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#include "stdafx.h"
#include "Utf16Text.h"
#include "Core/Utf.h"
namespace storm {
Utf16Input::Utf16Input(IStream *src, Bool byteSwap) : src(src), byteSwap(byteSwap), pos(0) {}
Utf16Input::Utf16Input(IStream *src, Bool byteSwap, Buffer start) : src(src), byteSwap(byteSwap), pos(0) {
buf = buffer(engine(), max(Nat(bufSize), start.filled()));
buf.filled(start.filled());
memcpy(buf.dataPtr(), start.dataPtr(), start.filled());
}
void Utf16Input::close() {
src->close();
}
Char Utf16Input::readChar() {
using namespace utf16;
nat16 ch = readCh();
if (leading(ch)) {
nat16 t = readCh();
if (trailing(t))
return Char(assemble(ch, t));
else
return Char('?');
} else if (!trailing(ch)) {
return Char(Nat(ch));
} else {
return Char('?');
}
}
nat16 Utf16Input::readCh() {
// Read in network order.
if (byteSwap) {
nat16 r = readByte();
r |= nat16(readByte()) << 8;
return r;
} else {
nat16 r = nat16(readByte()) << 8;
r |= readByte();
return r;
}
}
byte Utf16Input::readByte() {
if (buf.count() == 0) {
buf = src->read(bufSize);
pos = 0;
}
if (pos >= buf.filled()) {
if (buf.count() < bufSize) {
buf = src->read(bufSize);
} else {
buf.filled(0);
buf = src->read(buf);
}
pos = 0;
}
if (pos < buf.filled())
return buf[pos++];
else
return 0;
}
/**
* Output.
*/
Utf16Output::Utf16Output(OStream *to, Bool byteSwap) : TextOutput(), dest(to), byteSwap(byteSwap) {
init();
}
Utf16Output::Utf16Output(OStream *to, TextInfo info, Bool byteSwap) : TextOutput(info), dest(to), byteSwap(byteSwap) {
init();
}
void Utf16Output::init() {
buf = buffer(engine(), bufSize);
buf.filled(0);
}
void Utf16Output::flush() {
if (buf.filled() > 0)
dest->write(buf);
buf.filled(0);
}
void Utf16Output::close() {
dest->close();
}
void Utf16Output::write(byte *to, wchar ch) {
if (byteSwap) {
to[0] = byte(ch & 0xFF);
to[1] = byte((ch >> 8) & 0xFF);
} else {
to[0] = byte((ch >> 8) & 0xFF);
to[1] = byte(ch & 0xFF);
}
}
void Utf16Output::writeChar(Char ch) {
byte buf[4];
if (ch.leading()) {
write(buf, ch.leading());
write(buf + 2, ch.trailing());
writeBytes(buf, 4);
} else {
write(buf, ch.trailing());
writeBytes(buf, 2);
}
}
void Utf16Output::writeBytes(const byte *data, Nat count) {
Nat filled = buf.filled();
if (filled + count >= buf.count()) {
flush();
filled = buf.filled();
}
memcpy(buf.dataPtr() + filled, data, count);
buf.filled(filled + count);
}
}
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