New plugin library framework for loading and saving .cfg files

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4912 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/lib/configfile.c

@@ -0,0 +1,108 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "plugin.h"
+#include "configfile.h"
+
+static struct plugin_api *cfg_rb;
+
+void configfile_init(struct plugin_api* newrb)
+{
+    cfg_rb = newrb;
+}
+
+int configfile_save(char *filename, struct configdata *cfg, int num_items)
+{
+    int fd;
+    int i;
+    char buf[MAX_PATH];
+
+    cfg_rb->snprintf(buf, MAX_PATH, "/.rockbox/rocks/%s", filename);
+    fd = cfg_rb->creat(buf, 0);
+    if(fd < 0)
+        return fd*10 - 1;
+
+    for(i = 0;i < num_items;i++) {
+        switch(cfg[i].type) {
+            case TYPE_INT:
+                cfg_rb->fprintf(fd, "%s: %d\n",
+                                cfg[i].name,
+                                *cfg[i].val);
+                break;
+
+            case TYPE_ENUM:
+                cfg_rb->fprintf(fd, "%s: %s\n",
+                                cfg[i].name,
+                                cfg[i].values[*cfg[i].val]);
+                break;
+                
+            case TYPE_STRING:
+                cfg_rb->fprintf(fd, "%s: %s\n",
+                                cfg[i].name,
+                                cfg[i].string);
+                break;
+
+        }
+    }
+
+    cfg_rb->close(fd);
+    return 0;
+}
+
+int configfile_load(char *filename, struct configdata *cfg, int num_items)
+{
+    int fd;
+    int i, j;
+    char *name;
+    char *val;
+    char buf[MAX_PATH];
+
+    cfg_rb->snprintf(buf, MAX_PATH, "/.rockbox/rocks/%s", filename);
+    fd = cfg_rb->open(buf, O_RDONLY);
+    if(fd < 0)
+        return fd*10 - 1;
+
+    while(cfg_rb->read_line(fd, buf, MAX_PATH) > 0) {
+        cfg_rb->settings_parseline(buf, &name, &val);
+        
+        for(i = 0;i < num_items;i++) {
+            if(!cfg_rb->strcmp(cfg[i].name, name)) {
+                switch(cfg[i].type) {
+                    case TYPE_INT:
+                        *cfg[i].val = cfg_rb->atoi(val);
+                        break;
+                        
+                    case TYPE_ENUM:
+                        for(j = 0;j < cfg[i].max;j++) {
+                            if(!cfg_rb->strcmp(cfg[i].values[j], val)) {
+                                *cfg[i].val = j;
+                            }
+                        }
+                        break;
+                        
+                    case TYPE_STRING:
+                        cfg_rb->strncpy(cfg[i].string, val, cfg[i].max);
+                        break;
+                }
+            }
+        }
+    }
+    
+    cfg_rb->close(fd);
+    return 0;
+}

apps/plugins/lib/configfile.h

@@ -0,0 +1,44 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef CONFIGFILE_H
+#define CONFIGFILE_H
+
+#define TYPE_INT    1
+#define TYPE_ENUM   2
+#define TYPE_STRING 3
+
+struct configdata
+{
+    int type;      /* See TYPE_ macros above */
+    int min;       /* Min value for integers, should be 0 for enums */
+    int max;       /* Max value for enums and integers,
+                      buffer size for strings  */
+    int *val;      /* Pointer to integer/enum value,
+                      NULL if the item is a string */
+    char *name;    /* Pointer to the name of the item */
+    char **values; /* List of strings for enums, NULL if not enum */
+    char *string;  /* Pointer to a string buffer if the item is a string,
+                      NULL otherwise */
+};
+
+void configfile_init(struct plugin_api* newrb);
+int configfile_save(char *filename, struct configdata *cfg, int num_items);
+int configfile_load(char *filename, struct configdata *cfg, int num_items);
+
+#endif