apps/plugins/lua/rocklib_aux.pl

   1 #!/usr/bin/env perl
   2 ############################################################################
   3 #             __________               __   ___.
   4 #   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   5 #   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   6 #   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   7 #   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   8 #                     \/            \/     \/    \/            \/
   9 # $Id$
  10 #
  11 # Copyright (C) 2009 by Maurus Cuelenaere
  12 #
  13 # All files in this archive are subject to the GNU General Public License.
  14 # See the file COPYING in the source tree root for full license agreement.
  15 #
  16 # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  17 # KIND, either express or implied.
  18 #
  19 ############################################################################
  20
  21 sub trim
  22 {
  23     my $text = $_[0];
  24     $text =~ s/^\s+//;
  25     $text =~ s/\s+$//;
  26     return $text;
  27 }
  28
  29 sub rand_string
  30 {
  31     my @chars=('a'..'z');
  32     my $ret;
  33     foreach (1..5)
  34     {
  35         $ret .= $chars[rand @chars];
  36     }
  37     return $ret;
  38 }
  39
  40
  41 my @functions;
  42 my @ported_functions;
  43 my @forbidden_functions = ('^open$',
  44                            '^close$',
  45                            '^read$',
  46                            '^write$',
  47                            '^lseek$',
  48                            '^ftruncate$',
  49                            '^filesize$',
  50                            '^fdprintf$',
  51                            '^read_line$',
  52                            '^[a-z]+dir$',
  53                            '^__.+$',
  54                            '^.+_(un)?cached$',
  55                            '^audio_play$');
  56
  57 my $rocklib = sprintf("%s/rocklib.c", $ARGV[0]);
  58 open ROCKLIB, "<$rocklib" or die("Couldn't open $rocklib: $!");
  59 while(<ROCKLIB>)
  60 {
  61     if(/^RB_WRAP\(([^)]+)\)/)
  62     {
  63         push(@ported_functions, $1);
  64     }
  65 }
  66 close ROCKLIB;
  67
  68 # Parse plugin.h
  69 my $start = 0;
  70 while(<STDIN>)
  71 {
  72     if(/struct plugin_api \{/)
  73     {
  74         $start = 1;
  75     }
  76     elsif($start && /\};/)
  77     {
  78         $start = 0;
  79     }
  80
  81     if($start == 1)
  82     {
  83         my $line = $_;
  84         while($line !~ /;/)
  85         {
  86             $line .= <STDIN>;
  87         }
  88
  89         $line =~ s/(\n|\r)//g;
  90
  91         if($line =~ /([a-zA-Z *_]+)?\s?\(\*([^)]+)?\)\(([^)]+)\).*?;/)
  92         {
  93             $return_type = $1;
  94             $name = $2;
  95             $arguments = $3;
  96
  97             $return_type = trim($return_type);
  98             $arguments =~ s/\s{2,}/ /g;
  99
 100             if( !grep($_ eq $name, @ported_functions) &&
 101                 !grep($name =~ $_, @forbidden_functions))
 102             {
 103                 push(@functions, {'name' => $name, 'return' => $return_type, 'arg' => $arguments});
 104             }
 105         }
 106     }
 107 }
 108
 109 my $svnrev = '$Revision$';
 110
 111 # Print the header
 112 print <<EOF
 113 /* Automatically generated of $svnrev from rocklib.c & plugin.h */
 114
 115 #define lrocklib_c
 116 #define LUA_LIB
 117
 118 #define _ROCKCONF_H_ /* We don't need strcmp() etc. wrappers */
 119 #include "lua.h"
 120 #include "lauxlib.h"
 121 #include "plugin.h"
 122
 123 EOF
 124 ;
 125
 126 my %in_types = ('void' => \&in_void,
 127                 'int' => \&in_int,
 128                 'unsigned' => \&in_int,
 129                 'unsignedint' => \&in_int,
 130                 'signed' => \&in_int,
 131                 'signedint' => \&in_int,
 132                 'short' => \&in_int,
 133                 'unsignedshort' => \&in_int,
 134                 'signedshort' => \&in_int,
 135                 'long' => \&in_int,
 136                 'unsignedlong' => \&in_int,
 137                 'signedlong' => \&in_int,
 138                 'char' => \&in_int,
 139                 'unsignedchar' => \&in_int,
 140                 'signedchar' => \&in_int,
 141                 'size_t' => \&in_int,
 142                 'ssize_t' => \&in_int,
 143                 'off_t' => \&in_int,
 144                 'char*' => \&in_string,
 145                 'signedchar*' => \&in_string,
 146                 'unsignedchar*' => \&in_string,
 147                 'bool' => \&in_bool,
 148                 '_Bool' => \&in_bool
 149 ), %out_types = ('void' => \&out_void,
 150                  'int' => \&out_int,
 151                  'unsigned' => \&out_int,
 152                  'unsignedint' => \&out_int,
 153                  'signed' => \&out_int,
 154                  'signedint' => \&out_int,
 155                  'short' => \&out_int,
 156                  'unsignedshort' => \&out_int,
 157                  'signedshort' => \&out_int,
 158                  'long' => \&out_int,
 159                  'unsignedlong' => \&out_int,
 160                  'signedlong' => \&out_int,
 161                  'char' => \&out_int,
 162                  'unsignedchar' => \&out_int,
 163                  'signedchar' => \&out_int,
 164                  'size_t' => \&out_int,
 165                  'ssize_t' => \&out_int,
 166                  'off_t' => \&out_int,
 167                  'char*' => \&out_string,
 168                  'signedchar*' => \&out_string,
 169                  'unsignedchar*' => \&out_string,
 170                  'bool' => \&out_bool,
 171                  '_Bool' => \&out_bool
 172 );
 173
 174 sub in_void
 175 {
 176     return "\t(void)L;\n";
 177 }
 178
 179 sub in_int
 180 {
 181     my ($name, $type, $pos) = @_;
 182     return sprintf("\t%s %s = (%s) luaL_checkint(L, %d);\n", $type, $name, $type, $pos);
 183 }
 184
 185 sub in_string
 186 {
 187     my ($name, $type, $pos) = @_;
 188     return sprintf("\t%s %s = (%s) luaL_checkstring(L, %d);\n", $type, $name, $type, $pos)
 189 }
 190
 191 sub in_bool
 192 {
 193     my ($name, $type, $pos) = @_;
 194     return sprintf("\tbool %s = luaL_checkboolean(L, %d);\n", $name, $pos)
 195 }
 196
 197 sub out_void
 198 {
 199     my $name = $_[0];
 200     return sprintf("\t%s;\n\treturn 0;\n", $name);
 201 }
 202
 203 sub out_int
 204 {
 205     my ($name, $type) = @_;
 206     return sprintf("\t%s result = %s;\n\tlua_pushinteger(L, result);\n\treturn 1;\n", $type, $name);
 207 }
 208
 209 sub out_string
 210 {
 211     my ($name, $type) = @_;
 212     return sprintf("\t%s result = %s;\n\tlua_pushstring(L, result);\n\treturn 1;\n", $type, $name);
 213 }
 214
 215 sub out_bool
 216 {
 217     my ($name, $type) = @_;
 218     return sprintf("\tbool result = %s;\n\tlua_pushboolean(L, result);\n\treturn 1;\n", $name);
 219 }
 220
 221 # Print the functions
 222 my @valid_functions;
 223 foreach my $function (@functions)
 224 {
 225     my $valid = 1, @arguments = ();
 226     # Check for supported arguments
 227     foreach my $argument (split(/,/, @$function{'arg'}))
 228     {
 229         $argument = trim($argument);
 230         if($argument !~ /\[.+\]/ && ($argument =~ /^(.+[\s*])([^[*\s]*)/
 231                                      || $argument eq "void"))
 232         {
 233             my $literal_type, $type, $name;
 234             if($argument eq "void")
 235             {
 236                 $literal_type = "void", $type = "void", $name = "";
 237             }
 238             else
 239             {
 240                 $literal_type = trim($1), $name = trim($2), $type = trim($1);
 241                 $type =~ s/(\s|const)//g;
 242
 243                 if($name eq "")
 244                 {
 245                     $name = rand_string();
 246                 }
 247             }
 248
 249             #printf "/* %s: %s|%s */\n", @$function{'name'}, $type, $name;
 250             if(!defined $in_types{$type})
 251             {
 252                 $valid = 0;
 253                 break;
 254             }
 255
 256             push(@arguments, {'name' => $name,
 257                               'type' => $type,
 258                               'literal_type' => $literal_type
 259                              });
 260         }
 261         else
 262         {
 263             $valid = 0;
 264             break;
 265         }
 266     }
 267
 268     # Check for supported return value
 269     my $return = @$function{'return'};
 270     $return =~ s/(\s|const)//g;
 271     #printf "/* %s: %s [%d] */\n", @$function{'name'}, $return, $valid;
 272     if(!defined $out_types{$return})
 273     {
 274         $valid = 0;
 275     }
 276
 277     if($valid == 1)
 278     {
 279         # Print the header
 280         printf "static int rock_%s(lua_State *L)\n".
 281             "{\n",
 282             @$function{'name'};
 283
 284         # Print the arguments
 285         my $i = 1;
 286         foreach my $argument (@arguments)
 287         {
 288             print $in_types{@$argument{'type'}}->(@$argument{'name'}, @$argument{'literal_type'}, $i++);
 289         }
 290
 291         # Generate the arguments string
 292         my $func_args = $arguments[0]{'name'};
 293         for(my $i = 1; $i < $#arguments + 1; $i++)
 294         {
 295             $func_args .= ", ".$arguments[$i]{'name'};
 296         }
 297
 298         # Print the function call
 299         my $func = sprintf("rb->%s(%s)", @$function{'name'}, $func_args);
 300
 301         # Print the footer
 302         print $out_types{$return}->($func, @$function{'return'});
 303         print "}\n\n";
 304
 305         push(@valid_functions, $function);
 306     }
 307 }
 308
 309 # Print the C array
 310 print "const luaL_Reg rocklib_aux[] =\n{\n";
 311 foreach my $function (@valid_functions)
 312 {
 313     printf "\t{\"%s\", rock_%s},\n", @$function{'name'}, @$function{'name'};
 314 }
 315 print "\t{NULL, NULL}\n};\n\n";