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
@@ -41,9 +41,6 @@
 // is replaced by fromLatin1() (eilers)
 #define __BUGGY_LOCAL8BIT_
 
-        char *regex_raw;
-        regex_t regex_c;
-
 using namespace Opie::DB;
 using namespace Opie::DB::Internal;
 
@@ -89,32 +86,36 @@ 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]));
 }
 
 /*
@@ -135,7 +136,8 @@ bool OSQLiteDriver::open() {
         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;
 }
 
@@ -147,9 +149,11 @@ bool OSQLiteDriver::open() {
 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;
 }
 
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
@@ -2,6 +2,7 @@
 #define OSQL_LITE_DRIVER_H
 
 #include <sqlite.h>
+#include <regex.h>
 
 #include "osqldriver.h"
 #include "osqlerror.h"
@@ -11,6 +12,11 @@ namespace Opie {
 namespace DB {
 namespace Internal {
 
+struct sqregex {
+        char *regex_raw;
+        regex_t regex_c;
+};
+
 class OSQLiteDriver : public OSQLDriver {
     Q_OBJECT
 public:
@@ -26,6 +32,7 @@ public:
     OSQLError lastError();
     OSQLResult query( OSQLQuery* );
     OSQLTable::ValueList tables()const;
+
 private:
     OSQLError m_lastE;
     OSQLResult m_result;
@@ -34,6 +41,7 @@ private:
     static int call_back( void*, int, char**, char** );
     QString m_url;
     sqlite *m_sqlite;
+    sqregex *sqreg;
 };
 }
 }