Adding cython v0.20.2 in third-party.

third_party/cython/src/Cython/Includes/cpython/exc.pxd

+from cpython.ref cimport PyObject
+
+cdef extern from "Python.h":
+
+    #####################################################################
+    # 3. Exception Handling
+    #####################################################################
+
+    # The functions described in this chapter will let you handle and
+    # raise Python exceptions. It is important to understand some of
+    # the basics of Python exception handling. It works somewhat like
+    # the Unix errno variable: there is a global indicator (per
+    # thread) of the last error that occurred. Most functions don't
+    # clear this on success, but will set it to indicate the cause of
+    # the error on failure. Most functions also return an error
+    # indicator, usually NULL if they are supposed to return a
+    # pointer, or -1 if they return an integer (exception: the
+    # PyArg_*() functions return 1 for success and 0 for failure).
+
+    # When a function must fail because some function it called
+    # failed, it generally doesn't set the error indicator; the
+    # function it called already set it. It is responsible for either
+    # handling the error and clearing the exception or returning after
+    # cleaning up any resources it holds (such as object references or
+    # memory allocations); it should not continue normally if it is
+    # not prepared to handle the error. If returning due to an error,
+    # it is important to indicate to the caller that an error has been
+    # set. If the error is not handled or carefully propagated,
+    # additional calls into the Python/C API may not behave as
+    # intended and may fail in mysterious ways.
+
+    # The error indicator consists of three Python objects
+    # corresponding to the Python variables sys.exc_type,
+    # sys.exc_value and sys.exc_traceback. API functions exist to
+    # interact with the error indicator in various ways. There is a
+    # separate error indicator for each thread.
+
+    void PyErr_Print()
+    # Print a standard traceback to sys.stderr and clear the error
+    # indicator. Call this function only when the error indicator is
+    # set. (Otherwise it will cause a fatal error!)
+
+    PyObject* PyErr_Occurred()
+    # Return value: Borrowed reference.
+    # Test whether the error indicator is set. If set, return the
+    # exception type (the first argument to the last call to one of
+    # the PyErr_Set*() functions or to PyErr_Restore()). If not set,
+    # return NULL. You do not own a reference to the return value, so
+    # you do not need to Py_DECREF() it. Note: Do not compare the
+    # return value to a specific exception; use
+    # PyErr_ExceptionMatches() instead, shown below. (The comparison
+    # could easily fail since the exception may be an instance instead
+    # of a class, in the case of a class exception, or it may the a
+    # subclass of the expected exception.)
+
+    bint PyErr_ExceptionMatches(object exc)
+    # Equivalent to "PyErr_GivenExceptionMatches(PyErr_Occurred(),
+    # exc)". This should only be called when an exception is actually
+    # set; a memory access violation will occur if no exception has
+    # been raised.
+
+    bint PyErr_GivenExceptionMatches(object given, object exc)
+    # Return true if the given exception matches the exception in
+    # exc. If exc is a class object, this also returns true when given
+    # is an instance of a subclass. If exc is a tuple, all exceptions
+    # in the tuple (and recursively in subtuples) are searched for a
+    # match. If given is NULL, a memory access violation will occur.
+
+    void PyErr_NormalizeException(PyObject** exc, PyObject** val, PyObject** tb)
+    # Under certain circumstances, the values returned by
+    # PyErr_Fetch() below can be ``unnormalized'', meaning that *exc
+    # is a class object but *val is not an instance of the same
+    # class. This function can be used to instantiate the class in
+    # that case. If the values are already normalized, nothing
+    # happens. The delayed normalization is implemented to improve
+    # performance.
+
+    void PyErr_Clear()
+    # Clear the error indicator. If the error indicator is not set, there is no effect.
+
+    void PyErr_Fetch(PyObject** ptype, PyObject** pvalue, PyObject** ptraceback)
+    # Retrieve the error indicator into three variables whose
+    # addresses are passed. If the error indicator is not set, set all
+    # three variables to NULL. If it is set, it will be cleared and
+    # you own a reference to each object retrieved. The value and
+    # traceback object may be NULL even when the type object is
+    # not. Note: This function is normally only used by code that
+    # needs to handle exceptions or by code that needs to save and
+    # restore the error indicator temporarily.
+
+    void PyErr_Restore(PyObject* type, PyObject* value, PyObject* traceback)
+    # Set the error indicator from the three objects. If the error
+    # indicator is already set, it is cleared first. If the objects
+    # are NULL, the error indicator is cleared. Do not pass a NULL
+    # type and non-NULL value or traceback. The exception type should
+    # be a class. Do not pass an invalid exception type or
+    # value. (Violating these rules will cause subtle problems later.)
+    # This call takes away a reference to each object: you must own a
+    # reference to each object before the call and after the call you
+    # no longer own these references. (If you don't understand this,
+    # don't use this function. I warned you.) Note: This function is
+    # normally only used by code that needs to save and restore the
+    # error indicator temporarily; use PyErr_Fetch() to save the
+    # current exception state.
+
+    void PyErr_SetString(object type, char *message)
+    # This is the most common way to set the error indicator. The
+    # first argument specifies the exception type; it is normally one
+    # of the standard exceptions, e.g. PyExc_RuntimeError. You need
+    # not increment its reference count. The second argument is an
+    # error message; it is converted to a string object.
+
+    void PyErr_SetObject(object type, object value)
+    # This function is similar to PyErr_SetString() but lets you
+    # specify an arbitrary Python object for the ``value'' of the
+    # exception.
+
+    PyObject* PyErr_Format(object exception, char *format, ...) except NULL
+    # Return value: Always NULL.
+    # This function sets the error indicator and returns
+    # NULL. exception should be a Python exception (class, not an
+    # instance). format should be a string, containing format codes,
+    # similar to printf(). The width.precision before a format code is
+    # parsed, but the width part is ignored.
+
+    void PyErr_SetNone(object type)
+    # This is a shorthand for "PyErr_SetObject(type, Py_None)".
+
+    int PyErr_BadArgument() except 0
+
+    # This is a shorthand for "PyErr_SetString(PyExc_TypeError,
+    # message)", where message indicates that a built-in operation was
+    # invoked with an illegal argument. It is mostly for internal use.
+
+    PyObject* PyErr_NoMemory() except NULL
+    # Return value: Always NULL.
+    # This is a shorthand for "PyErr_SetNone(PyExc_MemoryError)"; it
+    # returns NULL so an object allocation function can write "return
+    # PyErr_NoMemory();" when it runs out of memory.
+
+    PyObject* PyErr_SetFromErrno(object type) except NULL
+    # Return value: Always NULL.
+    # This is a convenience function to raise an exception when a C
+    # library function has returned an error and set the C variable
+    # errno. It constructs a tuple object whose first item is the
+    # integer errno value and whose second item is the corresponding
+    # error message (gotten from strerror()), and then calls
+    # "PyErr_SetObject(type, object)". On Unix, when the errno value
+    # is EINTR, indicating an interrupted system call, this calls
+    # PyErr_CheckSignals(), and if that set the error indicator,
+    # leaves it set to that. The function always returns NULL, so a
+    # wrapper function around a system call can write "return
+    # PyErr_SetFromErrno(type);" when the system call returns an
+    # error.
+
+    PyObject* PyErr_SetFromErrnoWithFilename(object type, char *filename) except NULL
+    # Return value: Always NULL.  Similar to PyErr_SetFromErrno(),
+    # with the additional behavior that if filename is not NULL, it is
+    # passed to the constructor of type as a third parameter. In the
+    # case of exceptions such as IOError and OSError, this is used to
+    # define the filename attribute of the exception instance.
+
+    PyObject* PyErr_SetFromWindowsErr(int ierr) except NULL
+    # Return value: Always NULL.  This is a convenience function to
+    # raise WindowsError. If called with ierr of 0, the error code
+    # returned by a call to GetLastError() is used instead. It calls
+    # the Win32 function FormatMessage() to retrieve the Windows
+    # description of error code given by ierr or GetLastError(), then
+    # it constructs a tuple object whose first item is the ierr value
+    # and whose second item is the corresponding error message (gotten
+    # from FormatMessage()), and then calls
+    # "PyErr_SetObject(PyExc_WindowsError, object)". This function
+    # always returns NULL. Availability: Windows.
+
+    PyObject* PyErr_SetExcFromWindowsErr(object type, int ierr) except NULL
+    # Return value: Always NULL.  Similar to
+    # PyErr_SetFromWindowsErr(), with an additional parameter
+    # specifying the exception type to be raised. Availability:
+    # Windows. New in version 2.3.
+
+    PyObject* PyErr_SetFromWindowsErrWithFilename(int ierr, char *filename) except NULL
+    # Return value: Always NULL.  Similar to
+    # PyErr_SetFromWindowsErr(), with the additional behavior that if
+    # filename is not NULL, it is passed to the constructor of
+    # WindowsError as a third parameter. Availability: Windows.
+
+    PyObject* PyErr_SetExcFromWindowsErrWithFilename(object type, int ierr, char *filename) except NULL
+    # Return value: Always NULL.
+    # Similar to PyErr_SetFromWindowsErrWithFilename(), with an
+    # additional parameter specifying the exception type to be
+    # raised. Availability: Windows.
+
+    void PyErr_BadInternalCall()
+    # This is a shorthand for "PyErr_SetString(PyExc_TypeError,
+    # message)", where message indicates that an internal operation
+    # (e.g. a Python/C API function) was invoked with an illegal
+    # argument. It is mostly for internal use.
+
+    int PyErr_WarnEx(object category, char *message, int stacklevel) except -1
+    # Issue a warning message. The category argument is a warning
+    # category (see below) or NULL; the message argument is a message
+    # string. stacklevel is a positive number giving a number of stack
+    # frames; the warning will be issued from the currently executing
+    # line of code in that stack frame. A stacklevel of 1 is the
+    # function calling PyErr_WarnEx(), 2 is the function above that,
+    # and so forth.
+
+    int PyErr_WarnExplicit(object category, char *message, char *filename, int lineno, char *module, object registry) except -1
+    # Issue a warning message with explicit control over all warning
+    # attributes. This is a straightforward wrapper around the Python
+    # function warnings.warn_explicit(), see there for more
+    # information. The module and registry arguments may be set to
+    # NULL to get the default effect described there.
+
+    int PyErr_CheckSignals() except -1
+    # This function interacts with Python's signal handling. It checks
+    # whether a signal has been sent to the processes and if so,
+    # invokes the corresponding signal handler. If the signal module
+    # is supported, this can invoke a signal handler written in
+    # Python. In all cases, the default effect for SIGINT is to raise
+    # the KeyboardInterrupt exception. If an exception is raised the
+    # error indicator is set and the function returns 1; otherwise the
+    # function returns 0. The error indicator may or may not be
+    # cleared if it was previously set.
+
+    void PyErr_SetInterrupt()
+    # This function simulates the effect of a SIGINT signal arriving
+    # -- the next time PyErr_CheckSignals() is called,
+    # KeyboardInterrupt will be raised. It may be called without
+    # holding the interpreter lock.
+
+    object PyErr_NewException(char *name, object base, object dict)
+    # Return value: New reference.
+    # This utility function creates and returns a new exception
+    # object. The name argument must be the name of the new exception,
+    # a C string of the form module.class. The base and dict arguments
+    # are normally NULL. This creates a class object derived from
+    # Exception (accessible in C as PyExc_Exception).
+
+    void PyErr_WriteUnraisable(object obj)
+    # This utility function prints a warning message to sys.stderr
+    # when an exception has been set but it is impossible for the
+    # interpreter to actually raise the exception. It is used, for
+    # example, when an exception occurs in an __del__() method.
+    #
+    # The function is called with a single argument obj that
+    # identifies the context in which the unraisable exception
+    # occurred. The repr of obj will be printed in the warning
+    # message.
+