2 * Copyright (C) 1994-1996, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.22 1996-06-04 10:20:10 adam
8 * Added support for character mapping.
10 * Revision 1.21 1996/05/24 14:46:07 adam
11 * Added dict_grep_cmap function to define user-mapping in grep lookups.
13 * Revision 1.20 1996/03/20 09:35:23 adam
14 * Function dict_lookup_grep got extra parameter, init_pos, which marks
15 * from which position in pattern approximate pattern matching should occur.
17 * Revision 1.19 1996/02/02 13:43:54 adam
18 * The public functions simply use char instead of Dict_char to represent
19 * search strings. Dict_char is used internally only.
21 * Revision 1.18 1996/02/01 20:41:06 adam
22 * Bug fix: insert didn't work on 8-bit characters due to unsigned char
23 * compares in dict_strcmp (strcmp) and signed Dict_char. Dict_char is
26 * Revision 1.17 1995/12/07 11:47:04 adam
27 * Default pagesize is 4k instead of 8k.
29 * Revision 1.16 1995/12/06 14:41:13 adam
30 * New function: dict_delete.
32 * Revision 1.15 1995/10/27 13:59:17 adam
33 * Function dict_look_grep got extra parameter max_pos that upon return
34 * hold length of longest prefix that matches pattern.
36 * Revision 1.14 1995/10/09 16:18:35 adam
37 * Function dict_lookup_grep got extra client data parameter.
39 * Revision 1.13 1995/10/06 09:03:51 adam
40 * First version of scan.
42 * Revision 1.12 1995/09/14 11:53:02 adam
43 * Grep handle function parameter info is const now.
45 * Revision 1.11 1995/09/04 09:09:51 adam
46 * String arg in dict lookup is const.
49 * Revision 1.10 1994/10/05 12:16:58 adam
50 * Pagesize is a resource now.
52 * Revision 1.9 1994/10/04 12:08:19 adam
55 * Revision 1.8 1994/10/03 17:23:11 adam
56 * First version of dictionary lookup with regular expressions and errors.
58 * Revision 1.7 1994/09/22 10:44:47 adam
59 * Don't remember what changed!!
61 * Revision 1.6 1994/09/16 15:39:21 adam
62 * Initial code of lookup - not tested yet.
64 * Revision 1.5 1994/09/06 13:05:29 adam
65 * Further development of insertion. Some special cases are
66 * not properly handled yet! assert(0) are put here. The
67 * binary search in each page definitely reduce usr CPU.
69 * Revision 1.4 1994/09/01 17:44:40 adam
70 * Work on insertion in dictionary. Not finished yet.
72 * Revision 1.3 1994/08/18 12:41:12 adam
73 * Some development of dictionary. Not finished at all!
75 * Revision 1.2 1994/08/17 13:32:33 adam
76 * Use cache in dict - not in bfile.
78 * Revision 1.1 1994/08/16 16:26:53 adam
88 typedef unsigned Dict_ptr;
89 typedef unsigned char Dict_char;
94 Dict_ptr free_list, last;
97 struct Dict_file_block
99 struct Dict_file_block *h_next, **h_prev;
100 struct Dict_file_block *lru_next, *lru_prev;
106 typedef struct Dict_file_struct
111 struct Dict_file_block *all_blocks;
112 struct Dict_file_block *free_list;
113 struct Dict_file_block **hash_array;
115 struct Dict_file_block *lru_back, *lru_front;
124 typedef struct Dict_struct {
127 char **(*grep_cmap)(const char **from, int len);
128 struct Dict_head head;
131 #define DICT_MAGIC "dict00"
133 #define DICT_DEFAULT_PAGESIZE "4096"
135 int dict_bf_readp (Dict_BFile bf, int no, void **bufp);
136 int dict_bf_newp (Dict_BFile bf, int no, void **bufp);
137 int dict_bf_touch (Dict_BFile bf, int no);
138 void dict_bf_flush_blocks (Dict_BFile bf, int no_to_flush);
139 Dict_BFile dict_bf_open (const char *name, int block_size, int cache, int rw);
140 int dict_bf_close (Dict_BFile dbf);
142 Dict dict_open (const char *name, int cache, int rw);
143 int dict_close (Dict dict);
144 int dict_insert (Dict dict, const char *p, int userlen, void *userinfo);
145 int dict_delete (Dict dict, const char *p);
146 char *dict_lookup (Dict dict, const char *p);
147 int dict_lookup_ec (Dict dict, char *p, int range,
148 int (*f)(char *name));
149 int dict_lookup_grep (Dict dict, const char *p, int range, void *client,
150 int *max_pos, int init_pos,
151 int (*f)(char *name, const char *info,
153 int dict_strcmp (const Dict_char *s1, const Dict_char *s2);
154 int dict_strlen (const Dict_char *s);
155 int dict_scan (Dict dict, char *str,
156 int *before, int *after, void *client,
157 int (*f)(char *name, const char *info, int pos,
160 void dict_grep_cmap (Dict dict,
161 char **(*cmap)(const char **from, int len));
165 #define DICT_type(x) 0[(Dict_ptr*) x]
166 #define DICT_backptr(x) 1[(Dict_ptr*) x]
167 #define DICT_nextptr(x) 2[(Dict_ptr*) x]
168 #define DICT_nodir(x) 0[(short*)((char*)(x)+3*sizeof(Dict_ptr))]
169 #define DICT_size(x) 1[(short*)((char*)(x)+3*sizeof(Dict_ptr))]
170 #define DICT_infoffset (3*sizeof(Dict_ptr)+2*sizeof(short))
171 #define DICT_pagesize(x) ((x)->head.page_size)
173 #define DICT_to_str(x) sizeof(Dict_info)+sizeof(Dict_ptr)
177 backptr pointer to parent
178 nextptr pointer to next page (if any)
180 size size of strings,info,ptr entries