/* $Id: unicode_template.c,v 1.1.1.1 2003/06/04 00:26:16 marka Exp $ */

/*
 * Copyright (c) 2000,2001 Japan Network Information Center.
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 * Chiyoda-ku, Tokyo 101-0047, Japan.
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 * 1. Use, Modification and Redistribution (including distribution of any
 *    modified or derived work) in source and/or binary forms is permitted
 *    under this License Terms and Conditions.
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 *    materials provided with the distribution.  For the purposes of binary
 *    distribution the "Copyright Notice" refers to the following language:
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#ifndef UNICODE_TEMPLATE_INIT
#define UNICODE_TEMPLATE_INIT

/*
 * Macro for multi-level index table.
 */
#define LOOKUPTBL(vprefix, mprefix, v) \
	DMAP(vprefix)[\
		IMAP(vprefix)[\
			IMAP(vprefix)[IDX0(mprefix, v)] + IDX1(mprefix, v)\
		]\
	].tbl[IDX2(mprefix, v)]

#define IDX0(mprefix, v) IDX_0(v, BITS1(mprefix), BITS2(mprefix))
#define IDX1(mprefix, v) IDX_1(v, BITS1(mprefix), BITS2(mprefix))
#define IDX2(mprefix, v) IDX_2(v, BITS1(mprefix), BITS2(mprefix))

#define IDX_0(v, bits1, bits2)	((v) >> ((bits1) + (bits2)))
#define IDX_1(v, bits1, bits2)	(((v) >> (bits2)) & ((1 << (bits1)) - 1))
#define IDX_2(v, bits1, bits2)	((v) & ((1 << (bits2)) - 1))

#define BITS1(mprefix)	mprefix ## _BITS_1
#define BITS2(mprefix)	mprefix ## _BITS_2

#define IMAP(vprefix)	concat4(VERSION, _, vprefix, _imap)
#define DMAP(vprefix)	concat4(VERSION, _, vprefix, _table)
#define SEQ(vprefix)	concat4(VERSION, _, vprefix, _seq)
#define concat4(a,b,c,d)	concat4X(a, b, c, d)
#define concat4X(a,b,c,d)	a ## b ## c ## d

#endif /* UNICODE_TEMPLATE_INIT */

static int
compose_sym(canonclass_, VERSION) (unsigned long c) {
	/* Look up canonicalclass table. */
	return (LOOKUPTBL(canon_class, CANON_CLASS, c));
}

static int
compose_sym(decompose_, VERSION) (unsigned long c, const unsigned long **seqp)
{
	/* Look up decomposition table. */
	int seqidx = LOOKUPTBL(decompose, DECOMP, c);
	*seqp = SEQ(decompose) + (seqidx & ~DECOMP_COMPAT);
	return (seqidx);
}

static int
compose_sym(compose_, VERSION) (unsigned long c,
				const struct composition **compp)
{
	/* Look up composition table. */
	int seqidx = LOOKUPTBL(compose, CANON_COMPOSE, c);
	*compp = SEQ(compose) + (seqidx & 0xffff);
	return (seqidx >> 16);
}
