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A few documentation updates, cross-references, properties of UTF-8,

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wx??2??buf macros.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7032 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Ove Kaaven
2000-04-02 00:27:04 +00:00
parent 9728ba5c8a
commit 73830147df
7 changed files with 67 additions and 13 deletions
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27
docs/latex/wx/tmbconv.tex
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@@ -9,7 +9,7 @@
%% Licence: wxWindows license
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{wxMBConv classes}\label{mbconvclasses}
\section{wxMBConv classes overview}\label{mbconvclasses}
Classes: \helpref{wxMBConv}{wxmbconv}, \helpref{wxMBConvFile}{wxmbconvfile},
\helpref{wxMBConvUTF7}{wxmbconvutf7}, \helpref{wxMBConvUTF8}{wxmbconvutf8},
@@ -122,7 +122,7 @@ Using preconstructed wxCSConv instance.
\begin{verbatim}
wxCSConv cust(user_encoding);
printf("Data: %s\\n", (const char*) str.mb_str(cust));
printf("Data: %s\n", (const char*) str.mb_str(cust));
\end{verbatim}
Note: Since mb_str() returns a temporary wxCharBuffer to hold the result
@@ -147,9 +147,30 @@ set using the passed conversion object, *wxConvCurrent. (In a Unicode build
of wxWindows, the constructor ignores the passed conversion object and
retains the Unicode data.)
This could also be done by first making a wxString of the original data:
\begin{verbatim}
wxString input_str(input_data);
wxString str(input_str.wc_str(wxConvUTF8), *wxConvCurrent);
\end{verbatim}
To print a wxChar buffer to a non-Unicode stdout:
\begin{verbatim}
printf("Data: %s\\n", (const char*) wxConvCurrent->cWX2MB(unicode_data));
printf("Data: %s\n", (const char*) wxConvCurrent->cWX2MB(unicode_data));
\end{verbatim}
If you need to do more complex processing on the converted data, you
may want to store the temporary buffer in a local variable:
\begin{verbatim}
const wxWX2MBbuf tmp_buf = wxConvCurrent->cWX2MB(unicode_data);
const char *tmp_str = (const char*) tmp_buf;
printf("Data: %s\n", tmp_str);
process_data(tmp_str);
\end{verbatim}
If a conversion had taken place in cWX2MB (i.e. in a Unicode build),
the buffer will be deallocated as soon as tmp_buf goes out of scope.
(The macro wxWX2MBbuf reflects the correct return value of cWX2MB
(either char* or wxCharBuffer), except for the const.)