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* strfuncs.cc (sys_cp_mbstowcs): Check if ASCII SO is followed by at

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least two chars and the next byte is a valid UTF-8 start byte before
	trying to convert the followup bytes as UTF-8 sequence.
This commit is contained in:
Corinna Vinschen
2009-04-01 09:49:25 +00:00
parent d9749de766
commit b4bf8c7064
2 changed files with 12 additions and 2 deletions
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8
winsup/cygwin/strfuncs.cc
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@@ -425,8 +425,12 @@ sys_cp_mbstowcs (UINT cp, PWCHAR dst, size_t dlen, const char *src, size_t nms)
len = (size_t)-1;
while (len > 0 && nms > 0)
{
/* ASCII SO. Convert following UTF-8 sequence (if not UTF-8 anyway). */
if (*pmbs == 0x0e && *charset != 'U'/*TF-8*/)
/* ASCII SO. Sanity check: If this is a lead SO byte for a following
UTF-8 sequence, there must be at least two more bytes left, and the
next byte must be a valid UTF-8 start byte. If the charset isn't
UTF-8 anyway, try to convert the following bytes as UTF-8 sequence. */
if (*pmbs == 0x0e && nms > 2 && *(unsigned char *) (pmbs + 1) >= 0xc2
&& *(unsigned char *) (pmbs + 1) <= 0xf4 && *charset != 'U'/*TF-8*/)
{
pmbs++;
--nms;