From 4935ec52fc07d4aaa7ae594cfe9986e25ca62dcb Mon Sep 17 00:00:00 2001
From: Bill King <bill.king@nokia.com>
Date: Wed, 10 Feb 2010 10:50:59 +1000
Subject: (ODBC) Use wchar_t instead of assuming 2 bytes.

On some platforms, especially iODBC, wchar_t is a 32bit value, not 16

Task-number: QTBUG-6928
---
 src/sql/drivers/odbc/qsql_odbc.cpp | 37 +++++++++++++++++++++++++++----------
 1 file changed, 27 insertions(+), 10 deletions(-)

diff --git a/src/sql/drivers/odbc/qsql_odbc.cpp b/src/sql/drivers/odbc/qsql_odbc.cpp
index 2049a76..4d3663e 100644
--- a/src/sql/drivers/odbc/qsql_odbc.cpp
+++ b/src/sql/drivers/odbc/qsql_odbc.cpp
@@ -144,6 +144,7 @@ public:
 
     QSqlRecord rInf;
     QVector<QVariant> fieldCache;
+    QVector<wchar_t *> paramCache;
     int fieldCacheIdx;
     int disconnectCount;
     bool hasSQLFetchScroll;
@@ -202,7 +203,7 @@ static QString qWarnODBCHandle(int handleType, SQLHANDLE handle, int *nativeCode
                 *nativeCode = nativeCode_;
             QString tmpstore;
 #ifdef UNICODE
-            tmpstore = QString((const QChar*)description_.data(), msgLen);
+            tmpstore = QString::fromWCharArray((const wchar_t*)description_, msgLen);
 #else
             tmpstore = QString::fromLocal8Bit((const char*)description_.data(), msgLen);
 #endif
@@ -332,7 +333,7 @@ static QString qGetStringData(SQLHANDLE hStmt, int column, int colSize, bool uni
     } else {
         colSize++; // make sure there is room for more than the 0 termination
         if (unicode) {
-            colSize *= 2; // a tiny bit faster, since it saves a SQLGetData() call
+            colSize *= sizeof(wchar_t); // a tiny bit faster, since it saves a SQLGetData() call
         }
     }
     QVarLengthArray<char> buf(colSize);
@@ -353,9 +354,9 @@ static QString qGetStringData(SQLHANDLE hStmt, int column, int colSize, bool uni
             // contain the number of bytes returned - it contains the
             // total number of bytes that CAN be fetched
             // colSize-1: remove 0 termination when there is more data to fetch
-            int rSize = (r == SQL_SUCCESS_WITH_INFO) ? (unicode ? colSize-2 : colSize-1) : lengthIndicator;
+            int rSize = (r == SQL_SUCCESS_WITH_INFO) ? (unicode ? colSize-sizeof(wchar_t) : colSize-1) : lengthIndicator;
             if (unicode) {
-                fieldVal += QString((const QChar*) buf.constData(), rSize / 2);
+                fieldVal += QString::fromWCharArray((wchar_t*)buf.constData(), rSize / sizeof(wchar_t));
             } else {
                 fieldVal += QString::fromAscii(buf.constData(), rSize);
             }
@@ -551,7 +552,7 @@ static QSqlField qMakeFieldInfo(const QODBCPrivate* p, int i )
     }
 
 #ifdef UNICODE
-    QString qColName((const QChar*)colName, colNameLen);
+    QString qColName = QString::fromWCharArray((const wchar_t*)colName, colNameLen);
 #else
     QString qColName = QString::fromLocal8Bit((const char*)colName);
 #endif
@@ -1270,9 +1271,12 @@ bool QODBCResult::exec()
 
     // bind parameters - only positional binding allowed
     QVector<QVariant>& values = boundValues();
+    QVector<wchar_t *> wcharstorage;
+
     int i;
     SQLRETURN r;
     for (i = 0; i < values.count(); ++i) {
+        wcharstorage.append(NULL);
         if (bindValueType(i) & QSql::Out)
             values[i].detach();
         const QVariant &val = values.at(i);
@@ -1435,13 +1439,14 @@ bool QODBCResult::exec()
 #ifndef Q_ODBC_VERSION_2
                 if (d->unicode) {
                     QString str = val.toString();
-                    str.utf16();
+                    int strSize = str.length() * sizeof(wchar_t);
                     if (*ind != SQL_NULL_DATA)
-                        *ind = str.length() * sizeof(QChar);
-                    int strSize = str.length() * sizeof(QChar);
+                        *ind = strSize;
 
                     if (bindValueType(i) & QSql::Out) {
-                        QByteArray ba((char*)str.constData(), str.capacity() * sizeof(QChar));
+                        wchar_t *temp=new wchar_t[str.capacity()*sizeof(wchar_t)];
+                        str.toWCharArray(temp);
+                        QByteArray ba((char*)temp, str.capacity() * sizeof(wchar_t));
                         r = SQLBindParameter(d->hStmt,
                                             i + 1,
                                             qParamType[(QFlag)(bindValueType(i)) & QSql::InOut],
@@ -1453,9 +1458,13 @@ bool QODBCResult::exec()
                                             ba.size(),
                                             ind);
                         tmpStorage.append(ba);
+                        wcharstorage.replace(i,temp);
                         break;
                     }
 
+                    wchar_t *temp=new wchar_t[(1+str.length())*sizeof(wchar_t)];
+                    str.toWCharArray(temp);
+                    temp[str.length()]=0;
                     r = SQLBindParameter(d->hStmt,
                                           i + 1,
                                           qParamType[(QFlag)(bindValueType(i)) & QSql::InOut],
@@ -1463,9 +1472,10 @@ bool QODBCResult::exec()
                                           strSize > 254 ? SQL_WLONGVARCHAR : SQL_WVARCHAR,
                                           strSize,
                                           0,
-                                          (void *)str.constData(),
+                                          (void *)temp,
                                           strSize,
                                           ind);
+                    wcharstorage.replace(i,temp);
                     break;
                 }
                 else
@@ -1515,6 +1525,13 @@ bool QODBCResult::exec()
         }
     }
     r = SQLExecute(d->hStmt);
+
+    for(int i=0;i<wcharstorage.size();i++)
+    {
+        if(wcharstorage.at(i))
+            delete [](wcharstorage.at(i));
+    }
+
     if (r != SQL_SUCCESS && r != SQL_SUCCESS_WITH_INFO) {
         qWarning() << "QODBCResult::exec: Unable to execute statement:" << qODBCWarn(d);
         setLastError(qMakeError(QCoreApplication::translate("QODBCResult",
-- 
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