#!/bin/sh

set -e
cd "${0%/*}/../.."
exec >lib/unicode/prop/uprop_get_gc.c

gawk '
BEGIN {
	FS = ";"

	print "/* This file is autogenerated by gen/prop/gc; DO NOT EDIT. */"
	print ""
	print "#include \"_bsearch.h\""
	print "#include \"macros.h\""
	print "#include \"rune.h\""
	print "#include \"unicode/prop.h\""
	print ""
}

{
	s = "GC_" toupper($3)
	lo = strtonum("0X" $1)

	if ($2 ~ /First/) {
		getline
		hi = strtonum("0X" $1)
	} else
		hi = lo

	for (i = lo; i <= hi; i++)
		props[i] = s
}

END {
	print "static constexpr enum uprop_gc lookup_lat1[] = {"
	for (i = 0; i < 0x100; i++) {
		if (i % 8 == 0)
			printf "\t"
		printf "%5s,%s", props[i], i % 8 == 7 ? "\n" : " "
	}
	print "};"
	print ""
	print "static const struct {"
	print "\trune lo, hi;"
	print "\tenum uprop_gc val;"
	print "} lookup[] = {"

	for (i = 0x100; i <= 0x10FFFF; i++) {
		if (!props[i])
			continue
		lo = i
		while (props[lo] == props[i + 1])
			i++
		printf "\t{RUNE_C(0x%06X), RUNE_C(0x%06X), %s},\n", lo, i, props[lo]
	}

	print "};"
	print ""
	print "_MLIB_DEFINE_BSEARCH(enum uprop_gc, lookup, GC_CN)"
	print ""
	print "enum uprop_gc"
	print "uprop_get_gc(rune ch)"
	print "{"
	print "\treturn ch < lengthof(lookup_lat1) ? lookup_lat1[ch] : mlib_lookup(ch);"
	print "}"
}
' data/UnicodeData