2946cd7010
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
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
//===--- ClangCommentHTMLNamedCharacterReferenceEmitter.cpp -----------------=//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This tablegen backend emits an efficient function to translate HTML named
|
|
// character references to UTF-8 sequences.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/Support/ConvertUTF.h"
|
|
#include "llvm/TableGen/Error.h"
|
|
#include "llvm/TableGen/Record.h"
|
|
#include "llvm/TableGen/StringMatcher.h"
|
|
#include "llvm/TableGen/TableGenBackend.h"
|
|
#include <vector>
|
|
|
|
using namespace llvm;
|
|
|
|
/// Convert a code point to the corresponding UTF-8 sequence represented
|
|
/// as a C string literal.
|
|
///
|
|
/// \returns true on success.
|
|
static bool translateCodePointToUTF8(unsigned CodePoint,
|
|
SmallVectorImpl<char> &CLiteral) {
|
|
char Translated[UNI_MAX_UTF8_BYTES_PER_CODE_POINT];
|
|
char *TranslatedPtr = Translated;
|
|
if (!ConvertCodePointToUTF8(CodePoint, TranslatedPtr))
|
|
return false;
|
|
|
|
StringRef UTF8(Translated, TranslatedPtr - Translated);
|
|
|
|
raw_svector_ostream OS(CLiteral);
|
|
OS << "\"";
|
|
for (size_t i = 0, e = UTF8.size(); i != e; ++i) {
|
|
OS << "\\x";
|
|
OS.write_hex(static_cast<unsigned char>(UTF8[i]));
|
|
}
|
|
OS << "\"";
|
|
|
|
return true;
|
|
}
|
|
|
|
namespace clang {
|
|
void EmitClangCommentHTMLNamedCharacterReferences(RecordKeeper &Records,
|
|
raw_ostream &OS) {
|
|
std::vector<Record *> Tags = Records.getAllDerivedDefinitions("NCR");
|
|
std::vector<StringMatcher::StringPair> NameToUTF8;
|
|
SmallString<32> CLiteral;
|
|
for (std::vector<Record *>::iterator I = Tags.begin(), E = Tags.end();
|
|
I != E; ++I) {
|
|
Record &Tag = **I;
|
|
std::string Spelling = Tag.getValueAsString("Spelling");
|
|
uint64_t CodePoint = Tag.getValueAsInt("CodePoint");
|
|
CLiteral.clear();
|
|
CLiteral.append("return ");
|
|
if (!translateCodePointToUTF8(CodePoint, CLiteral)) {
|
|
SrcMgr.PrintMessage(Tag.getLoc().front(),
|
|
SourceMgr::DK_Error,
|
|
Twine("invalid code point"));
|
|
continue;
|
|
}
|
|
CLiteral.append(";");
|
|
|
|
StringMatcher::StringPair Match(Spelling, CLiteral.str());
|
|
NameToUTF8.push_back(Match);
|
|
}
|
|
|
|
emitSourceFileHeader("HTML named character reference to UTF-8 "
|
|
"translation", OS);
|
|
|
|
OS << "StringRef translateHTMLNamedCharacterReferenceToUTF8(\n"
|
|
" StringRef Name) {\n";
|
|
StringMatcher("Name", NameToUTF8, OS).Emit();
|
|
OS << " return StringRef();\n"
|
|
<< "}\n\n";
|
|
}
|
|
|
|
} // end namespace clang
|
|
|