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