util.c

/* 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"

intpysqlite_step(sqlite3_stmt*statement, pysqlite_Connection*connection)
{
intrc;

if (statement==NULL) {
/* this is a workaround for SQLite 3.5 and later. it now apparently
 * returns NULL for "no-operation" statements */
rc=SQLITE_OK;
 } else {
Py_BEGIN_ALLOW_THREADS
rc=sqlite3_step(statement);
Py_END_ALLOW_THREADS
 }

returnrc;
}

/**
 * Checks the SQLite error code and sets the appropriate DB-API exception.
 * Returns the error code (0 means no error occurred).
 */
int_pysqlite_seterror(sqlite3*db, sqlite3_stmt*st)
{
interrorcode=sqlite3_errcode(db);

switch (errorcode)
 {
caseSQLITE_OK:
PyErr_Clear();
break;
caseSQLITE_INTERNAL:
caseSQLITE_NOTFOUND:
PyErr_SetString(pysqlite_InternalError, sqlite3_errmsg(db));
break;
caseSQLITE_NOMEM:
 (void)PyErr_NoMemory();
break;
caseSQLITE_ERROR:
caseSQLITE_PERM:
caseSQLITE_ABORT:
caseSQLITE_BUSY:
caseSQLITE_LOCKED:
caseSQLITE_READONLY:
caseSQLITE_INTERRUPT:
caseSQLITE_IOERR:
caseSQLITE_FULL:
caseSQLITE_CANTOPEN:
caseSQLITE_PROTOCOL:
caseSQLITE_EMPTY:
caseSQLITE_SCHEMA:
PyErr_SetString(pysqlite_OperationalError, sqlite3_errmsg(db));
break;
caseSQLITE_CORRUPT:
PyErr_SetString(pysqlite_DatabaseError, sqlite3_errmsg(db));
break;
caseSQLITE_TOOBIG:
PyErr_SetString(pysqlite_DataError, sqlite3_errmsg(db));
break;
caseSQLITE_CONSTRAINT:
caseSQLITE_MISMATCH:
PyErr_SetString(pysqlite_IntegrityError, sqlite3_errmsg(db));
break;
caseSQLITE_MISUSE:
PyErr_SetString(pysqlite_ProgrammingError, sqlite3_errmsg(db));
break;
default:
PyErr_SetString(pysqlite_DatabaseError, sqlite3_errmsg(db));
break;
 }

returnerrorcode;
}

#ifdefWORDS_BIGENDIAN
# defineIS_LITTLE_ENDIAN 0
#else
# defineIS_LITTLE_ENDIAN 1
#endif

PyObject*
_pysqlite_long_from_int64(sqlite_int64value)
{
# ifSIZEOF_LONG_LONG<8
if (value>PY_LLONG_MAX||value<PY_LLONG_MIN) {
return_PyLong_FromByteArray(&value, sizeof(value),
IS_LITTLE_ENDIAN, 1/* signed */);
 }
# endif
# ifSIZEOF_LONG<SIZEOF_LONG_LONG
if (value>LONG_MAX||value<LONG_MIN)
returnPyLong_FromLongLong(value);
# endif
returnPyLong_FromLong(Py_SAFE_DOWNCAST(value, sqlite_int64, long));
}

sqlite_int64
_pysqlite_long_as_int64(PyObject*py_val)
{
intoverflow;
long longvalue=PyLong_AsLongLongAndOverflow(py_val, &overflow);
if (value==-1&&PyErr_Occurred())
return-1;
if (!overflow) {
# ifSIZEOF_LONG_LONG>8
if (-0x8000000000000000LL <= value&&value <= 0x7FFFFFFFFFFFFFFFLL)
# endif
returnvalue;
 }
elseif (sizeof(value) <sizeof(sqlite_int64)) {
sqlite_int64int64val;
if (_PyLong_AsByteArray((PyLongObject*)py_val,
 (unsigned char*)&int64val, sizeof(int64val),
IS_LITTLE_ENDIAN, 1/* signed */) >= 0) {
returnint64val;
 }
 }
PyErr_SetString(PyExc_OverflowError,
"Python int too large to convert to SQLite INTEGER");
return-1;
}