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📄 AArch64TargetParser.cpp(8 KB)
📄 ABIBreak.cpp(811 B)
📄 AMDGPUMetadata.cpp(9.37 KB)
📄 APFloat.cpp(155.26 KB)
📄 APInt.cpp(98.08 KB)
📄 APSInt.cpp(1.44 KB)
📄 ARMAttributeParser.cpp(13.94 KB)
📄 ARMBuildAttrs.cpp(3.45 KB)
📄 ARMTargetParser.cpp(18.09 KB)
📄 ARMWinEH.cpp(1.08 KB)
📄 Allocator.cpp(1.35 KB)
📄 Atomic.cpp(1.6 KB)
📄 BinaryStreamError.cpp(1.76 KB)
📄 BinaryStreamReader.cpp(5.24 KB)
📄 BinaryStreamRef.cpp(4.76 KB)
📄 BinaryStreamWriter.cpp(3.36 KB)
📄 BlockFrequency.cpp(2.12 KB)
📄 BranchProbability.cpp(3.44 KB)
📄 BuryPointer.cpp(1.11 KB)
📄 COM.cpp(737 B)
📄 COPYRIGHT.regex(2.65 KB)
📄 CRC.cpp(5.23 KB)
📄 CachePruning.cpp(10.33 KB)
📄 Chrono.cpp(3.17 KB)
📄 CodeGenCoverage.cpp(3.61 KB)
📄 CommandLine.cpp(89.06 KB)
📄 Compression.cpp(3.84 KB)
📄 ConvertUTF.cpp(27.27 KB)
📄 ConvertUTFWrapper.cpp(8.66 KB)
📄 CrashRecoveryContext.cpp(15.45 KB)
📄 DAGDeltaAlgorithm.cpp(12.47 KB)
📄 DJB.cpp(2.71 KB)
📄 DataExtractor.cpp(7.25 KB)
📄 Debug.cpp(5.64 KB)
📄 DebugCounter.cpp(4.95 KB)
📄 DeltaAlgorithm.cpp(3.41 KB)
📄 DynamicLibrary.cpp(6.25 KB)
📄 ELFAttributeParser.cpp(7.27 KB)
📄 ELFAttributes.cpp(1.27 KB)
📄 Errno.cpp(2.18 KB)
📄 Error.cpp(4.72 KB)
📄 ErrorHandling.cpp(11.08 KB)
📄 ExtensibleRTTI.cpp(446 B)
📄 FileCheck.cpp(95.77 KB)
📄 FileCheckImpl.h(34.14 KB)
📄 FileCollector.cpp(9.01 KB)
📄 FileOutputBuffer.cpp(6.62 KB)
📄 FileUtilities.cpp(10.81 KB)
📄 FoldingSet.cpp(15.89 KB)
📄 FormatVariadic.cpp(5.17 KB)
📄 FormattedStream.cpp(5.29 KB)
📄 GlobPattern.cpp(5 KB)
📄 GraphWriter.cpp(9.21 KB)
📄 Hashing.cpp(1.16 KB)
📄 Host.cpp(51.63 KB)
📄 InitLLVM.cpp(1.92 KB)
📄 IntEqClasses.cpp(2.18 KB)
📄 IntervalMap.cpp(4.4 KB)
📄 ItaniumManglingCanonicalizer.cpp(10.77 KB)
📄 JSON.cpp(19.1 KB)
📄 KnownBits.cpp(3.78 KB)
📄 LEB128.cpp(1.19 KB)
📄 LineIterator.cpp(2.61 KB)
📄 Locale.cpp(377 B)
📄 LockFileManager.cpp(10.64 KB)
📄 LowLevelType.cpp(2.09 KB)
📄 MD5.cpp(8.99 KB)
📄 ManagedStatic.cpp(2.37 KB)
📄 MathExtras.cpp(913 B)
📄 MemAlloc.cpp(1.01 KB)
📄 Memory.cpp(1.57 KB)
📄 MemoryBuffer.cpp(18.99 KB)
📄 NativeFormatting.cpp(7.54 KB)
📄 OptimizedStructLayout.cpp(16.7 KB)
📄 Optional.cpp(530 B)
📄 Parallel.cpp(5.08 KB)
📄 Path.cpp(36.52 KB)
📄 PluginLoader.cpp(1.63 KB)
📄 PrettyStackTrace.cpp(10.33 KB)
📄 Process.cpp(3.27 KB)
📄 Program.cpp(3.54 KB)
📄 RISCVAttributeParser.cpp(2.06 KB)
📄 RISCVAttributes.cpp(970 B)
📄 RWMutex.cpp(3.23 KB)
📄 RandomNumberGenerator.cpp(2.86 KB)
📄 Regex.cpp(6.38 KB)
📄 SHA1.cpp(10.43 KB)
📄 ScaledNumber.cpp(9.09 KB)
📄 ScopedPrinter.cpp(1.19 KB)
📄 Signals.cpp(8.35 KB)
📄 Signposts.cpp(3.24 KB)
📄 SmallPtrSet.cpp(9.21 KB)
📄 SmallVector.cpp(3.99 KB)
📄 SourceMgr.cpp(20.08 KB)
📄 SpecialCaseList.cpp(7.48 KB)
📄 Statistic.cpp(8.85 KB)
📄 StringExtras.cpp(4.34 KB)
📄 StringMap.cpp(9.31 KB)
📄 StringRef.cpp(17.41 KB)
📄 StringSaver.cpp(882 B)
📄 SuffixTree.cpp(7.23 KB)
📄 SymbolRemappingReader.cpp(2.94 KB)
📄 SystemUtils.cpp(1.06 KB)
📄 TarWriter.cpp(7.23 KB)
📄 TargetParser.cpp(9.86 KB)
📄 TargetRegistry.cpp(4.6 KB)
📄 ThreadLocal.cpp(1.68 KB)
📄 ThreadPool.cpp(4.4 KB)
📄 Threading.cpp(4.55 KB)
📄 TimeProfiler.cpp(11.63 KB)
📄 Timer.cpp(14.14 KB)
📄 ToolOutputFile.cpp(1.83 KB)
📄 TrigramIndex.cpp(3.24 KB)
📄 Triple.cpp(53.17 KB)
📄 Twine.cpp(4.6 KB)
📄 Unicode.cpp(20.14 KB)
📄 UnicodeCaseFold.cpp(15.32 KB)
📁 Unix
📄 Valgrind.cpp(1.6 KB)
📄 VersionTuple.cpp(2.74 KB)
📄 VirtualFileSystem.cpp(74.17 KB)
📄 Watchdog.cpp(738 B)
📁 Windows
📄 WithColor.cpp(4.35 KB)
📄 X86TargetParser.cpp(27.21 KB)
📄 YAMLParser.cpp(68.53 KB)
📄 YAMLTraits.cpp(28.37 KB)
📄 Z3Solver.cpp(31.44 KB)
📄 circular_raw_ostream.cpp(1.3 KB)
📄 raw_os_ostream.cpp(995 B)
📄 raw_ostream.cpp(28.97 KB)
📄 regcomp.c(39.42 KB)
📄 regengine.inc(26.49 KB)
📄 regerror.c(4.42 KB)
📄 regex2.h(6.82 KB)
📄 regex_impl.h(3.63 KB)
📄 regexec.c(5.71 KB)
📄 regfree.c(2.49 KB)
📄 regstrlcpy.c(1.56 KB)
📄 regutils.h(2.25 KB)
📄 xxhash.cpp(4.07 KB)

Editing: Regex.cpp

//===-- Regex.cpp - Regular Expression matcher implementation -------------===//
//
// 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 file implements a POSIX regular expression matcher.
//
//===----------------------------------------------------------------------===//

#include "llvm/Support/Regex.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include <cassert>
#include <string>

// Important this comes last because it defines "_REGEX_H_". At least on
// Darwin, if included before any header that (transitively) includes
// xlocale.h, this will cause trouble, because of missing regex-related types.
#include "regex_impl.h"

using namespace llvm;

Regex::Regex() : preg(nullptr), error(REG_BADPAT) {}

Regex::Regex(StringRef regex, RegexFlags Flags) {
  unsigned flags = 0;
  preg = new llvm_regex();
  preg->re_endp = regex.end();
  if (Flags & IgnoreCase)
    flags |= REG_ICASE;
  if (Flags & Newline)
    flags |= REG_NEWLINE;
  if (!(Flags & BasicRegex))
    flags |= REG_EXTENDED;
  error = llvm_regcomp(preg, regex.data(), flags|REG_PEND);
}

Regex::Regex(StringRef regex, unsigned Flags)
    : Regex(regex, static_cast<RegexFlags>(Flags)) {}

Regex::Regex(Regex &&regex) {
  preg = regex.preg;
  error = regex.error;
  regex.preg = nullptr;
  regex.error = REG_BADPAT;
}

Regex::~Regex() {
  if (preg) {
    llvm_regfree(preg);
    delete preg;
  }
}

namespace {

/// Utility to convert a regex error code into a human-readable string.
void RegexErrorToString(int error, struct llvm_regex *preg,
                        std::string &Error) {
  size_t len = llvm_regerror(error, preg, nullptr, 0);

Error.resize(len - 1);
  llvm_regerror(error, preg, &Error[0], len);
}

} // namespace

bool Regex::isValid(std::string &Error) const {
  if (!error)
    return true;

RegexErrorToString(error, preg, Error);
  return false;
}

/// getNumMatches - In a valid regex, return the number of parenthesized
/// matches it contains.
unsigned Regex::getNumMatches() const {
  return preg->re_nsub;
}

bool Regex::match(StringRef String, SmallVectorImpl<StringRef> *Matches,
                  std::string *Error) const {
  // Reset error, if given.
  if (Error && !Error->empty())
    *Error = "";

// Check if the regex itself didn't successfully compile.
  if (Error ? !isValid(*Error) : !isValid())
    return false;

unsigned nmatch = Matches ? preg->re_nsub+1 : 0;

// pmatch needs to have at least one element.
  SmallVector<llvm_regmatch_t, 8> pm;
  pm.resize(nmatch > 0 ? nmatch : 1);
  pm[0].rm_so = 0;
  pm[0].rm_eo = String.size();

int rc = llvm_regexec(preg, String.data(), nmatch, pm.data(), REG_STARTEND);

// Failure to match is not an error, it's just a normal return value.
  // Any other error code is considered abnormal, and is logged in the Error.
  if (rc == REG_NOMATCH)
    return false;
  if (rc != 0) {
    if (Error)
      RegexErrorToString(error, preg, *Error);
    return false;
  }

// There was a match.

if (Matches) { // match position requested
    Matches->clear();

for (unsigned i = 0; i != nmatch; ++i) {
      if (pm[i].rm_so == -1) {
        // this group didn't match
        Matches->push_back(StringRef());
        continue;
      }
      assert(pm[i].rm_eo >= pm[i].rm_so);
      Matches->push_back(StringRef(String.data()+pm[i].rm_so,
                                   pm[i].rm_eo-pm[i].rm_so));
    }
  }

return true;
}

std::string Regex::sub(StringRef Repl, StringRef String,
                       std::string *Error) const {
  SmallVector<StringRef, 8> Matches;

// Return the input if there was no match.
  if (!match(String, &Matches, Error))
    return std::string(String);

// Otherwise splice in the replacement string, starting with the prefix before
  // the match.
  std::string Res(String.begin(), Matches[0].begin());

// Then the replacement string, honoring possible substitutions.
  while (!Repl.empty()) {
    // Skip to the next escape.
    std::pair<StringRef, StringRef> Split = Repl.split('\\');

// Add the skipped substring.
    Res += Split.first;

// Check for terminimation and trailing backslash.
    if (Split.second.empty()) {
      if (Repl.size() != Split.first.size() &&
          Error && Error->empty())
        *Error = "replacement string contained trailing backslash";
      break;
    }

// Otherwise update the replacement string and interpret escapes.
    Repl = Split.second;

// FIXME: We should have a StringExtras function for mapping C99 escapes.
    switch (Repl[0]) {
      // Treat all unrecognized characters as self-quoting.
    default:
      Res += Repl[0];
      Repl = Repl.substr(1);
      break;

// Single character escapes.
    case 't':
      Res += '\t';
      Repl = Repl.substr(1);
      break;
    case 'n':
      Res += '\n';
      Repl = Repl.substr(1);
      break;

// Decimal escapes are backreferences.
    case '0': case '1': case '2': case '3': case '4':
    case '5': case '6': case '7': case '8': case '9': {
      // Extract the backreference number.
      StringRef Ref = Repl.slice(0, Repl.find_first_not_of("0123456789"));
      Repl = Repl.substr(Ref.size());

unsigned RefValue;
      if (!Ref.getAsInteger(10, RefValue) &&
          RefValue < Matches.size())
        Res += Matches[RefValue];
      else if (Error && Error->empty())
        *Error = ("invalid backreference string '" + Twine(Ref) + "'").str();
      break;
    }
    }
  }

// And finally the suffix.
  Res += StringRef(Matches[0].end(), String.end() - Matches[0].end());

return Res;
}

// These are the special characters matched in functions like "p_ere_exp".
static const char RegexMetachars[] = "()^$|*+?.[]\\{}";

bool Regex::isLiteralERE(StringRef Str) {
  // Check for regex metacharacters.  This list was derived from our regex
  // implementation in regcomp.c and double checked against the POSIX extended
  // regular expression specification.
  return Str.find_first_of(RegexMetachars) == StringRef::npos;
}

std::string Regex::escape(StringRef String) {
  std::string RegexStr;
  for (unsigned i = 0, e = String.size(); i != e; ++i) {
    if (strchr(RegexMetachars, String[i]))
      RegexStr += '\\';
    RegexStr += String[i];
  }

return RegexStr;
}

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Editing: Regex.cpp

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