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cpython/Modules/_sqlite/util.c at 3.5 · python/cpython · GitHub
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_sqlite
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util.c
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Modules
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_sqlite
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util.c
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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"
int
pysqlite_step
(
sqlite3_stmt
*
statement
,
pysqlite_Connection
*
connection
)
{
int
rc
;
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
}
return
rc
;
}
/**
* 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
)
{
int
errorcode
;
/* SQLite often doesn't report anything useful, unless you reset the statement first */
if
(
st
!=
NULL
) {
(
void
)
sqlite3_reset
(
st
);
}
errorcode
=
sqlite3_errcode
(
db
);
switch
(
errorcode
)
{
case
SQLITE_OK
:
PyErr_Clear
();
break
;
case
SQLITE_INTERNAL
:
case
SQLITE_NOTFOUND
:
PyErr_SetString
(
pysqlite_InternalError
,
sqlite3_errmsg
(
db
));
break
;
case
SQLITE_NOMEM
:
(
void
)
PyErr_NoMemory
();
break
;
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
:
PyErr_SetString
(
pysqlite_OperationalError
,
sqlite3_errmsg
(
db
));
break
;
case
SQLITE_CORRUPT
:
PyErr_SetString
(
pysqlite_DatabaseError
,
sqlite3_errmsg
(
db
));
break
;
case
SQLITE_TOOBIG
:
PyErr_SetString
(
pysqlite_DataError
,
sqlite3_errmsg
(
db
));
break
;
case
SQLITE_CONSTRAINT
:
case
SQLITE_MISMATCH
:
PyErr_SetString
(
pysqlite_IntegrityError
,
sqlite3_errmsg
(
db
));
break
;
case
SQLITE_MISUSE
:
PyErr_SetString
(
pysqlite_ProgrammingError
,
sqlite3_errmsg
(
db
));
break
;
default
:
PyErr_SetString
(
pysqlite_DatabaseError
,
sqlite3_errmsg
(
db
));
break
;
}
return
errorcode
;
}
#ifdef
WORDS_BIGENDIAN
# define
IS_LITTLE_ENDIAN
0
#else
# define
IS_LITTLE_ENDIAN
1
#endif
PyObject
*
_pysqlite_long_from_int64
(
sqlite_int64
value
)
{
#ifdef
HAVE_LONG_LONG
# if
SIZEOF_LONG_LONG
<
8
if
(
value
>
PY_LLONG_MAX
||
value
<
PY_LLONG_MIN
) {
return
_PyLong_FromByteArray
(
&
value
,
sizeof
(
value
),
IS_LITTLE_ENDIAN
,
1
/* signed */
);
}
# endif
# if
SIZEOF_LONG
<
SIZEOF_LONG_LONG
if
(
value
>
LONG_MAX
||
value
<
LONG_MIN
)
return
PyLong_FromLongLong
(
value
);
# endif
#else
# if
SIZEOF_LONG
<
8
if
(
value
>
LONG_MAX
||
value
<
LONG_MIN
) {
return
_PyLong_FromByteArray
(
&
value
,
sizeof
(
value
),
IS_LITTLE_ENDIAN
,
1
/* signed */
);
}
# endif
#endif
return
PyLong_FromLong
(
Py_SAFE_DOWNCAST
(
value
,
sqlite_int64
,
long
));
}
sqlite_int64
_pysqlite_long_as_int64
(
PyObject
*
py_val
)
{
int
overflow
;
#ifdef
HAVE_LONG_LONG
PY_LONG_LONG
value
=
PyLong_AsLongLongAndOverflow
(
py_val
,
&
overflow
);
#else
long
value
=
PyLong_AsLongAndOverflow
(
py_val
,
&
overflow
);
#endif
if
(
value
==
-1
&&
PyErr_Occurred
())
return
-1
;
if
(!
overflow
) {
#ifdef
HAVE_LONG_LONG
# if
SIZEOF_LONG_LONG
>
8
if
(
-0x8000000000000000LL
<=
value
&&
value
<=
0x7FFFFFFFFFFFFFFFLL
)
# endif
#else
# if
SIZEOF_LONG
>
8
if
(
-0x8000000000000000L
<=
value
&&
value
<=
0x7FFFFFFFFFFFFFFFL
)
# endif
#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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