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

### state tracking variables
bracedepth	= 0	 		### nested {
incomment	= 0			### in multi-line comment
instring	= 0			### in "..." string

### 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=\"bg-color:#{colbr[bracedepth]};\">"
closespan	= "</span>"
closefont	= "</font>"
html        	= ""

### this is the tricky part
### priority: preprocessor statements (handled in main loop),
### comments, strings, braces
### problem : unexpected kEND, remove them and get error : expecting kEND
def scanline
	i = 0
	while i < line.length
		### could mess up if line[0] is a star and line[-1] is /
		if line[i]=="*" and line[i-1]=="/" and incomment+instring== 0 
			line = line[0,i-2] + comment + line[i-1,-1]
			incomment = 1
			i++
		end
		if line[i] == "*" and line[i+1] == "/" and incomment == 1
			line = line[0,i+1] + closefont + line[i+2,-1]
			incomment = 0
			i++
		end
		i++
	end
end	


mifile		= ARGV.shift

# thanks to mr. hdm for some way cool code hacks
html << %q^

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

### main loop
### TMP TEST that just looks for lines starting with # and colors them
File.readlines(mifile).each do |line|
	line = line.gsub('<', '&lt;').gsub('>', '&gt;').chomp	
	if line =~ /^#/
		if(incomment + instring == 0)
			line = preprocess + line + "\n" + closefont
		end
	### calls to scanline go here
	end
	
	html << line
end

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

#outp = ARGV.shift
#fd   = outp ? File.open(outp, "w") : $stdout
print html
end