V10/cmd/flex/flexdef.h
/* flexdef - definitions file for flex */
/*
* Copyright (c) 1989 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 the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not 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 2.0 89/06/20 15:49:50 vern Locked $ (LBL) */
#ifndef FILE
#include <stdio.h>
#endif
#ifdef SYS_V
#include <string.h>
#ifdef AMIGA
#define bzero(s, n) setmem((char *)(s), (unsigned)(n), '\0')
#define abs(x) ((x) < 0 ? -(x) : (x))
#else
#define bzero(s, n) memset((char *)(s), '\0', (unsigned)(n))
#endif
#ifndef VMS
char *memset();
#else
/* memset is needed for old versions of the VMS C runtime library */
#define memset(s, c, n) \
{ \
register char *t = s; \
register unsigned int m = n; \
while ( m-- > 0 ) \
*t++ = c; \
}
#define unlink delete
#define SHORT_FILE_NAMES
#endif
#endif
#ifndef SYS_V
#include <strings.h>
#ifdef lint
char *sprintf(); /* keep lint happy */
#endif
#endif
/* maximum line length we'll have to deal with */
#define MAXLINE BUFSIZ
/* maximum size of file name */
#define FILENAMESIZE 1024
#define min(x,y) ((x) < (y) ? (x) : (y))
#define max(x,y) ((x) > (y) ? (x) : (y))
#ifdef MS_DOS
#define abs(x) ((x) < 0 ? -(x) : (x))
#define SHORT_FILE_NAMES
#endif
#define true 1
#define false 0
#ifndef DEFAULT_SKELETON_FILE
#define DEFAULT_SKELETON_FILE "flex.skel"
#endif
/* 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
/* array names to be used in generated machine. They're short because
* we write out one data statement (which names the array) for each element
* in the array.
*/
/* points to list of rules accepted for a state */
#define ALIST "yy_accept"
#define ACCEPT "yy_acclist" /* list of rules accepted for a state */
#define ECARRAY "yy_ec" /* maps input characters to equivalence classes */
/* maps equivalence classes to meta-equivalence classes */
#define MATCHARRAY "yy_meta"
#define BASEARRAY "yy_base" /* "base" array */
#define DEFARRAY "yy_def" /* "default" array */
#define NEXTARRAY "yy_nxt" /* "next" array */
#define CHECKARRAY "yy_chk" /* "check" array */
/* 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 */
/* size of input alphabet - should be size of ASCII set */
#define CSIZE 127
#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 0 /* 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 quick comparisons
*/
#define PROT_SAVE_SIZE 2000
#define MSP 50 /* maximum number of saved protos (protos on the proto queue) */
/* maximum number of out-transitions a state can have that we'll rummage
* around through the interior of the internal fast table looking for a
* spot for it
*/
#define MAX_XTIONS_FULL_INTERIOR_FIT 4
/* maximum number of rules which will be reported as being associated
* with a DFA state
*/
#define MAX_ASSOC_RULES 100
/* number that, if used to subscript an array, has a good chance of producing
* an error; should be small enough to fit into a short
*/
#define BAD_SUBSCRIPT -32767
/* absolute value of largest number that can be stored in a short, with a
* bit of slop thrown in for general paranoia.
*/
#define MAX_SHORT 32766
/* Declarations for global variables. */
/* variables for symbol tables:
* sctbl - start-condition symbol table
* ndtbl - name-definition symbol table
* ccltab - character class text symbol table
*/
struct hash_entry
{
struct hash_entry *prev, *next;
char *name;
char *str_val;
int int_val;
} ;
typedef struct hash_entry *hash_table[];
#define NAME_TABLE_HASH_SIZE 101
#define START_COND_HASH_SIZE 101
#define CCL_HASH_SIZE 101
extern struct hash_entry *ndtbl[NAME_TABLE_HASH_SIZE];
extern struct hash_entry *sctbl[START_COND_HASH_SIZE];
extern struct hash_entry *ccltab[CCL_HASH_SIZE];
/* variables for flags:
* printstats - if true (-v), dump statistics
* syntaxerror - true if a syntax error has been found
* eofseen - true if we've seen an eof in the input file
* ddebug - if true (-d), make a "debug" scanner
* trace - if true (-T), trace processing
* spprdflt - if true (-s), suppress the default rule
* interactive - if true (-I), generate an interactive scanner
* caseins - if true (-i), generate a case-insensitive scanner
* useecs - if true (-ce flag), use equivalence classes
* fulltbl - if true (-cf flag), don't compress the DFA state table
* usemecs - if true (-cm flag), use meta-equivalence classes
* fullspd - if true (-F flag), use Jacobson method of table representation
* gen_line_dirs - if true (i.e., no -L flag), generate #line directives
* performance_report - if true (i.e., -p flag), generate a report relating
* to scanner performance
* backtrack_report - if true (i.e., -b flag), generate "lex.backtrack" file
* listing backtracking states
* yymore_used - if true, yymore() is used in input rules
* reject - if true, generate backtracking tables for REJECT macro
* real_reject - if true, scanner really uses REJECT (as opposed to just
* having "reject" set for variable trailing context)
* continued_action - true if this rule's action is to "fall through" to
* the next rule's action (i.e., the '|' action)
* yymore_really_used - has a REALLY_xxx value indicating whether a
* %used or %notused was used with yymore()
* reject_really_used - same for REJECT
*/
extern int printstats, syntaxerror, eofseen, ddebug, trace, spprdflt;
extern int interactive, caseins, useecs, fulltbl, usemecs;
extern int fullspd, gen_line_dirs, performance_report, backtrack_report;
extern int yymore_used, reject, real_reject, continued_action;
#define REALLY_NOT_DETERMINED 0
#define REALLY_USED 1
#define REALLY_NOT_USED 2
extern int yymore_really_used, reject_really_used;
/* variables used in the flex input routines:
* datapos - characters on current output line
* dataline - number of contiguous lines of data in current data
* statement. Used to generate readable -f output
* skelfile - the skeleton file
* yyin - input file
* temp_action_file - temporary file to hold actions
* backtrack_file - file to summarize backtracking states to
* action_file_name - name of the temporary file
* infilename - name of input file
* linenum - current input line number
*/
extern int datapos, dataline, linenum;
extern FILE *skelfile, *yyin, *temp_action_file, *backtrack_file;
extern char *infilename;
extern char action_file_name[];
/* variables for stack of states having only one out-transition:
* onestate - state number
* onesym - transition symbol
* onenext - target state
* onedef - default base entry
* onesp - stack pointer
*/
extern int onestate[ONE_STACK_SIZE], onesym[ONE_STACK_SIZE];
extern int onenext[ONE_STACK_SIZE], onedef[ONE_STACK_SIZE], onesp;
/* variables for nfa machine data:
* current_mns - current maximum on number of NFA states
* num_rules - number of the last accepting state; also is number of
* rules created so far
* current_max_rules - current maximum number of rules
* lastnfa - last nfa state number created
* firstst - physically the first state of a fragment
* lastst - last physical state of fragment
* finalst - last logical state of fragment
* transchar - transition character
* trans1 - transition state
* trans2 - 2nd transition state for epsilons
* accptnum - accepting number
* assoc_rule - rule associated with this NFA state (or 0 if none)
* state_type - a STATE_xxx type identifying whether the state is part
* of a normal rule, the leading state in a trailing context
* rule (i.e., the state which marks the transition from
* recognizing the text-to-be-matched to the beginning of
* the trailing context), or a subsequent state in a trailing
* context rule
* rule_type - a RULE_xxx type identifying whether this a a ho-hum
* normal rule or one which has variable head & trailing
* context
* rule_linenum - line number associated with rule
*/
extern int current_mns, num_rules, current_max_rules, lastnfa;
extern int *firstst, *lastst, *finalst, *transchar, *trans1, *trans2;
extern int *accptnum, *assoc_rule, *state_type, *rule_type, *rule_linenum;
/* different types of states; values are useful as masks, as well, for
* routines like check_trailing_context()
*/
#define STATE_NORMAL 0x1
#define STATE_TRAILING_CONTEXT 0x2
/* global holding current type of state we're making */
extern int current_state_type;
/* different types of rules */
#define RULE_NORMAL 0
#define RULE_VARIABLE 1
/* true if the input rules include a rule with both variable-length head
* and trailing context, false otherwise
*/
extern int variable_trailing_context_rules;
/* variables for protos:
* numtemps - number of templates created
* numprots - number of protos created
* protprev - backlink to a more-recently used proto
* protnext - forward link to a less-recently used proto
* prottbl - base/def table entry for proto
* protcomst - common state of proto
* firstprot - number of the most recently used proto
* lastprot - number of the least recently used proto
* protsave contains the entire state array for protos
*/
extern int numtemps, numprots, protprev[MSP], protnext[MSP], prottbl[MSP];
extern int protcomst[MSP], firstprot, lastprot, protsave[PROT_SAVE_SIZE];
/* variables for managing equivalence classes:
* numecs - number of equivalence classes
* nextecm - forward link of Equivalence Class members
* ecgroup - class number or backward link of EC members
* nummecs - number of meta-equivalence classes (used to compress
* templates)
* tecfwd - forward link of meta-equivalence classes members
* tecbck - backward link of MEC's
*/
extern int numecs, nextecm[CSIZE + 1], ecgroup[CSIZE + 1], nummecs;
extern int tecfwd[CSIZE + 1], tecbck[CSIZE + 1];
/* variables for start conditions:
* lastsc - last start condition created
* current_max_scs - current limit on number of start conditions
* scset - set of rules active in start condition
* scbol - set of rules active only at the beginning of line in a s.c.
* scxclu - true if start condition is exclusive
* sceof - true if start condition has EOF rule
* scname - start condition name
* actvsc - stack of active start conditions for the current rule
*/
extern int lastsc, current_max_scs, *scset, *scbol, *scxclu, *sceof, *actvsc;
extern char **scname;
/* variables for dfa machine data:
* current_max_dfa_size - current maximum number of NFA states in DFA
* current_max_xpairs - current maximum number of non-template xtion pairs
* current_max_template_xpairs - current maximum number of template pairs
* current_max_dfas - current maximum number DFA states
* lastdfa - last dfa state number created
* nxt - state to enter upon reading character
* chk - check value to see if "nxt" applies
* tnxt - internal nxt table for templates
* base - offset into "nxt" for given state
* def - where to go if "chk" disallows "nxt" entry
* tblend - last "nxt/chk" table entry being used
* firstfree - first empty entry in "nxt/chk" table
* dss - nfa state set for each dfa
* dfasiz - size of nfa state set for each dfa
* dfaacc - accepting set for each dfa state (or accepting number, if
* -r is not given)
* accsiz - size of accepting set for each dfa state
* dhash - dfa state hash value
* numas - number of DFA accepting states created; note that this
* is not necessarily the same value as num_rules, which is the analogous
* value for the NFA
* numsnpairs - number of state/nextstate transition pairs
* jambase - position in base/def where the default jam table starts
* jamstate - state number corresponding to "jam" state
* end_of_buffer_state - end-of-buffer dfa state number
*/
extern int current_max_dfa_size, current_max_xpairs;
extern int current_max_template_xpairs, current_max_dfas;
extern int lastdfa, lasttemp, *nxt, *chk, *tnxt;
extern int *base, *def, tblend, firstfree, **dss, *dfasiz;
extern union dfaacc_union
{
int *dfaacc_set;
int dfaacc_state;
} *dfaacc;
extern int *accsiz, *dhash, numas;
extern int numsnpairs, jambase, jamstate;
extern int end_of_buffer_state;
/* variables for ccl information:
* lastccl - ccl index of the last created ccl
* current_maxccls - current limit on the maximum number of unique ccl's
* cclmap - maps a ccl index to its set pointer
* ccllen - gives the length of a ccl
* cclng - true for a given ccl if the ccl is negated
* cclreuse - counts how many times a ccl is re-used
* current_max_ccl_tbl_size - current limit on number of characters needed
* to represent the unique ccl's
* ccltbl - holds the characters in each ccl - indexed by cclmap
*/
extern int lastccl, current_maxccls, *cclmap, *ccllen, *cclng, cclreuse;
extern int current_max_ccl_tbl_size;
extern char *ccltbl;
/* variables for miscellaneous information:
* starttime - real-time when we started
* endtime - real-time when we ended
* nmstr - last NAME scanned by the scanner
* sectnum - section number currently being parsed
* nummt - number of empty nxt/chk table entries
* hshcol - number of hash collisions detected by snstods
* dfaeql - number of times a newly created dfa was equal to an old one
* numeps - number of epsilon NFA states created
* eps2 - number of epsilon states which have 2 out-transitions
* num_reallocs - number of times it was necessary to realloc() a group
* of arrays
* tmpuses - number of DFA states that chain to templates
* totnst - total number of NFA states used to make DFA states
* peakpairs - peak number of transition pairs we had to store internally
* numuniq - number of unique transitions
* numdup - number of duplicate transitions
* hshsave - number of hash collisions saved by checking number of states
* num_backtracking - number of DFA states requiring back-tracking
* bol_needed - whether scanner needs beginning-of-line recognition
*/
extern char *starttime, *endtime, nmstr[MAXLINE];
extern int sectnum, nummt, hshcol, dfaeql, numeps, eps2, num_reallocs;
extern int tmpuses, totnst, peakpairs, numuniq, numdup, hshsave;
extern int num_backtracking, bol_needed;
char *allocate_array(), *reallocate_array();
#define allocate_integer_array(size) \
(int *) allocate_array( size, sizeof( int ) )
#define reallocate_integer_array(array,size) \
(int *) reallocate_array( (char *) array, size, sizeof( int ) )
#define allocate_int_ptr_array(size) \
(int **) allocate_array( size, sizeof( int * ) )
#define allocate_char_ptr_array(size) \
(char **) allocate_array( size, sizeof( char * ) )
#define allocate_dfaacc_union(size) \
(union dfaacc_union *) \
allocate_array( size, sizeof( union dfaacc_union ) )
#define reallocate_int_ptr_array(array,size) \
(int **) reallocate_array( (char *) array, size, sizeof( int * ) )
#define reallocate_char_ptr_array(array,size) \
(char **) reallocate_array( (char *) array, size, sizeof( char * ) )
#define reallocate_dfaacc_union(array, size) \
(union dfaacc_union *) reallocate_array( (char *) array, size, sizeof( union dfaacc_union ) )
#define allocate_character_array(size) allocate_array( size, sizeof( char ) )
#define reallocate_character_array(array,size) \
reallocate_array( array, size, sizeof( char ) )
/* used to communicate between scanner and parser. The type should really
* be YYSTYPE, but we can't easily get our hands on it.
*/
extern int yylval;