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def generate_yyname_remaps(file)
remaps = {}
File.readlines(file).each do |line|
if /%token\s+\S+\s*(?<name>\S+)[^{]*{{(?<replacement>.*)}}/ =~ line
replacement = if replacement.length == 1
%Q{\"'#{replacement}'\"}
else
%Q{\"#{replacement}\"}
end
name = %Q{"#{name}"}
# $stderr.puts "NAME #{name}(#{name.length}) = #{replacement.inspect}"
remaps[name] = replacement
end
end
remaps
end
def get_numbers_until_end_block
table = []
while line = gets
break if /\};/ =~ line
next if /^\/\// =~ line
line.split(/,/).each do |number|
n = number.strip
table.push(n.to_i) unless n == ""
end
end
table
end
def print_yynames_until_end_block(remaps)
while line = gets
if /\};/ =~ line
print line
break
end
next if /^\/\// =~ line
new_line = line.split(/,/).map do |element|
# $stderr.puts "ELEMENT #{element.strip} #{element.strip.size}"
key = element.strip.gsub("\\\\", '\\')
# In .y we use '\\' which jay does realize is backslash in generated code
# but in yyNames it wraps the string in extra "" and then expands the number
# of \\ to make each \ its own backslash. Part of me does not quite grok
# how it encodes the name like this yet the specification works on matching
# an incoming token. Working around this by making it the key we need.
key = "\"\'\\\\'\"" if key == "\"'\\\\'\""
remaps[key] || element
end.join(',')
puts new_line
end
end
# We use this script to generate our normal parser and the parser for
# the ripper extension.
package = ARGV[0] =~ /ripper/i ? 'org.jruby.ext.ripper' : 'org.jruby.parser'
while gets
break if /protected static final short\[\] yyTable = \{/ =~ $_
print $_
end
yytable_prefix = ARGV.length == 1 ? '' : ARGV.shift
original_grammar_file = ARGV.shift
remaps = generate_yyname_remaps original_grammar_file
table4 = get_numbers_until_end_block
puts " protected static final short[] yyTable = #{yytable_prefix}YyTables.yyTable();"
while gets
break if /protected static final short\[\] yyCheck = \{/ =~ $_
print $_
end
check4 = get_numbers_until_end_block
puts " protected static final short[] yyCheck = #{yytable_prefix}YyTables.yyCheck();"
while gets
print $_
break if /protected static final String\[\] yyNames = \{/ =~ $_
end
print_yynames_until_end_block remaps
while gets
print $_
end
table2 = table4.slice!(0, table4.size / 2)
table3 = table4.slice!(0, table4.size / 2)
table1 = table2.slice!(0, table2.size / 2)
check2 = check4.slice!(0, check4.size / 2)
check3 = check4.slice!(0, check4.size / 2)
check1 = check2.slice!(0, check2.size / 2)
def printShortArray(table, f)
table.each_with_index { |e, i|
f.print "\n " if (i % 10 == 0)
begin
f.printf "%4d, ", e
rescue ArgumentError => a
$stderr.puts "Trouble printing '#{e}' on index #{i}"
end
}
end
def printShortMethod(f, table, name)
f.puts " private static final short[] yy#{name}() {"
f.puts " return new short[] {"
printShortArray table, f
f.puts
f.puts " };"
f.puts " }"
f.puts
end
open("#{yytable_prefix}YyTables.java", "w") { |f|
f.print <<END
/*
***** BEGIN LICENSE BLOCK *****
* Version: EPL 2.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/epl-v20.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2013-2017 The JRuby Team (jruby@jruby.org)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package #{package};
public class #{yytable_prefix}YyTables {
private static short[] combine(short[] t1, short[] t2,
short[] t3, short[] t4) {
short[] t = new short[t1.length + t2.length + t3.length + t4.length];
int index = 0;
System.arraycopy(t1, 0, t, index, t1.length);
index += t1.length;
System.arraycopy(t2, 0, t, index, t2.length);
index += t2.length;
System.arraycopy(t3, 0, t, index, t3.length);
index += t3.length;
System.arraycopy(t4, 0, t, index, t4.length);
return t;
}
public static final short[] yyTable() {
return combine(yyTable1(), yyTable2(), yyTable3(), yyTable4());
}
public static final short[] yyCheck() {
return combine(yyCheck1(), yyCheck2(), yyCheck3(), yyCheck4());
}
END
printShortMethod(f, table1, "Table1")
printShortMethod(f, table2, "Table2")
printShortMethod(f, table3, "Table3")
printShortMethod(f, table4, "Table4")
printShortMethod(f, check1, "Check1")
printShortMethod(f, check2, "Check2")
printShortMethod(f, check3, "Check3")
printShortMethod(f, check4, "Check4")
f.puts "}"
}
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