Author: imp Date: Fri Oct 6 12:20:24 2017 New Revision: 324359 URL: https://svnweb.freebsd.org/changeset/base/324359
Log: Add efi_devpath_is_prefix efi_devpath_is_prefix determines if a path matches a passed-in prefix. Differential Revision: https://reviews.freebsd.org/D12564 Submitted by: Eric McCorkle Modified: head/sys/boot/efi/include/efilib.h head/sys/boot/efi/libefi/devpath.c Modified: head/sys/boot/efi/include/efilib.h ============================================================================== --- head/sys/boot/efi/include/efilib.h Fri Oct 6 11:48:09 2017 (r324358) +++ head/sys/boot/efi/include/efilib.h Fri Oct 6 12:20:24 2017 (r324359) @@ -82,6 +82,7 @@ EFI_HANDLE efi_devpath_handle(EFI_DEVICE_PATH *); EFI_DEVICE_PATH *efi_devpath_last_node(EFI_DEVICE_PATH *); EFI_DEVICE_PATH *efi_devpath_trim(EFI_DEVICE_PATH *); bool efi_devpath_match(EFI_DEVICE_PATH *, EFI_DEVICE_PATH *); +int efi_devpath_is_prefix(EFI_DEVICE_PATH *, EFI_DEVICE_PATH *); CHAR16 *efi_devpath_name(EFI_DEVICE_PATH *); void efi_free_devpath_name(CHAR16 *); Modified: head/sys/boot/efi/libefi/devpath.c ============================================================================== --- head/sys/boot/efi/libefi/devpath.c Fri Oct 6 11:48:09 2017 (r324358) +++ head/sys/boot/efi/libefi/devpath.c Fri Oct 6 12:20:24 2017 (r324359) @@ -166,3 +166,32 @@ efi_devpath_match(EFI_DEVICE_PATH *devpath1, EFI_DEVIC } return (true); } + +int +efi_devpath_is_prefix(EFI_DEVICE_PATH *prefix, EFI_DEVICE_PATH *path) +{ + int len; + + if (prefix == NULL || path == NULL) + return (0); + + while (1) { + if (IsDevicePathEnd(prefix)) + break; + + if (DevicePathType(prefix) != DevicePathType(path) || + DevicePathSubType(prefix) != DevicePathSubType(path)) + return (0); + + len = DevicePathNodeLength(prefix); + if (len != DevicePathNodeLength(path)) + return (0); + + if (memcmp(prefix, path, (size_t)len) != 0) + return (0); + + prefix = NextDevicePathNode(prefix); + path = NextDevicePathNode(path); + } + return (1); +} _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
