/*
    This software may only be used by you under license from AT&T Corp.
    ("AT&T").  A copy of AT&T's Source Code Agreement is available at
    AT&T's Internet website having the URL:
    <http://www.research.att.com/sw/tools/graphviz/license/source.html>
    If you received this software without first entering into a license
    with AT&T, you have an infringing copy of this software and cannot use
    it without violating AT&T's intellectual property rights.
*/
#pragma prototyped

/* File - TrieFA.ins.c
 *
 *    This file contains code to be included in the scanner file using a
 * generated trie-based FA.
 */

#include "triefa.h"

#ifdef UNDERLINE
static long CharMask[28] = {
	0x0000001,	0x0000000,	0x0000004,	0x0000008,	
	0x0000010,	0x0000020,	0x0000040,	0x0000080,
	0x0000100,	0x0000200,	0x0000400,	0x0000800,
	0x0001000,	0x0002000,	0x0004000,	0x0008000,
	0x0010000,	0x0020000,	0x0040000,	0x0080000,
	0x0100000,	0x0200000,	0x0400000,	0x0800000,
	0x1000000,	0x2000000,  0x4000000,  0x8000000,
};

#define IN_MASK_RANGE(C)	(islower(C) || ((C) == '_'))
#define MASK_INDEX(C)	((C) - '_')

#else
static long CharMask[26] = {
	0x0000001,	0x0000002,	0x0000004,	0x0000008,	
	0x0000010,	0x0000020,	0x0000040,	0x0000080,
	0x0000100,	0x0000200,	0x0000400,	0x0000800,
	0x0001000,	0x0002000,	0x0004000,	0x0008000,
	0x0010000,	0x0020000,	0x0040000,	0x0080000,
	0x0100000,	0x0200000,	0x0400000,	0x0800000,
	0x1000000,	0x2000000						
};

#define IN_MASK_RANGE(C)	islower(C)
#define MASK_INDEX(C)		((C) - 'a')

#endif

static int		TFA_State;

/* TFA_Init:
 *
 *    Initialize the trie FA.
 */
#define TFA_Init() TFA_State = 0

/* TFA_Advance:
 *
 *    Advance to the next state (or -1) on the lowercase letter c.  This should be an
 * inline routine, but the C++ implementation isn't advanced enough so we use a macro.
 */
#define TFA_Advance(C)	{															\
	char		c = C;																\
	if (TFA_State >= 0) {															\
		if (isupper(c))																\
			c = tolower(c);															\
		else if (! IN_MASK_RANGE(c)) {												\
			TFA_State = -1;															\
			goto TFA_done;															\
		}																			\
		if (TrieStateTbl[TFA_State].mask & CharMask[MASK_INDEX(c)]) {				\
			int		i = TrieStateTbl[TFA_State].trans_base;						\
			while (TrieTransTbl[i].c != c)											\
				i++;																\
			TFA_State = TrieTransTbl[i].next_state;									\
		}																			\
		else																		\
			TFA_State = -1;															\
	}																				\
  TFA_done:;																		\
} /* end of TFA_Advance. */

/* TFA_Definition:
 *
 *    Return the definition (if any) associated with the current state.
 */
#define TFA_Definition() \
	((TFA_State < 0) ? -1 : TrieStateTbl[TFA_State].def)