diff --git a/ucpp/hash.h b/ucpp/hash.h
new file mode 100755
index 0000000..d15cbca
--- /dev/null
+++ b/ucpp/hash.h
@@ -0,0 +1,58 @@
+/*
+ * (c) Thomas Pornin 1998, 1999, 2000
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. The name of the authors may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef UCPP__HASH__
+#define UCPP__HASH__
+
+struct hash_item;
+
+struct HT {
+	struct hash_item **lists;
+	int nb_lists;
+	int (*cmpdata)(void *, void *);
+	int (*hash)(void *);
+	void (*deldata)(void *);
+};
+
+int hash_string(char *);
+struct HT *newHT(int, int (*)(void *, void *), int (*)(void *),
+	void (*)(void *));
+void *putHT(struct HT *, void *);
+void *forceputHT(struct HT *, void *);
+void *getHT(struct HT *, void *);
+int delHT(struct HT *, void *);
+struct HT *copyHT(struct HT *);
+void killHT(struct HT *);
+void saveHT(struct HT *, void **);
+void restoreHT(struct HT *, void **);
+void scanHT(struct HT *, void (*)(void *));
+int hash_struct(void *);
+int cmp_struct(void *, void *);
+
+#endif