556 lines
23 KiB
Python
556 lines
23 KiB
Python
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"""Module pygame.tests.test_utils.array
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Export the Exporter and Importer classes.
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Class Exporter has configurable shape and strides. Exporter objects
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provide a convient target for unit tests on Pygame objects and functions that
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import a new buffer interface.
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Class Importer imports a buffer interface with the given PyBUF_* flags.
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It returns NULL Py_buffer fields as None. The shape, strides, and suboffsets
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arrays are returned as tuples of ints. All Py_buffer field properties are
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read-only. This class is useful in comparing exported buffer interfaces
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with the actual request. The simular Python builtin memoryview currently
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does not support configurable PyBUF_* flags.
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This module contains its own unit tests. When Pygame is installed, these tests
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can be run with the following command line statement:
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python -m pygame.tests.test_utils.array
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"""
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import pygame
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if not pygame.HAVE_NEWBUF:
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emsg = "This Pygame build does not support the new buffer protocol"
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raise ImportError(emsg)
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import pygame.newbuffer
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from pygame.newbuffer import (PyBUF_SIMPLE, PyBUF_FORMAT, PyBUF_ND,
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PyBUF_WRITABLE, PyBUF_STRIDES, PyBUF_C_CONTIGUOUS,
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PyBUF_F_CONTIGUOUS, PyBUF_ANY_CONTIGUOUS,
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PyBUF_INDIRECT, PyBUF_STRIDED, PyBUF_STRIDED_RO,
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PyBUF_RECORDS, PyBUF_RECORDS_RO, PyBUF_FULL,
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PyBUF_FULL_RO, PyBUF_CONTIG, PyBUF_CONTIG_RO)
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import unittest
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import sys
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import ctypes
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import operator
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try:
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reduce
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except NameError:
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from functools import reduce
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__all__ = ["Exporter", "Importer"]
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try:
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ctypes.c_ssize_t
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except AttributeError:
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void_p_sz = ctypes.sizeof(ctypes.c_void_p)
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if ctypes.sizeof(ctypes.c_short) == void_p_sz:
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ctypes.c_ssize_t = ctypes.c_short
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elif ctypes.sizeof(ctypes.c_int) == void_p_sz:
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ctypes.c_ssize_t = ctypes.c_int
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elif ctypes.sizeof(ctypes.c_long) == void_p_sz:
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ctypes.c_ssize_t = ctypes.c_long
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elif ctypes.sizeof(ctypes.c_longlong) == void_p_sz:
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ctypes.c_ssize_t = ctypes.c_longlong
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else:
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raise RuntimeError("Cannot set c_ssize_t: sizeof(void *) is %i" %
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void_p_sz)
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def _prop_get(fn):
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return property(fn)
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class Exporter(pygame.newbuffer.BufferMixin):
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"""An object that exports a multi-dimension new buffer interface
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The only array operation this type supports is to export a buffer.
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"""
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prefixes = {'@': '', '=': '=', '<': '=', '>': '=', '!': '=',
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'2': '2', '3': '3', '4': '4', '5': '5',
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'6': '6', '7': '7', '8': '8', '9': '9'}
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types = {'c': ctypes.c_char, 'b': ctypes.c_byte, 'B': ctypes.c_ubyte,
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'=c': ctypes.c_int8, '=b': ctypes.c_int8, '=B': ctypes.c_uint8,
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'?': ctypes.c_bool, '=?': ctypes.c_int8,
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'h': ctypes.c_short, 'H': ctypes.c_ushort,
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'=h': ctypes.c_int16, '=H': ctypes.c_uint16,
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'i': ctypes.c_int, 'I': ctypes.c_uint,
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'=i': ctypes.c_int32, '=I': ctypes.c_uint32,
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'l': ctypes.c_long, 'L': ctypes.c_ulong,
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'=l': ctypes.c_int32, '=L': ctypes.c_uint32,
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'q': ctypes.c_longlong, 'Q': ctypes.c_ulonglong,
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'=q': ctypes.c_int64, '=Q': ctypes.c_uint64,
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'f': ctypes.c_float, 'd': ctypes.c_double,
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'P': ctypes.c_void_p,
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'x': ctypes.c_ubyte * 1,
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'2x': ctypes.c_ubyte * 2,
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'3x': ctypes.c_ubyte * 3,
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'4x': ctypes.c_ubyte * 4,
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'5x': ctypes.c_ubyte * 5,
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'6x': ctypes.c_ubyte * 6,
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'7x': ctypes.c_ubyte * 7,
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'8x': ctypes.c_ubyte * 8,
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'9x': ctypes.c_ubyte * 9}
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def __init__(self,
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shape,
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format=None,
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strides=None,
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readonly=None,
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itemsize=None):
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if format is None:
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format = 'B'
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if readonly is None:
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readonly = False
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prefix = ''
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typecode = ''
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i = 0
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if i < len(format):
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try:
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prefix = self.prefixes[format[i]]
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i += 1
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except LookupError:
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pass
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if i < len(format) and format[i] == '1':
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i += 1
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if i == len(format) - 1:
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typecode = format[i]
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if itemsize is None:
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try:
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itemsize = ctypes.sizeof(self.types[prefix + typecode])
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except KeyError:
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raise ValueError("Unknown item format '" + format + "'")
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self.readonly = bool(readonly)
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self.format = format
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self._format = ctypes.create_string_buffer(format.encode('latin_1'))
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self.ndim = len(shape)
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self.itemsize = itemsize
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self.len = reduce(operator.mul, shape, 1) * self.itemsize
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self.shape = tuple(shape)
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self._shape = (ctypes.c_ssize_t * self.ndim)(*self.shape)
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if strides is None:
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self._strides = (ctypes.c_ssize_t * self.ndim)()
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self._strides[self.ndim - 1] = itemsize
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for i in range(self.ndim - 1, 0, -1):
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self._strides[i - 1] = self.shape[i] * self._strides[i]
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self.strides = tuple(self._strides)
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elif len(strides) == self.ndim:
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self.strides = tuple(strides)
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self._strides = (ctypes.c_ssize_t * self.ndim)(*self.strides)
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else:
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raise ValueError("Mismatch in length of strides and shape")
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buflen = max(d * abs(s) for d, s in zip(self.shape, self.strides))
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self.buflen = buflen
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self._buf = (ctypes.c_ubyte * buflen)()
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offset = sum((d - 1) * abs(s)
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for d, s in zip(self.shape, self.strides) if s < 0)
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self.buf = ctypes.addressof(self._buf) + offset
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def buffer_info(self):
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return (addressof(self.buffer), self.shape[0])
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def tobytes(self):
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return cast(self.buffer, POINTER(c_char))[0:self._len]
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def __len__(self):
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return self.shape[0]
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def _get_buffer(self, view, flags):
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from ctypes import addressof
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if (flags & PyBUF_WRITABLE) == PyBUF_WRITABLE and self.readonly:
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raise BufferError("buffer is read-only")
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if ((flags & PyBUF_C_CONTIGUOUS) == PyBUF_C_CONTIGUOUS and
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not self.is_contiguous('C')):
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raise BufferError("data is not C contiguous")
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if ((flags & PyBUF_F_CONTIGUOUS) == PyBUF_F_CONTIGUOUS and
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not self.is_contiguous('F')):
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raise BufferError("data is not F contiguous")
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if ((flags & PyBUF_ANY_CONTIGUOUS) == PyBUF_ANY_CONTIGUOUS and
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not self.is_contiguous('A')):
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raise BufferError("data is not contiguous")
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view.buf = self.buf
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view.readonly = self.readonly
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view.len = self.len
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if flags | PyBUF_WRITABLE == PyBUF_WRITABLE:
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view.ndim = 0
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else:
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view.ndim = self.ndim
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view.itemsize = self.itemsize
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if (flags & PyBUF_FORMAT) == PyBUF_FORMAT:
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view.format = addressof(self._format)
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else:
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view.format = None
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if (flags & PyBUF_ND) == PyBUF_ND:
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view.shape = addressof(self._shape)
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elif self.is_contiguous('C'):
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view.shape = None
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else:
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raise BufferError(
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"shape required for {} dimensional data".format(self.ndim))
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if (flags & PyBUF_STRIDES) == PyBUF_STRIDES:
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view.strides = ctypes.addressof(self._strides)
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elif view.shape is None or self.is_contiguous('C'):
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view.strides = None
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else:
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raise BufferError("strides required for none C contiguous data")
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view.suboffsets = None
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view.internal = None
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view.obj = self
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def is_contiguous(self, fortran):
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if fortran in "CA":
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if self.strides[-1] == self.itemsize:
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for i in range(self.ndim - 1, 0, -1):
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if self.strides[i - 1] != self.shape[i] * self.strides[i]:
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break
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else:
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return True
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if fortran in "FA":
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if self.strides[0] == self.itemsize:
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for i in range(0, self.ndim - 1):
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if self.strides[i + 1] != self.shape[i] * self.strides[i]:
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break
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else:
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return True
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return False
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class Importer(object):
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"""An object that imports a new buffer interface
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The fields of the Py_buffer C struct are exposed by identically
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named Importer read-only properties.
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"""
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def __init__(self, obj, flags):
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self._view = pygame.newbuffer.Py_buffer()
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self._view.get_buffer(obj, flags)
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@property
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def obj(self):
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"""return object or None for NULL field"""
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return self._view.obj
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@property
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def buf(self):
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"""return int or None for NULL field"""
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return self._view.buf
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@property
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def len(self):
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"""return int"""
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return self._view.len
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@property
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def readonly(self):
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"""return bool"""
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return self._view.readonly
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@property
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def format(self):
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"""return bytes or None for NULL field"""
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format_addr = self._view.format
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if format_addr is None:
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return None
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return ctypes.cast(format_addr, ctypes.c_char_p).value.decode('ascii')
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@property
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def itemsize(self):
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"""return int"""
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return self._view.itemsize
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@property
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def ndim(self):
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"""return int"""
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return self._view.ndim
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@property
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def shape(self):
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"""return int tuple or None for NULL field"""
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return self._to_ssize_tuple(self._view.shape)
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@property
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def strides(self):
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"""return int tuple or None for NULL field"""
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return self._to_ssize_tuple(self._view.strides)
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@property
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def suboffsets(self):
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"""return int tuple or None for NULL field"""
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return self._to_ssize_tuple(self._view.suboffsets)
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@property
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def internal(self):
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"""return int or None for NULL field"""
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return self._view.internal
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def _to_ssize_tuple(self, addr):
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from ctypes import cast, POINTER, c_ssize_t
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if addr is None:
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return None
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return tuple(cast(addr, POINTER(c_ssize_t))[0:self._view.ndim])
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class ExporterTest(unittest.TestCase):
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"""Class Exporter unit tests"""
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def test_formats(self):
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char_sz = ctypes.sizeof(ctypes.c_char)
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short_sz = ctypes.sizeof(ctypes.c_short)
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int_sz = ctypes.sizeof(ctypes.c_int)
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long_sz = ctypes.sizeof(ctypes.c_long)
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longlong_sz = ctypes.sizeof(ctypes.c_longlong)
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float_sz = ctypes.sizeof(ctypes.c_float)
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double_sz = ctypes.sizeof(ctypes.c_double)
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voidp_sz = ctypes.sizeof(ctypes.c_void_p)
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bool_sz = ctypes.sizeof(ctypes.c_bool)
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self.check_args(0, (1,), 'B', (1,), 1, 1, 1)
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self.check_args(1, (1,), 'b', (1,), 1, 1, 1)
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self.check_args(1, (1,), 'B', (1,), 1, 1, 1)
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self.check_args(1, (1,), 'c', (char_sz,), char_sz, char_sz, char_sz)
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self.check_args(1, (1,), 'h', (short_sz,), short_sz, short_sz, short_sz)
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self.check_args(1, (1,), 'H', (short_sz,), short_sz, short_sz, short_sz)
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self.check_args(1, (1,), 'i', (int_sz,), int_sz, int_sz, int_sz)
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self.check_args(1, (1,), 'I', (int_sz,), int_sz, int_sz, int_sz)
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self.check_args(1, (1,), 'l', (long_sz,), long_sz, long_sz, long_sz)
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self.check_args(1, (1,), 'L', (long_sz,), long_sz, long_sz, long_sz)
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self.check_args(1, (1,), 'q', (longlong_sz,),
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longlong_sz, longlong_sz, longlong_sz)
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self.check_args(1, (1,), 'Q', (longlong_sz,),
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longlong_sz, longlong_sz, longlong_sz)
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self.check_args(1, (1,), 'f', (float_sz,), float_sz, float_sz, float_sz)
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self.check_args(1, (1,), 'd', (double_sz,),
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double_sz, double_sz, double_sz)
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self.check_args(1, (1,), 'x', (1,), 1, 1, 1)
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self.check_args(1, (1,), 'P', (voidp_sz,), voidp_sz, voidp_sz, voidp_sz)
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self.check_args(1, (1,), '?', (bool_sz,), bool_sz, bool_sz, bool_sz)
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self.check_args(1, (1,), '@b', (1,), 1, 1, 1)
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self.check_args(1, (1,), '@B', (1,), 1, 1, 1)
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self.check_args(1, (1,), '@c', (char_sz,), char_sz, char_sz, char_sz)
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self.check_args(1, (1,), '@h', (short_sz,),
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short_sz, short_sz, short_sz)
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self.check_args(1, (1,), '@H', (short_sz,),
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short_sz, short_sz, short_sz)
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|
|
self.check_args(1, (1,), '@i', (int_sz,), int_sz, int_sz, int_sz)
|
||
|
|
self.check_args(1, (1,), '@I', (int_sz,), int_sz, int_sz, int_sz)
|
||
|
|
self.check_args(1, (1,), '@l', (long_sz,), long_sz, long_sz, long_sz)
|
||
|
|
self.check_args(1, (1,), '@L', (long_sz,), long_sz, long_sz, long_sz)
|
||
|
|
self.check_args(1, (1,), '@q',
|
||
|
|
(longlong_sz,), longlong_sz, longlong_sz, longlong_sz)
|
||
|
|
self.check_args(1, (1,), '@Q', (longlong_sz,),
|
||
|
|
longlong_sz, longlong_sz, longlong_sz)
|
||
|
|
self.check_args(1, (1,), '@f', (float_sz,),
|
||
|
|
float_sz, float_sz, float_sz)
|
||
|
|
self.check_args(1, (1,), '@d', (double_sz,),
|
||
|
|
double_sz, double_sz, double_sz)
|
||
|
|
self.check_args(1, (1,), '@?', (bool_sz,), bool_sz, bool_sz, bool_sz)
|
||
|
|
self.check_args(1, (1,), '=b', (1,), 1, 1, 1)
|
||
|
|
self.check_args(1, (1,), '=B', (1,), 1, 1, 1)
|
||
|
|
self.check_args(1, (1,), '=c', (1,), 1, 1, 1)
|
||
|
|
self.check_args(1, (1,), '=h', (2,), 2, 2, 2)
|
||
|
|
self.check_args(1, (1,), '=H', (2,), 2, 2, 2)
|
||
|
|
self.check_args(1, (1,), '=i', (4,), 4, 4, 4)
|
||
|
|
self.check_args(1, (1,), '=I', (4,), 4, 4, 4)
|
||
|
|
self.check_args(1, (1,), '=l', (4,), 4, 4, 4)
|
||
|
|
self.check_args(1, (1,), '=L', (4,), 4, 4, 4)
|
||
|
|
self.check_args(1, (1,), '=q', (8,), 8, 8, 8)
|
||
|
|
self.check_args(1, (1,), '=Q', (8,), 8, 8, 8)
|
||
|
|
self.check_args(1, (1,), '=?', (1,), 1, 1, 1)
|
||
|
|
self.check_args(1, (1,), '<h', (2,), 2, 2, 2)
|
||
|
|
self.check_args(1, (1,), '>h', (2,), 2, 2, 2)
|
||
|
|
self.check_args(1, (1,), '!h', (2,), 2, 2, 2)
|
||
|
|
self.check_args(1, (1,), '<q', (8,), 8, 8, 8)
|
||
|
|
self.check_args(1, (1,), '>q', (8,), 8, 8, 8)
|
||
|
|
self.check_args(1, (1,), '!q', (8,), 8, 8, 8)
|
||
|
|
self.check_args(1, (1,), '1x', (1,), 1, 1, 1)
|
||
|
|
self.check_args(1, (1,), '2x', (2,), 2, 2, 2)
|
||
|
|
self.check_args(1, (1,), '3x', (3,), 3, 3, 3)
|
||
|
|
self.check_args(1, (1,), '4x', (4,), 4, 4, 4)
|
||
|
|
self.check_args(1, (1,), '5x', (5,), 5, 5, 5)
|
||
|
|
self.check_args(1, (1,), '6x', (6,), 6, 6, 6)
|
||
|
|
self.check_args(1, (1,), '7x', (7,), 7, 7, 7)
|
||
|
|
self.check_args(1, (1,), '8x', (8,), 8, 8, 8)
|
||
|
|
self.check_args(1, (1,), '9x', (9,), 9, 9, 9)
|
||
|
|
self.check_args(1, (1,), '1h', (2,), 2, 2, 2)
|
||
|
|
self.check_args(1, (1,), '=1h', (2,), 2, 2, 2)
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), 'W')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '^Q')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '=W')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '=f')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '=d')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '<f')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '<d')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '>f')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '>d')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '!f')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '!d')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '0x')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), '11x')
|
||
|
|
self.assertRaises(ValueError, Exporter, (2, 1), 'BB')
|
||
|
|
|
||
|
|
def test_strides(self):
|
||
|
|
self.check_args(1, (10,), '=h', (2,), 20, 20, 2)
|
||
|
|
self.check_args(1, (5, 3), '=h', (6, 2), 30, 30, 2)
|
||
|
|
self.check_args(1, (7, 3, 5), '=h', (30, 10, 2), 210, 210, 2)
|
||
|
|
self.check_args(1, (13, 5, 11, 3), '=h', (330, 66, 6, 2), 4290, 4290, 2)
|
||
|
|
self.check_args(3, (7, 3, 5), '=h', (2, 14, 42), 210, 210, 2)
|
||
|
|
self.check_args(3, (7, 3, 5), '=h', (2, 16, 48), 210, 240, 2)
|
||
|
|
self.check_args(3, (13, 5, 11, 3), '=h', (440, 88, 8, 2), 4290, 5720, 2)
|
||
|
|
self.check_args(3, (7, 5), '3x', (15, 3), 105, 105, 3)
|
||
|
|
self.check_args(3, (7, 5), '3x', (3, 21), 105, 105, 3)
|
||
|
|
self.check_args(3, (7, 5), '3x', (3, 24), 105, 120, 3)
|
||
|
|
|
||
|
|
def test_readonly(self):
|
||
|
|
a = Exporter((2,), 'h', readonly=True)
|
||
|
|
self.assertTrue(a.readonly)
|
||
|
|
b = Importer(a, PyBUF_STRIDED_RO)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_STRIDED)
|
||
|
|
b = Importer(a, PyBUF_STRIDED_RO)
|
||
|
|
|
||
|
|
def test_is_contiguous(self):
|
||
|
|
a = Exporter((10,), '=h')
|
||
|
|
self.assertTrue(a.is_contiguous('C'))
|
||
|
|
self.assertTrue(a.is_contiguous('F'))
|
||
|
|
self.assertTrue(a.is_contiguous('A'))
|
||
|
|
a = Exporter((10, 4), '=h')
|
||
|
|
self.assertTrue(a.is_contiguous('C'))
|
||
|
|
self.assertTrue(a.is_contiguous('A'))
|
||
|
|
self.assertFalse(a.is_contiguous('F'))
|
||
|
|
a = Exporter((13, 5, 11, 3), '=h', (330, 66, 6, 2))
|
||
|
|
self.assertTrue(a.is_contiguous('C'))
|
||
|
|
self.assertTrue(a.is_contiguous('A'))
|
||
|
|
self.assertFalse(a.is_contiguous('F'))
|
||
|
|
a = Exporter((10, 4), '=h', (2, 20))
|
||
|
|
self.assertTrue(a.is_contiguous('F'))
|
||
|
|
self.assertTrue(a.is_contiguous('A'))
|
||
|
|
self.assertFalse(a.is_contiguous('C'))
|
||
|
|
a = Exporter((13, 5, 11, 3), '=h', (2, 26, 130, 1430))
|
||
|
|
self.assertTrue(a.is_contiguous('F'))
|
||
|
|
self.assertTrue(a.is_contiguous('A'))
|
||
|
|
self.assertFalse(a.is_contiguous('C'))
|
||
|
|
a = Exporter((2, 11, 6, 4), '=h', (576, 48, 8, 2))
|
||
|
|
self.assertFalse(a.is_contiguous('A'))
|
||
|
|
a = Exporter((2, 11, 6, 4), '=h', (2, 4, 48, 288))
|
||
|
|
self.assertFalse(a.is_contiguous('A'))
|
||
|
|
a = Exporter((3, 2, 2), '=h', (16, 8, 4))
|
||
|
|
self.assertFalse(a.is_contiguous('A'))
|
||
|
|
a = Exporter((3, 2, 2), '=h', (4, 12, 24))
|
||
|
|
self.assertFalse(a.is_contiguous('A'))
|
||
|
|
|
||
|
|
def test_PyBUF_flags(self):
|
||
|
|
a = Exporter((10, 2), 'd')
|
||
|
|
b = Importer(a, PyBUF_SIMPLE)
|
||
|
|
self.assertTrue(b.obj is a)
|
||
|
|
self.assertTrue(b.format is None)
|
||
|
|
self.assertEqual(b.len, a.len)
|
||
|
|
self.assertEqual(b.itemsize, a.itemsize)
|
||
|
|
self.assertTrue(b.shape is None)
|
||
|
|
self.assertTrue(b.strides is None)
|
||
|
|
self.assertTrue(b.suboffsets is None)
|
||
|
|
self.assertTrue(b.internal is None)
|
||
|
|
self.assertFalse(b.readonly)
|
||
|
|
b = Importer(a, PyBUF_WRITABLE)
|
||
|
|
self.assertTrue(b.obj is a)
|
||
|
|
self.assertTrue(b.format is None)
|
||
|
|
self.assertEqual(b.len, a.len)
|
||
|
|
self.assertEqual(b.itemsize, a.itemsize)
|
||
|
|
self.assertTrue(b.shape is None)
|
||
|
|
self.assertTrue(b.strides is None)
|
||
|
|
self.assertTrue(b.suboffsets is None)
|
||
|
|
self.assertTrue(b.internal is None)
|
||
|
|
self.assertFalse(b.readonly)
|
||
|
|
b = Importer(a, PyBUF_ND)
|
||
|
|
self.assertTrue(b.obj is a)
|
||
|
|
self.assertTrue(b.format is None)
|
||
|
|
self.assertEqual(b.len, a.len)
|
||
|
|
self.assertEqual(b.itemsize, a.itemsize)
|
||
|
|
self.assertEqual(b.shape, a.shape)
|
||
|
|
self.assertTrue(b.strides is None)
|
||
|
|
self.assertTrue(b.suboffsets is None)
|
||
|
|
self.assertTrue(b.internal is None)
|
||
|
|
self.assertFalse(b.readonly)
|
||
|
|
a = Exporter((5, 10), '=h', (24, 2))
|
||
|
|
b = Importer(a, PyBUF_STRIDES)
|
||
|
|
self.assertTrue(b.obj is a)
|
||
|
|
self.assertTrue(b.format is None)
|
||
|
|
self.assertEqual(b.len, a.len)
|
||
|
|
self.assertEqual(b.itemsize, a.itemsize)
|
||
|
|
self.assertEqual(b.shape, a.shape)
|
||
|
|
self.assertEqual(b.strides, a.strides)
|
||
|
|
self.assertTrue(b.suboffsets is None)
|
||
|
|
self.assertTrue(b.internal is None)
|
||
|
|
self.assertFalse(b.readonly)
|
||
|
|
b = Importer(a, PyBUF_FULL)
|
||
|
|
self.assertTrue(b.obj is a)
|
||
|
|
self.assertEqual(b.format, '=h')
|
||
|
|
self.assertEqual(b.len, a.len)
|
||
|
|
self.assertEqual(b.itemsize, a.itemsize)
|
||
|
|
self.assertEqual(b.shape, a.shape)
|
||
|
|
self.assertEqual(b.strides, a.strides)
|
||
|
|
self.assertTrue(b.suboffsets is None)
|
||
|
|
self.assertTrue(b.internal is None)
|
||
|
|
self.assertFalse(b.readonly)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_SIMPLE)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_WRITABLE)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_ND)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_C_CONTIGUOUS)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_F_CONTIGUOUS)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_ANY_CONTIGUOUS)
|
||
|
|
self.assertRaises(BufferError, Importer, a, PyBUF_CONTIG)
|
||
|
|
|
||
|
|
def test_negative_strides(self):
|
||
|
|
self.check_args(3, (3, 5, 4), 'B', (20, 4, -1), 60, 60, 1, 3)
|
||
|
|
self.check_args(3, (3, 5, 3), 'B', (20, 4, -1), 45, 60, 1, 2)
|
||
|
|
self.check_args(3, (3, 5, 4), 'B', (20, -4, 1), 60, 60, 1, 16)
|
||
|
|
self.check_args(3, (3, 5, 4), 'B', (-20, -4, -1), 60, 60, 1, 59)
|
||
|
|
self.check_args(3, (3, 5, 3), 'B', (-20, -4, -1), 45, 60, 1, 58)
|
||
|
|
|
||
|
|
def test_attributes(self):
|
||
|
|
a = Exporter((13, 5, 11, 3), '=h', (440, 88, 8, 2))
|
||
|
|
self.assertEqual(a.ndim, 4)
|
||
|
|
self.assertEqual(a.itemsize, 2)
|
||
|
|
self.assertFalse(a.readonly)
|
||
|
|
self.assertEqual(a.shape, (13, 5, 11, 3))
|
||
|
|
self.assertEqual(a.format, '=h')
|
||
|
|
self.assertEqual(a.strides, (440, 88, 8, 2))
|
||
|
|
self.assertEqual(a.len, 4290)
|
||
|
|
self.assertEqual(a.buflen, 5720)
|
||
|
|
self.assertEqual(a.buf, ctypes.addressof(a._buf))
|
||
|
|
a = Exporter((8,))
|
||
|
|
self.assertEqual(a.ndim, 1)
|
||
|
|
self.assertEqual(a.itemsize, 1)
|
||
|
|
self.assertFalse(a.readonly)
|
||
|
|
self.assertEqual(a.shape, (8,))
|
||
|
|
self.assertEqual(a.format, 'B')
|
||
|
|
self.assertTrue(isinstance(a.strides, tuple))
|
||
|
|
self.assertEqual(a.strides, (1,))
|
||
|
|
self.assertEqual(a.len, 8)
|
||
|
|
self.assertEqual(a.buflen, 8)
|
||
|
|
a = Exporter([13, 5, 11, 3], '=h', [440, 88, 8, 2])
|
||
|
|
self.assertTrue(isinstance(a.shape, tuple))
|
||
|
|
self.assertTrue(isinstance(a.strides, tuple))
|
||
|
|
self.assertEqual(a.shape, (13, 5, 11, 3))
|
||
|
|
self.assertEqual(a.strides, (440, 88, 8, 2))
|
||
|
|
|
||
|
|
def test_itemsize(self):
|
||
|
|
exp = Exporter((4, 5), format='B', itemsize=8)
|
||
|
|
imp = Importer(exp, PyBUF_RECORDS)
|
||
|
|
self.assertEqual(imp.itemsize, 8)
|
||
|
|
self.assertEqual(imp.format, 'B')
|
||
|
|
self.assertEqual(imp.strides, (40, 8))
|
||
|
|
exp = Exporter((4, 5), format='weird', itemsize=5)
|
||
|
|
imp = Importer(exp, PyBUF_RECORDS)
|
||
|
|
self.assertEqual(imp.itemsize, 5)
|
||
|
|
self.assertEqual(imp.format, 'weird')
|
||
|
|
self.assertEqual(imp.strides, (25, 5))
|
||
|
|
|
||
|
|
def check_args(self, call_flags,
|
||
|
|
shape, format, strides, length, bufsize, itemsize,
|
||
|
|
offset=0):
|
||
|
|
format_arg = format if call_flags & 1 else None
|
||
|
|
strides_arg = strides if call_flags & 2 else None
|
||
|
|
a = Exporter(shape, format_arg, strides_arg)
|
||
|
|
self.assertEqual(a.buflen, bufsize)
|
||
|
|
self.assertEqual(a.buf, ctypes.addressof(a._buf) + offset)
|
||
|
|
m = Importer(a, PyBUF_RECORDS_RO)
|
||
|
|
self.assertEqual(m.buf, a.buf)
|
||
|
|
self.assertEqual(m.len, length)
|
||
|
|
self.assertEqual(m.format, format)
|
||
|
|
self.assertEqual(m.itemsize, itemsize)
|
||
|
|
self.assertEqual(m.shape, shape)
|
||
|
|
self.assertEqual(m.strides, strides)
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
unittest.main()
|