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/*
** Copyright 1998 - 2000 Double Precision, Inc. See COPYING for
** distribution information.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "gdbmobj.h"
#include <stdlib.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
void gdbmobj_init(struct gdbmobj *obj)
{
obj->has_dbf=0;
obj->prev_key=0;
obj->prev_key_len=0;
}
void gdbmobj_close(struct gdbmobj *obj)
{
if (obj->has_dbf)
{
obj->has_dbf=0;
gdbm_close(obj->dbf);
}
if (obj->prev_key)
{
free(obj->prev_key);
obj->prev_key=0;
}
}
int gdbmobj_open(struct gdbmobj *obj, const char *filename, const char *modestr)
{
int mode=GDBM_READER;
for ( ; *modestr; modestr++)
switch (*modestr) {
case 'c':
case 'C':
mode=GDBM_WRCREAT;
break;
case 'w':
case 'W':
mode=GDBM_WRITER;
break;
case 'n':
case 'N':
mode=GDBM_NEWDB;
break;
}
gdbmobj_close(obj);
if ((obj->dbf=gdbm_open((char *)filename, 0, mode, 0664, 0)) != 0)
{
/* Where possible, set the close-on-exec bit */
#if HAVE_GDBM_FDESC
#ifdef FD_CLOEXEC
int fd=gdbm_fdesc(obj->dbf);
if (fd >= 0) fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
#endif
obj->has_dbf=1;
return (0);
}
return (-1);
}
int gdbmobj_store(struct gdbmobj *obj, const char *key, size_t keylen,
const char *data,
size_t datalen,
const char *mode)
{
datum dkey;
datum dval;
dkey.dptr=(char *)key;
dkey.dsize=keylen;
dval.dptr=(char *)data;
dval.dsize=datalen;
return (obj->has_dbf ? gdbm_store(obj->dbf, dkey, dval, (
*mode == 'i' || *mode == 'I' ?
GDBM_INSERT:GDBM_REPLACE)):-1);
}
int gdbmobj_exists(struct gdbmobj *obj, const char *key, size_t keylen)
{
datum dkey;
if (!obj->has_dbf) return (0);
dkey.dptr=(char *)key;
dkey.dsize=keylen;
if (gdbm_exists(obj->dbf, dkey)) return (1);
return (0);
}
char *gdbm_dofetch(struct gdbmobj *, const char *, size_t, size_t *);
char *gdbmobj_fetch(struct gdbmobj *obj, const char *key, size_t keylen,
size_t *datalen, const char *options)
{
char *p;
for (;;)
{
if ((p=gdbm_dofetch(obj, key, keylen, datalen)) != 0)
return (p);
if (!options) break;
if (*options == 'I')
{
while (keylen && key[--keylen] != '.')
;
if (!keylen) break;
continue;
}
if (*options == 'D')
{
size_t i;
for (i=0; i<keylen; i++)
if (key[i] == '@') { ++i; break; }
if (i < keylen)
{
if ((p=gdbm_dofetch(obj, key, i, datalen)) != 0)
return (p);
key += i;
keylen -= i;
continue;
}
for (i=0; i<keylen; i++)
if (key[i] == '.') { ++i; break; }
if (i < keylen)
{
key += i;
keylen -= i;
continue;
}
break;
}
break;
}
return (0);
}
char *gdbm_dofetch(struct gdbmobj *obj,
const char *key, size_t keylen, size_t *datalen)
{
datum dkey, val;
if (!obj->has_dbf) return (0);
dkey.dptr=(char *)key;
dkey.dsize=keylen;
val=gdbm_fetch(obj->dbf, dkey);
if (!val.dptr) return (0);
*datalen=val.dsize;
return (val.dptr);
}
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