/// <summary>
///
/// </summary>
/// <param name="source"></param>
/// <param name="addr"></param>
/// <param name="size"></param>
/// <param name="fp"></param>
/// <returns></returns>
public int fwrite(Getable source, int addr, int size, int fp)
{
if ((fp & 0x80) == 0)
{
return(0);
}
fp &= 0x7f;
if (fp >= MAX_FILE_COUNT)
{
return(0);
}
if (usable[fp] || !canWrite[fp])
{
return(0);
}
VirtualFile file = files[fp];
int count = 0, b;
while (count < size)
{
b = source.getByte(addr++);
if (file.putc(b & 0xff) == -1)
{
break;
}
count++;
}
return(count);
}
private string getFileName(Getable src, int addr)
{
string name = getstring(src, addr);
if (!name.StartsWith("/"))
{
name = workDir + name;
}
return(name);
}
public void drawString(int x, int y, Getable source, int addr)
{
int length = 0;
while (source.getByte(addr + length) != 0)
{
length++;
}
drawString(x, y, source, addr, length);
}
public bool makeDir(Getable source, int addr)
{
string dir = getFileName(source, addr);
bool result = fileSys.makeDir(dir);
if (result && isParent(workDir, dir))
{
workDirInf = fileSys.getFileInf(workDir);
}
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="source"></param>
/// <param name="addr"></param>
/// <returns></returns>
public bool deleteFile(Getable source, int addr)
{
string file = getFileName(source, addr);
bool result = fileSys.deleteFile(file);
//如果当前目录信息被修改,重置之
if (result && isParent(workDir, file))
{
workDirInf = fileSys.getFileInf(workDir);
}
return(result);
}
/// <summary>
/// 得到src从addr开始的length个字节的crc16码
/// </summary>
/// <param name="src"></param>
/// <param name="addr"></param>
/// <param name="length"></param>
/// <returns></returns>
public static UInt16 getCrc16Value(Getable src, int addr, int length)
{
UInt16 crc = 0, tmp;
while (--length >= 0)
{
tmp = (UInt16)((crc >> 8) & 0xff);
crc <<= 4;
crc ^= CRC16_TAB[(tmp >> 4) ^ ((src.getByte(addr) & 0xff) >> 4)];
tmp = (UInt16)((crc >> 8) & 0xff);
crc <<= 4;
crc ^= CRC16_TAB[(tmp >> 4) ^ (src.getByte(addr) & 0x0f)];
addr++;
}
return(crc);
}
private string getstring(Getable src, int addr)
{
int length = 0;
sbyte b;
while ((b = src.getByte(addr++)) != 0)
{
strBuf[length++] = b;
}
//try
//{
// return new string(strBuf, 0, length, "gb2312");
//}
//catch (UnsupportedEncodingException uee)
//{
// return new string(strBuf, 0, length);
//}
return(Util.NewString(strBuf, 0, length, Encoding.GetEncoding("gb2312")));
}
public void drawString(int x, int y, Getable source, int addr, int length)
{
//这个调用drawRegion时会修改区域,所以这儿不需要再修改区域
sbyte[] data = isBig ? new sbyte[32] : new sbyte[24];
int h = isBig ? 16 : 12;
Getable getter = Util.asAccessable(data);
while (length > 0)
{
UInt16 c = (UInt16)(source.getByte(addr++) & 0xff);
length--;
if (c >= 0x80 && length > 0)
{
//c |= source.getByte(addr++) << 8;
c |= (UInt16)(source.getByte(addr++) << 8);
length--;
}
int w = (isBig ? Util.getGB16Data(c, data) : Util.getGB12Data(c, data)) / 2;
drawRegion(x, y, w, h, getter, 0);
x += w;
}
}
/// <summary>
/// 设置用于显示的ScreenModel,并作适当的初始化
/// </summary>
/// <param name="screen"></param>
public void setScreenModel(ScreenModel screen)
{
if (screen == null)
{
//throw new IllegalArgumentException("Screen must't be null!");
}
if (this.screen != screen)
{
this.screen = screen;
this.buffer = new sbyte[(screen.getWidth() / 6) * (screen.getHeight() / 13)];
this.getter = new ByteArrayGetter(buffer);
this.ram = new ByteArrayRam(buffer, screen);
this.render = screen.getRender();
}
else
{
ram.Clear();
}
this.curCol = this.curRow = 0;
this.isBigMode = true;
this.maxCol = screen.getWidth() / 8;
this.maxRow = screen.getHeight() / 16;
}
public bool changeDir(Getable source, int addr)
{
int pre = -2;
int length = 0;
sbyte b = 0;
while ((b = source.getByte(addr)) != 0)
{
if (b == '/')
{
if (pre != addr - 1)
{
strBuf[length++] = b;
}
pre = addr;
addr++;
}
else
{
strBuf[length++] = b;
addr++;
}
}
string newDir = null;
try {
//newDir = new string(strBuf, 0, length, "gb2312");
newDir = Util.NewString(strBuf, 0, length, Encoding.GetEncoding("gb2312"));
} catch (Exception uee) {
newDir = Util.NewString(strBuf, 0, length);
}
if (newDir == "..")
{
if (workDir == "/")
{
return(false);
}
int pos = workDir.LastIndexOf('/', workDir.Length - 2) + 1;
workDir = workDir.Substring(0, pos);
workDirInf = fileSys.getFileInf(workDir);
return(true);
}
else
{
if (!newDir.StartsWith("/"))
{
newDir = workDir + newDir;
}
if (!newDir.EndsWith("/"))
{
newDir += "/";
}
if (workDir == newDir)
{
return(true);
}
FileSystemInfo inf = fileSys.getFileInf(newDir);
if (inf.isDirectory())
{
workDir = newDir;
workDirInf = inf;
return(true);
}
else
{
return(false);
}
}
}
public int fopen(Getable source, int fileName, int openMode)
{
int num = -1;
//指示文件指针位置,true开头,false为结尾
bool pointer = true;
//是否清除原有文件
bool clear = false;
for (int index = 0; index < MAX_FILE_COUNT; index++)
{
if (usable[index])
{
num = index;
break;
}
}
if (num == -1)
{
return(0);
}
string name = getFileName(source, fileName);
string mode = getstring(source, openMode);
FileSystemInfo inf = fileSys.getFileInf(name);
if (READ_MODE == mode || READ_B_MODE == mode)
{
if (!(inf.isFile() && inf.canRead()))
{
return(0);
}
canRead[num] = true;
canWrite[num] = false;
}
else if (READ_PLUS_MODE == mode || READ_B_PLUS_MODE == mode)
{
if (!(inf.isFile() && inf.canRead() && inf.canWrite()))
{
return(0);
}
canRead[num] = true;
canWrite[num] = true;
}
else if (WRITE_MODE == mode || WRITE_B_MODE == mode)
{
if (inf.isFile() && !inf.canWrite())
{
return(0);
}
clear = true;
canRead[num] = false;
canWrite[num] = true;
}
else if (WRITE_PLUS_MODE == mode || WRITE_B_PLUS_MODE == mode)
{
if (inf.isFile() && !inf.canWrite())
{
return(0);
}
clear = true;
canRead[num] = true;
canWrite[num] = true;
}
else if (APPEND_MODE == mode || APPEND_B_MODE == mode)
{
if (!(inf.isFile() && inf.canWrite()))
{
return(0);
}
canRead[num] = false;
canWrite[num] = true;
pointer = false;
}
else if (APPEND_PLUS_MODE == mode || APPEND_B_PLUS_MODE == mode)
{
if (!(inf.isFile() && inf.canRead() && inf.canWrite()))
{
return(0);
}
canRead[num] = true;
canWrite[num] = true;
pointer = false;
}
else
{
return(0);
}
VirtualFile file = files[num];
if (clear)
{
file.refresh();
}
else
{
int length = 0;
try {
//InputStream in = fileSys.getInputStream(name);
FileStream inputStream = fileSys.getInputStream(name);
//file.readFromStream(in);
file.readFromStream(inputStream);
length = file.limit();
//in.close();
inputStream.Close();
} catch (Exception ex) {
return(0);
}
file.position(pointer ? 0 : length);
}
fileNames[num] = name;
usable[num] = false;
return(num | 0x80);
}
public void drawRegion(int x, int y, int width, int height, Getable source, int addr)
{
if (width <= 0 || height <= 0)
{
return;
}
if (x >= WIDTH || y >= HEIGHT || x + width < 0 || y + height < 0)
{
return;
}
//每行数据占用byte数
//int bytePerLine = (width + 7) >>> 3;
int bytePerLine = TypeConverter.UnsignedRightMove((width + 7), 3);
//每行开始第一个数据前无用的bit数
int unuseDataBits = 0;
if (x < 0)
{
addr += (-x) / 8;
unuseDataBits = (-x) % 8;
width += x;
x = 0;
}
if (y < 0)
{
addr += -bytePerLine * y;
height += y;
y = 0;
}
if (x + width > WIDTH)
{
width -= x + width - WIDTH;
}
if (y + height > HEIGHT)
{
height -= y + height - HEIGHT;
}
//如果是屏幕绘图,添加到修改区域
if (isGraph)
{
addPoint(x, y);
addPoint(x + width - 1, y + height - 1);
}
//绘制处前无用的bit数
int unuseScreenBits = x % 8;
//绘制开始地址
int offset = BYTES_PER_LINE * y + x / 8;
//实际每行用到数据的byte数
int count = (unuseDataBits + width + 7) / 8;
//实际绘制影响到的byte数
int size = (unuseScreenBits + width + 7) / 8;
//绘制结尾剩下的bit数
int remain = size * 8 - unuseScreenBits - width;
//用于存储图像数据
sbyte[] mapData = new sbyte[count + 1];
while (height-- > 0)
{
for (int index = 0; index < count; index++)
{
mapData[index] = source.getByte(addr + index);
}
addr += bytePerLine;
adjustData(mapData, 0, mapData.Length, unuseDataBits - unuseScreenBits);
for (int index = 0; index < size; index++)
{
int s = mapData[index], d = currData[offset + index];
int mask = 0;
if (index == 0)
{
mask |= maskH[unuseScreenBits];
}
if (index == size - 1)
{
mask |= maskT[remain];
}
if ((drawMode & 0x08) != 0)
{
s ^= 0xff;
if ((drawMode & 0x07) == 2)
{
drawMode &= ~0x07;
}
}
s &= ~mask;
d &= ~mask;
//currData[offset + index] &= mask;//vliu注释掉的
switch (drawMode & 0x07)
{
case 2:
s ^= ~mask;
break;
case 3:
s |= d;
break;
case 4:
s &= d;
break;
case 5:
s ^= d;
break;
}
//currData[offset + index] |= s;//vliu注释掉的
}//for
offset += BYTES_PER_LINE;
}
}
