Made sqlite regex cache "instance safe". Further work will continue as I figure out

how to do it :p)

2 files changed, 32 insertions, 20 deletions

diff --git a/libopie2/opiedb/osqlitedriver.cpp b/libopie2/opiedb/osqlitedriver.cpp
index 4eda9b9..f07d520 100644
--- a/libopie2/opiedb/osqlitedriver.cpp
+++ b/libopie2/opiedb/osqlitedriver.cpp
@@ -1,200 +1,204 @@
 /*
                              This file is part of the Opie Project
 
               =.
             .=l.
            .>+-=
  _;:,     .>    :=|.         This program is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or  modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU Library General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This program is distributed in the hope that
      +  .  -:.       =       it will be useful,  but WITHOUT ANY WARRANTY;
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU
 ..}^=.=       =       ;      Library General Public License for more
 ++=   -.     .`     .:       details.
  :     =  ...= . :.=-
  -.   .:....=;==+<;          You should have received a copy of the GNU
   -_. . .   )=.  =           Library General Public License along with
     --        :-=`           this library; see the file COPYING.LIB.
                              If not, write to the Free Software Foundation,
                              Inc., 59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #include "osqlquery.h"
 #include "osqlitedriver.h"
 
 #include <opie2/odebug.h>
 
 #include <stdlib.h>
 #include <regex.h>
 #include <stdio.h>
 
 // fromLocal8Bit() does not work as expected. Thus it
 // is replaced by fromLatin1() (eilers)
 #define __BUGGY_LOCAL8BIT_
 
-	char *regex_raw;
-	regex_t regex_c;
-
 using namespace Opie::DB;
 using namespace Opie::DB::Internal;
 
 namespace {
     struct Query {
         OSQLError::ValueList errors;
         OSQLResultItem::ValueList items;
         OSQLiteDriver *driver;
     };
 }
 
 
 OSQLiteDriver::OSQLiteDriver( QLibrary *lib )
     : OSQLDriver( lib )
 {
     m_sqlite = 0l;
 }
 
 
 OSQLiteDriver::~OSQLiteDriver() {
     close();
 }
 
 
 QString OSQLiteDriver::id()const {
     return QString::fromLatin1("SQLite");
 }
 
 void OSQLiteDriver::setUserName( const QString& ) {}
 
 
 void OSQLiteDriver::setPassword( const QString& ) {}
 
 
 void OSQLiteDriver::setUrl( const QString& url ) {
     m_url = url;
 }
 
 
 void OSQLiteDriver::setOptions( const QStringList& ) {
 }
 
 /*
  * Functions to patch a regex search into sqlite
  */
-int sqliteRlikeCompare(const char *zPattern, const char *zString){
+int sqliteRlikeCompare(const char *zPattern, const char *zString, sqregex *reg){
 	int res;
-	if (regex_raw == NULL || (strcmp (zPattern, regex_raw) != 0)){
-		if (regex_raw != NULL) {
-		    free(regex_raw);
-		    regfree(&regex_c);
+
+	if (reg->regex_raw == NULL || (strcmp (zPattern, reg->regex_raw) != 0)){
+		if (reg->regex_raw != NULL) {
+		    free(reg->regex_raw);
+		    regfree(&reg->regex_c);
 		}
-		regex_raw = (char *)malloc(strlen(zPattern)+1);
-		strncpy(regex_raw, zPattern, strlen(zPattern)+1);
-		res = regcomp(&regex_c, zPattern, REG_EXTENDED);
+		reg->regex_raw = (char *)malloc(strlen(zPattern)+1);
+		strncpy(reg->regex_raw, zPattern, strlen(zPattern)+1);
+		res = regcomp(&reg->regex_c, zPattern, REG_EXTENDED);
 		if ( res != 0 ) {
 		    printf("Regcomp failed with code %u on string %s\n",res,zPattern);
-		    free(regex_raw);
-		    regex_raw=NULL;
+		    free(reg->regex_raw);
+		    reg->regex_raw=NULL;
 		return 0;
 		}
 	}
-	res = (regexec(&regex_c, zString, 0, NULL, 0)==0);
+	res = (regexec(&reg->regex_c, zString, 0, NULL, 0)==0);
 	return res;
 }
 
 void rlikeFunc(sqlite_func *context, int arg, const char **argv){
-	if( argv[0]==0 || argv[1]==0 ) return;
+	if( argv[0]==0 || argv[1]==0 || argv[2]==0){
+		printf("One of arguments Null!!\n");
+		return;
+	}
 		sqlite_set_result_int(context,
 		sqliteRlikeCompare((const char*)argv[0],
-	(const char*)argv[1]));
+	(const char*)argv[1], (sqregex*)argv[2]));
 }
 
 /*
  * try to open a db specified via setUrl
  * and options
  */
 bool OSQLiteDriver::open() {
     char *error;
     qDebug("OSQLiteDriver::open: about to open");
     m_sqlite = sqlite_open(m_url.local8Bit(),
                            0,
                            &error );
 
     /* failed to open */
     if (m_sqlite == 0l ) {
         // FIXME set the last error
         qWarning("OSQLiteDriver::open: %s", error );
         free( error );
         return false;
     }
-    sqlite_create_function(m_sqlite,"rlike",2,rlikeFunc,NULL);
+    sqreg = (sqregex *)malloc(sizeof(sqreg));
+    sqlite_create_function(m_sqlite,"rlike",3,rlikeFunc,&sqreg);
     return true;
 }
 
 
 /* close the db
  * sqlite closes them without
  * telling failure or success
  */
 bool OSQLiteDriver::close() {
     if (m_sqlite )
         sqlite_close( m_sqlite ), m_sqlite=0l;
-	free(regex_raw);
-	regex_raw=NULL;
-	regfree(&regex_c);
+	if (sqreg->regex_raw != NULL){
+    	    free(sqreg->regex_raw);
+	    sqreg->regex_raw=NULL;
+	    regfree(&sqreg->regex_c);
+	}
     return true;
 }
 
 
 /* Query */
 OSQLResult OSQLiteDriver::query( OSQLQuery* qu) {
     if ( !m_sqlite ) {
         // FIXME set error code
         OSQLResult result( OSQLResult::Failure );
         return result;
     }
     Query query;
     query.driver = this;
     char *err;
     /* SQLITE_OK 0 if return code > 0 == failure */
     if ( sqlite_exec(m_sqlite, qu->query(),&call_back, &query, &err)  > 0 ) {
         qWarning("OSQLiteDriver::query: Error while executing");
         free(err );
         // FixMe Errors
     }
 
     OSQLResult result(OSQLResult::Success,
                       query.items,
                       query.errors );
     return result;
 }
 
 
 OSQLTable::ValueList OSQLiteDriver::tables() const {
 
 }
 
 
 OSQLError OSQLiteDriver::lastError() {
     OSQLError error;
     return error;
 };
 
 
 /* handle a callback add the row to the global
  * OSQLResultItem
  */
 int OSQLiteDriver::handleCallBack( int, char**, char** ) {
     return 0;
 }
 
 
 /* callback_handler add the values to the list*/
diff --git a/libopie2/opiedb/osqlitedriver.h b/libopie2/opiedb/osqlitedriver.h
index 9064e52..95c9e2f 100644
--- a/libopie2/opiedb/osqlitedriver.h
+++ b/libopie2/opiedb/osqlitedriver.h
@@ -1,42 +1,50 @@
 #ifndef OSQL_LITE_DRIVER_H
 #define OSQL_LITE_DRIVER_H
 
 #include <sqlite.h>
+#include <regex.h>
 
 #include "osqldriver.h"
 #include "osqlerror.h"
 #include "osqlresult.h"
 
 namespace Opie {
 namespace DB {
 namespace Internal {
 
+struct sqregex {
+	char *regex_raw;
+	regex_t regex_c;
+};
+
 class OSQLiteDriver : public OSQLDriver {
     Q_OBJECT
 public:
     OSQLiteDriver( QLibrary *lib = 0l );
     ~OSQLiteDriver();
     QString id()const;
     void setUserName( const QString& );
     void setPassword( const QString& );
     void setUrl( const QString& url );
     void setOptions( const QStringList& );
     bool open();
     bool close();
     OSQLError lastError();
     OSQLResult query( OSQLQuery* );
     OSQLTable::ValueList tables()const;
+
 private:
     OSQLError m_lastE;
     OSQLResult m_result;
     OSQLResultItem m_items;
     int handleCallBack( int, char**, char** );
     static int call_back( void*, int, char**, char** );
     QString m_url;
     sqlite *m_sqlite;
+    sqregex *sqreg;
 };
 }
 }
 }
 
 #endif