contrib/libc++/include/strstream

   1 // -*- C++ -*-
   2 //===--------------------------- strstream --------------------------------===//
   3 //
   4 //                     The LLVM Compiler Infrastructure
   5 //
   6 // This file is dual licensed under the MIT and the University of Illinois Open
   7 // Source Licenses. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10
  11 #ifndef _LIBCPP_STRSTREAM
  12 #define _LIBCPP_STRSTREAM
  13
  14 /*
  15     strstream synopsis
  16
  17 class strstreambuf
  18     : public basic_streambuf<char>
  19 {
  20 public:
  21     explicit strstreambuf(streamsize alsize_arg = 0);
  22     strstreambuf(void* (*palloc_arg)(size_t), void (*pfree_arg)(void*));
  23     strstreambuf(char* gnext_arg, streamsize n, char* pbeg_arg = 0);
  24     strstreambuf(const char* gnext_arg, streamsize n);
  25
  26     strstreambuf(signed char* gnext_arg, streamsize n, signed char* pbeg_arg = 0);
  27     strstreambuf(const signed char* gnext_arg, streamsize n);
  28     strstreambuf(unsigned char* gnext_arg, streamsize n, unsigned char* pbeg_arg = 0);
  29     strstreambuf(const unsigned char* gnext_arg, streamsize n);
  30
  31     strstreambuf(strstreambuf&& rhs);
  32     strstreambuf& operator=(strstreambuf&& rhs);
  33
  34     virtual ~strstreambuf();
  35
  36     void swap(strstreambuf& rhs);
  37
  38     void freeze(bool freezefl = true);
  39     char* str();
  40     int pcount() const;
  41
  42 protected:
  43     virtual int_type overflow (int_type c = EOF);
  44     virtual int_type pbackfail(int_type c = EOF);
  45     virtual int_type underflow();
  46     virtual pos_type seekoff(off_type off, ios_base::seekdir way,
  47                              ios_base::openmode which = ios_base::in | ios_base::out);
  48     virtual pos_type seekpos(pos_type sp,
  49                              ios_base::openmode which = ios_base::in | ios_base::out);
  50     virtual streambuf* setbuf(char* s, streamsize n);
  51
  52 private:
  53     typedef T1 strstate;                // exposition only
  54     static const strstate allocated;    // exposition only
  55     static const strstate constant;     // exposition only
  56     static const strstate dynamic;      // exposition only
  57     static const strstate frozen;       // exposition only
  58     strstate strmode;                   // exposition only
  59     streamsize alsize;                  // exposition only
  60     void* (*palloc)(size_t);            // exposition only
  61     void (*pfree)(void*);               // exposition only
  62 };
  63
  64 class istrstream
  65     : public basic_istream<char>
  66 {
  67 public:
  68     explicit istrstream(const char* s);
  69     explicit istrstream(char* s);
  70     istrstream(const char* s, streamsize n);
  71     istrstream(char* s, streamsize n);
  72
  73     virtual ~istrstream();
  74
  75     strstreambuf* rdbuf() const;
  76     char *str();
  77
  78 private:
  79     strstreambuf sb; // exposition only
  80 };
  81
  82 class ostrstream
  83     : public basic_ostream<char>
  84 {
  85 public:
  86     ostrstream();
  87     ostrstream(char* s, int n, ios_base::openmode mode = ios_base::out);
  88
  89     virtual ~ostrstream();
  90
  91     strstreambuf* rdbuf() const;
  92     void freeze(bool freezefl = true);
  93     char* str();
  94     int pcount() const;
  95
  96 private:
  97     strstreambuf sb; // exposition only
  98 };
  99
 100 class strstream
 101     : public basic_iostream<char>
 102 {
 103 public:
 104     // Types
 105     typedef char                        char_type;
 106     typedef char_traits<char>::int_type int_type;
 107     typedef char_traits<char>::pos_type pos_type;
 108     typedef char_traits<char>::off_type off_type;
 109
 110     // constructors/destructor
 111     strstream();
 112     strstream(char* s, int n, ios_base::openmode mode = ios_base::in | ios_base::out);
 113
 114     virtual ~strstream();
 115
 116     // Members:
 117     strstreambuf* rdbuf() const;
 118     void freeze(bool freezefl = true);
 119     int pcount() const;
 120     char* str();
 121
 122 private:
 123     strstreambuf sb; // exposition only
 124 };
 125
 126 }  // std
 127
 128 */
 129
 130 #include <__config>
 131 #include <ostream>
 132 #include <istream>
 133
 134 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 135 #pragma GCC system_header
 136 #endif
 137
 138 _LIBCPP_BEGIN_NAMESPACE_STD
 139
 140 class _LIBCPP_TYPE_VIS strstreambuf
 141     : public streambuf
 142 {
 143 public:
 144     explicit strstreambuf(streamsize __alsize = 0);
 145     strstreambuf(void* (*__palloc)(size_t), void (*__pfree)(void*));
 146     strstreambuf(char* __gnext, streamsize __n, char* __pbeg = 0);
 147     strstreambuf(const char* __gnext, streamsize __n);
 148
 149     strstreambuf(signed char* __gnext, streamsize __n, signed char* __pbeg = 0);
 150     strstreambuf(const signed char* __gnext, streamsize __n);
 151     strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg = 0);
 152     strstreambuf(const unsigned char* __gnext, streamsize __n);
 153
 154 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 155     _LIBCPP_INLINE_VISIBILITY
 156     strstreambuf(strstreambuf&& __rhs);
 157     _LIBCPP_INLINE_VISIBILITY
 158     strstreambuf& operator=(strstreambuf&& __rhs);
 159 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 160
 161     virtual ~strstreambuf();
 162
 163     void swap(strstreambuf& __rhs);
 164
 165     void freeze(bool __freezefl = true);
 166     char* str();
 167     int pcount() const;
 168
 169 protected:
 170     virtual int_type overflow (int_type __c = EOF);
 171     virtual int_type pbackfail(int_type __c = EOF);
 172     virtual int_type underflow();
 173     virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
 174                              ios_base::openmode __which = ios_base::in | ios_base::out);
 175     virtual pos_type seekpos(pos_type __sp,
 176                              ios_base::openmode __which = ios_base::in | ios_base::out);
 177
 178 private:
 179     typedef unsigned __mode_type;
 180     static const __mode_type __allocated = 0x01;
 181     static const __mode_type __constant  = 0x02;
 182     static const __mode_type __dynamic   = 0x04;
 183     static const __mode_type __frozen    = 0x08;
 184     static const streamsize    __default_alsize = 4096;
 185
 186     __mode_type __strmode_;
 187     streamsize __alsize_;
 188     void* (*__palloc_)(size_t);
 189     void (*__pfree_)(void*);
 190
 191     void __init(char* __gnext, streamsize __n, char* __pbeg);
 192 };
 193
 194 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 195
 196 inline _LIBCPP_INLINE_VISIBILITY
 197 strstreambuf::strstreambuf(strstreambuf&& __rhs)
 198     : streambuf(__rhs),
 199       __strmode_(__rhs.__strmode_),
 200       __alsize_(__rhs.__alsize_),
 201       __palloc_(__rhs.__palloc_),
 202       __pfree_(__rhs.__pfree_)
 203 {
 204     __rhs.setg(nullptr, nullptr, nullptr);
 205     __rhs.setp(nullptr, nullptr);
 206 }
 207
 208 inline _LIBCPP_INLINE_VISIBILITY
 209 strstreambuf&
 210 strstreambuf::operator=(strstreambuf&& __rhs)
 211 {
 212     if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0)
 213     {
 214         if (__pfree_)
 215             __pfree_(eback());
 216         else
 217             delete [] eback();
 218     }
 219     streambuf::operator=(__rhs);
 220     __strmode_ = __rhs.__strmode_;
 221     __alsize_ = __rhs.__alsize_;
 222     __palloc_ = __rhs.__palloc_;
 223     __pfree_ = __rhs.__pfree_;
 224     __rhs.setg(nullptr, nullptr, nullptr);
 225     __rhs.setp(nullptr, nullptr);
 226     return *this;
 227 }
 228
 229 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 230
 231 class _LIBCPP_TYPE_VIS istrstream
 232     : public istream
 233 {
 234 public:
 235     _LIBCPP_INLINE_VISIBILITY
 236     explicit istrstream(const char* __s)
 237         : istream(&__sb_), __sb_(__s, 0) {}
 238     _LIBCPP_INLINE_VISIBILITY
 239     explicit istrstream(char* __s)
 240         : istream(&__sb_), __sb_(__s, 0) {}
 241     _LIBCPP_INLINE_VISIBILITY
 242     istrstream(const char* __s, streamsize __n)
 243         : istream(&__sb_), __sb_(__s, __n) {}
 244     _LIBCPP_INLINE_VISIBILITY
 245     istrstream(char* __s, streamsize __n)
 246         : istream(&__sb_), __sb_(__s, __n) {}
 247
 248 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 249     _LIBCPP_INLINE_VISIBILITY
 250     istrstream(istrstream&& __rhs)
 251         : istream(_VSTD::move(__rhs)),
 252           __sb_(_VSTD::move(__rhs.__sb_))
 253     {
 254         istream::set_rdbuf(&__sb_);
 255     }
 256
 257     _LIBCPP_INLINE_VISIBILITY
 258     istrstream& operator=(istrstream&& __rhs)
 259     {
 260         istream::operator=(_VSTD::move(__rhs));
 261         __sb_ = _VSTD::move(__rhs.__sb_);
 262         return *this;
 263     }
 264 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 265
 266     virtual ~istrstream();
 267
 268     _LIBCPP_INLINE_VISIBILITY
 269     void swap(istrstream& __rhs)
 270     {
 271         istream::swap(__rhs);
 272         __sb_.swap(__rhs.__sb_);
 273     }
 274
 275     _LIBCPP_INLINE_VISIBILITY
 276     strstreambuf* rdbuf() const {return const_cast<strstreambuf*>(&__sb_);}
 277     _LIBCPP_INLINE_VISIBILITY
 278     char *str() {return __sb_.str();}
 279
 280 private:
 281     strstreambuf __sb_;
 282 };
 283
 284 class _LIBCPP_TYPE_VIS ostrstream
 285     : public ostream
 286 {
 287 public:
 288     _LIBCPP_INLINE_VISIBILITY
 289     ostrstream()
 290         : ostream(&__sb_) {}
 291     _LIBCPP_INLINE_VISIBILITY
 292     ostrstream(char* __s, int __n, ios_base::openmode __mode = ios_base::out)
 293         : ostream(&__sb_),
 294           __sb_(__s, __n, __s + (__mode & ios::app ? strlen(__s) : 0))
 295         {}
 296
 297 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 298     _LIBCPP_INLINE_VISIBILITY
 299     ostrstream(ostrstream&& __rhs)
 300         : ostream(_VSTD::move(__rhs)),
 301           __sb_(_VSTD::move(__rhs.__sb_))
 302     {
 303         ostream::set_rdbuf(&__sb_);
 304     }
 305
 306     _LIBCPP_INLINE_VISIBILITY
 307     ostrstream& operator=(ostrstream&& __rhs)
 308     {
 309         ostream::operator=(_VSTD::move(__rhs));
 310         __sb_ = _VSTD::move(__rhs.__sb_);
 311         return *this;
 312     }
 313 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 314
 315     virtual ~ostrstream();
 316
 317     _LIBCPP_INLINE_VISIBILITY
 318     void swap(ostrstream& __rhs)
 319     {
 320         ostream::swap(__rhs);
 321         __sb_.swap(__rhs.__sb_);
 322     }
 323
 324     _LIBCPP_INLINE_VISIBILITY
 325     strstreambuf* rdbuf() const {return const_cast<strstreambuf*>(&__sb_);}
 326     _LIBCPP_INLINE_VISIBILITY
 327     void freeze(bool __freezefl = true) {__sb_.freeze(__freezefl);}
 328     _LIBCPP_INLINE_VISIBILITY
 329     char* str()         {return __sb_.str();}
 330     _LIBCPP_INLINE_VISIBILITY
 331     int pcount() const  {return __sb_.pcount();}
 332
 333 private:
 334     strstreambuf __sb_; // exposition only
 335 };
 336
 337 class _LIBCPP_TYPE_VIS strstream
 338     : public iostream
 339 {
 340 public:
 341     // Types
 342     typedef char                        char_type;
 343     typedef char_traits<char>::int_type int_type;
 344     typedef char_traits<char>::pos_type pos_type;
 345     typedef char_traits<char>::off_type off_type;
 346
 347     // constructors/destructor
 348     _LIBCPP_INLINE_VISIBILITY
 349     strstream()
 350         : iostream(&__sb_) {}
 351     _LIBCPP_INLINE_VISIBILITY
 352     strstream(char* __s, int __n, ios_base::openmode __mode = ios_base::in | ios_base::out)
 353         : iostream(&__sb_),
 354           __sb_(__s, __n, __s + (__mode & ios::app ? strlen(__s) : 0))
 355         {}
 356
 357 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 358     _LIBCPP_INLINE_VISIBILITY
 359     strstream(strstream&& __rhs)
 360         : iostream(_VSTD::move(__rhs)),
 361           __sb_(_VSTD::move(__rhs.__sb_))
 362     {
 363         iostream::set_rdbuf(&__sb_);
 364     }
 365
 366     _LIBCPP_INLINE_VISIBILITY
 367     strstream& operator=(strstream&& __rhs)
 368     {
 369         iostream::operator=(_VSTD::move(__rhs));
 370         __sb_ = _VSTD::move(__rhs.__sb_);
 371         return *this;
 372     }
 373 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 374
 375     virtual ~strstream();
 376
 377     _LIBCPP_INLINE_VISIBILITY
 378     void swap(strstream& __rhs)
 379     {
 380         iostream::swap(__rhs);
 381         __sb_.swap(__rhs.__sb_);
 382     }
 383
 384     // Members:
 385     _LIBCPP_INLINE_VISIBILITY
 386     strstreambuf* rdbuf() const {return const_cast<strstreambuf*>(&__sb_);}
 387     _LIBCPP_INLINE_VISIBILITY
 388     void freeze(bool __freezefl = true) {__sb_.freeze(__freezefl);}
 389     _LIBCPP_INLINE_VISIBILITY
 390     int pcount() const {return __sb_.pcount();}
 391     _LIBCPP_INLINE_VISIBILITY
 392     char* str()        {return __sb_.str();}
 393
 394 private:
 395     strstreambuf __sb_; // exposition only
 396 };
 397
 398 _LIBCPP_END_NAMESPACE_STD
 399
 400 #endif  // _LIBCPP_STRSTREAM