libraries/pyshapelib/pyshapelib_api.h

/* Header file for the PyShapelib API for other Python modules */
/* $Revision$ */

#ifndef PYSHAPELIB_API_H
#define PYSHAPELIB_API_H

typedef struct {
    /* Shapefile functions */
    SHPObject * (*SHPReadObject)(SHPHandle hSHP, int iShape);
    void (*SHPDestroyObject)(SHPObject * psObject);

    /* SHPTree functions */
    SHPTree * (*SHPCreateTree)(SHPHandle hSHP, int nDimension, int nMaxDepth,
                               double *padfBoundsMin, double *padfBoundsMax);
    void (*SHPDestroyTree)(SHPTree * hTree);
    int * (*SHPTreeFindLikelyShapes)(SHPTree * hTree, double * padfBoundsMin,
                                     double * padfBoundsMax, int *);
} PyShapeLibAPI;


/* Macro to import the shapelib module, extract the API pointer and
 * assign it to the variable given as argument */
#define PYSHAPELIB_IMPORT_API(apivariable)                                 \
{                                                                          \
    PyObject * shapelib = PyImport_ImportModule("shapelibc");              \
    if (shapelib)                                                          \
    {                                                                      \
        PyObject * c_api_func = PyObject_GetAttrString(shapelib, "c_api"); \
        if (c_api_func)                                                    \
        {                                                                  \
            PyObject * cobj = PyObject_CallObject(c_api_func, NULL);       \
            if (cobj)                                                      \
            {                                                              \
                (apivariable) = (PyShapeLibAPI*)PyCObject_AsVoidPtr(cobj); \
            }                                                              \
        }                                                                  \
    }                                                                      \
}


#endif /* PYSHAPELIB_API_H */
1	jan	1611	/* Header file for the PyShapelib API for other Python modules */
2			/* $Revision$ */
3
4			#ifndef PYSHAPELIB_API_H
5			#define PYSHAPELIB_API_H
6
7			typedef struct {
8			/* Shapefile functions */
9			SHPObject * (*SHPReadObject)(SHPHandle hSHP, int iShape);
10			void (SHPDestroyObject)(SHPObject psObject);
11
12			/* SHPTree functions */
13			SHPTree * (*SHPCreateTree)(SHPHandle hSHP, int nDimension, int nMaxDepth,
14			double padfBoundsMin, double padfBoundsMax);
15			void (SHPDestroyTree)(SHPTree hTree);
16			int * (SHPTreeFindLikelyShapes)(SHPTree hTree, double * padfBoundsMin,
17			double * padfBoundsMax, int *);
18			} PyShapeLibAPI;
19
20
21			/* Macro to import the shapelib module, extract the API pointer and
22			* assign it to the variable given as argument */
23			#define PYSHAPELIB_IMPORT_API(apivariable) \
24			{ \
25			PyObject * shapelib = PyImport_ImportModule("shapelibc"); \
26			if (shapelib) \
27			{ \
28			PyObject * c_api_func = PyObject_GetAttrString(shapelib, "c_api"); \
29			if (c_api_func) \
30			{ \
31			PyObject * cobj = PyObject_CallObject(c_api_func, NULL); \
32			if (cobj) \
33			{ \
34			(apivariable) = (PyShapeLibAPI*)PyCObject_AsVoidPtr(cobj); \
35			} \
36			} \
37			} \
38			}
39
40
41			#endif /* PYSHAPELIB_API_H */
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