本文整理汇总了C++中BitstreamReader::ReadCode方法的典型用法代码示例。如果您正苦于以下问题：C++ BitstreamReader::ReadCode方法的具体用法？C++ BitstreamReader::ReadCode怎么用？C++ BitstreamReader::ReadCode使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BitstreamReader的用法示例。
在下文中一共展示了BitstreamReader::ReadCode方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ParseBlock
/// ParseBlock - Read a block, updating statistics, etc.
static bool ParseBlock(BitstreamReader &Stream, unsigned IndentLevel) {
std::string Indent(IndentLevel*2, ' ');
uint64_t BlockBitStart = Stream.GetCurrentBitNo();
unsigned BlockID = Stream.ReadSubBlockID();
// Get the statistics for this BlockID.
PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
BlockStats.NumInstances++;
// BLOCKINFO is a special part of the stream.
if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
if (Dump) std::cerr << Indent << "<BLOCKINFO_BLOCK/>\n";
if (Stream.ReadBlockInfoBlock())
return Error("Malformed BlockInfoBlock");
uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
BlockStats.NumBits += BlockBitEnd-BlockBitStart;
return false;
}
unsigned NumWords = 0;
if (Stream.EnterSubBlock(BlockID, &NumWords))
return Error("Malformed block record");
const char *BlockName = 0;
if (Dump) {
std::cerr << Indent << "<";
if ((BlockName = GetBlockName(BlockID)))
std::cerr << BlockName;
else
std::cerr << "UnknownBlock" << BlockID;
if (NonSymbolic && BlockName)
std::cerr << " BlockID=" << BlockID;
std::cerr << " NumWords=" << NumWords
<< " BlockCodeSize=" << Stream.GetAbbrevIDWidth() << ">\n";
}
SmallVector<uint64_t, 64> Record;
// Read all the records for this block.
while (1) {
if (Stream.AtEndOfStream())
return Error("Premature end of bitstream");
// Read the code for this record.
unsigned AbbrevID = Stream.ReadCode();
switch (AbbrevID) {
case bitc::END_BLOCK: {
if (Stream.ReadBlockEnd())
return Error("Error at end of block");
uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
BlockStats.NumBits += BlockBitEnd-BlockBitStart;
if (Dump) {
std::cerr << Indent << "</";
if (BlockName)
std::cerr << BlockName << ">\n";
else
std::cerr << "UnknownBlock" << BlockID << ">\n";
}
return false;
}
case bitc::ENTER_SUBBLOCK: {
uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
if (ParseBlock(Stream, IndentLevel+1))
return true;
++BlockStats.NumSubBlocks;
uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
// Don't include subblock sizes in the size of this block.
BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
break;
}
case bitc::DEFINE_ABBREV:
Stream.ReadAbbrevRecord();
++BlockStats.NumAbbrevs;
break;
default:
++BlockStats.NumRecords;
if (AbbrevID != bitc::UNABBREV_RECORD)
++BlockStats.NumAbbreviatedRecords;
Record.clear();
unsigned Code = Stream.ReadRecord(AbbrevID, Record);
// Increment the # occurrences of this code.
if (BlockStats.CodeFreq.size() <= Code)
BlockStats.CodeFreq.resize(Code+1);
BlockStats.CodeFreq[Code]++;
if (Dump) {
std::cerr << Indent << " <";
if (const char *CodeName = GetCodeName(Code, BlockID))
std::cerr << CodeName;
else
std::cerr << "UnknownCode" << Code;
if (NonSymbolic && GetCodeName(Code, BlockID))
std::cerr << " codeid=" << Code;
//.........这里部分代码省略.........