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authorLibravatar Tobi Smethurst <31960611+tsmethurst@users.noreply.github.com>2021-08-12 21:03:24 +0200
committerLibravatar GitHub <noreply@github.com>2021-08-12 21:03:24 +0200
commit98263a7de64269898a2f81207e38943b5c8e8653 (patch)
tree743c90f109a6c5d27832d1dcef2388d939f0f77a /vendor/github.com/gorilla/websocket/mask.go
parentText duplication fix (#137) (diff)
downloadgotosocial-98263a7de64269898a2f81207e38943b5c8e8653.tar.xz
Grand test fixup (#138)
* start fixing up tests * fix up tests + automate with drone * fiddle with linting * messing about with drone.yml * some more fiddling * hmmm * add cache * add vendor directory * verbose * ci updates * update some little things * update sig
Diffstat (limited to 'vendor/github.com/gorilla/websocket/mask.go')
-rw-r--r--vendor/github.com/gorilla/websocket/mask.go54
1 files changed, 54 insertions, 0 deletions
diff --git a/vendor/github.com/gorilla/websocket/mask.go b/vendor/github.com/gorilla/websocket/mask.go
new file mode 100644
index 000000000..577fce9ef
--- /dev/null
+++ b/vendor/github.com/gorilla/websocket/mask.go
@@ -0,0 +1,54 @@
+// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. Use of
+// this source code is governed by a BSD-style license that can be found in the
+// LICENSE file.
+
+// +build !appengine
+
+package websocket
+
+import "unsafe"
+
+const wordSize = int(unsafe.Sizeof(uintptr(0)))
+
+func maskBytes(key [4]byte, pos int, b []byte) int {
+ // Mask one byte at a time for small buffers.
+ if len(b) < 2*wordSize {
+ for i := range b {
+ b[i] ^= key[pos&3]
+ pos++
+ }
+ return pos & 3
+ }
+
+ // Mask one byte at a time to word boundary.
+ if n := int(uintptr(unsafe.Pointer(&b[0]))) % wordSize; n != 0 {
+ n = wordSize - n
+ for i := range b[:n] {
+ b[i] ^= key[pos&3]
+ pos++
+ }
+ b = b[n:]
+ }
+
+ // Create aligned word size key.
+ var k [wordSize]byte
+ for i := range k {
+ k[i] = key[(pos+i)&3]
+ }
+ kw := *(*uintptr)(unsafe.Pointer(&k))
+
+ // Mask one word at a time.
+ n := (len(b) / wordSize) * wordSize
+ for i := 0; i < n; i += wordSize {
+ *(*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&b[0])) + uintptr(i))) ^= kw
+ }
+
+ // Mask one byte at a time for remaining bytes.
+ b = b[n:]
+ for i := range b {
+ b[i] ^= key[pos&3]
+ pos++
+ }
+
+ return pos & 3
+}