#!/bin/sh

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

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

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

/^[^#]/ {
	props[strtonum("0X" $1)] = strtonum("0X" $2)
}

END {
	print "static constexpr rune lookup_lat1[] = {"
	for (i = 0; i < 0x100; i++) {
		if (i % 8 == 0)
			printf "\t"
		printf "0x%02X,%s", (props[i] ? props[i] : 0), \
			i % 8 == 7 ? "\n" : " "
	}
	print "};"
	print ""
	print "static const struct {"
	print "\trune k, v;"
	print "} lookup[] = {"

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

	print "};"
	print ""
	print "_MLIB_DEFINE_BSEARCH_KV(rune, lookup, 0)"
	print ""
	print "rune"
	print "uprop_get_bmg(rune ch)"
	print "{"
	print "\treturn ch < lengthof(lookup_lat1) ? lookup_lat1[ch] : mlib_lookup_kv(ch);"
	print "}"
}
' data/BidiMirroring