#!/usr/bin/ruby
# bitty's itty bitty highlighter :D
# c/c++ - colors comments, strs, brace blocks
# my first ruby program so do not laugh :'(


def usage
	puts "usage #{$0} <input.c> [output.html]"
	exit(0)
end

### state tracking variables
bracedepth	= 0 		### nested {
incomment	= 0			### in multi-line comment
instring	= 0			### in "..." string
bslash		= 0			### prev char is / 

### syntax colors
colcc		= "blue"		### compiler instructions
colcom		= "green"		### comments
colstr		= "maroon"		### strings
colbr		= ["antiquewhite","aquamarine","thistle"]
### the three brace colors cycle

### common html strings
### yeah <font> is deprecated but it makes my life easier
comment		= "<font color='#{colcom}'>"
string		= "<font color='#{colstr}'>" 
preprocess	= "<font color='#{colcc}'>"
brace		= "<span style=\"color:#{colbr[bracedepth]};\">"
closespan	= "</span>"
closefont	= "</font>"
html        = ""
mifile		= ARGV.shift || usage()

html << %q^

<html>
<head>
	<title>#{mifile} - BitRot</title>
	<style> <!--- //
		body {
			background-color:lightgray;
			font-face:monaco,courier;
			font-size:10px; 
		}
	//-->
	</style>
</head>
<body>
<pre>
^

### main loop
### TMP TEST that just looks for lines starting with # and colors them
### except it does not work :'(
File.readlines(mifile).each do |line|
	prefix = ''
	suffix = ''
	if line =~ /^#/
		if(incomment + instring == 0)
			prefix = preprocess
			suffix = closefont
		end
	end
	
	html << prefix
	html << line.gsub('<', '&lt;').gsub('>', '&gt;').chomp 
	html << suffix + "\n"
end

html << %q^
</body>
</html>	
^

$stdout.puts html