0031740: Configuration - recover support of Yacc and Lex generation

[occt.git] / src / ExprIntrp / ExprIntrp.lex

diff --git a/src/ExprIntrp/ExprIntrp.lex b/src/ExprIntrp/ExprIntrp.lex
old mode 100755 (executable)
new mode 100644 (file)
index 02eed46..86cc5ca
--- a/src/ExprIntrp/ExprIntrp.lex
+++ b/src/ExprIntrp/ExprIntrp.lex
@@ -1,28 +1,82 @@
+/*
+
+ Copyright (c) 1997-1999 Matra Datavision
+ Copyright (c) 1999-2014 OPEN CASCADE SAS
+
+ This file is part of Open CASCADE Technology software library.
+
+ This library is free software; you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License version 2.1 as published
+ by the Free Software Foundation, with special exception defined in the file
+ OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+ distribution for complete text of the license and disclaimer of any warranty.
+
+ Alternatively, this file may be used under the terms of Open CASCADE
+ commercial license or contractual agreement.
+*/ 
+
 %option yywrap
 %{
 #include <ExprIntrp.tab.h>
+
+#include <ExprIntrp_yaccintrf.hxx>
+
 #define YY_SKIP_YYWRAP
 
 static YY_BUFFER_STATE ExprIntrp_bufstring;
 
-void ExprIntrp_SetResult();
-void ExprIntrp_SetDegree();
-
-void ExprIntrp_start_string(char* str)
+void ExprIntrp_start_string(const char* str)
 {
-  ExprIntrp_bufstring = ExprIntrp_scan_string(str);
+  // depending on configuration and generator, yyconst may be defined as const or empty
+  ExprIntrp_bufstring = ExprIntrp_scan_string((yyconst char*)str);
 }
 
 void ExprIntrp_stop_string()
 {
   ExprIntrp_delete_buffer(ExprIntrp_bufstring);
+  ExprIntrp_bufstring = (YY_BUFFER_STATE) 0;
 }
 
-int yywrap()
+static int yywrap()
 {
   return 1;
 }
 
+// provide safe error handler (exception instead of exit())
+#define YY_FATAL_ERROR(msg) ExprIntrperror(msg)
+
+// MSVC specifics
+#ifdef _MSC_VER
+
+// add includes for flex 2.91 (Linux version)
+#include <stdlib.h>
+#include <io.h>
+
+// Avoid includion of unistd.h if parser is generated on Linux (flex 2.5.35)
+#define YY_NO_UNISTD_H
+
+// disable MSVC warnings in flex 2.89 and 2.5.35 code
+// Note that Intel compiler also defines _MSC_VER but has different warning ids
+#if defined(__INTEL_COMPILER)
+#pragma warning(disable:177 1786 1736)
+#elif defined(__clang__)
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic ignored "-Winconsistent-dllimport"
+#pragma GCC diagnostic ignored "-Wunneeded-internal-declaration"
+#else
+#pragma warning(disable:4131 4244 4273 4127 4267)
+#endif
+
+#endif /* MSC_VER */
+
+#ifdef __GNUC__
+// add includes for flex 2.91 (Linux version)
+#include <unistd.h>
+
+// disable GCC warnings in flex 2.91 code
+#pragma GCC diagnostic ignored "-Wunused-function"
+#endif
+
 %}
 %%
 " "            {;}