60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
//===- Formatters.cpp -----------------------------------------------------===//
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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/CodeView/Formatters.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/DebugInfo/CodeView/GUID.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cassert>
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using namespace llvm;
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using namespace llvm::codeview;
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using namespace llvm::codeview::detail;
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GuidAdapter::GuidAdapter(StringRef Guid)
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: FormatAdapter(makeArrayRef(Guid.bytes_begin(), Guid.bytes_end())) {}
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GuidAdapter::GuidAdapter(ArrayRef<uint8_t> Guid)
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: FormatAdapter(std::move(Guid)) {}
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// From https://docs.microsoft.com/en-us/windows/win32/msi/guid documentation:
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// The GUID data type is a text string representing a Class identifier (ID).
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// All GUIDs must be authored in uppercase.
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// The valid format for a GUID is {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} where
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// X is a hex digit (0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F).
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//
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// The individual string components must be padded to comply with the specific
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// lengths of {8-4-4-4-12} characters.
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// The llvm-yaml2obj tool checks that a GUID follow that format:
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// - the total length to be 38 (including the curly braces.
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// - there is a dash at the positions: 8, 13, 18 and 23.
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void GuidAdapter::format(raw_ostream &Stream, StringRef Style) {
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assert(Item.size() == 16 && "Expected 16-byte GUID");
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struct MSGuid {
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support::ulittle32_t Data1;
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support::ulittle16_t Data2;
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support::ulittle16_t Data3;
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support::ubig64_t Data4;
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};
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const MSGuid *G = reinterpret_cast<const MSGuid *>(Item.data());
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Stream
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<< '{' << format_hex_no_prefix(G->Data1, 8, /*Upper=*/true)
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<< '-' << format_hex_no_prefix(G->Data2, 4, /*Upper=*/true)
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<< '-' << format_hex_no_prefix(G->Data3, 4, /*Upper=*/true)
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<< '-' << format_hex_no_prefix(G->Data4 >> 48, 4, /*Upper=*/true) << '-'
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<< format_hex_no_prefix(G->Data4 & ((1ULL << 48) - 1), 12, /*Upper=*/true)
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<< '}';
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}
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raw_ostream &llvm::codeview::operator<<(raw_ostream &OS, const GUID &Guid) {
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codeview::detail::GuidAdapter A(Guid.Guid);
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A.format(OS, "");
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return OS;
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}
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