d9898ee8 |
1 | /* |
2 | ** Copyright 1998 - 2000 Double Precision, Inc. See COPYING for |
3 | ** distribution information. |
4 | */ |
5 | |
6 | #if HAVE_CONFIG_H |
7 | #include "config.h" |
8 | #endif |
9 | |
10 | #include "gdbmobj.h" |
11 | #include <stdlib.h> |
12 | #if HAVE_FCNTL_H |
13 | #include <fcntl.h> |
14 | #endif |
15 | #if HAVE_UNISTD_H |
16 | #include <unistd.h> |
17 | #endif |
18 | |
19 | static const char rcsid[]="$Id: gdbmobj.c,v 1.9 2006/10/28 19:22:52 mrsam Exp $"; |
20 | |
21 | void gdbmobj_init(struct gdbmobj *obj) |
22 | { |
23 | obj->has_dbf=0; |
24 | obj->prev_key=0; |
25 | obj->prev_key_len=0; |
26 | } |
27 | |
28 | void gdbmobj_close(struct gdbmobj *obj) |
29 | { |
30 | if (obj->has_dbf) |
31 | { |
32 | obj->has_dbf=0; |
33 | gdbm_close(obj->dbf); |
34 | } |
35 | if (obj->prev_key) |
36 | { |
37 | free(obj->prev_key); |
38 | obj->prev_key=0; |
39 | } |
40 | } |
41 | |
42 | int gdbmobj_open(struct gdbmobj *obj, const char *filename, const char *modestr) |
43 | { |
44 | int mode=GDBM_READER; |
45 | |
46 | for ( ; *modestr; modestr++) |
47 | switch (*modestr) { |
48 | case 'c': |
49 | case 'C': |
50 | mode=GDBM_WRCREAT; |
51 | break; |
52 | case 'w': |
53 | case 'W': |
54 | mode=GDBM_WRITER; |
55 | break; |
56 | case 'n': |
57 | case 'N': |
58 | mode=GDBM_NEWDB; |
59 | break; |
60 | } |
61 | |
62 | gdbmobj_close(obj); |
63 | if ((obj->dbf=gdbm_open((char *)filename, 0, mode, 0664, 0)) != 0) |
64 | { |
65 | /* Where possible, set the close-on-exec bit */ |
66 | |
67 | #if HAVE_GDBM_FDESC |
68 | #ifdef FD_CLOEXEC |
69 | |
70 | int fd=gdbm_fdesc(obj->dbf); |
71 | |
72 | if (fd >= 0) fcntl(fd, F_SETFD, FD_CLOEXEC); |
73 | #endif |
74 | #endif |
75 | |
76 | obj->has_dbf=1; |
77 | return (0); |
78 | } |
79 | return (-1); |
80 | } |
81 | |
82 | int gdbmobj_store(struct gdbmobj *obj, const char *key, size_t keylen, |
83 | const char *data, |
84 | size_t datalen, |
85 | const char *mode) |
86 | { |
87 | datum dkey; |
88 | datum dval; |
89 | |
90 | dkey.dptr=(char *)key; |
91 | dkey.dsize=keylen; |
92 | |
93 | dval.dptr=(char *)data; |
94 | dval.dsize=datalen; |
95 | |
96 | return (obj->has_dbf ? gdbm_store(obj->dbf, dkey, dval, ( |
97 | *mode == 'i' || *mode == 'I' ? |
98 | GDBM_INSERT:GDBM_REPLACE)):-1); |
99 | } |
100 | |
101 | int gdbmobj_exists(struct gdbmobj *obj, const char *key, size_t keylen) |
102 | { |
103 | datum dkey; |
104 | |
105 | if (!obj->has_dbf) return (0); |
106 | |
107 | dkey.dptr=(char *)key; |
108 | dkey.dsize=keylen; |
109 | |
110 | if (gdbm_exists(obj->dbf, dkey)) return (1); |
111 | return (0); |
112 | } |
113 | |
114 | char *gdbm_dofetch(struct gdbmobj *, const char *, size_t, size_t *); |
115 | |
116 | char *gdbmobj_fetch(struct gdbmobj *obj, const char *key, size_t keylen, |
117 | size_t *datalen, const char *options) |
118 | { |
119 | char *p; |
120 | |
121 | for (;;) |
122 | { |
123 | if ((p=gdbm_dofetch(obj, key, keylen, datalen)) != 0) |
124 | return (p); |
125 | if (!options) break; |
126 | if (*options == 'I') |
127 | { |
128 | while (keylen && key[--keylen] != '.') |
129 | ; |
130 | if (!keylen) break; |
131 | continue; |
132 | } |
133 | if (*options == 'D') |
134 | { |
135 | size_t i; |
136 | |
137 | for (i=0; i<keylen; i++) |
138 | if (key[i] == '@') { ++i; break; } |
139 | if (i < keylen) |
140 | { |
141 | if ((p=gdbm_dofetch(obj, key, i, datalen)) != 0) |
142 | return (p); |
143 | key += i; |
144 | keylen -= i; |
145 | continue; |
146 | } |
147 | |
148 | for (i=0; i<keylen; i++) |
149 | if (key[i] == '.') { ++i; break; } |
150 | if (i < keylen) |
151 | { |
152 | key += i; |
153 | keylen -= i; |
154 | continue; |
155 | } |
156 | break; |
157 | } |
158 | break; |
159 | } |
160 | return (0); |
161 | } |
162 | |
163 | char *gdbm_dofetch(struct gdbmobj *obj, |
164 | const char *key, size_t keylen, size_t *datalen) |
165 | { |
166 | datum dkey, val; |
167 | |
168 | if (!obj->has_dbf) return (0); |
169 | |
170 | dkey.dptr=(char *)key; |
171 | dkey.dsize=keylen; |
172 | |
173 | val=gdbm_fetch(obj->dbf, dkey); |
174 | |
175 | if (!val.dptr) return (0); |
176 | *datalen=val.dsize; |
177 | return (val.dptr); |
178 | } |