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/* util.c - various utility functions
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "module.h"
#include "connection.h"
// Returns non-NULL if a new exception should be raised
static PyObject *
get_exception_class(pysqlite_state *state, int errorcode)
{
switch (errorcode) {
case SQLITE_OK:
PyErr_Clear();
return NULL;
case SQLITE_INTERNAL:
case SQLITE_NOTFOUND:
return state->InternalError;
case SQLITE_NOMEM:
return PyErr_NoMemory();
case SQLITE_ERROR:
case SQLITE_PERM:
case SQLITE_ABORT:
case SQLITE_BUSY:
case SQLITE_LOCKED:
case SQLITE_READONLY:
case SQLITE_INTERRUPT:
case SQLITE_IOERR:
case SQLITE_FULL:
case SQLITE_CANTOPEN:
case SQLITE_PROTOCOL:
case SQLITE_EMPTY:
case SQLITE_SCHEMA:
return state->OperationalError;
case SQLITE_CORRUPT:
return state->DatabaseError;
case SQLITE_TOOBIG:
return state->DataError;
case SQLITE_CONSTRAINT:
case SQLITE_MISMATCH:
return state->IntegrityError;
case SQLITE_MISUSE:
case SQLITE_RANGE:
return state->InterfaceError;
default:
return state->DatabaseError;
}
}
static void
raise_exception(PyObject *type, int errcode, const char *errmsg)
{
PyObject *exc = NULL;
PyObject *args[] = { PyUnicode_FromString(errmsg), };
if (args[0] == NULL) {
goto exit;
}
exc = PyObject_Vectorcall(type, args, 1, NULL);
Py_DECREF(args[0]);
if (exc == NULL) {
goto exit;
}
PyObject *code = PyLong_FromLong(errcode);
if (code == NULL) {
goto exit;
}
int rc = PyObject_SetAttrString(exc, "sqlite_errorcode", code);
Py_DECREF(code);
if (rc < 0) {
goto exit;
}
const char *error_name = pysqlite_error_name(errcode);
PyObject *name;
if (error_name) {
name = PyUnicode_FromString(error_name);
}
else {
name = PyUnicode_InternFromString("unknown");
}
if (name == NULL) {
goto exit;
}
rc = PyObject_SetAttrString(exc, "sqlite_errorname", name);
Py_DECREF(name);
if (rc < 0) {
goto exit;
}
PyErr_SetObject(type, exc);
exit:
Py_XDECREF(exc);
}
/**
* Checks the SQLite error code and sets the appropriate DB-API exception.
* Returns the error code (0 means no error occurred).
*/
int
_pysqlite_seterror(pysqlite_state *state, sqlite3 *db)
{
int errorcode = sqlite3_errcode(db);
PyObject *exc_class = get_exception_class(state, errorcode);
if (exc_class == NULL) {
// No new exception need be raised; just pass the error code
return errorcode;
}
/* Create and set the exception. */
int extended_errcode = sqlite3_extended_errcode(db);
const char *errmsg = sqlite3_errmsg(db);
raise_exception(exc_class, extended_errcode, errmsg);
return extended_errcode;
}
#ifdef WORDS_BIGENDIAN
# define IS_LITTLE_ENDIAN 0
#else
# define IS_LITTLE_ENDIAN 1
#endif
sqlite_int64
_pysqlite_long_as_int64(PyObject * py_val)
{
int overflow;
long long value = PyLong_AsLongLongAndOverflow(py_val, &overflow);
if (value == -1 && PyErr_Occurred())
return -1;
if (!overflow) {
# if SIZEOF_LONG_LONG > 8
if (-0x8000000000000000LL <= value && value <= 0x7FFFFFFFFFFFFFFFLL)
# endif
return value;
}
else if (sizeof(value) < sizeof(sqlite_int64)) {
sqlite_int64 int64val;
if (_PyLong_AsByteArray((PyLongObject *)py_val,
(unsigned char *)&int64val, sizeof(int64val),
IS_LITTLE_ENDIAN, 1 /* signed */) >= 0) {
return int64val;
}
}
PyErr_SetString(PyExc_OverflowError,
"Python int too large to convert to SQLite INTEGER");
return -1;
}
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