Create a more modular type system for the FT_* types. Put them

into epan/ftypes.

Re-write display filter routines using Lemon parser instead of yacc.
Besides using a different tool, the new grammar is much simpler, while
the display filter engine itself is more powerful and more easily extended.

Add dftest executable, to test display filter "bytecode" generation.
Add option to "configure" to build dftest or randpkt, both of which are not
built by default.

Implement Ed Warnicke's ideas about dranges in the new display filter and
ftype code.

Remove type FT_TEXT_ONLY in favor of FT_NONE, and have protocols registered
as FT_PROTOCOL. Thus, FT_NONE is used only for simple labels in the proto tree,
while FT_PROTOCOL is used for protocols. This was necessary for being
able to make byte slices (ranges) out of protocols, like "frame[0:3]"

Win32 Makefile.nmake's will be added tonight.

svn path=/trunk/; revision=2967

1 files changed, 59 insertions, 0 deletions

diff --git a/tools/lemon/lemonflex-tail.inc b/tools/lemon/lemonflex-tail.inc
new file mode 100644
index 0000000000..04eaf2ab2d
--- /dev/null
+++ b/tools/lemon/lemonflex-tail.inc
@@ -0,0 +1,59 @@
+/* $Id: lemonflex-tail.inc,v 1.1 2001/02/01 20:21:25 gram Exp $ */
+
+/* This file is #include'd at the bottom of a Lex/Flex scanner
+for use with the Lemon parser. You must have #define'd:
+
+MODNAME		module name for creating function names:
+
+Prototypes:
+
+void	MODNAME_scanner_text(char *text);
+void	MODNAME_scanner_cleanup(void);
+int	MODNAME_wrap(void);
+*/
+
+#include <cppmagic.h>
+
+#define TEXT_FUNC	CONCAT(MODNAME,_scanner_text)
+#define FILE_FUNC	CONCAT(MODNAME,_scanner_file)
+#define CLEANUP_FUNC	CONCAT(MODNAME,_scanner_cleanup)
+#define WRAP_FUNC	CONCAT(MODNAME,_wrap)
+
+
+/* Resets scanner and assigns the char* argument
+ * as the text to scan
+ */
+void
+TEXT_FUNC (const char *text)
+{
+	yy_scan_string(text);
+}
+
+void
+FILE_FUNC (FILE* fh)
+{
+	YY_BUFFER_STATE new_buffer;
+
+	new_buffer = yy_create_buffer(fh, YY_BUF_SIZE);
+	yy_switch_to_buffer(new_buffer);
+}
+
+void
+CLEANUP_FUNC (void)
+{
+	BEGIN(INITIAL);
+	yy_delete_buffer(YY_CURRENT_BUFFER);
+}
+
+/* Flex has an option '%option noyywrap' so that I don't have to
+ * provide this yywrap function, but in order to maintain portability,
+ * I'll just use this yywrap() function.
+ */
+int
+WRAP_FUNC ()
+{
+	return 1; /* stop at EOF, instead of looking for next file */
+}
+
+
+