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check that the conversion really succeeds even when wxMBConv_win32::WC2MB() is called with NULL buffer

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48643 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2007-09-12 00:39:21 +00:00
parent e040a4ff2c
commit 765bdb4a1b
1 changed files with 25 additions and 15 deletions
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40
src/common/strconv.cpp
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@@ -2426,26 +2426,36 @@ public:
return wxCONV_FAILED;
}
// if we were really converting, check if we succeeded
if ( buf )
// we did something, check if we really succeeded
if ( flags )
{
if ( flags )
// check if the conversion failed, i.e. if any replacements
// were done
if ( usedDef )
return wxCONV_FAILED;
}
else // we must resort to double tripping...
{
// first we need to ensure that we really have the MB data: this is
// not the case if we're called with NULL buffer, in which case we
// need to do the conversion yet again
wxCharBuffer bufDef;
if ( !buf )
{
// check if the conversion failed, i.e. if any replacements
// were done
if ( usedDef )
bufDef = wxCharBuffer(len);
buf = bufDef.data();
if ( !::WideCharToMultiByte(m_CodePage, flags, pwz, -1,
buf, len, NULL, NULL) )
return wxCONV_FAILED;
}
else // we must resort to double tripping...
wxWCharBuffer wcBuf(n);
if ( MB2WC(wcBuf.data(), buf, n) == wxCONV_FAILED ||
wcscmp(wcBuf, pwz) != 0 )
{
wxWCharBuffer wcBuf(n);
if ( MB2WC(wcBuf.data(), buf, n) == wxCONV_FAILED ||
wcscmp(wcBuf, pwz) != 0 )
{
// we didn't obtain the same thing we started from, hence
// the conversion was lossy and we consider that it failed
return wxCONV_FAILED;
}
// we didn't obtain the same thing we started from, hence
// the conversion was lossy and we consider that it failed
return wxCONV_FAILED;
}
}