1 files changed, 63 insertions, 0 deletions
diff --git a/include/iso9660.h b/include/iso9660.h
new file mode 100644
index 0000000..437d6a8
--- /dev/null
+++ b/include/iso9660.h
@@ -0,0 +1,63 @@
+/*
+ * No copyright is claimed.  This code is in the public domain; do with
+ * it what you wish.
+ */
+#ifndef UTIL_LINUX_ISO_H
+#define UTIL_LINUX_ISO_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "c.h"
+
+static inline uint16_t isonum_721(const unsigned char *p)
+{
+	return ((p[0] & 0xff)
+		| ((p[1] & 0xff) << 8));
+}
+
+static inline uint16_t isonum_722(const unsigned char *p)
+{
+	return ((p[1] & 0xff)
+		| ((p[0] & 0xff) << 8));
+}
+
+static inline uint16_t isonum_723(const unsigned char *p, bool check_match)
+{
+	uint16_t le = isonum_721(p);
+	uint16_t be = isonum_722(p + 2);
+
+	if (check_match && le != be)
+		/* translation is useless */
+		warnx("723error: le=%d be=%d", le, be);
+	return (le);
+}
+
+static inline uint32_t isonum_731(const unsigned char *p)
+{
+	return ((p[0] & 0xff)
+		| ((p[1] & 0xff) << 8)
+		| ((p[2] & 0xff) << 16)
+		| (((uint32_t) p[3] & 0xff) << 24));
+}
+
+static inline uint32_t isonum_732(const unsigned char *p)
+{
+	return ((p[3] & 0xff)
+		| ((p[2] & 0xff) << 8)
+		| ((p[1] & 0xff) << 16)
+		| (((uint32_t) p[0] & 0xff) << 24));
+}
+
+static inline uint32_t isonum_733(const unsigned char *p, bool check_match)
+{
+	uint32_t le = isonum_731(p);
+	uint32_t be = isonum_732(p + 4);
+
+	if (check_match && le != be)
+		/* translation is useless */
+		warnx("733error: le=%d be=%d", le, be);
+	return(le);
+}
+
+#endif