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adb31ad6 PC |
1 | // Input streams -*- C++ -*- |
2 | ||
aa118a03 | 3 | // Copyright (C) 2004-2014 Free Software Foundation, Inc. |
adb31ad6 PC |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
adb31ad6 PC |
9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
adb31ad6 PC |
24 | |
25 | // | |
26 | // ISO C++ 14882: 27.6.1 Input streams | |
27 | // | |
28 | ||
29 | #include <istream> | |
30 | ||
12ffa228 BK |
31 | namespace std _GLIBCXX_VISIBILITY(default) |
32 | { | |
33 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
3cbc7af0 | 34 | |
adb31ad6 PC |
35 | template<> |
36 | basic_istream<char>& | |
37 | basic_istream<char>:: | |
38 | getline(char_type* __s, streamsize __n, char_type __delim) | |
39 | { | |
40 | _M_gcount = 0; | |
6f0398bb | 41 | ios_base::iostate __err = ios_base::goodbit; |
adb31ad6 | 42 | sentry __cerb(*this, true); |
880b527f | 43 | if (__cerb) |
adb31ad6 | 44 | { |
bc2631e0 | 45 | __try |
adb31ad6 PC |
46 | { |
47 | const int_type __idelim = traits_type::to_int_type(__delim); | |
48 | const int_type __eof = traits_type::eof(); | |
49 | __streambuf_type* __sb = this->rdbuf(); | |
50 | int_type __c = __sb->sgetc(); | |
51 | ||
52 | while (_M_gcount + 1 < __n | |
53 | && !traits_type::eq_int_type(__c, __eof) | |
54 | && !traits_type::eq_int_type(__c, __idelim)) | |
55 | { | |
56 | streamsize __size = std::min(streamsize(__sb->egptr() | |
57 | - __sb->gptr()), | |
58 | streamsize(__n - _M_gcount | |
59 | - 1)); | |
60 | if (__size > 1) | |
61 | { | |
62 | const char_type* __p = traits_type::find(__sb->gptr(), | |
63 | __size, | |
64 | __delim); | |
65 | if (__p) | |
66 | __size = __p - __sb->gptr(); | |
67 | traits_type::copy(__s, __sb->gptr(), __size); | |
68 | __s += __size; | |
1139a735 | 69 | __sb->__safe_gbump(__size); |
adb31ad6 PC |
70 | _M_gcount += __size; |
71 | __c = __sb->sgetc(); | |
72 | } | |
73 | else | |
74 | { | |
75 | *__s++ = traits_type::to_char_type(__c); | |
76 | ++_M_gcount; | |
77 | __c = __sb->snextc(); | |
78 | } | |
79 | } | |
80 | ||
81 | if (traits_type::eq_int_type(__c, __eof)) | |
82 | __err |= ios_base::eofbit; | |
83 | else if (traits_type::eq_int_type(__c, __idelim)) | |
84 | { | |
85 | ++_M_gcount; | |
86 | __sb->sbumpc(); | |
87 | } | |
88 | else | |
89 | __err |= ios_base::failbit; | |
90 | } | |
bc2631e0 | 91 | __catch(__cxxabiv1::__forced_unwind&) |
d05f74f1 JM |
92 | { |
93 | this->_M_setstate(ios_base::badbit); | |
94 | __throw_exception_again; | |
95 | } | |
bc2631e0 | 96 | __catch(...) |
adb31ad6 PC |
97 | { this->_M_setstate(ios_base::badbit); } |
98 | } | |
75a25e3f PC |
99 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
100 | // 243. get and getline when sentry reports failure. | |
101 | if (__n > 0) | |
102 | *__s = char_type(); | |
adb31ad6 PC |
103 | if (!_M_gcount) |
104 | __err |= ios_base::failbit; | |
105 | if (__err) | |
106 | this->setstate(__err); | |
107 | return *this; | |
108 | } | |
109 | ||
adb31ad6 PC |
110 | template<> |
111 | basic_istream<char>& | |
112 | basic_istream<char>:: | |
113 | ignore(streamsize __n, int_type __delim) | |
114 | { | |
115 | if (traits_type::eq_int_type(__delim, traits_type::eof())) | |
116 | return ignore(__n); | |
117 | ||
118 | _M_gcount = 0; | |
119 | sentry __cerb(*this, true); | |
880b527f | 120 | if (__n > 0 && __cerb) |
adb31ad6 | 121 | { |
6f0398bb | 122 | ios_base::iostate __err = ios_base::goodbit; |
bc2631e0 | 123 | __try |
adb31ad6 | 124 | { |
21da6d0f | 125 | const char_type __cdelim = traits_type::to_char_type(__delim); |
adb31ad6 PC |
126 | const int_type __eof = traits_type::eof(); |
127 | __streambuf_type* __sb = this->rdbuf(); | |
128 | int_type __c = __sb->sgetc(); | |
129 | ||
78593d78 | 130 | bool __large_ignore = false; |
bea53dbf | 131 | while (true) |
adb31ad6 | 132 | { |
bea53dbf PC |
133 | while (_M_gcount < __n |
134 | && !traits_type::eq_int_type(__c, __eof) | |
135 | && !traits_type::eq_int_type(__c, __delim)) | |
adb31ad6 | 136 | { |
bea53dbf PC |
137 | streamsize __size = std::min(streamsize(__sb->egptr() |
138 | - __sb->gptr()), | |
139 | streamsize(__n - _M_gcount)); | |
140 | if (__size > 1) | |
141 | { | |
142 | const char_type* __p = traits_type::find(__sb->gptr(), | |
143 | __size, | |
144 | __cdelim); | |
145 | if (__p) | |
146 | __size = __p - __sb->gptr(); | |
1139a735 | 147 | __sb->__safe_gbump(__size); |
bea53dbf PC |
148 | _M_gcount += __size; |
149 | __c = __sb->sgetc(); | |
150 | } | |
151 | else | |
152 | { | |
153 | ++_M_gcount; | |
154 | __c = __sb->snextc(); | |
155 | } | |
adb31ad6 | 156 | } |
6725add5 | 157 | if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max |
bea53dbf PC |
158 | && !traits_type::eq_int_type(__c, __eof) |
159 | && !traits_type::eq_int_type(__c, __delim)) | |
78593d78 | 160 | { |
6725add5 PC |
161 | _M_gcount = |
162 | __gnu_cxx::__numeric_traits<streamsize>::__min; | |
78593d78 PC |
163 | __large_ignore = true; |
164 | } | |
adb31ad6 | 165 | else |
bea53dbf | 166 | break; |
adb31ad6 | 167 | } |
bea53dbf | 168 | |
78593d78 | 169 | if (__large_ignore) |
6725add5 | 170 | _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max; |
78593d78 | 171 | |
a141a5af | 172 | if (traits_type::eq_int_type(__c, __eof)) |
adb31ad6 | 173 | __err |= ios_base::eofbit; |
a141a5af | 174 | else if (traits_type::eq_int_type(__c, __delim)) |
adb31ad6 | 175 | { |
6725add5 PC |
176 | if (_M_gcount |
177 | < __gnu_cxx::__numeric_traits<streamsize>::__max) | |
78593d78 | 178 | ++_M_gcount; |
adb31ad6 PC |
179 | __sb->sbumpc(); |
180 | } | |
181 | } | |
bc2631e0 | 182 | __catch(__cxxabiv1::__forced_unwind&) |
d05f74f1 JM |
183 | { |
184 | this->_M_setstate(ios_base::badbit); | |
185 | __throw_exception_again; | |
186 | } | |
bc2631e0 | 187 | __catch(...) |
adb31ad6 PC |
188 | { this->_M_setstate(ios_base::badbit); } |
189 | if (__err) | |
190 | this->setstate(__err); | |
191 | } | |
192 | return *this; | |
193 | } | |
194 | ||
ceed88b1 PC |
195 | template<> |
196 | basic_istream<char>& | |
197 | operator>>(basic_istream<char>& __in, char* __s) | |
198 | { | |
199 | typedef basic_istream<char> __istream_type; | |
200 | typedef __istream_type::int_type __int_type; | |
201 | typedef __istream_type::char_type __char_type; | |
202 | typedef __istream_type::traits_type __traits_type; | |
203 | typedef __istream_type::__streambuf_type __streambuf_type; | |
204 | typedef __istream_type::__ctype_type __ctype_type; | |
205 | ||
206 | streamsize __extracted = 0; | |
6f0398bb | 207 | ios_base::iostate __err = ios_base::goodbit; |
ceed88b1 | 208 | __istream_type::sentry __cerb(__in, false); |
880b527f | 209 | if (__cerb) |
ceed88b1 | 210 | { |
bc2631e0 | 211 | __try |
ceed88b1 PC |
212 | { |
213 | // Figure out how many characters to extract. | |
214 | streamsize __num = __in.width(); | |
215 | if (__num <= 0) | |
6725add5 | 216 | __num = __gnu_cxx::__numeric_traits<streamsize>::__max; |
ceed88b1 PC |
217 | |
218 | const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc()); | |
219 | ||
220 | const __int_type __eof = __traits_type::eof(); | |
221 | __streambuf_type* __sb = __in.rdbuf(); | |
222 | __int_type __c = __sb->sgetc(); | |
223 | ||
224 | while (__extracted < __num - 1 | |
225 | && !__traits_type::eq_int_type(__c, __eof) | |
226 | && !__ct.is(ctype_base::space, | |
227 | __traits_type::to_char_type(__c))) | |
228 | { | |
229 | streamsize __size = std::min(streamsize(__sb->egptr() | |
230 | - __sb->gptr()), | |
231 | streamsize(__num - __extracted | |
232 | - 1)); | |
233 | if (__size > 1) | |
234 | { | |
235 | __size = (__ct.scan_is(ctype_base::space, | |
236 | __sb->gptr() + 1, | |
237 | __sb->gptr() + __size) | |
238 | - __sb->gptr()); | |
239 | __traits_type::copy(__s, __sb->gptr(), __size); | |
240 | __s += __size; | |
1139a735 | 241 | __sb->__safe_gbump(__size); |
ceed88b1 PC |
242 | __extracted += __size; |
243 | __c = __sb->sgetc(); | |
244 | } | |
245 | else | |
246 | { | |
247 | *__s++ = __traits_type::to_char_type(__c); | |
248 | ++__extracted; | |
249 | __c = __sb->snextc(); | |
250 | } | |
251 | } | |
252 | ||
253 | if (__traits_type::eq_int_type(__c, __eof)) | |
254 | __err |= ios_base::eofbit; | |
255 | ||
256 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
257 | // 68. Extractors for char* should store null at end | |
258 | *__s = __char_type(); | |
259 | __in.width(0); | |
260 | } | |
bc2631e0 | 261 | __catch(__cxxabiv1::__forced_unwind&) |
d05f74f1 JM |
262 | { |
263 | __in._M_setstate(ios_base::badbit); | |
264 | __throw_exception_again; | |
265 | } | |
bc2631e0 | 266 | __catch(...) |
ceed88b1 PC |
267 | { __in._M_setstate(ios_base::badbit); } |
268 | } | |
269 | if (!__extracted) | |
270 | __err |= ios_base::failbit; | |
271 | if (__err) | |
272 | __in.setstate(__err); | |
273 | return __in; | |
274 | } | |
275 | ||
adb31ad6 PC |
276 | #ifdef _GLIBCXX_USE_WCHAR_T |
277 | template<> | |
278 | basic_istream<wchar_t>& | |
279 | basic_istream<wchar_t>:: | |
280 | getline(char_type* __s, streamsize __n, char_type __delim) | |
281 | { | |
282 | _M_gcount = 0; | |
6f0398bb | 283 | ios_base::iostate __err = ios_base::goodbit; |
adb31ad6 | 284 | sentry __cerb(*this, true); |
880b527f | 285 | if (__cerb) |
adb31ad6 | 286 | { |
bc2631e0 | 287 | __try |
adb31ad6 PC |
288 | { |
289 | const int_type __idelim = traits_type::to_int_type(__delim); | |
290 | const int_type __eof = traits_type::eof(); | |
291 | __streambuf_type* __sb = this->rdbuf(); | |
292 | int_type __c = __sb->sgetc(); | |
293 | ||
294 | while (_M_gcount + 1 < __n | |
295 | && !traits_type::eq_int_type(__c, __eof) | |
296 | && !traits_type::eq_int_type(__c, __idelim)) | |
297 | { | |
298 | streamsize __size = std::min(streamsize(__sb->egptr() | |
299 | - __sb->gptr()), | |
300 | streamsize(__n - _M_gcount | |
301 | - 1)); | |
302 | if (__size > 1) | |
303 | { | |
304 | const char_type* __p = traits_type::find(__sb->gptr(), | |
305 | __size, | |
306 | __delim); | |
307 | if (__p) | |
308 | __size = __p - __sb->gptr(); | |
309 | traits_type::copy(__s, __sb->gptr(), __size); | |
310 | __s += __size; | |
1139a735 | 311 | __sb->__safe_gbump(__size); |
adb31ad6 PC |
312 | _M_gcount += __size; |
313 | __c = __sb->sgetc(); | |
314 | } | |
315 | else | |
316 | { | |
317 | *__s++ = traits_type::to_char_type(__c); | |
318 | ++_M_gcount; | |
319 | __c = __sb->snextc(); | |
320 | } | |
321 | } | |
322 | ||
323 | if (traits_type::eq_int_type(__c, __eof)) | |
324 | __err |= ios_base::eofbit; | |
325 | else if (traits_type::eq_int_type(__c, __idelim)) | |
326 | { | |
327 | ++_M_gcount; | |
328 | __sb->sbumpc(); | |
329 | } | |
330 | else | |
331 | __err |= ios_base::failbit; | |
332 | } | |
bc2631e0 | 333 | __catch(__cxxabiv1::__forced_unwind&) |
d05f74f1 JM |
334 | { |
335 | this->_M_setstate(ios_base::badbit); | |
336 | __throw_exception_again; | |
337 | } | |
bc2631e0 | 338 | __catch(...) |
adb31ad6 PC |
339 | { this->_M_setstate(ios_base::badbit); } |
340 | } | |
75a25e3f PC |
341 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
342 | // 243. get and getline when sentry reports failure. | |
343 | if (__n > 0) | |
344 | *__s = char_type(); | |
adb31ad6 PC |
345 | if (!_M_gcount) |
346 | __err |= ios_base::failbit; | |
347 | if (__err) | |
348 | this->setstate(__err); | |
349 | return *this; | |
350 | } | |
351 | ||
adb31ad6 PC |
352 | template<> |
353 | basic_istream<wchar_t>& | |
354 | basic_istream<wchar_t>:: | |
355 | ignore(streamsize __n, int_type __delim) | |
356 | { | |
357 | if (traits_type::eq_int_type(__delim, traits_type::eof())) | |
358 | return ignore(__n); | |
359 | ||
360 | _M_gcount = 0; | |
361 | sentry __cerb(*this, true); | |
880b527f | 362 | if (__n > 0 && __cerb) |
adb31ad6 | 363 | { |
6f0398bb | 364 | ios_base::iostate __err = ios_base::goodbit; |
bc2631e0 | 365 | __try |
adb31ad6 | 366 | { |
880b527f | 367 | const char_type __cdelim = traits_type::to_char_type(__delim); |
adb31ad6 PC |
368 | const int_type __eof = traits_type::eof(); |
369 | __streambuf_type* __sb = this->rdbuf(); | |
370 | int_type __c = __sb->sgetc(); | |
371 | ||
78593d78 | 372 | bool __large_ignore = false; |
bea53dbf | 373 | while (true) |
adb31ad6 | 374 | { |
bea53dbf PC |
375 | while (_M_gcount < __n |
376 | && !traits_type::eq_int_type(__c, __eof) | |
377 | && !traits_type::eq_int_type(__c, __delim)) | |
adb31ad6 | 378 | { |
bea53dbf PC |
379 | streamsize __size = std::min(streamsize(__sb->egptr() |
380 | - __sb->gptr()), | |
381 | streamsize(__n - _M_gcount)); | |
382 | if (__size > 1) | |
383 | { | |
384 | const char_type* __p = traits_type::find(__sb->gptr(), | |
385 | __size, | |
386 | __cdelim); | |
387 | if (__p) | |
388 | __size = __p - __sb->gptr(); | |
1139a735 | 389 | __sb->__safe_gbump(__size); |
bea53dbf PC |
390 | _M_gcount += __size; |
391 | __c = __sb->sgetc(); | |
392 | } | |
393 | else | |
394 | { | |
395 | ++_M_gcount; | |
396 | __c = __sb->snextc(); | |
397 | } | |
adb31ad6 | 398 | } |
6725add5 | 399 | if (__n == __gnu_cxx::__numeric_traits<streamsize>::__max |
bea53dbf PC |
400 | && !traits_type::eq_int_type(__c, __eof) |
401 | && !traits_type::eq_int_type(__c, __delim)) | |
78593d78 | 402 | { |
6725add5 PC |
403 | _M_gcount = |
404 | __gnu_cxx::__numeric_traits<streamsize>::__min; | |
78593d78 PC |
405 | __large_ignore = true; |
406 | } | |
adb31ad6 | 407 | else |
bea53dbf | 408 | break; |
adb31ad6 | 409 | } |
bea53dbf | 410 | |
78593d78 | 411 | if (__large_ignore) |
6725add5 | 412 | _M_gcount = __gnu_cxx::__numeric_traits<streamsize>::__max; |
78593d78 | 413 | |
a141a5af | 414 | if (traits_type::eq_int_type(__c, __eof)) |
adb31ad6 | 415 | __err |= ios_base::eofbit; |
a141a5af | 416 | else if (traits_type::eq_int_type(__c, __delim)) |
adb31ad6 | 417 | { |
6725add5 PC |
418 | if (_M_gcount |
419 | < __gnu_cxx::__numeric_traits<streamsize>::__max) | |
78593d78 | 420 | ++_M_gcount; |
adb31ad6 PC |
421 | __sb->sbumpc(); |
422 | } | |
423 | } | |
bc2631e0 | 424 | __catch(__cxxabiv1::__forced_unwind&) |
d05f74f1 JM |
425 | { |
426 | this->_M_setstate(ios_base::badbit); | |
427 | __throw_exception_again; | |
428 | } | |
bc2631e0 | 429 | __catch(...) |
adb31ad6 PC |
430 | { this->_M_setstate(ios_base::badbit); } |
431 | if (__err) | |
432 | this->setstate(__err); | |
433 | } | |
434 | return *this; | |
435 | } | |
436 | #endif | |
3cbc7af0 | 437 | |
34a2b755 | 438 | |
12ffa228 BK |
439 | _GLIBCXX_END_NAMESPACE_VERSION |
440 | } // namespace |