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[efi] Provide efi_devpath_len()

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-09-10 23:22:43 +01:00
parent 4a7d691697
commit 7107334391
6 changed files with 19 additions and 17 deletions
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12
src/interface/efi/efi_utils.c
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@@ -50,6 +50,18 @@ EFI_DEVICE_PATH_PROTOCOL * efi_devpath_end ( EFI_DEVICE_PATH_PROTOCOL *path ) {
return path;
}
/**
* Find length of device path (excluding terminator)
*
* @v path Path to device
* @ret path_len Length of device path
*/
size_t efi_devpath_len ( EFI_DEVICE_PATH_PROTOCOL *path ) {
EFI_DEVICE_PATH_PROTOCOL *end = efi_devpath_end ( path );
return ( ( ( void * ) end ) - ( ( void * ) path ) );
}
/**
* Locate parent device supporting a given protocol
*