session: Add functions for GPSBabel session (format session) management.

diff --git a/session.c b/session.c
new file mode 100644 (file)
index 0000000..a30ccf3
--- /dev/null
+++ b/session.c
@@ -0,0 +1,116 @@
+/*
+
+    GPSBabel session (format session) management
+    Copyright (C) 2008 Olaf Klein, o.b.klein@gpsbabel.org
+
+    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.
+
+    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 USA
+
+ */
+
+#include "defs.h"
+#include "session.h"
+
+static queue session_list;
+static int session_ct;
+
+static void session_free(session_t *s);
+
+void
+session_init(void)
+{
+       QUEUE_INIT(&session_list);
+       session_ct = 0;
+}
+
+void
+session_exit(void)
+{
+       queue *elem, *tmp;
+       
+       QUEUE_FOR_EACH(&session_list, elem, tmp) {
+               session_t *s = (session_t *)elem;
+               dequeue(&s->Q);
+               session_free(s);
+       }
+}
+
+void
+start_session(const char *name, const char *filename)
+{
+       session_t *s;
+       
+       if (session_ct == 0) QUEUE_INIT(&session_list);
+       session_ct++;
+
+       s = xcalloc(1, sizeof(*s));
+       ENQUEUE_TAIL(&session_list, &s->Q);
+       s->nr = session_ct;
+       s->name = name;
+       s->filename = xstrdup(filename);
+}
+
+session_t *
+curr_session(void)
+{
+       return (session_t *) session_list.prev;
+}
+
+/* in work 
+
+int
+session_add_category(const char *name, const int id)
+{
+       queue *elem, *tmp;
+       session_t *s;
+       category_t *c;
+
+       s = curr_session();
+       
+       QUEUE_FOR_EACH(&s->category_list, elem, tmp) {
+               c = (category_t *) elem;
+               if (case_ignore_strcmp(c->name, name) == 0) {
+                       if (id >= 0) c->id = id;
+                       return c->id;
+               }
+               
+       }
+       
+       c = xmalloc(sizeof(*c));
+       c->name = xstrdup(name);
+       if (id < 0) c->id = -(++s->unknown_category_ct);
+       else c->id = id;
+       
+       s->category_ct++;
+       ENQUEUE_TAIL(&s->category_list, &c->Q);
+       
+       return c->id;
+}
+*/
+
+/* non public functions */
+
+static void
+session_free(session_t *s)
+{
+       queue *elem, *tmp;
+       QUEUE_FOR_EACH(&s->category_list, elem, tmp) {
+               category_t *c = (category_t *) elem;
+               dequeue(&c->Q);
+               xfree(c);
+       }
+       xfree(s->filename);
+       xfree(s);
+}
+

diff --git a/session.h b/session.h
new file mode 100644 (file)
index 0000000..85be21f
--- /dev/null
+++ b/session.h
@@ -0,0 +1,51 @@
+/*
+
+    GPSBabel session (format session) management
+    Copyright (C) 2008 Olaf Klein, o.b.klein@gpsbabel.org
+
+    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.
+
+    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 USA
+
+*/
+
+#ifndef SESSION_H
+#define SESSION_H
+
+typedef struct {
+       queue Q;
+       int id;
+       char *name;
+} category_t;
+
+typedef struct {
+       queue Q;
+       int nr;
+       const char *name;               /* in normal case the name of a format */
+       char *filename;                 /* used file within format */
+       int category_ct;
+       int unknown_category_ct;        /* added without id */
+       queue category_list;
+} session_t;
+
+void session_init(void);
+void session_exit(void);
+
+void start_session(const char *name, const char *filename);
+session_t *curr_session(void);
+
+/* in work
+int session_add_category(const char *name, const int id);
+*/
+
+#endif