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93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/* lobject.h - definition for the psycopg lobject type
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*
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* Copyright (C) 2006 Federico Di Gregorio <fog@debian.org>
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*
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* This file is part of psycopg.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef PSYCOPG_LOBJECT_H
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#define PSYCOPG_LOBJECT_H 1
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#include <Python.h>
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#include <libpq-fe.h>
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#include <libpq/libpq-fs.h>
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#include "psycopg/config.h"
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#include "psycopg/connection.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern HIDDEN PyTypeObject lobjectType;
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typedef struct {
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PyObject HEAD;
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connectionObject *conn; /* connection owning the lobject */
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long int mark; /* copied from conn->mark */
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const char *smode; /* string mode if lobject was opened */
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int fd; /* the file descriptor for file-like ops */
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Oid oid; /* the oid for this lobject */
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} lobjectObject;
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/* functions exported from lobject_int.c */
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HIDDEN int lobject_open(lobjectObject *self, connectionObject *conn,
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Oid oid, int mode, Oid new_oid,
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const char *new_file);
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HIDDEN int lobject_unlink(lobjectObject *self);
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HIDDEN int lobject_export(lobjectObject *self, const char *filename);
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HIDDEN Py_ssize_t lobject_read(lobjectObject *self, char *buf, size_t len);
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HIDDEN Py_ssize_t lobject_write(lobjectObject *self, const char *buf,
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size_t len);
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HIDDEN int lobject_seek(lobjectObject *self, int pos, int whence);
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HIDDEN int lobject_tell(lobjectObject *self);
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HIDDEN int lobject_close(lobjectObject *self);
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#define lobject_is_closed(self) \
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((self)->fd < 0 || !(self)->conn || (self)->conn->closed)
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/* exception-raising macros */
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#define EXC_IF_LOBJ_CLOSED(self) \
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if (lobject_is_closed(self)) { \
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PyErr_SetString(InterfaceError, "lobject already closed"); \
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return NULL; }
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#define EXC_IF_LOBJ_LEVEL0(self) \
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if (self->conn->isolation_level == 0) { \
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psyco_set_error(ProgrammingError, (PyObject*)self, \
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"can't use a lobject outside of transactions", NULL, NULL); \
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return NULL; \
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}
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#define EXC_IF_LOBJ_UNMARKED(self) \
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if (self->conn->mark != self->mark) { \
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psyco_set_error(ProgrammingError, (PyObject*)self, \
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"lobject isn't valid anymore", NULL, NULL); \
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return NULL; \
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* !defined(PSYCOPG_LOBJECT_H) */
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