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1d961ba22d
Although I don't plan to bring over new assertions wholesale into the current qualification branch, it's entirely possible that various minor changes in main will use the new assertions; having this basic support in the release branch will simplify that. (This is why I'm adding the includes as a separate pass from rewriting the individual assertions)
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
//===--- Fingerprint.cpp - A stable identity for compiler data --*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Basic/Assertions.h"
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#include "swift/Basic/Fingerprint.h"
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#include "swift/Basic/STLExtras.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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#include <inttypes.h>
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#include <sstream>
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using namespace swift;
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llvm::raw_ostream &llvm::operator<<(llvm::raw_ostream &OS,
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const Fingerprint &FP) {
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return OS << FP.getRawValue();
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}
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void swift::simple_display(llvm::raw_ostream &out, const Fingerprint &fp) {
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out << fp.getRawValue();
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}
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std::optional<Fingerprint> Fingerprint::fromString(llvm::StringRef value) {
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assert(value.size() == Fingerprint::DIGEST_LENGTH &&
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"Only supports 32-byte hash values!");
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auto fp = Fingerprint::ZERO();
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{
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std::istringstream s(value.drop_back(Fingerprint::DIGEST_LENGTH/2).str());
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s >> std::hex >> fp.core.first;
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}
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{
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std::istringstream s(value.drop_front(Fingerprint::DIGEST_LENGTH/2).str());
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s >> std::hex >> fp.core.second;
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}
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// If the input string is not valid hex, the conversion above can fail.
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if (value != fp.getRawValue())
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return std::nullopt;
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return fp;
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}
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llvm::SmallString<Fingerprint::DIGEST_LENGTH> Fingerprint::getRawValue() const {
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llvm::SmallString<Fingerprint::DIGEST_LENGTH> Str;
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llvm::raw_svector_ostream Res(Str);
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Res << llvm::format_hex_no_prefix(core.first, 16);
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Res << llvm::format_hex_no_prefix(core.second, 16);
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return Str;
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}
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