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refactor(crc):重构CRC系列算法中对于模式的定义，限制其取值。

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This commit is contained in:
徐涛
2023-07-16 11:45:31 +08:00
parent 732c01e36c
commit 1f99378655
4 changed files with 100 additions and 60 deletions
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40
hash/crc16/crc16.go
View File

@@ -10,18 +10,28 @@ import (
"github.com/howeyc/crc16"
)
type CRC16Mode int
const (
CCITT CRC16Mode = iota
CCITT_FALSE
SCSI
IBM
MBUS
)
// 根据给定的校验表类型生成对应的校验器
func hasherSelect(table string) crc16.Hash16 {
switch table {
case "CCITT":
func hasherSelect(mdoe CRC16Mode) crc16.Hash16 {
switch mdoe {
case CCITT:
return crc16.NewCCITT()
case "CCITT-FALSE":
case CCITT_FALSE:
return crc16.New(crc16.MakeTable(crc16.CCITTFalse))
case "SCSI":
case SCSI:
return crc16.NewSCSI()
case "IBM":
case IBM:
return crc16.NewIBM()
case "MBUS":
case MBUS:
return crc16.New(crc16.MakeTable(crc16.MBUS))
default:
return crc16.NewIBM()
@@ -29,27 +39,27 @@ func hasherSelect(table string) crc16.Hash16 {
}
// 计算给定字节数组的CRC16校验和，返回字节数组
func CRC16(data []byte, table ...string) []byte {
crcTable := append(table, "IBM")
func CRC16(data []byte, mode ...CRC16Mode) []byte {
crcTable := append(mode, IBM)
hasher := hasherSelect(crcTable[0])
hasher.Write(data)
return hasher.Sum(nil)
}
// 计算给定字节数组的CRC16校验和，返回十六进制字符串
func CRC16Hex(data []byte, table ...string) string {
return hex.EncodeToString(CRC16(data, table...))
func CRC16Hex(data []byte, mode ...CRC16Mode) string {
return hex.EncodeToString(CRC16(data, mode...))
}
// 计算指定文件的CRC16校验和，返回字节数组
func SumFile(file string, table ...string) ([]byte, error) {
func SumFile(file string, mode ...CRC16Mode) ([]byte, error) {
f, err := os.Open(file)
if err != nil {
return nil, fmt.Errorf("未能打开指定文件，%w", err)
}
defer f.Close()
crcTable := append(table, "IBM")
crcTable := append(mode, IBM)
hasher := hasherSelect(crcTable[0])
if _, err := io.Copy(hasher, f); err != nil {
return nil, fmt.Errorf("未能读取指定文件的内容，%w", err)
@@ -58,8 +68,8 @@ func SumFile(file string, table ...string) ([]byte, error) {
}
// 计算指定文件的CRC16校验和，返回十六进制字符串
func SumFileHex(file string, table ...string) (string, error) {
hash, err := SumFile(file, table...)
func SumFileHex(file string, mode ...CRC16Mode) (string, error) {
hash, err := SumFile(file, mode...)
if err != nil {
return "", err
}

34
hash/crc32/crc32.go
View File

@@ -9,14 +9,22 @@ import (
"os"
)
type CRC32Mode int
const (
IEEE CRC32Mode = iota
Castagnoli
Koopman
)
// 选择一个CRC32校验表
func tableSelect(table string) *crc32.Table {
switch table {
case "IEEE":
func tableSelect(mode CRC32Mode) *crc32.Table {
switch mode {
case IEEE:
return crc32.IEEETable
case "Castagnoli":
case Castagnoli:
return crc32.MakeTable(crc32.Castagnoli)
case "Koopman":
case Koopman:
return crc32.MakeTable(crc32.Koopman)
default:
return crc32.IEEETable
@@ -24,27 +32,27 @@ func tableSelect(table string) *crc32.Table {
}
// 计算给定字节数组的CRC32校验和，返回字节数组
func CRC32(data []byte, table ...string) []byte {
crcTable := append(table, "IEEE")
func CRC32(data []byte, mode ...CRC32Mode) []byte {
crcTable := append(mode, IEEE)
hasher := crc32.New(tableSelect(crcTable[0]))
hasher.Write(data)
return hasher.Sum(nil)
}
// 计算给定字节数组的CRC32校验和，返回十六进制字符串
func CRC32Hex(data []byte, table ...string) string {
return hex.EncodeToString(CRC32(data, table...))
func CRC32Hex(data []byte, mode ...CRC32Mode) string {
return hex.EncodeToString(CRC32(data, mode...))
}
// 计算指定文件的CRC32校验和，返回字节数组
func SumFile(file string, table ...string) ([]byte, error) {
func SumFile(file string, mode ...CRC32Mode) ([]byte, error) {
f, err := os.Open(file)
if err != nil {
return nil, fmt.Errorf("未能打开指定文件，%w", err)
}
defer f.Close()
crcTable := append(table, "IEEE")
crcTable := append(mode, IEEE)
hasher := crc32.New(tableSelect(crcTable[0]))
if _, err := io.Copy(hasher, f); err != nil {
return nil, fmt.Errorf("未能读取指定文件的内容，%w", err)
@@ -53,8 +61,8 @@ func SumFile(file string, table ...string) ([]byte, error) {
}
// 计算指定文件的CRC32校验和，返回十六进制字符串
func SumFileHex(file string, table ...string) (string, error) {
hash, err := SumFile(file, table...)
func SumFileHex(file string, mode ...CRC32Mode) (string, error) {
hash, err := SumFile(file, mode...)
if err != nil {
return "", err
}

31
hash/crc64/crc64.go
View File

@@ -9,12 +9,19 @@ import (
"os"
)
type CRC64Mode int
const (
ECMA CRC64Mode = iota
ISO
)
// 选择一个CRC64校验表。
func tableSelect(table string) *crc64.Table {
switch table {
case "ECMA":
func tableSelect(mode CRC64Mode) *crc64.Table {
switch mode {
case ECMA:
return crc64.MakeTable(crc64.ECMA)
case "ISO":
case ISO:
return crc64.MakeTable(crc64.ISO)
default:
return crc64.MakeTable(crc64.ISO)
@@ -22,27 +29,27 @@ func tableSelect(table string) *crc64.Table {
}
// 计算给定字节数组的CRC64校验和，返回字节数组。
func CRC64(data []byte, table ...string) []byte {
crcTable := append(table, "ISO")
func CRC64(data []byte, mode ...CRC64Mode) []byte {
crcTable := append(mode, ISO)
hasher := crc64.New(tableSelect(crcTable[0]))
hasher.Write(data)
return hasher.Sum(nil)
}
// 计算给定字节数组的CRC64校验和，返回十六进制字符串。
func CRC64Hex(data []byte, table ...string) string {
return hex.EncodeToString(CRC64(data, table...))
func CRC64Hex(data []byte, mode ...CRC64Mode) string {
return hex.EncodeToString(CRC64(data, mode...))
}
// 计算一个指定文件的CRC64校验和，返回字节数组。
func SumFile(file string, table ...string) ([]byte, error) {
func SumFile(file string, mode ...CRC64Mode) ([]byte, error) {
f, err := os.Open(file)
if err != nil {
return nil, fmt.Errorf("未能打开指定文件，%w", err)
}
defer f.Close()
crcTable := append(table, "ISO")
crcTable := append(mode, ISO)
hasher := crc64.New(tableSelect(crcTable[0]))
if _, err := io.Copy(hasher, f); err != nil {
return nil, fmt.Errorf("未能读取指定文件的内容，%w", err)
@@ -51,8 +58,8 @@ func SumFile(file string, table ...string) ([]byte, error) {
}
// 计算一个指定文件的CRC64校验和，返回十六进制字符串。
func SumFileHex(file string, table ...string) (string, error) {
hash, err := SumFile(file, table...)
func SumFileHex(file string, mode ...CRC64Mode) (string, error) {
hash, err := SumFile(file, mode...)
if err != nil {
return "", err
}

55
hash/crc8/crc8.go
View File

@@ -9,28 +9,43 @@ import (
"github.com/sigurn/crc8"
)
type CRC8Mode int
const (
ORIGIN CRC8Mode = iota
CDMA2000
DARC
DVB_S2
EBU
I_CODE
ITU
MAXIM
ROHC
WCDMA
)
// 根据提供的校验表名称生成对应的校验表
func hasherSelect(table string) *crc8.Table {
switch table {
case "CRC8":
func hasherSelect(mode CRC8Mode) *crc8.Table {
switch mode {
case ORIGIN:
return crc8.MakeTable(crc8.CRC8)
case "CDMA2000":
case CDMA2000:
return crc8.MakeTable(crc8.CRC8_CDMA2000)
case "DARC":
case DARC:
return crc8.MakeTable(crc8.CRC8_DARC)
case "DVB-S2":
case DVB_S2:
return crc8.MakeTable(crc8.CRC8_DVB_S2)
case "EBU":
case EBU:
return crc8.MakeTable(crc8.CRC8_EBU)
case "I-CODE":
case I_CODE:
return crc8.MakeTable(crc8.CRC8_I_CODE)
case "ITU":
case ITU:
return crc8.MakeTable(crc8.CRC8_ITU)
case "MAXIM":
case MAXIM:
return crc8.MakeTable(crc8.CRC8_MAXIM)
case "ROHC":
case ROHC:
return crc8.MakeTable(crc8.CRC8_ROHC)
case "WCDMA":
case WCDMA:
return crc8.MakeTable(crc8.CRC8_WCDMA)
default:
return crc8.MakeTable(crc8.CRC8)
@@ -38,25 +53,25 @@ func hasherSelect(table string) *crc8.Table {
}
// 计算给定字节数组的CRC8校验和，返回字节数组
func CRC8(data []byte, table ...string) []byte {
crcTable := append(table, "CRC8")
func CRC8(data []byte, mode ...CRC8Mode) []byte {
crcTable := append(mode, ORIGIN)
return []byte{crc8.Checksum(data, hasherSelect(crcTable[0]))}
}
// 计算给定字节数组的CRC8校验和，返回十六进制字符串
func CRC8Hex(data []byte, table ...string) string {
return hex.EncodeToString(CRC8(data, table...))
func CRC8Hex(data []byte, mode ...CRC8Mode) string {
return hex.EncodeToString(CRC8(data, mode...))
}
// 计算指定文件的CRC8校验和，返回字节数组
func SumFile(file string, table ...string) ([]byte, error) {
func SumFile(file string, mode ...CRC8Mode) ([]byte, error) {
f, err := os.Open(file)
if err != nil {
return nil, fmt.Errorf("未能打开指定文件，%w", err)
}
defer f.Close()
crcTable := append(table, "CRC8")
crcTable := append(mode, ORIGIN)
var buf = make([]byte, 0)
if _, err := f.Read(buf); err != nil {
return nil, fmt.Errorf("读取指定文件内容出错，%w", err)
@@ -65,8 +80,8 @@ func SumFile(file string, table ...string) ([]byte, error) {
}
// 计算指定文件的CRC8校验和，返回十六进制字符串
func SumFileHex(file string, table ...string) (string, error) {
crc, err := SumFile(file, table...)
func SumFileHex(file string, mode ...CRC8Mode) (string, error) {
crc, err := SumFile(file, mode...)
if err != nil {
return "", err
}