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Issue #19279: UTF-7 decoder no more produces illegal strings.

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This commit is contained in:
Serhiy Storchaka 2013-10-19 20:39:28 +03:00
commit 55e092f545
3 changed files with 34 additions and 0 deletions
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Objects/unicodeobject.c
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@ -4341,6 +4341,7 @@ PyUnicode_DecodeUTF7Stateful(const char *s,
Py_UCS4 outCh = (Py_UCS4)(base64buffer >> (base64bits-16));
base64bits -= 16;
base64buffer &= (1 << base64bits) - 1; /* clear high bits */
assert(outCh <= 0xffff);
if (surrogate) {
/* expecting a second surrogate */
if (Py_UNICODE_IS_LOW_SURROGATE(outCh)) {
@ -4408,6 +4409,7 @@ PyUnicode_DecodeUTF7Stateful(const char *s,
inShift = 1;
shiftOutStart = writer.pos;
base64bits = 0;
base64buffer = 0;
}
}
else if (DECODE_DIRECT(ch)) { /* character decodes as itself */