#!/bin/rc

if(~ $#uconv 0)
	uconv=8.uconv
unicodedata = UnicodeData.txt
for(i)
	unicodedata = $i

fn Sprint {
	$uconv
}

fn Unicode {
	grep $rune < $unicodedata | tr -d '\015'
}

hex='
function hex0(s,        base, r, n, i, k, c)
{
	base = 16;
	if(s ~ /^0[xX]/)
		s = substr(str, 3);
	if(s !~ /^[0-9a-fA-f]*/)
		return 0;
	n = length(s)
  	r = 0
	for (i = 1; i <= n; i++) {
		c = tolower(substr(s, i, 1))
		k = index("0123456789abcdef", c) - 1;
		r = r * base + k
	}
     	return r
}
'
awk '-F;' '
' ^ $hex ^ '

function hex(x){
	return strtonum("0x" x);
}

BEGIN {
}

$3 ~ /^L.$/ {
	cp = hex($1);
	if(cp > last)
		last = cp
#	if(length($14)>=4)
#		lc[cp] = $14
	if(length($6) >= 4 && $6 !~ /<.*/)
		val[cp] = $6
}

END {
	for(i = 0; i < last; i++){
		cp = i
		while(length(r = val[cp]) > 0){
			cp = hex(r)
			if(cp == 0)
				print "broke at [" $0 "] r= " r
		}
#		if(length(r = lc[cp]) > 0)
#			cp = hex(r)
		if(cp != i){
			str = sprintf("\\u%04x", i)
			tab[cp] = tab[cp] str
			cmt[cp] = cmt[cp] sprintf("\\u%04x", i);
		}
	}

	print "static";
	print "Rune\t*__unfoldbase[] =";
	print "{";

	for(i = 0; i < last; i++)
		if(length(tab[i]) > 0){
			str = sprintf("\\u%04x", i)
			print "/* " str " */\tL\"" str tab[i] "\","
		#	print "\t\""  str tab[i] "\",	/* " str " */"
		}

	print "};";
	print "";

} ' <{Unicode} | Sprint