Gerbview: fix a subtle issue when reading parameter values in Gerber files.

In Gerber files the char 'X' is used as separator.
But when reading parameter values, the sequence "0xnnn" is a number in hexadecimal format, and the 'X' char is not seen as separator by usual strtod or strtol C functions.
This is now fixed.

gerbview/class_am_param.cpp

@@ -75,6 +75,7 @@ double AM_PARAM::GetValue( const D_CODE* aDcode ) const
     for( unsigned ii = 0; ii < m_paramStack.size(); ii++ )
     {
         AM_PARAM_ITEM item = m_paramStack[ii];
+
         switch( item.GetType() )
         {
             case ADD:
@@ -89,7 +90,9 @@ double AM_PARAM::GetValue( const D_CODE* aDcode ) const
                 if( aDcode )    // should be always true here
                 {
                     if( item.GetIndex() <= aDcode->GetParamCount() )
+                    {
                         curr_value = aDcode->GetParam( item.GetIndex() );
+                    }
                     else    // Get parameter from local param definition
                     {
                         const APERTURE_MACRO * am_parent = aDcode->GetMacro();
@@ -104,6 +107,7 @@ double AM_PARAM::GetValue( const D_CODE* aDcode ) const
             case PUSHVALUE: // a value is on the stack:
                 if( item.GetType() == PUSHVALUE )
                     curr_value = item.GetValue();
+
                 switch( state )
                 {
                     case POPVALUE:
@@ -137,6 +141,7 @@ double AM_PARAM::GetValue( const D_CODE* aDcode ) const
                 break;
         }
     }
+
     return paramvalue;
 }
 

gerbview/class_am_param.h

@@ -162,6 +162,7 @@ public:
         m_dvalue = aValue;
         m_ivalue = 0;
     }
+
     AM_PARAM_ITEM( parm_item_type aType, int aValue )
     {
         m_type = aType;
@@ -173,18 +174,22 @@ public:
     {
         m_dvalue = aValue;
     }
+
     double GetValue( ) const
     {
         return m_dvalue;
     }
+
     parm_item_type GetType() const
     {
         return m_type;
     }
+
     unsigned GetIndex() const
     {
         return (unsigned) m_ivalue;
     }
+
     bool IsOperator() const
     {
         return m_type == ADD || m_type == SUB || m_type == MUL || m_type == DIV;
@@ -193,6 +198,7 @@ public:
     {
         return m_type == PUSHVALUE || m_type == PUSHPARM;
     }
+
     bool IsDefered() const
     {
         return m_type == PUSHPARM;

gerbview/class_aperture_macro.cpp

@@ -143,6 +143,7 @@ void AM_PRIMITIVE::DrawBasicShape( GERBER_DRAW_ITEM* aParent,
 
         // shape rotation:
         rotation = params[6].GetValue( tool ) * 10.0;
+
         if( rotation != 0)
         {
             for( unsigned ii = 0; ii < polybuffer.size(); ii++ )
@@ -454,7 +455,7 @@ void AM_PRIMITIVE::ConvertShapeToPolygon( GERBER_DRAW_ITEM*     aParent,
             aBuffer[ii] += start;
         }
     }
-    break;
+        break;
 
     case AMP_LINE_CENTER:
     {
@@ -793,6 +794,7 @@ double APERTURE_MACRO::GetLocalParam( const D_CODE* aDcode, unsigned aParamId )
 {
     // find parameter descr.
     const AM_PARAM * param = NULL;
+
     for( unsigned ii = 0; ii < m_localparamStack.size(); ii ++ )
     {
         if( m_localparamStack[ii].GetIndex() == aParamId )
@@ -801,9 +803,12 @@ double APERTURE_MACRO::GetLocalParam( const D_CODE* aDcode, unsigned aParamId )
             break;
         }
     }
+
     if ( param == NULL )    // not found
         return 0.0;
+
     // Evaluate parameter
     double value = param->GetValue( aDcode );
+
     return value;
 }

gerbview/gerber_test_files/aperture_macro-with_param-test.gbr

@@ -5,6 +5,7 @@ G04 Handcoded by Stefan Petersen *
 %OFA0.0000B0.0000*%
 G90*
 %AMCIRCLE*
+0 this is a comment*
 1,1,$1,0,0*
 %
 %AMVECTOR*

gerbview/readgerb.cpp

@@ -173,6 +173,7 @@ bool GERBER_FILE_IMAGE::LoadGerberFile( const wxString& aFullFileName )
             case 'I':
             case 'J':       /* Auxiliary Move command */
                 m_IJPos = ReadIJCoord( text );
+
                 if( *text == '*' )      // command like X35142Y15945J504*
                 {
                     Execute_DCODE_Command( text,

gerbview/rs274_read_XY_and_IJ_coordinates.cpp

@@ -267,7 +267,18 @@ wxPoint GERBER_FILE_IMAGE::ReadIJCoord( char*& Text )
  */
 int ReadInt( char*& text, bool aSkipSeparator = true )
 {
-    int ret = (int) strtol( text, &text, 10 );
+    int ret;
+
+    // For strtol, a string starting by 0X or 0x is a valid number in hexadecimal or octal.
+    // However, 'X'  is a separator in Gerber strings with numbers.
+    // We need to detect that
+    if( strnicmp( text, "0X", 2 ) == 0 )
+    {
+        text++;
+        ret = 0;
+    }
+    else
+        ret = (int) strtol( text, &text, 10 );
 
     if( *text == ',' || isspace( *text ) )
     {
@@ -290,7 +301,18 @@ int ReadInt( char*& text, bool aSkipSeparator = true )
  */
 double ReadDouble( char*& text, bool aSkipSeparator = true )
 {
-    double ret = strtod( text, &text );
+    double ret;
+
+    // For strtod, a string starting by 0X or 0x is a valid number in hexadecimal or octal.
+    // However, 'X'  is a separator in Gerber strings with numbers.
+    // We need to detect that
+    if( strnicmp( text, "0X", 2 ) == 0 )
+    {
+        text++;
+        ret = 0.0;
+    }
+    else
+        ret = strtod( text, &text );
 
     if( *text == ',' || isspace( *text ) )
     {

gerbview/rs274x.cpp

@@ -733,7 +733,6 @@ bool GERBER_FILE_IMAGE::ExecuteRS274XCommand( int command, char* buff, char*& te
         break;
 
     case AP_DEFINITION:
-
         /* input example:  %ADD30R,0.081800X0.101500*%
          * Aperture definition has 4 options: C, R, O, P
          * (Circle, Rect, Oval, regular Polygon)
@@ -898,18 +897,24 @@ bool GERBER_FILE_IMAGE::ExecuteRS274XCommand( int command, char* buff, char*& te
             if( *text == ',' )
             {   // Read aperture macro parameters and store them
                 text++;     // text points the first parameter
+
                 while( *text && *text != '*' )
                 {
                     double param = ReadDouble( text );
                     dcode->AppendParam( param );
-                    while( isspace( *text ) ) text++;
-                    if( *text == 'X' )
-                        ++text;
+
+                    while( isspace( *text ) )
+                        text++;
+
+                    // Skip 'X' separator:
+                    if( *text == 'X' || *text == 'x' )
+                        text++;
                 }
             }
 
             // lookup the aperture macro here.
             APERTURE_MACRO* pam = FindApertureMacro( am_lookup );
+
             if( !pam )
             {
                 msg.Printf( wxT( "RS274X: aperture macro %s not found\n" ),
@@ -922,6 +927,7 @@ bool GERBER_FILE_IMAGE::ExecuteRS274XCommand( int command, char* buff, char*& te
             dcode->m_Shape = APT_MACRO;
             dcode->SetMacro( pam );
         }
+
         break;
 
     default:
@@ -1024,7 +1030,8 @@ bool GERBER_FILE_IMAGE::ReadApertureMacro( char *buff,
         if( *text == '*' )
             ++text;
 
-        text = GetNextLine( buff, text, gerber_file );  // Get next line
+        text = GetNextLine( buff, text, gerber_file );
+
         if( text == NULL )  // End of File
             return false;
 
@@ -1034,6 +1041,7 @@ bool GERBER_FILE_IMAGE::ReadApertureMacro( char *buff,
         // last line is % or *% sometime found.
         if( *text == '*' )
             ++text;
+
         if( *text == '%' )
             break;      // exit with text still pointing at %
 
@@ -1063,12 +1071,15 @@ bool GERBER_FILE_IMAGE::ReadApertureMacro( char *buff,
         else
             primitive_type = ReadInt( text );
 
+        bool is_comment = false;
+
         switch( primitive_type )
         {
         case AMP_COMMENT:     // lines starting by 0 are a comment
             paramCount = 0;
+            is_comment = true;
             // Skip comment
-            while( *text && (*text != '*') )
+            while( *text && ( *text != '*' ) )
                 text++;
             break;
 
@@ -1114,6 +1125,9 @@ bool GERBER_FILE_IMAGE::ReadApertureMacro( char *buff,
             return false;
         }
 
+        if( is_comment )
+            continue;
+
         AM_PRIMITIVE prim( m_GerbMetric );
         prim.primitive_id = (AM_PRIMITIVE_ID) primitive_type;
         int ii;