2 * Copyright (C) 1994, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.3 1996-01-08 09:09:19 adam
8 * Function dfa_parse got 'const' string argument.
9 * New functions to define char mappings made public.
11 * Revision 1.2 1995/01/25 11:30:50 adam
12 * Simple error reporting when parsing regular expressions.
13 * Memory usage reduced.
15 * Revision 1.1 1995/01/24 16:02:53 adam
16 * New private header file in dfa module (dfap.h).
17 * Module no longer uses yacc to parse regular expressions.
27 struct Tnode *root; /* root of regular syntax tree */
28 int position; /* no of positions so far */
29 int rule; /* no of rules so far */
30 BSetHandle *charset; /* character set type */
31 BSet anyset; /* character recognized by `.' */
32 int use_Tnode; /* used Tnodes */
33 int max_Tnode; /* allocated Tnodes */
34 struct Tblock *start; /* start block of Tnodes */
35 struct Tblock *end; /* end block of Tnodes */
40 typedef struct DFA_stateb_ {
41 struct DFA_stateb_ *next;
42 struct DFA_state *state_block;
46 struct DFA_state *freelist; /* chain of unused (but allocated) states */
47 struct DFA_state *unmarked; /* chain of unmarked DFA states */
48 struct DFA_state *marked; /* chain of marked DFA states */
49 DFA_stateb *statemem; /* state memory */
50 int no; /* no of states (unmarked+marked) */
51 SetType st; /* Position set type */
52 int hash; /* no hash entries in hasharray */
53 struct DFA_state **hasharray; /* hash pointers */
54 struct DFA_state **sortarray; /* sorted DFA states */
55 struct DFA_trans *transmem; /* transition memory */
58 int init_DFA_states (struct DFA_states **dfasp, SetType st, int hash);
59 int rm_DFA_states (struct DFA_states **dfasp);
60 int add_DFA_state (struct DFA_states *dfas, Set *s,
61 struct DFA_state **sp);
62 struct DFA_state *get_DFA_state (struct DFA_states *dfas);
63 void sort_DFA_states (struct DFA_states *dfas);
64 void add_DFA_tran (struct DFA_states *, struct DFA_state *,