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102 lines
3.6 KiB
C
102 lines
3.6 KiB
C
/* lobject.h - definition for the psycopg lobject type
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*
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* Copyright (C) 2006-2019 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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* psycopg2 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link this program with the OpenSSL library (or with
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* modified versions of OpenSSL that use the same license as OpenSSL),
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* and distribute linked combinations including the two.
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*
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* You must obey the GNU Lesser General Public License in all respects for
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* all of the code used other than OpenSSL.
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*
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* psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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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 <libpq/libpq-fs.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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char *smode; /* string mode if lobject was opened */
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int mode; /* numeric version of smode */
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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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RAISES_NEG HIDDEN int lobject_open(lobjectObject *self, connectionObject *conn,
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Oid oid, const char *smode, Oid new_oid,
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const char *new_file);
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RAISES_NEG HIDDEN int lobject_unlink(lobjectObject *self);
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RAISES_NEG HIDDEN int lobject_export(lobjectObject *self, const char *filename);
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RAISES_NEG HIDDEN Py_ssize_t lobject_read(lobjectObject *self, char *buf, size_t len);
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RAISES_NEG HIDDEN Py_ssize_t lobject_write(lobjectObject *self, const char *buf,
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size_t len);
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RAISES_NEG HIDDEN Py_ssize_t lobject_seek(lobjectObject *self, Py_ssize_t pos, int whence);
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RAISES_NEG HIDDEN Py_ssize_t lobject_tell(lobjectObject *self);
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RAISES_NEG HIDDEN int lobject_truncate(lobjectObject *self, size_t len);
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RAISES_NEG 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->autocommit) { \
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psyco_set_error(ProgrammingError, NULL, \
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"can't use a lobject outside of transactions"); \
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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, NULL, \
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"lobject isn't valid anymore"); \
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return NULL; \
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}
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/* Values for the lobject mode */
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#define LOBJECT_READ 1
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#define LOBJECT_WRITE 2
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#define LOBJECT_BINARY 4
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#define LOBJECT_TEXT 8
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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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