, as defined by the |
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22 Open Source Initiative (www.opensource.org) |
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23 |
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24 */ |
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25 |
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26 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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27 #pragma implementation |
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28 #endif |
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29 |
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30 #ifdef HAVE_CONFIG_H |
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31 #include <config.h> |
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32 #endif |
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33 |
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34 #include <iostream> |
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35 |
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36 #include "defun.h" |
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37 #include "error.h" |
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38 #include "gripes.h" |
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39 #include "oct-map.h" |
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40 #include "ov-base.h" |
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41 #include "ov-fcn-inline.h" |
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42 #include "pr-output.h" |
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43 #include "variables.h" |
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44 #include "parse.h" |
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45 |
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46 DEFINE_OCTAVE_ALLOCATOR (octave_fcn_inline); |
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47 |
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48 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_fcn_inline, |
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49 "inline function", |
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50 "inline function"); |
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51 |
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52 octave_fcn_inline::octave_fcn_inline (const std::string& f, |
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53 const string_vector& a, |
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54 const std::string& n) |
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55 : octave_fcn_handle (0, n), iftext (f), ifargs (a) |
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56 { |
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57 // Find a function name that isn't already in the symbol table. |
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58 |
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59 std::string fname = "__inline__"; |
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60 |
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61 while (symbol_exist (fname)) |
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62 fname.append ("X"); |
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63 |
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64 // Form a string representing the function. |
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65 |
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66 OSSTREAM buf; |
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67 |
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68 buf << "function __retval__ = " << fname << "("; |
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69 |
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70 for (int i = 0; i < ifargs.length (); i++) |
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71 { |
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72 if (i > 0) |
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73 buf << ", "; |
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74 |
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75 buf << ifargs(i); |
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76 } |
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77 |
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78 buf << ")\n __retval__ = " << iftext << ";\nendfunction" << OSSTREAM_ENDS; |
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79 |
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80 // Parse this function and create a user function. |
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81 |
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82 octave_value eval_args (OSSTREAM_STR (buf)); |
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83 |
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84 feval ("eval", eval_args, 0); |
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85 |
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86 OSSTREAM_FREEZE (buf); |
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87 |
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88 octave_value tmp = lookup_function (fname); |
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89 |
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90 if (tmp.is_function ()) |
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91 { |
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92 fcn = tmp; |
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93 |
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94 // XXX FIXME XXX -- probably shouldn't be directly altering the |
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95 // symbol table here. |
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96 |
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97 fbi_sym_tab->clear_function (fname); |
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98 } |
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99 else |
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100 error ("inline: unable to define function"); |
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101 } |
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102 |
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103 void |
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104 octave_fcn_inline::print (std::ostream& os, bool pr_as_read_syntax) const |
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105 { |
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106 print_raw (os, pr_as_read_syntax); |
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107 newline (os); |
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108 } |
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109 |
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110 void |
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111 octave_fcn_inline::print_raw (std::ostream& os, bool pr_as_read_syntax) const |
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112 { |
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113 OSSTREAM buf; |
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114 |
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115 if (nm.empty ()) |
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116 buf << "f("; |
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117 else |
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118 buf << nm << "("; |
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119 |
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120 for (int i = 0; i < ifargs.length (); i++) |
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121 { |
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122 if (i) |
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123 buf << ", "; |
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124 |
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125 buf << ifargs(i); |
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126 } |
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127 |
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128 buf << ") = " << iftext << OSSTREAM_ENDS; |
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129 |
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130 octave_print_internal (os, OSSTREAM_STR (buf), pr_as_read_syntax, |
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131 current_print_indent_level ()); |
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132 OSSTREAM_FREEZE (buf); |
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133 } |
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134 |
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135 octave_value |
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136 octave_fcn_inline::convert_to_str_internal (bool, bool) const |
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137 { |
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138 return octave_value (fcn_text ()); |
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139 } |
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140 |
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141 DEFUN (inline, args, , |
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142 "-*- texinfo -*-\n\ |
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143 @deftypefn {Built-in Function} {} inline (@var{str})\n\ |
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144 @deftypefnx {Built-in Function} {} inline (@var{str}, @var{arg1}, ...)\n\ |
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145 @deftypefnx {Built-in Function} {} inline (@var{str}, @var{n})\n\ |
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146 Create an inline function from the character string @var{str}.\n\ |
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147 If called with a single argument, the generated function is\n\ |
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148 assumed to have a single argument and will be defined\n\ |
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149 as the first isolated lower case character, except i or j.\n\ |
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150 \n\ |
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151 If the second and subsequent arguments are character strings,\n\ |
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152 they are the names of the arguments of the function.\n\ |
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153 \n\ |
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154 If the second argument is an integer @var{n}, the arguments are\n\ |
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155 @code{\"x\"}, @code{\"P1\"}, @dots{}, @code{\"P@var{N}\"}.\n\ |
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156 @end deftypefn\n\ |
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157 @seealso{argnames, formula, vectorize}") |
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158 { |
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159 octave_value retval; |
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160 |
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161 int nargin = args.length (); |
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162 |
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163 if (nargin > 0) |
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164 { |
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165 std::string fun = args(0).string_value (); |
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166 |
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167 if (! error_state) |
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168 { |
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169 string_vector fargs; |
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170 |
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171 if (nargin == 1) |
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172 { |
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173 fargs.resize (1); |
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174 |
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175 // Find the first isolated string as the argument of the |
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176 // function. |
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177 |
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178 // XXX FIXME XXX -- use just "x" for now. |
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179 fargs(0) = "x"; |
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180 } |
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181 else if (nargin == 2 && args(1).is_numeric_type ()) |
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182 { |
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183 int n = args(1).int_value (); |
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184 |
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185 if (! error_state) |
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186 { |
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187 if (n >= 0) |
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188 { |
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189 fargs.resize (n+1); |
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190 |
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191 fargs(0) = "x"; |
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192 |
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193 for (int i = 1; i < n+1; i++) |
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194 { |
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195 OSSTREAM buf; |
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196 buf << "P" << i << OSSTREAM_ENDS; |
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197 fargs(i) = OSSTREAM_STR (buf); |
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198 OSSTREAM_FREEZE (buf); |
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199 } |
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200 } |
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201 else |
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202 { |
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203 error ("inline: numeric argument must be nonnegative"); |
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204 return retval; |
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205 } |
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206 } |
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207 else |
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208 { |
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209 error ("inline: expecting second argument to be an integer"); |
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210 return retval; |
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211 } |
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212 } |
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213 else |
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214 { |
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215 fargs.resize (nargin - 1); |
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216 |
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217 for (int i = 1; i < nargin; i++) |
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218 { |
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219 std::string s = args(i).string_value (); |
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220 |
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221 if (! error_state) |
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222 fargs(i-1) = s; |
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223 else |
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224 { |
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225 error ("inline: expecting string arguments"); |
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226 return retval; |
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227 } |
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228 } |
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229 } |
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230 |
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231 retval = octave_value (new octave_fcn_inline (fun, fargs)); |
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232 } |
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233 else |
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234 error ("inline: first argument must be a string"); |
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235 } |
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236 else |
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237 print_usage ("inline"); |
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238 |
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239 return retval; |
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240 } |
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241 |
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242 DEFUN (formula, args, , |
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243 "-*- texinfo -*-\n\ |
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244 @deftypefn {Built-in Function} {} formula (@var{fun})\n\ |
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245 Return a character string representing the inline function @var{fun}.\n\ |
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246 Note that @code{char (@var{fun})} is equivalent to\n\ |
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247 @code{formula (@var{fun})}.\n\ |
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248 @end deftypefn\n\ |
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249 @seealso{argnames, inline, vectorize}") |
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250 { |
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251 octave_value retval; |
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252 |
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253 int nargin = args.length (); |
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254 |
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255 if (nargin == 1) |
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256 { |
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257 octave_fcn_inline* fn = args(0).fcn_inline_value (true); |
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258 |
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259 if (fn) |
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260 retval = octave_value (fn->fcn_text ()); |
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261 else |
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262 error ("formula: must be an inline function"); |
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263 } |
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264 else |
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265 print_usage ("formula"); |
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266 |
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267 return retval; |
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268 } |
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269 |
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270 DEFUN (argnames, args, , |
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271 "-*- texinfo -*-\n\ |
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272 @deftypefn {Built-in Function} {} argnames (@var{fun})\n\ |
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273 Return a cell array of character strings containing the names of\n\ |
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274 the arguments of the inline function @var{fun}.\n\ |
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275 @end deftypefn\n\ |
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276 @seealso{argnames, inline, formula, vectorize}") |
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277 { |
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278 octave_value retval; |
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279 |
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280 int nargin = args.length (); |
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281 |
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282 if (nargin == 1) |
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283 { |
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284 octave_fcn_inline *fn = args(0).fcn_inline_value (true); |
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285 |
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286 if (fn) |
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287 { |
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288 string_vector t1 = fn->fcn_arg_names (); |
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289 |
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290 Cell t2 (dim_vector (t1.length (), 1)); |
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291 |
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292 for (int i = 0; i < t1.length (); i++) |
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293 t2(i) = t1(i); |
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294 |
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295 retval = t2; |
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296 } |
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297 else |
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298 error ("argnames: argument must be an inline function"); |
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299 } |
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300 else |
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301 print_usage ("argnames"); |
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302 |
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303 return retval; |
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304 } |
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305 |
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306 DEFUN (vectorize, args, , |
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307 "-*- texinfo -*-\n\ |
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308 @deftypefn {Built-in Function} {} argnames (@var{fun})\n\ |
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309 Create a vectorized version of the inline function @var{fun}\n\ |
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310 by replacing all occurrences of @code{*}, @code{/}, etc., with\n\ |
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311 @code{.*}, @code{./}, etc.\n\ |
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312 @end deftypefn\n\ |
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313 @seealso{argnames, inline, formula, vectorize}") |
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314 { |
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315 octave_value retval; |
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316 |
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317 int nargin = args.length (); |
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318 |
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319 if (nargin == 1) |
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320 { |
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321 octave_fcn_inline* old = args(0).fcn_inline_value (true); |
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322 |
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323 if (old) |
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324 { |
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325 std::string old_func = old->fcn_text (); |
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326 std::string new_func; |
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327 |
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328 size_t i = 0; |
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329 |
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330 while (i < old_func.length ()) |
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331 { |
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332 std::string t1 = old_func.substr (i, 1); |
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333 |
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334 if (t1 == "*" || t1 == "/" || t1 == "\\" || t1 == "^") |
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335 { |
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336 if (i && old_func.substr (i-1, 1) != ".") |
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337 new_func.append ("."); |
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338 |
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339 // Special case for ** operator. |
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340 if (t1 == "*" && i < (old_func.length () - 1) |
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341 && old_func.substr (i+1, 1) == "*") |
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342 { |
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343 new_func.append ("*"); |
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344 i++; |
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345 } |
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346 } |
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347 new_func.append (t1); |
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348 i++; |
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349 } |
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350 |
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351 retval = octave_value (new octave_fcn_inline (new_func, old->fcn_arg_names ())); |
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352 } |
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353 else |
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354 error ("vectorize: must be an inline function"); |
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355 } |
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356 else |
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357 print_usage ("vectorize"); |
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358 |
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359 return retval; |
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360 } |
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361 |
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362 /* |
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363 ;;; Local Variables: *** |
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364 ;;; mode: C++ *** |
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365 ;;; End: *** |
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366 */ |
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367 |
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368 |
