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/* -*-c-*- ---------------- mix_symbol_table.h :
* Type mix_symbol_table_t and functions to manipulate it.
* ------------------------------------------------------------------
* Copyright (C) 2000 jose antonio ortega ruiz <jaortega@acm.org>
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 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 copiying 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);
#endif /* MIX_SYMBOL_TABLE_H */
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