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  • Committer: edam
  • Date: 2012-02-25 01:31:43 UTC
  • Revision ID: tim@ed.am-20120225013143-9fet2y2d3fjlrwez
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src/utility/sstream
 
1
/*      Copyright (C) 2004 Garrett A. Kajmowicz
 
2
 
 
3
        This file is part of the uClibc++ Library.
 
4
 
 
5
        This library is free software; you can redistribute it and/or
 
6
        modify it under the terms of the GNU Lesser General Public
 
7
        License as published by the Free Software Foundation; either
 
8
        version 2.1 of the License, or (at your option) any later version.
 
9
 
 
10
        This library is distributed in the hope that it will be useful,
 
11
        but WITHOUT ANY WARRANTY; without even the implied warranty of
 
12
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
13
        Lesser General Public License for more details.
 
14
 
 
15
        You should have received a copy of the GNU Lesser General Public
 
16
        License along with this library; if not, write to the Free Software
 
17
        Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
18
*/
 
19
 
 
20
#include <basic_definitions>
 
21
 
 
22
#ifndef HEADER_STD_SSTREAM
 
23
#define HEADER_STD_SSTREAM 1
 
24
 
 
25
#include <iosfwd>
 
26
#include <ios>
 
27
#include <istream>
 
28
#include <ostream>
 
29
#include <iostream>
 
30
#include <string>
 
31
 
 
32
#pragma GCC visibility push(default)
 
33
 
 
34
namespace std{
 
35
 
 
36
        template <class charT, class traits, class Allocator>
 
37
                class _UCXXEXPORT basic_stringbuf : public basic_streambuf<charT,traits>
 
38
        {
 
39
        public:
 
40
                typedef charT char_type;
 
41
                typedef typename traits::int_type int_type;
 
42
                typedef typename traits::pos_type pos_type;
 
43
                typedef typename traits::off_type off_type;
 
44
                typedef typename Allocator::size_type size_type;
 
45
 
 
46
                explicit _UCXXEXPORT basic_stringbuf(ios_base::openmode which = ios_base::in | ios_base::out)
 
47
                        : data(), ielement(0), oelement(0)
 
48
                {
 
49
                        basic_streambuf<charT,traits>::openedFor = which;
 
50
                }
 
51
 
 
52
                explicit _UCXXEXPORT basic_stringbuf(const basic_string<charT,traits,Allocator>& str,
 
53
                        ios_base::openmode which = ios_base::in | ios_base::out)
 
54
                        : data(str), ielement(0), oelement(0)
 
55
                {
 
56
                        if(which & ios_base::ate){
 
57
                                oelement = data.length();
 
58
                        }
 
59
                        basic_streambuf<charT,traits>::openedFor = which;
 
60
                }
 
61
 
 
62
                virtual _UCXXEXPORT ~basic_stringbuf() { }
 
63
 
 
64
                _UCXXEXPORT basic_string<charT,traits,Allocator> str() const{
 
65
                        return data;
 
66
                }
 
67
 
 
68
                _UCXXEXPORT void str(const basic_string<charT,traits,Allocator>& s){
 
69
                        data = s;
 
70
                        ielement = 0;
 
71
                        if(basic_streambuf<charT,traits>::openedFor & ios_base::ate){
 
72
                                oelement = data.length();
 
73
                        }else{
 
74
                                oelement = 0;
 
75
                        }
 
76
                }
 
77
 
 
78
        protected:
 
79
                virtual _UCXXEXPORT int sync(){
 
80
                        return 0;
 
81
                }
 
82
                virtual _UCXXEXPORT int_type underflow(){
 
83
                        if(ielement >= data.length()){
 
84
                                return traits::eof();
 
85
                        }
 
86
                        return traits::to_int_type(data[ielement]);
 
87
                }
 
88
 
 
89
                virtual _UCXXEXPORT int_type uflow(){
 
90
                        int_type retval = underflow();
 
91
                        if(retval != traits::eof()){
 
92
                                ++ielement;
 
93
                        }
 
94
                        return retval;  
 
95
                }
 
96
 
 
97
                virtual _UCXXEXPORT int_type   pbackfail(int_type c = traits::eof()){
 
98
                        //Error possibilities
 
99
                        if(ielement == 0){
 
100
                                return traits::eof();
 
101
                        }
 
102
                        if(ielement > data.length()){
 
103
                                ielement = data.length();
 
104
                                return traits::eof();
 
105
                        }
 
106
                        //eof passed in
 
107
                        if(traits::eq_int_type(c,traits::eof())==true){
 
108
                                --ielement;
 
109
                                return traits::not_eof(c);
 
110
                        }
 
111
                        if(traits::eq(traits::to_char_type(c),data[ielement-1]) == true){
 
112
                                --ielement;
 
113
                                return c;
 
114
                        }
 
115
                        if(basic_streambuf<charT,traits>::openedFor & ios_base::out){
 
116
                                --ielement;
 
117
                                data[ielement] = c;
 
118
                                return c;
 
119
                        }
 
120
                        return traits::eof();
 
121
                }
 
122
 
 
123
                virtual _UCXXEXPORT int showmanyc(){
 
124
                        return data.length() - ielement;
 
125
                }
 
126
                virtual _UCXXEXPORT streamsize xsgetn(char_type* c, streamsize n){
 
127
                        streamsize i = 0;
 
128
                        while(ielement < data.length() && i < n ){
 
129
                                c[i] = data[ielement];
 
130
                                ++i;
 
131
                                ++ielement;
 
132
                        }
 
133
                        return i;
 
134
                }
 
135
 
 
136
                virtual _UCXXEXPORT int_type overflow (int_type c = traits::eof()){
 
137
                        //Nothing to do
 
138
                        if(traits::eq_int_type(c,traits::eof())){
 
139
                                return traits::not_eof(c);
 
140
                        }
 
141
 
 
142
                        //Actually add character, if possible
 
143
                        if(basic_streambuf<charT,traits>::openedFor & ios_base::out){
 
144
                                if(oelement >= data.length()){
 
145
                                        data.push_back(c);
 
146
                                }else{
 
147
                                        data[oelement] = c;
 
148
                                }
 
149
                                ++oelement;
 
150
                                return c;
 
151
                        }
 
152
                        //Not possible
 
153
                        return traits::eof();
 
154
                }
 
155
 
 
156
                virtual _UCXXEXPORT basic_streambuf<charT,traits>* setbuf(charT*, streamsize){
 
157
                        //This function does nothing
 
158
                        return this;
 
159
                }
 
160
 
 
161
                virtual _UCXXEXPORT streamsize xsputn(const char_type* s, streamsize n){
 
162
                        data.replace(oelement, n, s, n);
 
163
                        oelement += n;
 
164
                        return n;
 
165
                }
 
166
 
 
167
                virtual _UCXXEXPORT pos_type seekoff(off_type off, ios_base::seekdir way,
 
168
                        ios_base::openmode which = ios_base::in | ios_base::out)
 
169
                {
 
170
                        //Test for invalid option
 
171
                        if( (which & ios_base::in) && (which & ios_base::out) && (way == ios_base::cur)){
 
172
                                return -1;
 
173
                        }
 
174
 
 
175
                        //Calculate new location
 
176
                        size_type newpos = 0;
 
177
 
 
178
                        if(way == ios_base::beg){
 
179
                                newpos = off;
 
180
                        }else if(way == ios_base::cur){
 
181
                                if(which & ios_base::out){
 
182
                                        newpos = data.length() + off;
 
183
                                }
 
184
                                if(which & ios_base::in){
 
185
                                        newpos = ielement + off;
 
186
                                }
 
187
                                
 
188
                        }else{
 
189
                                newpos = data.length() + off;
 
190
                        }
 
191
 
 
192
                        //Test for error conditions
 
193
                        if(newpos > data.length()){
 
194
                                return -1;
 
195
                        }
 
196
 
 
197
                        //Shuffle pointers
 
198
 
 
199
                        if(which & ios_base::in){
 
200
                                ielement = newpos;
 
201
                        }
 
202
                        if(which & ios_base::out){
 
203
                                data.resize(newpos);
 
204
                                if(ielement > data.length()){
 
205
                                        ielement = data.length();
 
206
                                }
 
207
                        }
 
208
 
 
209
                        return newpos;
 
210
                }
 
211
                        
 
212
                virtual _UCXXEXPORT pos_type seekpos(pos_type sp, 
 
213
                        ios_base::openmode which = ios_base::in | ios_base::out)
 
214
                {
 
215
                        return seekoff(sp, ios_base::beg, which);
 
216
                }
 
217
 
 
218
                basic_string<charT,traits,Allocator> data;
 
219
                size_type ielement;
 
220
                size_type oelement;
 
221
        };
 
222
 
 
223
 
 
224
        template <class charT, class traits, class Allocator> class _UCXXEXPORT basic_istringstream
 
225
                : public basic_istream<charT,traits>
 
226
        {
 
227
        public:
 
228
                typedef charT char_type;
 
229
                typedef typename traits::int_type int_type;
 
230
                typedef typename traits::pos_type pos_type;
 
231
                typedef typename traits::off_type off_type;
 
232
 
 
233
 
 
234
                explicit _UCXXEXPORT basic_istringstream(ios_base::openmode m = ios_base::in) 
 
235
                        : basic_ios<charT, traits>(&sb), basic_istream<charT,traits>(&sb), sb(m)
 
236
                {
 
237
                }
 
238
                explicit _UCXXEXPORT basic_istringstream( const basic_string<charT,traits,Allocator>& str, 
 
239
                        ios_base::openmode which = ios_base::in) 
 
240
                        : basic_ios<charT, traits>(&sb), basic_istream<charT,traits>(&sb), sb(str, which)
 
241
                {
 
242
                }
 
243
                virtual _UCXXEXPORT ~basic_istringstream() {  }
 
244
                _UCXXEXPORT basic_stringbuf<charT,traits,Allocator>* rdbuf() const{
 
245
                        return &sb;
 
246
                }
 
247
                _UCXXEXPORT basic_string<charT,traits,Allocator> str() const{
 
248
                        return sb.str();
 
249
                }
 
250
                _UCXXEXPORT void str(const basic_string<charT,traits,Allocator>& s){
 
251
                        sb.str(s);
 
252
                        basic_istream<charT,traits>::clear();
 
253
                }
 
254
        private:
 
255
                basic_stringbuf<charT,traits,Allocator> sb;
 
256
        };
 
257
 
 
258
 
 
259
        template <class charT, class traits, class Allocator> class _UCXXEXPORT basic_ostringstream
 
260
                : public basic_ostream<charT,traits>
 
261
        {
 
262
        public:
 
263
 
 
264
                typedef charT char_type;
 
265
                typedef typename traits::int_type int_type;
 
266
                typedef typename traits::pos_type pos_type;
 
267
                typedef typename traits::off_type off_type;
 
268
 
 
269
                explicit _UCXXEXPORT basic_ostringstream(ios_base::openmode m = ios_base::out)
 
270
                        : basic_ios<charT, traits>(&sb), basic_ostream<charT,traits>(&sb), sb(m)
 
271
                {
 
272
                }
 
273
                explicit _UCXXEXPORT basic_ostringstream(const basic_string<charT,traits,Allocator>& str, 
 
274
                        ios_base::openmode which = ios_base::out)
 
275
                        : basic_ios<charT, traits>(&sb), basic_ostream<charT,traits>(&sb), sb(str, which)
 
276
                {
 
277
                }
 
278
                virtual _UCXXEXPORT ~basic_ostringstream() {  }
 
279
 
 
280
                _UCXXEXPORT basic_stringbuf<charT,traits,Allocator>* rdbuf() const{
 
281
                        return &sb;
 
282
                }
 
283
                _UCXXEXPORT basic_string<charT,traits,Allocator> str() const{
 
284
                        return sb.str();
 
285
                }
 
286
                _UCXXEXPORT void str(const basic_string<charT,traits,Allocator>& s){
 
287
                        sb.str(s);
 
288
                        basic_ostream<charT,traits>::clear();
 
289
                }
 
290
        private:
 
291
                basic_stringbuf<charT,traits,Allocator> sb;
 
292
        };
 
293
 
 
294
 
 
295
        template <class charT, class traits, class Allocator> class _UCXXEXPORT basic_stringstream
 
296
                 : public basic_iostream<charT,traits>
 
297
        {
 
298
        public:
 
299
 
 
300
                typedef charT char_type;
 
301
                typedef typename traits::int_type int_type;
 
302
                typedef typename traits::pos_type pos_type;
 
303
                typedef typename traits::off_type off_type;
 
304
 
 
305
                explicit _UCXXEXPORT basic_stringstream(ios_base::openmode which = ios_base::out|ios_base::in)
 
306
                        : basic_ios<charT, traits>(&sb), basic_iostream<charT,traits>(&sb), sb(which)
 
307
                {
 
308
                }
 
309
 
 
310
                explicit _UCXXEXPORT basic_stringstream(const basic_string<charT,traits,Allocator>& str,
 
311
                        ios_base::openmode which = ios_base::out|ios_base::in)
 
312
                        : basic_ios<charT, traits>(&sb), basic_iostream<charT,traits>(&sb), sb(str, which)
 
313
                {
 
314
                }
 
315
                virtual _UCXXEXPORT ~basic_stringstream(){  }
 
316
 
 
317
                _UCXXEXPORT basic_stringbuf<charT,traits,Allocator>* rdbuf(){
 
318
                        return &sb;
 
319
                }
 
320
                _UCXXEXPORT basic_string<charT,traits,Allocator> str() const{
 
321
                        return sb.str();
 
322
                }
 
323
                _UCXXEXPORT void str(const basic_string<charT,traits,Allocator>& s){
 
324
                        sb.str(s);
 
325
                        basic_iostream<charT,traits>::clear();
 
326
                }
 
327
        private:
 
328
                basic_stringbuf<charT, traits> sb;
 
329
        };
 
330
 
 
331
#ifdef __UCLIBCXX_EXPAND_SSTREAM_CHAR__
 
332
#ifndef __UCLIBCXX_COMPILE_SSTREAM__
 
333
 
 
334
#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
 
335
 
 
336
        template <> _UCXXEXPORT basic_stringbuf<char, char_traits<char>, allocator<char> >::
 
337
                basic_stringbuf(ios_base::openmode which);
 
338
        template <> _UCXXEXPORT basic_stringbuf<char, char_traits<char>, allocator<char> >::~basic_stringbuf();
 
339
 
 
340
#endif // __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
 
341
 
 
342
        template <> _UCXXEXPORT basic_string<char, char_traits<char>, allocator<char> >
 
343
                basic_stringbuf<char, char_traits<char>, allocator<char> >::str() const;
 
344
 
 
345
        template <> _UCXXEXPORT basic_stringbuf<char, char_traits<char>, allocator<char> >::int_type
 
346
                basic_stringbuf<char, char_traits<char>, allocator<char> >::
 
347
                        pbackfail(basic_stringbuf<char, char_traits<char>, allocator<char> >::int_type c);
 
348
 
 
349
        template <> _UCXXEXPORT basic_stringbuf<char, char_traits<char>, allocator<char> >::pos_type
 
350
                basic_stringbuf<char, char_traits<char>, allocator<char> >::
 
351
                        seekoff (basic_stringbuf<char, char_traits<char>, allocator<char> >::off_type off,
 
352
                                ios_base::seekdir way,
 
353
                                ios_base::openmode which
 
354
                        );
 
355
 
 
356
        template <> _UCXXEXPORT basic_stringbuf<char, char_traits<char>, allocator<char> >::int_type
 
357
                basic_stringbuf<char, char_traits<char>, allocator<char> >::
 
358
                        overflow (basic_stringbuf<char, char_traits<char>, allocator<char> >::int_type c);
 
359
 
 
360
        template <> _UCXXEXPORT basic_stringbuf<char, char_traits<char>, allocator<char> >::int_type
 
361
                basic_stringbuf<char, char_traits<char>, allocator<char> >::underflow ();
 
362
 
 
363
        template <> _UCXXEXPORT streamsize basic_stringbuf<char, char_traits<char>, allocator<char> >::
 
364
                xsputn(const char* s, streamsize n);
 
365
 
 
366
#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
 
367
 
 
368
        template <> _UCXXEXPORT basic_stringstream<char, char_traits<char>, allocator<char> >::
 
369
                basic_stringstream(ios_base::openmode which);
 
370
        template <> _UCXXEXPORT basic_stringstream<char, char_traits<char>, allocator<char> >::~basic_stringstream();
 
371
        template <> _UCXXEXPORT basic_istringstream<char, char_traits<char>, allocator<char> >::~basic_istringstream();
 
372
        template <> _UCXXEXPORT basic_ostringstream<char, char_traits<char>, allocator<char> >::~basic_ostringstream();
 
373
 
 
374
#endif //__UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
 
375
 
 
376
#endif
 
377
#endif
 
378
 
 
379
#pragma GCC visibility pop
 
380
 
 
381
}
 
382
 
 
383
 
 
384
#endif