2 * Copyright (C) 1994, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.4 1995-01-25 11:31:04 adam
8 * Simple error reporting when parsing regular expressions.
10 * Revision 1.3 1995/01/24 16:01:30 adam
11 * Added -ansi to CFLAGS.
12 * New functions and change of data structures.
14 * Revision 1.2 1994/09/26 16:31:23 adam
15 * Minor changes. xmalloc declares xcalloc now.
17 * Revision 1.1 1994/09/26 10:17:43 adam
18 * Dfa-module header files.
29 unsigned char ch[2]; /* transition on ch[0] <= c <= ch[1] to */
30 unsigned short to; /* this state */
34 struct DFA_trans *next; /* next DFA transition block */
35 struct DFA_tran *tran_block; /* pointer to transitions */
36 int ptr; /* index of next transition in tran_block */
37 int size; /* allocated size of tran_block */
41 struct DFA_state *next; /* next entry in free/unmarked/marked list */
42 struct DFA_state *link; /* link to next entry in hash chain */
43 struct DFA_tran *trans; /* transition list */
44 Set set; /* set of positions (important nfa states) */
45 short no; /* no of this state */
46 short tran_no; /* no of transitions to other states */
47 short rule_no; /* if non-zero, this holds accept rule no */
52 struct DFA_state **states;
53 struct DFA_states *state_info;
54 struct DFA_parse *parse_info;
57 struct DFA *dfa_init (void);
58 int dfa_parse (struct DFA *, char **);
59 void dfa_mkstate (struct DFA *);
60 void dfa_delete (struct DFA **);
62 extern int debug_dfa_trav;
63 extern int debug_dfa_tran;
64 extern int debug_dfa_followpos;
65 extern int dfa_verbose;
71 #define DFA_ERR_SYNTAX 1