Refactor ZOOM event, hide more definitions

[yaz-moved-to-github.git] / src / zoom-event.c

diff --git a/src/zoom-event.c b/src/zoom-event.c
new file mode 100644 (file)
index 0000000..bc1c84e
--- /dev/null
+++ b/src/zoom-event.c
@@ -0,0 +1,115 @@
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2010 Index Data
+ * See the file LICENSE for details.
+ */
+/**
+ * \file zoom-event.c
+ * \brief Implements ZOOM Event stuff
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include "zoom-p.h"
+
+ZOOM_API(const char *) ZOOM_get_event_str(int event)
+{
+    static const char *ar[] = {
+        "NONE",
+        "CONNECT",
+        "SEND_DATA",
+        "RECV_DATA",
+        "TIMEOUT",
+        "UNKNOWN",
+        "SEND_APDU",
+        "RECV_APDU",
+        "RECV_RECORD",
+        "RECV_SEARCH",
+        "END"
+    };
+    return ar[event];
+}
+
+struct ZOOM_Event_p {
+    int kind;
+    ZOOM_Event next;
+    ZOOM_Event prev;
+};
+
+ZOOM_Event ZOOM_Event_create(int kind)
+{
+    ZOOM_Event event = (ZOOM_Event) xmalloc(sizeof(*event));
+    event->kind = kind;
+    event->next = 0;
+    event->prev = 0;
+    return event;
+}
+
+
+ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
+{
+    ZOOM_Event event = c->m_queue_front;
+    if (!event)
+    {
+        c->last_event = ZOOM_EVENT_NONE;
+        return 0;
+    }
+    assert(c->m_queue_back);
+    c->m_queue_front = event->prev;
+    if (c->m_queue_front)
+    {
+        assert(c->m_queue_back);
+        c->m_queue_front->next = 0;
+    }
+    else
+        c->m_queue_back = 0;
+    c->last_event = event->kind;
+    return event;
+}
+
+void ZOOM_connection_put_event(ZOOM_connection c, ZOOM_Event event)
+{
+    if (c->m_queue_back)
+    {
+        c->m_queue_back->prev = event;
+        assert(c->m_queue_front);
+    }
+    else
+    {
+        assert(!c->m_queue_front);
+        c->m_queue_front = event;
+    }
+    event->next = c->m_queue_back;
+    event->prev = 0;
+    c->m_queue_back = event;
+}
+
+void ZOOM_Event_destroy(ZOOM_Event event)
+{
+    xfree(event);
+}
+
+void ZOOM_connection_remove_events(ZOOM_connection c)
+{
+    ZOOM_Event event;
+    while ((event = ZOOM_connection_get_event(c)))
+        ZOOM_Event_destroy(event);
+}
+
+ZOOM_API(int) ZOOM_connection_peek_event(ZOOM_connection c)
+{
+    ZOOM_Event event = c->m_queue_front;
+
+    return event ? event->kind : ZOOM_EVENT_NONE;
+}
+
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+