init: v1.0.0

internal/utils.go

@@ -0,0 +1,25 @@
+package internal
+
+import "runtime"
+
+// GetFuncName get function's name
+func GetFuncName() string {
+	pc := make([]uintptr, 1)
+	runtime.Callers(2, pc)
+	f := runtime.FuncForPC(pc[0])
+	return f.Name()
+}
+
+// sliceForAppend extends the input slice by n bytes. head is the full extended
+// slice, while tail is the appended part. If the original slice has sufficient
+// capacity no allocation is performed.
+func SliceForAppend(in []byte, n int) (head, tail []byte) {
+	if total := len(in) + n; cap(in) >= total {
+		head = in[:total]
+	} else {
+		head = make([]byte, total)
+		copy(head, in)
+	}
+	tail = head[len(in):]
+	return
+}