ReactOS 0.4.15-dev-7906-g1b85a5f
strstream.cpp
Go to the documentation of this file.
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 */
18
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.
24
25#include "stlport_prefix.h"
26
27#include <strstream>
28#include <algorithm>
29#include <limits>
30
32
33// strstreambuf constructor, destructor.
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)));
40
41 char* buf = _M_alloc(n);
42 if (buf) {
43 setp(buf, buf + n);
44 setg(buf, buf, buf);
45 }
46}
47
48strstreambuf::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;
52
53 char* buf = _M_alloc(n);
54 if (buf) {
55 setp(buf, buf + n);
56 setg(buf, buf, buf);
57 }
58}
59
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}
65
66strstreambuf::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) {
70}
71
73 unsigned char* put)
74 : _M_alloc_fun(0), _M_free_fun(0),
75 _M_dynamic(false), _M_frozen(false), _M_constant(false) {
77}
78
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}
84
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}
90
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}
96
98 if (_M_dynamic && !_M_frozen)
99 _M_free(eback());
100}
101
102void strstreambuf::freeze(bool frozenflag) {
103 if (_M_dynamic)
104 _M_frozen = frozenflag;
105}
106
108 freeze(true);
109 return eback();
110}
111
113 return int(pptr() ? pptr() - pbase() : 0);
114}
115
117 if (c == traits_type::eof())
118 return traits_type::not_eof(c);
119
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));
124
125 char* buf = _M_alloc(new_size);
126 if (buf) {
127 memcpy(buf, pbase(), old_size);
128
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 }
136
137 setp(buf, buf + new_size);
138 pbump((int)old_size);
139
140 if (reposition_get)
141 setg(buf, buf + old_get_offset, buf + (max)(old_get_offset, old_size));
142
143 _M_free(old_buffer);
144 }
145 }
146
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}
155
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 }
172
173 return traits_type::eof();
174}
175
177 if (gptr() == egptr() && pptr() && pptr() > egptr())
178 setg(eback(), gptr(), pptr());
179
180 if (gptr() != egptr())
181 return (unsigned char) *gptr();
182 else
183 return _Traits::eof();
184}
185
188 return this;
189}
190
194 bool do_get = false;
195 bool do_put = false;
196
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;
205
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));
210
211 char* seeklow = eback();
212 char* seekhigh = epptr() ? epptr() : egptr();
213
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 }
228
229 off += newoff;
230 if (off < 0 || off > seekhigh - seeklow)
231 return pos_type(off_type(-1));
232
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 }
251
252 return pos_type(newoff);
253}
254
257 return seekoff(pos - pos_type(off_type(0)), ios_base::beg, mode);
258}
259
260
262 if (_M_alloc_fun)
263 return __STATIC_CAST(char*,_M_alloc_fun(n));
264 else
265 return new char[n];
266}
267
269 if (p) {
270 if (_M_free_fun)
271 _M_free_fun(p);
272 else
273 delete[] p;
274 }
275}
276
278 if (get) {
279 size_t N = n > 0 ? size_t(n) : n == 0 ? strlen(get) : size_t(INT_MAX);
280
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}
290
291//----------------------------------------------------------------------
292// Class istrstream
293
295 : basic_istream<char, char_traits<char> >(0), _M_buf(s, 0) {
296 this->init(&_M_buf);
297}
298
300 : basic_istream<char, char_traits<char> >(0), _M_buf(s, 0) {
301 this->init(&_M_buf);
302}
303
305 : basic_istream<char, char_traits<char> >(0), _M_buf(s, n) {
306 this->init(&_M_buf);
307}
308
310 : basic_istream<char, char_traits<char> >(0), _M_buf(s, n) {
311 this->init(&_M_buf);
312}
313
315
318}
319
320char* istrstream::str() { return _M_buf.str(); }
321
322//----------------------------------------------------------------------
323// Class ostrstream
324
326 : basic_ostream<char, char_traits<char> >(0), _M_buf() {
328}
329
332 _M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s) {
334}
335
337
340}
341
342void ostrstream::freeze(bool freezeflag) {
343 _M_buf.freeze(freezeflag);
344}
345
347 return _M_buf.str();
348}
349
351 return _M_buf.pcount();
352}
353
354
355//----------------------------------------------------------------------
356// Class strstream
357
359 : basic_iostream<char, char_traits<char> >(0), _M_buf() {
361}
362
365 _M_buf(s, n, mode & ios_base::app ? s + strlen(s) : s) {
367}
368
370
373}
374
375void strstream::freeze(bool freezeflag) {
376 _M_buf.freeze(freezeflag);
377}
378
379int strstream::pcount() const {
380 return _M_buf.pcount();
381}
382
384 return _M_buf.str();
385}
386
388
389// Local Variables:
390// mode:C++
391// End:
#define N
Definition: crc32.c:57
ACPI_SIZE strlen(const char *String)
Definition: utclib.c:269
unsigned int dir
Definition: maze.c:112
void get(int argc, const char *argv[])
Definition: cmds.c:480
ptrdiff_t streamsize
Definition: char_traits.h:81
Definition: _ios.h:48
void setp(char_type *__pbegin, char_type *__pend)
Definition: _streambuf.h:116
void setg(char_type *__gbegin, char_type *__gnext, char_type *__gend)
Definition: _streambuf.h:92
int openmode
Definition: _ios_base.h:59
int seekdir
Definition: _ios_base.h:60
istrstream(char *)
Definition: strstream.cpp:294
char * str()
Definition: strstream.cpp:320
virtual ~istrstream()
Definition: strstream.cpp:314
strstreambuf * rdbuf() const
Definition: strstream.cpp:316
strstreambuf _M_buf
Definition: _strstream.h:114
char * str()
Definition: strstream.cpp:346
void freeze(bool=true)
Definition: strstream.cpp:342
virtual ~ostrstream()
Definition: strstream.cpp:336
strstreambuf _M_buf
Definition: _strstream.h:133
strstreambuf * rdbuf() const
Definition: strstream.cpp:338
int pcount() const
Definition: strstream.cpp:350
char * str()
Definition: strstream.cpp:383
int pcount() const
Definition: strstream.cpp:379
strstreambuf _M_buf
Definition: _strstream.h:156
virtual ~strstream()
Definition: strstream.cpp:369
strstreambuf * rdbuf() const
Definition: strstream.cpp:371
void freeze(bool=true)
Definition: strstream.cpp:375
virtual _Base * setbuf(char *__buf, streamsize __n)
Definition: strstream.cpp:187
void _M_free(char *)
Definition: strstream.cpp:268
virtual int_type underflow()
Definition: strstream.cpp:176
void freeze(bool=true)
Definition: strstream.cpp:102
int pcount() const
Definition: strstream.cpp:112
virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir, ios_base::openmode __mode=ios_base::in|ios_base::out)
Definition: strstream.cpp:192
virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode=ios_base::in|ios_base::out)
Definition: strstream.cpp:256
__alloc_fn _M_alloc_fun
Definition: _strstream.h:92
bool _M_constant
Definition: _strstream.h:96
bool _M_dynamic
Definition: _strstream.h:94
virtual ~strstreambuf()
Definition: strstream.cpp:97
virtual int_type pbackfail(int_type __c=_Traits::eof())
Definition: strstream.cpp:156
bool _M_frozen
Definition: _strstream.h:95
void _M_setup(char *__get, char *__put, streamsize __n)
Definition: strstream.cpp:277
char * _M_alloc(size_t)
Definition: strstream.cpp:261
char * str()
Definition: strstream.cpp:107
__free_fn _M_free_fun
Definition: _strstream.h:93
virtual int_type overflow(int_type __c=_Traits::eof())
Definition: strstream.cpp:116
strstreambuf(streamsize _Initial_capacity=0)
Definition: strstream.cpp:34
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31
unsigned char
Definition: typeof.h:29
__kernel_size_t size_t
Definition: linux.h:237
__kernel_ptrdiff_t ptrdiff_t
Definition: linux.h:247
#define __REINTERPRET_CAST(__x, __y)
Definition: features.h:586
#define __STATIC_CAST(__x, __y)
Definition: features.h:585
#define __CONST_CAST(__x, __y)
Definition: features.h:584
#define _STLP_BEGIN_NAMESPACE
Definition: features.h:501
#define _STLP_END_NAMESPACE
Definition: features.h:503
GLdouble s
Definition: gl.h:2039
GLdouble n
Definition: glext.h:7729
const GLubyte * c
Definition: glext.h:8905
GLenum mode
Definition: glext.h:6217
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
GLfloat GLfloat p
Definition: glext.h:8902
#define INT_MAX
Definition: limits.h:40
#define c
Definition: ke_i.h:80
#define put(ret, state, sp, n)
Definition: match.c:105
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
#define min(a, b)
Definition: monoChain.cc:55
#define true
Definition: stdbool.h:36
#define false
Definition: stdbool.h:37
#define max(a, b)
Definition: svc.c:63
static int init
Definition: wintirpc.c:33