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require 'optparse'
require 'erb'
C_ESC = {
"\\" => "\\\\",
'"' => '\"',
"\n" => '\n',
}
0x00.upto(0x1f) {|ch| C_ESC[[ch].pack("C")] ||= "\\%03o" % ch }
0x7f.upto(0xff) {|ch| C_ESC[[ch].pack("C")] = "\\%03o" % ch }
C_ESC_PAT = Regexp.union(*C_ESC.keys)
def c_esc(str)
'"' + str.gsub(C_ESC_PAT) { C_ESC[$&] } + '"'
end
class StrSet
def self.parse(pattern)
if /\A\s*(([0-9a-f][0-9a-f]|\{([0-9a-f][0-9a-f]|[0-9a-f][0-9a-f]-[0-9a-f][0-9a-f])(,([0-9a-f][0-9a-f]|[0-9a-f][0-9a-f]-[0-9a-f][0-9a-f]))*\})+(\s+|\z))*\z/i !~ pattern
raise ArgumentError, "invalid pattern: #{pattern.inspect}"
end
result = []
pattern.scan(/\S+/) {|seq|
seq_result = []
while !seq.empty?
if /\A([0-9a-f][0-9a-f])/i =~ seq
byte = $1.to_i(16)
seq_result << [byte..byte]
seq = $'
elsif /\A\{([^\}]+)\}/ =~ seq
set = $1
seq = $'
set_result = []
set.scan(/[^,]+/) {|range|
if /\A([0-9a-f][0-9a-f])-([0-9a-f][0-9a-f])\z/ =~ range
b = $1.to_i(16)
e = $2.to_i(16)
set_result << (b..e)
elsif /\A([0-9a-f][0-9a-f])\z/ =~ range
byte = $1.to_i(16)
set_result << (byte..byte)
else
raise "invalid range: #{range.inspect}"
end
}
seq_result << set_result
else
raise "invalid sequence: #{seq.inspect}"
end
end
result << seq_result
}
self.new(result)
end
def initialize(pat)
@pat = pat
end
def hash
@pat.hash
end
def eql?(other)
self.class == other.class &&
@pat == other.instance_eval { @pat }
end
alias == eql?
def to_s
if @pat.empty?
"(empset)"
else
@pat.map {|seq|
if seq.empty?
"(empstr)"
else
seq.map {|byteset|
if byteset.length == 1 && byteset[0].begin == byteset[0].end
"%02x" % byteset[0].begin
else
"{" +
byteset.map {|range|
if range.begin == range.end
"%02x" % range.begin
else
"%02x-%02x" % [range.begin, range.end]
end
}.join(',') +
"}"
end
}.join('')
end
}.join(' ')
end
end
def inspect
"\#<#{self.class}: #{self.to_s}>"
end
def emptyable?
@pat.any? {|seq|
seq.empty?
}
end
def first_bytes
result = {}
@pat.each {|seq|
next if seq.empty?
seq.first.each {|range|
range.each {|byte|
result[byte] = true
}
}
}
result.keys.sort
end
def each_firstbyte
h = {}
@pat.each {|seq|
next if seq.empty?
seq.first.each {|range|
range.each {|byte|
(h[byte] ||= []) << seq[1..-1]
}
}
}
h.keys.sort.each {|byte|
yield byte, StrSet.new(h[byte])
}
end
end
class ActionMap
def self.parse(hash)
h = {}
hash.each {|pat, action|
h[StrSet.parse(pat)] = action
}
self.new(h)
end
def initialize(h)
@map = h
end
def hash
hash = 0
@map.each {|k,v|
hash ^= k.hash ^ v.hash
}
hash
end
def eql?(other)
self.class == other.class &&
@map == other.instance_eval { @map }
end
alias == eql?
def inspect
"\#<#{self.class}:" +
@map.map {|k, v| " [" + k.to_s + "]=>" + v.inspect }.join('') +
">"
end
def empty_action
@map.each {|ss, action|
return action if ss.emptyable?
}
nil
end
def each_firstbyte(valid_encoding=nil)
h = {}
@map.each {|ss, action|
if ss.emptyable?
raise "emptyable pattern"
else
ss.each_firstbyte {|byte, rest|
h[byte] ||= {}
if h[byte][rest]
raise "ambiguous"
end
h[byte][rest] = action
}
end
}
if valid_encoding
valid_encoding.each_firstbyte {|byte, rest|
if h[byte]
am = ActionMap.new(h[byte])
yield byte, am, rest
else
am = ActionMap.new(rest => :undef)
yield byte, am, nil
end
}
else
h.keys.sort.each {|byte|
am = ActionMap.new(h[byte])
yield byte, am, nil
}
end
end
OffsetsMemo = {}
InfosMemo = {}
def format_offsets(offsets)
code = "{\n"
0.step(offsets.length-1,16) {|i|
code << " "
code << offsets[i,8].map {|off| "%3d," % off.to_s }.join('')
code << " "
code << offsets[i+8,8].map {|off| "%3d," % off.to_s }.join('')
code << "\n"
}
code << '}'
code
end
def generate_info(info)
case info
when :nomap
"NOMAP"
when :undef
"UNDEF"
when :invalid
"INVALID"
when :func_so
"FUNso"
when /\A([0-9a-f][0-9a-f])\z/i
"o1(0x#$1)"
when /\A([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])\z/i
"o2(0x#$1,0x#$2)"
when /\A([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])\z/i
"o3(0x#$1,0x#$2,0x#$3)"
when /\A([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])([0-9a-f][0-9a-f])\z/i
"o4(0x#$1,0x#$2,0x#$3,0x#$4)"
else
info.to_s
end
end
def format_infos(infos)
infos = infos.map {|info| generate_info(info) }
maxlen = infos.map {|info| info.length }.max
columns = maxlen <= 16 ? 4 : 2
code = "{\n"
0.step(infos.length-1, columns) {|i|
code << " "
is = infos[i,columns]
is.each {|info|
code << sprintf(" %#{maxlen}s,", info)
}
code << "\n"
}
code << "}"
code
end
def generate_lookup_node(name, table)
offsets = []
infos = []
infomap = {}
table.each_with_index {|action, byte|
action ||= :invalid
unless o = infomap[action]
infomap[action] = o = infos.length
infos[o] = action
end
offsets[byte] = o
}
if n = OffsetsMemo[offsets]
offsets_name = n
offsets_code = ''
else
offsets_name = "#{name}_offsets"
offsets_code = <<"End"
static const unsigned char
#{offsets_name}[#{offsets.length}] = #{format_offsets(offsets)};
End
OffsetsMemo[offsets] = offsets_name
end
if n = InfosMemo[infos]
infos_name = n
infos_code = ''
else
infos_name = "#{name}_infos"
infos_code = <<"End"
static const struct byte_lookup* const
#{infos_name}[#{infos.length}] = #{format_infos(infos)};
End
InfosMemo[infos] = infos_name
end
r = offsets_code + infos_code + <<"End"
static const BYTE_LOOKUP
#{name} = {
#{offsets_name},
#{infos_name}
};
End
r
end
PreMemo = {}
PostMemo = {}
NextName = "a"
def generate_node(code, name_hint=nil, ranges=[], valid_encoding=nil)
ranges = [0x00..0xff] if ranges.empty?
range = ranges.first
if n = PreMemo[[self,valid_encoding]]
return n
end
table = Array.new(range.end - range.begin + 1)
each_firstbyte(valid_encoding) {|byte, rest, rest_valid_encoding|
unless range === byte
raise "byte not in range"
end
if a = rest.empty_action
table[byte-range.begin] = a
else
name_hint2 = nil
name_hint2 = "#{name_hint}_#{'%02X' % byte}" if name_hint
table[byte-range.begin] = "&" + rest.generate_node(code, name_hint2, ranges[1..-1], rest_valid_encoding)
end
}
if n = PostMemo[table]
return n
end
if !name_hint
name_hint = "fun_" + NextName.dup
NextName.succ!
end
PreMemo[[self,valid_encoding]] = PostMemo[table] = name_hint
code << generate_lookup_node(name_hint, table)
name_hint
end
end
def encode_utf8(map)
r = []
map.each {|k, v|
# integer means UTF-8 encoded sequence.
k = [k].pack("U").unpack("H*")[0].upcase if Integer === k
v = [v].pack("U").unpack("H*")[0].upcase if Integer === v
r << [k,v]
}
r
end
def transcode_compile_tree(name, from, map)
map = encode_utf8(map)
h = {}
map.each {|k, v|
h[k] = v
}
am = ActionMap.parse(h)
if ValidEncoding[from]
valid_encoding = StrSet.parse(ValidEncoding[from])
else
valid_encoding = nil
end
ranges = from == "UTF-8" ? [0x00..0xff, 0x80..0xbf, 0x80..0xbf, 0x80..0xbf] : []
code = ''
defined_name = am.generate_node(code, name, ranges, valid_encoding)
return defined_name, code
end
TRANSCODERS = []
def transcode_tblgen(from, to, map)
STDERR.puts "converter for #{from} to #{to}" if VERBOSE_MODE
id_from = from.tr('^0-9A-Za-z', '_')
id_to = to.tr('^0-9A-Za-z', '_')
if from == "UTF-8"
tree_name = "to_#{id_to}"
elsif to == "UTF-8"
tree_name = "from_#{id_from}"
else
tree_name = "from_#{id_from}_to_#{id_to}"
end
map = encode_utf8(map)
real_tree_name, tree_code = transcode_compile_tree(tree_name, from, map)
transcoder_name = "rb_#{tree_name}"
TRANSCODERS << transcoder_name
from_utf8 = from == 'UTF-8' ? 1 : 0
max_output = map.map {|k,v| String === v ? v.length/2 : 1 }.max
transcoder_code = <<"End"
static const rb_transcoder
#{transcoder_name} = {
#{c_esc from}, #{c_esc to}, &#{real_tree_name}, #{max_output}, #{from_utf8},
NULL, NULL,
};
End
tree_code + "\n" + transcoder_code
end
def transcode_generate_node(am, name_hint=nil, ranges=[])
STDERR.puts "converter for #{name_hint}" if VERBOSE_MODE
code = ''
am.generate_node(code, name_hint, ranges)
code
end
def transcode_register_code
code = ''
TRANSCODERS.each {|transcoder_name|
code << " rb_register_transcoder(&#{transcoder_name});\n"
}
code
end
ValidEncoding = {
'1byte' => '{00-ff}',
'2byte' => '{00-ff}{00-ff}',
'4byte' => '{00-ff}{00-ff}{00-ff}{00-ff}',
'US-ASCII' => '{00-7f}',
'UTF-8' => '{00-7f}
{c2-df}{80-bf}
e0{a0-bf}{80-bf}
{e1-ec}{80-bf}{80-bf}
ed{80-9f}{80-bf}
{ee-ef}{80-bf}{80-bf}
f0{90-bf}{80-bf}{80-bf}
{f1-f3}{80-bf}{80-bf}{80-bf}
f4{80-8f}{80-bf}{80-bf}',
'UTF-16BE' => '{00-d7,e0-ff}{00-ff}
{d8-db}{00-ff}{dc-df}{00-ff}',
'UTF-16LE' => '{00-ff}{00-d7,e0-ff}
{00-ff}{d8-db}{00-ff}{dc-df}',
'UTF-32BE' => '0000{00-d7,e0-ff}{00-ff}
00{01-10}{00-ff}{00-ff}',
'UTF-32LE' => '{00-ff}{00-d7,e0-ff}0000
{00-ff}{00-ff}{01-10}00',
'EUC-JP' => '{00-7f}
{a1-fe}{a1-fe}
8e{a1-fe}
8f{a1-fe}{a1-fe}',
'CP51932' => '{00-7f}
{a1-fe}{a1-fe}
8e{a1-fe}',
'Shift_JIS' => '{00-7f}
{81-9f,e0-fc}{40-7e,80-fc}
{a1-df}',
'EUC-KR' => '{00-7f}
{a1-fe}{a1-fe}',
'CP949' => '{00-7f}
{81-fe}{41-5a,61-7a,81-fe}',
'Big5' => '{00-7f}
{81-fe}{40-7e,a1-fe}',
'EUC-TW' => '{00-7f}
{a1-fe}{a1-fe}
8e{a1-b0}{a1-fe}{a1-fe}',
'GBK' => '{00-80}
{81-fe}{40-7e,80-fe}',
'GB18030' => '{00-7f}
{81-fe}{40-7e,80-fe}
{81-fe}{30-39}{81-fe}{30-39}',
}
{
'ISO-8859-1' => '1byte',
'ISO-8859-2' => '1byte',
'ISO-8859-3' => '1byte',
'ISO-8859-4' => '1byte',
'ISO-8859-5' => '1byte',
'ISO-8859-6' => '1byte',
'ISO-8859-7' => '1byte',
'ISO-8859-8' => '1byte',
'ISO-8859-9' => '1byte',
'ISO-8859-10' => '1byte',
'ISO-8859-11' => '1byte',
'ISO-8859-13' => '1byte',
'ISO-8859-14' => '1byte',
'ISO-8859-15' => '1byte',
'Windows-31J' => 'Shift_JIS',
}.each {|k, v|
ValidEncoding[k] = ValidEncoding.fetch(v)
}
def make_signature(filename, src)
"src=#{filename.dump}, len=#{src.length}, checksum=#{src.sum}"
end
output_filename = nil
verbose_mode = false
force_mode = false
op = OptionParser.new
op.def_option("--help", "show help message") { puts op; exit 0 }
op.def_option("--verbose", "verbose mode") { verbose_mode = true }
op.def_option("--force", "force table generation") { force_mode = true }
op.def_option("--output=FILE", "specify output file") {|arg| output_filename = arg }
op.parse!
VERBOSE_MODE = verbose_mode
arg = ARGV.shift
dir = File.dirname(arg)
$:.unshift dir unless $:.include? dir
src = File.read(arg)
src.force_encoding("ascii-8bit") if src.respond_to? :force_encoding
base_signature = "/* autogenerated. */\n"
base_signature << "/* #{make_signature(File.basename(arg), src)} */\n"
if !force_mode && output_filename && File.readable?(output_filename)
old_signature = File.open(output_filename) {|f| f.gets("").chomp }
chk_signature = base_signature.dup
old_signature.each_line {|line|
if %r{/\* src="([0-9a-z_.-]+)",} =~ line
name = $1
next if name == File.basename(arg)
path = File.join(dir, name)
if File.readable? path
chk_signature << "/* #{make_signature(name, File.read(path))} */\n"
end
end
}
if old_signature == chk_signature && File.mtime(__FILE__) < File.mtime(output_filename)
now = Time.now
File.utime(now, now, output_filename)
STDERR.puts "already up-to-date: #{output_filename}" if VERBOSE_MODE
exit
end
end
if VERBOSE_MODE
if output_filename
STDERR.puts "generating #{output_filename} ..."
end
end
libs1 = $".dup
erb_result = ERB.new(src, nil, '%').result(binding)
libs2 = $".dup
libs = libs2 - libs1
lib_sigs = ''
libs.each {|lib|
lib = File.basename(lib)
path = File.join(dir, lib)
if File.readable? path
lib_sigs << "/* #{make_signature(lib, File.read(path))} */\n"
end
}
result = ''
result << base_signature
result << lib_sigs
result << "\n"
result << erb_result
result << "\n"
if output_filename
new_filename = output_filename + ".new"
File.open(new_filename, "w") {|f| f << result }
File.rename(new_filename, output_filename)
STDERR.puts "done." if VERBOSE_MODE
else
print result
end
|