Do not use strlen just to check that a string is non-empty.

modules/gui/qt4/components/simple_preferences.cpp

@@ -1004,7 +1004,7 @@ void addAsso( QVLCRegistry *qvReg, const char *psz_ext )
     /* Save a backup if already assigned */
     char *psz_value = qvReg->ReadRegistryString( psz_ext, "", ""  );
 
-    if( psz_value && strlen( psz_value ) > 0 )
+    if( !EMPTY_STR(psz_value) )
         qvReg->WriteRegistryString( psz_ext, "VLC.backup", psz_value );
     delete psz_value;
 

modules/mux/mpeg/ts.c

@@ -546,7 +546,7 @@ static int Open( vlc_object_t *p_this )
         {
             i_pid = strtoul( psz, &psz_next, 0 );
 
-            if ( strlen(psz_next) > 0 )
+            if ( psz_next[0] != '\0' )
                 psz = &psz_next[1];
             if ( i_pid == 0 )
             {
@@ -665,7 +665,7 @@ static int Open( vlc_object_t *p_this )
         while ( psz != NULL )
         {
             i_pid = strtoul( psz, &psz_next, 0 );
-            if( strlen(psz_next) > 0 )
+            if( psz_next[0] != '\0' )
                 psz = &psz_next[1];
             else
                 psz = NULL;

modules/video_filter/atmo/AtmoMultiConnection.cpp

@@ -95,7 +95,7 @@ ATMO_BOOL CAtmoMultiConnection::OpenConnection()
 
     for(int c = 0; c < 4; c++ ) {
         char *devName = m_pAtmoConfig->getSerialDevice( c );
-        if( devName && strlen(devName) > 0 )
+        if( !EMPTY_STR( devName ) )
         {
             m_hComports[z] = OpenDevice( devName );
             if(m_hComports[z] == INVALID_HANDLE_VALUE) {
@@ -168,7 +168,7 @@ int CAtmoMultiConnection::getNumChannels()
     char *psz_dev;
     for(int i=0;i<4;i++) {
         psz_dev = m_pAtmoConfig->getSerialDevice( i );
-        if( psz_dev && strlen( psz_dev ) > 0 )
+        if( !EMPTY_STR( psz_dev ) )
             z+=4;
     }
 #else

modules/video_filter/atmo/atmo.cpp

@@ -1232,7 +1232,7 @@ static void Atmo_SetupBuildZones(filter_t *p_filter)
               p_filter,
               CFG_PREFIX "channels"
             );
-    if( psz_channels && strlen(psz_channels) > 0 )
+    if( !EMPTY_STR(psz_channels) )
     {
         msg_Dbg( p_filter, "deal with new zone mapping %s", psz_channels );
         int channel = 0;
@@ -1316,7 +1316,7 @@ static void Atmo_SetupBuildZones(filter_t *p_filter)
             p_filter,
             psz_gradient_var_name
             );
-        if(psz_gradient_file && strlen(psz_gradient_file)>0)
+        if( !EMPTY_STR(psz_gradient_file) )
         {
             msg_Dbg( p_filter, "loading gradientfile %s for "\
                                 "zone %d", psz_gradient_file, i);
@@ -1348,7 +1348,7 @@ static void Atmo_SetupBuildZones(filter_t *p_filter)
               p_filter,
               CFG_PREFIX "gradient_path"
             );
-    if( psz_gradient_path && strlen(psz_gradient_path) > 0 )
+    if( EMPTY_STR(psz_gradient_path) )
     {
         char *psz_file_name = (char *)malloc( strlen(psz_gradient_path) + 16 );
         assert( psz_file_name );
@@ -1397,7 +1397,7 @@ static void Atmo_SetupConfig(filter_t *p_filter, CAtmoConfig *p_atmo_config)
                                                       CFG_PREFIX "serialdev" );
     char *psz_temp = psz_serialdev;
 
-    if( psz_temp && strlen(psz_temp) > 0 )
+    if( !EMPTY_STR(psz_serialdev) )
     {
         char *psz_token;
         int i_port = 0;
@@ -1528,7 +1528,7 @@ static void Atmo_SetupConfig(filter_t *p_filter, CAtmoConfig *p_atmo_config)
 
     char *psz_chbase = var_CreateGetStringCommand( p_filter,
                                                    CFG_PREFIX "dmx-chbase" );
-    if( psz_chbase && strlen(psz_chbase) > 0 )
+    if( !EMPTY_STR(psz_chbase) )
         p_atmo_config->setDMX_BaseChannels( psz_chbase );
 
     free( psz_chbase );
@@ -1598,7 +1598,7 @@ static void Atmo_SetupParameters(filter_t *p_filter)
             */
             char *psz_path = var_CreateGetStringCommand( p_filter,
                                                CFG_PREFIX "atmowinexe" );
-            if( psz_path && strlen(psz_path) > 0 )
+            if( !EMPTY_STR(psz_path) )
             {
                 char *psz_bs = strrchr( psz_path , '\\');
                 if( psz_bs )