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/*
** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
** distribution information.
*/
#include "gdbmobj.h"
static char *fetchkeyval(struct gdbmobj *obj, size_t *, char **, size_t *);
extern char *gdbm_dofetch(struct gdbmobj *, const char *, size_t, size_t *);
char *gdbmobj_firstkey(struct gdbmobj *obj, size_t *keylen, char **val,
size_t *vallen)
{
datum key;
if (!obj->has_dbf) return (0);
if (obj->prev_key) free(obj->prev_key);
obj->prev_key=0;
key=gdbm_firstkey(obj->dbf);
if (!key.dptr) return (0);
obj->prev_key=key.dptr;
obj->prev_key_len=key.dsize;
return (fetchkeyval(obj, keylen, val, vallen));
}
static char *fetchkeyval(struct gdbmobj *obj, size_t *keylen, char **val,
size_t *vallen)
{
if (!obj->prev_key) return (0);
*val=gdbm_dofetch(obj, obj->prev_key, obj->prev_key_len, vallen);
*keylen=obj->prev_key_len;
return (obj->prev_key);
}
char *gdbmobj_nextkey(struct gdbmobj *obj, size_t *keylen,
char **val, size_t *vallen)
{
datum dkey, key;
if (!obj->has_dbf || !obj->prev_key) return (0);
dkey.dptr=(char *)obj->prev_key;
dkey.dsize=obj->prev_key_len;
key=gdbm_nextkey(obj->dbf, dkey);
free(obj->prev_key);
obj->prev_key=key.dptr;
obj->prev_key_len=key.dsize;
return (fetchkeyval(obj, keylen, val, vallen));
}
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