main.cpp

一个7ZIP的解压源码。比较详细。里面含有四种语言的实现代码。

// Main.cpp

#include "StdAfx.h"

#include "Common/MyInitGuid.h"

#include "Common/CommandLineParser.h"
#include "Common/MyException.h"
#include "Common/IntToString.h"
#include "Common/StdOutStream.h"
#include "Common/StringConvert.h"
#include "Common/StringToInt.h"

#include "Windows/FileDir.h"
#include "Windows/FileName.h"
#include "Windows/Defs.h"
#include "Windows/Error.h"
#ifdef _WIN32
#include "Windows/MemoryLock.h"
#endif

#include "../../IPassword.h"
#include "../../ICoder.h"
#include "../Common/UpdateAction.h"
#include "../Common/Update.h"
#include "../Common/Extract.h"
#include "../Common/ArchiveCommandLine.h"
#include "../Common/ExitCode.h"
#ifdef EXTERNAL_CODECS
#include "../Common/LoadCodecs.h"
#endif

#include "../../Compress/LZMA_Alone/LzmaBenchCon.h"

#include "List.h"
#include "OpenCallbackConsole.h"
#include "ExtractCallbackConsole.h"
#include "UpdateCallbackConsole.h"

#include "../../MyVersion.h"

#if defined( _WIN32) && defined( _7ZIP_LARGE_PAGES)
extern "C" 
{ 
#include "../../../../C/Alloc.h"
}
#endif

using namespace NWindows;
using namespace NFile;
using namespace NCommandLineParser;

HINSTANCE g_hInstance = 0;
extern CStdOutStream *g_StdStream;

static const char *kCopyrightString = "\n7-Zip"
#ifndef EXTERNAL_CODECS
" (A)"
#endif

#ifdef _WIN64
" [64]"
#endif

" " MY_VERSION_COPYRIGHT_DATE "\n";

static const char *kHelpString = 
    "\nUsage: 7z"
#ifdef _NO_CRYPTO
    "r"
#else
#ifndef EXTERNAL_CODECS
    "a"
#endif
#endif
    " <command> [<switches>...] <archive_name> [<file_names>...]\n"
    "       [<@listfiles...>]\n"
    "\n"
    "<Commands>\n"
    "  a: Add files to archive\n"
    "  b: Benchmark\n"
    "  d: Delete files from archive\n"
    "  e: Extract files from archive (without using directory names)\n"
    "  l: List contents of archive\n"
//    "  l[a|t][f]: List contents of archive\n"
//    "    a - with Additional fields\n"
//    "    t - with all fields\n"
//    "    f - with Full pathnames\n"
    "  t: Test integrity of archive\n"
    "  u: Update files to archive\n"
    "  x: eXtract files with full paths\n"
    "<Switches>\n"
    "  -ai[r[-|0]]{@listfile|!wildcard}: Include archives\n"
    "  -ax[r[-|0]]{@listfile|!wildcard}: eXclude archives\n"
    "  -bd: Disable percentage indicator\n"
    "  -i[r[-|0]]{@listfile|!wildcard}: Include filenames\n"
    "  -m{Parameters}: set compression Method\n"
    "  -o{Directory}: set Output directory\n"
    "  -p{Password}: set Password\n"
    "  -r[-|0]: Recurse subdirectories\n"
    "  -scs{UTF-8 | WIN | DOS}: set charset for list files\n"
    "  -sfx[{name}]: Create SFX archive\n"
    "  -si[{name}]: read data from stdin\n"
    "  -slt: show technical information for l (List) command\n"
    "  -so: write data to stdout\n"
    "  -ssc[-]: set sensitive case mode\n"
    "  -ssw: compress shared files\n"
    "  -t{Type}: Set type of archive\n"
    "  -v{Size}[b|k|m|g]: Create volumes\n"
    "  -u[-][p#][q#][r#][x#][y#][z#][!newArchiveName]: Update options\n"
    "  -w[{path}]: assign Work directory. Empty path means a temporary directory\n"
    "  -x[r[-|0]]]{@listfile|!wildcard}: eXclude filenames\n"
    "  -y: assume Yes on all queries\n";

// ---------------------------
// exception messages

static const char *kEverythingIsOk = "Everything is Ok";
static const char *kUserErrorMessage  = "Incorrect command line"; // NExitCode::kUserError

static const wchar_t *kDefaultSfxModule = L"7zCon.sfx";

static void ShowMessageAndThrowException(CStdOutStream &s, LPCSTR message, NExitCode::EEnum code)
{
  s << message << endl;
  throw code;
}

static void PrintHelpAndExit(CStdOutStream &s) // yyy
{
  s << kHelpString;
  ShowMessageAndThrowException(s, kUserErrorMessage, NExitCode::kUserError);
}

#ifndef _WIN32
static void GetArguments(int numArguments, const char *arguments[], UStringVector &parts)
{
  parts.Clear();
  for(int i = 0; i < numArguments; i++)
  {
    UString s = MultiByteToUnicodeString(arguments[i]);
    parts.Add(s);
  }
}
#endif

static void ShowCopyrightAndHelp(CStdOutStream &s, bool needHelp)
{
  s << kCopyrightString;
  // s << "# CPUs: " << (UInt64)NWindows::NSystem::GetNumberOfProcessors() << "\n";
  if (needHelp) 
    s << kHelpString;
}

#ifdef EXTERNAL_CODECS
static void PrintString(CStdOutStream &stdStream, const AString &s, int size)
{
  int len = s.Length();
  stdStream << s;
  for (int i = len; i < size; i++)
    stdStream << ' ';
}
#endif

static void PrintString(CStdOutStream &stdStream, const UString &s, int size)
{
  int len = s.Length();
  stdStream << s;
  for (int i = len; i < size; i++)
    stdStream << ' ';
}

static inline char GetHex(Byte value)
{
  return (char)((value < 10) ? ('0' + value) : ('A' + (value - 10)));
}

int Main2(
  #ifndef _WIN32  
  int numArguments, const char *arguments[]
  #endif
)
{
  #ifdef _WIN32  
  SetFileApisToOEM();
  #endif
  
  UStringVector commandStrings;
  #ifdef _WIN32  
  NCommandLineParser::SplitCommandLine(GetCommandLineW(), commandStrings);
  #else
  GetArguments(numArguments, arguments, commandStrings);
  #endif

  if(commandStrings.Size() == 1)
  {
    ShowCopyrightAndHelp(g_StdOut, true);
    return 0;
  }
  commandStrings.Delete(0);

  CArchiveCommandLineOptions options;

  CArchiveCommandLineParser parser;

  parser.Parse1(commandStrings, options);

  if(options.HelpMode)
  {
    ShowCopyrightAndHelp(g_StdOut, true);
    return 0;
  }

  #if defined(_WIN32) && defined(_7ZIP_LARGE_PAGES)
  if (options.LargePages)
  {
    SetLargePageSize();
    NSecurity::EnableLockMemoryPrivilege();
  }
  #endif

  CStdOutStream &stdStream = options.StdOutMode ? g_StdErr : g_StdOut;
  g_StdStream = &stdStream;

  if (options.EnableHeaders)
    ShowCopyrightAndHelp(stdStream, false);

  parser.Parse2(options);

  CCodecs *codecs = new CCodecs;
  CMyComPtr<
    #ifdef EXTERNAL_CODECS
    ICompressCodecsInfo
    #else
    IUnknown
    #endif
    > compressCodecsInfo = codecs;
  HRESULT result = codecs->Load();
  if (result != S_OK)
    throw CSystemException(result);

  bool isExtractGroupCommand = options.Command.IsFromExtractGroup();
  if (options.Command.CommandType == NCommandType::kInfo)
  {
    stdStream << endl << "Formats:" << endl;
    int i;
    for (i = 0; i < codecs->Formats.Size(); i++)
    {
      const CArcInfoEx &arc = codecs->Formats[i];
      #ifdef EXTERNAL_CODECS
      if (arc.LibIndex >= 0)
      {
        char s[32];
        ConvertUInt64ToString(arc.LibIndex, s);
        PrintString(stdStream, s, 2);
      }
      else
      #endif
        stdStream << "  ";
      stdStream << ' ';
      stdStream << (char)(arc.UpdateEnabled ? 'C' : ' ');
      stdStream << (char)(arc.KeepName ? 'K' : ' ');
      stdStream << "  ";
      PrintString(stdStream, arc.Name, 6);
      stdStream << "  ";
      UString s;
      for (int t = 0; t < arc.Exts.Size(); t++)
      {
        const CArcExtInfo &ext = arc.Exts[t];
        s += ext.Ext;
        if (!ext.AddExt.IsEmpty())
        {
          s += L" (";
          s += ext.AddExt;
          s += L')';
        }
        s += L' ';
      }
      PrintString(stdStream, s, 14);
      stdStream << "  ";
      const CByteBuffer &sig = arc.StartSignature;
      for (size_t j = 0; j < sig.GetCapacity(); j++)