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diff --git a/src/glsl/pp/sl_pp_token_util.h b/src/glsl/pp/sl_pp_token_util.h
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+++ b/src/glsl/pp/sl_pp_token_util.h
@@ -0,0 +1,103 @@
+/**************************************************************************
+ * 
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#ifndef SL_PP_TOKEN_UTIL_H
+#define SL_PP_TOKEN_UTIL_H
+
+#include <assert.h>
+#include <stdlib.h>
+#include "sl_pp_token.h"
+
+
+struct sl_pp_context;
+
+/*
+ * A token buffer allows one to get and unget a token
+ * from a preprocessor context.
+ */
+struct sl_pp_token_buffer {
+   struct sl_pp_context *context;
+   unsigned int size;
+   unsigned int capacity;
+   struct sl_pp_token_info *tokens;
+};
+
+int
+sl_pp_token_buffer_init(struct sl_pp_token_buffer *buffer,
+                        struct sl_pp_context *context);
+
+void
+sl_pp_token_buffer_destroy(struct sl_pp_token_buffer *buffer);
+
+int
+sl_pp_token_buffer_get(struct sl_pp_token_buffer *buffer,
+                       struct sl_pp_token_info *out);
+
+void
+sl_pp_token_buffer_unget(struct sl_pp_token_buffer *buffer,
+                         const struct sl_pp_token_info *in);
+
+int
+sl_pp_token_buffer_skip_white(struct sl_pp_token_buffer *buffer,
+                              struct sl_pp_token_info *out);
+
+
+/*
+ * A token peek allows one to get a number of tokens from a buffer
+ * and then either commit the operation or abort it,
+ * effectively ungetting the peeked tokens.
+ */
+struct sl_pp_token_peek {
+   struct sl_pp_token_buffer *buffer;
+   unsigned int size;
+   unsigned int capacity;
+   struct sl_pp_token_info *tokens;
+};
+
+int
+sl_pp_token_peek_init(struct sl_pp_token_peek *peek,
+                      struct sl_pp_token_buffer *buffer);
+
+void
+sl_pp_token_peek_destroy(struct sl_pp_token_peek *peek);
+
+int
+sl_pp_token_peek_get(struct sl_pp_token_peek *peek,
+                     struct sl_pp_token_info *out);
+
+void
+sl_pp_token_peek_commit(struct sl_pp_token_peek *peek);
+
+int
+sl_pp_token_peek_to_buffer(const struct sl_pp_token_peek *peek,
+                           struct sl_pp_token_buffer *buffer);
+
+int
+sl_pp_token_peek_skip_white(struct sl_pp_token_peek *peek,
+                            struct sl_pp_token_info *out);
+
+#endif /* SL_PP_TOKEN_UTIL_H */