ÿØÿàJFIFÿþ ÿÛC       ÿÛC ÿÀÿÄÿÄ"#QrÿÄÿÄ&1!A"2qQaáÿÚ ?Øy,æ/3JæݹÈ߲؋5êXw²±ÉyˆR”¾I0ó2—PI¾IÌÚiMö¯–þrìN&"KgX:Šíµ•nTJnLK„…@!‰-ý ùúmë;ºgµŒ&ó±hw’¯Õ@”Ü— 9ñ-ë.²1<yà‚¹ïQÐU„ہ?.’¦èûbß±©Ö«Âw*VŒ) `$‰bØԟ’ëXÖ-ËTÜíGÚ3ð«g Ÿ§¯—Jx„–’U/ÂÅv_s(Hÿ@TñJÑãõçn­‚!ÈgfbÓc­:él[ðQe 9ÀPLbÃãCµm[5¿ç'ªjglå‡Ûí_§Úõl-;"PkÞÞÁQâ¼_Ñ^¢SŸx?"¸¦ùY騐ÒOÈ q’`~~ÚtËU¹CڒêV  I1Áß_ÿÙfrom cpython cimport PyBytes_AsString #from cpython cimport PyByteArray_AsString # cython still not exports that cdef extern from "Python.h": char* PyByteArray_AsString(bytearray ba) except NULL from libc.stdint cimport uint32_t, uint64_t, uintmax_t def _websocket_mask_cython(object mask, object data): """Note, this function mutates its `data` argument """ cdef: Py_ssize_t data_len, i # bit operations on signed integers are implementation-specific unsigned char * in_buf const unsigned char * mask_buf uint32_t uint32_msk uint64_t uint64_msk assert len(mask) == 4 if not isinstance(mask, bytes): mask = bytes(mask) if isinstance(data, bytearray): data = data else: data = bytearray(data) data_len = len(data) in_buf = PyByteArray_AsString(data) mask_buf = PyBytes_AsString(mask) uint32_msk = (mask_buf)[0] # TODO: align in_data ptr to achieve even faster speeds # does it need in python ?! malloc() always aligns to sizeof(long) bytes if sizeof(size_t) >= 8: uint64_msk = uint32_msk uint64_msk = (uint64_msk << 32) | uint32_msk while data_len >= 8: (in_buf)[0] ^= uint64_msk in_buf += 8 data_len -= 8 while data_len >= 4: (in_buf)[0] ^= uint32_msk in_buf += 4 data_len -= 4 for i in range(0, data_len): in_buf[i] ^= mask_buf[i]