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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
72 lines
2.6 KiB
C++
72 lines
2.6 KiB
C++
//===- HashTable.cpp - PDB Hash Table -------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/PDB/Native/HashTable.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/DebugInfo/PDB/Native/RawError.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamWriter.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MathExtras.h"
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#include <algorithm>
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#include <cassert>
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#include <cstdint>
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#include <utility>
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using namespace llvm;
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using namespace llvm::pdb;
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Error llvm::pdb::readSparseBitVector(BinaryStreamReader &Stream,
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SparseBitVector<> &V) {
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uint32_t NumWords;
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if (auto EC = Stream.readInteger(NumWords))
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return joinErrors(
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std::move(EC),
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make_error<RawError>(raw_error_code::corrupt_file,
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"Expected hash table number of words"));
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for (uint32_t I = 0; I != NumWords; ++I) {
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uint32_t Word;
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if (auto EC = Stream.readInteger(Word))
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return joinErrors(std::move(EC),
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make_error<RawError>(raw_error_code::corrupt_file,
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"Expected hash table word"));
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for (unsigned Idx = 0; Idx < 32; ++Idx)
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if (Word & (1U << Idx))
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V.set((I * 32) + Idx);
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}
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return Error::success();
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}
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Error llvm::pdb::writeSparseBitVector(BinaryStreamWriter &Writer,
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SparseBitVector<> &Vec) {
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constexpr int BitsPerWord = 8 * sizeof(uint32_t);
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int ReqBits = Vec.find_last() + 1;
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uint32_t ReqWords = alignTo(ReqBits, BitsPerWord) / BitsPerWord;
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if (auto EC = Writer.writeInteger(ReqWords))
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return joinErrors(
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std::move(EC),
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make_error<RawError>(raw_error_code::corrupt_file,
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"Could not write linear map number of words"));
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uint32_t Idx = 0;
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for (uint32_t I = 0; I != ReqWords; ++I) {
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uint32_t Word = 0;
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for (uint32_t WordIdx = 0; WordIdx < 32; ++WordIdx, ++Idx) {
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if (Vec.test(Idx))
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Word |= (1 << WordIdx);
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}
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if (auto EC = Writer.writeInteger(Word))
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return joinErrors(std::move(EC), make_error<RawError>(
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raw_error_code::corrupt_file,
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"Could not write linear map word"));
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}
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return Error::success();
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}
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