DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (b6d82b1a6b02)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
#**************************************************************************
#   Copyright (C) 2016 and later: Unicode, Inc. and others.
#   License & terms of use: http://www.unicode.org/copyright.html#License
#**************************************************************************
#**************************************************************************
#   Copyright (C) 2002-2016 International Business Machines Corporation
#   and others. All rights reserved.
#**************************************************************************
#
#  rbbicst   Compile the RBBI rule paser state table data into initialized C data.
#            Usage:
#                   cd icu/source/common
#                   perl rbbicst.pl    < rbbirpt.txt > rbbirpt.h
#                   perl rbbicst.pl -j < rbbirpt.txt > RBBIRuleParseTable.java
#
#             The output file, rbbrpt.h, is included by some of the .cpp rbbi
#             implementation files.   This perl script is NOT run as part
#             of a normal ICU build.  It is run by hand when needed, and the
#             rbbirpt.h generated file is put back into cvs.
#
#             See rbbirpt.txt for a description of the input format for this script.
#

if ($ARGV[0] eq "-j") {
    $javaOutput = 1;
    shift @ARGV;
}


$num_states = 1;     # Always the state number for the line being compiled.
$line_num  = 0;      # The line number in the input file.

$states{"pop"} = 255;    # Add the "pop"  to the list of defined state names.
                         # This prevents any state from being labelled with "pop",
                         #  and resolves references to "pop" in the next state field.

line_loop: while (<>) {
    chomp();
    $line = $_;
    @fields = split();
    $line_num++;

    # Remove # comments, which are any fields beginning with a #, plus all
    #  that follow on the line.
    for ($i=0; $i<@fields; $i++) {
        if ($fields[$i] =~ /^#/) {
            @fields = @fields[0 .. $i-1];
            last;
        }
    }
    # ignore blank lines, and those with no fields left after stripping comments..
    if (@fields == 0) {
        next;
    }

    #
    # State Label:  handling.
    #    Does the first token end with a ":"?  If so, it's the name  of a state.
    #    Put in a hash, together with the current state number,
    #        so that we can later look up the number from the name.
    #
    if (@fields[0] =~ /.*:$/) {
        $state_name = @fields[0];
        $state_name =~ s/://;        # strip off the colon from the state name.

        if ($states{$state_name} != 0) {
            print "  rbbicst: at line $line-num duplicate definition of state $state_name\n";
        }
        $states{$state_name} = $num_states;
        $stateNames[$num_states] = $state_name;

        # if the label was the only thing on this line, go on to the next line,
        # otherwise assume that a state definition is on the same line and fall through.
        if (@fields == 1) {
            next line_loop;
        }
        shift @fields;                       # shift off label field in preparation
                                             #  for handling the rest of the line.
    }

    #
    # State Transition line.
    #   syntax is this,
    #       character   [n]  target-state  [^push-state]  [function-name]
    #   where
    #      [something]   is an optional something
    #      character     is either a single quoted character e.g. '['
    #                       or a name of a character class, e.g. white_space
    #

    $state_line_num[$num_states] = $line_num;   # remember line number with each state
                                                #  so we can make better error messages later.
    #
    # First field, character class or literal character for this transition.
    #
    if ($fields[0] =~ /^'.'$/) {
        # We've got a quoted literal character.
        $state_literal_chars[$num_states] = $fields[0];
        $state_literal_chars[$num_states] =~ s/'//g;
    } else {
        # We've got the name of a character class.
        $state_char_class[$num_states] = $fields[0];
        if ($fields[0] =~ /[\W]/) {
            print "  rbbicsts:  at line $line_num, bad character literal or character class name.\n";
            print "     scanning $fields[0]\n";
            exit(-1);
        }
    }
    shift @fields;

    #
    # do the 'n' flag
    #
    $state_flag[$num_states] = $javaOutput? "false" : "FALSE";
    if ($fields[0] eq "n") {
        $state_flag[$num_states] = $javaOutput? "true": "TRUE";
        shift @fields;
    }

    #
    # do the destination state.
    #
    $state_dest_state[$num_states] = $fields[0];
    if ($fields[0] eq "") {
        print "  rbbicsts:  at line $line_num, destination state missing.\n";
        exit(-1);
    }
    shift @fields;

    #
    # do the push state, if present.
    #
    if ($fields[0] =~ /^\^/) {
        $fields[0] =~ s/^\^//;
        $state_push_state[$num_states] = $fields[0];
        if ($fields[0] eq "" ) {
            print "  rbbicsts:  at line $line_num, expected state after ^ (no spaces).\n";
            exit(-1);
        }
        shift @fields;
    }

    #
    # Lastly, do the optional action name.
    #
    if ($fields[0] ne "") {
        $state_func_name[$num_states] = $fields[0];
        shift @fields;
    }

    #
    #  There should be no fields left on the line at this point.
    #
    if (@fields > 0) {
       print "  rbbicsts:  at line $line_num, unexpected extra stuff on input line.\n";
       print "     scanning $fields[0]\n";
   }
   $num_states++;
}

#
# We've read in the whole file, now go back and output the
#   C source code for the state transition table.
#
# We read all states first, before writing anything,  so that the state numbers
# for the destination states are all available to be written.
#

#
# Make hashes for the names of the character classes and
#      for the names of the actions that appeared.
#
for ($state=1; $state < $num_states; $state++) {
    if ($state_char_class[$state] ne "") {
        if ($charClasses{$state_char_class[$state]} == 0) {
            $charClasses{$state_char_class[$state]} = 1;
        }
    }
    if ($state_func_name[$state] eq "") {
        $state_func_name[$state] = "doNOP";
    }
    if ($actions{$state_action_name[$state]} == 0) {
        $actions{$state_func_name[$state]} = 1;
    }
}

#
# Check that all of the destination states have been defined
#
#
$states{"exit"} = 0;              # Predefined state name, terminates state machine.
for ($state=1; $state<$num_states; $state++) {
   if ($states{$state_dest_state[$state]} == 0 && $state_dest_state[$state] ne "exit") {
       print "Error at line $state_line_num[$state]: target state \"$state_dest_state[$state]\" is not defined.\n";
       $errors++;
   }
   if ($state_push_state[$state] ne "" && $states{$state_push_state[$state]} == 0) {
       print "Error at line $state_line_num[$state]: target state \"$state_push_state[$state]\" is not defined.\n";
       $errors++;
   }
}

die if ($errors>0);

#
# Assign numbers to each of the character classes classes  used.
#   Sets are numbered from 128 - 250
#   The values 0-127 in the state table are used for matching
#     individual ASCII characters (the only thing that can appear in the rules.)
#   The "set" names appearing in the code below (default, etc.)  need special
#     handling because they do not correspond to a normal set of characters,
#     but trigger special handling by code in the state machine.
#
$i = 128;
foreach $setName (sort keys %charClasses) {
    if ($setName eq "default") {
        $charClasses{$setName} = 255;}
    elsif ($setName eq "escaped") {
        $charClasses{$setName} = 254;}
    elsif ($setName eq "escapedP") {
        $charClasses{$setName} = 253;}
    elsif ($setName eq "eof") {
        $charClasses{$setName} = 252;}
    else {
        # Normal (single) character class.  Number them.
        $charClasses{$setName} = $i;
        $i++;
    }
}


my ($sec, $min, $hour, , $day, $mon, $year, $wday, $yday, $isdst) = localtime;
$year += 1900;

if ($javaOutput) {
    print "/*\n";
    print " *******************************************************************************\n";
    print " * Copyright (C) 2003-$year,\n";
    print " * International Business Machines Corporation and others. All Rights Reserved.\n";
    print " *******************************************************************************\n";
    print " */\n";
    print " \n";
    print "package com.ibm.icu.text;\n";
    print " \n";
    print "/**\n";
    print " * Generated Java File.  Do not edit by hand.\n";
    print " * This file contains the state table for the ICU Rule Based Break Iterator\n";
    print " * rule parser.\n";
    print " * It is generated by the Perl script \"rbbicst.pl\" from\n";
    print " * the rule parser state definitions file \"rbbirpt.txt\".\n";
    print " * \@internal \n";
    print " *\n";
    print " */\n";

    print "class RBBIRuleParseTable\n";
    print "{\n";

     #
    # Emit the constants for the actions to be performed.
    #
    $n = 1;
    foreach $act (sort keys %actions) {
        print "     static final short $act = $n;\n";
        $n++;
    }
    print " \n";
    
    #
    # Emit constants for char class names
    #
    foreach $setName (sort keys %charClasses) {
       print "     static final short kRuleSet_$setName = $charClasses{$setName};\n";
    }
    print "\n\n";
    
    
    print "   static class RBBIRuleTableElement { \n";
    print "      short      fAction; \n";
    print "      short      fCharClass; \n";
    print "      short      fNextState; \n";
    print "      short      fPushState; \n";
    print "      boolean    fNextChar;  \n";
    print "      String     fStateName; \n";
    print "      RBBIRuleTableElement(short a, int cc, int ns, int ps, boolean nc, String sn) {  \n";
    print "      fAction = a; \n";
    print "      fCharClass = (short)cc; \n";
    print "      fNextState = (short)ns; \n";
    print "      fPushState = (short)ps; \n";
    print "      fNextChar  = nc; \n";
    print "      fStateName = sn; \n";
    print "   } \n";
    print "   }; \n";
    print "  \n";
    
    
    print "    static RBBIRuleTableElement[] gRuleParseStateTable = { \n ";
    print "      new RBBIRuleTableElement(doNOP, 0, 0,0,  true,   null )     //  0 \n";  #output the unused state 0. 
    for ($state=1; $state < $num_states; $state++) {
        print "     , new RBBIRuleTableElement($state_func_name[$state],";
        if ($state_literal_chars[$state] ne "") {
            $c = $state_literal_chars[$state];
            print("'$c', "); 
        }else {
            print " $charClasses{$state_char_class[$state]},";
        }
        print " $states{$state_dest_state[$state]},";
 
        # The push-state field is optional.  If omitted, fill field with a zero, which flags
        #   the state machine that there is no push state.
        if ($state_push_state[$state] eq "") {
            print "0, ";
        } else {
            print " $states{$state_push_state[$state]},";
        }
        print " $state_flag[$state], ";
 
        # if this is the first row of the table for this state, put out the state name.
        if ($stateNames[$state] ne "") {
            print "  \"$stateNames[$state]\") ";
        } else {
            print "  null ) ";
        }
            
        # Put out a comment showing the number (index) of this state row,
        print "    //  $state ";
        print "\n";
    }
    print " };\n";

    print "}; \n";
    
}
else
{
    #
    #  C++ Output ...
    #


    print "//---------------------------------------------------------------------------------\n";
    print "//\n";
    print "// Generated Header File.  Do not edit by hand.\n";
    print "//    This file contains the state table for the ICU Rule Based Break Iterator\n";
    print "//    rule parser.\n";
    print "//    It is generated by the Perl script \"rbbicst.pl\" from\n";
    print "//    the rule parser state definitions file \"rbbirpt.txt\".\n";
    print "//\n";
    print "//   Copyright (C) 2002-$year International Business Machines Corporation \n";
    print "//   and others. All rights reserved.  \n";
    print "//\n";
    print "//---------------------------------------------------------------------------------\n";
    print "#ifndef RBBIRPT_H\n";
    print "#define RBBIRPT_H\n";
    print "\n";
    print "#include \"unicode/utypes.h\"\n";
    print "\n";
    print "U_NAMESPACE_BEGIN\n";

    #
    # Emit the constants for indicies of Unicode Sets
    #   Define one constant for each of the character classes encountered.
    #   At the same time, store the index corresponding to the set name back into hash.
    #
    print "//\n";
    print "// Character classes for RBBI rule scanning.\n";
    print "//\n";
    foreach $setName (sort keys %charClasses) {
        if ($charClasses{$setName} < 250) {
           # Normal character class.
           print "    static const uint8_t kRuleSet_$setName = $charClasses{$setName};\n";
        }
    }
    print "\n\n";

    #
    # Emit the enum for the actions to be performed.
    #
    print "enum RBBI_RuleParseAction {\n";
    foreach $act (sort keys %actions) {
        print "    $act,\n";
    }
    print "    rbbiLastAction};\n\n";

    #
    # Emit the struct definition for transtion table elements.
    #
    print "//-------------------------------------------------------------------------------\n";
    print "//\n";
    print "//  RBBIRuleTableEl    represents the structure of a row in the transition table\n";
    print "//                     for the rule parser state machine.\n";
    print "//-------------------------------------------------------------------------------\n";
    print "struct RBBIRuleTableEl {\n";
    print "    RBBI_RuleParseAction          fAction;\n";
    print "    uint8_t                       fCharClass;       // 0-127:    an individual ASCII character\n";
    print "                                                    // 128-255:  character class index\n";
    print "    uint8_t                       fNextState;       // 0-250:    normal next-stat numbers\n";
    print "                                                    // 255:      pop next-state from stack.\n";
    print "    uint8_t                       fPushState;\n";
    print "    UBool                         fNextChar;\n";
    print "};\n\n";

    #
    # emit the state transition table
    #
    print "static const struct RBBIRuleTableEl gRuleParseStateTable[] = {\n";
    print "    {doNOP, 0, 0, 0, TRUE}\n";    # State 0 is a dummy.  Real states start with index = 1.
    for ($state=1; $state < $num_states; $state++) {
        print "    , {$state_func_name[$state],";
        if ($state_literal_chars[$state] ne "") {
            $c = $state_literal_chars[$state];
            printf(" %d /* $c */,", ord($c));   #  use numeric value, so EBCDIC machines are ok.
        }else {
            print " $charClasses{$state_char_class[$state]},";
        }
        print " $states{$state_dest_state[$state]},";

        # The push-state field is optional.  If omitted, fill field with a zero, which flags
        #   the state machine that there is no push state.
        if ($state_push_state[$state] eq "") {
            print "0, ";
        } else {
            print " $states{$state_push_state[$state]},";
        }
        print " $state_flag[$state]} ";

        # Put out a C++ comment showing the number (index) of this state row,
        #   and, if this is the first row of the table for this state, the state name.
        print "    //  $state ";
        if ($stateNames[$state] ne "") {
            print "     $stateNames[$state]";
        }
        print "\n";
    };
    print " };\n";


    #
    # emit a mapping array from state numbers to state names.
    #
    #    This array is used for producing debugging output from the rule parser.
    #
    print "#ifdef RBBI_DEBUG\n";
    print "static const char * const RBBIRuleStateNames[] = {";
    for ($state=0; $state<$num_states; $state++) {
        if ($stateNames[$state] ne "") {
            print "     \"$stateNames[$state]\",\n";
        } else {
            print "    0,\n";
        }
    }
    print "    0};\n";
    print "#endif\n\n";

    print "U_NAMESPACE_END\n";
    print "#endif\n";
}