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/* Copyright (c) 2008-2009 Robert Ancell
*
* 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, 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.
*/
#include <stdio.h>
#include <string.h>
#include "math-variables.h"
struct MathVariablesPrivate
{
gchar *file_name;
GHashTable *registers;
};
G_DEFINE_TYPE (MathVariables, math_variables, G_TYPE_OBJECT);
MathVariables *
math_variables_new()
{
return g_object_new (math_variables_get_type(), NULL);
}
static void
registers_load(MathVariables *variables)
{
FILE *f;
char line[1024];
f = fopen(variables->priv->file_name, "r");
if (!f)
return;
g_hash_table_remove_all(variables->priv->registers);
while (fgets(line, 1024, f) != NULL)
{
char *name, *value;
MPNumber *t;
value = strchr(line, '=');
if (!value)
continue;
*value = '\0';
value = value + 1;
name = g_strstrip(line);
value = g_strstrip(value);
t = g_malloc(sizeof(MPNumber));
if (mp_set_from_string(value, 10, t) == 0)
g_hash_table_insert(variables->priv->registers, g_strdup(name), t);
else
g_free(t);
}
fclose(f);
}
static void
registers_save(MathVariables *variables)
{
gchar *dir;
FILE *f;
GHashTableIter iter;
gpointer key, val;
dir = g_path_get_dirname(variables->priv->file_name);
g_mkdir_with_parents(dir, 0700);
g_free(dir);
f = fopen(variables->priv->file_name, "w");
if (!f)
return;
g_hash_table_iter_init(&iter, variables->priv->registers);
while (g_hash_table_iter_next(&iter, &key, &val))
{
gchar *name = key;
MPNumber *value = val;
char number[1024];
mp_cast_to_string(value, 10, 10, 50, TRUE, number, 1024);
fprintf(f, "%s=%s\n", name, number);
}
fclose(f);
}
// FIXME: Sort
gchar **
math_variables_get_names(MathVariables *variables)
{
GHashTableIter iter;
gpointer key;
gint i = 0;
gchar **names;
names = g_malloc0(sizeof(gchar *) * (g_hash_table_size(variables->priv->registers) + 1));
g_hash_table_iter_init(&iter, variables->priv->registers);
while (g_hash_table_iter_next(&iter, &key, NULL))
{
gchar *name = key;
names[i] = g_strdup(name);
i++;
}
names[i] = NULL;
return names;
}
void
math_variables_set_value(MathVariables *variables, const char *name, const MPNumber *value)
{
MPNumber *t;
t = g_malloc(sizeof(MPNumber));
mp_set_from_mp(value, t);
g_hash_table_insert(variables->priv->registers, g_strdup(name), t);
registers_save(variables);
}
MPNumber *
math_variables_get_value(MathVariables *variables, const char *name)
{
return g_hash_table_lookup(variables->priv->registers, name);
}
static void
math_variables_class_init (MathVariablesClass *klass)
{
g_type_class_add_private (klass, sizeof (MathVariablesPrivate));
}
static void
math_variables_init(MathVariables *variables)
{
variables->priv = G_TYPE_INSTANCE_GET_PRIVATE (variables, math_variables_get_type(), MathVariablesPrivate);
variables->priv->registers = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
variables->priv->file_name = g_build_filename(g_get_user_data_dir(), "mate-calc", "registers", NULL);
registers_load(variables);
}
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