1 files changed, 0 insertions, 201 deletions
diff --git a/gnu/llvm/lib/Support/TarWriter.cpp b/gnu/llvm/lib/Support/TarWriter.cpp
deleted file mode 100644
index 5b4d554befe..00000000000
--- a/gnu/llvm/lib/Support/TarWriter.cpp
+++ /dev/null
@@ -1,201 +0,0 @@
-//===-- TarWriter.cpp - Tar archive file creator --------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// TarWriter class provides a feature to create a tar archive file.
-//
-// I put emphasis on simplicity over comprehensiveness when implementing this
-// class because we don't need a full-fledged archive file generator in LLVM
-// at the moment.
-//
-// The filename field in the Unix V7 tar header is 100 bytes. Longer filenames
-// are stored using the PAX extension. The PAX header is standardized in
-// POSIX.1-2001.
-//
-// The struct definition of UstarHeader is copied from
-// https://www.freebsd.org/cgi/man.cgi?query=tar&sektion=5
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Support/TarWriter.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/Path.h"
-
-using namespace llvm;
-
-// Each file in an archive must be aligned to this block size.
-static const int BlockSize = 512;
-
-struct UstarHeader {
-  char Name[100];
-  char Mode[8];
-  char Uid[8];
-  char Gid[8];
-  char Size[12];
-  char Mtime[12];
-  char Checksum[8];
-  char TypeFlag;
-  char Linkname[100];
-  char Magic[6];
-  char Version[2];
-  char Uname[32];
-  char Gname[32];
-  char DevMajor[8];
-  char DevMinor[8];
-  char Prefix[155];
-  char Pad[12];
-};
-static_assert(sizeof(UstarHeader) == BlockSize, "invalid Ustar header");
-
-static UstarHeader makeUstarHeader() {
-  UstarHeader Hdr = {};
-  memcpy(Hdr.Magic, "ustar", 5); // Ustar magic
-  memcpy(Hdr.Version, "00", 2);  // Ustar version
-  return Hdr;
-}
-
-// A PAX attribute is in the form of "<length> <key>=<value>\n"
-// where <length> is the length of the entire string including
-// the length field itself. An example string is this.
-//
-//   25 ctime=1084839148.1212\n
-//
-// This function create such string.
-static std::string formatPax(StringRef Key, StringRef Val) {
-  int Len = Key.size() + Val.size() + 3; // +3 for " ", "=" and "\n"
-
-  // We need to compute total size twice because appending
-  // a length field could change total size by one.
-  int Total = Len + Twine(Len).str().size();
-  Total = Len + Twine(Total).str().size();
-  return (Twine(Total) + " " + Key + "=" + Val + "\n").str();
-}
-
-// Headers in tar files must be aligned to 512 byte boundaries.
-// This function forwards the current file position to the next boundary.
-static void pad(raw_fd_ostream &OS) {
-  uint64_t Pos = OS.tell();
-  OS.seek(alignTo(Pos, BlockSize));
-}
-
-// Computes a checksum for a tar header.
-static void computeChecksum(UstarHeader &Hdr) {
-  // Before computing a checksum, checksum field must be
-  // filled with space characters.
-  memset(Hdr.Checksum, ' ', sizeof(Hdr.Checksum));
-
-  // Compute a checksum and set it to the checksum field.
-  unsigned Chksum = 0;
-  for (size_t I = 0; I < sizeof(Hdr); ++I)
-    Chksum += reinterpret_cast<uint8_t *>(&Hdr)[I];
-  snprintf(Hdr.Checksum, sizeof(Hdr.Checksum), "%06o", Chksum);
-}
-
-// Create a tar header and write it to a given output stream.
-static void writePaxHeader(raw_fd_ostream &OS, StringRef Path) {
-  // A PAX header consists of a 512-byte header followed
-  // by key-value strings. First, create key-value strings.
-  std::string PaxAttr = formatPax("path", Path);
-
-  // Create a 512-byte header.
-  UstarHeader Hdr = makeUstarHeader();
-  snprintf(Hdr.Size, sizeof(Hdr.Size), "%011zo", PaxAttr.size());
-  Hdr.TypeFlag = 'x'; // PAX magic
-  computeChecksum(Hdr);
-
-  // Write them down.
-  OS << StringRef(reinterpret_cast<char *>(&Hdr), sizeof(Hdr));
-  OS << PaxAttr;
-  pad(OS);
-}
-
-// Path fits in a Ustar header if
-//
-// - Path is less than 100 characters long, or
-// - Path is in the form of "<prefix>/<name>" where <prefix> is less
-//   than or equal to 155 characters long and <name> is less than 100
-//   characters long. Both <prefix> and <name> can contain extra '/'.
-//
-// If Path fits in a Ustar header, updates Prefix and Name and returns true.
-// Otherwise, returns false.
-static bool splitUstar(StringRef Path, StringRef &Prefix, StringRef &Name) {
-  if (Path.size() < sizeof(UstarHeader::Name)) {
-    Prefix = "";
-    Name = Path;
-    return true;
-  }
-
-  size_t Sep = Path.rfind('/', sizeof(UstarHeader::Prefix) + 1);
-  if (Sep == StringRef::npos)
-    return false;
-  if (Path.size() - Sep - 1 >= sizeof(UstarHeader::Name))
-    return false;
-
-  Prefix = Path.substr(0, Sep);
-  Name = Path.substr(Sep + 1);
-  return true;
-}
-
-// The PAX header is an extended format, so a PAX header needs
-// to be followed by a "real" header.
-static void writeUstarHeader(raw_fd_ostream &OS, StringRef Prefix,
-                             StringRef Name, size_t Size) {
-  UstarHeader Hdr = makeUstarHeader();
-  memcpy(Hdr.Name, Name.data(), Name.size());
-  memcpy(Hdr.Mode, "0000664", 8);
-  snprintf(Hdr.Size, sizeof(Hdr.Size), "%011zo", Size);
-  memcpy(Hdr.Prefix, Prefix.data(), Prefix.size());
-  computeChecksum(Hdr);
-  OS << StringRef(reinterpret_cast<char *>(&Hdr), sizeof(Hdr));
-}
-
-// Creates a TarWriter instance and returns it.
-Expected<std::unique_ptr<TarWriter>> TarWriter::create(StringRef OutputPath,
-                                                       StringRef BaseDir) {
-  using namespace sys::fs;
-  int FD;
-  if (std::error_code EC =
-          openFileForWrite(OutputPath, FD, CD_CreateAlways, OF_None))
-    return make_error<StringError>("cannot open " + OutputPath, EC);
-  return std::unique_ptr<TarWriter>(new TarWriter(FD, BaseDir));
-}
-
-TarWriter::TarWriter(int FD, StringRef BaseDir)
-    : OS(FD, /*shouldClose=*/true, /*unbuffered=*/false), BaseDir(BaseDir) {}
-
-// Append a given file to an archive.
-void TarWriter::append(StringRef Path, StringRef Data) {
-  // Write Path and Data.
-  std::string Fullpath = BaseDir + "/" + sys::path::convert_to_slash(Path);
-
-  // We do not want to include the same file more than once.
-  if (!Files.insert(Fullpath).second)
-    return;
-
-  StringRef Prefix;
-  StringRef Name;
-  if (splitUstar(Fullpath, Prefix, Name)) {
-    writeUstarHeader(OS, Prefix, Name, Data.size());
-  } else {
-    writePaxHeader(OS, Fullpath);
-    writeUstarHeader(OS, "", "", Data.size());
-  }
-
-  OS << Data;
-  pad(OS);
-
-  // POSIX requires tar archives end with two null blocks.
-  // Here, we write the terminator and then seek back, so that
-  // the file being output is terminated correctly at any moment.
-  uint64_t Pos = OS.tell();
-  OS << std::string(BlockSize * 2, '\0');
-  OS.seek(Pos);
-  OS.flush();
-}