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- """
- This module is for the miscellaneous GEOS routines, particularly the
- ones that return the area, distance, and length.
- """
- from ctypes import POINTER, c_double, c_int
-
- from django.contrib.gis.geos.libgeos import GEOM_PTR, GEOSFuncFactory
- from django.contrib.gis.geos.prototypes.errcheck import check_dbl, check_string
- from django.contrib.gis.geos.prototypes.geom import geos_char_p
-
- __all__ = ['geos_area', 'geos_distance', 'geos_length', 'geos_isvalidreason']
-
-
- class DblFromGeom(GEOSFuncFactory):
- """
- Argument is a Geometry, return type is double that is passed
- in by reference as the last argument.
- """
- restype = c_int # Status code returned
- errcheck = staticmethod(check_dbl)
-
-
- # ### ctypes prototypes ###
-
- # Area, distance, and length prototypes.
- geos_area = DblFromGeom('GEOSArea', argtypes=[GEOM_PTR, POINTER(c_double)])
- geos_distance = DblFromGeom('GEOSDistance', argtypes=[GEOM_PTR, GEOM_PTR, POINTER(c_double)])
- geos_length = DblFromGeom('GEOSLength', argtypes=[GEOM_PTR, POINTER(c_double)])
- geos_isvalidreason = GEOSFuncFactory(
- 'GEOSisValidReason', restype=geos_char_p, errcheck=check_string, argtypes=[GEOM_PTR]
- )
|
