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856 lines
19 KiB
856 lines
19 KiB
/* 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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Hacked by Gustavo Niemeyer <niemeyer@conectiva.com> fixing recno |
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support. |
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|
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XXX To do: |
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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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The windows port of the Berkeley DB code is hard to find on the web: |
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www.nightmare.com/software.html |
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*/ |
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|
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#include "Python.h" |
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#ifdef WITH_THREAD |
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#include "pythread.h" |
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#endif |
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|
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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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#ifdef HAVE_DB_185_H |
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#include <db_185.h> |
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#else |
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#include <db.h> |
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#endif |
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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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|
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typedef struct { |
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PyObject_HEAD |
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DB *di_bsddb; |
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int di_size; /* -1 means recompute */ |
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int di_type; |
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#ifdef WITH_THREAD |
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PyThread_type_lock di_lock; |
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#endif |
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} bsddbobject; |
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|
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static PyTypeObject Bsddbtype; |
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|
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#define is_bsddbobject(v) ((v)->ob_type == &Bsddbtype) |
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#define check_bsddbobject_open(v, r) if ((v)->di_bsddb == NULL) \ |
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{ PyErr_SetString(BsddbError, \ |
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"BSDDB object has already been closed"); \ |
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return r; } |
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|
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static PyObject *BsddbError; |
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|
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static PyObject * |
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newdbhashobject(char *file, int flags, int mode, |
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int bsize, int ffactor, int nelem, int cachesize, |
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int hash, int lorder) |
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{ |
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bsddbobject *dp; |
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HASHINFO info; |
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|
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if ((dp = PyObject_New(bsddbobject, &Bsddbtype)) == NULL) |
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return NULL; |
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|
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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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|
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#ifdef O_BINARY |
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flags |= O_BINARY; |
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#endif |
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Py_BEGIN_ALLOW_THREADS |
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dp->di_bsddb = dbopen(file, flags, mode, DB_HASH, &info); |
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Py_END_ALLOW_THREADS |
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if (dp->di_bsddb == NULL) { |
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PyErr_SetFromErrno(BsddbError); |
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#ifdef WITH_THREAD |
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dp->di_lock = NULL; |
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#endif |
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Py_DECREF(dp); |
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return NULL; |
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} |
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|
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dp->di_size = -1; |
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dp->di_type = DB_HASH; |
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|
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#ifdef WITH_THREAD |
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dp->di_lock = PyThread_allocate_lock(); |
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if (dp->di_lock == NULL) { |
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PyErr_SetString(BsddbError, "can't allocate lock"); |
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Py_DECREF(dp); |
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return NULL; |
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} |
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#endif |
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|
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return (PyObject *)dp; |
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} |
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|
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static PyObject * |
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newdbbtobject(char *file, int flags, int mode, |
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int btflags, int cachesize, int maxkeypage, |
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int minkeypage, int psize, int lorder) |
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{ |
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bsddbobject *dp; |
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BTREEINFO info; |
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|
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if ((dp = PyObject_New(bsddbobject, &Bsddbtype)) == NULL) |
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return NULL; |
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|
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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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|
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#ifdef O_BINARY |
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flags |= O_BINARY; |
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#endif |
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Py_BEGIN_ALLOW_THREADS |
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dp->di_bsddb = dbopen(file, flags, mode, DB_BTREE, &info); |
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Py_END_ALLOW_THREADS |
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if (dp->di_bsddb == NULL) { |
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PyErr_SetFromErrno(BsddbError); |
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#ifdef WITH_THREAD |
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dp->di_lock = NULL; |
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#endif |
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Py_DECREF(dp); |
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return NULL; |
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} |
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|
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dp->di_size = -1; |
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dp->di_type = DB_BTREE; |
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|
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#ifdef WITH_THREAD |
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dp->di_lock = PyThread_allocate_lock(); |
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if (dp->di_lock == NULL) { |
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PyErr_SetString(BsddbError, "can't allocate lock"); |
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Py_DECREF(dp); |
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return NULL; |
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} |
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#endif |
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|
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return (PyObject *)dp; |
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} |
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static PyObject * |
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newdbrnobject(char *file, int flags, int mode, |
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int rnflags, int cachesize, int psize, int lorder, |
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size_t reclen, u_char bval, char *bfname) |
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{ |
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bsddbobject *dp; |
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RECNOINFO info; |
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int fd; |
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|
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if ((dp = PyObject_New(bsddbobject, &Bsddbtype)) == NULL) |
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return NULL; |
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|
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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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|
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#ifdef O_BINARY |
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flags |= O_BINARY; |
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#endif |
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/* This is a hack to avoid a dbopen() bug that happens when |
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* it fails. */ |
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fd = open(file, flags); |
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if (fd == -1) { |
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dp->di_bsddb = NULL; |
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} |
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else { |
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close(fd); |
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Py_BEGIN_ALLOW_THREADS |
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dp->di_bsddb = dbopen(file, flags, mode, DB_RECNO, &info); |
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Py_END_ALLOW_THREADS |
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} |
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if (dp->di_bsddb == NULL) { |
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PyErr_SetFromErrno(BsddbError); |
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#ifdef WITH_THREAD |
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dp->di_lock = NULL; |
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#endif |
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Py_DECREF(dp); |
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return NULL; |
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} |
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dp->di_size = -1; |
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dp->di_type = DB_RECNO; |
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|
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#ifdef WITH_THREAD |
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dp->di_lock = PyThread_allocate_lock(); |
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if (dp->di_lock == NULL) { |
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PyErr_SetString(BsddbError, "can't allocate lock"); |
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Py_DECREF(dp); |
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return NULL; |
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} |
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#endif |
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|
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return (PyObject *)dp; |
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} |
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|
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static void |
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bsddb_dealloc(bsddbobject *dp) |
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{ |
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#ifdef WITH_THREAD |
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if (dp->di_lock) { |
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PyThread_acquire_lock(dp->di_lock, 0); |
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PyThread_release_lock(dp->di_lock); |
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PyThread_free_lock(dp->di_lock); |
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dp->di_lock = NULL; |
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} |
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#endif |
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if (dp->di_bsddb != NULL) { |
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int status; |
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Py_BEGIN_ALLOW_THREADS |
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status = (dp->di_bsddb->close)(dp->di_bsddb); |
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Py_END_ALLOW_THREADS |
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if (status != 0) |
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fprintf(stderr, |
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"Python bsddb: close errno %d in dealloc\n", |
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errno); |
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} |
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PyObject_Del(dp); |
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} |
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|
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#ifdef WITH_THREAD |
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#define BSDDB_BGN_SAVE(_dp) \ |
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Py_BEGIN_ALLOW_THREADS PyThread_acquire_lock(_dp->di_lock,1); |
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#define BSDDB_END_SAVE(_dp) \ |
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PyThread_release_lock(_dp->di_lock); Py_END_ALLOW_THREADS |
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#else |
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#define BSDDB_BGN_SAVE(_dp) Py_BEGIN_ALLOW_THREADS |
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#define BSDDB_END_SAVE(_dp) Py_END_ALLOW_THREADS |
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#endif |
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|
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static int |
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bsddb_length(bsddbobject *dp) |
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{ |
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check_bsddbobject_open(dp, -1); |
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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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BSDDB_BGN_SAVE(dp) |
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for (status = (dp->di_bsddb->seq)(dp->di_bsddb, |
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&krec, &drec,R_FIRST); |
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status == 0; |
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status = (dp->di_bsddb->seq)(dp->di_bsddb, |
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&krec, &drec, R_NEXT)) |
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size++; |
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BSDDB_END_SAVE(dp) |
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if (status < 0) { |
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PyErr_SetFromErrno(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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|
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static PyObject * |
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bsddb_subscript(bsddbobject *dp, PyObject *key) |
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{ |
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int status; |
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DBT krec, drec; |
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char *data,buf[4096]; |
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int size; |
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PyObject *result; |
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recno_t recno; |
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|
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if (dp->di_type == DB_RECNO) { |
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if (!PyArg_Parse(key, "i", &recno)) { |
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PyErr_SetString(PyExc_TypeError, |
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"key type must be integer"); |
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return NULL; |
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} |
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krec.data = &recno; |
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krec.size = sizeof(recno); |
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} |
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else { |
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if (!PyArg_Parse(key, "s#", &data, &size)) { |
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PyErr_SetString(PyExc_TypeError, |
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"key type must be string"); |
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return NULL; |
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} |
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krec.data = data; |
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krec.size = size; |
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} |
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check_bsddbobject_open(dp, NULL); |
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|
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BSDDB_BGN_SAVE(dp) |
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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 (drec.size > sizeof(buf)) data = malloc(drec.size); |
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else data = buf; |
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if (data!=NULL) memcpy(data,drec.data,drec.size); |
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} |
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BSDDB_END_SAVE(dp) |
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if (data==NULL) return PyErr_NoMemory(); |
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if (status != 0) { |
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if (status < 0) |
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PyErr_SetFromErrno(BsddbError); |
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else |
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PyErr_SetObject(PyExc_KeyError, key); |
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return NULL; |
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} |
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|
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result = PyString_FromStringAndSize(data, (int)drec.size); |
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if (data != buf) free(data); |
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return result; |
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} |
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|
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static int |
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bsddb_ass_sub(bsddbobject *dp, PyObject *key, PyObject *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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recno_t recno; |
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|
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if (dp->di_type == DB_RECNO) { |
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if (!PyArg_Parse(key, "i", &recno)) { |
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PyErr_SetString(PyExc_TypeError, |
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"bsddb key type must be integer"); |
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return -1; |
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} |
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krec.data = &recno; |
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krec.size = sizeof(recno); |
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} |
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else { |
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if (!PyArg_Parse(key, "s#", &data, &size)) { |
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PyErr_SetString(PyExc_TypeError, |
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"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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} |
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check_bsddbobject_open(dp, -1); |
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dp->di_size = -1; |
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if (value == NULL) { |
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BSDDB_BGN_SAVE(dp) |
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status = (dp->di_bsddb->del)(dp->di_bsddb, &krec, 0); |
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BSDDB_END_SAVE(dp) |
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} |
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else { |
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if (!PyArg_Parse(value, "s#", &data, &size)) { |
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PyErr_SetString(PyExc_TypeError, |
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"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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BSDDB_BGN_SAVE(dp) |
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status = (dp->di_bsddb->put)(dp->di_bsddb, &krec, &drec, 0); |
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BSDDB_END_SAVE(dp) |
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} |
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if (status != 0) { |
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if (status < 0) |
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PyErr_SetFromErrno(BsddbError); |
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else |
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PyErr_SetObject(PyExc_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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|
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static PyMappingMethods 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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|
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static PyObject * |
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bsddb_close(bsddbobject *dp) |
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{ |
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if (dp->di_bsddb != NULL) { |
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int status; |
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BSDDB_BGN_SAVE(dp) |
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status = (dp->di_bsddb->close)(dp->di_bsddb); |
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BSDDB_END_SAVE(dp) |
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if (status != 0) { |
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dp->di_bsddb = NULL; |
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PyErr_SetFromErrno(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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Py_INCREF(Py_None); |
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return Py_None; |
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} |
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|
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static PyObject * |
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bsddb_keys(bsddbobject *dp) |
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{ |
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PyObject *list, *item=NULL; |
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DBT krec, drec; |
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char *data=NULL,buf[4096]; |
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int status; |
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int err; |
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|
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check_bsddbobject_open(dp, NULL); |
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list = PyList_New(0); |
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if (list == NULL) |
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return NULL; |
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BSDDB_BGN_SAVE(dp) |
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status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, &drec, R_FIRST); |
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if (status == 0) { |
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if (krec.size > sizeof(buf)) data = malloc(krec.size); |
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else data = buf; |
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if (data != NULL) memcpy(data,krec.data,krec.size); |
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} |
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BSDDB_END_SAVE(dp) |
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if (status == 0 && data==NULL) return PyErr_NoMemory(); |
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while (status == 0) { |
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if (dp->di_type == DB_RECNO) |
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item = PyInt_FromLong(*((int*)data)); |
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else |
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item = PyString_FromStringAndSize(data, |
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(int)krec.size); |
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if (data != buf) free(data); |
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if (item == NULL) { |
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Py_DECREF(list); |
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return NULL; |
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} |
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err = PyList_Append(list, item); |
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Py_DECREF(item); |
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if (err != 0) { |
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Py_DECREF(list); |
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return NULL; |
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} |
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BSDDB_BGN_SAVE(dp) |
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status = (dp->di_bsddb->seq) |
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(dp->di_bsddb, &krec, &drec, R_NEXT); |
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if (status == 0) { |
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if (krec.size > sizeof(buf)) |
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data = malloc(krec.size); |
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else data = buf; |
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if (data != NULL) |
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memcpy(data,krec.data,krec.size); |
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} |
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BSDDB_END_SAVE(dp) |
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if (data == NULL) return PyErr_NoMemory(); |
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} |
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if (status < 0) { |
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PyErr_SetFromErrno(BsddbError); |
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Py_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 = PyList_Size(list); /* We just did the work */ |
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return list; |
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} |
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|
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static PyObject * |
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bsddb_has_key(bsddbobject *dp, PyObject *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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recno_t recno; |
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|
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if (dp->di_type == DB_RECNO) { |
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if (!PyArg_ParseTuple(args, "i;key type must be integer", |
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&recno)) { |
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return NULL; |
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} |
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krec.data = &recno; |
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krec.size = sizeof(recno); |
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} |
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else { |
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if (!PyArg_ParseTuple(args, "s#;key type must be string", |
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&data, &size)) { |
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return NULL; |
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} |
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krec.data = data; |
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krec.size = size; |
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} |
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check_bsddbobject_open(dp, NULL); |
|
|
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BSDDB_BGN_SAVE(dp) |
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status = (dp->di_bsddb->get)(dp->di_bsddb, &krec, &drec, 0); |
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BSDDB_END_SAVE(dp) |
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if (status < 0) { |
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PyErr_SetFromErrno(BsddbError); |
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return NULL; |
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} |
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|
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return PyInt_FromLong(status == 0); |
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} |
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|
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static PyObject * |
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bsddb_set_location(bsddbobject *dp, PyObject *key) |
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{ |
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int status; |
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DBT krec, drec; |
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char *data,buf[4096]; |
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int size; |
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PyObject *result; |
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recno_t recno; |
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|
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if (dp->di_type == DB_RECNO) { |
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if (!PyArg_ParseTuple(key, "i;key type must be integer", |
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&recno)) { |
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return NULL; |
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} |
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krec.data = &recno; |
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krec.size = sizeof(recno); |
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} |
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else { |
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if (!PyArg_ParseTuple(key, "s#;key type must be string", |
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&data, &size)) { |
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return NULL; |
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} |
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krec.data = data; |
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krec.size = size; |
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} |
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check_bsddbobject_open(dp, NULL); |
|
|
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BSDDB_BGN_SAVE(dp) |
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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 (drec.size > sizeof(buf)) data = malloc(drec.size); |
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else data = buf; |
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if (data!=NULL) memcpy(data,drec.data,drec.size); |
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} |
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BSDDB_END_SAVE(dp) |
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if (data==NULL) return PyErr_NoMemory(); |
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if (status != 0) { |
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if (status < 0) |
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PyErr_SetFromErrno(BsddbError); |
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else |
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PyErr_SetObject(PyExc_KeyError, key); |
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return NULL; |
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} |
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|
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if (dp->di_type == DB_RECNO) |
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result = Py_BuildValue("is#", *((int*)krec.data), |
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data, drec.size); |
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else |
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result = Py_BuildValue("s#s#", krec.data, krec.size, |
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data, drec.size); |
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if (data != buf) free(data); |
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return result; |
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} |
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|
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static PyObject * |
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bsddb_seq(bsddbobject *dp, int sequence_request) |
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{ |
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int status; |
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DBT krec, drec; |
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char *kdata=NULL,kbuf[4096]; |
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char *ddata=NULL,dbuf[4096]; |
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PyObject *result; |
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|
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check_bsddbobject_open(dp, NULL); |
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krec.data = 0; |
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krec.size = 0; |
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|
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BSDDB_BGN_SAVE(dp) |
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status = (dp->di_bsddb->seq)(dp->di_bsddb, &krec, |
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&drec, sequence_request); |
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if (status == 0) { |
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if (krec.size > sizeof(kbuf)) kdata = malloc(krec.size); |
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else kdata = kbuf; |
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if (kdata != NULL) memcpy(kdata,krec.data,krec.size); |
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if (drec.size > sizeof(dbuf)) ddata = malloc(drec.size); |
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else ddata = dbuf; |
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if (ddata != NULL) memcpy(ddata,drec.data,drec.size); |
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} |
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BSDDB_END_SAVE(dp) |
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if (status == 0) { |
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if ((kdata == NULL) || (ddata == NULL)) |
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return PyErr_NoMemory(); |
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} |
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else { |
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/* (status != 0) */ |
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if (status < 0) |
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PyErr_SetFromErrno(BsddbError); |
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else |
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PyErr_SetString(PyExc_KeyError, "no key/data pairs"); |
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return NULL; |
|
} |
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|
|
if (dp->di_type == DB_RECNO) |
|
result = Py_BuildValue("is#", *((int*)kdata), |
|
ddata, drec.size); |
|
else |
|
result = Py_BuildValue("s#s#", kdata, krec.size, |
|
ddata, drec.size); |
|
if (kdata != kbuf) free(kdata); |
|
if (ddata != dbuf) free(ddata); |
|
return result; |
|
} |
|
|
|
static PyObject * |
|
bsddb_next(bsddbobject *dp) |
|
{ |
|
return bsddb_seq(dp, R_NEXT); |
|
} |
|
static PyObject * |
|
bsddb_previous(bsddbobject *dp) |
|
{ |
|
return bsddb_seq(dp, R_PREV); |
|
} |
|
static PyObject * |
|
bsddb_first(bsddbobject *dp) |
|
{ |
|
return bsddb_seq(dp, R_FIRST); |
|
} |
|
static PyObject * |
|
bsddb_last(bsddbobject *dp) |
|
{ |
|
return bsddb_seq(dp, R_LAST); |
|
} |
|
static PyObject * |
|
bsddb_sync(bsddbobject *dp) |
|
{ |
|
int status; |
|
|
|
check_bsddbobject_open(dp, NULL); |
|
BSDDB_BGN_SAVE(dp) |
|
status = (dp->di_bsddb->sync)(dp->di_bsddb, 0); |
|
BSDDB_END_SAVE(dp) |
|
if (status != 0) { |
|
PyErr_SetFromErrno(BsddbError); |
|
return NULL; |
|
} |
|
return PyInt_FromLong(status = 0); |
|
} |
|
static PyMethodDef bsddb_methods[] = { |
|
{"close", (PyCFunction)bsddb_close, METH_NOARGS}, |
|
{"keys", (PyCFunction)bsddb_keys, METH_NOARGS}, |
|
{"has_key", (PyCFunction)bsddb_has_key, METH_VARARGS}, |
|
{"set_location", (PyCFunction)bsddb_set_location, METH_VARARGS}, |
|
{"next", (PyCFunction)bsddb_next, METH_NOARGS}, |
|
{"previous", (PyCFunction)bsddb_previous, METH_NOARGS}, |
|
{"first", (PyCFunction)bsddb_first, METH_NOARGS}, |
|
{"last", (PyCFunction)bsddb_last, METH_NOARGS}, |
|
{"sync", (PyCFunction)bsddb_sync, METH_NOARGS}, |
|
{NULL, NULL} /* sentinel */ |
|
}; |
|
|
|
static PyObject * |
|
bsddb_getattr(PyObject *dp, char *name) |
|
{ |
|
return Py_FindMethod(bsddb_methods, dp, name); |
|
} |
|
|
|
static PyTypeObject Bsddbtype = { |
|
PyObject_HEAD_INIT(NULL) |
|
0, |
|
"bsddb.bsddb", |
|
sizeof(bsddbobject), |
|
0, |
|
(destructor)bsddb_dealloc, /*tp_dealloc*/ |
|
0, /*tp_print*/ |
|
(getattrfunc)bsddb_getattr, /*tp_getattr*/ |
|
0, /*tp_setattr*/ |
|
0, /*tp_compare*/ |
|
0, /*tp_repr*/ |
|
0, /*tp_as_number*/ |
|
0, /*tp_as_sequence*/ |
|
&bsddb_as_mapping, /*tp_as_mapping*/ |
|
}; |
|
|
|
static PyObject * |
|
bsdhashopen(PyObject *self, PyObject *args) |
|
{ |
|
char *file; |
|
char *flag = NULL; |
|
int flags = O_RDONLY; |
|
int mode = 0666; |
|
int bsize = 0; |
|
int ffactor = 0; |
|
int nelem = 0; |
|
int cachesize = 0; |
|
int hash = 0; /* XXX currently ignored */ |
|
int lorder = 0; |
|
|
|
if (!PyArg_ParseTuple(args, "z|siiiiiii:hashopen", |
|
&file, &flag, &mode, |
|
&bsize, &ffactor, &nelem, &cachesize, |
|
&hash, &lorder)) |
|
return NULL; |
|
if (flag != NULL) { |
|
/* XXX need 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 { |
|
PyErr_SetString(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 |
|
PyErr_SetString(BsddbError, |
|
"locking not supported on this platform"); |
|
return NULL; |
|
#endif |
|
} |
|
} |
|
return newdbhashobject(file, flags, mode, |
|
bsize, ffactor, nelem, cachesize, hash, lorder); |
|
} |
|
|
|
static PyObject * |
|
bsdbtopen(PyObject *self, PyObject *args) |
|
{ |
|
char *file; |
|
char *flag = NULL; |
|
int flags = O_RDONLY; |
|
int mode = 0666; |
|
int cachesize = 0; |
|
int maxkeypage = 0; |
|
int minkeypage = 0; |
|
int btflags = 0; |
|
unsigned int psize = 0; |
|
int lorder = 0; |
|
|
|
if (!PyArg_ParseTuple(args, "z|siiiiiii:btopen", |
|
&file, &flag, &mode, |
|
&btflags, &cachesize, &maxkeypage, &minkeypage, |
|
&psize, &lorder)) |
|
return NULL; |
|
if (flag != NULL) { |
|
/* XXX need 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 { |
|
PyErr_SetString(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 |
|
PyErr_SetString(BsddbError, |
|
"locking not supported on this platform"); |
|
return NULL; |
|
#endif |
|
} |
|
} |
|
return newdbbtobject(file, flags, mode, |
|
btflags, cachesize, maxkeypage, minkeypage, |
|
psize, lorder); |
|
} |
|
|
|
static PyObject * |
|
bsdrnopen(PyObject *self, PyObject *args) |
|
{ |
|
char *file; |
|
char *flag = NULL; |
|
int flags = O_RDONLY; |
|
int mode = 0666; |
|
int cachesize = 0; |
|
int rnflags = 0; |
|
unsigned int psize = 0; |
|
int lorder = 0; |
|
size_t reclen = 0; |
|
char *bval = ""; |
|
char *bfname = NULL; |
|
|
|
if (!PyArg_ParseTuple(args, "z|siiiiiiss:rnopen", |
|
&file, &flag, &mode, |
|
&rnflags, &cachesize, &psize, &lorder, |
|
&reclen, &bval, &bfname)) |
|
return NULL; |
|
|
|
if (flag != NULL) { |
|
/* XXX need 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 { |
|
PyErr_SetString(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 |
|
PyErr_SetString(BsddbError, |
|
"locking not supported on this platform"); |
|
return NULL; |
|
#endif |
|
} |
|
else if (flag[1] != '\0') { |
|
PyErr_SetString(BsddbError, |
|
"Flag char 2 should be 'l' or absent"); |
|
return NULL; |
|
} |
|
} |
|
return newdbrnobject(file, flags, mode, rnflags, cachesize, |
|
psize, lorder, reclen, bval[0], bfname); |
|
} |
|
|
|
static PyMethodDef bsddbmodule_methods[] = { |
|
{"hashopen", (PyCFunction)bsdhashopen, METH_VARARGS}, |
|
{"btopen", (PyCFunction)bsdbtopen, METH_VARARGS}, |
|
{"rnopen", (PyCFunction)bsdrnopen, METH_VARARGS}, |
|
/* strictly for use by dbhhash!!! */ |
|
{"open", (PyCFunction)bsdhashopen, METH_VARARGS}, |
|
{0, 0}, |
|
}; |
|
|
|
PyMODINIT_FUNC |
|
initbsddb185(void) { |
|
PyObject *m, *d; |
|
|
|
Bsddbtype.ob_type = &PyType_Type; |
|
m = Py_InitModule("bsddb185", bsddbmodule_methods); |
|
d = PyModule_GetDict(m); |
|
BsddbError = PyErr_NewException("bsddb.error", NULL, NULL); |
|
if (BsddbError != NULL) |
|
PyDict_SetItemString(d, "error", BsddbError); |
|
}
|
|
|