add file detection support

Several filetypes can be autodetected. Barebox could make use
of this in several ways:

- Add a command to detect filetypes
- detect arm zImages and uImages to unify the different boot commands
- maybe detect UBI or JFFS2 images to construct parts of the kernel
  command line
- select correct uncompression function based on filetype

This patch adds basic support to detect filetypes.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/include/filetype.h b/include/filetype.h
new file mode 100644
index 0000000000..64d32ef8b0
--- /dev/null
+++ b/include/filetype.h
@@ -0,0 +1,23 @@
+#ifndef __FILE_TYPE_H
+#define __FILE_TYPE_H
+
+/*
+ * List of file types we know
+ */
+enum filetype {
+	filetype_unknown,
+	filetype_arm_zimage,
+	filetype_lzo_compressed,
+	filetype_arm_barebox,
+	filetype_uimage,
+	filetype_ubi,
+	filetype_jffs2,
+	filetype_gzip,
+	filetype_bzip2,
+};
+
+const char *file_type_to_string(enum filetype f);
+enum filetype file_detect_type(void *_buf);
+enum filetype file_name_detect_type(const char *filename);
+
+#endif /* __FILE_TYPE_H */