go版本的supervisord
go和python解码msgpack不一致

golang位移操作的一个小坑

妙音 posted @ 2021年11月25日 16:08 in golang , 437 阅读

问题描述

 
    现有int16类型的整数,将它转为两个字节存放。在还原时,一不小心会就被坑了。
 
 

错误用法

 
length := int(keyBytes[cursor] + keyBytes[cursor+1] <<8)
 

正确用法

 
keyBytes := []byte{ 16, 1}
length := int(uint16(keyBytes[cursor]) + uint16(keyBytes[cursor+1]) <<8)
 

错误原因

 
字节byte位移时类型不会自动变化, 先要转换类型再位移。
 
 
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