import sys from rpython.rlib.objectmodel import specialize, we_are_translated, enforceargs from rpython.rlib.rstring import StringBuilder, UnicodeBuilder from rpython.rlib.rarithmetic import r_uint, intmask, widen from rpython.rlib.unicodedata import unicodedb from rpython.tool.sourcetools import func_with_new_name from rpython.rtyper.lltypesystem import lltype, rffi from rpython.rlib import jit, nonconst if rffi.sizeof(lltype.UniChar) == 4: MAXUNICODE = 0x10ffff allow_surrogate_by_default = False else: MAXUNICODE = 0xffff allow_surrogate_by_default = True BYTEORDER = sys.byteorder BYTEORDER2 = BYTEORDER[0] + 'e' # either "le" or "be" assert BYTEORDER2 in ('le', 'be') # python 2.7 has a preview of py3k behavior, so those functions # are used either when we're testing wide pypy on narrow cpython # or in unicodedata in pypy def unichr_returns_surrogate(c): if c <= 0xffff or c > 0x10ffff: return unichr(c) else: c -= 0x10000 return (unichr(0xD800 + (c >> 10)) + unichr(0xDC00 + (c & 0x03FF))) def ord_accepts_surrogate(u): if isinstance(u, unicode) and len(u) == 2: ch1 = ord(u[0]) ch2 = ord(u[1]) if 0xD800 <= ch1 <= 0xDBFF and 0xDC00 <= ch2 <= 0xDFFF: return (((ch1 - 0xD800) << 10) | (ch2 - 0xDC00)) + 0x10000 if not we_are_translated(): return ord(u) else: if len(u) == 1: return ord(u[0]) raise TypeError if MAXUNICODE > sys.maxunicode: # A version of unichr which allows codes outside the BMP # even on narrow unicode builds. # It will be used when interpreting code on top of a UCS2 CPython, # when sizeof(wchar_t) == 4. # Note that Python3 uses a similar implementation. def UNICHR(c): assert not we_are_translated() return unichr_returns_surrogate(c) UNICHR._flowspace_rewrite_directly_as_ = unichr # ^^^ NB.: for translation, it's essential to use this hack instead # of calling unichr() from UNICHR(), because unichr() detects if there # is a "try:except ValueError" immediately around it. def ORD(u): assert not we_are_translated() return ord_accepts_surrogate(u) ORD._flowspace_rewrite_directly_as_ = ord else: UNICHR = unichr ORD = ord if MAXUNICODE > 0xFFFF: def code_to_unichr(code): if is_narrow_host(): # Host CPython is narrow build, generate surrogates return unichr_returns_surrogate(code) else: return unichr(code) else: def code_to_unichr(code): # generate surrogates for large codes return unichr_returns_surrogate(widen(code)) def _STORECHAR(result, CH, byteorder): hi = chr(((CH) >> 8) & 0xff) lo = chr((CH) & 0xff) if byteorder == 'little': result.append(lo) result.append(hi) else: result.append(hi) result.append(lo) def is_narrow_host(): return not we_are_translated() and sys.maxunicode == 0xFFFF def default_unicode_error_decode(errors, encoding, msg, s, startingpos, endingpos): if errors == 'replace': return u'\ufffd', endingpos if errors == 'ignore': return u'', endingpos raise UnicodeDecodeError(encoding, s, startingpos, endingpos, msg) def default_unicode_error_encode(errors, encoding, msg, u, startingpos, endingpos): if errors == 'replace': return u'?', None, endingpos if errors == 'ignore': return u'', None, endingpos raise UnicodeEncodeError(encoding, u, startingpos, endingpos, msg) # ____________________________________________________________ # utf-8 _utf8_code_length = ''.join(map(chr, [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, # 80-8F 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, # B0-BF 0, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, # C0-C1 + C2-CF 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, # D0-DF 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, # E0-EF 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 # F0-F4 - F5-FF ])) # if you can't use the @elidable version, call str_decode_utf_8_impl() # directly @jit.elidable def str_decode_utf_8(s, size, errors, final=False, errorhandler=None, allow_surrogates=allow_surrogate_by_default): if errorhandler is None: errorhandler = default_unicode_error_decode return str_decode_utf_8_elidable(s, size, errors, final, errorhandler, allow_surrogates=allow_surrogates) def _invalid_cont_byte(ordch): return ordch>>6 != 0x2 # 0b10 _invalid_byte_2_of_2 = _invalid_cont_byte _invalid_byte_3_of_3 = _invalid_cont_byte _invalid_byte_3_of_4 = _invalid_cont_byte _invalid_byte_4_of_4 = _invalid_cont_byte @enforceargs(allow_surrogates=bool) def _invalid_byte_2_of_3(ordch1, ordch2, allow_surrogates): return (ordch2>>6 != 0x2 or # 0b10 (ordch1 == 0xe0 and ordch2 < 0xa0) # surrogates shouldn't be valid UTF-8! or (ordch1 == 0xed and ordch2 > 0x9f and not allow_surrogates)) def _invalid_byte_2_of_4(ordch1, ordch2): return (ordch2>>6 != 0x2 or # 0b10 (ordch1 == 0xf0 and ordch2 < 0x90) or (ordch1 == 0xf4 and ordch2 > 0x8f)) # NOTE: this is a slightly fixed algorithm when compared with # CPython2's. It is closer to CPython3's. See comments in # test_invalid_cb_for_3bytes_seq(). def str_decode_utf_8_impl(s, size, errors, final, errorhandler, allow_surrogates): if size == 0: return u'', 0 result = UnicodeBuilder(size) pos = 0 while pos < size: ordch1 = ord(s[pos]) # fast path for ASCII # XXX maybe use a while loop here if ordch1 < 0x80: result.append(unichr(ordch1)) pos += 1 continue n = ord(_utf8_code_length[ordch1 - 0x80]) if pos + n > size: if not final: break # argh, this obscure block of code is mostly a copy of # what follows :-( charsleft = size - pos - 1 # either 0, 1, 2 # note: when we get the 'unexpected end of data' we need # to care about the pos returned; it can be lower than size, # in case we need to continue running this loop if not charsleft: # there's only the start byte and nothing else r, pos = errorhandler(errors, 'utf8', 'unexpected end of data', s, pos, pos+1) result.append(r) continue ordch2 = ord(s[pos+1]) if n == 3: # 3-bytes seq with only a continuation byte if _invalid_byte_2_of_3(ordch1, ordch2, allow_surrogates): # second byte invalid, take the first and continue r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+1) result.append(r) continue else: # second byte valid, but third byte missing r, pos = errorhandler(errors, 'utf8', 'unexpected end of data', s, pos, pos+2) result.append(r) continue elif n == 4: # 4-bytes seq with 1 or 2 continuation bytes if _invalid_byte_2_of_4(ordch1, ordch2): # second byte invalid, take the first and continue r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+1) result.append(r) continue elif charsleft == 2 and _invalid_byte_3_of_4(ord(s[pos+2])): # third byte invalid, take the first two and continue r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+2) result.append(r) continue else: # there's only 1 or 2 valid cb, but the others are missing r, pos = errorhandler(errors, 'utf8', 'unexpected end of data', s, pos, pos+charsleft+1) result.append(r) continue raise AssertionError("unreachable") if n == 0: r, pos = errorhandler(errors, 'utf8', 'invalid start byte', s, pos, pos+1) result.append(r) elif n == 1: assert 0, "ascii should have gone through the fast path" elif n == 2: ordch2 = ord(s[pos+1]) if _invalid_byte_2_of_2(ordch2): r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+1) result.append(r) continue # 110yyyyy 10zzzzzz -> 00000000 00000yyy yyzzzzzz result.append(unichr(((ordch1 & 0x1F) << 6) + # 0b00011111 (ordch2 & 0x3F))) # 0b00111111 pos += 2 elif n == 3: ordch2 = ord(s[pos+1]) ordch3 = ord(s[pos+2]) if _invalid_byte_2_of_3(ordch1, ordch2, allow_surrogates): r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+1) result.append(r) continue elif _invalid_byte_3_of_3(ordch3): r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+2) result.append(r) continue # 1110xxxx 10yyyyyy 10zzzzzz -> 00000000 xxxxyyyy yyzzzzzz result.append(unichr(((ordch1 & 0x0F) << 12) + # 0b00001111 ((ordch2 & 0x3F) << 6) + # 0b00111111 (ordch3 & 0x3F))) # 0b00111111 pos += 3 elif n == 4: ordch2 = ord(s[pos+1]) ordch3 = ord(s[pos+2]) ordch4 = ord(s[pos+3]) if _invalid_byte_2_of_4(ordch1, ordch2): r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+1) result.append(r) continue elif _invalid_byte_3_of_4(ordch3): r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+2) result.append(r) continue elif _invalid_byte_4_of_4(ordch4): r, pos = errorhandler(errors, 'utf8', 'invalid continuation byte', s, pos, pos+3) result.append(r) continue # 11110www 10xxxxxx 10yyyyyy 10zzzzzz -> 000wwwxx xxxxyyyy yyzzzzzz c = (((ordch1 & 0x07) << 18) + # 0b00000111 ((ordch2 & 0x3F) << 12) + # 0b00111111 ((ordch3 & 0x3F) << 6) + # 0b00111111 (ordch4 & 0x3F)) # 0b00111111 if c <= MAXUNICODE: result.append(UNICHR(c)) else: # compute and append the two surrogates: # translate from 10000..10FFFF to 0..FFFF c -= 0x10000 # high surrogate = top 10 bits added to D800 result.append(unichr(0xD800 + (c >> 10))) # low surrogate = bottom 10 bits added to DC00 result.append(unichr(0xDC00 + (c & 0x03FF))) pos += 4 return result.build(), pos str_decode_utf_8_elidable = jit.elidable( func_with_new_name(str_decode_utf_8_impl, "str_decode_utf_8_elidable")) def _encodeUCS4(result, ch): # Encode UCS4 Unicode ordinals result.append((chr((0xf0 | (ch >> 18))))) result.append((chr((0x80 | ((ch >> 12) & 0x3f))))) result.append((chr((0x80 | ((ch >> 6) & 0x3f))))) result.append((chr((0x80 | (ch & 0x3f))))) # if you can't use the @elidable version, call unicode_encode_utf_8_impl() # directly @jit.elidable def unicode_encode_utf_8(s, size, errors, errorhandler=None, allow_surrogates=allow_surrogate_by_default): # In this function, allow_surrogates can be: # # * True: surrogates are always allowed. A valid surrogate pair # is replaced with the non-BMP unicode char it stands for, # which is then encoded as 4 bytes. # # * False: surrogates are always forbidden. # # See also unicode_encode_utf8sp(). # if errorhandler is None: errorhandler = default_unicode_error_encode return unicode_encode_utf_8_elidable(s, size, errors, errorhandler, allow_surrogates=allow_surrogates) def unicode_encode_utf_8_impl(s, size, errors, errorhandler, allow_surrogates=False): assert(size >= 0) result = StringBuilder(size) pos = 0 while pos < size: ch = ord(s[pos]) pos += 1 if ch < 0x80: # Encode ASCII result.append(chr(ch)) elif ch < 0x0800: # Encode Latin-1 result.append(chr((0xc0 | (ch >> 6)))) result.append(chr((0x80 | (ch & 0x3f)))) else: # Encode UCS2 Unicode ordinals if ch < 0x10000: # Special case: check for high surrogate if 0xD800 <= ch <= 0xDFFF: if pos != size: ch2 = ord(s[pos]) # Check for low surrogate and combine the two to # form a UCS4 value if ((allow_surrogates or MAXUNICODE < 65536 or is_narrow_host()) and ch <= 0xDBFF and 0xDC00 <= ch2 <= 0xDFFF): ch3 = ((ch - 0xD800) << 10 | (ch2 - 0xDC00)) + 0x10000 assert ch3 >= 0 pos += 1 _encodeUCS4(result, ch3) continue # note: if the program only ever calls this with # allow_surrogates=True, then we'll never annotate # the following block of code, and errorhandler() # will never be called. This causes RPython # problems. Avoid it with the nonconst hack. if not allow_surrogates or nonconst.NonConstant(False): ru, rs, pos = errorhandler(errors, 'utf8', 'surrogates not allowed', s, pos-1, pos) if rs is not None: # py3k only result.append(rs) continue for ch in ru: if ord(ch) < 0x80: result.append(chr(ord(ch))) else: errorhandler('strict', 'utf8', 'surrogates not allowed', s, pos-1, pos) continue # else: Fall through and handles isolated high surrogates result.append((chr((0xe0 | (ch >> 12))))) result.append((chr((0x80 | ((ch >> 6) & 0x3f))))) result.append((chr((0x80 | (ch & 0x3f))))) else: _encodeUCS4(result, ch) return result.build() unicode_encode_utf_8_elidable = jit.elidable( func_with_new_name(unicode_encode_utf_8_impl, "unicode_encode_utf_8_elidable")) def unicode_encode_utf8sp(s, size): # Surrogate-preserving utf-8 encoding. Any surrogate character # turns into its 3-bytes encoding, whether it is paired or not. # This should always be reversible, and the reverse is the regular # str_decode_utf_8() with allow_surrogates=True. assert(size >= 0) result = StringBuilder(size) pos = 0 while pos < size: ch = ord(s[pos]) pos += 1 if ch < 0x80: # Encode ASCII result.append(chr(ch)) elif ch < 0x0800: # Encode Latin-1 result.append(chr((0xc0 | (ch >> 6)))) result.append(chr((0x80 | (ch & 0x3f)))) elif ch < 0x10000: # Encode UCS2 Unicode ordinals, and surrogates result.append((chr((0xe0 | (ch >> 12))))) result.append((chr((0x80 | ((ch >> 6) & 0x3f))))) result.append((chr((0x80 | (ch & 0x3f))))) else: _encodeUCS4(result, ch) return result.build() class SurrogateError(Exception): def __init__(self, char, index): self.char = char self.index = index def unicode_encode_utf8_forbid_surrogates(s, size): # Strict surrogate-forbidding utf-8 encoding. Any surrogate character # raises an interp-level SurrogateError, even on 16-bit hosts. # --- XXX check in detail what occurs on 16-bit hosts in PyPy 3 --- assert(size >= 0) result = StringBuilder(size) pos = 0 while pos < size: ch = ord(s[pos]) pos += 1 if ch < 0x80: # Encode ASCII result.append(chr(ch)) elif ch < 0x0800: # Encode Latin-1 result.append(chr((0xc0 | (ch >> 6)))) result.append(chr((0x80 | (ch & 0x3f)))) elif ch < 0x10000: if 0xD800 <= ch <= 0xDFFF: raise SurrogateError(ch, pos) # Encode UCS2 Unicode ordinals result.append((chr((0xe0 | (ch >> 12))))) result.append((chr((0x80 | ((ch >> 6) & 0x3f))))) result.append((chr((0x80 | (ch & 0x3f))))) else: _encodeUCS4(result, ch) return result.build() # ____________________________________________________________ # utf-16 def str_decode_utf_16(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_16_helper(s, size, errors, final, errorhandler, "native") return result, length def str_decode_utf_16_be(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_16_helper(s, size, errors, final, errorhandler, "big") return result, length def str_decode_utf_16_le(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_16_helper(s, size, errors, final, errorhandler, "little") return result, length def py3k_str_decode_utf_16(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_16_helper(s, size, errors, final, errorhandler, "native", 'utf-16-' + BYTEORDER2) return result, length def py3k_str_decode_utf_16_be(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_16_helper(s, size, errors, final, errorhandler, "big", 'utf-16-be') return result, length def py3k_str_decode_utf_16_le(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_16_helper(s, size, errors, final, errorhandler, "little", 'utf-16-le') return result, length def str_decode_utf_16_helper(s, size, errors, final=True, errorhandler=None, byteorder="native", public_encoding_name='utf16'): if errorhandler is None: errorhandler = default_unicode_error_decode bo = 0 if BYTEORDER == 'little': ihi = 1 ilo = 0 else: ihi = 0 ilo = 1 # Check for BOM marks (U+FEFF) in the input and adjust current # byte order setting accordingly. In native mode, the leading BOM # mark is skipped, in all other modes, it is copied to the output # stream as-is (giving a ZWNBSP character). pos = 0 if byteorder == 'native': if size >= 2: bom = (ord(s[ihi]) << 8) | ord(s[ilo]) if BYTEORDER == 'little': if bom == 0xFEFF: pos += 2 bo = -1 elif bom == 0xFFFE: pos += 2 bo = 1 else: if bom == 0xFEFF: pos += 2 bo = 1 elif bom == 0xFFFE: pos += 2 bo = -1 elif byteorder == 'little': bo = -1 else: bo = 1 if size == 0: return u'', 0, bo if bo == -1: # force little endian ihi = 1 ilo = 0 elif bo == 1: # force big endian ihi = 0 ilo = 1 result = UnicodeBuilder(size // 2) #XXX I think the errors are not correctly handled here while pos < size: # remaining bytes at the end? (size should be even) if len(s) - pos < 2: if not final: break r, pos = errorhandler(errors, public_encoding_name, "truncated data", s, pos, len(s)) result.append(r) if len(s) - pos < 2: break ch = (ord(s[pos + ihi]) << 8) | ord(s[pos + ilo]) pos += 2 if ch < 0xD800 or ch > 0xDFFF: result.append(unichr(ch)) continue # UTF-16 code pair: if len(s) - pos < 2: pos -= 2 if not final: break errmsg = "unexpected end of data" r, pos = errorhandler(errors, public_encoding_name, errmsg, s, pos, len(s)) result.append(r) if len(s) - pos < 2: break elif 0xD800 <= ch <= 0xDBFF: ch2 = (ord(s[pos+ihi]) << 8) | ord(s[pos+ilo]) pos += 2 if 0xDC00 <= ch2 <= 0xDFFF: if MAXUNICODE < 65536: result.append(unichr(ch)) result.append(unichr(ch2)) else: result.append(UNICHR((((ch & 0x3FF)<<10) | (ch2 & 0x3FF)) + 0x10000)) continue else: r, pos = errorhandler(errors, public_encoding_name, "illegal UTF-16 surrogate", s, pos - 4, pos - 2) result.append(r) else: r, pos = errorhandler(errors, public_encoding_name, "illegal encoding", s, pos - 2, pos) result.append(r) return result.build(), pos, bo def unicode_encode_utf_16_helper(s, size, errors, errorhandler=None, allow_surrogates=True, byteorder='little', public_encoding_name='utf16'): if errorhandler is None: errorhandler = default_unicode_error_encode if size == 0: if byteorder == 'native': result = StringBuilder(2) _STORECHAR(result, 0xFEFF, BYTEORDER) return result.build() return "" result = StringBuilder(size * 2 + 2) if byteorder == 'native': _STORECHAR(result, 0xFEFF, BYTEORDER) byteorder = BYTEORDER pos = 0 while pos < size: ch = ord(s[pos]) pos += 1 if ch < 0xD800: _STORECHAR(result, ch, byteorder) elif ch >= 0x10000: _STORECHAR(result, 0xD800 | ((ch-0x10000) >> 10), byteorder) _STORECHAR(result, 0xDC00 | ((ch-0x10000) & 0x3FF), byteorder) elif ch >= 0xE000 or allow_surrogates: _STORECHAR(result, ch, byteorder) else: ru, rs, pos = errorhandler(errors, public_encoding_name, 'surrogates not allowed', s, pos-1, pos) if rs is not None: # py3k only if len(rs) % 2 != 0: errorhandler('strict', public_encoding_name, 'surrogates not allowed', s, pos-1, pos) result.append(rs) continue for ch in ru: if ord(ch) < 0xD800: _STORECHAR(result, ord(ch), byteorder) else: errorhandler('strict', public_encoding_name, 'surrogates not allowed', s, pos-1, pos) continue return result.build() def unicode_encode_utf_16(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_16_helper(s, size, errors, errorhandler, allow_surrogates, "native") def unicode_encode_utf_16_be(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_16_helper(s, size, errors, errorhandler, allow_surrogates, "big") def unicode_encode_utf_16_le(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_16_helper(s, size, errors, errorhandler, allow_surrogates, "little") def py3k_unicode_encode_utf_16(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_16_helper(s, size, errors, errorhandler, allow_surrogates, "native", 'utf-16-' + BYTEORDER2) def py3k_unicode_encode_utf_16_be(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_16_helper(s, size, errors, errorhandler, allow_surrogates, "big", 'utf-16-be') def py3k_unicode_encode_utf_16_le(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_16_helper(s, size, errors, errorhandler, allow_surrogates, "little", 'utf-16-le') # ____________________________________________________________ # utf-32 (not used in PyPy any more) def str_decode_utf_32(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_32_helper( s, size, errors, final, errorhandler, "native") return result, length def str_decode_utf_32_be(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_32_helper( s, size, errors, final, errorhandler, "big") return result, length def str_decode_utf_32_le(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_32_helper( s, size, errors, final, errorhandler, "little") return result, length def py3k_str_decode_utf_32(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_32_helper( s, size, errors, final, errorhandler, "native", 'utf-32-' + BYTEORDER2, allow_surrogates=False) return result, length def py3k_str_decode_utf_32_be(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_32_helper( s, size, errors, final, errorhandler, "big", 'utf-32-be', allow_surrogates=False) return result, length def py3k_str_decode_utf_32_le(s, size, errors, final=True, errorhandler=None): result, length, byteorder = str_decode_utf_32_helper( s, size, errors, final, errorhandler, "little", 'utf-32-le', allow_surrogates=False) return result, length BOM32_DIRECT = intmask(0x0000FEFF) BOM32_REVERSE = intmask(0xFFFE0000) def str_decode_utf_32_helper(s, size, errors, final=True, errorhandler=None, byteorder="native", public_encoding_name='utf32', allow_surrogates=True): if errorhandler is None: errorhandler = default_unicode_error_decode bo = 0 if BYTEORDER == 'little': iorder = [0, 1, 2, 3] else: iorder = [3, 2, 1, 0] # Check for BOM marks (U+FEFF) in the input and adjust current # byte order setting accordingly. In native mode, the leading BOM # mark is skipped, in all other modes, it is copied to the output # stream as-is (giving a ZWNBSP character). pos = 0 if byteorder == 'native': if size >= 4: bom = intmask( (ord(s[iorder[3]]) << 24) | (ord(s[iorder[2]]) << 16) | (ord(s[iorder[1]]) << 8) | ord(s[iorder[0]])) if BYTEORDER == 'little': if bom == BOM32_DIRECT: pos += 4 bo = -1 elif bom == BOM32_REVERSE: pos += 4 bo = 1 else: if bom == BOM32_DIRECT: pos += 4 bo = 1 elif bom == BOM32_REVERSE: pos += 4 bo = -1 elif byteorder == 'little': bo = -1 else: bo = 1 if size == 0: return u'', 0, bo if bo == -1: # force little endian iorder = [0, 1, 2, 3] elif bo == 1: # force big endian iorder = [3, 2, 1, 0] result = UnicodeBuilder(size // 4) while pos < size: # remaining bytes at the end? (size should be divisible by 4) if len(s) - pos < 4: if not final: break r, pos = errorhandler(errors, public_encoding_name, "truncated data", s, pos, len(s)) result.append(r) if len(s) - pos < 4: break continue ch = ((ord(s[pos + iorder[3]]) << 24) | (ord(s[pos + iorder[2]]) << 16) | (ord(s[pos + iorder[1]]) << 8) | ord(s[pos + iorder[0]])) if not allow_surrogates and 0xD800 <= ch <= 0xDFFFF: r, pos = errorhandler(errors, public_encoding_name, "code point in surrogate code point " "range(0xd800, 0xe000)", s, pos, len(s)) result.append(r) elif ch >= 0x110000: r, pos = errorhandler(errors, public_encoding_name, "codepoint not in range(0x110000)", s, pos, len(s)) result.append(r) continue if MAXUNICODE < 65536 and ch >= 0x10000: ch -= 0x10000L result.append(unichr(0xD800 + (ch >> 10))) result.append(unichr(0xDC00 + (ch & 0x03FF))) else: result.append(UNICHR(ch)) pos += 4 return result.build(), pos, bo def _STORECHAR32(result, CH, byteorder): c0 = chr(((CH) >> 24) & 0xff) c1 = chr(((CH) >> 16) & 0xff) c2 = chr(((CH) >> 8) & 0xff) c3 = chr((CH) & 0xff) if byteorder == 'little': result.append(c3) result.append(c2) result.append(c1) result.append(c0) else: result.append(c0) result.append(c1) result.append(c2) result.append(c3) def unicode_encode_utf_32_helper(s, size, errors, errorhandler=None, allow_surrogates=True, byteorder='little', public_encoding_name='utf32'): if errorhandler is None: errorhandler = default_unicode_error_encode if size == 0: if byteorder == 'native': result = StringBuilder(4) _STORECHAR32(result, 0xFEFF, BYTEORDER) return result.build() return "" result = StringBuilder(size * 4 + 4) if byteorder == 'native': _STORECHAR32(result, 0xFEFF, BYTEORDER) byteorder = BYTEORDER pos = 0 while pos < size: ch = ord(s[pos]) pos += 1 ch2 = 0 if not allow_surrogates and 0xD800 <= ch < 0xE000: ru, rs, pos = errorhandler(errors, public_encoding_name, 'surrogates not allowed', s, pos-1, pos) if rs is not None: # py3k only if len(rs) % 4 != 0: errorhandler('strict', public_encoding_name, 'surrogates not allowed', s, pos-1, pos) result.append(rs) continue for ch in ru: if ord(ch) < 0xD800: _STORECHAR32(result, ord(ch), byteorder) else: errorhandler('strict', public_encoding_name, 'surrogates not allowed', s, pos-1, pos) continue if 0xD800 <= ch < 0xDC00 and MAXUNICODE < 65536 and pos < size: ch2 = ord(s[pos]) if 0xDC00 <= ch2 < 0xE000: ch = (((ch & 0x3FF)<<10) | (ch2 & 0x3FF)) + 0x10000; pos += 1 _STORECHAR32(result, ch, byteorder) return result.build() def unicode_encode_utf_32(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_32_helper(s, size, errors, errorhandler, allow_surrogates, "native") def unicode_encode_utf_32_be(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_32_helper(s, size, errors, errorhandler, allow_surrogates, "big") def unicode_encode_utf_32_le(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_32_helper(s, size, errors, errorhandler, allow_surrogates, "little") def py3k_unicode_encode_utf_32(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_32_helper(s, size, errors, errorhandler, allow_surrogates, "native", 'utf-32-' + BYTEORDER2) def py3k_unicode_encode_utf_32_be(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_32_helper(s, size, errors, errorhandler, allow_surrogates, "big", 'utf-32-be') def py3k_unicode_encode_utf_32_le(s, size, errors, errorhandler=None, allow_surrogates=True): return unicode_encode_utf_32_helper(s, size, errors, errorhandler, allow_surrogates, "little", 'utf-32-le') # ____________________________________________________________ # utf-7 # Three simple macros defining base-64 def _utf7_IS_BASE64(oc): "Is c a base-64 character?" c = chr(oc) return c.isalnum() or c == '+' or c == '/' def _utf7_TO_BASE64(n): "Returns the base-64 character of the bottom 6 bits of n" return "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"[n & 0x3f] def _utf7_FROM_BASE64(c): "given that c is a base-64 character, what is its base-64 value?" if c >= 'a': return ord(c) - 71 elif c >= 'A': return ord(c) - 65 elif c >= '0': return ord(c) + 4 elif c == '+': return 62 else: # c == '/' return 63 def _utf7_DECODE_DIRECT(oc): return oc <= 127 and oc != ord('+') # The UTF-7 encoder treats ASCII characters differently according to # whether they are Set D, Set O, Whitespace, or special (i.e. none of # the above). See RFC2152. This array identifies these different # sets: # 0 : "Set D" # alphanumeric and '(),-./:? # 1 : "Set O" # !"#$%&*;<=>@[]^_`{|} # 2 : "whitespace" # ht nl cr sp # 3 : special (must be base64 encoded) # everything else (i.e. +\~ and non-printing codes 0-8 11-12 14-31 127) utf7_category = [ # nul soh stx etx eot enq ack bel bs ht nl vt np cr so si 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 3, 3, 2, 3, 3, # dle dc1 dc2 dc3 dc4 nak syn etb can em sub esc fs gs rs us 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, # sp ! " # $ % & ' ( ) * + , - . / 2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 3, 0, 0, 0, 0, # 0 1 2 3 4 5 6 7 8 9 : ; < = > ? 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, # @ A B C D E F G H I J K L M N O 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, # P Q R S T U V W X Y Z [ \ ] ^ _ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 1, 1, 1, # ` a b c d e f g h i j k l m n o 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, # p q r s t u v w x y z { | } ~ del 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 3, ] # ENCODE_DIRECT: this character should be encoded as itself. The # answer depends on whether we are encoding set O as itself, and also # on whether we are encoding whitespace as itself. RFC2152 makes it # clear that the answers to these questions vary between # applications, so this code needs to be flexible. def _utf7_ENCODE_DIRECT(oc, directO, directWS): return(oc < 128 and oc > 0 and (utf7_category[oc] == 0 or (directWS and utf7_category[oc] == 2) or (directO and utf7_category[oc] == 1))) def _utf7_ENCODE_CHAR(result, oc, base64bits, base64buffer): if MAXUNICODE > 65535 and oc >= 0x10000: # code first surrogate base64bits += 16 base64buffer = (base64buffer << 16) | 0xd800 | ((oc-0x10000) >> 10) while base64bits >= 6: result.append(_utf7_TO_BASE64(base64buffer >> (base64bits-6))) base64bits -= 6 # prepare second surrogate oc = 0xDC00 | ((oc-0x10000) & 0x3FF) base64bits += 16 base64buffer = (base64buffer << 16) | oc while base64bits >= 6: result.append(_utf7_TO_BASE64(base64buffer >> (base64bits-6))) base64bits -= 6 return base64bits, base64buffer def str_decode_utf_7(s, size, errors, final=False, errorhandler=None): if errorhandler is None: errorhandler = default_unicode_error_decode if size == 0: return u'', 0 inShift = False base64bits = 0 base64buffer = 0 surrogate = 0 result = UnicodeBuilder(size) pos = 0 shiftOutStartPos = 0 startinpos = 0 while pos < size: ch = s[pos] if inShift: # in a base-64 section if _utf7_IS_BASE64(ord(ch)): #consume a base-64 character base64buffer = (base64buffer << 6) | _utf7_FROM_BASE64(ch) base64bits += 6 pos += 1 if base64bits >= 16: # enough bits for a UTF-16 value outCh = base64buffer >> (base64bits - 16) base64bits -= 16 base64buffer &= (1 << base64bits) - 1 # clear high bits assert outCh <= 0xffff if surrogate: # expecting a second surrogate if outCh >= 0xDC00 and outCh <= 0xDFFF: if MAXUNICODE < 65536: result.append(unichr(surrogate)) result.append(unichr(outCh)) else: result.append( UNICHR((((surrogate & 0x3FF)<<10) | (outCh & 0x3FF)) + 0x10000)) surrogate = 0 continue else: result.append(unichr(surrogate)) surrogate = 0 # Not done with outCh: falls back to next line if outCh >= 0xD800 and outCh <= 0xDBFF: # first surrogate surrogate = outCh else: result.append(unichr(outCh)) else: # now leaving a base-64 section inShift = False if base64bits > 0: # left-over bits if base64bits >= 6: # We've seen at least one base-64 character pos += 1 msg = "partial character in shift sequence" res, pos = errorhandler(errors, 'utf7', msg, s, pos-1, pos) result.append(res) continue else: # Some bits remain; they should be zero if base64buffer != 0: pos += 1 msg = "non-zero padding bits in shift sequence" res, pos = errorhandler(errors, 'utf7', msg, s, pos-1, pos) result.append(res) continue if surrogate and _utf7_DECODE_DIRECT(ord(ch)): result.append(unichr(surrogate)) surrogate = 0 if ch == '-': # '-' is absorbed; other terminating characters are # preserved pos += 1 elif ch == '+': startinpos = pos pos += 1 # consume '+' if pos < size and s[pos] == '-': # '+-' encodes '+' pos += 1 result.append(u'+') else: # begin base64-encoded section inShift = 1 surrogate = 0 shiftOutStartPos = result.getlength() base64bits = 0 base64buffer = 0 elif _utf7_DECODE_DIRECT(ord(ch)): # character decodes at itself result.append(unichr(ord(ch))) pos += 1 else: startinpos = pos pos += 1 msg = "unexpected special character" res, pos = errorhandler(errors, 'utf7', msg, s, pos-1, pos) result.append(res) # end of string final_length = result.getlength() if inShift and final: # in shift sequence, no more to follow # if we're in an inconsistent state, that's an error inShift = 0 if (surrogate or base64bits >= 6 or (base64bits > 0 and base64buffer != 0)): msg = "unterminated shift sequence" res, pos = errorhandler(errors, 'utf7', msg, s, shiftOutStartPos, pos) result.append(res) final_length = result.getlength() elif inShift: pos = startinpos final_length = shiftOutStartPos # back off output assert final_length >= 0 return result.build()[:final_length], pos def unicode_encode_utf_7(s, size, errors, errorhandler=None): if size == 0: return '' result = StringBuilder(size) encodeSetO = encodeWhiteSpace = False inShift = False base64bits = 0 base64buffer = 0 pos = 0 while pos < size: ch = s[pos] oc = ord(ch) if not inShift: if ch == u'+': result.append('+-') elif _utf7_ENCODE_DIRECT(oc, not encodeSetO, not encodeWhiteSpace): result.append(chr(oc)) else: result.append('+') inShift = True base64bits, base64buffer = _utf7_ENCODE_CHAR( result, oc, base64bits, base64buffer) else: if _utf7_ENCODE_DIRECT(oc, not encodeSetO, not encodeWhiteSpace): # shifting out if base64bits: # output remaining bits result.append(_utf7_TO_BASE64(base64buffer << (6-base64bits))) base64buffer = 0 base64bits = 0 inShift = False ## Characters not in the BASE64 set implicitly unshift the ## sequence so no '-' is required, except if the character is ## itself a '-' if _utf7_IS_BASE64(oc) or ch == u'-': result.append('-') result.append(chr(oc)) else: base64bits, base64buffer = _utf7_ENCODE_CHAR( result, oc, base64bits, base64buffer) pos += 1 if base64bits: result.append(_utf7_TO_BASE64(base64buffer << (6 - base64bits))) if inShift: result.append('-') return result.build() # ____________________________________________________________ # ascii and latin-1 def str_decode_latin_1(s, size, errors, final=False, errorhandler=None): # latin1 is equivalent to the first 256 ordinals in Unicode. pos = 0 result = UnicodeBuilder(size) while pos < size: result.append(unichr(ord(s[pos]))) pos += 1 return result.build(), pos def str_decode_ascii(s, size, errors, final=False, errorhandler=None): if errorhandler is None: errorhandler = default_unicode_error_decode # ASCII is equivalent to the first 128 ordinals in Unicode. result = UnicodeBuilder(size) pos = 0 while pos < size: c = s[pos] if ord(c) < 128: result.append(unichr(ord(c))) pos += 1 else: r, pos = errorhandler(errors, "ascii", "ordinal not in range(128)", s, pos, pos + 1) result.append(r) return result.build(), pos # An elidable version, for a subset of the cases @jit.elidable def fast_str_decode_ascii(s): result = UnicodeBuilder(len(s)) for c in s: if ord(c) >= 128: raise ValueError result.append(unichr(ord(c))) return result.build() def unicode_encode_ucs1_helper(p, size, errors, errorhandler=None, limit=256): if errorhandler is None: errorhandler = default_unicode_error_encode if limit == 256: reason = "ordinal not in range(256)" encoding = "latin-1" else: reason = "ordinal not in range(128)" encoding = "ascii" if size == 0: return '' result = StringBuilder(size) pos = 0 while pos < size: ch = p[pos] if ord(ch) < limit: result.append(chr(ord(ch))) pos += 1 else: # startpos for collecting unencodable chars collstart = pos collend = pos+1 while collend < len(p) and ord(p[collend]) >= limit: collend += 1 ru, rs, pos = errorhandler(errors, encoding, reason, p, collstart, collend) if rs is not None: # py3k only result.append(rs) continue for ch in ru: if ord(ch) < limit: result.append(chr(ord(ch))) else: errorhandler("strict", encoding, reason, p, collstart, collend) return result.build() def unicode_encode_latin_1(p, size, errors, errorhandler=None): res = unicode_encode_ucs1_helper(p, size, errors, errorhandler, 256) return res def unicode_encode_ascii(p, size, errors, errorhandler=None): res = unicode_encode_ucs1_helper(p, size, errors, errorhandler, 128) return res # ____________________________________________________________ # Charmap ERROR_CHAR = u'\ufffe' @specialize.argtype(5) def str_decode_charmap(s, size, errors, final=False, errorhandler=None, mapping=None): "mapping can be a rpython dictionary, or a dict-like object." # Default to Latin-1 if mapping is None: return str_decode_latin_1(s, size, errors, final=final, errorhandler=errorhandler) if errorhandler is None: errorhandler = default_unicode_error_decode if size == 0: return u'', 0 pos = 0 result = UnicodeBuilder(size) while pos < size: ch = s[pos] c = mapping.get(ch, ERROR_CHAR) if c == ERROR_CHAR: r, pos = errorhandler(errors, "charmap", "character maps to ", s, pos, pos + 1) result.append(r) continue result.append(c) pos += 1 return result.build(), pos def unicode_encode_charmap(s, size, errors, errorhandler=None, mapping=None): if mapping is None: return unicode_encode_latin_1(s, size, errors, errorhandler=errorhandler) if errorhandler is None: errorhandler = default_unicode_error_encode if size == 0: return '' result = StringBuilder(size) pos = 0 while pos < size: ch = s[pos] c = mapping.get(ch, '') if len(c) == 0: # collect all unencodable chars. Important for narrow builds. collend = pos + 1 while collend < size and mapping.get(s[collend], '') == '': collend += 1 ru, rs, pos = errorhandler(errors, "charmap", "character maps to ", s, pos, collend) if rs is not None: # py3k only result.append(rs) continue for ch2 in ru: c2 = mapping.get(ch2, '') if len(c2) == 0: errorhandler( "strict", "charmap", "character maps to ", s, pos, pos + 1) result.append(c2) continue result.append(c) pos += 1 return result.build() # ____________________________________________________________ # Unicode escape hexdigits = "0123456789ABCDEFabcdef" def hexescape(builder, s, pos, digits, encoding, errorhandler, message, errors): chr = 0 if pos + digits > len(s): endinpos = pos while endinpos < len(s) and s[endinpos] in hexdigits: endinpos += 1 res, pos = errorhandler(errors, encoding, message, s, pos-2, endinpos) builder.append(res) else: try: chr = r_uint(int(s[pos:pos+digits], 16)) except ValueError: endinpos = pos while s[endinpos] in hexdigits: endinpos += 1 res, pos = errorhandler(errors, encoding, message, s, pos-2, endinpos) builder.append(res) else: # when we get here, chr is a 32-bit unicode character if chr <= MAXUNICODE: builder.append(UNICHR(chr)) pos += digits elif chr <= 0x10ffff: chr -= 0x10000L builder.append(unichr(0xD800 + (chr >> 10))) builder.append(unichr(0xDC00 + (chr & 0x03FF))) pos += digits else: message = "illegal Unicode character" res, pos = errorhandler(errors, encoding, message, s, pos-2, pos+digits) builder.append(res) return pos def str_decode_unicode_escape(s, size, errors, final=False, errorhandler=None, unicodedata_handler=None): if errorhandler is None: errorhandler = default_unicode_error_decode if size == 0: return u'', 0 builder = UnicodeBuilder(size) pos = 0 while pos < size: ch = s[pos] # Non-escape characters are interpreted as Unicode ordinals if ch != '\\': builder.append(unichr(ord(ch))) pos += 1 continue # - Escapes pos += 1 if pos >= size: message = "\\ at end of string" res, pos = errorhandler(errors, "unicodeescape", message, s, pos-1, size) builder.append(res) continue ch = s[pos] pos += 1 # \x escapes if ch == '\n': pass elif ch == '\\': builder.append(u'\\') elif ch == '\'': builder.append(u'\'') elif ch == '\"': builder.append(u'\"') elif ch == 'b' : builder.append(u'\b') elif ch == 'f' : builder.append(u'\f') elif ch == 't' : builder.append(u'\t') elif ch == 'n' : builder.append(u'\n') elif ch == 'r' : builder.append(u'\r') elif ch == 'v' : builder.append(u'\v') elif ch == 'a' : builder.append(u'\a') elif '0' <= ch <= '7': x = ord(ch) - ord('0') if pos < size: ch = s[pos] if '0' <= ch <= '7': pos += 1 x = (x<<3) + ord(ch) - ord('0') if pos < size: ch = s[pos] if '0' <= ch <= '7': pos += 1 x = (x<<3) + ord(ch) - ord('0') builder.append(unichr(x)) # hex escapes # \xXX elif ch == 'x': digits = 2 message = "truncated \\xXX escape" pos = hexescape(builder, s, pos, digits, "unicodeescape", errorhandler, message, errors) # \uXXXX elif ch == 'u': digits = 4 message = "truncated \\uXXXX escape" pos = hexescape(builder, s, pos, digits, "unicodeescape", errorhandler, message, errors) # \UXXXXXXXX elif ch == 'U': digits = 8 message = "truncated \\UXXXXXXXX escape" pos = hexescape(builder, s, pos, digits, "unicodeescape", errorhandler, message, errors) # \N{name} elif ch == 'N' and unicodedata_handler is not None: message = "malformed \\N character escape" look = pos if look < size and s[look] == '{': # look for the closing brace while look < size and s[look] != '}': look += 1 if look < size and s[look] == '}': # found a name. look it up in the unicode database message = "unknown Unicode character name" name = s[pos+1:look] code = unicodedata_handler.call(name) if code < 0: res, pos = errorhandler(errors, "unicodeescape", message, s, pos-1, look+1) builder.append(res) continue pos = look + 1 if code <= MAXUNICODE: builder.append(UNICHR(code)) else: code -= 0x10000L builder.append(unichr(0xD800 + (code >> 10))) builder.append(unichr(0xDC00 + (code & 0x03FF))) else: res, pos = errorhandler(errors, "unicodeescape", message, s, pos-1, look+1) builder.append(res) else: res, pos = errorhandler(errors, "unicodeescape", message, s, pos-1, look+1) builder.append(res) else: builder.append(u'\\') builder.append(unichr(ord(ch))) return builder.build(), pos def make_unicode_escape_function(pass_printable=False, unicode_output=False, quotes=False, prefix=None): # Python3 has two similar escape functions: One to implement # encode('unicode_escape') and which outputs bytes, and unicode.__repr__ # which outputs unicode. They cannot share RPython code, so we generate # them with the template below. # Python2 does not really need this, but it reduces diffs between branches. if unicode_output: STRING_BUILDER = UnicodeBuilder STR = unicode CHR = UNICHR else: STRING_BUILDER = StringBuilder STR = str CHR = chr def unicode_escape(s, size, errors, errorhandler=None): # errors and errorhandler are not used: this function cannot cause # Unicode errors return _unicode_escape(s, size) @jit.elidable def _unicode_escape(s, size): result = STRING_BUILDER(size) if quotes: if prefix: result.append(STR(prefix)) if s.find(u'\'') != -1 and s.find(u'\"') == -1: quote = ord('\"') result.append(STR('"')) else: quote = ord('\'') result.append(STR('\'')) else: quote = 0 if size == 0: return STR('') pos = 0 while pos < size: ch = s[pos] oc = ord(ch) # Escape quotes if quotes and (oc == quote or ch == '\\'): result.append(STR('\\')) result.append(CHR(oc)) pos += 1 continue # The following logic is enabled only if MAXUNICODE == 0xffff, or # for testing on top of a host Python where sys.maxunicode == 0xffff if ((MAXUNICODE < 65536 or is_narrow_host()) and 0xD800 <= oc < 0xDC00 and pos + 1 < size): # Map UTF-16 surrogate pairs to Unicode \UXXXXXXXX escapes pos += 1 oc2 = ord(s[pos]) if 0xDC00 <= oc2 <= 0xDFFF: ucs = (((oc & 0x03FF) << 10) | (oc2 & 0x03FF)) + 0x00010000 char_escape_helper(result, ucs) pos += 1 continue # Fall through: isolated surrogates are copied as-is pos -= 1 # Map special whitespace to '\t', \n', '\r' if ch == '\t': result.append(STR('\\t')) elif ch == '\n': result.append(STR('\\n')) elif ch == '\r': result.append(STR('\\r')) elif ch == '\\': result.append(STR('\\\\')) # Map non-printable or non-ascii to '\xhh' or '\uhhhh' elif pass_printable and not (oc <= 0x10ffff and unicodedb.isprintable(oc)): char_escape_helper(result, oc) elif not pass_printable and (oc < 32 or oc >= 0x7F): char_escape_helper(result, oc) # Copy everything else as-is else: result.append(CHR(oc)) pos += 1 if quotes: result.append(CHR(quote)) return result.build() TABLE = STR('0123456789abcdef') def char_escape_helper(result, char): if char >= 0x10000 or char < 0: result.append(STR("\\U")) zeros = 8 elif char >= 0x100: result.append(STR("\\u")) zeros = 4 else: result.append(STR("\\x")) zeros = 2 for i in range(zeros-1, -1, -1): result.append(TABLE[(char >> (4 * i)) & 0x0f]) return unicode_escape, char_escape_helper # This function is also used by _codecs/interp_codecs.py (unicode_encode_unicode_escape, raw_unicode_escape_helper ) = make_unicode_escape_function() (_, raw_unicode_escape_helper_unicode ) = make_unicode_escape_function(unicode_output=True) # ____________________________________________________________ # Raw unicode escape def str_decode_raw_unicode_escape(s, size, errors, final=False, errorhandler=None): if errorhandler is None: errorhandler = default_unicode_error_decode if size == 0: return u'', 0 result = UnicodeBuilder(size) pos = 0 while pos < size: ch = s[pos] # Non-escape characters are interpreted as Unicode ordinals if ch != '\\': result.append(unichr(ord(ch))) pos += 1 continue # \u-escapes are only interpreted iff the number of leading # backslashes is odd bs = pos while pos < size: pos += 1 if pos == size or s[pos] != '\\': break result.append(u'\\') # we have a backslash at the end of the string, stop here if pos >= size: result.append(u'\\') break if ((pos - bs) & 1 == 0 or pos >= size or (s[pos] != 'u' and s[pos] != 'U')): result.append(u'\\') result.append(unichr(ord(s[pos]))) pos += 1 continue digits = 4 if s[pos] == 'u' else 8 message = "truncated \\uXXXX" pos += 1 pos = hexescape(result, s, pos, digits, "rawunicodeescape", errorhandler, message, errors) return result.build(), pos def unicode_encode_raw_unicode_escape(s, size, errors, errorhandler=None): # errorhandler is not used: this function cannot cause Unicode errors if size == 0: return '' result = StringBuilder(size) pos = 0 while pos < size: oc = ord(s[pos]) if MAXUNICODE < 65536 and 0xD800 <= oc < 0xDC00 and pos + 1 < size: # Map UTF-16 surrogate pairs to Unicode \UXXXXXXXX escapes pos += 1 oc2 = ord(s[pos]) if 0xDC00 <= oc2 <= 0xDFFF: ucs = (((oc & 0x03FF) << 10) | (oc2 & 0x03FF)) + 0x00010000 raw_unicode_escape_helper(result, ucs) pos += 1 continue # Fall through: isolated surrogates are copied as-is pos -= 1 if oc < 0x100: result.append(chr(oc)) else: raw_unicode_escape_helper(result, oc) pos += 1 return result.build() # ____________________________________________________________ # unicode-internal def str_decode_unicode_internal(s, size, errors, final=False, errorhandler=None): if errorhandler is None: errorhandler = default_unicode_error_decode if size == 0: return u'', 0 if MAXUNICODE < 65536: unicode_bytes = 2 else: unicode_bytes = 4 if BYTEORDER == "little": start = 0 stop = unicode_bytes step = 1 else: start = unicode_bytes - 1 stop = -1 step = -1 result = UnicodeBuilder(size // unicode_bytes) pos = 0 while pos < size: if pos > size - unicode_bytes: res, pos = errorhandler(errors, "unicode_internal", "truncated input", s, pos, size) result.append(res) continue t = r_uint(0) h = 0 for j in range(start, stop, step): t += r_uint(ord(s[pos + j])) << (h*8) h += 1 if t > MAXUNICODE: res, pos = errorhandler(errors, "unicode_internal", "unichr(%d) not in range" % (t,), s, pos, pos + unicode_bytes) result.append(res) continue result.append(UNICHR(t)) pos += unicode_bytes return result.build(), pos def unicode_encode_unicode_internal(s, size, errors, errorhandler=None): if size == 0: return '' if MAXUNICODE < 65536: unicode_bytes = 2 else: unicode_bytes = 4 result = StringBuilder(size * unicode_bytes) pos = 0 while pos < size: oc = ord(s[pos]) if MAXUNICODE < 65536: if BYTEORDER == "little": result.append(chr(oc & 0xFF)) result.append(chr(oc >> 8 & 0xFF)) else: result.append(chr(oc >> 8 & 0xFF)) result.append(chr(oc & 0xFF)) else: if BYTEORDER == "little": result.append(chr(oc & 0xFF)) result.append(chr(oc >> 8 & 0xFF)) result.append(chr(oc >> 16 & 0xFF)) result.append(chr(oc >> 24 & 0xFF)) else: result.append(chr(oc >> 24 & 0xFF)) result.append(chr(oc >> 16 & 0xFF)) result.append(chr(oc >> 8 & 0xFF)) result.append(chr(oc & 0xFF)) pos += 1 return result.build() # ____________________________________________________________ # MBCS codecs for Windows if sys.platform == 'win32': from rpython.rtyper.lltypesystem import lltype, rffi from rpython.rlib import rwin32 CP_ACP = 0 BOOLP = lltype.Ptr(lltype.Array(rwin32.BOOL, hints={'nolength': True})) MultiByteToWideChar = rffi.llexternal('MultiByteToWideChar', [rffi.UINT, rwin32.DWORD, rwin32.LPCSTR, rffi.INT, rffi.CWCHARP, rffi.INT], rffi.INT, calling_conv='win', save_err=rffi.RFFI_SAVE_LASTERROR) WideCharToMultiByte = rffi.llexternal('WideCharToMultiByte', [rffi.UINT, rwin32.DWORD, rffi.CWCHARP, rffi.INT, rwin32.LPCSTR, rffi.INT, rwin32.LPCSTR, BOOLP], rffi.INT, calling_conv='win', save_err=rffi.RFFI_SAVE_LASTERROR) def is_dbcs_lead_byte(c): # XXX don't know how to test this return False def _decode_mbcs_error(s, errorhandler): if rwin32.GetLastError_saved() == rwin32.ERROR_NO_UNICODE_TRANSLATION: msg = ("No mapping for the Unicode character exists in the target " "multi-byte code page.") errorhandler('strict', 'mbcs', msg, s, 0, 0) else: raise rwin32.lastSavedWindowsError() def str_decode_mbcs(s, size, errors, final=False, errorhandler=None, force_ignore=True): if errorhandler is None: errorhandler = default_unicode_error_decode if not force_ignore and errors not in ('strict', 'ignore'): msg = "mbcs encoding does not support errors='%s'" % errors errorhandler('strict', 'mbcs', msg, s, 0, 0) if size == 0: return u"", 0 if force_ignore or errors == 'ignore': flags = 0 else: # strict flags = rwin32.MB_ERR_INVALID_CHARS # Skip trailing lead-byte unless 'final' is set if not final and is_dbcs_lead_byte(s[size-1]): size -= 1 with rffi.scoped_nonmovingbuffer(s) as dataptr: # first get the size of the result usize = MultiByteToWideChar(CP_ACP, flags, dataptr, size, lltype.nullptr(rffi.CWCHARP.TO), 0) if usize == 0: _decode_mbcs_error(s, errorhandler) with rffi.scoped_alloc_unicodebuffer(usize) as buf: # do the conversion if MultiByteToWideChar(CP_ACP, flags, dataptr, size, buf.raw, usize) == 0: _decode_mbcs_error(s, errorhandler) return buf.str(usize), size def unicode_encode_mbcs(s, size, errors, errorhandler=None, force_replace=True): if errorhandler is None: errorhandler = default_unicode_error_encode if not force_replace and errors not in ('strict', 'replace'): msg = "mbcs encoding does not support errors='%s'" % errors errorhandler('strict', 'mbcs', msg, s, 0, 0) if size == 0: return '' if force_replace or errors == 'replace': flags = 0 used_default_p = lltype.nullptr(BOOLP.TO) else: # strict flags = rwin32.WC_NO_BEST_FIT_CHARS used_default_p = lltype.malloc(BOOLP.TO, 1, flavor='raw') used_default_p[0] = rffi.cast(rwin32.BOOL, False) try: with rffi.scoped_nonmoving_unicodebuffer(s) as dataptr: # first get the size of the result mbcssize = WideCharToMultiByte(CP_ACP, flags, dataptr, size, None, 0, None, used_default_p) if mbcssize == 0: raise rwin32.lastSavedWindowsError() # If we used a default char, then we failed! if (used_default_p and rffi.cast(lltype.Bool, used_default_p[0])): errorhandler('strict', 'mbcs', "invalid character", s, 0, 0) with rffi.scoped_alloc_buffer(mbcssize) as buf: # do the conversion if WideCharToMultiByte(CP_ACP, flags, dataptr, size, buf.raw, mbcssize, None, used_default_p) == 0: raise rwin32.lastSavedWindowsError() if (used_default_p and rffi.cast(lltype.Bool, used_default_p[0])): errorhandler('strict', 'mbcs', "invalid character", s, 0, 0) result = buf.str(mbcssize) assert result is not None return result finally: if used_default_p: lltype.free(used_default_p, flavor='raw') # ____________________________________________________________ # Decimal Encoder def unicode_encode_decimal(s, size, errors, errorhandler=None): """Converts whitespace to ' ', decimal characters to their corresponding ASCII digit and all other Latin-1 characters except \0 as-is. Characters outside this range (Unicode ordinals 1-256) are treated as errors. This includes embedded NULL bytes. """ if errorhandler is None: errorhandler = default_unicode_error_encode if size == 0: return '' result = StringBuilder(size) pos = 0 while pos < size: ch = ord(s[pos]) if unicodedb.isspace(ch): result.append(' ') pos += 1 continue try: decimal = unicodedb.decimal(ch) except KeyError: pass else: result.append(chr(48 + decimal)) pos += 1 continue if 0 < ch < 256: result.append(chr(ch)) pos += 1 continue # All other characters are considered unencodable collstart = pos collend = collstart + 1 while collend < size: ch = ord(s[collend]) try: if (0 < ch < 256 or unicodedb.isspace(ch) or unicodedb.decimal(ch) >= 0): break except KeyError: # not a decimal pass collend += 1 msg = "invalid decimal Unicode string" ru, rs, pos = errorhandler(errors, 'decimal', msg, s, collstart, collend) if rs is not None: # py3k only errorhandler('strict', 'decimal', msg, s, collstart, collend) for char in ru: ch = ord(char) if unicodedb.isspace(ch): result.append(' ') continue try: decimal = unicodedb.decimal(ch) except KeyError: pass else: result.append(chr(48 + decimal)) continue if 0 < ch < 256: result.append(chr(ch)) continue errorhandler('strict', 'decimal', msg, s, collstart, collend) return result.build()