Make Nix builds work

1 files changed, 102 insertions, 0 deletions

diff --git a/vendor/golang.org/x/sys/unix/dirent.go b/vendor/golang.org/x/sys/unix/dirent.go
new file mode 100644
index 0000000..1ebf117
--- /dev/null
+++ b/vendor/golang.org/x/sys/unix/dirent.go
@@ -0,0 +1,102 @@
+// Copyright 2009 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 aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
+
+package unix
+
+import "unsafe"
+
+// readInt returns the size-bytes unsigned integer in native byte order at offset off.
+func readInt(b []byte, off, size uintptr) (u uint64, ok bool) {
+        if len(b) < int(off+size) {
+                return 0, false
+        }
+        if isBigEndian {
+                return readIntBE(b[off:], size), true
+        }
+        return readIntLE(b[off:], size), true
+}
+
+func readIntBE(b []byte, size uintptr) uint64 {
+        switch size {
+        case 1:
+                return uint64(b[0])
+        case 2:
+                _ = b[1] // bounds check hint to compiler; see golang.org/issue/14808
+                return uint64(b[1]) | uint64(b[0])<<8
+        case 4:
+                _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808
+                return uint64(b[3]) | uint64(b[2])<<8 | uint64(b[1])<<16 | uint64(b[0])<<24
+        case 8:
+                _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
+                return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 |
+                        uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56
+        default:
+                panic("syscall: readInt with unsupported size")
+        }
+}
+
+func readIntLE(b []byte, size uintptr) uint64 {
+        switch size {
+        case 1:
+                return uint64(b[0])
+        case 2:
+                _ = b[1] // bounds check hint to compiler; see golang.org/issue/14808
+                return uint64(b[0]) | uint64(b[1])<<8
+        case 4:
+                _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808
+                return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24
+        case 8:
+                _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
+                return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
+                        uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
+        default:
+                panic("syscall: readInt with unsupported size")
+        }
+}
+
+// ParseDirent parses up to max directory entries in buf,
+// appending the names to names. It returns the number of
+// bytes consumed from buf, the number of entries added
+// to names, and the new names slice.
+func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) {
+        origlen := len(buf)
+        count = 0
+        for max != 0 && len(buf) > 0 {
+                reclen, ok := direntReclen(buf)
+                if !ok || reclen > uint64(len(buf)) {
+                        return origlen, count, names
+                }
+                rec := buf[:reclen]
+                buf = buf[reclen:]
+                ino, ok := direntIno(rec)
+                if !ok {
+                        break
+                }
+                if ino == 0 { // File absent in directory.
+                        continue
+                }
+                const namoff = uint64(unsafe.Offsetof(Dirent{}.Name))
+                namlen, ok := direntNamlen(rec)
+                if !ok || namoff+namlen > uint64(len(rec)) {
+                        break
+                }
+                name := rec[namoff : namoff+namlen]
+                for i, c := range name {
+                        if c == 0 {
+                                name = name[:i]
+                                break
+                        }
+                }
+                // Check for useless names before allocating a string.
+                if string(name) == "." || string(name) == ".." {
+                        continue
+                }
+                max--
+                count++
+                names = append(names, string(name))
+        }
+        return origlen - len(buf), count, names
+}