added explanatory comment

[wxWidgets.git] / src / common / dbtable.cpp

diff --git a/src/common/dbtable.cpp b/src/common/dbtable.cpp
index fff7942cae7de1ab242c92abedf73ae823359e52..e51af36535a198965b3ce1d7c5720c061ca78d24 100644 (file)
--- a/src/common/dbtable.cpp
+++ b/src/common/dbtable.cpp
@@ -39,6 +39,13 @@
 
 #include "wx/dbtable.h"
 
+// FIXME-UTF8: get rid of this after switching to Unicode-only builds:
+#if wxUSE_UNICODE
+    #define WXSQLCAST(s) ((SQLTCHAR FAR *)(wchar_t*)(s).wchar_str())
+#else
+    #define WXSQLCAST(s) ((SQLTCHAR FAR *)(char*)(s).char_str())
+#endif
+
 ULONG lastTableID = 0;
 
 
@@ -615,7 +622,7 @@ bool wxDbTable::execDelete(const wxString &pSqlStmt)
     RETCODE retcode;
 
     // Execute the DELETE statement
-    retcode = SQLExecDirect(hstmtDelete, (SQLTCHAR FAR *) pSqlStmt.c_str(), SQL_NTS);
+    retcode = SQLExecDirect(hstmtDelete, WXSQLCAST(pSqlStmt), SQL_NTS);
 
     if (retcode == SQL_SUCCESS ||
         retcode == SQL_NO_DATA_FOUND ||
@@ -637,7 +644,7 @@ bool wxDbTable::execUpdate(const wxString &pSqlStmt)
     RETCODE retcode;
 
     // Execute the UPDATE statement
-    retcode = SQLExecDirect(hstmtUpdate, (SQLTCHAR FAR *) pSqlStmt.c_str(), SQL_NTS);
+    retcode = SQLExecDirect(hstmtUpdate, WXSQLCAST(pSqlStmt), SQL_NTS);
 
     if (retcode == SQL_SUCCESS ||
         retcode == SQL_NO_DATA_FOUND ||
@@ -709,7 +716,7 @@ bool wxDbTable::query(int queryType, bool forUpdate, bool distinct, const wxStri
 
     // Execute the SQL SELECT statement
     int retcode;
-    retcode = SQLExecDirect(hstmt, (SQLTCHAR FAR *) (queryType == DB_SELECT_STATEMENT ? pSqlStmt.c_str() : sqlStmt.c_str()), SQL_NTS);
+    retcode = SQLExecDirect(hstmt, (queryType == DB_SELECT_STATEMENT ? WXSQLCAST(pSqlStmt) : WXSQLCAST(sqlStmt)), SQL_NTS);
     if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO)
         return(pDb->DispAllErrors(henv, hdbc, hstmt));
 
@@ -848,7 +855,7 @@ bool wxDbTable::Open(bool checkPrivileges, bool checkTableExists)
         // Prepare the insert statement for execution
         if (insertableCount)
         {
-            if (SQLPrepare(hstmtInsert, (SQLTCHAR FAR *) sqlStmt.c_str(), SQL_NTS) != SQL_SUCCESS)
+            if (SQLPrepare(hstmtInsert, WXSQLCAST(sqlStmt), SQL_NTS) != SQL_SUCCESS)
                 return(pDb->DispAllErrors(henv, hdbc, hstmtInsert));
         }
         else
@@ -1510,7 +1517,7 @@ bool wxDbTable::CreateTable(bool attemptDrop)
                 //  DB2 is limited to 18 characters for index names
                 if (pDb->Dbms() == dbmsDB2)
                 {
-                    wxASSERT_MSG((tableName && wxStrlen(tableName) <= 13), wxT("DB2 table/index names must be no longer than 13 characters in length.\n\nTruncating table name to 13 characters."));
+                    wxASSERT_MSG(!tableName.empty() && tableName.length() <= 13, wxT("DB2 table/index names must be no longer than 13 characters in length.\n\nTruncating table name to 13 characters."));
                     sqlStmt += pDb->SQLTableName(tableName.substr(0, 13).c_str());
 //                    sqlStmt += tableName.substr(0, 13);
                 }
@@ -1563,7 +1570,7 @@ bool wxDbTable::CreateTable(bool attemptDrop)
 #endif
 
     // Execute the CREATE TABLE statement
-    RETCODE retcode = SQLExecDirect(hstmt, (SQLTCHAR FAR *) sqlStmt.c_str(), SQL_NTS);
+    RETCODE retcode = SQLExecDirect(hstmt, WXSQLCAST(sqlStmt), SQL_NTS);
     if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO)
     {
         pDb->DispAllErrors(henv, hdbc, hstmt);
@@ -1603,7 +1610,7 @@ bool wxDbTable::DropTable()
     cout << endl << sqlStmt.c_str() << endl;
 #endif
 
-    RETCODE retcode = SQLExecDirect(hstmt, (SQLTCHAR FAR *) sqlStmt.c_str(), SQL_NTS);
+    RETCODE retcode = SQLExecDirect(hstmt, WXSQLCAST(sqlStmt), SQL_NTS);
     if (retcode != SQL_SUCCESS)
     {
         // Check for "Base table not found" error and ignore
@@ -1772,7 +1779,7 @@ bool wxDbTable::CreateIndex(const wxString &indexName, bool unique, UWORD numInd
 #endif
 
     // Execute the CREATE INDEX statement
-    RETCODE retcode = SQLExecDirect(hstmt, (SQLTCHAR FAR *) sqlStmt.c_str(), SQL_NTS);
+    RETCODE retcode = SQLExecDirect(hstmt, WXSQLCAST(sqlStmt), SQL_NTS);
     if (retcode != SQL_SUCCESS)
     {
         pDb->DispAllErrors(henv, hdbc, hstmt);
@@ -1823,7 +1830,7 @@ bool wxDbTable::DropIndex(const wxString &indexName)
 #ifdef DBDEBUG_CONSOLE
     cout << endl << sqlStmt.c_str() << endl;
 #endif
-    RETCODE retcode = SQLExecDirect(hstmt, (SQLTCHAR FAR *) sqlStmt.c_str(), SQL_NTS);
+    RETCODE retcode = SQLExecDirect(hstmt, WXSQLCAST(sqlStmt), SQL_NTS);
     if (retcode != SQL_SUCCESS)
     {
         // Check for "Index not found" error and ignore
@@ -2470,7 +2477,7 @@ ULONG wxDbTable::Count(const wxString &args)
     }
 
     // Execute the SQL statement
-    if (SQLExecDirect(*hstmtCount, (SQLTCHAR FAR *) sqlStmt.c_str(), SQL_NTS) != SQL_SUCCESS)
+    if (SQLExecDirect(*hstmtCount, WXSQLCAST(sqlStmt), SQL_NTS) != SQL_SUCCESS)
     {
         pDb->DispAllErrors(henv, hdbc, *hstmtCount);
         return(0);