2 * Copyright (C) 1994, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.19 1996-02-02 13:43:54 adam
8 * The public functions simply use char instead of Dict_char to represent
9 * search strings. Dict_char is used internally only.
11 * Revision 1.18 1996/02/01 20:41:06 adam
12 * Bug fix: insert didn't work on 8-bit characters due to unsigned char
13 * compares in dict_strcmp (strcmp) and signed Dict_char. Dict_char is
16 * Revision 1.17 1995/12/07 11:47:04 adam
17 * Default pagesize is 4k instead of 8k.
19 * Revision 1.16 1995/12/06 14:41:13 adam
20 * New function: dict_delete.
22 * Revision 1.15 1995/10/27 13:59:17 adam
23 * Function dict_look_grep got extra parameter max_pos that upon return
24 * hold length of longest prefix that matches pattern.
26 * Revision 1.14 1995/10/09 16:18:35 adam
27 * Function dict_lookup_grep got extra client data parameter.
29 * Revision 1.13 1995/10/06 09:03:51 adam
30 * First version of scan.
32 * Revision 1.12 1995/09/14 11:53:02 adam
33 * Grep handle function parameter info is const now.
35 * Revision 1.11 1995/09/04 09:09:51 adam
36 * String arg in dict lookup is const.
39 * Revision 1.10 1994/10/05 12:16:58 adam
40 * Pagesize is a resource now.
42 * Revision 1.9 1994/10/04 12:08:19 adam
45 * Revision 1.8 1994/10/03 17:23:11 adam
46 * First version of dictionary lookup with regular expressions and errors.
48 * Revision 1.7 1994/09/22 10:44:47 adam
49 * Don't remember what changed!!
51 * Revision 1.6 1994/09/16 15:39:21 adam
52 * Initial code of lookup - not tested yet.
54 * Revision 1.5 1994/09/06 13:05:29 adam
55 * Further development of insertion. Some special cases are
56 * not properly handled yet! assert(0) are put here. The
57 * binary search in each page definitely reduce usr CPU.
59 * Revision 1.4 1994/09/01 17:44:40 adam
60 * Work on insertion in dictionary. Not finished yet.
62 * Revision 1.3 1994/08/18 12:41:12 adam
63 * Some development of dictionary. Not finished at all!
65 * Revision 1.2 1994/08/17 13:32:33 adam
66 * Use cache in dict - not in bfile.
68 * Revision 1.1 1994/08/16 16:26:53 adam
78 typedef unsigned Dict_ptr;
79 typedef unsigned char Dict_char;
84 Dict_ptr free_list, last;
87 struct Dict_file_block
89 struct Dict_file_block *h_next, **h_prev;
90 struct Dict_file_block *lru_next, *lru_prev;
96 typedef struct Dict_file_struct
101 struct Dict_file_block *all_blocks;
102 struct Dict_file_block *free_list;
103 struct Dict_file_block **hash_array;
105 struct Dict_file_block *lru_back, *lru_front;
114 typedef struct Dict_struct {
117 struct Dict_head head;
121 #define DICT_MAGIC "dict00"
123 #define DICT_DEFAULT_PAGESIZE "4096"
125 int dict_bf_readp (Dict_BFile bf, int no, void **bufp);
126 int dict_bf_newp (Dict_BFile bf, int no, void **bufp);
127 int dict_bf_touch (Dict_BFile bf, int no);
128 void dict_bf_flush_blocks (Dict_BFile bf, int no_to_flush);
129 Dict_BFile dict_bf_open (const char *name, int block_size, int cache, int rw);
130 int dict_bf_close (Dict_BFile dbf);
132 Dict dict_open (const char *name, int cache, int rw);
133 int dict_close (Dict dict);
134 int dict_insert (Dict dict, const char *p, int userlen, void *userinfo);
135 int dict_delete (Dict dict, const char *p);
136 char *dict_lookup (Dict dict, const char *p);
137 int dict_lookup_ec (Dict dict, char *p, int range,
138 int (*f)(char *name));
139 int dict_lookup_grep (Dict dict, const char *p, int range, void *client,
141 int (*f)(char *name, const char *info,
143 int dict_strcmp (const Dict_char *s1, const Dict_char *s2);
144 int dict_strlen (const Dict_char *s);
145 int dict_scan (Dict dict, char *str,
146 int *before, int *after, void *client,
147 int (*f)(char *name, const char *info, int pos,
151 #define DICT_type(x) 0[(Dict_ptr*) x]
152 #define DICT_backptr(x) 1[(Dict_ptr*) x]
153 #define DICT_nextptr(x) 2[(Dict_ptr*) x]
154 #define DICT_nodir(x) 0[(short*)((char*)(x)+3*sizeof(Dict_ptr))]
155 #define DICT_size(x) 1[(short*)((char*)(x)+3*sizeof(Dict_ptr))]
156 #define DICT_infoffset (3*sizeof(Dict_ptr)+2*sizeof(short))
157 #define DICT_pagesize(x) ((x)->head.page_size)
159 #define DICT_to_str(x) sizeof(Dict_info)+sizeof(Dict_ptr)
163 backptr pointer to parent
164 nextptr pointer to next page (if any)
166 size size of strings,info,ptr entries