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from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rlib.rwin32 import (BOOLP, WideCharToMultiByte,
MultiByteToWideChar)
from rpython.rlib.rutf8 import (Utf8StringIterator, next_codepoint_pos,
StringBuilder, codepoints_in_utf8, check_utf8)
from rpython.rlib import rwin32
from rpython.rlib.rarithmetic import intmask
def Py_UNICODE_HIGH_SURROGATE(ch):
return rffi.cast(lltype.UniChar, 0xD800 - (0x10000 >> 10) + ((ch) >> 10))
def Py_UNICODE_LOW_SURROGATE(ch):
return rffi.cast(lltype.UniChar, 0xDC00 + ((ch) & 0x3FF))
if rffi.sizeof(rffi.INT) < rffi.sizeof(rffi.SIZE_T):
NEED_RETRY = True
else:
NEED_RETRY = False
WC_ERR_INVALID_CHARS = 0x0080
code_page_map = {
rwin32.CP_ACP: "mbcs",
rwin32.CP_UTF7:"CP_UTF7",
rwin32.CP_UTF8:"CP_UTF8",
}
def _code_page_name(code_page):
return code_page_map.get(code_page, "cp%d" % code_page)
def _decode_code_page_flags(code_page):
if code_page == rwin32.CP_UTF7:
# The CP_UTF7 decoder only supports flags==0
return 0
return rwin32.MB_ERR_INVALID_CHARS
def _encode_code_page_flags(code_page, errors):
if code_page == rwin32.CP_UTF8:
return WC_ERR_INVALID_CHARS
elif code_page == rwin32.CP_UTF7:
return 0
if errors == 'replace':
return 0
return rwin32.WC_NO_BEST_FIT_CHARS
def _decode_cp_error(space, s, w_s, errorhandler, encoding, errors, final, start, end):
# late import to avoid circular import
from pypy.interpreter.unicodehelper import _str_decode_utf8_slowpath
if rwin32.GetLastError_saved() == rwin32.ERROR_NO_UNICODE_TRANSLATION:
msg = ("No mapping for the Unicode character exists in the target "
"multi-byte code page.")
s = s[start:end]
w_s = space.newbytes(s)
r, ignore1, ignore2 = _str_decode_utf8_slowpath(space, s, w_s, errors, final, errorhandler, False)
return r, end
else:
raise rwin32.lastSavedWindowsError()
def _unibuf_to_utf8(dataptr, insize):
"""Encode the widechar unicode buffer u to utf8
Should never error, since the buffer comes from a call to
MultiByteToWideChar
"""
flags = 0
cp = rwin32.CP_UTF8
used_default_p = lltype.nullptr(BOOLP.TO)
# first get the size of the result. This will crash if insize == 0
# It is checked before this call, but check again to make sure
if insize < 1:
return ''
outsize = WideCharToMultiByte(cp, flags, dataptr, insize,
None, 0, None, used_default_p)
if outsize == 0:
raise rwin32.lastSavedWindowsError()
with rffi.scoped_alloc_buffer(outsize) as buf:
# do the conversion
if WideCharToMultiByte(cp, flags, dataptr, insize, buf.raw,
outsize, None, used_default_p) == 0:
raise rwin32.lastSavedWindowsError()
result = buf.str(outsize)
assert result is not None
return result
def _decode_helper(space, cp, s, w_s, flags, encoding, errors, errorhandler,
final, start, end, res):
if end > len(s):
end = len(s)
piece = s[start:end]
with rffi.scoped_nonmovingbuffer(piece) as dataptr:
# first get the size of the result
outsize = MultiByteToWideChar(cp, flags, dataptr, len(piece),
lltype.nullptr(rffi.CWCHARP.TO), 0)
if outsize == 0:
r, pos = _decode_cp_error(space, s, w_s, errorhandler,
encoding, errors, final, start, end)
res.append(r)
return pos, check_utf8(r, True)
with rffi.scoped_alloc_unicodebuffer(outsize) as buf:
# do the conversion
if MultiByteToWideChar(cp, flags, dataptr, len(piece),
buf.raw, outsize) == 0:
r, pos = _decode_cp_error(space, s, w_s, errorhandler,
encoding, errors, final, start, end)
res.append(r)
return pos, check_utf8(r, True)
buf_as_str = buf.str(outsize)
assert buf_as_str is not None
with rffi.scoped_nonmoving_unicodebuffer(buf_as_str) as dataptr:
conv = _unibuf_to_utf8(dataptr, outsize)
res.append(conv)
return end, codepoints_in_utf8(conv)
def str_decode_code_page(space, cp, s, w_s, errors, errorhandler, final=False):
"""Decodes a byte string s from a code page cp with an error handler.
Returns utf8 result, codepoints in s
"""
insize = len(s)
if insize == 0:
return '', 0
flags = _decode_code_page_flags(cp)
encoding = _code_page_name(cp)
assert errorhandler is not None
res = StringBuilder(insize)
if errors == 'strict':
pos, outsize = _decode_helper(space, cp, s, w_s, flags, encoding, errors,
errorhandler, final, 0, len(s), res)
else:
prev_pos = 0
pos = 0
outsize = 0
while pos < len(s):
pos = next_codepoint_pos(s, prev_pos)
pos, _outsize = _decode_helper(space, cp, s, w_s, flags, encoding, errors,
errorhandler, final, prev_pos, pos, res)
prev_pos = pos
outsize += _outsize
return res.build(), outsize
def str_decode_mbcs(space, s, w_s, errors, errorhandler, final=False):
return str_decode_code_page(space, rwin32.CP_ACP, s, w_s, errors, errorhandler, final)
def str_decode_utf8(space, s, w_s, errors, errorhandler, final=False):
return str_decode_code_page(space, rwin32.CP_UTF8, s, w_s, errors, errorhandler, final)
def str_decode_oem(space, s, w_s, errors, errorhandler, final=False):
return str_decode_code_page(space, rwin32.CP_OEMCP, s, w_s, errors, errorhandler, final)
def utf8_encode_code_page(space, cp, s, w_s, errors, errorhandler):
"""Encode a utf8 string s using code page cp and the given
errors/errorhandler.
Returns a encoded byte string
"""
name = _code_page_name(cp)
lgt = len(s)
if lgt == 0:
return ''
flags = _encode_code_page_flags(cp, errors)
if cp in (rwin32.CP_UTF8, rwin32.CP_UTF7):
used_default_p = lltype.nullptr(BOOLP.TO)
else:
used_default_p = lltype.malloc(BOOLP.TO, 1, flavor='raw')
# Encode one codpoint at a time to allow the errorhandlers to do
# their thing
chars = lltype.malloc(rffi.CWCHARP.TO, 2, flavor = 'raw')
res = StringBuilder(lgt)
try:
with rffi.scoped_alloc_buffer(4) as buf:
pos = 0
# TODO: update s if obj != s is returned from an errorhandler
for uni in Utf8StringIterator(s):
if used_default_p:
used_default_p[0] = rffi.cast(rwin32.BOOL, False)
if uni < 0x10000:
chars[0] = rffi.cast(lltype.UniChar, uni)
charsize = 1
else:
chars[0] = Py_UNICODE_HIGH_SURROGATE(uni)
chars[1] = Py_UNICODE_LOW_SURROGATE(uni)
charsize = 2
# first get the size of the result
outsize = WideCharToMultiByte(cp, flags, chars, charsize,
buf.raw, 4, None, used_default_p)
if outsize > 0:
if not (used_default_p and intmask(used_default_p[0])):
r = buf.str(outsize)
assert r is not None
res.append(r)
pos += 1
continue
elif rwin32.GetLastError_saved() != rwin32.ERROR_NO_UNICODE_TRANSLATION:
raise rwin32.lastSavedWindowsError()
# If we used a default char, then we failed!
r, pos, retype, obj, w_obj = errorhandler(errors, name,
"invalid character", w_s, pos, pos+1)
res.append(r)
pos += 1
finally:
lltype.free(chars, flavor='raw')
if used_default_p:
lltype.free(used_default_p, flavor='raw')
return res.build()
def utf8_encode_mbcs(space, s, w_s, errors, errorhandler):
return utf8_encode_code_page(space, rwin32.CP_ACP, s, w_s, errors, errorhandler)
def utf8_encode_oem(space, s, w_s, errors, errorhandler):
return utf8_encode_code_page(space, rwin32.CP_OEMCP, s, w_s, errors, errorhandler)
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