MacOS环境-手写操作系统-43-dir命令的实现 和 文件写入

struct FILEINFO {
    unsigned char name[8], ext[3], type;
    char  reserve[10];
    unsigned short time, date, clustno;
    unsigned int  size;
};

0x01 只读文件
0x02 隐藏文件
0x04 系统文件
0x08 非文件信息
0x10 目录

import java.nio.ByteBuffer;


public class FileHeader {
    private byte[] header = new byte[32];

    public void setFileName(String s) {
        int len = s.length() > 8 ? 8 : s.length();
        for (int i = 0; i < len; i++) {
            header[i] = (byte)s.charAt(i);
        }
    }

    public void setFileExt(String s) {
        int len = s.length() > 3 ? 3 : s.length();
        for (int i = 0; i < len; i++) {
            header[8+i] = (byte)s.charAt(i);
        }
    }

    public void setFileType(Byte t) {
        header[11] = t;
    }

    public void setFileTime(byte[] time) {
        header[22] = time[0];
        header[23] = time[1];
    }

    public void setFileDate(byte[] date) {
        header[24] = date[0];
        header[25] = date[1];
    }

    public void setFileClusterNo(byte[] no) {
        header[26] = no[0];
        header[27] = no[1];
    }

    public void setFileSize(int size) {
        byte[] buf = ByteBuffer.allocate(4).putInt(size).array();
        for (int i = 0; i < 4; i++) {
            header[28+i] = buf[3 - i];
        }
    }

    public byte[] getHeaderBuffer() {
        return header;
    }
}

public class DiskFileSystem {
    private Floppy floppyWriter;
    private int beginSec;
    private int fileHeaderCount = 0;
    private byte[] buffer = new byte[512];
    private int cylinder = 0;

    public DiskFileSystem(Floppy disk, int  cylinder, int sec) {
        this.floppyWriter = disk;
        this.beginSec = sec;
        this.cylinder = cylinder;
    }

    public void addHeader(FileHeader header) {
        if (fileHeaderCount >= 16) {
            flashFileHeaders();
            fileHeaderCount = 0;
            buffer = new byte[512];
            beginSec++;
        }

        byte[] headerBuf = header.getHeaderBuffer();
        for (int i = 0; i < 32; i++) {
            buffer[fileHeaderCount * 32 + i] = headerBuf[i];
        }

        fileHeaderCount++;
    }

    public void flashFileHeaders() {
        floppyWriter.writeFloppy(Floppy.MAGNETIC_HEAD.MAGNETIC_HEAD_0 , cylinder, beginSec, buffer);
    }
}

......
Load file kernel.bat to floppy with cylinder: 3 and sector:7
Load file kernel.bat to floppy with cylinder: 3 and sector:8
Load file kernel.bat to floppy with cylinder: 3 and sector:9
Load file kernel.bat to floppy with cylinder: 3 and sector:10
Load file kernel.bat to floppy with cylinder: 3 and sector:11
Load file kernel.bat to floppy with cylinder: 3 and sector:12
Load file kernel.bat to floppy with cylinder: 3 and sector:13
Load file kernel.bat to floppy with cylinder: 3 and sector:14
Load file kernel.bat to floppy with cylinder: 3 and sector:15
Load file kernel.bat to floppy with cylinder: 3 and sector:16
Load file kernel.bat to floppy with cylinder: 3 and sector:17
Load file kernel.bat to floppy with cylinder: 3 and sector:18
Load file kernel.bat to floppy with cylinder: 4 and sector:1
Load file kernel.bat to floppy with cylinder: 4 and sector:2
Load file kernel.bat to floppy with cylinder: 4 and sector:3
Load file kernel.bat to floppy with cylinder: 4 and sector:4
Load file kernel.bat to floppy with cylinder: 4 and sector:5
Load file kernel.bat to floppy with cylinder: 4 and sector:6
Load file kernel.bat to floppy with cylinder: 4 and sector:7
Load file kernel.bat to floppy with cylinder: 4 and sector:8
Load file kernel.bat to floppy with cylinder: 4 and sector:9
Load file kernel.bat to floppy with cylinder: 4 and sector:10

 public void makeFllopy()   {
        writeFileToFloppy("kernel.bat", false, 1, 1);

        //test file system
        // 这里设置文件的存储位置
        DiskFileSystem fileSys = new DiskFileSystem(floppyDisk, 4, 18);
        FileHeader header = new FileHeader();
        header.setFileName("abc");
        header.setFileExt("exe");
        byte[] date = new byte[2];
        date[0] = 0x11;
        date[1] = 0x12;
        header.setFileTime(date);
        header.setFileDate(date);
        header.setFileSize(256);
        fileSys.addHeader(header);

        header = new FileHeader();
        header.setFileName("efg");
        header.setFileExt("sys");
        header.setFileSize(128);
        fileSys.addHeader(header);

        fileSys.flashFileHeaders();

        //test file system

        floppyDisk.makeFloppy("system.img");
    }

#define  ADR_DISKIMG  0x10E00
struct FILEINFO {
    unsigned char name[8], ext[3], type;
    char  reserve[10];
    unsigned short time, date, clustno;
    unsigned int  size;
};

void console_task(struct SHEET *sheet, int memtotal) {
....
struct FILEINFO* finfo = (struct FILEINFO*)(ADR_DISKIMG);

    for(;;) {
    ....
    else if (strcmp(cmdline, "dir") == 1) {
          while (finfo->name[0] != 0) {
            char s[13];
            s[12] = 0;
            int k;
            for (k = 0; k < 8; k++) {
              if (finfo->name[k] != 0) {
                s[k] = finfo->name[k]; 
              }else {
                break;
              }
            }

            int t = 0;
            s[k] = '.';
            k++;
            for (t = 0; t < 3; t++) {
              s[k] = finfo->ext[t];
              k++;
            }

            showString(shtctl, sheet, 16, cursor_y, COL8_FFFFFF, s);
            int offset = 16 + 8*15;
            char* p = intToHexStr(finfo->size);
            showString(shtctl, sheet, offset, cursor_y, COL8_FFFFFF, p);
            cursor_y = cons_newline(cursor_y, sheet);
            finfo++;

          }
    ....
    }
....
}