Initial import of qemu-2.4.1HEADmaster

1 files changed, 50 insertions, 0 deletions

diff --git a/roms/openbios/fs/iso9660/iso9660_readdir.c b/roms/openbios/fs/iso9660/iso9660_readdir.c
new file mode 100644
index 00000000..003ffb20
--- /dev/null
+++ b/roms/openbios/fs/iso9660/iso9660_readdir.c
@@ -0,0 +1,50 @@
+/*
+ *
+ * (c) 2005-2009 Laurent Vivier <Laurent@vivier.eu>
+ *
+ * This file has been copied from EMILE, http://emile.sf.net
+ *
+ */
+
+#include "libiso9660.h"
+#include "libopenbios/bindings.h"
+#include "libc/diskio.h"
+
+#define offsetof(t,m)	((long)&(((t *)0)->m))
+
+static void read_extent(iso9660_DIR *dir)
+{
+	seek_io(dir->volume->fd, dir->extent * ISOFS_BLOCK_SIZE);
+	read_io(dir->volume->fd, dir->buffer, ISOFS_BLOCK_SIZE);
+
+	dir->len -= ISOFS_BLOCK_SIZE;
+	dir->extent ++;
+	dir->index = 0;
+}
+
+struct iso_directory_record *iso9660_readdir(iso9660_DIR *dir)
+{
+	struct iso_directory_record *idr;
+
+	if (dir->index >
+	    ISOFS_BLOCK_SIZE - offsetof(struct iso_directory_record, name[0]))
+	{
+		if (dir->len <= 0)
+			return NULL;
+
+		read_extent(dir);
+	}
+
+	idr = (struct iso_directory_record *) &dir->buffer[dir->index];
+	if (idr->length[0] == 0)  {
+		if (dir->len <= 0)
+			return NULL;
+
+		read_extent(dir);
+		idr = (struct iso_directory_record *) &dir->buffer[dir->index];
+	}
+
+	dir->index += dir->buffer[dir->index];
+
+	return idr;
+}