#!/bin/sh

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

gawk '
BEGIN {
	FS = "( *#.*| +; +)"

	map["Canonical"] = "CAN"
	map["Compat"]    = "COM"
	map["Circle"]    = "ENC"
	map["Final"]     = "FIN"
	map["Font"]      = "FONT"
	map["Fraction"]  = "FRA"
	map["Initial"]   = "INIT"
	map["Isolated"]  = "ISO"
	map["Medial"]    = "MED"
	map["Narrow"]    = "NAR"
	map["Nobreak"]   = "NB"
	map["Small"]     = "SML"
	map["Square"]    = "SQR"
	map["Sub"]       = "SUB"
	map["Super"]     = "SUP"
	map["Vertical"]  = "VERT"
	map["Wide"]      = "WIDE"


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

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

	for (i = lo; i <= hi; i++) {
		gsub(/^; /, "", $2)
		props[i] = "DT_" map[$2]
	}
}

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

	print "};"
	print ""
	print "__MLIB_DEFINE_BSEARCH(enum uprop_dt, lookup, DT_NONE)"
	print ""
	print "enum uprop_dt"
	print "uprop_get_dt(rune ch)"
	print "{"
	print "\treturn ch < lengthof(lookup_lat1) ? lookup_lat1[ch] : mlib_lookup(ch);"
	print "}"
}
' data/DerivedDecompositionType.txt