Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/src/os/dirent_wasip1.go b/src/os/dirent_wasip1.go
new file mode 100644
index 0000000..d3f10b2
--- /dev/null
+++ b/src/os/dirent_wasip1.go
@@ -0,0 +1,52 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build wasip1
+
+package os
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// https://github.com/WebAssembly/WASI/blob/main/legacy/preview1/docs.md#-dirent-record
+const sizeOfDirent = 24
+
+func direntIno(buf []byte) (uint64, bool) {
+	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Ino), unsafe.Sizeof(syscall.Dirent{}.Ino))
+}
+
+func direntReclen(buf []byte) (uint64, bool) {
+	namelen, ok := direntNamlen(buf)
+	return sizeOfDirent + namelen, ok
+}
+
+func direntNamlen(buf []byte) (uint64, bool) {
+	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Namlen), unsafe.Sizeof(syscall.Dirent{}.Namlen))
+}
+
+func direntType(buf []byte) FileMode {
+	off := unsafe.Offsetof(syscall.Dirent{}.Type)
+	if off >= uintptr(len(buf)) {
+		return ^FileMode(0) // unknown
+	}
+	switch syscall.Filetype(buf[off]) {
+	case syscall.FILETYPE_BLOCK_DEVICE:
+		return ModeDevice
+	case syscall.FILETYPE_CHARACTER_DEVICE:
+		return ModeDevice | ModeCharDevice
+	case syscall.FILETYPE_DIRECTORY:
+		return ModeDir
+	case syscall.FILETYPE_REGULAR_FILE:
+		return 0
+	case syscall.FILETYPE_SOCKET_DGRAM:
+		return ModeSocket
+	case syscall.FILETYPE_SOCKET_STREAM:
+		return ModeSocket
+	case syscall.FILETYPE_SYMBOLIC_LINK:
+		return ModeSymlink
+	}
+	return ^FileMode(0) // unknown
+}