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- Committer: edam
- Date: 2012-02-25 01:31:43 UTC
- Revision ID: tim@ed.am-20120225013143-9fet2y2d3fjlrwez
added ulibc
- files added:
- src/utility
added
removed
src/utility/fstream
1
/* Copyright (C) 2004 Garrett A. Kajmowicz
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3
This file is part of the uClibc++ Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
6
License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
11
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
Lesser General Public License for more details.
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14
You should have received a copy of the GNU Lesser General Public
15
License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
*/
18
19
#ifndef __STD_HEADER_FSTREAM
20
#define __STD_HEADER_FSTREAM 1
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22
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#include<basic_definitions>
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25
#include <cstdio>
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#include <cstdlib>
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#include <streambuf>
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#include <istream>
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#include <ostream>
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#include <char_traits>
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32
#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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36
#ifdef __UCLIBCXX_HAS_WCHAR__
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#include <cwchar>
38
#include <cwctype>
39
#endif //__UCLIBCXX_HAS_WCHAR__
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41
#pragma GCC visibility push(default)
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43
namespace std{
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template <class C, class T> class basic_filebuf;
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47
typedef basic_filebuf<char> filebuf;
48
#ifdef __UCLIBCXX_HAS_WCHAR__
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typedef basic_filebuf<wchar_t> wfilebuf;
50
#endif
51
52
53
template <class charT, class traits> class _UCXXEXPORT basic_filebuf
54
: public basic_streambuf<charT,traits>
55
{
56
#ifdef __UCLIBCXX_SUPPORT_CDIR__
57
friend ios_base::Init::Init(); //Needed for cout/cin stuff
58
#endif
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public:
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// Types (inherited from basic_streambuf:
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typedef typename basic_streambuf<charT, traits>::char_type char_type;
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typedef typename basic_streambuf<charT, traits>::int_type int_type;
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typedef typename basic_streambuf<charT, traits>::pos_type pos_type;
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typedef typename basic_streambuf<charT, traits>::off_type off_type;
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typedef traits traits_type;
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67
//Constructors/destructor:
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69
_UCXXEXPORT basic_filebuf() : basic_streambuf<charT, traits>(), fp(0), pbuffer(0), gbuffer(0)
70
{
71
append=false;
72
pbuffer = new char_type[__UCLIBCXX_IOSTREAM_BUFSIZE__];
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gbuffer = new char_type[__UCLIBCXX_IOSTREAM_BUFSIZE__];
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75
setp(pbuffer, pbuffer + __UCLIBCXX_IOSTREAM_BUFSIZE__);
76
//Position get buffer so that there is no data available
77
setg(gbuffer, gbuffer + __UCLIBCXX_IOSTREAM_BUFSIZE__,
78
gbuffer + __UCLIBCXX_IOSTREAM_BUFSIZE__);
79
}
80
81
82
_UCXXEXPORT virtual ~basic_filebuf(){
83
sync();
84
close();
85
delete [] pbuffer;
86
delete [] gbuffer;
87
pbuffer = 0;
88
gbuffer = 0;
89
}
90
91
92
//Members:
93
94
_UCXXEXPORT bool is_open() const{
95
if(fp == 0){
96
return false;
97
}
98
return true;
99
}
100
101
_UCXXEXPORT basic_filebuf<charT,traits>* open(const char* s, ios_base::openmode mode){
102
bool move_end = (mode & ios_base::ate) != 0;
103
if(is_open() !=false){ //Must call close() first
104
return 0;
105
}
106
basic_streambuf<charT,traits>::openedFor = mode;
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mode = mode & ~ios_base::ate;
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109
if(mode == ios_base::out || mode == (ios_base::out | ios_base::trunc)){
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fp = fopen(s, "w" );
111
}else if((mode & ios_base::app) && ! (mode & ios_base::trunc)){
112
if(mode & ios_base::binary){
113
if(mode & ios_base::in){
114
fp = fopen(s, "a+b");
115
}else{
116
fp = fopen(s, "ab");
117
}
118
}else{
119
if(mode & ios_base::in){
120
fp = fopen(s, "a+");
121
}else{
122
fp = fopen(s, "a");
123
}
124
}
125
}else if(mode == ios_base::in){
126
fp = fopen(s, "r");
127
}else if(mode == (ios_base::in | ios_base::out)){
128
fp = fopen(s, "r+");
129
}else if(mode == (ios_base::in | ios_base::out | ios_base::trunc)){
130
fp = fopen(s, "w+");
131
}else if(mode == (ios_base::binary | ios_base::out)){
132
fp = fopen(s, "wb");
133
}else if(mode == (ios_base::in | ios_base::binary)){
134
fp = fopen(s, "rb");
135
}else if(mode == (ios_base::in | ios_base::binary | ios_base::out)){
136
fp = fopen(s, "r+b");
137
}else if(mode==(ios_base::binary | ios_base::out | ios_base::trunc)){
138
fp = fopen(s, "w+b");
139
}else if(mode == (ios_base::in | ios_base::binary | ios_base::out | ios_base::trunc)){
140
fp = fopen(s, "w+b");
141
}
142
143
if(fp == 0){
144
return 0;
145
}
146
if(ferror(fp)){
147
fclose(fp);
148
fp=0;
149
return 0;
150
}
151
int retval = 0;
152
153
//Check to make sure the stream is good
154
if(move_end == true){
155
retval = fseek(fp, 0, SEEK_END);
156
}else{
157
retval = fseek(fp, 0, SEEK_SET);
158
}
159
if(retval!=0){ //Seek error
160
fclose(fp);
161
fp=0;
162
return 0;
163
}
164
165
basic_streambuf<charT,traits>::mgnext = basic_streambuf<charT,traits>::mgend;
166
167
return this;
168
}
169
_UCXXEXPORT basic_filebuf<charT,traits>* close(){
170
if(fp != 0 && fp != stdin && fp != stdout && fp !=stderr ){
171
overflow();
172
sync();
173
int retval = fclose(fp);
174
if(retval !=0){ //Error of some sort
175
return 0;
176
}
177
fp=0;
178
}
179
return this;
180
}
181
protected:
182
_UCXXEXPORT basic_filebuf(const basic_filebuf<charT,traits> &){ }
183
_UCXXEXPORT basic_filebuf<charT,traits> & operator=(const basic_filebuf<charT,traits> &){ return *this; }
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185
//Overridden virtual functions:
186
187
virtual _UCXXEXPORT int showmanyc(){
188
return basic_streambuf<charT,traits>::egptr() - basic_streambuf<charT,traits>::gptr();
189
}
190
virtual _UCXXEXPORT int_type underflow(){
191
/* Some variables used internally:
192
Buffer pointers:
193
charT * mgbeg;
194
charT * mgnext;
195
charT * mgend;
196
197
eback() returns mgbeg
198
gptr() returns mgnext
199
egptr() returns mgend
200
201
gbump(int n) mgnext+=n
202
203
*/
204
205
if(!is_open()){
206
return traits::eof();
207
}
208
209
if(basic_streambuf<charT,traits>::eback() == 0){
210
//No buffer, so...
211
charT c;
212
int retval;
213
retval = fread(&c, sizeof(charT), 1, fp);
214
215
if(retval == 0 || feof(fp) || ferror(fp) ){
216
return traits::eof();
217
}
218
return traits::to_int_type(c);
219
}
220
221
if(basic_streambuf<charT,traits>::eback() == basic_streambuf<charT,traits>::gptr()){ //Buffer is full
222
return traits::to_int_type(*basic_streambuf<charT,traits>::gptr());
223
}
224
//Shift entire buffer back to the begining
225
size_t offset = basic_streambuf<charT,traits>::gptr() - basic_streambuf<charT,traits>::eback();
226
size_t amountData = basic_streambuf<charT,traits>::egptr() - basic_streambuf<charT,traits>::gptr();
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228
for(charT * i = basic_streambuf<charT,traits>::gptr(); i < basic_streambuf<charT,traits>::egptr(); ++i){
229
*(i-offset) = *i;
230
}
231
232
size_t retval = 0;
233
//Save operating flags from file descriptor
234
int fcntl_flags = fcntl(fileno(fp), F_GETFL);
235
retval = 0;
236
237
//Set to non_blocking mode
238
fcntl(fileno(fp), F_SETFL, fcntl_flags | O_NONBLOCK);
239
240
//Fill rest of buffer
241
retval = fread(basic_streambuf<charT,traits>::egptr() -
242
basic_streambuf<charT,traits>::gptr() + basic_streambuf<charT,traits>::eback(),
243
sizeof(charT),
244
offset,
245
fp
246
);
247
248
//Clear problems where we didn't read in enough characters
249
if(EAGAIN == errno){
250
clearerr(fp);
251
}
252
253
//Restore file descriptor clase
254
fcntl(fileno(fp), F_SETFL, fcntl_flags);
255
256
//Now we are going to make sure that we read in at least one character. The hard way.
257
if(retval == 0){
258
fcntl_flags = fcntl(fileno(fp), F_GETFL);
259
//Set to blocking mode
260
fcntl(fileno(fp), F_SETFL, fcntl_flags & ~O_NONBLOCK);
261
262
retval = fread(basic_streambuf<charT,traits>::egptr() -
263
basic_streambuf<charT,traits>::gptr() + basic_streambuf<charT,traits>::eback(),
264
sizeof(charT),
265
1,
266
fp
267
);
268
269
//Restore file descriptor clase
270
fcntl(fileno(fp), F_SETFL, fcntl_flags);
271
272
}
273
274
if(retval !=offset){ //Slide buffer forward again
275
for(size_t i = 0; i < amountData + retval; ++i){
276
*(basic_streambuf<charT,traits>::egptr() - i - 1) =
277
*(basic_streambuf<charT,traits>::eback() + amountData + retval - i - 1);
278
}
279
}
280
281
basic_streambuf<charT,traits>::mgnext -= retval;
282
283
if( (retval <= 0 && feof(fp)) || ferror(fp) ){
284
return traits::eof();
285
}
286
287
return traits::to_int_type(*basic_streambuf<charT,traits>::gptr());
288
}
289
virtual _UCXXEXPORT int_type uflow(){
290
bool dobump = (basic_streambuf<charT,traits>::gptr() != 0);
291
int_type retval = underflow();
292
if(dobump){
293
basic_streambuf<charT,traits>::gbump(1);
294
}
295
return retval;
296
}
297
virtual _UCXXEXPORT int_type pbackfail(int_type c = traits::eof()){
298
if(is_open() == false ||
299
basic_streambuf<charT,traits>::gptr() == basic_streambuf<charT,traits>::eback())
300
{
301
return traits::eof();
302
}
303
if(traits::eq_int_type(c,traits::eof()) == false){
304
if(traits::eq(traits::to_char_type(c), basic_streambuf<charT,traits>::gptr()[-1]) == true){
305
basic_streambuf<charT,traits>::gbump(-1);
306
}else{
307
basic_streambuf<charT,traits>::gbump(-1);
308
basic_streambuf<charT,traits>::gptr()[0] = c;
309
}
310
return c;
311
}else{
312
basic_streambuf<charT,traits>::gbump(-1);
313
return traits::not_eof(c);
314
}
315
}
316
317
virtual _UCXXEXPORT int_type overflow(int_type c = traits::eof()){
318
if(is_open() == false){
319
//Can't do much
320
return traits::eof();
321
}
322
if(basic_streambuf<charT,traits>::pbase() == 0){ //Unbuffered - elliminate dupe code below
323
if(fputc(c, fp) == EOF){
324
return traits::eof();
325
}
326
return c;
327
}
328
if(basic_streambuf<charT,traits>::pbase() == 0 && traits::eq_int_type(c,traits::eof()) ){
329
//Nothing to flush
330
return traits::not_eof(c);
331
}
332
size_t r = basic_streambuf<charT,traits>::pptr() - basic_streambuf<charT,traits>::pbase();
333
334
if( r == 0 && traits::eq_int_type(c,traits::eof()) ){
335
return traits::not_eof(c);
336
}else if (r == 0 ){
337
if(fputc(c, fp) == EOF){
338
return traits::eof();
339
}
340
return c;
341
}
342
343
size_t totalChars = r;
344
345
char_type *buffer = 0;
346
if(traits::eq_int_type(c,traits::eof())){
347
buffer = new char_type[r];
348
}else{
349
buffer = new char_type[r+1];
350
buffer[r] = c;
351
totalChars++;
352
}
353
354
traits::copy(buffer, basic_streambuf<charT,traits>::pbase(), r);
355
// memcpy(buffer, basic_streambuf<charT,traits>::pbase(), r);
356
357
size_t retval = fwrite(buffer, sizeof(charT), totalChars, fp);
358
if(retval !=totalChars){
359
if(retval == 0){
360
delete [] buffer;
361
return traits::eof();
362
}
363
basic_streambuf<charT,traits>::pbump(-retval);
364
fprintf(stderr, "***** Did not write the full buffer out. Should be: %d, actually: %d\n",
365
totalChars, retval);
366
}else{
367
basic_streambuf<charT,traits>::pbump(-r);
368
}
369
370
delete [] buffer;
371
return traits::not_eof(c);
372
}
373
374
virtual _UCXXEXPORT basic_streambuf<charT,traits>* setbuf(char_type* s, streamsize n){
375
if(s == 0 && n == 0){ //Unbuffered
376
if(pbuffer !=0){
377
delete [] pbuffer;
378
}
379
if(gbuffer !=0){
380
delete [] gbuffer;
381
}
382
pbuffer = 0;
383
gbuffer = 0;
384
}else if(basic_streambuf<charT,traits>::gptr() !=0 &&
385
basic_streambuf<charT,traits>::gptr()==basic_streambuf<charT,traits>::egptr())
386
{
387
delete [] pbuffer;
388
pbuffer = s;
389
}
390
return this;
391
}
392
virtual _UCXXEXPORT pos_type seekoff(off_type off, ios_base::seekdir way,
393
ios_base::openmode = ios_base::in | ios_base::out)
394
{
395
if(is_open() == false){
396
return -1;
397
}
398
int whence = SEEK_SET; // if(way == basic_ios<charT>::beg)
399
off_type position = off;
400
401
if(way == basic_ios<charT>::cur){
402
whence = SEEK_CUR;
403
position -= (basic_streambuf<charT,traits>::egptr() - basic_streambuf<charT,traits>::gptr());
404
}else if(way == basic_ios<charT>::end){
405
whence = SEEK_END;
406
}
407
408
sync();
409
410
int retval = fseek(
411
fp,
412
sizeof(charT)*(position),
413
whence
414
);
415
416
//Invalidate read buffer
417
basic_streambuf<charT,traits>::gbump(
418
basic_streambuf<charT,traits>::egptr() - basic_streambuf<charT,traits>::gptr()
419
);
420
421
if(-1 != retval){
422
retval = ftell(fp);
423
}
424
425
return retval;
426
}
427
virtual _UCXXEXPORT pos_type seekpos(pos_type sp, ios_base::openmode = ios_base::in | ios_base::out){
428
if(is_open() == false){
429
return -1;
430
}
431
sync();
432
433
int retval = fseek(fp,sizeof(charT)* sp, SEEK_SET);
434
435
//Invalidate read buffer
436
basic_streambuf<charT,traits>::gbump(basic_streambuf<charT,traits>::egptr() - basic_streambuf<charT,traits>::gptr());
437
if(retval > -1){
438
return sp;
439
}
440
return -1;
441
}
442
virtual _UCXXEXPORT int sync(){
443
if(pbuffer !=0){
444
if(overflow() == traits::eof()){
445
return -1;
446
}
447
}
448
if(0 != fp && 0 != fflush(fp)){
449
return -1;
450
}
451
return 0;
452
}
453
virtual _UCXXEXPORT void imbue(const locale&){
454
return;
455
}
456
457
458
virtual _UCXXEXPORT streamsize xsputn(const char_type* s, streamsize n){
459
if(is_open() == false){
460
return 0;
461
}
462
//Check to see if buffered
463
464
//Check to see if we can buffer the data
465
streamsize buffer_avail = basic_streambuf<charT,traits>::epptr() - basic_streambuf<charT,traits>::pptr();
466
467
if(n > buffer_avail){ //Flush buffer and write directly
468
overflow(); //Flush the buffer
469
return fwrite(s, sizeof(charT), n, fp);
470
}
471
472
//Add to buffer to be written later
473
474
traits::copy(basic_streambuf<charT,traits>::pptr(), s, n);
475
basic_streambuf<charT,traits>::pbump(n);
476
477
return n;
478
}
479
480
FILE * fp;
481
char_type * pbuffer;
482
char_type * gbuffer;
483
bool append;
484
};
485
486
487
#ifdef __UCLIBCXX_HAS_WCHAR__
488
489
template <> _UCXXEXPORT basic_filebuf<wchar_t, char_traits<wchar_t> >::int_type
490
basic_filebuf<wchar_t, char_traits<wchar_t> >::overflow(int_type c);
491
492
template <> _UCXXEXPORT basic_filebuf<wchar_t, char_traits<wchar_t> >::int_type
493
basic_filebuf<wchar_t, char_traits<wchar_t> >::underflow();
494
495
#endif //__UCLIBCXX_HAS_WCHAR__
496
497
498
499
#ifdef __UCLIBCXX_EXPAND_FSTREAM_CHAR__
500
#ifndef __UCLIBCXX_COMPILE_FSTREAM__
501
502
#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
503
504
template <> _UCXXEXPORT filebuf::basic_filebuf();
505
template <> _UCXXEXPORT filebuf::~basic_filebuf();
506
507
#endif // __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
508
509
template <> _UCXXEXPORT filebuf::int_type filebuf::pbackfail(filebuf::int_type c);
510
template <> _UCXXEXPORT filebuf * filebuf::open(const char* s, ios_base::openmode mode);
511
template <> _UCXXEXPORT filebuf * filebuf::close();
512
template <> _UCXXEXPORT filebuf::int_type filebuf::overflow(filebuf::int_type c);
513
template <> _UCXXEXPORT filebuf::int_type filebuf::underflow ();
514
515
template <> _UCXXEXPORT basic_streambuf<char, char_traits<char> > * filebuf::setbuf(char * s, streamsize n);
516
template <> _UCXXEXPORT streamsize filebuf::xsputn(const char* s, streamsize n);
517
518
#endif
519
#endif
520
521
522
template <class charT, class traits> class _UCXXEXPORT basic_ifstream
523
: public basic_istream<charT,traits>
524
{
525
public:
526
typedef charT char_type;
527
typedef typename traits::int_type int_type;
528
typedef typename traits::pos_type pos_type;
529
typedef typename traits::off_type off_type;
530
531
_UCXXEXPORT basic_ifstream(): basic_ios<charT, traits>(&sb), basic_istream<charT,traits>(&sb){
532
//Passing the address of sb
533
}
534
explicit _UCXXEXPORT basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in)
535
: basic_ios<charT, traits>(&sb), basic_istream<charT,traits>(&sb)
536
{
537
if(sb.open(s, mode) == 0){
538
basic_ios<charT,traits>::setstate(ios_base::failbit);
539
}
540
}
541
542
virtual _UCXXEXPORT ~basic_ifstream(){
543
544
}
545
546
_UCXXEXPORT basic_filebuf<charT,traits>* rdbuf() const{
547
return (basic_filebuf<charT,traits>*)&sb;
548
}
549
_UCXXEXPORT bool is_open() const{
550
return sb.is_open();
551
}
552
_UCXXEXPORT void open(const char* s, ios_base::openmode mode = ios_base::in){
553
if(sb.open(s, mode) == 0){
554
basic_ios<charT,traits>::setstate(ios_base::failbit);
555
}
556
}
557
_UCXXEXPORT void close(){
558
sb.close();
559
}
560
private:
561
basic_filebuf<charT,traits> sb;
562
};
563
564
565
template <class charT, class traits> class _UCXXEXPORT basic_ofstream
566
: public basic_ostream<charT,traits>
567
{
568
public:
569
typedef charT char_type;
570
typedef typename traits::int_type int_type;
571
typedef typename traits::pos_type pos_type;
572
typedef typename traits::off_type off_type;
573
574
_UCXXEXPORT basic_ofstream() : basic_ios<charT, traits>(&sb), basic_ostream<charT,traits>(&sb){
575
576
}
577
578
virtual _UCXXEXPORT ~basic_ofstream();
579
580
explicit _UCXXEXPORT basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out | ios_base::trunc) :
581
basic_ios<charT, traits>(&sb), basic_ostream<charT,traits>(&sb)
582
{
583
if(sb.open(s, mode | ios_base::out ) == 0){
584
basic_ios<charT,traits>::setstate(ios_base::failbit);
585
}
586
}
587
588
_UCXXEXPORT basic_filebuf<charT,traits>* rdbuf() const{
589
return (basic_filebuf<charT,traits>*)&sb;
590
}
591
592
_UCXXEXPORT bool is_open() const{
593
return sb.is_open();
594
}
595
_UCXXEXPORT void open(const char* s, ios_base::openmode mode = ios_base::out | ios_base::trunc){
596
if(sb.open(s, mode) == 0){
597
basic_ios<charT,traits>::setstate(ios_base::failbit);
598
}
599
}
600
_UCXXEXPORT void close(){
601
sb.close();
602
}
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private:
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basic_filebuf<charT,traits> sb;
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};
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template <class charT, class traits> _UCXXEXPORT basic_ofstream<charT, traits>::~basic_ofstream(){
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basic_ostream<charT, traits>::flush();
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}
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template <class charT, class traits> class _UCXXEXPORT basic_fstream
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: public basic_iostream<charT,traits>
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{
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public:
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typedef charT char_type;
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typedef typename traits::int_type ins_type;
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typedef typename traits::pos_type pos_type;
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typedef typename traits::off_type off_type;
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_UCXXEXPORT basic_fstream(): basic_ios<charT, traits>(&sb), basic_iostream<charT,traits>(&sb){ }
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explicit _UCXXEXPORT basic_fstream(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out):
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basic_ios<charT, traits>(&sb), basic_iostream<charT,traits>(&sb)
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{
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if(sb.open(s, mode) == 0){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
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}
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}
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_UCXXEXPORT basic_filebuf<charT,traits>* rdbuf() const{
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return (basic_filebuf<charT,traits>*)&sb;
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}
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_UCXXEXPORT bool is_open() const{
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return sb.is_open();
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}
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_UCXXEXPORT void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out){
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if(sb.open(s, mode) == 0){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
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}
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}
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_UCXXEXPORT void close(){
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sb.close();
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}
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private:
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basic_filebuf<charT,traits> sb;
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};
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#if 0
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#ifdef __UCLIBCXX_EXPAND_FSTREAM_CHAR__
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#ifndef __UCLIBCXX_COMPILE_FSTREAM__
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#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
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template <> _UCXXEXPORT basic_ofstream<char, char_traits<char> >::basic_ofstream();
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template <> _UCXXEXPORT basic_ofstream<char, char_traits<char> >::basic_ofstream(const char* s, ios_base::openmode mode);
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template <> _UCXXEXPORT basic_ofstream<char, char_traits<char> >::~basic_ofstream();
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template <> _UCXXEXPORT basic_ifstream<char, char_traits<char> >::basic_ifstream();
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template <> _UCXXEXPORT basic_ifstream<char, char_traits<char> >::basic_ifstream(const char* s, ios_base::openmode mode);
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template <> _UCXXEXPORT basic_ifstream<char, char_traits<char> >::~basic_ifstream();
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#endif // __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
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#endif
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#endif
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#endif
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}
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#pragma GCC visibility pop
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#endif
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Version: 1.18.2, Revision: 480