Module errcheck
This module houses the error-checking routines used by the GDAL ctypes prototypes.
source linkFunctions
▷ def arg_byref(args, offset=-1) Return the pointer argument's by-reference value.
▶ def check_arg_errcode(result, func, cargs, cpl=False) The error code is returned in the last argument, by reference. Check its value with `check_err` before returning the result.
▶ def check_const_string(result, func, cargs, offset=None, cpl=False) Similar functionality to `check_string`, but does not free the pointer.
▶ def check_envelope(result, func, cargs, offset=-1) Check a function that returns an OGR Envelope by reference.
▶ def check_errcode(result, func, cargs, cpl=False) Check the error code returned (c_int).
▶ def check_geom(result, func, cargs) Check a function that returns a geometry.
▶ def check_geom_offset(result, func, cargs, offset=-1) Check the geometry at the given offset in the C parameter list.
▶ def check_pointer(result, func, cargs) Make sure the result pointer is valid.
▶ def check_str_arg(result, func, cargs) This is for the OSRGet[Angular|Linear]Units functions, which require that the returned string pointer not be freed. This returns both the double and string values.
▶ def check_string(result, func, cargs, offset=-1, str_result=False) Check the string output returned from the given function, and free
the string pointer allocated by OGR. The `str_result` keyword
may be used when the result is the string pointer, otherwise
the OGR error code is assumed. The `offset` keyword may be used
to extract the string pointer passed in by-reference at the given
slice offset in the function arguments.
Reexports
▷ def ptr_byref(args, offset=-1) Return the pointer argument passed in by-reference.