Blind fix for OPreparedStatement::setParameter's useWChar case

...after 0181a13904daef160bee543e9806b23a835f79c8 "odbc properly support
platform with sizeof(SQLWCHAR) = 4" introduced usage of RTL_TEXTENCODING_UCS2/4
there, which do not make sense in combination with converting between OString
and OUString.

OTools::getStringValue will need a corresponding fix, too, in the other
direction (where the OUString(sal_uInt32 const * codePoints,
sal_Int32 codPointCount) ctor will be useful).

Change-Id: Ia94cd0deec46d269b6ee43362f4849837bb011c5

1 files changed, 22 insertions, 11 deletions

diff --git a/connectivity/source/drivers/odbc/OPreparedStatement.cxx b/connectivity/source/drivers/odbc/OPreparedStatement.cxx
index 1a39897f433d..e2bf7ce3624f 100644
--- a/connectivity/source/drivers/odbc/OPreparedStatement.cxx
+++ b/connectivity/source/drivers/odbc/OPreparedStatement.cxx
@@ -317,7 +317,6 @@ void OPreparedStatement::setParameter(const sal_Int32 parameterIndex, const sal_
     sal_Int32 nCharLen;
     sal_Int32 nByteLen;
     void *pData;
-    OString sOData;
     if (useWChar)
     {
         /*
@@ -337,23 +336,35 @@ void OPreparedStatement::setParameter(const sal_Int32 parameterIndex, const sal_
          *
          * Our internal OUString storage is always UTF-16, so no conversion to do here.
          */
-        rtl_TextEncoding nSQLWCHAREncoding = RTL_TEXTENCODING_UCS2;
-        if( sizeof(SQLWCHAR) == 4 )
+        BOOST_STATIC_ASSERT(sizeof (SQLWCHAR) == 2 || sizeof (SQLWCHAR) == 4);
+        if (sizeof (SQLWCHAR) == 2)
         {
-            nSQLWCHAREncoding = RTL_TEXTENCODING_UCS4;
+            nCharLen = _sData.getLength();
+            nByteLen = 2 * nCharLen;
+            pData = allocBindBuf(parameterIndex, nByteLen);
+            memcpy(pData, _sData.getStr(), nByteLen);
+        }
+        else
+        {
+            std::vector<sal_uInt32> u;
+            for (sal_Int32 i = 0; i != _sData.getLength();)
+            {
+                u.push_back(_sData.iterateCodePoints(&i));
+            }
+            nCharLen = u.size();
+            nByteLen = 4 * nCharLen;
+            pData = allocBindBuf(parameterIndex, nByteLen);
+            memcpy(pData, u.empty() ? 0 : &u[0], nByteLen);
         }
-
-        sOData = OUStringToOString(_sData, nSQLWCHAREncoding);
-        nByteLen = sOData.getLength();
-        nCharLen = nByteLen / sizeof(SQLWCHAR);
     }
     else
     {
-        sOData = OUStringToOString(_sData, getOwnConnection()->getTextEncoding());
+        OString sOData(
+            OUStringToOString(_sData, getOwnConnection()->getTextEncoding()));
         nCharLen = nByteLen = sOData.getLength();
+        pData = allocBindBuf(parameterIndex, nByteLen);
+        memcpy(pData, sOData.getStr(), nByteLen);
     }
-    pData = allocBindBuf(parameterIndex, nByteLen);
-    memcpy(pData, sOData.getStr(), nByteLen);
 
     setParameter( parameterIndex, _nType, nCharLen, _nScale, pData, nByteLen, nByteLen );
 }