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Root/tags/2.0/i386/modules/uClibcxx/fstream.cpp

Source at commit 1808 created 12 years 4 months ago.
By blackosx, Revise layout of package installer 'Welcome' file so it looks cleaner. Change the copyright notice to begin from 2009 as seen in the Chameleon 2.0 r431 installer. Should this date be set earlier?
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#define __UCLIBCXX_COMPILE_FSTREAM__ 1␊
21␊
22#include <fstream>␊
23␊
24namespace std{␊
25␊
26#ifdef __UCLIBCXX_EXPAND_FSTREAM_CHAR__␊
27␊
28#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__␊
29␊
30␉template _UCXXEXPORT filebuf::basic_filebuf();␊
31␉template _UCXXEXPORT filebuf::~basic_filebuf();␊
32␊
33#endif //__UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__␊
34␊
35␉template _UCXXEXPORT filebuf::int_type filebuf::pbackfail(filebuf::int_type c);␊
36␉template _UCXXEXPORT filebuf * filebuf::open(const char* s, ios_base::openmode mode);␊
37␉template _UCXXEXPORT filebuf * filebuf::close();␊
38␉template _UCXXEXPORT filebuf::int_type filebuf::overflow(filebuf::int_type);␊
39␉template _UCXXEXPORT filebuf::int_type filebuf::underflow ();␊
40␉template _UCXXEXPORT streamsize filebuf::xsputn(const char* s, streamsize n);␊
41␊
42␉template _UCXXEXPORT basic_streambuf<char, char_traits<char> >*␊
43␉␉filebuf::setbuf(char * s, streamsize n);␊
44␊
45␊
46#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__␊
47␊
48␉template _UCXXEXPORT basic_ofstream<char, char_traits<char> >::basic_ofstream();␊
49␉template _UCXXEXPORT basic_ofstream<char, char_traits<char> >::basic_ofstream(const char* s, ios_base::openmode mode);␊
50␉template _UCXXEXPORT basic_ofstream<char, char_traits<char> >::~basic_ofstream();␊
51␊
52␉template _UCXXEXPORT basic_ifstream<char, char_traits<char> >::basic_ifstream();␊
53␉template _UCXXEXPORT basic_ifstream<char, char_traits<char> >::basic_ifstream(const char* s, ios_base::openmode mode);␊
54␉template _UCXXEXPORT basic_ifstream<char, char_traits<char> >::~basic_ifstream();␊
55␊
56#endif //__UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__␊
57␊
58␊
59#endif␊
60␊
61␊
62␊
63#ifdef __UCLIBCXX_HAS_WCHAR__␊
64␊
65template <> _UCXXEXPORT basic_filebuf<wchar_t, char_traits<wchar_t> >::int_type␊
66␉basic_filebuf<wchar_t, char_traits<wchar_t> >::overflow(int_type c)␊
67{␊
68␉typedef basic_streambuf<wchar_t, char_traits<wchar_t> > wstreambuf;␊
69␉typedef char_traits<wchar_t> wtraits;␊
70␊
71␉if(is_open() == false){␊
72␉␉//Can't do much␊
73␉␉return wtraits::eof();␊
74␉}␊
75␊
76␉mbstate_t ps = { 0 };␊
77␉char out_array[8];␊
78␉size_t out_size;␊
79␊
80␊
81␉if( wstreambuf::pbase() != 0 ){␊
82␊
83␉␉//Write all possible character from the existing array first␊
84␉␉size_t chars_written = 0;␊
85␉␉while(wstreambuf::pbase() && (wstreambuf::pbase() + chars_written !=wstreambuf::pptr()) ){␊
86␉␉␉out_size = wcrtomb(out_array, wstreambuf::pbase()[chars_written], &ps);␊
87␉␉␉if(out_size == (size_t)(-1) || fwrite(out_array, out_size, 1, fp) == 0){␊
88␉␉␉␉break;␊
89␉␉␉}␊
90␉␉␉++chars_written;␊
91␉␉}␊
92␊
93␉␉if( wstreambuf::pbase() + chars_written == wstreambuf::pptr() ){␊
94␉␉␉wstreambuf::pbump(-chars_written);␊
95␉␉}else{␊
96␉␉␉//Shuffle data back into order␊
97␉␉␉size_t chars_left = wstreambuf::pptr() - wstreambuf::pbase() - chars_written;␊
98␉␉␉for(size_t i = 0; i < chars_left; ++i){␊
99␉␉␉␉wstreambuf::pbase()[i] = (wstreambuf::pptr() - chars_written)[i];␊
100␉␉␉}␊
101␉␉␉return wtraits::eof();␊
102␉␉}␊
103␉}␊
104␊
105␉if( !wtraits::eq_int_type(c, wtraits::eof()) ){␊
106␉␉out_size = wcrtomb(out_array, c, &ps);␊
107␉␉if(out_size == (size_t)(-1) || fwrite(out_array, out_size, 1, fp) == 0){␊
108␉␉␉return wtraits::eof();␊
109␉␉}␊
110␉␉return c;␊
111␉}␊
112␊
113␉return wtraits::not_eof(c);␊
114}␊
115␊
116␊
117template <> _UCXXEXPORT basic_filebuf<wchar_t, char_traits<wchar_t> >::int_type␊
118 basic_filebuf<wchar_t, char_traits<wchar_t> >::underflow()␊
119{␊
120␉/*Some variables used internally:␊
121␉Buffer pointers:␊
122␊
123␉charT * mgbeg;␊
124␉charT * mgnext;␊
125␉charT * mgend;␊
126␊
127␉eback() returns mgbeg␊
128␉gptr() returns mgnext␊
129␉egptr() returns mgend␊
130␊
131␉gbump(int n) mgnext+=n␊
132␉*/␊
133␊
134␉typedef char_traits<wchar_t> traits;␊
135␉typedef basic_streambuf<wchar_t, traits> wstreambuf;␊
136␊
137␊
138␉if(wstreambuf::eback() == wstreambuf::gptr() && 0 != wstreambuf::eback()){␉//Buffer is full␊
139␉␉return traits::to_int_type(*wstreambuf::gptr());␊
140␉}␊
141␊
142 size_t in_size;␊
143␊
144␉wchar_t c = 0;␊
145␉wint_t wi = 0;␊
146␉in_size = 0;␊
147␊
148␉wi = fgetwc(fp);␊
149␉if(WEOF == wi){␊
150␉␉fprintf(stderr, "WEOF returned by fgetwc\n");␊
151␉␉return traits::eof();␊
152␉}␊
153␊
154␉c = traits::to_char_type(wi);␊
155␊
156␉if(wstreambuf::eback() == 0){␊
157␉␉return traits::to_int_type(c);␊
158␉}␊
159␊
160␉for(wchar_t * i = wstreambuf::gptr(); i < wstreambuf::egptr(); ++i){␊
161␉␉*(i-1) = *i;␊
162␉}␊
163␊
164␉*(wstreambuf::egptr()-1) = c;␊
165␉␊
166␉wstreambuf::mgnext -= 1;␊
167␊
168␉return traits::to_int_type(*wstreambuf::gptr());␊
169}␊
170␊
171#endif // __UCLIBCXX_HAS_WCHAR__␊
172␊
173␊
174}␊
175

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