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::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;
}