# File lib/gettext/runtime/mofile.rb, line 57 def initialize(output_charset = nil) @filename = nil @last_modified = nil @little_endian = true @output_charset = output_charset @plural_proc = nil super() end
# File lib/gettext/runtime/mofile.rb, line 52 def self.open(arg = nil, output_charset = nil) result = self.new(output_charset) result.load(arg) end
From gettext-0.12.1/gettext-runtime/intl/hash-string.h Defines the so called `hashpjw' function by P.J. Weinberger [see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools, 1986, 1987 Bell Telephone Laboratories, Inc.]
# File lib/gettext/runtime/mofile.rb, line 186 def hash_string(str) hval = 0 i = 0 str.each_byte do |b| break if b == '\0' hval <<= 4 hval += b.to_i g = hval & (0xf << (HASHWORDBITS - 4)) if (g != 0) hval ^= g >> (HASHWORDBITS - 8) hval ^= g end end hval end
# File lib/gettext/runtime/mofile.rb, line 77 def load(arg) if arg.kind_of? String begin st = File.stat(arg) @last_modified = [st.ctime, st.mtime] rescue Exception end load_from_file(arg) else load_from_stream(arg) end @filename = arg self end
# File lib/gettext/runtime/mofile.rb, line 269 def load_from_file(filename) @filename = filename begin File.open(filename, 'rb'){|f| load_from_stream(f)} rescue => e e.set_backtrace("File: #{@filename}") raise e end end
# File lib/gettext/runtime/mofile.rb, line 92 def load_from_stream(io) magic = io.read(4) case magic when MAGIC_BIG_ENDIAN @little_endian = false when MAGIC_LITTLE_ENDIAN @little_endian = true else raise InvalidFormat.new(sprintf("Unknown signature %s", magic.dump)) end endian_type6 = @little_endian ? 'V6' : 'N6' endian_type_astr = @little_endian ? 'V*' : 'N*' header = HeaderRev1.new(magic, *(io.read(4 * 6).unpack(endian_type6))) if header.revision == 1 # FIXME: It doesn't support sysdep correctly. header.n_sysdep_segments = io.read(4).unpack(endian_type6) header.sysdep_segments_offset = io.read(4).unpack(endian_type6) header.n_sysdep_strings = io.read(4).unpack(endian_type6) header.orig_sysdep_tab_offset = io.read(4).unpack(endian_type6) header.trans_sysdep_tab_offset = io.read(4).unpack(endian_type6) elsif header.revision > 1 raise InvalidFormat.new(sprintf("file format revision %d isn't supported", header.revision)) end io.pos = header.orig_table_offset orig_table_data = io.read((4 * 2) * header.nstrings).unpack(endian_type_astr) io.pos = header.translated_table_offset trans_table_data = io.read((4 * 2) * header.nstrings).unpack(endian_type_astr) original_strings = Array.new(header.nstrings) for i in 0...header.nstrings io.pos = orig_table_data[i * 2 + 1] original_strings[i] = io.read(orig_table_data[i * 2 + 0]) end clear for i in 0...header.nstrings io.pos = trans_table_data[i * 2 + 1] str = io.read(trans_table_data[i * 2 + 0]) if (! original_strings[i]) || original_strings[i] == "" if str @charset = nil @nplurals = nil @plural = nil str.each_line{|line| if %r^Content-Type:/ =~ line and %rcharset=((?:\w|-)+)/ =~ line @charset = $1 elsif %r^Plural-Forms:\s*nplurals\s*\=\s*(\d*);\s*plural\s*\=\s*([^;]*)\n?/ =~ line @nplurals = $1 @plural = $2 end break if @charset and @nplurals } @nplurals = "1" unless @nplurals @plural = "0" unless @plural end else if @charset and @output_charset str = convert_encoding(str, original_strings[i]) end end self[original_strings[i]] = str.freeze end self end
# File lib/gettext/runtime/mofile.rb, line 168 def next_prime(seed) Prime.instance.find{|x| x > seed } end
# File lib/gettext/runtime/mofile.rb, line 287 def plural_as_proc unless @plural_proc @plural_proc = Proc.new{|n| eval(@plural)} begin @plural_proc.call(1) rescue @plural_proc = Proc.new{|n| 0} end end @plural_proc end
# File lib/gettext/runtime/mofile.rb, line 162 def prime?(number) ('1' * number) !~ %r^1?$|^(11+?)\11++$/ end
# File lib/gettext/runtime/mofile.rb, line 279 def save_to_file(filename) File.open(filename, 'wb'){|f| save_to_stream(f)} end
Save data as little endian format.
# File lib/gettext/runtime/mofile.rb, line 203 def save_to_stream(io) header_size = 4 * 7 table_size = 4 * 2 * size hash_table_size = next_prime((size * 4) / 3) hash_table_size = 3 if hash_table_size <= 2 header = Header.new( MAGIC_LITTLE_ENDIAN, # magic 0, # revision size, # nstrings header_size, # orig_table_offset header_size + table_size, # translated_table_offset hash_table_size, # hash_table_size header_size + table_size * 2 # hash_table_offset ) io.write(header.to_a.pack('a4V*')) ary = to_a ary.sort!{|a, b| a[0] <=> b[0]} # sort by original string pos = header.hash_table_size * 4 + header.hash_table_offset orig_table_data = Array.new() ary.each{|item, _| orig_table_data.push(item.bytesize) orig_table_data.push(pos) pos += item.bytesize + 1 # +1 is <NUL> } io.write(orig_table_data.pack('V*')) trans_table_data = Array.new() ary.each{|_, item| trans_table_data.push(item.bytesize) trans_table_data.push(pos) pos += item.bytesize + 1 # +1 is <NUL> } io.write(trans_table_data.pack('V*')) hash_tab = Array.new(hash_table_size) j = 0 ary[0...size].each {|key, _| hash_val = hash_string(key) idx = hash_val % hash_table_size if hash_tab[idx] != nil incr = 1 + (hash_val % (hash_table_size - 2)) begin if (idx >= hash_table_size - incr) idx -= hash_table_size - incr else idx += incr end end until (hash_tab[idx] == nil) end hash_tab[idx] = j + 1 j += 1 } hash_tab.collect!{|i| i ? i : 0} io.write(hash_tab.pack('V*')) ary.each{|item, _| io.write(item); io.write("\00"") } ary.each{|_, item| io.write(item); io.write("\00"") } self end
# File lib/gettext/runtime/mofile.rb, line 283 def set_comment(msgid_or_sym, comment) #Do nothing end
# File lib/gettext/runtime/mofile.rb, line 66 def update! if FileTest.exist?(@filename) st = File.stat(@filename) load(@filename) unless (@last_modified == [st.ctime, st.mtime]) else warn "#{@filename} was lost." if $DEBUG clear end self end