src/register.c

   1 /*  Copyright (c) 2008-2009 Robert Ancell
   2  *
   3  *  This program is free software; you can redistribute it and/or modify
   4  *  it under the terms of the GNU General Public License as published by
   5  *  the Free Software Foundation; either version 2, or (at your option)
   6  *  any later version.
   7  *
   8  *  This program is distributed in the hope that it will be useful, but
   9  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11  *  General Public License for more details.
  12  *
  13  *  You should have received a copy of the GNU General Public License
  14  *  along with this program; if not, write to the Free Software
  15  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  16  *  02111-1307, USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <glib.h>
  22
  23 #include "register.h"
  24
  25
  26 static gchar *file_name = NULL;
  27 static GHashTable *registers = NULL;
  28
  29
  30 static void
  31 registers_load()
  32 {
  33     FILE *f;
  34     char line[1024];
  35
  36     f = fopen(file_name, "r");
  37     if (!f)
  38         return;
  39
  40     g_hash_table_remove_all(registers);
  41
  42     while (fgets(line, 1024, f) != NULL)
  43     {
  44         char *name, *value;
  45         MPNumber *t;
  46
  47         value = strchr(line, '=');
  48         if (!value)
  49             continue;
  50         *value = '\0';
  51         value = value + 1;
  52
  53         name = g_strstrip(line);
  54         value = g_strstrip(value);
  55
  56         t = g_malloc(sizeof(MPNumber));
  57         if (mp_set_from_string(value, t) == 0)
  58             g_hash_table_insert(registers, g_strdup(name), t);
  59         else
  60             g_free(t);
  61     }
  62     fclose(f);
  63 }
  64
  65
  66 static void
  67 registers_save()
  68 {
  69     gchar *dir;
  70     FILE *f;
  71     GHashTableIter iter;
  72     gpointer key, val;
  73
  74     dir = g_path_get_dirname(file_name);
  75     g_mkdir_with_parents(dir, 0700);
  76     g_free(dir);
  77
  78     f = fopen(file_name, "w");
  79     if (!f)
  80         return;
  81
  82     g_hash_table_iter_init(&iter, registers);
  83     while (g_hash_table_iter_next(&iter, &key, &val))
  84     {
  85         gchar *name = key;
  86         MPNumber *value = val;
  87         char number[1024];
  88
  89         mp_cast_to_string(value, 10, 50, TRUE, number, 1024);
  90         fprintf(f, "%s=%s\n", name, number);
  91     }
  92     fclose(f);
  93 }
  94
  95
  96 void
  97 register_init()
  98 {
  99     registers = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
 100     file_name = g_build_filename(g_get_user_data_dir(), "gcalctool", "registers", NULL);
 101     registers_load();
 102 }
 103
 104
 105 void
 106 register_set_value(const char *name, const MPNumber *value)
 107 {
 108     MPNumber *t;
 109     t = g_malloc(sizeof(MPNumber));
 110     mp_set_from_mp(value, t);
 111     g_hash_table_insert(registers, g_strdup(name), t);
 112     registers_save();
 113 }
 114
 115
 116 MPNumber *
 117 register_get_value(const char *name)
 118 {
 119     return g_hash_table_lookup(registers, name);
 120 }