std::tuple<size_t, IOEvent> read_until_event(IInputStream& is, IOutputStream& os) {
if (os.is_write_nonblocking()) {
raise<IOError>("read_until_event will lose data if writing to non-blocking socket. Use a buffered approach instead.");
}
bool reading = true;
size_t total_read = 0;
size_t total_written = 0;
IOEvent reason;
byte buffer[1024];
while (reading) {
auto r = is.read(buffer, 1024);
either_switch(r,
[&](size_t n) {
total_written += n;
either_switch(os.write(buffer, n),
[&](size_t written) {
total_written += written;
},
[&](IOEvent wev) {
reason = wev;
reading = false;
}
);
},
[&](IOEvent event) {
reason = event;
reading = false;
}
);
}
return {total_written, reason};
}
void TBmpFileGray8Base::save_copy_line(IOutputStream& aOutputStream,const void* pixelsLine)const {
long BmpByteWidth=this->get_bmp_byte_width();
long pixelsWidth=this->get_width();
aOutputStream.write(pixelsLine,pixelsWidth);
if (pixelsWidth<BmpByteWidth)
aOutputStream.skip_fill(BmpByteWidth-pixelsWidth);
}
ECode UriCodec::Decode(
/* [in] */ const String& s,
/* [in] */ Boolean convertPlus,
/* [in] */ ICharset* charset,
/* [in] */ Boolean throwOnFailure,
/* [out] */ String* decodedString)
{
VALIDATE_NOT_NULL(decodedString);
if (s.IndexOf('%') == -1 && (!convertPlus || s.IndexOf('+') == -1)) {
*decodedString = s;
return NOERROR;
}
StringBuilder result(s.GetByteLength());
AutoPtr<IByteArrayOutputStream> out;
CByteArrayOutputStream::New((IByteArrayOutputStream**)&out);
IOutputStream* os = IOutputStream::Probe(out);
AutoPtr<ArrayOf<Char32> > char32Array = s.GetChars();
for (Int32 i = 0; i < s.GetLength();) {
Char32 c = (*char32Array)[i];
if (c == '%') {
do {
Int32 d1, d2;
if (i + 2 < s.GetLength()
&& (d1 = HexToInt((*char32Array)[i + 1])) != -1
&& (d2 = HexToInt((*char32Array)[i + 2])) != -1) {
os->Write((Byte) ((d1 << 4) + d2));
}
else if (throwOnFailure) {
return E_ILLEGAL_ARGUMENT_EXCEPTION;
}
else {
// TODO: unicode escape
const char* chars = "\ufffd";
AutoPtr<ArrayOf<Byte> > replacement = GetBytes(chars, charset);
os->Write(replacement, 0, replacement->GetLength());
}
i += 3;
} while (i < s.GetLength() && (*char32Array)[i] == '%');
AutoPtr<ArrayOf<Byte> > bytes;
out->ToByteArray((ArrayOf<Byte>**)&bytes);
//result.append(new String(out.toByteArray(), charset);
result.Append(String((char*)bytes->GetPayload()));
out->Reset();
}
else {
if (convertPlus && c == '+') {
c = ' ';
}
result.AppendChar(c);
i++;
}
}
*decodedString = result.ToString();
return NOERROR;
}
void TBmpFileBase::save_to(IOutputStream& aOutputStream) const
{
long BmpByteWidth=this->get_bmp_byte_width();
WORD bfType=csBmpTag;
//写入类型信息
aOutputStream.write(&bfType, sizeof(bfType));
//填充BITMAPFILEHEADER结构
BITMAPFILEHEADER_NO_TYPE bmFileHeader;//位图文件头结构和位图信息结构
memset(&bmFileHeader,0,sizeof(bmFileHeader));
DWORD dwDibBitsSize=this->get_height()*MyBase::abs(BmpByteWidth);
DWORD dwOffBits =sizeof(bfType)+ sizeof(BITMAPFILEHEADER_NO_TYPE) + sizeof(BITMAPINFOHEADER) +this->get_palette_byte_size();
DWORD dwFileSize = dwOffBits - dwDibBitsSize;
bmFileHeader.bfSize = dwFileSize;
bmFileHeader.bfReserved1 = 0;
bmFileHeader.bfReserved2 = 0;
bmFileHeader.bfOffBits = dwOffBits;
//写入文件头和位图信息
aOutputStream.write(&bmFileHeader, sizeof(BITMAPFILEHEADER_NO_TYPE));
//
BITMAPINFOHEADER bmpInfo;
memset(&bmpInfo,0,sizeof(bmpInfo));
bmpInfo.biSize= sizeof(BITMAPINFOHEADER);
bmpInfo.biWidth=this->get_width();
bmpInfo.biHeight=this->get_height();
bmpInfo.biPlanes=1;
bmpInfo.biBitCount=(WORD)this->get_bmp_bit_count();
bmpInfo.biCompression=0;
bmpInfo.biSizeImage=0;
bmpInfo.biXPelsPerMeter=0;
bmpInfo.biYPelsPerMeter=0;
bmpInfo.biClrUsed=0;
bmpInfo.biClrImportant=0;
aOutputStream.write(&bmpInfo, sizeof(BITMAPINFOHEADER));
this->write_palette(aOutputStream);
//写入数据
for (long y=bmpInfo.biHeight-1; y>=0; --y)
save_copy_line(aOutputStream,this->get_pixels_line(y));
}
Boolean FileUtils::CopyToFile(
/* [in] */ IInputStream* inputStream,
/* [in] */ IFile* destFile)
{
if (inputStream == NULL || destFile == NULL) {
return FALSE;
}
Boolean result = FALSE;
Boolean temp;
destFile->Exists(&temp);
if (temp) {
destFile->Delete(&temp);
}
AutoPtr<IFileDescriptor> fd;
AutoPtr<ArrayOf<Byte> > buffer;
Int32 bytesRead;
IOutputStream* os;
AutoPtr<IFileOutputStream> out;
ECode ec = CFileOutputStream::New(destFile, (IFileOutputStream**)&out);
FAIL_GOTO(ec, _EXIT_);
os = IOutputStream::Probe(out);
buffer = ArrayOf<Byte>::Alloc(4096);
while (inputStream->Read(buffer, &bytesRead), bytesRead >= 0) {
os->Write(buffer, 0, bytesRead);
}
IFlushable::Probe(out)->Flush();
out->GetFD((IFileDescriptor**)&fd);
fd->Sync();
result = TRUE;
_EXIT_:
if (out) {
ICloseable::Probe(out)->Close();
}
return result;
}
void write(IOutputStream& out, const void* data, size_t size) {
while (size > 0) {
size_t writtenSize = out.writeSome(data, size);
if (writtenSize == 0) {
throw std::runtime_error("Failed to write to IOutputStream");
}
data = static_cast<const uint8_t*>(data) + writtenSize;
size -= writtenSize;
}
}
ECode FileUtils::ReadTextFile(
/* [in] */ IFile* file,
/* [in] */ Int32 max,
/* [in] */ const String& ellipsis,
/* [out] */ String* result)
{
VALIDATE_NOT_NULL(result);
*result = String("");
VALIDATE_NOT_NULL(file);
AutoPtr<IInputStream> input;
AutoPtr<IBufferedInputStream> bis;
Int64 size;
Int32 length;
AutoPtr<ArrayOf<Byte> > data, last, tmp;
Boolean rolled = FALSE;
AutoPtr<IByteArrayOutputStream> contents;
IInputStream* is;
IOutputStream* os;
ECode ec = CFileInputStream::New(file, (IInputStream**)&input);
FAIL_GOTO(ec, _EXIT_);
// wrapping a BufferedInputStream around it because when reading /proc with unbuffered
// input stream, bytes read not equal to buffer size is not necessarily the correct
// indication for EOF; but it is true for BufferedInputStream due to its implementation.
ec = CBufferedInputStream::New(input, (IBufferedInputStream**)&bis);
FAIL_GOTO(ec, _EXIT_);
is = IInputStream::Probe(bis);
file->GetLength(&size);
if (max > 0 || (size > 0 && max == 0)) { // "head" mode: read the first N bytes
if (size > 0 && (max == 0 || size < max)) max = (Int32) size;
data = ArrayOf<Byte>::Alloc(max + 1);
is->Read(data, &length);
if (length <= 0) {
*result = String("");
}
else if (length <= max) {
*result = String((const char *)(data->GetPayload()), length);
}
else if (ellipsis.IsNull()) {
*result = String((const char *)(data->GetPayload()), max);
}
else {
*result = String((const char *)(data->GetPayload()), max);
*result += ellipsis;
}
}
else if (max < 0) { // "tail" mode: keep the last N
do {
if (last != NULL) rolled = true;
tmp = last; last = data; data = tmp;
if (data == NULL) data = ArrayOf<Byte>::Alloc(-max);
is->Read(data, &length);
} while (length == data->GetLength());
if (last == NULL && length <= 0) {
*result = String("");
goto _EXIT_;
}
if (last == NULL) {
*result = String((const char *)(data->GetPayload()), length);
goto _EXIT_;
}
if (length > 0) {
rolled = true;
last->Copy(length, last, 0, last->GetLength() - length);
last->Copy(last->GetLength() - length, data, 0, length);
// System.arraycopy(last, length, last, 0, last.length - length);
// System.arraycopy(data, 0, last, last.length - len, length);
}
if (ellipsis == NULL || !rolled) {
*result = String((const char *)(last->GetPayload()), last->GetLength());
}
else {
*result = ellipsis;
*result += String((const char *)(last->GetPayload()), last->GetLength());
}
}
else { // "cat" mode: size unknown, read it all in streaming fashion
CByteArrayOutputStream::New((IByteArrayOutputStream**)&contents);
os = IOutputStream::Probe(contents);
data = ArrayOf<Byte>::Alloc(1024);
do {
is->Read(data, &length);
if (length > 0) os->Write(data, 0, length);
} while (length == data->GetLength());
contents->ToString(result);
}
_EXIT_:
if (bis) ICloseable::Probe(bis)->Close();
if (input) ICloseable::Probe(input)->Close();
return ec;
}
long TBmpFileGray8Base::write_palette(IOutputStream& aOutputStream) const {
aOutputStream.write(gray_paltette256,256*4);
return 256*4;
}
void TBmpFileColor32Base::save_copy_line(IOutputStream& aOutputStream,const void* pixelsLine)const {
long BmpByteWidth=this->get_bmp_byte_width();
aOutputStream.write(pixelsLine,BmpByteWidth);
}
ssize_t
OutputStream_write(void *cookie, const char *buf, size_t size)
{
IOutputStream* output = (IOutputStream*)cookie;
return output->write(buf, size);
}