From d6c9d39c26722d0fe7437bd4ee414fa88d9cf2a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Fri, 15 Nov 2024 13:52:13 +0800
Subject: [PATCH] Add buf.MergeMulti

---
 common/buf/multi.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/common/buf/multi.go b/common/buf/multi.go
index 2d74ab5c..575ddb57 100644
--- a/common/buf/multi.go
+++ b/common/buf/multi.go
@@ -10,6 +10,22 @@ func LenMulti(buffers []*Buffer) int {
 	return n
 }
 
+func MergeMulti(buffers []*Buffer) *Buffer {
+	switch len(buffers) {
+	case 0:
+		panic("empty buffers")
+	case 1:
+		return buffers[0]
+	default:
+		newBuffer := NewSize(LenMulti(buffers))
+		for _, buffer := range buffers {
+			common.Must1(newBuffer.Write(buffer.Bytes()))
+			buffer.Release()
+		}
+		return newBuffer
+	}
+}
+
 func ToSliceMulti(buffers []*Buffer) [][]byte {
 	return common.Map(buffers, func(it *Buffer) []byte {
 		return it.Bytes()