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 // Removed in C++26
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 // Removed in C++26
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 // Removed in C++26
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 // Removed in C++26
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 <__config>
133#include <istream>
134#include <ostream>
135#include <version>
136
137#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
138# pragma GCC system_header
139#endif
140
141#if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM) || defined(_LIBCPP_BUILDING_LIBRARY)
142
143_LIBCPP_PUSH_MACROS
144# include <__undef_macros>
145
146_LIBCPP_BEGIN_NAMESPACE_STD
147
148class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI strstreambuf : public streambuf {
149public:
150# ifndef _LIBCPP_CXX03_LANG
151 _LIBCPP_HIDE_FROM_ABI strstreambuf() : strstreambuf(0) {}
152 explicit strstreambuf(streamsize __alsize);
153# else
154 explicit strstreambuf(streamsize __alsize = 0);
155# endif
156 strstreambuf(void* (*__palloc)(size_t), void (*__pfree)(void*));
157 strstreambuf(char* __gnext, streamsize __n, char* __pbeg = nullptr);
158 strstreambuf(const char* __gnext, streamsize __n);
159
160 strstreambuf(signed char* __gnext, streamsize __n, signed char* __pbeg = nullptr);
161 strstreambuf(const signed char* __gnext, streamsize __n);
162 strstreambuf(unsigned char* __gnext, streamsize __n, unsigned char* __pbeg = nullptr);
163 strstreambuf(const unsigned char* __gnext, streamsize __n);
164
165# ifndef _LIBCPP_CXX03_LANG
166 _LIBCPP_HIDE_FROM_ABI strstreambuf(strstreambuf&& __rhs);
167 _LIBCPP_HIDE_FROM_ABI strstreambuf& operator=(strstreambuf&& __rhs);
168# endif // _LIBCPP_CXX03_LANG
169
170 ~strstreambuf() override;
171
172 void swap(strstreambuf& __rhs);
173
174 void freeze(bool __freezefl = true);
175 char* str();
176 int pcount() const;
177
178protected:
179 int_type overflow(int_type __c = EOF) override;
180 int_type pbackfail(int_type __c = EOF) override;
181 int_type underflow() override;
182 pos_type
183 seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __which = ios_base::in | ios_base::out) override;
184 pos_type seekpos(pos_type __sp, ios_base::openmode __which = ios_base::in | ios_base::out) override;
185
186private:
187 typedef unsigned __mode_type;
188 static const __mode_type __allocated = 0x01;
189 static const __mode_type __constant = 0x02;
190 static const __mode_type __dynamic = 0x04;
191 static const __mode_type __frozen = 0x08;
192 static const streamsize __default_alsize = 4096;
193
194 __mode_type __strmode_;
195 streamsize __alsize_;
196 void* (*__palloc_)(size_t);
197 void (*__pfree_)(void*);
198
199 void __init(char* __gnext, streamsize __n, char* __pbeg);
200};
201
202# ifndef _LIBCPP_CXX03_LANG
203
204inline _LIBCPP_HIDE_FROM_ABI strstreambuf::strstreambuf(strstreambuf&& __rhs)
205 : streambuf(__rhs),
206 __strmode_(__rhs.__strmode_),
207 __alsize_(__rhs.__alsize_),
208 __palloc_(__rhs.__palloc_),
209 __pfree_(__rhs.__pfree_) {
210 __rhs.setg(nullptr, nullptr, nullptr);
211 __rhs.setp(nullptr, nullptr);
212}
213
214inline _LIBCPP_HIDE_FROM_ABI strstreambuf& strstreambuf::operator=(strstreambuf&& __rhs) {
215 if (eback() && (__strmode_ & __allocated) != 0 && (__strmode_ & __frozen) == 0) {
216 if (__pfree_)
217 __pfree_(eback());
218 else
219 delete[] eback();
220 }
221 streambuf::operator=(__rhs);
222 __strmode_ = __rhs.__strmode_;
223 __alsize_ = __rhs.__alsize_;
224 __palloc_ = __rhs.__palloc_;
225 __pfree_ = __rhs.__pfree_;
226 __rhs.setg(nullptr, nullptr, nullptr);
227 __rhs.setp(nullptr, nullptr);
228 return *this;
229}
230
231# endif // _LIBCPP_CXX03_LANG
232
233class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI istrstream : public istream {
234public:
235 _LIBCPP_HIDE_FROM_ABI explicit istrstream(const char* __s) : istream(&__sb_), __sb_(__s, 0) {}
236 _LIBCPP_HIDE_FROM_ABI explicit istrstream(char* __s) : istream(&__sb_), __sb_(__s, 0) {}
237 _LIBCPP_HIDE_FROM_ABI istrstream(const char* __s, streamsize __n) : istream(&__sb_), __sb_(__s, __n) {}
238 _LIBCPP_HIDE_FROM_ABI istrstream(char* __s, streamsize __n) : istream(&__sb_), __sb_(__s, __n) {}
239
240# ifndef _LIBCPP_CXX03_LANG
241 _LIBCPP_HIDE_FROM_ABI istrstream(istrstream&& __rhs) // extension
242 : istream(std::move(static_cast<istream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) {
243 istream::set_rdbuf(&__sb_);
244 }
245
246 _LIBCPP_HIDE_FROM_ABI istrstream& operator=(istrstream&& __rhs) {
247 __sb_ = std::move(__rhs.__sb_);
248 istream::operator=(std::move(__rhs));
249 return *this;
250 }
251# endif // _LIBCPP_CXX03_LANG
252
253 ~istrstream() override;
254
255 _LIBCPP_HIDE_FROM_ABI void swap(istrstream& __rhs) {
256 istream::swap(__rhs);
257 __sb_.swap(__rhs.__sb_);
258 }
259
260 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); }
261 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); }
262
263private:
264 strstreambuf __sb_;
265};
266
267class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI ostrstream : public ostream {
268public:
269 _LIBCPP_HIDE_FROM_ABI ostrstream() : ostream(&__sb_) {}
270 _LIBCPP_HIDE_FROM_ABI ostrstream(char* __s, int __n, ios_base::openmode __mode = ios_base::out)
271 : ostream(&__sb_), __sb_(__s, __n, __s + (__mode & ios::app ? std::strlen(__s) : 0)) {}
272
273# ifndef _LIBCPP_CXX03_LANG
274 _LIBCPP_HIDE_FROM_ABI ostrstream(ostrstream&& __rhs) // extension
275 : ostream(std::move(static_cast<ostream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) {
276 ostream::set_rdbuf(&__sb_);
277 }
278
279 _LIBCPP_HIDE_FROM_ABI ostrstream& operator=(ostrstream&& __rhs) {
280 __sb_ = std::move(__rhs.__sb_);
281 ostream::operator=(std::move(__rhs));
282 return *this;
283 }
284# endif // _LIBCPP_CXX03_LANG
285
286 ~ostrstream() override;
287
288 _LIBCPP_HIDE_FROM_ABI void swap(ostrstream& __rhs) {
289 ostream::swap(__rhs);
290 __sb_.swap(__rhs.__sb_);
291 }
292
293 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); }
294 _LIBCPP_HIDE_FROM_ABI void freeze(bool __freezefl = true) { __sb_.freeze(__freezefl); }
295 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); }
296 _LIBCPP_HIDE_FROM_ABI int pcount() const { return __sb_.pcount(); }
297
298private:
299 strstreambuf __sb_; // exposition only
300};
301
302class _LIBCPP_DEPRECATED _LIBCPP_EXPORTED_FROM_ABI strstream : public iostream {
303public:
304 // Types
305 typedef char char_type;
306 typedef char_traits<char>::int_type int_type;
307 typedef char_traits<char>::pos_type pos_type;
308 typedef char_traits<char>::off_type off_type;
309
310 // constructors/destructor
311 _LIBCPP_HIDE_FROM_ABI strstream() : iostream(&__sb_) {}
312 _LIBCPP_HIDE_FROM_ABI strstream(char* __s, int __n, ios_base::openmode __mode = ios_base::in | ios_base::out)
313 : iostream(&__sb_), __sb_(__s, __n, __s + (__mode & ios::app ? std::strlen(__s) : 0)) {}
314
315# ifndef _LIBCPP_CXX03_LANG
316 _LIBCPP_HIDE_FROM_ABI strstream(strstream&& __rhs) // extension
317 : iostream(std::move(static_cast<iostream&>(__rhs))), __sb_(std::move(__rhs.__sb_)) {
318 iostream::set_rdbuf(&__sb_);
319 }
320
321 _LIBCPP_HIDE_FROM_ABI strstream& operator=(strstream&& __rhs) {
322 __sb_ = std::move(__rhs.__sb_);
323 iostream::operator=(std::move(__rhs));
324 return *this;
325 }
326# endif // _LIBCPP_CXX03_LANG
327
328 ~strstream() override;
329
330 _LIBCPP_HIDE_FROM_ABI void swap(strstream& __rhs) {
331 iostream::swap(__rhs);
332 __sb_.swap(__rhs.__sb_);
333 }
334
335 // Members:
336 _LIBCPP_HIDE_FROM_ABI strstreambuf* rdbuf() const { return const_cast<strstreambuf*>(&__sb_); }
337 _LIBCPP_HIDE_FROM_ABI void freeze(bool __freezefl = true) { __sb_.freeze(__freezefl); }
338 _LIBCPP_HIDE_FROM_ABI int pcount() const { return __sb_.pcount(); }
339 _LIBCPP_HIDE_FROM_ABI char* str() { return __sb_.str(); }
340
341private:
342 strstreambuf __sb_; // exposition only
343};
344
345_LIBCPP_END_NAMESPACE_STD
346
347_LIBCPP_POP_MACROS
348
349#endif // _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM) || defined(_LIBCPP_BUILDING_LIBRARY)
350
351#endif // _LIBCPP_STRSTREAM
352