The Tor Browser: intl/icu/source/common/rbbicst.pl@6474c204b198 (annotated)

intl/icu/source/common/rbbicst.pl@6474c204b198 (annotated)

intl/icu/source/common/rbbicst.pl

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rwxr-xr-x

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 #**************************************************************************
 #   Copyright (C) 2002-2005 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 "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";
 }

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intl/icu/source/common/rbbicst.pl@6474c204b198 (annotated)

intl/icu/source/common/rbbicst.pl