mirror of https://github.com/python/cpython
668 lines
15 KiB
C
668 lines
15 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Berkeley DB interface.
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Author: Michael McLay
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Hacked: Guido van Rossum
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Btree and Recno additions plus sequence methods: David Ely
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XXX To do:
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- provide interface to the B-tree and record libraries too
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- provide a way to access the various hash functions
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- support more open flags
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*/
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#include "allobjects.h"
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#include "modsupport.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <db.h>
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/* Please don't include internal header files of the Berkeley db package
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(it messes up the info required in the Setup file) */
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typedef struct {
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OB_HEAD
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DB *di_bsddb;
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int di_size; /* -1 means recompute */
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} bsddbobject;
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staticforward typeobject Bsddbtype;
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#define is_bsddbobject(v) ((v)->ob_type == &Bsddbtype)
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static object *BsddbError;
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static object *
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newdbhashobject(file, flags, mode,
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bsize, ffactor, nelem, cachesize, hash, lorder)
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char *file;
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int flags;
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int mode;
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int bsize;
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int ffactor;
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int nelem;
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int cachesize;
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int hash; /* XXX ignored */
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int lorder;
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{
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bsddbobject *dp;
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HASHINFO info;
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if ((dp = NEWOBJ(bsddbobject, &Bsddbtype)) == NULL)
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return NULL;
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info.bsize = bsize;
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info.ffactor = ffactor;
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info.nelem = nelem;
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info.cachesize = cachesize;
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info.hash = NULL; /* XXX should derive from hash argument */
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info.lorder = lorder;
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if ((dp->di_bsddb = dbopen(file, flags, mode, DB_HASH, &info)) == NULL) {
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err_errno(BsddbError);
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DECREF(dp);
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return NULL;
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}
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dp->di_size = -1;
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return (object *)dp;
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}
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static object *
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newdbbtobject(file, flags, mode,
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btflags, cachesize, maxkeypage, minkeypage, psize, lorder)
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char *file;
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int flags;
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int mode;
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int btflags;
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int cachesize;
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int maxkeypage;
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int minkeypage;
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int psize;
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int lorder;
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{
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bsddbobject *dp;
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BTREEINFO info;
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if ((dp = NEWOBJ(bsddbobject, &Bsddbtype)) == NULL)
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return NULL;
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info.flags = btflags;
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info.cachesize = cachesize;
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info.maxkeypage = maxkeypage;
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info.minkeypage = minkeypage;
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info.psize = psize;
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info.lorder = lorder;
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info.compare = 0; /* Use default comparison functions, for now..*/
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info.prefix = 0;
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if ((dp->di_bsddb = dbopen(file, flags, mode, DB_BTREE, &info)) == NULL) {
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err_errno(BsddbError);
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DECREF(dp);
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return NULL;
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}
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dp->di_size = -1;
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return (object *)dp;
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}
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static object *
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newdbrnobject(file, flags, mode,
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rnflags, cachesize, psize, lorder, reclen, bval, bfname)
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char *file;
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int flags;
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int mode;
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int rnflags;
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int cachesize;
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int psize;
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int lorder;
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size_t reclen;
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u_char bval;
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char *bfname;
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{
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bsddbobject *dp;
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RECNOINFO info;
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if ((dp = NEWOBJ(bsddbobject, &Bsddbtype)) == NULL)
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return NULL;
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info.flags = rnflags;
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info.cachesize = cachesize;
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info.psize = psize;
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info.lorder = lorder;
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info.reclen = reclen;
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info.bval = bval;
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info.bfname = bfname;
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if ((dp->di_bsddb = dbopen(file, flags, mode, DB_RECNO, &info)) == NULL) {
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err_errno(BsddbError);
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DECREF(dp);
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return NULL;
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}
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dp->di_size = -1;
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return (object *)dp;
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}
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static void
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bsddb_dealloc(dp)
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bsddbobject *dp;
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{
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if (dp->di_bsddb != NULL) {
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if ((dp->di_bsddb->close)(dp->di_bsddb) != 0)
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fprintf(stderr,
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"Python bsddb: close errno %s in dealloc\n", errno);
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}
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DEL(dp);
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}
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static int
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bsddb_length(dp)
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bsddbobject *dp;
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{
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if (dp->di_size < 0) {
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DBT krec, drec;
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int status;
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int size = 0;
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for (status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec,R_FIRST);
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status == 0;
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status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, R_NEXT))
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size++;
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if (status < 0) {
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err_errno(BsddbError);
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return -1;
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}
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dp->di_size = size;
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}
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return dp->di_size;
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}
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static object *
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bsddb_subscript(dp, key)
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bsddbobject *dp;
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object *key;
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{
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int status;
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object *v;
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DBT krec, drec;
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char *data;
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int size;
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if (!getargs(key, "s#", &data, &size))
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return NULL;
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krec.data = data;
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krec.size = size;
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status = (dp->di_bsddb->get)(dp->di_bsddb, &krec, &drec, 0);
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if (status != 0) {
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if (status < 0)
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err_errno(BsddbError);
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else
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err_setval(KeyError, key);
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return NULL;
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}
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return newsizedstringobject((char *)drec.data, (int)drec.size);
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}
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static int
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bsddb_ass_sub(dp, key, value)
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bsddbobject *dp;
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object *key, *value;
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{
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int status;
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DBT krec, drec;
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char *data;
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int size;
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if (!getargs(key, "s#", &data, &size)) {
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err_setstr(TypeError, "bsddb key type must be string");
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return -1;
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}
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krec.data = data;
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krec.size = size;
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dp->di_size = -1;
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if (value == NULL) {
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status = (dp->di_bsddb->del)(dp->di_bsddb, &krec, 0);
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}
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else {
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if (!getargs(value, "s#", &data, &size)) {
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err_setstr(TypeError, "bsddb value type must be string");
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return -1;
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}
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drec.data = data;
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drec.size = size;
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status = (dp->di_bsddb->put)(dp->di_bsddb, &krec, &drec, 0);
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}
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if (status != 0) {
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if (status < 0)
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err_errno(BsddbError);
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else
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err_setval(KeyError, key);
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return -1;
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}
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return 0;
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}
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static mapping_methods bsddb_as_mapping = {
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(inquiry)bsddb_length, /*mp_length*/
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(binaryfunc)bsddb_subscript, /*mp_subscript*/
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(objobjargproc)bsddb_ass_sub, /*mp_ass_subscript*/
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};
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static object *
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bsddb_close(dp, args)
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bsddbobject *dp;
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object *args;
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{
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if (!getnoarg(args))
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return NULL;
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if (dp->di_bsddb != NULL) {
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if ((dp->di_bsddb->close)(dp->di_bsddb) != 0) {
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dp->di_bsddb = NULL;
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err_errno(BsddbError);
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return NULL;
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}
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}
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dp->di_bsddb = NULL;
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INCREF(None);
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return None;
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}
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static object *
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bsddb_keys(dp, args)
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bsddbobject *dp;
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object *args;
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{
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object *list, *item;
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DBT krec, drec;
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int status;
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int err;
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if (!getnoarg(args))
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return NULL;
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list = newlistobject(0);
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if (list == NULL)
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return NULL;
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for (status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, R_FIRST);
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status == 0;
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status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, R_NEXT)) {
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item = newsizedstringobject((char *)krec.data, (int)krec.size);
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if (item == NULL) {
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DECREF(list);
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return NULL;
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}
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err = addlistitem(list, item);
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DECREF(item);
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if (err != 0) {
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DECREF(list);
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return NULL;
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}
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}
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if (status < 0) {
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err_errno(BsddbError);
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DECREF(list);
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return NULL;
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}
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if (dp->di_size < 0)
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dp->di_size = getlistsize(list); /* We just did the work for this... */
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return list;
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}
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static object *
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bsddb_has_key(dp, args)
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bsddbobject *dp;
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object *args;
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{
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DBT krec, drec;
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int status;
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char *data;
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int size;
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if (!getargs(args, "s#", &data, &size))
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return NULL;
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krec.data = data;
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krec.size = size;
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status = (dp->di_bsddb->get)(dp->di_bsddb, &krec, &drec, 0);
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if (status < 0) {
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err_errno(BsddbError);
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return NULL;
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}
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return newintobject(status == 0);
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}
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static object *
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bsddb_set_location(dp, key)
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bsddbobject *dp;
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object *key;
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{
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int status;
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object *v;
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DBT krec, drec;
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char *data;
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int size;
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if (!getargs(key, "s#", &data, &size))
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return NULL;
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krec.data = data;
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krec.size = size;
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status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, R_CURSOR);
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if (status != 0) {
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if (status < 0)
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err_errno(BsddbError);
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else
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err_setval(KeyError, key);
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return NULL;
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}
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return mkvalue("s#s#", krec.data, krec.size, drec.data, drec.size);
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}
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static object *
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bsddb_seq(dp, args, sequence_request)
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bsddbobject *dp;
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object *args;
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int sequence_request;
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{
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int status;
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DBT krec, drec;
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if (!getnoarg(args))
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return NULL;
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krec.data = 0;
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krec.size = 0;
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status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, sequence_request);
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if (status != 0) {
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if (status < 0)
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err_errno(BsddbError);
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else
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err_setval(KeyError, args);
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return NULL;
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}
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return mkvalue("s#s#", krec.data, krec.size, drec.data, drec.size);
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}
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static object *
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bsddb_next(dp, key)
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bsddbobject *dp;
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object *key;
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{
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return bsddb_seq(dp, key, R_NEXT);
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}
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static object *
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bsddb_previous(dp, key)
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bsddbobject *dp;
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object *key;
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{
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return bsddb_seq(dp, key, R_PREV);
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}
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static object *
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bsddb_first(dp, key)
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bsddbobject *dp;
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object *key;
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{
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return bsddb_seq(dp, key, R_FIRST);
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}
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static object *
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bsddb_last(dp, key)
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bsddbobject *dp;
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object *key;
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{
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return bsddb_seq(dp, key, R_LAST);
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}
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static object *
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bsddb_sync(dp, args)
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bsddbobject *dp;
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object *args;
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{
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int status;
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status = (dp->di_bsddb->sync)(dp->di_bsddb, 0);
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if (status != 0) {
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err_errno(BsddbError);
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return NULL;
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}
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return newintobject(status = 0);
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}
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static struct methodlist bsddb_methods[] = {
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{"close", (method)bsddb_close},
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{"keys", (method)bsddb_keys},
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{"has_key", (method)bsddb_has_key},
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{"set_location", (method)bsddb_set_location},
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{"next", (method)bsddb_next},
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{"previous", (method)bsddb_previous},
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{"first", (method)bsddb_first},
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{"last", (method)bsddb_last},
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{"sync", (method)bsddb_sync},
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{NULL, NULL} /* sentinel */
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};
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static object *
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bsddb_getattr(dp, name)
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object *dp;
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char *name;
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{
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return findmethod(bsddb_methods, dp, name);
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}
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static typeobject Bsddbtype = {
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OB_HEAD_INIT(&Typetype)
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0,
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"bsddb",
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sizeof(bsddbobject),
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0,
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(destructor)bsddb_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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(getattrfunc)bsddb_getattr, /*tp_getattr*/
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0, /*tp_setattr*/
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0, /*tp_compare*/
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0, /*tp_repr*/
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0, /*tp_as_number*/
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0, /*tp_as_sequence*/
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&bsddb_as_mapping, /*tp_as_mapping*/
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};
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static object *
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bsdhashopen(self, args)
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object *self;
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object *args;
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{
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char *file;
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char *flag = NULL;
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int flags = O_RDONLY;
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int mode = 0666;
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int bsize = 0;
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int ffactor = 0;
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int nelem = 0;
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int cachesize = 0;
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int hash = 0; /* XXX currently ignored */
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int lorder = 0;
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if (!newgetargs(args, "s|siiiiiii",
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&file, &flag, &mode,
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&bsize, &ffactor, &nelem, &cachesize, &hash, &lorder))
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return NULL;
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if (flag != NULL) {
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/* XXX need a way to pass O_EXCL, O_EXLOCK, O_NONBLOCK, O_SHLOCK */
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if (flag[0] == 'r')
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flags = O_RDONLY;
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else if (flag[0] == 'w')
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flags = O_RDWR;
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else if (flag[0] == 'c')
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flags = O_RDWR|O_CREAT;
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else if (flag[0] == 'n')
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flags = O_RDWR|O_CREAT|O_TRUNC;
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else {
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err_setstr(BsddbError,
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"Flag should begin with 'r', 'w', 'c' or 'n'");
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return NULL;
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}
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if (flag[1] == 'l') {
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#if defined(O_EXLOCK) && defined(O_SHLOCK)
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if (flag[0] == 'r')
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flags |= O_SHLOCK;
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else
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flags |= O_EXLOCK;
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#else
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err_setstr(BsddbError, "locking not supported on this platform");
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return NULL;
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#endif
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}
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}
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return newdbhashobject(file, flags, mode,
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bsize, ffactor, nelem, cachesize, hash, lorder);
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}
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static object *
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bsdbtopen(self, args)
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object *self;
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object *args;
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{
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char *file;
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char *flag = NULL;
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int flags = O_RDONLY;
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|
int mode = 0666;
|
|
int cachesize = 0;
|
|
int maxkeypage;
|
|
int minkeypage;
|
|
int btflags;
|
|
unsigned int psize;
|
|
int lorder;
|
|
|
|
if (!newgetargs(args, "s|siiiiiii",
|
|
&file, &flag, &mode,
|
|
&btflags, &cachesize, &maxkeypage, &minkeypage, &psize, &lorder))
|
|
return NULL;
|
|
if (flag != NULL) {
|
|
/* XXX need a way to pass O_EXCL, O_EXLOCK, O_NONBLOCK, O_SHLOCK */
|
|
if (flag[0] == 'r')
|
|
flags = O_RDONLY;
|
|
else if (flag[0] == 'w')
|
|
flags = O_RDWR;
|
|
else if (flag[0] == 'c')
|
|
flags = O_RDWR|O_CREAT;
|
|
else if (flag[0] == 'n')
|
|
flags = O_RDWR|O_CREAT|O_TRUNC;
|
|
else {
|
|
err_setstr(BsddbError,
|
|
"Flag should begin with 'r', 'w', 'c' or 'n'");
|
|
return NULL;
|
|
}
|
|
if (flag[1] == 'l') {
|
|
#if defined(O_EXLOCK) && defined(O_SHLOCK)
|
|
if (flag[0] == 'r')
|
|
flags |= O_SHLOCK;
|
|
else
|
|
flags |= O_EXLOCK;
|
|
#else
|
|
err_setstr(BsddbError, "locking not supported on this platform");
|
|
return NULL;
|
|
#endif
|
|
}
|
|
}
|
|
return newdbbtobject(file, flags, mode,
|
|
btflags, cachesize, maxkeypage, minkeypage, psize, lorder);
|
|
}
|
|
static object *
|
|
bsdrnopen(self, args)
|
|
object *self;
|
|
object *args;
|
|
{
|
|
char *file;
|
|
char *flag = NULL;
|
|
int flags = O_RDONLY;
|
|
int mode = 0666;
|
|
int cachesize = 0;
|
|
int rnflags;
|
|
unsigned int psize;
|
|
int lorder;
|
|
size_t reclen;
|
|
char *bval;
|
|
char *bfname;
|
|
|
|
if (!newgetargs(args, "s|siiiiiiss",
|
|
&file, &flag, &mode,
|
|
&rnflags, &cachesize, &psize, &lorder, &reclen, &bval, &bfname))
|
|
return NULL;
|
|
if (flag != NULL) {
|
|
/* XXX need a way to pass O_EXCL, O_EXLOCK, O_NONBLOCK, O_SHLOCK */
|
|
if (flag[0] == 'r')
|
|
flags = O_RDONLY;
|
|
else if (flag[0] == 'w')
|
|
flags = O_RDWR;
|
|
else if (flag[0] == 'c')
|
|
flags = O_RDWR|O_CREAT;
|
|
else if (flag[0] == 'n')
|
|
flags = O_RDWR|O_CREAT|O_TRUNC;
|
|
else {
|
|
err_setstr(BsddbError,
|
|
"Flag should begin with 'r', 'w', 'c' or 'n'");
|
|
return NULL;
|
|
}
|
|
if (flag[1] == 'l') {
|
|
#if defined(O_EXLOCK) && defined(O_SHLOCK)
|
|
if (flag[0] == 'r')
|
|
flags |= O_SHLOCK;
|
|
else
|
|
flags |= O_EXLOCK;
|
|
#else
|
|
err_setstr(BsddbError, "locking not supported on this platform");
|
|
return NULL;
|
|
#endif
|
|
}
|
|
}
|
|
return newdbrnobject(file, flags, mode,
|
|
rnflags, cachesize, psize, lorder, bval[0], bfname);
|
|
}
|
|
|
|
static struct methodlist bsddbmodule_methods[] = {
|
|
{"hashopen", (method)bsdhashopen, 1},
|
|
{"btopen", (method)bsdbtopen, 1},
|
|
{"rnopen", (method)bsdrnopen, 1},
|
|
{0, 0},
|
|
};
|
|
|
|
void
|
|
initbsddb() {
|
|
object *m, *d;
|
|
|
|
m = initmodule("bsddb", bsddbmodule_methods);
|
|
d = getmoduledict(m);
|
|
BsddbError = newstringobject("bsddb.error");
|
|
if (BsddbError == NULL || dictinsert(d, "error", BsddbError))
|
|
fatal("can't define bsddb.error");
|
|
}
|