Initial QSfera import

Server/vendor/github.com/valyala/fastjson/util.go

@@ -0,0 +1,30 @@
+package fastjson
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+func b2s(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}
+
+func s2b(s string) (b []byte) {
+	strh := (*reflect.StringHeader)(unsafe.Pointer(&s))
+	sh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
+	sh.Data = strh.Data
+	sh.Len = strh.Len
+	sh.Cap = strh.Len
+	return b
+}
+
+const maxStartEndStringLen = 80
+
+func startEndString(s string) string {
+	if len(s) <= maxStartEndStringLen {
+		return s
+	}
+	start := s[:40]
+	end := s[len(s)-40:]
+	return start + "..." + end
+}