serialize.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Distributed under the MIT/X11 software license, see the accompanying
   3 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #include <vector>
   6 #include <map>
   7 #include <boost/type_traits/is_fundamental.hpp>
   8 #if defined(_MSC_VER) || defined(__BORLANDC__)
   9 typedef __int64  int64;
  10 typedef unsigned __int64  uint64;
  11 #else
  12 typedef long long  int64;
  13 typedef unsigned long long  uint64;
  14 #endif
  15 #if defined(_MSC_VER) && _MSC_VER < 1300
  16 #define for  if (false) ; else for
  17 #endif
  18 class CScript;
  19 class CDataStream;
  20 class CAutoFile;
  21
  22 static const int VERSION = 303;
  23 static const char* pszSubVer = "";
  24
  25
  26
  27
  28
  29 /////////////////////////////////////////////////////////////////
  30 //
  31 // Templates for serializing to anything that looks like a stream,
  32 // i.e. anything that supports .read(char*, int) and .write(char*, int)
  33 //
  34
  35 enum
  36 {
  37     // primary actions
  38     SER_NETWORK         = (1 << 0),
  39     SER_DISK            = (1 << 1),
  40     SER_GETHASH         = (1 << 2),
  41
  42     // modifiers
  43     SER_SKIPSIG         = (1 << 16),
  44     SER_BLOCKHEADERONLY = (1 << 17),
  45 };
  46
  47 #define IMPLEMENT_SERIALIZE(statements)    \
  48     unsigned int GetSerializeSize(int nType=0, int nVersion=VERSION) const  \
  49     {                                           \
  50         CSerActionGetSerializeSize ser_action;  \
  51         const bool fGetSize = true;             \
  52         const bool fWrite = false;              \
  53         const bool fRead = false;               \
  54         unsigned int nSerSize = 0;              \
  55         ser_streamplaceholder s;                \
  56         s.nType = nType;                        \
  57         s.nVersion = nVersion;                  \
  58         {statements}                            \
  59         return nSerSize;                        \
  60     }                                           \
  61     template<typename Stream>                   \
  62     void Serialize(Stream& s, int nType=0, int nVersion=VERSION) const  \
  63     {                                           \
  64         CSerActionSerialize ser_action;         \
  65         const bool fGetSize = false;            \
  66         const bool fWrite = true;               \
  67         const bool fRead = false;               \
  68         unsigned int nSerSize = 0;              \
  69         {statements}                            \
  70     }                                           \
  71     template<typename Stream>                   \
  72     void Unserialize(Stream& s, int nType=0, int nVersion=VERSION)  \
  73     {                                           \
  74         CSerActionUnserialize ser_action;       \
  75         const bool fGetSize = false;            \
  76         const bool fWrite = false;              \
  77         const bool fRead = true;                \
  78         unsigned int nSerSize = 0;              \
  79         {statements}                            \
  80     }
  81
  82 #define READWRITE(obj)      (nSerSize += ::SerReadWrite(s, (obj), nType, nVersion, ser_action))
  83
  84
  85
  86
  87
  88
  89 //
  90 // Basic types
  91 //
  92 #define WRITEDATA(s, obj)   s.write((char*)&(obj), sizeof(obj))
  93 #define READDATA(s, obj)    s.read((char*)&(obj), sizeof(obj))
  94
  95 inline unsigned int GetSerializeSize(char a,           int, int=0) { return sizeof(a); }
  96 inline unsigned int GetSerializeSize(signed char a,    int, int=0) { return sizeof(a); }
  97 inline unsigned int GetSerializeSize(unsigned char a,  int, int=0) { return sizeof(a); }
  98 inline unsigned int GetSerializeSize(signed short a,   int, int=0) { return sizeof(a); }
  99 inline unsigned int GetSerializeSize(unsigned short a, int, int=0) { return sizeof(a); }
 100 inline unsigned int GetSerializeSize(signed int a,     int, int=0) { return sizeof(a); }
 101 inline unsigned int GetSerializeSize(unsigned int a,   int, int=0) { return sizeof(a); }
 102 inline unsigned int GetSerializeSize(signed long a,    int, int=0) { return sizeof(a); }
 103 inline unsigned int GetSerializeSize(unsigned long a,  int, int=0) { return sizeof(a); }
 104 inline unsigned int GetSerializeSize(int64 a,          int, int=0) { return sizeof(a); }
 105 inline unsigned int GetSerializeSize(uint64 a,         int, int=0) { return sizeof(a); }
 106 inline unsigned int GetSerializeSize(float a,          int, int=0) { return sizeof(a); }
 107 inline unsigned int GetSerializeSize(double a,         int, int=0) { return sizeof(a); }
 108
 109 template<typename Stream> inline void Serialize(Stream& s, char a,           int, int=0) { WRITEDATA(s, a); }
 110 template<typename Stream> inline void Serialize(Stream& s, signed char a,    int, int=0) { WRITEDATA(s, a); }
 111 template<typename Stream> inline void Serialize(Stream& s, unsigned char a,  int, int=0) { WRITEDATA(s, a); }
 112 template<typename Stream> inline void Serialize(Stream& s, signed short a,   int, int=0) { WRITEDATA(s, a); }
 113 template<typename Stream> inline void Serialize(Stream& s, unsigned short a, int, int=0) { WRITEDATA(s, a); }
 114 template<typename Stream> inline void Serialize(Stream& s, signed int a,     int, int=0) { WRITEDATA(s, a); }
 115 template<typename Stream> inline void Serialize(Stream& s, unsigned int a,   int, int=0) { WRITEDATA(s, a); }
 116 template<typename Stream> inline void Serialize(Stream& s, signed long a,    int, int=0) { WRITEDATA(s, a); }
 117 template<typename Stream> inline void Serialize(Stream& s, unsigned long a,  int, int=0) { WRITEDATA(s, a); }
 118 template<typename Stream> inline void Serialize(Stream& s, int64 a,          int, int=0) { WRITEDATA(s, a); }
 119 template<typename Stream> inline void Serialize(Stream& s, uint64 a,         int, int=0) { WRITEDATA(s, a); }
 120 template<typename Stream> inline void Serialize(Stream& s, float a,          int, int=0) { WRITEDATA(s, a); }
 121 template<typename Stream> inline void Serialize(Stream& s, double a,         int, int=0) { WRITEDATA(s, a); }
 122
 123 template<typename Stream> inline void Unserialize(Stream& s, char& a,           int, int=0) { READDATA(s, a); }
 124 template<typename Stream> inline void Unserialize(Stream& s, signed char& a,    int, int=0) { READDATA(s, a); }
 125 template<typename Stream> inline void Unserialize(Stream& s, unsigned char& a,  int, int=0) { READDATA(s, a); }
 126 template<typename Stream> inline void Unserialize(Stream& s, signed short& a,   int, int=0) { READDATA(s, a); }
 127 template<typename Stream> inline void Unserialize(Stream& s, unsigned short& a, int, int=0) { READDATA(s, a); }
 128 template<typename Stream> inline void Unserialize(Stream& s, signed int& a,     int, int=0) { READDATA(s, a); }
 129 template<typename Stream> inline void Unserialize(Stream& s, unsigned int& a,   int, int=0) { READDATA(s, a); }
 130 template<typename Stream> inline void Unserialize(Stream& s, signed long& a,    int, int=0) { READDATA(s, a); }
 131 template<typename Stream> inline void Unserialize(Stream& s, unsigned long& a,  int, int=0) { READDATA(s, a); }
 132 template<typename Stream> inline void Unserialize(Stream& s, int64& a,          int, int=0) { READDATA(s, a); }
 133 template<typename Stream> inline void Unserialize(Stream& s, uint64& a,         int, int=0) { READDATA(s, a); }
 134 template<typename Stream> inline void Unserialize(Stream& s, float& a,          int, int=0) { READDATA(s, a); }
 135 template<typename Stream> inline void Unserialize(Stream& s, double& a,         int, int=0) { READDATA(s, a); }
 136
 137 inline unsigned int GetSerializeSize(bool a, int, int=0)                          { return sizeof(char); }
 138 template<typename Stream> inline void Serialize(Stream& s, bool a, int, int=0)    { char f=a; WRITEDATA(s, f); }
 139 template<typename Stream> inline void Unserialize(Stream& s, bool& a, int, int=0) { char f; READDATA(s, f); a=f; }
 140
 141
 142
 143
 144
 145
 146 //
 147 // Compact size
 148 //  size <  253        -- 1 byte
 149 //  size <= USHRT_MAX  -- 3 bytes  (253 + 2 bytes)
 150 //  size <= UINT_MAX   -- 5 bytes  (254 + 4 bytes)
 151 //  size >  UINT_MAX   -- 9 bytes  (255 + 8 bytes)
 152 //
 153 inline unsigned int GetSizeOfCompactSize(uint64 nSize)
 154 {
 155     if (nSize < UCHAR_MAX-2)     return sizeof(unsigned char);
 156     else if (nSize <= USHRT_MAX) return sizeof(unsigned char) + sizeof(unsigned short);
 157     else if (nSize <= UINT_MAX)  return sizeof(unsigned char) + sizeof(unsigned int);
 158     else                         return sizeof(unsigned char) + sizeof(uint64);
 159 }
 160
 161 template<typename Stream>
 162 void WriteCompactSize(Stream& os, uint64 nSize)
 163 {
 164     if (nSize < UCHAR_MAX-2)
 165     {
 166         unsigned char chSize = nSize;
 167         WRITEDATA(os, chSize);
 168     }
 169     else if (nSize <= USHRT_MAX)
 170     {
 171         unsigned char chSize = UCHAR_MAX-2;
 172         unsigned short xSize = nSize;
 173         WRITEDATA(os, chSize);
 174         WRITEDATA(os, xSize);
 175     }
 176     else if (nSize <= UINT_MAX)
 177     {
 178         unsigned char chSize = UCHAR_MAX-1;
 179         unsigned int xSize = nSize;
 180         WRITEDATA(os, chSize);
 181         WRITEDATA(os, xSize);
 182     }
 183     else
 184     {
 185         unsigned char chSize = UCHAR_MAX;
 186         WRITEDATA(os, chSize);
 187         WRITEDATA(os, nSize);
 188     }
 189     return;
 190 }
 191
 192 template<typename Stream>
 193 uint64 ReadCompactSize(Stream& is)
 194 {
 195     unsigned char chSize;
 196     READDATA(is, chSize);
 197     uint64 nSizeRet = 0;
 198     if (chSize < UCHAR_MAX-2)
 199     {
 200         nSizeRet = chSize;
 201     }
 202     else if (chSize == UCHAR_MAX-2)
 203     {
 204         unsigned short nSize;
 205         READDATA(is, nSize);
 206         nSizeRet = nSize;
 207     }
 208     else if (chSize == UCHAR_MAX-1)
 209     {
 210         unsigned int nSize;
 211         READDATA(is, nSize);
 212         nSizeRet = nSize;
 213     }
 214     else
 215     {
 216         uint64 nSize;
 217         READDATA(is, nSize);
 218         nSizeRet = nSize;
 219     }
 220     if (nSizeRet > (uint64)INT_MAX)
 221         throw std::ios_base::failure("ReadCompactSize() : size too large");
 222     return nSizeRet;
 223 }
 224
 225
 226
 227 //
 228 // Wrapper for serializing arrays and POD
 229 // There's a clever template way to make arrays serialize normally, but MSVC6 doesn't support it
 230 //
 231 #define FLATDATA(obj)   REF(CFlatData((char*)&(obj), (char*)&(obj) + sizeof(obj)))
 232 class CFlatData
 233 {
 234 protected:
 235     char* pbegin;
 236     char* pend;
 237 public:
 238     CFlatData(void* pbeginIn, void* pendIn) : pbegin((char*)pbeginIn), pend((char*)pendIn) { }
 239     char* begin() { return pbegin; }
 240     const char* begin() const { return pbegin; }
 241     char* end() { return pend; }
 242     const char* end() const { return pend; }
 243
 244     unsigned int GetSerializeSize(int, int=0) const
 245     {
 246         return pend - pbegin;
 247     }
 248
 249     template<typename Stream>
 250     void Serialize(Stream& s, int, int=0) const
 251     {
 252         s.write(pbegin, pend - pbegin);
 253     }
 254
 255     template<typename Stream>
 256     void Unserialize(Stream& s, int, int=0)
 257     {
 258         s.read(pbegin, pend - pbegin);
 259     }
 260 };
 261
 262
 263
 264 //
 265 // string stored as a fixed length field
 266 //
 267 template<std::size_t LEN>
 268 class CFixedFieldString
 269 {
 270 protected:
 271     const string* pcstr;
 272     string* pstr;
 273 public:
 274     explicit CFixedFieldString(const string& str) : pcstr(&str), pstr(NULL) { }
 275     explicit CFixedFieldString(string& str) : pcstr(&str), pstr(&str) { }
 276
 277     unsigned int GetSerializeSize(int, int=0) const
 278     {
 279         return LEN;
 280     }
 281
 282     template<typename Stream>
 283     void Serialize(Stream& s, int, int=0) const
 284     {
 285         char pszBuf[LEN];
 286         strncpy(pszBuf, pcstr->c_str(), LEN);
 287         s.write(pszBuf, LEN);
 288     }
 289
 290     template<typename Stream>
 291     void Unserialize(Stream& s, int, int=0)
 292     {
 293         if (pstr == NULL)
 294             throw std::ios_base::failure("CFixedFieldString::Unserialize : trying to unserialize to const string");
 295         char pszBuf[LEN+1];
 296         s.read(pszBuf, LEN);
 297         pszBuf[LEN] = '\0';
 298         *pstr = pszBuf;
 299     }
 300 };
 301
 302
 303
 304
 305
 306 //
 307 // Forward declarations
 308 //
 309
 310 // string
 311 template<typename C> unsigned int GetSerializeSize(const basic_string<C>& str, int, int=0);
 312 template<typename Stream, typename C> void Serialize(Stream& os, const basic_string<C>& str, int, int=0);
 313 template<typename Stream, typename C> void Unserialize(Stream& is, basic_string<C>& str, int, int=0);
 314
 315 // vector
 316 template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&);
 317 template<typename T, typename A> unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&);
 318 template<typename T, typename A> inline unsigned int GetSerializeSize(const std::vector<T, A>& v, int nType, int nVersion=VERSION);
 319 template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&);
 320 template<typename Stream, typename T, typename A> void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&);
 321 template<typename Stream, typename T, typename A> inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion=VERSION);
 322 template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&);
 323 template<typename Stream, typename T, typename A> void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&);
 324 template<typename Stream, typename T, typename A> inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion=VERSION);
 325
 326 // others derived from vector
 327 extern inline unsigned int GetSerializeSize(const CScript& v, int nType, int nVersion=VERSION);
 328 template<typename Stream> void Serialize(Stream& os, const CScript& v, int nType, int nVersion=VERSION);
 329 template<typename Stream> void Unserialize(Stream& is, CScript& v, int nType, int nVersion=VERSION);
 330
 331 // pair
 332 template<typename K, typename T> unsigned int GetSerializeSize(const std::pair<K, T>& item, int nType, int nVersion=VERSION);
 333 template<typename Stream, typename K, typename T> void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion=VERSION);
 334 template<typename Stream, typename K, typename T> void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion=VERSION);
 335
 336 // map
 337 template<typename K, typename T, typename Pred, typename A> unsigned int GetSerializeSize(const std::map<K, T, Pred, A>& m, int nType, int nVersion=VERSION);
 338 template<typename Stream, typename K, typename T, typename Pred, typename A> void Serialize(Stream& os, const std::map<K, T, Pred, A>& m, int nType, int nVersion=VERSION);
 339 template<typename Stream, typename K, typename T, typename Pred, typename A> void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion=VERSION);
 340
 341 // set
 342 template<typename K, typename Pred, typename A> unsigned int GetSerializeSize(const std::set<K, Pred, A>& m, int nType, int nVersion=VERSION);
 343 template<typename Stream, typename K, typename Pred, typename A> void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion=VERSION);
 344 template<typename Stream, typename K, typename Pred, typename A> void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion=VERSION);
 345
 346
 347
 348
 349
 350 //
 351 // If none of the specialized versions above matched, default to calling member function.
 352 // "int nType" is changed to "long nType" to keep from getting an ambiguous overload error.
 353 // The compiler will only cast int to long if none of the other templates matched.
 354 // Thanks to Boost serialization for this idea.
 355 //
 356 template<typename T>
 357 inline unsigned int GetSerializeSize(const T& a, long nType, int nVersion=VERSION)
 358 {
 359     return a.GetSerializeSize((int)nType, nVersion);
 360 }
 361
 362 template<typename Stream, typename T>
 363 inline void Serialize(Stream& os, const T& a, long nType, int nVersion=VERSION)
 364 {
 365     a.Serialize(os, (int)nType, nVersion);
 366 }
 367
 368 template<typename Stream, typename T>
 369 inline void Unserialize(Stream& is, T& a, long nType, int nVersion=VERSION)
 370 {
 371     a.Unserialize(is, (int)nType, nVersion);
 372 }
 373
 374
 375
 376
 377
 378 //
 379 // string
 380 //
 381 template<typename C>
 382 unsigned int GetSerializeSize(const basic_string<C>& str, int, int)
 383 {
 384     return GetSizeOfCompactSize(str.size()) + str.size() * sizeof(str[0]);
 385 }
 386
 387 template<typename Stream, typename C>
 388 void Serialize(Stream& os, const basic_string<C>& str, int, int)
 389 {
 390     WriteCompactSize(os, str.size());
 391     if (!str.empty())
 392         os.write((char*)&str[0], str.size() * sizeof(str[0]));
 393 }
 394
 395 template<typename Stream, typename C>
 396 void Unserialize(Stream& is, basic_string<C>& str, int, int)
 397 {
 398     unsigned int nSize = ReadCompactSize(is);
 399     str.resize(nSize);
 400     if (nSize != 0)
 401         is.read((char*)&str[0], nSize * sizeof(str[0]));
 402 }
 403
 404
 405
 406 //
 407 // vector
 408 //
 409 template<typename T, typename A>
 410 unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&)
 411 {
 412     return (GetSizeOfCompactSize(v.size()) + v.size() * sizeof(T));
 413 }
 414
 415 template<typename T, typename A>
 416 unsigned int GetSerializeSize_impl(const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&)
 417 {
 418     unsigned int nSize = GetSizeOfCompactSize(v.size());
 419     for (typename std::vector<T, A>::const_iterator vi = v.begin(); vi != v.end(); ++vi)
 420         nSize += GetSerializeSize((*vi), nType, nVersion);
 421     return nSize;
 422 }
 423
 424 template<typename T, typename A>
 425 inline unsigned int GetSerializeSize(const std::vector<T, A>& v, int nType, int nVersion)
 426 {
 427     return GetSerializeSize_impl(v, nType, nVersion, boost::is_fundamental<T>());
 428 }
 429
 430
 431 template<typename Stream, typename T, typename A>
 432 void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&)
 433 {
 434     WriteCompactSize(os, v.size());
 435     if (!v.empty())
 436         os.write((char*)&v[0], v.size() * sizeof(T));
 437 }
 438
 439 template<typename Stream, typename T, typename A>
 440 void Serialize_impl(Stream& os, const std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&)
 441 {
 442     WriteCompactSize(os, v.size());
 443     for (typename std::vector<T, A>::const_iterator vi = v.begin(); vi != v.end(); ++vi)
 444         ::Serialize(os, (*vi), nType, nVersion);
 445 }
 446
 447 template<typename Stream, typename T, typename A>
 448 inline void Serialize(Stream& os, const std::vector<T, A>& v, int nType, int nVersion)
 449 {
 450     Serialize_impl(os, v, nType, nVersion, boost::is_fundamental<T>());
 451 }
 452
 453
 454 template<typename Stream, typename T, typename A>
 455 void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::true_type&)
 456 {
 457     //unsigned int nSize = ReadCompactSize(is);
 458     //v.resize(nSize);
 459     //is.read((char*)&v[0], nSize * sizeof(T));
 460
 461     // Limit size per read so bogus size value won't cause out of memory
 462     v.clear();
 463     unsigned int nSize = ReadCompactSize(is);
 464     unsigned int i = 0;
 465     while (i < nSize)
 466     {
 467         unsigned int blk = min(nSize - i, (unsigned int)(1 + 4999999 / sizeof(T)));
 468         v.resize(i + blk);
 469         is.read((char*)&v[i], blk * sizeof(T));
 470         i += blk;
 471     }
 472 }
 473
 474 template<typename Stream, typename T, typename A>
 475 void Unserialize_impl(Stream& is, std::vector<T, A>& v, int nType, int nVersion, const boost::false_type&)
 476 {
 477     //unsigned int nSize = ReadCompactSize(is);
 478     //v.resize(nSize);
 479     //for (std::vector<T, A>::iterator vi = v.begin(); vi != v.end(); ++vi)
 480     //    Unserialize(is, (*vi), nType, nVersion);
 481
 482     v.clear();
 483     unsigned int nSize = ReadCompactSize(is);
 484     unsigned int i = 0;
 485     unsigned int nMid = 0;
 486     while (nMid < nSize)
 487     {
 488         nMid += 5000000 / sizeof(T);
 489         if (nMid > nSize)
 490             nMid = nSize;
 491         v.resize(nMid);
 492         for (; i < nMid; i++)
 493             Unserialize(is, v[i], nType, nVersion);
 494     }
 495 }
 496
 497 template<typename Stream, typename T, typename A>
 498 inline void Unserialize(Stream& is, std::vector<T, A>& v, int nType, int nVersion)
 499 {
 500     Unserialize_impl(is, v, nType, nVersion, boost::is_fundamental<T>());
 501 }
 502
 503
 504
 505 //
 506 // others derived from vector
 507 //
 508 inline unsigned int GetSerializeSize(const CScript& v, int nType, int nVersion)
 509 {
 510     return GetSerializeSize((const vector<unsigned char>&)v, nType, nVersion);
 511 }
 512
 513 template<typename Stream>
 514 void Serialize(Stream& os, const CScript& v, int nType, int nVersion)
 515 {
 516     Serialize(os, (const vector<unsigned char>&)v, nType, nVersion);
 517 }
 518
 519 template<typename Stream>
 520 void Unserialize(Stream& is, CScript& v, int nType, int nVersion)
 521 {
 522     Unserialize(is, (vector<unsigned char>&)v, nType, nVersion);
 523 }
 524
 525
 526
 527 //
 528 // pair
 529 //
 530 template<typename K, typename T>
 531 unsigned int GetSerializeSize(const std::pair<K, T>& item, int nType, int nVersion)
 532 {
 533     return GetSerializeSize(item.first, nType, nVersion) + GetSerializeSize(item.second, nType, nVersion);
 534 }
 535
 536 template<typename Stream, typename K, typename T>
 537 void Serialize(Stream& os, const std::pair<K, T>& item, int nType, int nVersion)
 538 {
 539     Serialize(os, item.first, nType, nVersion);
 540     Serialize(os, item.second, nType, nVersion);
 541 }
 542
 543 template<typename Stream, typename K, typename T>
 544 void Unserialize(Stream& is, std::pair<K, T>& item, int nType, int nVersion)
 545 {
 546     Unserialize(is, item.first, nType, nVersion);
 547     Unserialize(is, item.second, nType, nVersion);
 548 }
 549
 550
 551
 552 //
 553 // map
 554 //
 555 template<typename K, typename T, typename Pred, typename A>
 556 unsigned int GetSerializeSize(const std::map<K, T, Pred, A>& m, int nType, int nVersion)
 557 {
 558     unsigned int nSize = GetSizeOfCompactSize(m.size());
 559     for (typename std::map<K, T, Pred, A>::const_iterator mi = m.begin(); mi != m.end(); ++mi)
 560         nSize += GetSerializeSize((*mi), nType, nVersion);
 561     return nSize;
 562 }
 563
 564 template<typename Stream, typename K, typename T, typename Pred, typename A>
 565 void Serialize(Stream& os, const std::map<K, T, Pred, A>& m, int nType, int nVersion)
 566 {
 567     WriteCompactSize(os, m.size());
 568     for (typename std::map<K, T, Pred, A>::const_iterator mi = m.begin(); mi != m.end(); ++mi)
 569         Serialize(os, (*mi), nType, nVersion);
 570 }
 571
 572 template<typename Stream, typename K, typename T, typename Pred, typename A>
 573 void Unserialize(Stream& is, std::map<K, T, Pred, A>& m, int nType, int nVersion)
 574 {
 575     m.clear();
 576     unsigned int nSize = ReadCompactSize(is);
 577     typename std::map<K, T, Pred, A>::iterator mi = m.begin();
 578     for (unsigned int i = 0; i < nSize; i++)
 579     {
 580         pair<K, T> item;
 581         Unserialize(is, item, nType, nVersion);
 582         mi = m.insert(mi, item);
 583     }
 584 }
 585
 586
 587
 588 //
 589 // set
 590 //
 591 template<typename K, typename Pred, typename A>
 592 unsigned int GetSerializeSize(const std::set<K, Pred, A>& m, int nType, int nVersion)
 593 {
 594     unsigned int nSize = GetSizeOfCompactSize(m.size());
 595     for (typename std::set<K, Pred, A>::const_iterator it = m.begin(); it != m.end(); ++it)
 596         nSize += GetSerializeSize((*it), nType, nVersion);
 597     return nSize;
 598 }
 599
 600 template<typename Stream, typename K, typename Pred, typename A>
 601 void Serialize(Stream& os, const std::set<K, Pred, A>& m, int nType, int nVersion)
 602 {
 603     WriteCompactSize(os, m.size());
 604     for (typename std::set<K, Pred, A>::const_iterator it = m.begin(); it != m.end(); ++it)
 605         Serialize(os, (*it), nType, nVersion);
 606 }
 607
 608 template<typename Stream, typename K, typename Pred, typename A>
 609 void Unserialize(Stream& is, std::set<K, Pred, A>& m, int nType, int nVersion)
 610 {
 611     m.clear();
 612     unsigned int nSize = ReadCompactSize(is);
 613     typename std::set<K, Pred, A>::iterator it = m.begin();
 614     for (unsigned int i = 0; i < nSize; i++)
 615     {
 616         K key;
 617         Unserialize(is, key, nType, nVersion);
 618         it = m.insert(it, key);
 619     }
 620 }
 621
 622
 623
 624 //
 625 // Support for IMPLEMENT_SERIALIZE and READWRITE macro
 626 //
 627 class CSerActionGetSerializeSize { };
 628 class CSerActionSerialize { };
 629 class CSerActionUnserialize { };
 630
 631 template<typename Stream, typename T>
 632 inline unsigned int SerReadWrite(Stream& s, const T& obj, int nType, int nVersion, CSerActionGetSerializeSize ser_action)
 633 {
 634     return ::GetSerializeSize(obj, nType, nVersion);
 635 }
 636
 637 template<typename Stream, typename T>
 638 inline unsigned int SerReadWrite(Stream& s, const T& obj, int nType, int nVersion, CSerActionSerialize ser_action)
 639 {
 640     ::Serialize(s, obj, nType, nVersion);
 641     return 0;
 642 }
 643
 644 template<typename Stream, typename T>
 645 inline unsigned int SerReadWrite(Stream& s, T& obj, int nType, int nVersion, CSerActionUnserialize ser_action)
 646 {
 647     ::Unserialize(s, obj, nType, nVersion);
 648     return 0;
 649 }
 650
 651 struct ser_streamplaceholder
 652 {
 653     int nType;
 654     int nVersion;
 655 };
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665 //
 666 // Allocator that clears its contents before deletion
 667 //
 668 template<typename T>
 669 struct secure_allocator : public std::allocator<T>
 670 {
 671     // MSVC8 default copy constructor is broken
 672     typedef std::allocator<T> base;
 673     typedef typename base::size_type size_type;
 674     typedef typename base::difference_type  difference_type;
 675     typedef typename base::pointer pointer;
 676     typedef typename base::const_pointer const_pointer;
 677     typedef typename base::reference reference;
 678     typedef typename base::const_reference const_reference;
 679     typedef typename base::value_type value_type;
 680     secure_allocator() throw() {}
 681     secure_allocator(const secure_allocator& a) throw() : base(a) {}
 682     ~secure_allocator() throw() {}
 683     template<typename _Other> struct rebind
 684     { typedef secure_allocator<_Other> other; };
 685
 686     void deallocate(T* p, std::size_t n)
 687     {
 688         if (p != NULL)
 689             memset(p, 0, sizeof(T) * n);
 690         allocator<T>::deallocate(p, n);
 691     }
 692 };
 693
 694
 695
 696 //
 697 // Double ended buffer combining vector and stream-like interfaces.
 698 // >> and << read and write unformatted data using the above serialization templates.
 699 // Fills with data in linear time; some stringstream implementations take N^2 time.
 700 //
 701 class CDataStream
 702 {
 703 protected:
 704     typedef vector<char, secure_allocator<char> > vector_type;
 705     vector_type vch;
 706     unsigned int nReadPos;
 707     short state;
 708     short exceptmask;
 709 public:
 710     int nType;
 711     int nVersion;
 712
 713     typedef vector_type::allocator_type   allocator_type;
 714     typedef vector_type::size_type        size_type;
 715     typedef vector_type::difference_type  difference_type;
 716     typedef vector_type::reference        reference;
 717     typedef vector_type::const_reference  const_reference;
 718     typedef vector_type::value_type       value_type;
 719     typedef vector_type::iterator         iterator;
 720     typedef vector_type::const_iterator   const_iterator;
 721     typedef vector_type::reverse_iterator reverse_iterator;
 722
 723     explicit CDataStream(int nTypeIn=0, int nVersionIn=VERSION)
 724     {
 725         Init(nTypeIn, nVersionIn);
 726     }
 727
 728     CDataStream(const_iterator pbegin, const_iterator pend, int nTypeIn=0, int nVersionIn=VERSION) : vch(pbegin, pend)
 729     {
 730         Init(nTypeIn, nVersionIn);
 731     }
 732
 733 #if !defined(_MSC_VER) || _MSC_VER >= 1300
 734     CDataStream(const char* pbegin, const char* pend, int nTypeIn=0, int nVersionIn=VERSION) : vch(pbegin, pend)
 735     {
 736         Init(nTypeIn, nVersionIn);
 737     }
 738 #endif
 739
 740     CDataStream(const vector_type& vchIn, int nTypeIn=0, int nVersionIn=VERSION) : vch(vchIn.begin(), vchIn.end())
 741     {
 742         Init(nTypeIn, nVersionIn);
 743     }
 744
 745     CDataStream(const vector<char>& vchIn, int nTypeIn=0, int nVersionIn=VERSION) : vch(vchIn.begin(), vchIn.end())
 746     {
 747         Init(nTypeIn, nVersionIn);
 748     }
 749
 750     CDataStream(const vector<unsigned char>& vchIn, int nTypeIn=0, int nVersionIn=VERSION) : vch((char*)&vchIn.begin()[0], (char*)&vchIn.end()[0])
 751     {
 752         Init(nTypeIn, nVersionIn);
 753     }
 754
 755     void Init(int nTypeIn=0, int nVersionIn=VERSION)
 756     {
 757         nReadPos = 0;
 758         nType = nTypeIn;
 759         nVersion = nVersionIn;
 760         state = 0;
 761         exceptmask = ios::badbit | ios::failbit;
 762     }
 763
 764     CDataStream& operator+=(const CDataStream& b)
 765     {
 766         vch.insert(vch.end(), b.begin(), b.end());
 767         return *this;
 768     }
 769
 770     friend CDataStream operator+(const CDataStream& a, const CDataStream& b)
 771     {
 772         CDataStream ret = a;
 773         ret += b;
 774         return (ret);
 775     }
 776
 777     string str() const
 778     {
 779         return (string(begin(), end()));
 780     }
 781
 782
 783     //
 784     // Vector subset
 785     //
 786     const_iterator begin() const                     { return vch.begin() + nReadPos; }
 787     iterator begin()                                 { return vch.begin() + nReadPos; }
 788     const_iterator end() const                       { return vch.end(); }
 789     iterator end()                                   { return vch.end(); }
 790     size_type size() const                           { return vch.size() - nReadPos; }
 791     bool empty() const                               { return vch.size() == nReadPos; }
 792     void resize(size_type n, value_type c=0)         { vch.resize(n + nReadPos, c); }
 793     void reserve(size_type n)                        { vch.reserve(n + nReadPos); }
 794     const_reference operator[](size_type pos) const  { return vch[pos + nReadPos]; }
 795     reference operator[](size_type pos)              { return vch[pos + nReadPos]; }
 796     void clear()                                     { vch.clear(); nReadPos = 0; }
 797     iterator insert(iterator it, const char& x=char()) { return vch.insert(it, x); }
 798     void insert(iterator it, size_type n, const char& x) { vch.insert(it, n, x); }
 799
 800     void insert(iterator it, const_iterator first, const_iterator last)
 801     {
 802         if (it == vch.begin() + nReadPos && last - first <= nReadPos)
 803         {
 804             // special case for inserting at the front when there's room
 805             nReadPos -= (last - first);
 806             memcpy(&vch[nReadPos], &first[0], last - first);
 807         }
 808         else
 809             vch.insert(it, first, last);
 810     }
 811
 812     void insert(iterator it, vector<char>::const_iterator first, vector<char>::const_iterator last)
 813     {
 814         if (it == vch.begin() + nReadPos && last - first <= nReadPos)
 815         {
 816             // special case for inserting at the front when there's room
 817             nReadPos -= (last - first);
 818             memcpy(&vch[nReadPos], &first[0], last - first);
 819         }
 820         else
 821             vch.insert(it, first, last);
 822     }
 823
 824 #if !defined(_MSC_VER) || _MSC_VER >= 1300
 825     void insert(iterator it, const char* first, const char* last)
 826     {
 827         if (it == vch.begin() + nReadPos && last - first <= nReadPos)
 828         {
 829             // special case for inserting at the front when there's room
 830             nReadPos -= (last - first);
 831             memcpy(&vch[nReadPos], &first[0], last - first);
 832         }
 833         else
 834             vch.insert(it, first, last);
 835     }
 836 #endif
 837
 838     iterator erase(iterator it)
 839     {
 840         if (it == vch.begin() + nReadPos)
 841         {
 842             // special case for erasing from the front
 843             if (++nReadPos >= vch.size())
 844             {
 845                 // whenever we reach the end, we take the opportunity to clear the buffer
 846                 nReadPos = 0;
 847                 return vch.erase(vch.begin(), vch.end());
 848             }
 849             return vch.begin() + nReadPos;
 850         }
 851         else
 852             return vch.erase(it);
 853     }
 854
 855     iterator erase(iterator first, iterator last)
 856     {
 857         if (first == vch.begin() + nReadPos)
 858         {
 859             // special case for erasing from the front
 860             if (last == vch.end())
 861             {
 862                 nReadPos = 0;
 863                 return vch.erase(vch.begin(), vch.end());
 864             }
 865             else
 866             {
 867                 nReadPos = (last - vch.begin());
 868                 return last;
 869             }
 870         }
 871         else
 872             return vch.erase(first, last);
 873     }
 874
 875     inline void Compact()
 876     {
 877         vch.erase(vch.begin(), vch.begin() + nReadPos);
 878         nReadPos = 0;
 879     }
 880
 881     bool Rewind(size_type n)
 882     {
 883         // Rewind by n characters if the buffer hasn't been compacted yet
 884         if (n > nReadPos)
 885             return false;
 886         nReadPos -= n;
 887         return true;
 888     }
 889
 890
 891     //
 892     // Stream subset
 893     //
 894     void setstate(short bits, const char* psz)
 895     {
 896         state |= bits;
 897         if (state & exceptmask)
 898             throw std::ios_base::failure(psz);
 899     }
 900
 901     bool eof() const             { return size() == 0; }
 902     bool fail() const            { return state & (ios::badbit | ios::failbit); }
 903     bool good() const            { return !eof() && (state == 0); }
 904     void clear(short n)          { state = n; }  // name conflict with vector clear()
 905     short exceptions()           { return exceptmask; }
 906     short exceptions(short mask) { short prev = exceptmask; exceptmask = mask; setstate(0, "CDataStream"); return prev; }
 907     CDataStream* rdbuf()         { return this; }
 908     int in_avail()               { return size(); }
 909
 910     void SetType(int n)          { nType = n; }
 911     int GetType()                { return nType; }
 912     void SetVersion(int n)       { nVersion = n; }
 913     int GetVersion()             { return nVersion; }
 914     void ReadVersion()           { *this >> nVersion; }
 915     void WriteVersion()          { *this << nVersion; }
 916
 917     CDataStream& read(char* pch, int nSize)
 918     {
 919         // Read from the beginning of the buffer
 920         assert(nSize >= 0);
 921         unsigned int nReadPosNext = nReadPos + nSize;
 922         if (nReadPosNext >= vch.size())
 923         {
 924             if (nReadPosNext > vch.size())
 925             {
 926                 setstate(ios::failbit, "CDataStream::read() : end of data");
 927                 memset(pch, 0, nSize);
 928                 nSize = vch.size() - nReadPos;
 929             }
 930             memcpy(pch, &vch[nReadPos], nSize);
 931             nReadPos = 0;
 932             vch.clear();
 933             return (*this);
 934         }
 935         memcpy(pch, &vch[nReadPos], nSize);
 936         nReadPos = nReadPosNext;
 937         return (*this);
 938     }
 939
 940     CDataStream& ignore(int nSize)
 941     {
 942         // Ignore from the beginning of the buffer
 943         assert(nSize >= 0);
 944         unsigned int nReadPosNext = nReadPos + nSize;
 945         if (nReadPosNext >= vch.size())
 946         {
 947             if (nReadPosNext > vch.size())
 948             {
 949                 setstate(ios::failbit, "CDataStream::ignore() : end of data");
 950                 nSize = vch.size() - nReadPos;
 951             }
 952             nReadPos = 0;
 953             vch.clear();
 954             return (*this);
 955         }
 956         nReadPos = nReadPosNext;
 957         return (*this);
 958     }
 959
 960     CDataStream& write(const char* pch, int nSize)
 961     {
 962         // Write to the end of the buffer
 963         assert(nSize >= 0);
 964         vch.insert(vch.end(), pch, pch + nSize);
 965         return (*this);
 966     }
 967
 968     template<typename Stream>
 969     void Serialize(Stream& s, int nType=0, int nVersion=VERSION) const
 970     {
 971         // Special case: stream << stream concatenates like stream += stream
 972         if (!vch.empty())
 973             s.write((char*)&vch[0], vch.size() * sizeof(vch[0]));
 974     }
 975
 976     template<typename T>
 977     unsigned int GetSerializeSize(const T& obj)
 978     {
 979         // Tells the size of the object if serialized to this stream
 980         return ::GetSerializeSize(obj, nType, nVersion);
 981     }
 982
 983     template<typename T>
 984     CDataStream& operator<<(const T& obj)
 985     {
 986         // Serialize to this stream
 987         ::Serialize(*this, obj, nType, nVersion);
 988         return (*this);
 989     }
 990
 991     template<typename T>
 992     CDataStream& operator>>(T& obj)
 993     {
 994         // Unserialize from this stream
 995         ::Unserialize(*this, obj, nType, nVersion);
 996         return (*this);
 997     }
 998 };
 999
1000 #ifdef TESTCDATASTREAM
1001 // VC6sp6
1002 // CDataStream:
1003 // n=1000       0 seconds
1004 // n=2000       0 seconds
1005 // n=4000       0 seconds
1006 // n=8000       0 seconds
1007 // n=16000      0 seconds
1008 // n=32000      0 seconds
1009 // n=64000      1 seconds
1010 // n=128000     1 seconds
1011 // n=256000     2 seconds
1012 // n=512000     4 seconds
1013 // n=1024000    8 seconds
1014 // n=2048000    16 seconds
1015 // n=4096000    32 seconds
1016 // stringstream:
1017 // n=1000       1 seconds
1018 // n=2000       1 seconds
1019 // n=4000       13 seconds
1020 // n=8000       87 seconds
1021 // n=16000      400 seconds
1022 // n=32000      1660 seconds
1023 // n=64000      6749 seconds
1024 // n=128000     27241 seconds
1025 // n=256000     109804 seconds
1026 #include <iostream>
1027 int main(int argc, char *argv[])
1028 {
1029     vector<unsigned char> vch(0xcc, 250);
1030     printf("CDataStream:\n");
1031     for (int n = 1000; n <= 4500000; n *= 2)
1032     {
1033         CDataStream ss;
1034         time_t nStart = time(NULL);
1035         for (int i = 0; i < n; i++)
1036             ss.write((char*)&vch[0], vch.size());
1037         printf("n=%-10d %d seconds\n", n, time(NULL) - nStart);
1038     }
1039     printf("stringstream:\n");
1040     for (int n = 1000; n <= 4500000; n *= 2)
1041     {
1042         stringstream ss;
1043         time_t nStart = time(NULL);
1044         for (int i = 0; i < n; i++)
1045             ss.write((char*)&vch[0], vch.size());
1046         printf("n=%-10d %d seconds\n", n, time(NULL) - nStart);
1047     }
1048 }
1049 #endif
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060 //
1061 // Automatic closing wrapper for FILE*
1062 //  - Will automatically close the file when it goes out of scope if not null.
1063 //  - If you're returning the file pointer, return file.release().
1064 //  - If you need to close the file early, use file.fclose() instead of fclose(file).
1065 //
1066 class CAutoFile
1067 {
1068 protected:
1069     FILE* file;
1070     short state;
1071     short exceptmask;
1072 public:
1073     int nType;
1074     int nVersion;
1075
1076     typedef FILE element_type;
1077
1078     CAutoFile(FILE* filenew=NULL, int nTypeIn=SER_DISK, int nVersionIn=VERSION)
1079     {
1080         file = filenew;
1081         nType = nTypeIn;
1082         nVersion = nVersionIn;
1083         state = 0;
1084         exceptmask = ios::badbit | ios::failbit;
1085     }
1086
1087     ~CAutoFile()
1088     {
1089         fclose();
1090     }
1091
1092     void fclose()
1093     {
1094         if (file != NULL && file != stdin && file != stdout && file != stderr)
1095             ::fclose(file);
1096         file = NULL;
1097     }
1098
1099     FILE* release()             { FILE* ret = file; file = NULL; return ret; }
1100     operator FILE*()            { return file; }
1101     FILE* operator->()          { return file; }
1102     FILE& operator*()           { return *file; }
1103     FILE** operator&()          { return &file; }
1104     FILE* operator=(FILE* pnew) { return file = pnew; }
1105     bool operator!()            { return (file == NULL); }
1106
1107
1108     //
1109     // Stream subset
1110     //
1111     void setstate(short bits, const char* psz)
1112     {
1113         state |= bits;
1114         if (state & exceptmask)
1115             throw std::ios_base::failure(psz);
1116     }
1117
1118     bool fail() const            { return state & (ios::badbit | ios::failbit); }
1119     bool good() const            { return state == 0; }
1120     void clear(short n = 0)      { state = n; }
1121     short exceptions()           { return exceptmask; }
1122     short exceptions(short mask) { short prev = exceptmask; exceptmask = mask; setstate(0, "CAutoFile"); return prev; }
1123
1124     void SetType(int n)          { nType = n; }
1125     int GetType()                { return nType; }
1126     void SetVersion(int n)       { nVersion = n; }
1127     int GetVersion()             { return nVersion; }
1128     void ReadVersion()           { *this >> nVersion; }
1129     void WriteVersion()          { *this << nVersion; }
1130
1131     CAutoFile& read(char* pch, int nSize)
1132     {
1133         if (!file)
1134             throw std::ios_base::failure("CAutoFile::read : file handle is NULL");
1135         if (fread(pch, 1, nSize, file) != nSize)
1136             setstate(ios::failbit, feof(file) ? "CAutoFile::read : end of file" : "CAutoFile::read : fread failed");
1137         return (*this);
1138     }
1139
1140     CAutoFile& write(const char* pch, int nSize)
1141     {
1142         if (!file)
1143             throw std::ios_base::failure("CAutoFile::write : file handle is NULL");
1144         if (fwrite(pch, 1, nSize, file) != nSize)
1145             setstate(ios::failbit, "CAutoFile::write : write failed");
1146         return (*this);
1147     }
1148
1149     template<typename T>
1150     unsigned int GetSerializeSize(const T& obj)
1151     {
1152         // Tells the size of the object if serialized to this stream
1153         return ::GetSerializeSize(obj, nType, nVersion);
1154     }
1155
1156     template<typename T>
1157     CAutoFile& operator<<(const T& obj)
1158     {
1159         // Serialize to this stream
1160         if (!file)
1161             throw std::ios_base::failure("CAutoFile::operator<< : file handle is NULL");
1162         ::Serialize(*this, obj, nType, nVersion);
1163         return (*this);
1164     }
1165
1166     template<typename T>
1167     CAutoFile& operator>>(T& obj)
1168     {
1169         // Unserialize from this stream
1170         if (!file)
1171             throw std::ios_base::failure("CAutoFile::operator>> : file handle is NULL");
1172         ::Unserialize(*this, obj, nType, nVersion);
1173         return (*this);
1174     }
1175 };