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diff --git a/mixlib/mix_symbol_table.h b/mixlib/mix_symbol_table.h
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+/* -*-c-*- ---------------- mix_symbol_table.h :
+ * Type mix_symbol_table_t and functions to manipulate it.
+ * ------------------------------------------------------------------
+ * Copyright (C) 2000, 2004 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+
+#ifndef MIX_SYMBOL_TABLE_H
+#define MIX_SYMBOL_TABLE_H
+
+#include <stdio.h>
+#include "mix_types.h"
+
+/* A symbol table shall be implemented as a hash table */
+typedef GHashTable mix_symbol_table_t ;
+
+/* Maximum length of stored symbols */
+#define MIX_SYM_MAX_LEN  10
+
+/* Create an empty table */
+extern mix_symbol_table_t *
+mix_symbol_table_new (void);
+
+/* Create a table and populate it with the contents of a table stored
+   in -file- using mix_symbol_table_print (table, MIX_SYM_LINE, file)
+*/
+extern mix_symbol_table_t *
+mix_symbol_table_new_from_file (FILE *file);
+
+
+/* Delete a table */
+extern void
+mix_symbol_table_delete (mix_symbol_table_t *table);
+
+/* add/remove symbols from other table */
+extern gboolean
+mix_symbol_table_merge_table (mix_symbol_table_t *table,
+			      const mix_symbol_table_t *from);
+
+extern gboolean
+mix_symbol_table_substract_table (mix_symbol_table_t *table,
+				  const mix_symbol_table_t *other);
+
+/* Add/remove symbols one by one */
+/* possible outcomes: */
+enum {
+  MIX_SYM_FAIL, /* attempt failed */
+  MIX_SYM_OK,
+  MIX_SYM_DUP,  /* duplicated symbol */
+  MIX_SYM_LONG  /* symbol too long: only MIX_SYM_MAX_LEN chars used */
+};
+
+extern gint
+mix_symbol_table_add (mix_symbol_table_t *table,
+		      const gchar *sym, mix_word_t value);
+
+#define mix_symbol_table_remove(table, sym) \
+  g_hash_table_remove (table, sym)
+
+
+/* Add or modify symbol if it exists */
+extern gint
+mix_symbol_table_insert (mix_symbol_table_t *table,
+			 const gchar *sym, mix_word_t new_value);
+
+/* Add or modify symbol if it exists, without copying sym */
+#define mix_symbol_table_insert_static(table,sym,value)\
+	g_hash_table_insert (table,(gpointer)sym,GUINT_TO_POINTER (value))
+
+/* Symbols lookup */
+extern gboolean
+mix_symbol_table_is_defined (const mix_symbol_table_t *table, const gchar *sym);
+
+#define mix_symbol_table_value(table,sym)				    \
+  (mix_word_t)GPOINTER_TO_UINT  (g_hash_table_lookup ((GHashTable *)table, \
+                                (gpointer)sym))
+
+/* Traverse the table */
+#define mix_symbol_table_foreach(table,func,data) \
+	g_hash_table_foreach (table,func,data)
+
+/* Print the table */
+enum {
+  MIX_SYM_ROWS, /* each symbol/value in a row */
+  MIX_SYM_LINE  /* {,symbol =value}*; in a single row */
+};
+
+extern void
+mix_symbol_table_print (const mix_symbol_table_t *table, gint mode,
+			FILE *file, gboolean skiplocal);
+
+
+#endif /* MIX_SYMBOL_TABLE_H */
+