filter_reader.cpp

common/dsnlexer.cpp

@@ -111,7 +111,7 @@ void DSNLEXER::PushReader( LINE_READER* aLineReader )
 {
     readerStack.push_back( aLineReader );
     reader = aLineReader;
-    start  = (char*) (*reader);
+    start  = (const char*) (*reader);
 
     // force a new readLine() as first thing.
     limit = start;
@@ -127,7 +127,7 @@ bool DSNLEXER::PopReader()
         readerStack.pop_back();
 
         reader = readerStack.back();
-        start  = (char*) (*reader);
+        start  = (const char*) (*reader);
 
         // force a new readLine() as first thing.
         limit = start;
@@ -336,8 +336,8 @@ static inline bool isSpace( int cc )
 
 int DSNLEXER::NextTok() throw( IO_ERROR )
 {
-    char*   cur  = next;
-    char*   head = cur;
+    const char*   cur  = next;
+    const char*   head = cur;
 
     prevTok = curTok;
 

common/richio.cpp

@@ -107,12 +107,12 @@ unsigned FILE_LINE_READER::ReadLine() throw( IO_ERROR )
     length  = 0;
     line[0] = 0;
 
-    // fgets always put a terminating nul at end of its read.
+    // fgets always puts a terminating nul at end of its read.
     while( fgets( line + length, capacity - length, fp ) )
     {
         length += strlen( line + length );
 
-        if( length == maxLineLength )
+        if( length >= maxLineLength )
             THROW_IO_ERROR( _("Line length exceeded") );
 
         // a normal line breaks here, once through while loop
@@ -122,10 +122,8 @@ unsigned FILE_LINE_READER::ReadLine() throw( IO_ERROR )
         expandCapacity( capacity * 2 );
     }
 
-    /* if( length ) RHH: this may now refer to a non-existent line but
-     * that leads to better error reporting on unexpected end of file.
-     */
-
+    // lineNum is incremented even if there was no line read, because this
+    // leads to better error reporting when we hit an end of file.
     ++lineNum;
 
     return length;

cvpcb/readschematicnetlist.cpp

@@ -114,8 +114,11 @@ int WinEDA_CvpcbFrame::ReadSchematicNetlist()
     }
 
     // FILE_LINE_READER will close the file.
-    FILE_LINE_READER netlistReader( source, m_NetlistFileName.GetFullPath(), BUFFER_CHAR_SIZE );
-    char* Line = netlistReader;
+    FILE_LINE_READER netlistReader( source, m_NetlistFileName.GetFullPath() );
+
+    // hopes netlistReader's line buffer does not move.  It won't unless you encounter
+    // a line larger than LINE_READER_LINE_INITIAL_SIZE = 5000
+    const char* Line = netlistReader.Line();
 
     /* Read the file header (must be  "( { OrCAD PCB" or "({ OrCAD PCB" )
      * or "# EESchema Netlist"
@@ -194,11 +197,11 @@ int WinEDA_CvpcbFrame::ReadSchematicNetlist()
 
         /* idx points the component value.
          * Read value */
-        ptchar = strstr( &Line[idx], " " );  // Search end of value field (space)
+        ptchar = strstr( (char*) &Line[idx], " " );  // Search end of value field (space)
         if( ptchar == 0 )
         {
             wxString msg;
-            msg.Printf( _( "Netlist error: %s" ), Line );
+            msg.Printf( _( "Netlist error: %s" ), (const wxChar*) CONV_FROM_UTF8( Line ) );
             DisplayError( this, msg );
             k = 0;
         }
@@ -213,7 +216,7 @@ int WinEDA_CvpcbFrame::ReadSchematicNetlist()
         }
         cbuffer[jj] = 0;
         // Copy footprint name:
-        if( m_isEESchemaNetlist && (strnicmp( cbuffer, "$noname", 7 ) != 0) )
+        if( m_isEESchemaNetlist &&  strnicmp( cbuffer, "$noname", 7 ) != 0 )
             Cmp->m_Module = CONV_FROM_UTF8(cbuffer);
 
         if( (Line[++idx] == '(') && (Line[k - 1] == ')' ) )
@@ -271,7 +274,7 @@ int WinEDA_CvpcbFrame::ReadSchematicNetlist()
 
 int ReadFootprintFilterList(  FILE_LINE_READER& aNetlistReader, COMPONENT_LIST& aComponentsList )
 {
-    char*       Line = aNetlistReader;
+    const char* Line = aNetlistReader;
     wxString    CmpRef;
     COMPONENT*  Cmp = NULL;
 

include/dsnlexer.h

@@ -77,9 +77,9 @@ enum DSN_SYNTAX_T {
 class DSNLEXER
 {
     bool                iOwnReaders;            ///< on readerStack, should I delete them?
-    char*               start;
-    char*               next;
-    char*               limit;
+    const char*         start;
+    const char*         next;
+    const char*         limit;
 
     typedef std::vector<LINE_READER*>  READER_STACK;
 

include/richio.h

@@ -205,8 +205,14 @@ protected:
 
     wxString    source;         ///< origin of text lines, e.g. filename or "clipboard"
 
+    /**
+     * Function expandCapacity
+     * will exand the capacity of @a line up to maxLineLength but not greater, so
+     * be careful about making assumptions of @a capacity after calling this.
+     */
     void        expandCapacity( unsigned newsize );
 
+
 public:
 
     /**
@@ -238,11 +244,20 @@ public:
      * of lines of text.  The returned string is useful for reporting error
      * messages.
      */
-    const wxString& GetSource() const
+    virtual const wxString& GetSource() const
     {
         return source;
     }
 
+    /**
+     * Function Line
+     * returns a pointer to the last line that was read in.
+     */
+    virtual char* Line() const
+    {
+        return line;
+    }
+
     /**
      * Operator char*
      * is a casting operator that returns a char* pointer to the start of the
@@ -250,7 +265,7 @@ public:
      */
     operator char* () const
     {
-        return line;
+        return Line();
     }
 
     /**
@@ -258,7 +273,7 @@ public:
      * returns the line number of the last line read from this LINE_READER.  Lines
      * start from 1.
      */
-    unsigned LineNumber() const
+    virtual unsigned LineNumber() const
     {
         return lineNum;
     }
@@ -267,7 +282,7 @@ public:
      * Function Length
      * returns the number of bytes in the last line read from this LINE_READER.
      */
-    unsigned Length() const
+    virtual unsigned Length() const
     {
         return length;
     }

new/CMakeLists.txt

@@ -85,6 +85,7 @@ add_executable( test_sch_lib_table
     sch_lib_table_keywords.cpp
     sch_lib.cpp
     sch_lpid.cpp
+    filter_reader.cpp
     sch_dir_lib_source.cpp
     sch_part.cpp
     sweet_keywords.cpp

new/filter_reader.cpp

@@ -0,0 +1,59 @@
+
+
+#include <richio.h>
+#include <string.h>
+
+
+/**
+ * Class FILTER_READER
+ * reads lines of text from another LINE_READER, but only returns non-comment
+ * lines and non-blank lines from its ReadLine() function.
+ */
+class FILTER_READER : public LINE_READER
+{
+    LINE_READER&  reader;
+
+public:
+
+    /**
+     * Constructor ( LINE_READER& )
+     * does not take ownership over @a aReader, so will not destroy it.
+     */
+    FILTER_READER( LINE_READER& aReader ) :
+       reader( aReader )
+    {
+    }
+
+    unsigned ReadLine() throw( IO_ERROR )
+    {
+        unsigned ret;
+
+        while( ( ret = reader.ReadLine() ) != 0 )
+        {
+            if( !strchr( "#\n\r", reader[0] ) )
+                break;
+        }
+        return ret;
+    }
+
+    const wxString& GetSource() const
+    {
+        return reader.GetSource();
+    }
+
+    char* Line() const
+    {
+        return reader.Line();
+    }
+
+    unsigned LineNumber() const
+    {
+        return reader.LineNumber();
+    }
+
+    unsigned Length() const
+    {
+        return reader.Length();
+    }
+};
+