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