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/*
* Copyright (C) 2008-2011 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 of the License, or (at your option) any later
* version. See http://www.gnu.org/copyleft/gpl.html the full text of the
* license.
*/
#include <stdio.h>
#include <string.h>
#include "math-variables.h"
#include "mp-serializer.h"
struct MathVariablesPrivate
{
gchar *file_name;
GHashTable *registers;
MpSerializer *serializer;
};
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;
number = mp_serializer_to_string(variables->priv->serializer, value);
fprintf(f, "%s=%s\n", name, number);
g_free(number);
}
fclose(f);
}
// FIXME: Sort
gchar **
math_variables_get_names(MathVariables *variables)
{
GHashTableIter iter;
gpointer key;
gint i = 0;
gchar **names;
g_return_val_if_fail(variables != NULL, NULL);
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(MathVariables *variables, const char *name, const MPNumber *value)
{
MPNumber *t;
g_return_if_fail(variables != NULL);
g_return_if_fail(name != NULL);
g_return_if_fail(value != NULL);
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(MathVariables *variables, const char *name)
{
g_return_val_if_fail(variables != NULL, NULL);
g_return_val_if_fail(name != NULL, NULL);
return g_hash_table_lookup(variables->priv->registers, name);
}
void
math_variables_delete(MathVariables *variables, const char *name)
{
g_return_if_fail(variables != NULL);
g_return_if_fail(name != NULL);
g_hash_table_remove(variables->priv->registers, name);
registers_save(variables);
}
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);
variables->priv->serializer = mp_serializer_new(MP_DISPLAY_FORMAT_SCIENTIFIC, 10, 50);
mp_serializer_set_radix(variables->priv->serializer, '.');
registers_load(variables);
}
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