#!/bin/sh

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

gawk '
BEGIN {
	FS = "[ ;]+"

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

/^[A-F0-9]/ {
	n = split($1, a, /\.\./)
	lo = strtonum("0X" a[1])
	hi = strtonum("0X" a[n])

	for (i = lo; i <= hi; i++)
		props[i] = "JG_" toupper($2)
}

END {
	print "static const struct {"
	print "\trune lo, hi;"
	print "\tenum uprop_jg val;"
	print "} lookup[] = {"

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

	print "};"
	print ""
	print "_MLIB_DEFINE_BSEARCH(enum uprop_jg, lookup, JG_NO_JOINING_GROUP)"
	print ""
	print "enum uprop_jg"
	print "uprop_get_jg(rune ch)"
	print "{"
	print "\treturn ch < lookup[0].lo ? JG_NO_JOINING_GROUP : mlib_lookup(ch);"
	print "}"
}
' data/DerivedJoiningGroup | sed 's/\s*$//'