Correctly convert wxPrintf() to a buffer even when it doesn't fit.

ConvertStringToBuf() helper function was defined incorrectly for converting
wxString to a char* buffer as it didn't fill the buffer at all if the string
didn't fit into it entirely instead of putting as much of the string into it
as possible as was already done for the conversion to wchar_t* buffer. This
broke wxSprintf()-related functions in when the ASCII output buffer was not
big enough as it was not filled at all.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65691 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/common/wxcrt.cpp b/src/common/wxcrt.cpp
index 55ad0812a89c2b22fd09deba2ab50e732689a280..dc51b48e41a7c00179e417ae63bf5bd8c9954dad 100644 (file)
--- a/src/common/wxcrt.cpp
+++ b/src/common/wxcrt.cpp
@@ -586,13 +586,20 @@ namespace
 #if !wxUSE_UTF8_LOCALE_ONLY
 int ConvertStringToBuf(const wxString& s, char *out, size_t outsize)
 {
-    const wxWX2WCbuf buf = s.wc_str();
+    const wxCharBuffer buf(s.mb_str());
 
-    size_t len = wxConvLibc.FromWChar(out, outsize, buf);
-    if ( len != wxCONV_FAILED )
-        return len-1;
-    else
-        return wxConvLibc.FromWChar(NULL, 0, buf);
+    const size_t len = buf.length();
+    if ( outsize > len )
+    {
+        memcpy(out, buf, (len+1) * sizeof(char));
+    }
+    else // not enough space
+    {
+        memcpy(out, buf, (outsize-1) * sizeof(char));
+        out[outsize-1] = '\0';
+    }
+
+    return len;
 }
 #endif // !wxUSE_UTF8_LOCALE_ONLY