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/* -*-c-*- -------------- mix_symbol_table.c :
* Implementation of the functions declared in mix_symbol_table.h
* ------------------------------------------------------------------
* Copyright (C) 2000, 2001, 2004, 2006 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.
*
*/
#include <ctype.h> /* isdigit */
#include <string.h>
#include "mix_symbol_table.h"
/* Create an empty table */
mix_symbol_table_t *
mix_symbol_table_new (void)
{
return g_hash_table_new (g_str_hash, g_str_equal);
}
/* 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)
*/
mix_symbol_table_t *
mix_symbol_table_new_from_file (FILE *file)
{
mix_symbol_table_t *result = mix_symbol_table_new ();
if ( result != NULL )
{
gchar sym[MIX_SYM_MAX_LEN + 1];
glong val;
while ( getc (file) == ',' )
{
if ( fscanf (file, "%s =%ld", sym, &val) != EOF )
mix_symbol_table_add (result, sym, mix_word_new (val));
}
}
return result;
}
/* Delete a table */
static void
delete_hash_keys_ (gpointer key, gpointer value, gpointer data)
{
g_free (key);
}
void
mix_symbol_table_delete (mix_symbol_table_t *table)
{
g_hash_table_foreach (table, delete_hash_keys_, NULL);
g_hash_table_destroy (table);
}
/* add/remove symbols from other table */
static void
add_symbol_ (gpointer symbol, gpointer value, gpointer target)
{
mix_symbol_table_t *t = (mix_symbol_table_t *)target;
gchar *s = (gchar *)symbol;
mix_word_t v = (mix_word_t)GPOINTER_TO_UINT (value);
mix_symbol_table_insert (t, s, v);
}
static void
remove_symbol_ (gpointer symbol, gpointer value, gpointer target)
{
mix_symbol_table_t *t = (mix_symbol_table_t *)target;
gchar *s = (gchar *)symbol;
mix_symbol_table_remove (t, s);
}
gboolean
mix_symbol_table_merge_table (mix_symbol_table_t *table,
const mix_symbol_table_t *from)
{
g_return_val_if_fail (table != NULL, FALSE);
if (from != NULL)
{
mix_symbol_table_foreach ((gpointer)from, add_symbol_, table);
}
return TRUE;
}
gboolean
mix_symbol_table_substract_table (mix_symbol_table_t *table,
const mix_symbol_table_t *other)
{
g_return_val_if_fail (table != NULL, FALSE);
if (other != NULL)
{
mix_symbol_table_foreach ((gpointer)other, remove_symbol_, table);
}
return TRUE;
}
/* Add/remove symbols one by one */
gint
mix_symbol_table_add (mix_symbol_table_t *table,
const gchar *sym, mix_word_t value)
{
gpointer key, val;
if ( table == NULL || sym == NULL ) return MIX_SYM_FAIL;
if ( strlen (sym) > MIX_SYM_MAX_LEN ) return MIX_SYM_LONG;
if ( !g_hash_table_lookup_extended (table, sym, &key, &val) )
{
key = g_strdup (sym);
g_hash_table_insert (table, key, GINT_TO_POINTER (value));
return MIX_SYM_OK;
}
else
return MIX_SYM_DUP;
}
/* Add or modify symbol if it exists */
gint
mix_symbol_table_insert (mix_symbol_table_t *table,
const gchar *sym, mix_word_t new_value)
{
gpointer key, val;
if ( table == NULL || sym == NULL ) return MIX_SYM_FAIL;
if ( strlen (sym) > MIX_SYM_MAX_LEN ) return MIX_SYM_LONG;
if ( !g_hash_table_lookup_extended (table, sym, &key, &val) )
key = g_strdup (sym);
g_hash_table_insert (table, key, GINT_TO_POINTER (new_value));
return MIX_SYM_OK;
}
/* Symbols lookup */
gboolean
mix_symbol_table_is_defined (const mix_symbol_table_t *table, const gchar *sym)
{
gpointer key, val;
return g_hash_table_lookup_extended((GHashTable *)table, sym, &key, &val);
}
/* Print table */
#define is_local_sym_(sym) \
((sym) && (strlen (sym)==2) && (sym[1] == 'B') && isdigit (sym[0]))
static gboolean skip_ = FALSE;
static void
print_sym_rows_ (gpointer symbol, gpointer value, gpointer file)
{
char *s = (char *)symbol;
if (skip_ && !is_local_sym_ (s)) {
mix_word_t word = (mix_word_t)GPOINTER_TO_UINT (value);
fprintf((FILE *)file, "%-20s: %s%ld\n", s,
mix_word_is_negative (word)? "-":"",
mix_word_magnitude (word));
}
}
static void
print_sym_line_ (gpointer symbol, gpointer value, gpointer file)
{
char *s = (char *)symbol;
if (skip_ && !is_local_sym_ (s)) {
mix_word_t word = (mix_word_t)GPOINTER_TO_UINT (value);
fprintf((FILE *)file, ",%s =%s%ld", s,
mix_word_is_negative (word)? "-":"",
mix_word_magnitude (word));
}
}
void
mix_symbol_table_print (const mix_symbol_table_t *table, gint mode,
FILE *file, gboolean skiplocal)
{
GHFunc func = (mode == MIX_SYM_LINE)? print_sym_line_ : print_sym_rows_;
skip_ = skiplocal;
if ( table != NULL )
g_hash_table_foreach ((GHashTable *)table, func, (gpointer)file);
if ( mode == MIX_SYM_LINE ) putc (';', file); /* to mark end-of-table */
}
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