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flexdef.h
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1994-01-04
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/* flexdef - definitions file for flex */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Vern Paxson.
*
* The United States Government has rights in this work pursuant
* to contract no. DE-AC03-76SF00098 between the United States
* Department of Energy and the University of California.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* Neither the name of the University nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* @(#) $Header: flexdef.h,v 1.2 94/01/04 14:33:14 vern Exp $ (LBL) */
#include <stdio.h>
#include <ctype.h>
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#if __STDC__
#include <stdlib.h>
#endif
/* Always be prepared to generate an 8-bit scanner. */
#define CSIZE 256
#define Char unsigned char
/* Size of input alphabet - should be size of ASCII set. */
#ifndef DEFAULT_CSIZE
#define DEFAULT_CSIZE 128
#endif
#ifndef PROTO
#ifdef __STDC__
#define PROTO(proto) proto
#else
#define PROTO(proto) ()
#endif
#endif
#ifdef VMS
#define unlink delete
#define SHORT_FILE_NAMES
#endif
#ifdef MS_DOS
#define SHORT_FILE_NAMES
#endif
/* Maximum line length we'll have to deal with. */
#define MAXLINE 2048
#ifndef MIN
#define MIN(x,y) ((x) < (y) ? (x) : (y))
#endif
#ifndef MAX
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#endif
#ifndef ABS
#define ABS(x) ((x) < 0 ? -(x) : (x))
#endif
/* ANSI C does not guarantee that isascii() is defined */
#ifndef isascii
#define isascii(c) ((c) <= 0177)
#endif
#define true 1
#define false 0
/* Special chk[] values marking the slots taking by end-of-buffer and action
* numbers.
*/
#define EOB_POSITION -1
#define ACTION_POSITION -2
/* Number of data items per line for -f output. */
#define NUMDATAITEMS 10
/* Number of lines of data in -f output before inserting a blank line for
* readability.
*/
#define NUMDATALINES 10
/* Transition_struct_out() definitions. */
#define TRANS_STRUCT_PRINT_LENGTH 15
/* Returns true if an nfa state has an epsilon out-transition slot
* that can be used. This definition is currently not used.
*/
#define FREE_EPSILON(state) \
(transchar[state] == SYM_EPSILON && \
trans2[state] == NO_TRANSITION && \
finalst[state] != state)
/* Returns true if an nfa state has an epsilon out-transition character
* and both slots are free
*/
#define SUPER_FREE_EPSILON(state) \
(transchar[state] == SYM_EPSILON && \
trans1[state] == NO_TRANSITION) \
/* Maximum number of NFA states that can comprise a DFA state. It's real
* big because if there's a lot of rules, the initial state will have a
* huge epsilon closure.
*/
#define INITIAL_MAX_DFA_SIZE 750
#define MAX_DFA_SIZE_INCREMENT 750
/* A note on the following masks. They are used to mark accepting numbers
* as being special. As such, they implicitly limit the number of accepting
* numbers (i.e., rules) because if there are too many rules the rule numbers
* will overload the mask bits. Fortunately, this limit is \large/ (0x2000 ==
* 8192) so unlikely to actually cause any problems. A check is made in
* new_rule() to ensure that this limit is not reached.
*/
/* Mask to mark a trailing context accepting number. */
#define YY_TRAILING_MASK 0x2000
/* Mask to mark the accepting number of the "head" of a trailing context
* rule.
*/
#define YY_TRAILING_HEAD_MASK 0x4000
/* Maximum number of rules, as outlined in the above note. */
#define MAX_RULE (YY_TRAILING_MASK - 1)
/* NIL must be 0. If not, its special meaning when making equivalence classes
* (it marks the representative of a given e.c.) will be unidentifiable.
*/
#define NIL 0
#define JAM -1 /* to mark a missing DFA transition */
#define NO_TRANSITION NIL
#define UNIQUE -1 /* marks a symbol as an e.c. representative */
#define INFINITY -1 /* for x{5,} constructions */
#define INITIAL_MAX_CCLS 100 /* max number of unique character classes */
#define MAX_CCLS_INCREMENT 100
/* Size of table holding members of character classes. */
#define INITIAL_MAX_CCL_TBL_SIZE 500
#define MAX_CCL_TBL_SIZE_INCREMENT 250
#define INITIAL_MAX_RULES 100 /* default maximum number of rules */
#define MAX_RULES_INCREMENT 100
#define INITIAL_MNS 2000 /* default maximum number of nfa states */
#define MNS_INCREMENT 1000 /* amount to bump above by if it's not enough */
#define INITIAL_MAX_DFAS 1000 /* default maximum number of dfa states */
#define MAX_DFAS_INCREMENT 1000
#define JAMSTATE -32766 /* marks a reference to the state that always jams */
/* Enough so that if it's subtracted from an NFA state number, the result
* is guaranteed to be negative.
*/
#define MARKER_DIFFERENCE 32000
#define MAXIMUM_MNS 31999
/* Maximum number of nxt/chk pairs for non-templates. */
#define INITIAL_MAX_XPAIRS 2000
#define MAX_XPAIRS_INCREMENT 2000
/* Maximum number of nxt/chk pairs needed for templates. */
#define INITIAL_MAX_TEMPLATE_XPAIRS 2500
#define MAX_TEMPLATE_XPAIRS_INCREMENT 2500
#define SYM_EPSILON (CSIZE + 1) /* to mark transitions on the symbol epsilon */
#define INITIAL_MAX_SCS 40 /* maximum number of start conditions */
#define MAX_SCS_INCREMENT 40 /* amount to bump by if it's not enough */
#define ONE_STACK_SIZE 500 /* stack of states with only one out-transition */
#define SAME_TRANS -1 /* transition is the same as "default" entry for state */
/* The following percentages are used to tune table compression:
* The percentage the number of out-transitions a state must be of the
* number of equivalence classes in order to be considered for table
* compaction by using protos.
*/
#define PROTO_SIZE_PERCENTAGE 15
/* The percentage the number of homogeneous out-transitions of a state
* must be of the number of total out-transitions of the state in order
* that the state's transition table is first compared with a potential
* template of the most common out-transition instead of with the first
* proto in the proto queue.
*/
#define CHECK_COM_PERCENTAGE 50
/* The percentage the number of differences between a state's transition
* table and the proto it was first compared with must be of the total
* number of out-transitions of the state in order to keep the first
* proto as a good match and not search any further.
*/
#define FIRST_MATCH_DIFF_PERCENTAGE 10
/* The percentage the number of differences between a state's transition
* table and the most similar proto must be of the state's total number
* of out-transitions to use the proto as an acceptable close match.
*/
#define ACCEPTABLE_DIFF_PERCENTAGE 50
/* The percentage the number of homogeneous out-transitions of a state
* must be of the number of total out-transitions of the state in order
* to consider making a template from the state.
*/
#define TEMPLATE_SAME_PERCENTAGE 60
/* The percentage the number of differences between a state's transition
* table and the most similar proto must be of the state's total number
* of out-transitions to create a new proto from the state.
*/
#define NEW_PROTO_DIFF_PERCENTAGE 20
/* The percentage the total number of out-transitions of a state must be
* of the number of equivalence classes in order to consider trying to
* fit the transition table into "holes" inside the nxt/chk table.
*/
#define INTERIOR_FIT_PERCENTAGE 15
/* Size of region set aside to cache the complete transition table of
* protos on the proto queue to enable quic