libsqfs: bring sqfs_file_t in line with stream API

Rename the open function to sqfs_file_open, use an argument for the
return pointer and pass back and error number on failure. Also add
an inermediate function to open an sqfs_file_t using a handle, similar
to the stream API. The get_file_size function is moved to the native
wrappers and some of the implementation is cleaned up a little.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/sqfs/src/io/unix.c b/lib/sqfs/src/io/unix.c
index 2e97394..cac8e55 100644
--- a/lib/sqfs/src/io/unix.c
+++ b/lib/sqfs/src/io/unix.c
@@ -10,6 +10,7 @@
 #include "sqfs/io.h"
 #include "sqfs/error.h"
 
+#include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
@@ -85,3 +86,16 @@ int sqfs_native_file_seek(sqfs_file_handle_t fd,
 
 	return 0;
 }
+
+int sqfs_native_file_get_size(sqfs_file_handle_t hnd, sqfs_u64 *out)
+{
+	struct stat sb;
+
+	if (fstat(hnd, &sb)) {
+		*out = 0;
+		return SQFS_ERROR_IO;
+	}
+
+	*out = sb.st_size;
+	return 0;
+}