void NaClBitstreamCursor::readAbbreviatedLiteral(
const NaClBitCodeAbbrevOp &Op,
SmallVectorImpl<uint64_t> &Vals) {
assert(Op.isLiteral() && "Not a literal");
// If the abbrev specifies the literal value to use, use it.
Vals.push_back(Op.getLiteralValue());
}
void NaClBitstreamCursor::skipAbbreviatedField(const NaClBitCodeAbbrevOp &Op) {
assert(!Op.isLiteral() && "Use ReadAbbreviatedLiteral for literals!");
// Decode the value as we are commanded.
switch (Op.getEncoding()) {
default:
report_fatal_error("Should not reach here");
case NaClBitCodeAbbrevOp::Fixed:
(void)Read((unsigned)Op.getEncodingData());
break;
case NaClBitCodeAbbrevOp::VBR:
(void)ReadVBR64((unsigned)Op.getEncodingData());
break;
case NaClBitCodeAbbrevOp::Char6:
(void)Read(6);
break;
}
}
uint64_t NaClBitstreamCursor::readArrayAbbreviatedField(
const NaClBitCodeAbbrevOp &Op) {
// Decode the value as we are commanded.
switch (Op.getEncoding()) {
case NaClBitCodeAbbrevOp::Literal:
return Op.getValue();
case NaClBitCodeAbbrevOp::Fixed:
return Read((unsigned)Op.getValue());
case NaClBitCodeAbbrevOp::VBR:
return ReadVBR64((unsigned)Op.getValue());
case NaClBitCodeAbbrevOp::Array:
// This can't happen because the abbreviation must be valid.
llvm_unreachable("Bad array abbreviation encoding!");
break;
case NaClBitCodeAbbrevOp::Char6:
return NaClBitCodeAbbrevOp::DecodeChar6(Read(6));
}
llvm_unreachable("Illegal abbreviation encoding for field!");
}
void NaClBitstreamCursor::readAbbreviatedField(
const NaClBitCodeAbbrevOp &Op,
SmallVectorImpl<uint64_t> &Vals) {
assert(!Op.isLiteral() && "Use ReadAbbreviatedLiteral for literals!");
// Decode the value as we are commanded.
switch (Op.getEncoding()) {
default:
report_fatal_error("Should not reach here");
case NaClBitCodeAbbrevOp::Fixed:
Vals.push_back(Read((unsigned)Op.getEncodingData()));
break;
case NaClBitCodeAbbrevOp::VBR:
Vals.push_back(ReadVBR64((unsigned)Op.getEncodingData()));
break;
case NaClBitCodeAbbrevOp::Char6:
Vals.push_back(NaClBitCodeAbbrevOp::DecodeChar6(Read(6)));
break;
}
}
void NaClBitstreamCursor::skipAbbreviatedField(const NaClBitCodeAbbrevOp &Op) {
// Decode the value as we are commanded.
switch (Op.getEncoding()) {
case NaClBitCodeAbbrevOp::Literal:
// No read necessary for literal.
break;
case NaClBitCodeAbbrevOp::Fixed:
(void)Read((unsigned)Op.getValue());
break;
case NaClBitCodeAbbrevOp::VBR:
(void)ReadVBR64((unsigned)Op.getValue());
break;
case NaClBitCodeAbbrevOp::Array:
// This can't happen because the abbreviation must be valid.
llvm_unreachable("Bad array abbreviation encoding!");
break;
case NaClBitCodeAbbrevOp::Char6:
(void)Read(6);
break;
}
}
bool NaClBitstreamCursor::readRecordAbbrevField(
const NaClBitCodeAbbrevOp &Op, uint64_t &Value) {
switch (Op.getEncoding()) {
case NaClBitCodeAbbrevOp::Literal:
Value = Op.getValue();
break;
case NaClBitCodeAbbrevOp::Array:
// Returns number of elements in the array.
Value = ReadVBR(6);
return true;
case NaClBitCodeAbbrevOp::Fixed:
Value = Read((unsigned)Op.getValue());
break;
case NaClBitCodeAbbrevOp::VBR:
Value = ReadVBR64((unsigned)Op.getValue());
break;
case NaClBitCodeAbbrevOp::Char6:
Value = NaClBitCodeAbbrevOp::DecodeChar6(Read(6));
break;
}
return false;
}
