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