You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.8 KiB
82 lines
2.8 KiB
//===--- 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 "TableGenBackends.h"
|
|
#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;
|
|
}
|
|
|
|
void clang::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 = std::string(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, std::string(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";
|
|
}
|