package main

import (
	"encoding/binary"
	"fmt"
	"io"
	"os"
)
// Powered by 黄林杰 15658655447
// Usered for parser oracle datafile header block 1 ....
// oracle 数据文件头块解析
// KCBlockStruct represents the structure of the Oracle block
type KCBlockStruct struct {
	TypeKCBH    byte
	FrmtKCBH    byte
	RDBAKCBH    uint32
	ChkvalKCBH  uint16
	KCCFHDBI    uint32
	KCCFHDBNX   []byte
	KCCFHCSQ    uint32
	KCCFHFSZ    uint32
	KCCFHFNO    uint16
	KCCFHTYP    uint16
	KCVFHRDB    uint32
	KSCNBAS     uint32
	KSCNWRP     uint16
	KCVFHCRT    uint32
	KCVFHRLC    uint32
	KCVFHRLS    struct {
		KSCNBAS uint32
		KSCNWRP uint16
	}
	KCVFHBSBSC  struct {
		KSCNBAS uint32
		KSCNWRP uint16
	}
	KCVFHSTA    uint16
	KCVFHCPC    uint32
	KCVFHCCC    uint32
	KCVFHTSN    uint32
	KCVFHTLN    uint16
	KCVFHTNM    [30]byte
	KCVFHPRC    uint32
	KCVFHPRS    struct {
		KSCNBAS uint32
		KSCNWRP uint16
	}
	KCVCPSN     struct {
		KSCNBAS uint32
		KSCNWRP uint16
	}
	KCVCPTime   uint32
	KCVCPThr    uint16
	KCVCPRA     struct {
		KCRBASEQ uint32
		KCRBABNO uint32
		KCRBABOF uint32
	}
	// Add more fields based on your structure
}

func main() {
	// Open the Oracle data file
	file, err := os.Open("C:\\Users\\ZMI\\Desktop\\asm-diskb\\newoasm\\SYSTEM.260.1096299059.dbf")
	if err != nil {
		fmt.Println("Error opening file:", err)
		return
	}
	defer file.Close()

	// Read the first block (assuming 8192 bytes)
	blockSize := 8192
	block := make([]byte, blockSize)
	// 指定要读取的块号
	blockNumber := 1

	// 计算块的偏移量
	blockOffset := blockSize * blockNumber

	// 移动文件指针到块的起始位置
	_, err = file.Seek(int64(blockOffset), io.SeekStart)
	if err != nil {
		fmt.Println("Error seeking to block:", err)
		return
	}



	_, err = file.Read(block)
	if err != nil {
		fmt.Println("Error reading file:", err)
		return
	}
	hexString := fmt.Sprintf("%X", block)

	// 打印结果
	fmt.Println("oracle 8kb  block Hexadecimal representation:", hexString)


	// Parse the block using the defined structure
	kcBlock := parseKCBlock(block)

	// Print the extracted information
	fmt.Printf("TypeKCBH: %X\n", kcBlock.TypeKCBH)
	fmt.Printf("FrmtKCBH: %X\n", kcBlock.FrmtKCBH)
	fmt.Printf("RDBAKCBH: %X\n", kcBlock.RDBAKCBH)
	// Print more fields as needed
	fmt.Printf("KCCFHDBI: %d\n", kcBlock.KCCFHDBI)
	fmt.Printf("KCCFHDBNX: %s\n", kcBlock.KCCFHDBNX)
}

func parseKCBlock(block []byte) KCBlockStruct {
	kcBlock := KCBlockStruct{
		TypeKCBH: block[0],
		FrmtKCBH: block[1],
		RDBAKCBH: binary.LittleEndian.Uint32(block[4:8]),
		// Parse more fields based on your structure
		KCCFHDBI: binary.LittleEndian.Uint32(block[28:32]),
		KCCFHDBNX: block[32:40],
	}
	return kcBlock
}

##代码执行结果：