build/stlport/src/strstream.cpp@129ffea94266
build/stlport/src/strstream.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright (c) 1999
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Copyright (c) 1999
6 * Boris Fomitchev
7 *
8 * This material is provided "as is", with absolutely no warranty expressed
9 * or implied. Any use is at your own risk.
10 *
11 * Permission to use or copy this software for any purpose is hereby granted
12 * without fee, provided the above notices are retained on all copies.
13 * Permission to modify the code and to distribute modified code is granted,
14 * provided the above notices are retained, and a notice that the code was
15 * modified is included with the above copyright notice.
16 *
17 */
19 // Implementation of the classes in header <strstream>.
20 // WARNING: The classes defined in <strstream> are DEPRECATED. This
21 // header is defined in section D.7.1 of the C++ standard, and it
22 // MAY BE REMOVED in a future standard revision. You should use the
23 // header <sstream> instead.
25 #include "stlport_prefix.h"
27 #include <strstream>
28 #include <algorithm>
29 #include <limits>
31 _STLP_BEGIN_NAMESPACE
33 // strstreambuf constructor, destructor.
34 strstreambuf::strstreambuf(streamsize initial_capacity)
35 : _M_alloc_fun(0), _M_free_fun(0),
36 _M_dynamic(true), _M_frozen(false), _M_constant(false) {
37 size_t n = (sizeof(streamsize) > sizeof(size_t)) ? __STATIC_CAST(size_t, (min)(__STATIC_CAST(streamsize, (numeric_limits<size_t>::max)()),
38 (max)(initial_capacity, streamsize(16))))
39 : __STATIC_CAST(size_t, (max)(initial_capacity, streamsize(16)));
41 char* buf = _M_alloc(n);
42 if (buf) {
43 setp(buf, buf + n);
44 setg(buf, buf, buf);
45 }
46 }
48 strstreambuf::strstreambuf(__alloc_fn alloc_f, __free_fn free_f)
49 : _M_alloc_fun(alloc_f), _M_free_fun(free_f),
50 _M_dynamic(true), _M_frozen(false), _M_constant(false) {
51 size_t n = 16;
53 char* buf = _M_alloc(n);
54 if (buf) {
55 setp(buf, buf + n);
56 setg(buf, buf, buf);
57 }
58 }
60 strstreambuf::strstreambuf(char* get, streamsize n, char* put)
61 : _M_alloc_fun(0), _M_free_fun(0),
62 _M_dynamic(false), _M_frozen(false), _M_constant(false) {
63 _M_setup(get, put, n);
64 }
66 strstreambuf::strstreambuf(signed char* get, streamsize n, signed char* put)
67 : _M_alloc_fun(0), _M_free_fun(0),
68 _M_dynamic(false), _M_frozen(false), _M_constant(false) {
69 _M_setup(__REINTERPRET_CAST(char*,get), __REINTERPRET_CAST(char*,put), n);
70 }
72 strstreambuf::strstreambuf(unsigned char* get, streamsize n,
73 unsigned char* put)
74 : _M_alloc_fun(0), _M_free_fun(0),
75 _M_dynamic(false), _M_frozen(false), _M_constant(false) {
76 _M_setup(__REINTERPRET_CAST(char*,get), __REINTERPRET_CAST(char*,put), n);
77 }
79 strstreambuf::strstreambuf(const char* get, streamsize n)
80 : _M_alloc_fun(0), _M_free_fun(0),
81 _M_dynamic(false), _M_frozen(false), _M_constant(true) {
82 _M_setup(__CONST_CAST(char*,get), 0, n);
83 }
85 strstreambuf::strstreambuf(const signed char* get, streamsize n)
86 : _M_alloc_fun(0), _M_free_fun(0),
87 _M_dynamic(false), _M_frozen(false), _M_constant(true) {
88 _M_setup(__REINTERPRET_CAST(char*, __CONST_CAST(signed char*,get)), 0, n);
89 }
91 strstreambuf::strstreambuf(const unsigned char* get, streamsize n)
92 : _M_alloc_fun(0), _M_free_fun(0),
93 _M_dynamic(false), _M_frozen(false), _M_constant(true) {
94 _M_setup(__REINTERPRET_CAST(char*, __CONST_CAST(unsigned char*,get)), 0, n);
95 }
97 strstreambuf::~strstreambuf() {
98 if (_M_dynamic && !_M_frozen)
99 _M_free(eback());
100 }
102 void strstreambuf::freeze(bool frozenflag) {
103 if (_M_dynamic)
104 _M_frozen = frozenflag;
105 }
107 char* strstreambuf::str() {
108 freeze(true);
109 return eback();
110 }
112 int strstreambuf::pcount() const {
113 return int(pptr() ? pptr() - pbase() : 0);
114 }
116 strstreambuf::int_type strstreambuf::overflow(int_type c) {
117 if (c == traits_type::eof())
118 return traits_type::not_eof(c);
120 // Try to expand the buffer.
121 if (pptr() == epptr() && _M_dynamic && !_M_frozen && !_M_constant) {
122 ptrdiff_t old_size = epptr() - pbase();
123 ptrdiff_t new_size = (max)(2 * old_size, ptrdiff_t(1));
125 char* buf = _M_alloc(new_size);
126 if (buf) {
127 memcpy(buf, pbase(), old_size);
129 char* old_buffer = pbase();
130 bool reposition_get = false;
131 ptrdiff_t old_get_offset;
132 if (gptr() != 0) {
133 reposition_get = true;
134 old_get_offset = gptr() - eback();
135 }
137 setp(buf, buf + new_size);
138 pbump((int)old_size);
140 if (reposition_get)
141 setg(buf, buf + old_get_offset, buf + (max)(old_get_offset, old_size));
143 _M_free(old_buffer);
144 }
145 }
147 if (pptr() != epptr()) {
148 *pptr() = traits_type::to_char_type(c);
149 pbump(1);
150 return c;
151 }
152 else
153 return traits_type::eof();
154 }
156 strstreambuf::int_type strstreambuf::pbackfail(int_type c) {
157 if (gptr() != eback()) {
158 if (c == traits_type::eof()) {
159 gbump(-1);
160 return traits_type::not_eof(c);
161 }
162 else if (c == gptr()[-1]) {
163 gbump(-1);
164 return c;
165 }
166 else if (!_M_constant) {
167 gbump(-1);
168 *gptr() = traits_type::to_char_type(c);
169 return c;
170 }
171 }
173 return traits_type::eof();
174 }
176 strstreambuf::int_type strstreambuf::underflow() {
177 if (gptr() == egptr() && pptr() && pptr() > egptr())
178 setg(eback(), gptr(), pptr());
180 if (gptr() != egptr())
181 return (unsigned char) *gptr();
182 else
183 return _Traits::eof();
184 }
186 basic_streambuf<char, char_traits<char> >*
187 strstreambuf::setbuf(char*, streamsize) {
188 return this;
189 }
191 strstreambuf::pos_type
192 strstreambuf::seekoff(off_type off,
193 ios_base::seekdir dir, ios_base::openmode mode) {
194 bool do_get = false;
195 bool do_put = false;
197 if ((mode & (ios_base::in | ios_base::out)) ==
198 (ios_base::in | ios_base::out) &&
199 (dir == ios_base::beg || dir == ios_base::end))
200 do_get = do_put = true;
201 else if (mode & ios_base::in)
202 do_get = true;
203 else if (mode & ios_base::out)
204 do_put = true;
206 // !gptr() is here because, according to D.7.1 paragraph 4, the seekable
207 // area is undefined if there is no get area.
208 if ((!do_get && !do_put) || (do_put && !pptr()) || !gptr())
209 return pos_type(off_type(-1));
211 char* seeklow = eback();
212 char* seekhigh = epptr() ? epptr() : egptr();
214 off_type newoff;
215 switch(dir) {
216 case ios_base::beg:
217 newoff = 0;
218 break;
219 case ios_base::end:
220 newoff = seekhigh - seeklow;
221 break;
222 case ios_base::cur:
223 newoff = do_put ? pptr() - seeklow : gptr() - seeklow;
224 break;
225 default:
226 return pos_type(off_type(-1));
227 }
229 off += newoff;
230 if (off < 0 || off > seekhigh - seeklow)
231 return pos_type(off_type(-1));
233 if (do_put) {
234 if (seeklow + __STATIC_CAST(ptrdiff_t, off) < pbase()) {
235 setp(seeklow, epptr());
236 pbump((int)off);
237 }
238 else {
239 setp(pbase(), epptr());
240 pbump((int)(off - (pbase() - seeklow)));
241 }
242 }
243 if (do_get) {
244 if (off <= egptr() - seeklow)
245 setg(seeklow, seeklow + __STATIC_CAST(ptrdiff_t, off), egptr());
246 else if (off <= pptr() - seeklow)
247 setg(seeklow, seeklow + __STATIC_CAST(ptrdiff_t, off), pptr());
248 else
249 setg(seeklow, seeklow + __STATIC_CAST(ptrdiff_t, off), epptr());
250 }
252 return pos_type(newoff);
253 }
255 strstreambuf::pos_type
256 strstreambuf::seekpos(pos_type pos, ios_base::openmode mode) {
257 return seekoff(pos - pos_type(off_type(0)), ios_base::beg, mode);
258 }
261 char* strstreambuf::_M_alloc(size_t n) {
262 if (_M_alloc_fun)
263 return __STATIC_CAST(char*,_M_alloc_fun(n));
264 else
265 return new char[n];
266 }
268 void strstreambuf::_M_free(char* p) {
269 if (p) {
270 if (_M_free_fun)
271 _M_free_fun(p);
272 else
273 delete[] p;
274 }
275 }
277 void strstreambuf::_M_setup(char* get, char* put, streamsize n) {
278 if (get) {
279 size_t N = n > 0 ? size_t(n) : n == 0 ? strlen(get) : size_t(INT_MAX);
281 if (put) {
282 setg(get, get, get + N);
283 setp(put, put + N);
284 }
285 else {
286 setg(get, get, get + N);
287 }
288 }
289 }
291 //----------------------------------------------------------------------
292 // Class istrstream
294 istrstream::istrstream(char* s)
295 : basic_istream<char, char_traits<char> >(0), _M_buf(s, 0) {
296 this->init(&_M_buf);
297 }
299 istrstream::istrstream(const char* s)
300 : basic_istream<char, char_traits<char> >(0), _M_buf(s, 0) {
301 this->init(&_M_buf);
302 }
304 istrstream::istrstream(char* s, streamsize n)
305 : basic_istream<char, char_traits<char> >(0), _M_buf(s, n) {
306 this->init(&_M_buf);
307 }
309 istrstream::istrstream(const char* s, streamsize n)
310 : basic_istream<char, char_traits<char> >(0), _M_buf(s, n) {
311 this->init(&_M_buf);
312 }
314 istrstream::~istrstream() {}
316 strstreambuf* istrstream::rdbuf() const {
317 return __CONST_CAST(strstreambuf*,&_M_buf);
318 }
320 char* istrstream::str() { return _M_buf.str(); }
322 //----------------------------------------------------------------------
323 // Class ostrstream
325 ostrstream::ostrstream()
326 : basic_ostream<char, char_traits<char> >(0), _M_buf() {
327 basic_ios<char, char_traits<char> >::init(&_M_buf);
328 }
330 ostrstream::ostrstream(char* s, int n, ios_base::openmode mode)
331 : basic_ostream<char, char_traits<char> >(0),
332 _M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s) {
333 basic_ios<char, char_traits<char> >::init(&_M_buf);
334 }
336 ostrstream::~ostrstream() {}
338 strstreambuf* ostrstream::rdbuf() const {
339 return __CONST_CAST(strstreambuf*,&_M_buf);
340 }
342 void ostrstream::freeze(bool freezeflag) {
343 _M_buf.freeze(freezeflag);
344 }
346 char* ostrstream::str() {
347 return _M_buf.str();
348 }
350 int ostrstream::pcount() const {
351 return _M_buf.pcount();
352 }
355 //----------------------------------------------------------------------
356 // Class strstream
358 strstream::strstream()
359 : basic_iostream<char, char_traits<char> >(0), _M_buf() {
360 basic_ios<char, char_traits<char> >::init(&_M_buf);
361 }
363 strstream::strstream(char* s, int n, ios_base::openmode mode)
364 : basic_iostream<char, char_traits<char> >(0),
365 _M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s) {
366 basic_ios<char, char_traits<char> >::init(&_M_buf);
367 }
369 strstream::~strstream() {}
371 strstreambuf* strstream::rdbuf() const {
372 return __CONST_CAST(strstreambuf*,&_M_buf);
373 }
375 void strstream::freeze(bool freezeflag) {
376 _M_buf.freeze(freezeflag);
377 }
379 int strstream::pcount() const {
380 return _M_buf.pcount();
381 }
383 char* strstream::str() {
384 return _M_buf.str();
385 }
387 _STLP_END_NAMESPACE
389 // Local Variables:
390 // mode:C++
391 // End:
