| 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 | |
| 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 | } |