wxWidgets requires wchar_t for some time now; wx/chartype.h has a check
to fail complation without it. Simplify code by removing now-dead code
for the !wxUSE_WCHAR_T case.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63991 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Since the changes of r63064 we could return 0 when asked to convert a
non-empty buffer containing only a BOM. This confused the logic in
wxTextInputStream::NextChar() and was generally unexpected so now return
wxCONV_FAILED in this case.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63245 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
wxConvAuto implicitly supposed that the chunk of data passed to it for
translation was big enough to allow it to at least detect the BOM from it.
However this isn't necessarily the case and never is with wxTextInputStream
which reads the bytes one by one.
Fix this by waiting until we have enough data to be able to detect the BOM.
This still doesn't fix the problem with streams without BOM and the
corresponding unit test still fails -- it will need to be fixed at the level
of wxTextInputStream itself later but handling correctly the cases when a BOM
is present is already better than before.
See #11570.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63064 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2. reimplemented UTF-16/32 conversions using To/FromWChar() API instead
of MB2WC/WC2MB for Windows (or rather SIZEOF_WCHAR_T == 2 platforms),
the first tangible result is that reading UTF-32BE text streams now
works too
3. more off by 1 fixes
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38585 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2. this allows to use wxConvAuto() instead of wxConvUTF8 as default value
for this parameter in the classes which read text from the file: wxConvAuto
automatically recognizes the BOM at the start of file and uses the correct
conversion
3. don't use Windows for UTF-7 conversions as there is no way to make it
fail on invalid UTF-7 strings; use our own wxMBConvUtf7 instead
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38570 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
