speed up ydecoding a little

trunk/ripnews/news/article.rb

@@ -719,9 +719,9 @@ def _ydecode_file(file, outfile)
 	total = 0
 	oldpartend = 0
 
-	ymap=[]
-	(0..255).each do |b|
-		ymap.push((b-42+256)%256)
+	ymap = {}
+	(-106..255).each do |b|
+		ymap[b]=((b-42)%256)
 	end
 
 	while (! file.eof)
@@ -828,28 +828,11 @@ def _ydecode_file(file, outfile)
 				i += 1
 				line[i] -= 64
 			end
-			ostr << ((line[i] - 42) % 256)
-#			outfile.putc((line[i] - 42) % 256)
-#			ostr << ymap[line[i]%255]
+			ostr << ymap[line[i]]
 			i += 1
 		end
 		outfile << ostr
 		bytes += ostr.length
-
-#		special = 0
-#		line.each_byte { |b|
-#			if special == 0
-#				if b == 0x3d
-#					special = 1
-#					next
-#				end
-#			else
-#				special = 0
-#				b = (b - 64) % 256
-#			end
-#			outfile.putc((b - 42) % 256)
-#			bytes += 1
-#		}
 	end
 
 	print "No \"=yend\" found!!!\n"
@@ -866,6 +849,11 @@ def _ydecode_array(data)
 	percent = 0
 	mark = lines/100
 
+	ymap = {}
+	(-106..255).each do |b|
+		ymap[b]=((b-42)%256)
+	end
+
 	i = 0
 	while (i < data.length)
 		if  data[i] =~ /^\=ybegin\s+(.*line\=.*)/
@@ -918,21 +906,35 @@ def _ydecode_array(data)
 #			print "#{i}: linesize mismatch, was #{line.length}, should be #{linesize}...\n"
 #		end
 
-		special = 0
-		str = ""
-		line.each_byte { |b|
-			if special == 0
-				if b == 0x3d
-					special = 1
-					next
+		i = 0
+		ll = line.length
+		ostr = ''
+		while i < ll
+			if line[i] == 0x3d
+				i += 1
+				line[i] -= 64
 			end
-			else
-				special = 0
-				b = (b - 64) % 256
+			ostr << ymap[line[i]]
+			i += 1
 		end
-			str << ((b - 42) % 256).chr
-		}
-		decode << str
+		decode << ostr
+		bytes += ostr.length
+
+#		special = 0
+#		str = ""
+#		line.each_byte { |b|
+#			if special == 0
+#				if b == 0x3d
+#					special = 1
+#					next
+#				end
+#			else
+#				special = 0
+#				b = (b - 64) % 256
+#			end
+#			str << ((b - 42) % 256).chr
+#		}
+#		decode << str
 	end
 
 	print "${i}: no \"=yend\" found!!!\n"