1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_STRSTREAM 11#define _LIBCPP_STRSTREAM 12 13/* 14 strstream synopsis 15 16class strstreambuf 17 : public basic_streambuf<char> 18{ 19public: 20 explicit strstreambuf(streamsize alsize_arg = 0); // before C++20 21 strstreambuf() : strstreambuf(0) {} // C++20 22 explicit strstreambuf(streamsize alsize_arg); // C++20 23 24 strstreambuf(void* (*palloc_arg)(size_t), void (*pfree_arg)(void*)); 25 strstreambuf(char* gnext_arg, streamsize n, char* pbeg_arg = nullptr); 26 strstreambuf(const char* gnext_arg, streamsize n); 27 28 strstreambuf(signed char* gnext_arg, streamsize n, signed char* pbeg_arg = nullptr); 29 strstreambuf(const signed char* gnext_arg, streamsize n); 30 strstreambuf(unsigned char* gnext_arg, streamsize n, unsigned char* pbeg_arg = nullptr); 31 strstreambuf(const unsigned char* gnext_arg, streamsize n); 32 33 strstreambuf(strstreambuf&& rhs); 34 strstreambuf& operator=(strstreambuf&& rhs); 35 36 virtual ~strstreambuf(); 37 38 void swap(strstreambuf& rhs); 39 40 void freeze(bool freezefl = true); 41 char* str(); 42 int pcount() const; 43 44protected: 45 virtual int_type overflow (int_type c = EOF); 46 virtual int_type pbackfail(int_type c = EOF); 47 virtual int_type underflow(); 48 virtual pos_type seekoff(off_type off, ios_base::seekdir way, 49 ios_base::openmode which = ios_base::in | ios_base::out); 50 virtual pos_type seekpos(pos_type sp, 51 ios_base::openmode which = ios_base::in | ios_base::out); 52 virtual streambuf* setbuf(char* s, streamsize n); 53 54private: 55 typedef T1 strstate; // exposition only 56 static const strstate allocated; // exposition only 57 static const strstate constant; // exposition only 58 static const strstate dynamic; // exposition only 59 static const strstate frozen; // exposition only 60 strstate strmode; // exposition only 61 streamsize alsize; // exposition only 62 void* (*palloc)(size_t); // exposition only 63 void (*pfree)(void*); // exposition only 64}; 65 66class istrstream 67 : public basic_istream<char> 68{ 69public: 70 explicit istrstream(const char* s); 71 explicit istrstream(char* s); 72 istrstream(const char* s, streamsize n); 73 istrstream(char* s, streamsize n); 74 75 virtual ~istrstream(); 76 77 strstreambuf* rdbuf() const; 78 char *str(); 79 80private: 81 strstreambuf sb; // exposition only 82}; 83 84class ostrstream 85 : public basic_ostream<char> 86{ 87public: 88 ostrstream(); 89 ostrstream(char* s, int n, ios_base::openmode mode = ios_base::out); 90 91 virtual ~ostrstream(); 92 93 strstreambuf* rdbuf() const; 94 void freeze(bool freezefl = true); 95 char* str(); 96 int pcount() const; 97 98private: 99 strstreambuf sb; // exposition only 100}; 101 102class strstream 103 : public basic_iostream<char> 104{ 105public: 106 // Types 107 typedef char char_type; 108 typedef char_traits<char>::int_type int_type; 109 typedef char_traits<char>::pos_type pos_type; 110 typedef char_traits<char>::off_type off_type; 111 112 // constructors/destructor 113 strstream(); 114 strstream(char* s, int n, ios_base::openmode mode = ios_base::in | ios_base::out); 115 116 virtual ~strstream(); 117 118 // Members: 119 strstreambuf* rdbuf() const; 120 void freeze(bool freezefl = true); 121 int pcount() const; 122 char* str(); 123 124private: 125 strstreambuf sb; // exposition only 126}; 127 128} // std 129 130*/ 131 132#include <__assert> // all public C++ headers provide the assertion handler 133#include <__config> 134#include <istream> 135#include <ostream> 136#include <version> 137 138#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 139# pragma GCC system_header 140#endif 141 142_LIBCPP_PUSH_MACROS 143#include <__undef_macros> 144 145_LIBCPP_BEGIN_NAMESPACE_STD 146 147class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI strstreambuf : public streambuf { 148public: 149#ifndef _LIBCPP_CXX03_LANG 150 _LIBCPP_HIDE_FROM_ABI strstreambuf() : strstreambuf(0) {} 151 explicit strstreambuf(streamsize __alsize); 152#else 153 explicit strstreambuf(streamsize __alsize = 0); 154#endif 155 strstreambuf(void* (*__palloc)(size_t), void (*__pfree)(void*)); 156 strstreambuf(char* __gnext, streamsize __n, char* __pbeg = nullptr); 157 strstreambuf(const char* __gnext, streamsize __n); 158 159 strstreambuf(signed char* __gnext, streamsize __n, signed char* __pbeg = nullptr); 160 strstreambuf(const signed char* __gnext, streamsize __n); 161 strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg = nullptr); 162 strstreambuf(const unsigned char* __gnext, streamsize __n); 163 164#ifndef _LIBCPP_CXX03_LANG 165 _LIBCPP_HIDE_FROM_ABI strstreambuf(strstreambuf&& __rhs); 166 _LIBCPP_HIDE_FROM_ABI strstreambuf& operator=(strstreambuf&& __rhs); 167#endif // _LIBCPP_CXX03_LANG 168 169 ~strstreambuf() override; 170 171 void swap(strstreambuf& __rhs); 172 173 void freeze(bool __freezefl = true); 174 char* str(); 175 int pcount() const; 176 177protected: 178 int_type overflow(int_type __c = EOF) override; 179 int_type pbackfail(int_type __c = EOF) override; 180 int_type underflow() override; 181 pos_type 182 seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __which = ios_base::in | ios_base::out) override; 183 pos_type seekpos(pos_type __sp, ios_base::openmode __which = ios_base::in | ios_base::out) override; 184 185private: 186 typedef unsigned __mode_type; 187 static const __mode_type __allocated = 0x01; 188 static const __mode_type __constant = 0x02; 189 static const __mode_type __dynamic = 0x04; 190 static const __mode_type __frozen = 0x08; 191 static const streamsize __default_alsize = 4096; 192 193 __mode_type __strmode_; 194 streamsize __alsize_; 195 void* (*__palloc_)(size_t); 196 void (*__pfree_)(void*); 197 198 void __init(char* __gnext, streamsize __n, char* __pbeg); 199}; 200 201#ifndef _LIBCPP_CXX03_LANG 202 203inline _LIBCPP_HIDE_FROM_ABI strstreambuf::strstreambuf(strstreambuf&& __rhs) 204 : streambuf(__rhs), 205 __strmode_(__rhs.__strmode_), 206 __alsize_(__rhs.__alsize_), 207 __palloc_(__rhs.__palloc_), 208 __pfree_(__rhs.__pfree_) { 209 __rhs.setg(nullptr, nullptr, nullptr); 210 __rhs.setp(nullptr, nullptr); 211} 212 213inline _LIBCPP_HIDE_FROM_ABI strstreambuf& strstreambuf::operator=(strstreambuf&& __rhs) { 214 if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0) { 215 if (__pfree_) 216 __pfree_(eback()); 217 else 218 delete[] eback(); 219 } 220 streambuf::operator=(__rhs); 221 __strmode_ = __rhs.__strmode_; 222 __alsize_ = __rhs.__alsize_; 223 __palloc_ = __rhs.__palloc_; 224 __pfree_ = __rhs.__pfree_; 225 __rhs.setg(nullptr, nullptr, nullptr); 226 __rhs.setp(nullptr, nullptr); 227 return *this; 228} 229 230#endif // _LIBCPP_CXX03_LANG 231 232class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI istrstream : public istream { 233public: 234 _LIBCPP_HIDE_FROM_ABI explicit istrstream(const char* __s) : istream(&__sb_), __sb_(__s, 0) {} 235 _LIBCPP_HIDE_FROM_ABI explicit istrstream(char* __s) : istream(&__sb_), __sb_(__s, 0) {} 236 _LIBCPP_HIDE_FROM_ABI istrstream(const char* __s, streamsize __n) : istream(&__sb_), __sb_(__s, __n) {} 237 _LIBCPP_HIDE_FROM_ABI istrstream(char* __s, streamsize __n) : istream(&__sb_), __sb_(__s, __n) {} 238 239#ifndef _LIBCPP_CXX03_LANG 240 _LIBCPP_HIDE_FROM_ABI istrstream(istrstream&& __rhs) // extension 241 : istream(std::move(static_cast<istream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) { 242 istream::set_rdbuf(&__sb_); 243 } 244 245 _LIBCPP_HIDE_FROM_ABI istrstream& operator=(istrstream&& __rhs) { 246 __sb_ = std::move(__rhs.__sb_); 247 istream::operator=(std::move(__rhs)); 248 return *this; 249 } 250#endif // _LIBCPP_CXX03_LANG 251 252 ~istrstream() override; 253 254 _LIBCPP_HIDE_FROM_ABI void swap(istrstream& __rhs) { 255 istream::swap(__rhs); 256 __sb_.swap(__rhs.__sb_); 257 } 258 259 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); } 260 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); } 261 262private: 263 strstreambuf __sb_; 264}; 265 266class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI ostrstream : public ostream { 267public: 268 _LIBCPP_HIDE_FROM_ABI ostrstream() : ostream(&__sb_) {} 269 _LIBCPP_HIDE_FROM_ABI ostrstream(char* __s, int __n, ios_base::openmode __mode = ios_base::out) 270 : ostream(&__sb_), __sb_(__s, __n, __s + (__mode & ios::app ? std::strlen(__s) : 0)) {} 271 272#ifndef _LIBCPP_CXX03_LANG 273 _LIBCPP_HIDE_FROM_ABI ostrstream(ostrstream&& __rhs) // extension 274 : ostream(std::move(static_cast<ostream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) { 275 ostream::set_rdbuf(&__sb_); 276 } 277 278 _LIBCPP_HIDE_FROM_ABI ostrstream& operator=(ostrstream&& __rhs) { 279 __sb_ = std::move(__rhs.__sb_); 280 ostream::operator=(std::move(__rhs)); 281 return *this; 282 } 283#endif // _LIBCPP_CXX03_LANG 284 285 ~ostrstream() override; 286 287 _LIBCPP_HIDE_FROM_ABI void swap(ostrstream& __rhs) { 288 ostream::swap(__rhs); 289 __sb_.swap(__rhs.__sb_); 290 } 291 292 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); } 293 _LIBCPP_HIDE_FROM_ABI void freeze(bool __freezefl = true) { __sb_.freeze(__freezefl); } 294 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); } 295 _LIBCPP_HIDE_FROM_ABI int pcount() const { return __sb_.pcount(); } 296 297private: 298 strstreambuf __sb_; // exposition only 299}; 300 301class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI strstream : public iostream { 302public: 303 // Types 304 typedef char char_type; 305 typedef char_traits<char>::int_type int_type; 306 typedef char_traits<char>::pos_type pos_type; 307 typedef char_traits<char>::off_type off_type; 308 309 // constructors/destructor 310 _LIBCPP_HIDE_FROM_ABI strstream() : iostream(&__sb_) {} 311 _LIBCPP_HIDE_FROM_ABI strstream(char* __s, int __n, ios_base::openmode __mode = ios_base::in | ios_base::out) 312 : iostream(&__sb_), __sb_(__s, __n, __s + (__mode & ios::app ? std::strlen(__s) : 0)) {} 313 314#ifndef _LIBCPP_CXX03_LANG 315 _LIBCPP_HIDE_FROM_ABI strstream(strstream&& __rhs) // extension 316 : iostream(std::move(static_cast<iostream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) { 317 iostream::set_rdbuf(&__sb_); 318 } 319 320 _LIBCPP_HIDE_FROM_ABI strstream& operator=(strstream&& __rhs) { 321 __sb_ = std::move(__rhs.__sb_); 322 iostream::operator=(std::move(__rhs)); 323 return *this; 324 } 325#endif // _LIBCPP_CXX03_LANG 326 327 ~strstream() override; 328 329 _LIBCPP_HIDE_FROM_ABI void swap(strstream& __rhs) { 330 iostream::swap(__rhs); 331 __sb_.swap(__rhs.__sb_); 332 } 333 334 // Members: 335 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); } 336 _LIBCPP_HIDE_FROM_ABI void freeze(bool __freezefl = true) { __sb_.freeze(__freezefl); } 337 _LIBCPP_HIDE_FROM_ABI int pcount() const { return __sb_.pcount(); } 338 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); } 339 340private: 341 strstreambuf __sb_; // exposition only 342}; 343 344_LIBCPP_END_NAMESPACE_STD 345 346_LIBCPP_POP_MACROS 347 348#endif // _LIBCPP_STRSTREAM 349