--- /dev/null
+/* adapter_binary.c - Binary objects
+ *
+ * Copyright (C) 2003 Federico Di Gregorio <fog@debian.org>
+ *
+ * This file is part of psycopg.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <Python.h>
+#include <structmember.h>
+#include <stringobject.h>
+
+#include <libpq-fe.h>
+#include <string.h>
+
+#define PSYCOPG_MODULE
+#include "psycopg/config.h"
+#include "psycopg/python.h"
+#include "psycopg/psycopg.h"
+#include "psycopg/connection.h"
+#include "psycopg/adapter_binary.h"
+#include "psycopg/microprotocols_proto.h"
+
+/** the quoting code */
+
+#ifndef PSYCOPG_OWN_QUOTING
+static unsigned char *
+binary_escape(unsigned char *from, unsigned int from_length,
+ unsigned int *to_length, PGconn *conn)
+{
+#if PG_MAJOR_VERSION > 8 || \
+ (PG_MAJOR_VERSION == 8 && PG_MINOR_VERSION > 1) || \
+ (PG_MAJOR_VERSION == 8 && PG_MINOR_VERSION == 1 && PG_PATCH_VERSION >= 4)
+ if (conn)
+ return PQescapeByteaConn(conn, from, from_length, to_length);
+ else
+#endif
+ return PQescapeBytea(from, from_length, to_length);
+}
+#else
+static unsigned char *
+binary_escape(unsigned char *from, unsigned int from_length,
+ unsigned int *to_length, PGconn *conn)
+{
+ unsigneed char *quoted, *chptr, *newptr;
+ int i, space, new_space;
+
+ space = from_length + 2;
+
+ Py_BEGIN_ALLOW_THREADS;
+
+ quoted = (unsigned char*)calloc(space, sizeof(char));
+ if (quoted == NULL) return NULL;
+
+ chptr = quoted;
+
+ for (i=0; i < len; i++) {
+ if (chptr - quoted > space - 6) {
+ new_space = space * ((space) / (i + 1)) + 2 + 6;
+ if (new_space - space < 1024) space += 1024;
+ else space = new_space;
+ newptr = (unsigned char *)realloc(quoted, space);
+ if (newptr == NULL) {
+ free(quoted);
+ return NULL;
+ }
+ /* chptr has to be moved to the new location*/
+ chptr = newptr + (chptr - quoted);
+ quoted = newptr;
+ Dprintf("binary_escape: reallocated %i bytes at %p", space,quoted);
+ }
+ if (from[i]) {
+ if (from[i] >= ' ' && from[i] <= '~') {
+ if (from[i] == '\'') {
+ *chptr = '\'';
+ chptr++;
+ *chptr = '\'';
+ chptr++;
+ }
+ else if (from[i] == '\\') {
+ memcpy(chptr, "\\\\\\\\", 4);
+ chptr += 4;
+ }
+ else {
+ /* leave it as it is if ascii printable */
+ *chptr = from[i];
+ chptr++;
+ }
+ }
+ else {
+ unsigned char c;
+
+ /* escape to octal notation \nnn */
+ *chptr++ = '\\';
+ *chptr++ = '\\';
+ c = from[i];
+ *chptr = ((c >> 6) & 0x07) + 0x30; chptr++;
+ *chptr = ((c >> 3) & 0x07) + 0x30; chptr++;
+ *chptr = ( c & 0x07) + 0x30; chptr++;
+ }
+ }
+ else {
+ /* escape null as \\000 */
+ memcpy(chptr, "\\\\000", 5);
+ chptr += 5;
+ }
+ }
+ *chptr = '\0';
+
+ Py_END_ALLOW_THREADS;
+
+ *to_size = chptr - quoted + 1;
+ return quoted;
+}
+#endif
+
+/* binary_quote - do the quote process on plain and unicode strings */
+
+static PyObject *
+binary_quote(binaryObject *self)
+{
+ char *to;
+ const char *buffer;
+ int buffer_len;
+ size_t len = 0;
+
+ /* if we got a plain string or a buffer we escape it and save the buffer */
+ if (PyString_Check(self->wrapped) || PyBuffer_Check(self->wrapped)) {
+ /* escape and build quoted buffer */
+ PyObject_AsCharBuffer(self->wrapped, &buffer, &buffer_len);
+
+ to = (char *)binary_escape((unsigned char*)buffer, buffer_len, &len,
+ self->conn ? ((connectionObject*)self->conn)->pgconn : NULL);
+ if (to == NULL) {
+ PyErr_NoMemory();
+ return NULL;
+ }
+
+ if (len > 0)
+ self->buffer = PyString_FromFormat("'%s'", to);
+ else
+ self->buffer = PyString_FromString("''");
+ PQfreemem(to);
+ }
+
+ /* if the wrapped object is not a string or a buffer, this is an error */
+ else {
+ PyErr_SetString(PyExc_TypeError, "can't escape non-string object");
+ return NULL;
+ }
+
+ return self->buffer;
+}
+
+/* binary_str, binary_getquoted - return result of quoting */
+
+static PyObject *
+binary_str(binaryObject *self)
+{
+ if (self->buffer == NULL) {
+ binary_quote(self);
+ }
+ Py_XINCREF(self->buffer);
+ return self->buffer;
+}
+
+PyObject *
+binary_getquoted(binaryObject *self, PyObject *args)
+{
+ if (!PyArg_ParseTuple(args, "")) return NULL;
+ return binary_str(self);
+}
+
+PyObject *
+binary_prepare(binaryObject *self, PyObject *args)
+{
+ connectionObject *conn;
+
+ if (!PyArg_ParseTuple(args, "O", &conn))
+ return NULL;
+
+ Py_XDECREF(self->conn);
+ if (conn) {
+ self->conn = (PyObject*)conn;
+ Py_INCREF(self->conn);
+ }
+
+ Py_INCREF(Py_None);
+ return Py_None;
+}
+
+PyObject *
+binary_conform(binaryObject *self, PyObject *args)
+{
+ PyObject *res, *proto;
+
+ if (!PyArg_ParseTuple(args, "O", &proto)) return NULL;
+
+ if (proto == (PyObject*)&isqlquoteType)
+ res = (PyObject*)self;
+ else
+ res = Py_None;
+
+ Py_INCREF(res);
+ return res;
+}
+
+/** the Binary object **/
+
+/* object member list */
+
+static struct PyMemberDef binaryObject_members[] = {
+ {"adapted", T_OBJECT, offsetof(binaryObject, wrapped), RO},
+ {"buffer", T_OBJECT, offsetof(binaryObject, buffer), RO},
+ {NULL}
+};
+
+/* object method table */
+
+static PyMethodDef binaryObject_methods[] = {
+ {"getquoted", (PyCFunction)binary_getquoted, METH_VARARGS,
+ "getquoted() -> wrapped object value as SQL-quoted binary string"},
+ {"prepare", (PyCFunction)binary_prepare, METH_VARARGS,
+ "prepare(conn) -> prepare for binary encoding using conn"},
+ {"__conform__", (PyCFunction)binary_conform, METH_VARARGS, NULL},
+ {NULL} /* Sentinel */
+};
+
+/* initialization and finalization methods */
+
+static int
+binary_setup(binaryObject *self, PyObject *str)
+{
+ Dprintf("binary_setup: init binary object at %p, refcnt = %d",
+ self, ((PyObject *)self)->ob_refcnt);
+
+ self->buffer = NULL;
+ self->conn = NULL;
+ self->wrapped = str;
+ Py_INCREF(self->wrapped);
+
+ Dprintf("binary_setup: good binary object at %p, refcnt = %d",
+ self, ((PyObject *)self)->ob_refcnt);
+ return 0;
+}
+
+static void
+binary_dealloc(PyObject* obj)
+{
+ binaryObject *self = (binaryObject *)obj;
+
+ Py_XDECREF(self->wrapped);
+ Py_XDECREF(self->buffer);
+ Py_XDECREF(self->conn);
+
+ Dprintf("binary_dealloc: deleted binary object at %p, refcnt = %d",
+ obj, obj->ob_refcnt);
+
+ obj->ob_type->tp_free(obj);
+}
+
+static int
+binary_init(PyObject *obj, PyObject *args, PyObject *kwds)
+{
+ PyObject *str;
+
+ if (!PyArg_ParseTuple(args, "O", &str))
+ return -1;
+
+ return binary_setup((binaryObject *)obj, str);
+}
+
+static PyObject *
+binary_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+ return type->tp_alloc(type, 0);
+}
+
+static void
+binary_del(PyObject* self)
+{
+ PyObject_Del(self);
+}
+
+static PyObject *
+binary_repr(binaryObject *self)
+{
+ return PyString_FromFormat("<psycopg2._psycopg.Binary object at %p>", self);
+}
+
+/* object type */
+
+#define binaryType_doc \
+"Binary(buffer) -> new binary object"
+
+PyTypeObject binaryType = {
+ PyObject_HEAD_INIT(NULL)
+ 0,
+ "psycopg2._psycopg.Binary",
+ sizeof(binaryObject),
+ 0,
+ binary_dealloc, /*tp_dealloc*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+
+ 0, /*tp_compare*/
+ (reprfunc)binary_repr, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+
+ 0, /*tp_call*/
+ (reprfunc)binary_str, /*tp_str*/
+ 0, /*tp_getattro*/
+ 0, /*tp_setattro*/
+ 0, /*tp_as_buffer*/
+
+ Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+
+ binaryType_doc, /*tp_doc*/
+
+ 0, /*tp_traverse*/
+ 0, /*tp_clear*/
+
+ 0, /*tp_richcompare*/
+ 0, /*tp_weaklistoffset*/
+
+ 0, /*tp_iter*/
+ 0, /*tp_iternext*/
+
+ /* Attribute descriptor and subclassing stuff */
+
+ binaryObject_methods, /*tp_methods*/
+ binaryObject_members, /*tp_members*/
+ 0, /*tp_getset*/
+ 0, /*tp_base*/
+ 0, /*tp_dict*/
+
+ 0, /*tp_descr_get*/
+ 0, /*tp_descr_set*/
+ 0, /*tp_dictoffset*/
+
+ binary_init, /*tp_init*/
+ 0, /*tp_alloc will be set to PyType_GenericAlloc in module init*/
+ binary_new, /*tp_new*/
+ (freefunc)binary_del, /*tp_free Low-level free-memory routine */
+ 0, /*tp_is_gc For PyObject_IS_GC */
+ 0, /*tp_bases*/
+ 0, /*tp_mro method resolution order */
+ 0, /*tp_cache*/
+ 0, /*tp_subclasses*/
+ 0 /*tp_weaklist*/
+};
+
+
+/** module-level functions **/
+
+PyObject *
+psyco_Binary(PyObject *module, PyObject *args)
+{
+ PyObject *str;
+
+ if (!PyArg_ParseTuple(args, "O", &str))
+ return NULL;
+
+ return PyObject_CallFunction((PyObject *)&binaryType, "O", str);
+}
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