hoteas
b43f968b6c
- 在应用程序中新增对达梦数据库（DM）的配置和连接支持 - 实现 SetDmDB 函数以配置达梦数据库连接 - 更新数据库操作逻辑，支持达梦特有的 SQL 语法和功能 - 在相关文件中添加达梦数据库的处理逻辑，包括表创建、数据插入和查询 - 更新 go.mod 和 go.sum 文件以引入达梦数据库驱动 - 增强文档，详细说明达梦数据库的配置和使用方法
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package catmsg
|
|
|
|
// This file implements varint encoding analogous to the one in encoding/binary.
|
|
// We need a string version of this function, so we add that here and then add
|
|
// the rest for consistency.
|
|
|
|
import "errors"
|
|
|
|
var (
|
|
errIllegalVarint = errors.New("catmsg: illegal varint")
|
|
errVarintTooLarge = errors.New("catmsg: varint too large for uint64")
|
|
)
|
|
|
|
const maxVarintBytes = 10 // maximum length of a varint
|
|
|
|
// encodeUint encodes x as a variable-sized integer into buf and returns the
|
|
// number of bytes written. buf must be at least maxVarintBytes long
|
|
func encodeUint(buf []byte, x uint64) (n int) {
|
|
for ; x > 127; n++ {
|
|
buf[n] = 0x80 | uint8(x&0x7F)
|
|
x >>= 7
|
|
}
|
|
buf[n] = uint8(x)
|
|
n++
|
|
return n
|
|
}
|
|
|
|
func decodeUintString(s string) (x uint64, size int, err error) {
|
|
i := 0
|
|
for shift := uint(0); shift < 64; shift += 7 {
|
|
if i >= len(s) {
|
|
return 0, i, errIllegalVarint
|
|
}
|
|
b := uint64(s[i])
|
|
i++
|
|
x |= (b & 0x7F) << shift
|
|
if b&0x80 == 0 {
|
|
return x, i, nil
|
|
}
|
|
}
|
|
return 0, i, errVarintTooLarge
|
|
}
|
|
|
|
func decodeUint(b []byte) (x uint64, size int, err error) {
|
|
i := 0
|
|
for shift := uint(0); shift < 64; shift += 7 {
|
|
if i >= len(b) {
|
|
return 0, i, errIllegalVarint
|
|
}
|
|
c := uint64(b[i])
|
|
i++
|
|
x |= (c & 0x7F) << shift
|
|
if c&0x80 == 0 {
|
|
return x, i, nil
|
|
}
|
|
}
|
|
return 0, i, errVarintTooLarge
|
|
}
|