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1 | // Input streams operating on strings-*- C++ -*- |
2 | ||
a945c346 | 3 | // Copyright (C) 2004-2024 Free Software Foundation, Inc. |
34a2b755 JW |
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 | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
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 | ||
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/>. | |
24 | ||
25 | // | |
26 | // ISO C++ 14882: 27.6.1 Input streams | |
27 | // | |
28 | ||
29 | #ifndef _GLIBCXX_USE_CXX11_ABI | |
30 | // Instantiations in this file use the new SSO std::string ABI unless included | |
31 | // by another file which defines _GLIBCXX_USE_CXX11_ABI=0. | |
32 | # define _GLIBCXX_USE_CXX11_ABI 1 | |
33 | #endif | |
34 | #include <istream> | |
35 | #include <string> | |
36 | ||
37 | namespace std _GLIBCXX_VISIBILITY(default) | |
38 | { | |
39 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
40 | ||
41 | template<> | |
42 | basic_istream<char>& | |
43 | operator>>(basic_istream<char>& __in, basic_string<char>& __str) | |
44 | { | |
45 | typedef basic_istream<char> __istream_type; | |
46 | typedef __istream_type::int_type __int_type; | |
47 | typedef __istream_type::traits_type __traits_type; | |
48 | typedef __istream_type::__streambuf_type __streambuf_type; | |
49 | typedef __istream_type::__ctype_type __ctype_type; | |
50 | typedef basic_string<char> __string_type; | |
51 | typedef __string_type::size_type __size_type; | |
52 | ||
53 | __size_type __extracted = 0; | |
54 | ios_base::iostate __err = ios_base::goodbit; | |
55 | __istream_type::sentry __cerb(__in, false); | |
56 | if (__cerb) | |
57 | { | |
58 | __try | |
59 | { | |
60 | __str.erase(); | |
61 | const streamsize __w = __in.width(); | |
62 | const __size_type __n = __w > 0 ? static_cast<__size_type>(__w) | |
63 | : __str.max_size(); | |
64 | const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc()); | |
65 | const __int_type __eof = __traits_type::eof(); | |
66 | __streambuf_type* __sb = __in.rdbuf(); | |
67 | __int_type __c = __sb->sgetc(); | |
68 | ||
69 | while (__extracted < __n | |
70 | && !__traits_type::eq_int_type(__c, __eof) | |
71 | && !__ct.is(ctype_base::space, | |
72 | __traits_type::to_char_type(__c))) | |
73 | { | |
74 | streamsize __size = std::min(streamsize(__sb->egptr() | |
75 | - __sb->gptr()), | |
76 | streamsize(__n - __extracted)); | |
77 | if (__size > 1) | |
78 | { | |
79 | __size = (__ct.scan_is(ctype_base::space, | |
80 | __sb->gptr() + 1, | |
81 | __sb->gptr() + __size) | |
82 | - __sb->gptr()); | |
83 | __str.append(__sb->gptr(), __size); | |
84 | __sb->__safe_gbump(__size); | |
85 | __extracted += __size; | |
86 | __c = __sb->sgetc(); | |
87 | } | |
88 | else | |
89 | { | |
90 | __str += __traits_type::to_char_type(__c); | |
91 | ++__extracted; | |
92 | __c = __sb->snextc(); | |
93 | } | |
94 | } | |
95 | ||
4e39f563 | 96 | if (__extracted < __n && __traits_type::eq_int_type(__c, __eof)) |
34a2b755 JW |
97 | __err |= ios_base::eofbit; |
98 | __in.width(0); | |
99 | } | |
100 | __catch(__cxxabiv1::__forced_unwind&) | |
101 | { | |
102 | __in._M_setstate(ios_base::badbit); | |
103 | __throw_exception_again; | |
104 | } | |
105 | __catch(...) | |
106 | { | |
107 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
108 | // 91. Description of operator>> and getline() for string<> | |
109 | // might cause endless loop | |
110 | __in._M_setstate(ios_base::badbit); | |
111 | } | |
112 | } | |
113 | if (!__extracted) | |
114 | __err |= ios_base::failbit; | |
115 | if (__err) | |
116 | __in.setstate(__err); | |
117 | return __in; | |
118 | } | |
119 | ||
120 | template<> | |
121 | basic_istream<char>& | |
122 | getline(basic_istream<char>& __in, basic_string<char>& __str, | |
123 | char __delim) | |
124 | { | |
125 | typedef basic_istream<char> __istream_type; | |
126 | typedef __istream_type::int_type __int_type; | |
127 | typedef __istream_type::char_type __char_type; | |
128 | typedef __istream_type::traits_type __traits_type; | |
129 | typedef __istream_type::__streambuf_type __streambuf_type; | |
130 | typedef basic_string<char> __string_type; | |
131 | typedef __string_type::size_type __size_type; | |
132 | ||
133 | __size_type __extracted = 0; | |
134 | const __size_type __n = __str.max_size(); | |
135 | ios_base::iostate __err = ios_base::goodbit; | |
136 | __istream_type::sentry __cerb(__in, true); | |
137 | if (__cerb) | |
138 | { | |
139 | __try | |
140 | { | |
141 | __str.erase(); | |
142 | const __int_type __idelim = __traits_type::to_int_type(__delim); | |
143 | const __int_type __eof = __traits_type::eof(); | |
144 | __streambuf_type* __sb = __in.rdbuf(); | |
145 | __int_type __c = __sb->sgetc(); | |
146 | ||
147 | while (__extracted < __n | |
148 | && !__traits_type::eq_int_type(__c, __eof) | |
149 | && !__traits_type::eq_int_type(__c, __idelim)) | |
150 | { | |
151 | streamsize __size = std::min(streamsize(__sb->egptr() | |
152 | - __sb->gptr()), | |
153 | streamsize(__n - __extracted)); | |
154 | if (__size > 1) | |
155 | { | |
156 | const __char_type* __p = __traits_type::find(__sb->gptr(), | |
157 | __size, | |
158 | __delim); | |
159 | if (__p) | |
160 | __size = __p - __sb->gptr(); | |
161 | __str.append(__sb->gptr(), __size); | |
162 | __sb->__safe_gbump(__size); | |
163 | __extracted += __size; | |
164 | __c = __sb->sgetc(); | |
165 | } | |
166 | else | |
167 | { | |
168 | __str += __traits_type::to_char_type(__c); | |
169 | ++__extracted; | |
170 | __c = __sb->snextc(); | |
171 | } | |
172 | } | |
173 | ||
174 | if (__traits_type::eq_int_type(__c, __eof)) | |
175 | __err |= ios_base::eofbit; | |
176 | else if (__traits_type::eq_int_type(__c, __idelim)) | |
177 | { | |
178 | ++__extracted; | |
179 | __sb->sbumpc(); | |
180 | } | |
181 | else | |
182 | __err |= ios_base::failbit; | |
183 | } | |
184 | __catch(__cxxabiv1::__forced_unwind&) | |
185 | { | |
186 | __in._M_setstate(ios_base::badbit); | |
187 | __throw_exception_again; | |
188 | } | |
189 | __catch(...) | |
190 | { | |
191 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
192 | // 91. Description of operator>> and getline() for string<> | |
193 | // might cause endless loop | |
194 | __in._M_setstate(ios_base::badbit); | |
195 | } | |
196 | } | |
197 | if (!__extracted) | |
198 | __err |= ios_base::failbit; | |
199 | if (__err) | |
200 | __in.setstate(__err); | |
201 | return __in; | |
202 | } | |
203 | ||
204 | #ifdef _GLIBCXX_USE_WCHAR_T | |
205 | template<> | |
206 | basic_istream<wchar_t>& | |
207 | getline(basic_istream<wchar_t>& __in, basic_string<wchar_t>& __str, | |
208 | wchar_t __delim) | |
209 | { | |
210 | typedef basic_istream<wchar_t> __istream_type; | |
211 | typedef __istream_type::int_type __int_type; | |
212 | typedef __istream_type::char_type __char_type; | |
213 | typedef __istream_type::traits_type __traits_type; | |
214 | typedef __istream_type::__streambuf_type __streambuf_type; | |
215 | typedef basic_string<wchar_t> __string_type; | |
216 | typedef __string_type::size_type __size_type; | |
217 | ||
218 | __size_type __extracted = 0; | |
219 | const __size_type __n = __str.max_size(); | |
220 | ios_base::iostate __err = ios_base::goodbit; | |
221 | __istream_type::sentry __cerb(__in, true); | |
222 | if (__cerb) | |
223 | { | |
224 | __try | |
225 | { | |
226 | __str.erase(); | |
227 | const __int_type __idelim = __traits_type::to_int_type(__delim); | |
228 | const __int_type __eof = __traits_type::eof(); | |
229 | __streambuf_type* __sb = __in.rdbuf(); | |
230 | __int_type __c = __sb->sgetc(); | |
231 | ||
232 | while (__extracted < __n | |
233 | && !__traits_type::eq_int_type(__c, __eof) | |
234 | && !__traits_type::eq_int_type(__c, __idelim)) | |
235 | { | |
236 | streamsize __size = std::min(streamsize(__sb->egptr() | |
237 | - __sb->gptr()), | |
238 | streamsize(__n - __extracted)); | |
239 | if (__size > 1) | |
240 | { | |
241 | const __char_type* __p = __traits_type::find(__sb->gptr(), | |
242 | __size, | |
243 | __delim); | |
244 | if (__p) | |
245 | __size = __p - __sb->gptr(); | |
246 | __str.append(__sb->gptr(), __size); | |
247 | __sb->__safe_gbump(__size); | |
248 | __extracted += __size; | |
249 | __c = __sb->sgetc(); | |
250 | } | |
251 | else | |
252 | { | |
253 | __str += __traits_type::to_char_type(__c); | |
254 | ++__extracted; | |
255 | __c = __sb->snextc(); | |
256 | } | |
257 | } | |
258 | ||
259 | if (__traits_type::eq_int_type(__c, __eof)) | |
260 | __err |= ios_base::eofbit; | |
261 | else if (__traits_type::eq_int_type(__c, __idelim)) | |
262 | { | |
263 | ++__extracted; | |
264 | __sb->sbumpc(); | |
265 | } | |
266 | else | |
267 | __err |= ios_base::failbit; | |
268 | } | |
269 | __catch(__cxxabiv1::__forced_unwind&) | |
270 | { | |
271 | __in._M_setstate(ios_base::badbit); | |
272 | __throw_exception_again; | |
273 | } | |
274 | __catch(...) | |
275 | { | |
276 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
277 | // 91. Description of operator>> and getline() for string<> | |
278 | // might cause endless loop | |
279 | __in._M_setstate(ios_base::badbit); | |
280 | } | |
281 | } | |
282 | if (!__extracted) | |
283 | __err |= ios_base::failbit; | |
284 | if (__err) | |
285 | __in.setstate(__err); | |
286 | return __in; | |
287 | } | |
288 | #endif | |
289 | ||
290 | _GLIBCXX_END_NAMESPACE_VERSION | |
291 | } // namespace |