forked from OSchip/llvm-project
69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
//===- YAML.cpp - YAMLIO utilities for object files -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines utility classes for handling the YAML representation of
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// object files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/YAML.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cctype>
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using namespace llvm;
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using namespace object::yaml;
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void yaml::ScalarTraits<object::yaml::BinaryRef>::output(
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const object::yaml::BinaryRef &Val, void *, llvm::raw_ostream &Out) {
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Val.writeAsHex(Out);
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}
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StringRef yaml::ScalarTraits<object::yaml::BinaryRef>::input(
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StringRef Scalar, void *, object::yaml::BinaryRef &Val) {
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if (Scalar.size() % 2 != 0)
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return "BinaryRef hex string must contain an even number of nybbles.";
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// TODO: Can we improve YAMLIO to permit a more accurate diagnostic here?
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// (e.g. a caret pointing to the offending character).
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for (unsigned I = 0, N = Scalar.size(); I != N; ++I)
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if (!isxdigit(Scalar[I]))
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return "BinaryRef hex string must contain only hex digits.";
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Val = object::yaml::BinaryRef(Scalar);
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return StringRef();
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}
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void BinaryRef::writeAsBinary(raw_ostream &OS) const {
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if (!DataIsHexString) {
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OS.write((const char *)Data.data(), Data.size());
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return;
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}
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for (unsigned I = 0, N = Data.size(); I != N; I += 2) {
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uint8_t Byte;
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StringRef((const char *)&Data[I], 2).getAsInteger(16, Byte);
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OS.write(Byte);
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}
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}
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void BinaryRef::writeAsHex(raw_ostream &OS) const {
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if (binary_size() == 0) {
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OS << "\"\"";
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return;
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}
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if (DataIsHexString) {
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OS.write((const char *)Data.data(), Data.size());
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return;
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}
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for (ArrayRef<uint8_t>::iterator I = Data.begin(), E = Data.end(); I != E;
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++I) {
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uint8_t Byte = *I;
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OS << hexdigit(Byte >> 4);
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OS << hexdigit(Byte & 0xf);
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}
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}
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