1 files changed, 163 insertions, 0 deletions
diff --git a/src/math-variables.c b/src/math-variables.c
new file mode 100644
index 0000000..b4f7720
--- /dev/null
+++ b/src/math-variables.c
@@ -0,0 +1,163 @@
+/* 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(), "gcalctool", "registers", NULL);
+ registers_load(variables);
+}