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_BEGIN_NAMESPACE_STD 143 144class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI strstreambuf : public streambuf { 145public: 146#ifndef _LIBCPP_CXX03_LANG 147 _LIBCPP_HIDE_FROM_ABI strstreambuf() : strstreambuf(0) {} 148 explicit strstreambuf(streamsize __alsize); 149#else 150 explicit strstreambuf(streamsize __alsize = 0); 151#endif 152 strstreambuf(void* (*__palloc)(size_t), void (*__pfree)(void*)); 153 strstreambuf(char* __gnext, streamsize __n, char* __pbeg = nullptr); 154 strstreambuf(const char* __gnext, streamsize __n); 155 156 strstreambuf(signed char* __gnext, streamsize __n, signed char* __pbeg = nullptr); 157 strstreambuf(const signed char* __gnext, streamsize __n); 158 strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg = nullptr); 159 strstreambuf(const unsigned char* __gnext, streamsize __n); 160 161#ifndef _LIBCPP_CXX03_LANG 162 _LIBCPP_HIDE_FROM_ABI strstreambuf(strstreambuf&& __rhs); 163 _LIBCPP_HIDE_FROM_ABI strstreambuf& operator=(strstreambuf&& __rhs); 164#endif // _LIBCPP_CXX03_LANG 165 166 ~strstreambuf() override; 167 168 void swap(strstreambuf& __rhs); 169 170 void freeze(bool __freezefl = true); 171 char* str(); 172 int pcount() const; 173 174protected: 175 int_type overflow(int_type __c = EOF) override; 176 int_type pbackfail(int_type __c = EOF) override; 177 int_type underflow() override; 178 pos_type 179 seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __which = ios_base::in | ios_base::out) override; 180 pos_type seekpos(pos_type __sp, ios_base::openmode __which = ios_base::in | ios_base::out) override; 181 182private: 183 typedef unsigned __mode_type; 184 static const __mode_type __allocated = 0x01; 185 static const __mode_type __constant = 0x02; 186 static const __mode_type __dynamic = 0x04; 187 static const __mode_type __frozen = 0x08; 188 static const streamsize __default_alsize = 4096; 189 190 __mode_type __strmode_; 191 streamsize __alsize_; 192 void* (*__palloc_)(size_t); 193 void (*__pfree_)(void*); 194 195 void __init(char* __gnext, streamsize __n, char* __pbeg); 196}; 197 198#ifndef _LIBCPP_CXX03_LANG 199 200inline _LIBCPP_HIDE_FROM_ABI strstreambuf::strstreambuf(strstreambuf&& __rhs) 201 : streambuf(__rhs), 202 __strmode_(__rhs.__strmode_), 203 __alsize_(__rhs.__alsize_), 204 __palloc_(__rhs.__palloc_), 205 __pfree_(__rhs.__pfree_) { 206 __rhs.setg(nullptr, nullptr, nullptr); 207 __rhs.setp(nullptr, nullptr); 208} 209 210inline _LIBCPP_HIDE_FROM_ABI strstreambuf& strstreambuf::operator=(strstreambuf&& __rhs) { 211 if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0) { 212 if (__pfree_) 213 __pfree_(eback()); 214 else 215 delete[] eback(); 216 } 217 streambuf::operator=(__rhs); 218 __strmode_ = __rhs.__strmode_; 219 __alsize_ = __rhs.__alsize_; 220 __palloc_ = __rhs.__palloc_; 221 __pfree_ = __rhs.__pfree_; 222 __rhs.setg(nullptr, nullptr, nullptr); 223 __rhs.setp(nullptr, nullptr); 224 return *this; 225} 226 227#endif // _LIBCPP_CXX03_LANG 228 229class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI istrstream : public istream { 230public: 231 _LIBCPP_HIDE_FROM_ABI explicit istrstream(const char* __s) : istream(&__sb_), __sb_(__s, 0) {} 232 _LIBCPP_HIDE_FROM_ABI explicit istrstream(char* __s) : istream(&__sb_), __sb_(__s, 0) {} 233 _LIBCPP_HIDE_FROM_ABI istrstream(const char* __s, streamsize __n) : istream(&__sb_), __sb_(__s, __n) {} 234 _LIBCPP_HIDE_FROM_ABI istrstream(char* __s, streamsize __n) : istream(&__sb_), __sb_(__s, __n) {} 235 236#ifndef _LIBCPP_CXX03_LANG 237 _LIBCPP_HIDE_FROM_ABI istrstream(istrstream&& __rhs) // extension 238 : istream(std::move(static_cast<istream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) { 239 istream::set_rdbuf(&__sb_); 240 } 241 242 _LIBCPP_HIDE_FROM_ABI istrstream& operator=(istrstream&& __rhs) { 243 __sb_ = std::move(__rhs.__sb_); 244 istream::operator=(std::move(__rhs)); 245 return *this; 246 } 247#endif // _LIBCPP_CXX03_LANG 248 249 ~istrstream() override; 250 251 _LIBCPP_HIDE_FROM_ABI void swap(istrstream& __rhs) { 252 istream::swap(__rhs); 253 __sb_.swap(__rhs.__sb_); 254 } 255 256 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); } 257 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); } 258 259private: 260 strstreambuf __sb_; 261}; 262 263class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI ostrstream : public ostream { 264public: 265 _LIBCPP_HIDE_FROM_ABI ostrstream() : ostream(&__sb_) {} 266 _LIBCPP_HIDE_FROM_ABI ostrstream(char* __s, int __n, ios_base::openmode __mode = ios_base::out) 267 : ostream(&__sb_), __sb_(__s, __n, __s + (__mode & ios::app ? std::strlen(__s) : 0)) {} 268 269#ifndef _LIBCPP_CXX03_LANG 270 _LIBCPP_HIDE_FROM_ABI ostrstream(ostrstream&& __rhs) // extension 271 : ostream(std::move(static_cast<ostream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) { 272 ostream::set_rdbuf(&__sb_); 273 } 274 275 _LIBCPP_HIDE_FROM_ABI ostrstream& operator=(ostrstream&& __rhs) { 276 __sb_ = std::move(__rhs.__sb_); 277 ostream::operator=(std::move(__rhs)); 278 return *this; 279 } 280#endif // _LIBCPP_CXX03_LANG 281 282 ~ostrstream() override; 283 284 _LIBCPP_HIDE_FROM_ABI void swap(ostrstream& __rhs) { 285 ostream::swap(__rhs); 286 __sb_.swap(__rhs.__sb_); 287 } 288 289 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); } 290 _LIBCPP_HIDE_FROM_ABI void freeze(bool __freezefl = true) { __sb_.freeze(__freezefl); } 291 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); } 292 _LIBCPP_HIDE_FROM_ABI int pcount() const { return __sb_.pcount(); } 293 294private: 295 strstreambuf __sb_; // exposition only 296}; 297 298class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI strstream : public iostream { 299public: 300 // Types 301 typedef char char_type; 302 typedef char_traits<char>::int_type int_type; 303 typedef char_traits<char>::pos_type pos_type; 304 typedef char_traits<char>::off_type off_type; 305 306 // constructors/destructor 307 _LIBCPP_HIDE_FROM_ABI strstream() : iostream(&__sb_) {} 308 _LIBCPP_HIDE_FROM_ABI strstream(char* __s, int __n, ios_base::openmode __mode = ios_base::in | ios_base::out) 309 : iostream(&__sb_), __sb_(__s, __n, __s + (__mode & ios::app ? std::strlen(__s) : 0)) {} 310 311#ifndef _LIBCPP_CXX03_LANG 312 _LIBCPP_HIDE_FROM_ABI strstream(strstream&& __rhs) // extension 313 : iostream(std::move(static_cast<iostream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) { 314 iostream::set_rdbuf(&__sb_); 315 } 316 317 _LIBCPP_HIDE_FROM_ABI strstream& operator=(strstream&& __rhs) { 318 __sb_ = std::move(__rhs.__sb_); 319 iostream::operator=(std::move(__rhs)); 320 return *this; 321 } 322#endif // _LIBCPP_CXX03_LANG 323 324 ~strstream() override; 325 326 _LIBCPP_HIDE_FROM_ABI void swap(strstream& __rhs) { 327 iostream::swap(__rhs); 328 __sb_.swap(__rhs.__sb_); 329 } 330 331 // Members: 332 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); } 333 _LIBCPP_HIDE_FROM_ABI void freeze(bool __freezefl = true) { __sb_.freeze(__freezefl); } 334 _LIBCPP_HIDE_FROM_ABI int pcount() const { return __sb_.pcount(); } 335 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); } 336 337private: 338 strstreambuf __sb_; // exposition only 339}; 340 341_LIBCPP_END_NAMESPACE_STD 342 343#endif // _LIBCPP_STRSTREAM 344