aboutsummaryrefslogtreecommitdiffstats
path: root/lib/libucsi/descriptor.h
diff options
context:
space:
mode:
authoretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
committeretobi <git@e-tobi.net>2013-09-03 09:48:41 +0200
commitab959d7b4194715870128e616b8e29d4a101e488 (patch)
tree61a746231d30817be73416a7d67763fd677a1042 /lib/libucsi/descriptor.h
parent6b350466c4902c5b137e0efaf1d189128a7f18f5 (diff)
downloadlinux-dvb-apps-ab959d7b4194715870128e616b8e29d4a101e488.tar.gz
Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207
Diffstat (limited to '')
-rw-r--r--lib/libucsi/descriptor.h129
1 files changed, 129 insertions, 0 deletions
diff --git a/lib/libucsi/descriptor.h b/lib/libucsi/descriptor.h
new file mode 100644
index 0000000..606e45d
--- /dev/null
+++ b/lib/libucsi/descriptor.h
@@ -0,0 +1,129 @@
+/*
+ * section and descriptor parser
+ *
+ * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef _UCSI_DESCRIPTOR_H
+#define _UCSI_DESCRIPTOR_H 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/endianops.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/**
+ * Generic descriptor header.
+ */
+struct descriptor {
+ uint8_t tag;
+ uint8_t len;
+} __ucsi_packed;
+
+/**
+ * Retreive pointer to the next descriptor structure.
+ *
+ * @param buf The buffer of descriptors.
+ * @param len Size of the buffer.
+ * @param pos Current descriptor.
+ * @return Pointer to next descriptor, or NULL if there are none.
+ */
+static inline struct descriptor *
+ next_descriptor(uint8_t * buf, size_t len, struct descriptor * pos)
+{
+ uint8_t* next;
+
+ if (pos == NULL)
+ return NULL;
+
+ next = (uint8_t*) pos + 2 + pos->len;
+ if (next >= buf + len)
+ return NULL;
+
+ return (struct descriptor *) next;
+}
+
+
+/**
+ * The unknown descriptor.
+ */
+struct unknown_descriptor {
+ struct descriptor d;
+
+ /* uint8_t data [] */
+} __ucsi_packed;
+
+/**
+ * Retrieve pointer to the unknown descriptor's data field.
+ *
+ * @param d The descriptor.
+ * @return Pointer to the data field.
+ */
+static inline uint8_t *
+ unknown_descriptor_data(struct unknown_descriptor *d)
+{
+ return (uint8_t *) d + sizeof(struct unknown_descriptor);
+}
+
+/**
+ * Retrieve size of unknown descriptor's data field.
+ *
+ * @param d The descriptor.
+ * @return Size of data field in bytes.
+ */
+static inline int
+ unknown_descriptor_data_size(struct unknown_descriptor *d)
+{
+ return d->d.len;
+}
+
+
+
+
+
+
+
+
+
+
+/******************************** PRIVATE CODE ********************************/
+static inline int verify_descriptors(uint8_t * buf, size_t len)
+{
+ size_t pos = 0;
+
+ while (pos < len) {
+ if ((pos + 2) > len)
+ return -1;
+
+ pos += 2 + buf[pos+1];
+ }
+
+ if (pos != len)
+ return -1;
+
+ return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif