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mapserver/mapscript/python/pymodule.i at main · rouault/mapserver · GitHub
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/*
*****************************************************************************
* Project: MapServer
* Purpose: Python-specific enhancements to MapScript
* Author: Sean Gillies, sgillies@frii.com
*
******************************************************************************
*
* Python-specific mapscript code has been moved into this
* SWIG interface file to improve the readability of the main
* interface file. The main mapscript.i file includes this
* file when SWIGPYTHON is defined (via 'swig -python ...').
*
****************************************************************************
*/
/*
*****************************************************************************
* Simple Typemaps
****************************************************************************
*/
/*
Translates Python None to C NULL for strings
*/
%typemap(in,parse=
"
z
"
)
char
*
"
"
;
/*
To support imageObj::getBytes
*/
%typemap(out) gdBuffer {
$result =
PyBytes_FromStringAndSize
((
const
char
*)$
1
.
data
, $
1
.
size
);
if
( $
1
.
owns_data
)
msFree
($
1
.
data
);
}
/*
* Typemap for counted arrays of doubles <- PySequence
*/
%typemap(in,numinputs=
1
) (
int
nListSize,
double
* pListValues)
{
int
i;
/*
%typemap(in,numinputs=1) (int nListSize, double* pListValues)
*/
/*
check if is List
*/
if
( !
PySequence_Check
($input) ) {
PyErr_SetString
(PyExc_TypeError,
"
not a sequence
"
);
SWIG_fail;
}
$
1
=
PySequence_Size
($input);
$
2
= (
double
*)
malloc
($
1
*
sizeof
(
double
));
for
( i =
0
; i<$
1
; i++ ) {
PyObject *o =
PySequence_GetItem
($input,i);
if
( !
PyArg_Parse
(o,
"
d
"
,&$
2
[i]) ) {
PyErr_SetString
(PyExc_TypeError,
"
not a number
"
);
Py_DECREF
(o);
SWIG_fail;
}
Py_DECREF
(o);
}
}
%fragment(
"
CreateTupleFromDoubleArray
"
,
"
header
"
) %{
static
PyObject *
CreateTupleFromDoubleArray
(
double
*first,
unsigned
int
size ) {
unsigned
int
i;
PyObject *out =
PyTuple_New
( size );
for
( i=
0
; i<size; i++ ) {
PyObject *val =
PyFloat_FromDouble
( *first );
++first;
PyTuple_SetItem
( out, i, val );
}
return
out;
}
%}
%typemap(freearg) (
int
nListSize,
double
* pListValues)
{
/*
%typemap(freearg) (int nListSize, double* pListValues)
*/
if
($
2
) {
free
((
void
*) $
2
);
}
}
%typemap(in,numinputs=
0
) (
double
** argout,
int
* pnListSize) (
double
* argout,
int
nListSize ) {
/*
%typemap(python,in,numinputs=0) (double *val, int*hasval)
*/
$
1
= &argout;
$
2
= &nListSize;
}
%typemap(argout,fragment=
"
t_output_helper,CreateTupleFromDoubleArray
"
) (
double
** argout,
int
* pnListSize)
{
/*
%typemap(argout) (double* argout, int* pnListSize)
*/
PyObject *r;
r =
CreateTupleFromDoubleArray
(*$
1
, *$
2
);
free
(*$
1
);
$result =
t_output_helper
($result,r);
}
/*
*************************************************************************
* MapServer Errors and Python Exceptions
**************************************************************************
*
* Translation of errors reported via the ms_error structure into
* Python exceptions. Original code by Chris Chamberlin <cdc@aracnet.com>
* has been updated by Sean Gillies <sgillies@frii.com> to use
* PyErr_SetString, %exception and $action for SWIG 1.3, do the most
* obvious mapping of MapServer errors to Python exceptions and map all
* others to a new 'MapServerError' exception which can be caught like this:
*
* from mapscript import *
* empty_map = mapObj('')
* try:
* img = empty_map.draw()
* except MapServerError, msg:
* print "Caught MapServerError:", msg
*
************************************************************************
*/
%{
PyObject *MSExc_MapServerError;
PyObject *MSExc_MapServerChildError;
%}
/*
Module initialization: call msSetup() and register msCleanup()
*/
%init %{
/*
See bug 1203 for discussion of race condition with GD font cache
*/
if
(
msSetup
() !=
MS_SUCCESS
)
{
msSetError
(
MS_MISCERR
,
"
Failed to set up threads and font cache
"
,
"
msSetup()
"
);
}
Py_AtExit
(msCleanup);
/*
Define Generic MapServer error
*/
MSExc_MapServerError=
PyErr_NewException
(
"
_mapscript.MapServerError
"
,
NULL
,
NULL
);
if
(MSExc_MapServerError !=
NULL
)
PyDict_SetItemString
(d,
"
MapServerError
"
, MSExc_MapServerError);
/*
Define MapServer MS_CHILD error
*/
MSExc_MapServerChildError =
PyErr_NewException
(
"
_mapscript.MapServerChildError
"
,
NULL
,
NULL
);
if
(MSExc_MapServerChildError !=
NULL
)
PyDict_SetItemString
(d,
"
MapServerChildError
"
, MSExc_MapServerChildError);
%}
%{
static
void
_raise_ms_exception
(
void
);
static
void
_raise_ms_exception
() {
int
errcode;
errorObj *ms_error;
char
*errmsg;
ms_error =
msGetErrorObj
();
errcode = ms_error->
code
;
errmsg =
msGetErrorString
(
"
\n
"
);
switch
(errcode) {
case
MS_IOERR
:
PyErr_SetString
(PyExc_IOError, errmsg);
break
;
case
MS_MEMERR
:
PyErr_SetString
(PyExc_MemoryError, errmsg);
break
;
case
MS_TYPEERR
:
PyErr_SetString
(PyExc_TypeError, errmsg);
break
;
case
MS_EOFERR
:
PyErr_SetString
(PyExc_EOFError, errmsg);
break
;
case
MS_CHILDERR
:
PyErr_SetString
(MSExc_MapServerChildError, errmsg);
break
;
default
:
PyErr_SetString
(MSExc_MapServerError, errmsg);
break
;
}
free
(errmsg);
}
%}
%exception {
$action {
errorObj *ms_error =
msGetErrorObj
();
switch
(ms_error->
code
) {
case
MS_NOERR
:
break
;
case
MS_NOTFOUND
:
msResetErrorList
();
break
;
case
-
1
:
break
;
case
MS_IOERR
:
if
(
strcmp
(ms_error->
routine
,
"
msSearchDiskTree()
"
) !=
0
) {
_raise_ms_exception
();
msResetErrorList
();
return
NULL
;
}
default
:
_raise_ms_exception
();
msResetErrorList
();
return
NULL
;
}
}
}
%pythoncode %{
MapServerError = _mapscript.
MapServerError
MapServerChildError = _mapscript.
MapServerChildError
%}
/*
The bogus "if 1:" is to introduce a new scope to work around indentation
handling with pythonappend in different versions. (#3180)
*/
%feature(
"
pythonappend
"
) layerObj %{
if
1
:
self.
p_map
=None
try
:
# python
2.5
if
args
and
len
(args)!=
0
:
self.
p_map
=args[
0
]
except NameError:
# python
2.6
if
map:
self.
p_map
=map
%}
/*
The bogus "if 1:" is to introduce a new scope to work around indentation
handling with pythonappend in different versions. (#3180)
*/
%feature(
"
pythonappend
"
) classObj %{
if
1
:
self.
p_layer
=None
try
:
# python
2.5
if
args
and
len
(args)!=
0
:
self.
p_layer
=args[
0
]
except NameError:
# python
2.6
if
layer:
self.
p_layer
=layer
%}
%feature(
"
shadow
"
) insertClass %{
def
insertClass
(*args):
actualIndex=$
action
(*args)
args[
1
].
p_layer
=args[
0
]
return
actualIndex%}
%feature(
"
shadow
"
) getClass %{
def
getClass
(*args):
clazz = $
action
(*args)
if
clazz:
if
args
and
len
(args)!=
0
:
clazz.
p_layer
=args[
0
]
else
:
clazz.
p_layer
=None
return
clazz%}
%feature(
"
shadow
"
) insertLayer %{
def
insertLayer
(*args):
actualIndex=$
action
(*args)
args[
1
].
p_map
=args[
0
]
return
actualIndex%}
%feature(
"
shadow
"
) getLayer %{
def
getLayer
(*args):
layer = $
action
(*args)
if
layer:
if
args
and
len
(args)!=
0
:
layer.
p_map
=args[
0
]
else
:
layer.
p_map
=None
return
layer%}
%feature(
"
shadow
"
) getLayerByName %{
def
getLayerByName
(*args):
layer = $
action
(*args)
if
layer:
if
args
and
len
(args)!=
0
:
layer.
p_map
=args[
0
]
else
:
layer.
p_map
=None
return
layer%}
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