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diff -up plib-1.8.5/src/ssg/ssgParser.cxx~ plib-1.8.5/src/ssg/ssgParser.cxx
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--- plib-1.8.5/src/ssg/ssgParser.cxx~	2008-03-11 03:06:23.000000000 +0100
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+++ plib-1.8.5/src/ssg/ssgParser.cxx	2012-11-01 15:33:12.424483374 +0100
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@@ -57,18 +57,16 @@ void _ssgParser::error( const char *form
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   char msgbuff[ 255 ];
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   va_list argp;
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-  char* msgptr = msgbuff;
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-  if (linenum)
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-  {
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-    msgptr += sprintf ( msgptr,"%s, line %d: ",
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-      path, linenum );
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-  }
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-
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   va_start( argp, format );
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-  vsprintf( msgptr, format, argp );
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+  vsnprintf( msgbuff, sizeof(msgbuff), format, argp );
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   va_end( argp );
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-  ulSetError ( UL_WARNING, "%s", msgbuff ) ;
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+  if (linenum)
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+  {
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+    ulSetError ( UL_WARNING, "%s, line %d: %s", path, linenum, msgbuff ) ;
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+  } else {
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+    ulSetError ( UL_WARNING, "%s", msgbuff ) ;
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+  }
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 }
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@@ -78,18 +76,16 @@ void _ssgParser::message( const char *fo
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   char msgbuff[ 255 ];
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   va_list argp;
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-  char* msgptr = msgbuff;
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-  if (linenum)
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-  {
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-    msgptr += sprintf ( msgptr,"%s, line %d: ",
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-      path, linenum );
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-  }
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-
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   va_start( argp, format );
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-  vsprintf( msgptr, format, argp );
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+  vsnprintf( msgbuff, sizeof(msgbuff), format, argp );
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   va_end( argp );
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-  ulSetError ( UL_DEBUG, "%s", msgbuff ) ;
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+  if (linenum)
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+  {
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+    ulSetError ( UL_DEBUG, "%s, line %d: %s", path, linenum, msgbuff ) ;
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+  } else {
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+    ulSetError ( UL_DEBUG, "%s", msgbuff ) ;
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+  }
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 }
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 // Opens the file and does a few internal calculations based on the spec.