X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/libsecurity_codesigning/antlr2/antlr/TokenStreamSelector.hpp

diff --git a/Security/libsecurity_codesigning/antlr2/antlr/TokenStreamSelector.hpp b/Security/libsecurity_codesigning/antlr2/antlr/TokenStreamSelector.hpp
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+#ifndef INC_TokenStreamSelector_hpp__
+#define INC_TokenStreamSelector_hpp__
+
+/* ANTLR Translator Generator
+ * Project led by Terence Parr at http://www.jGuru.com
+ * Software rights: http://www.antlr.org/license.html
+ *
+ * $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/TokenStreamSelector.hpp#2 $
+ */
+
+#include <antlr/config.hpp>
+#include <antlr/TokenStream.hpp>
+#include <map>
+#include <stack>
+
+#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
+namespace antlr {
+#endif
+
+/** A token stream MUX (multiplexor) knows about n token streams
+ *  and can multiplex them onto the same channel for use by token
+ *  stream consumer like a parser.  This is a way to have multiple
+ *  lexers break up the same input stream for a single parser.
+ * Or, you can have multiple instances of the same lexer handle
+ *  multiple input streams; this works great for includes.
+ */
+class ANTLR_API TokenStreamSelector : public TokenStream {
+protected:
+	/** The set of inputs to the MUX */
+#ifdef OS_NO_ALLOCATOR
+	typedef ANTLR_USE_NAMESPACE(std)less<ANTLR_USE_NAMESPACE(std)string> lessp;
+	typedef ANTLR_USE_NAMESPACE(std)map<ANTLR_USE_NAMESPACE(std)string,TokenStream*,lessp> inputStreamNames_coll;
+#else
+	typedef ANTLR_USE_NAMESPACE(std)map<ANTLR_USE_NAMESPACE(std)string,TokenStream*> inputStreamNames_coll;
+#endif
+	inputStreamNames_coll inputStreamNames;
+
+	/** The currently-selected token stream input */
+	TokenStream* input;
+
+	/** Used to track stack of input streams */
+#ifdef OS_NO_ALLOCATOR
+	typedef ANTLR_USE_NAMESPACE(std)stack<TokenStream*, ANTLR_USE_NAMESPACE(std)deque<TokenStream*> > streamStack_coll;
+#else
+	typedef ANTLR_USE_NAMESPACE(std)stack<TokenStream*> streamStack_coll;
+#endif
+	streamStack_coll streamStack;
+
+public:
+	TokenStreamSelector();
+	~TokenStreamSelector();
+
+	void addInputStream(TokenStream* stream, const ANTLR_USE_NAMESPACE(std)string& key);
+
+	/// Return the stream from which tokens are being pulled at the moment.
+	TokenStream* getCurrentStream() const;
+
+	TokenStream* getStream(const ANTLR_USE_NAMESPACE(std)string& sname) const;
+
+	RefToken nextToken();
+
+	TokenStream* pop();
+
+	void push(TokenStream* stream);
+
+	void push(const ANTLR_USE_NAMESPACE(std)string& sname);
+
+	/** Abort recognition of current Token and try again.
+	 *  A stream can push a new stream (for include files
+	 *  for example, and then retry(), which will cause
+	 *  the current stream to abort back to this.nextToken().
+	 *  this.nextToken() then asks for a token from the
+	 *  current stream, which is the new "substream."
+	 */
+	void retry();
+
+	/** Set the stream without pushing old stream */
+	void select(TokenStream* stream);
+
+	void select(const ANTLR_USE_NAMESPACE(std)string& sname);
+};
+
+#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
+}
+#endif
+
+#endif //INC_TokenStreamSelector_hpp__