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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/istream
1
/* Copyright (C) 2004 Garrett A. Kajmowicz
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This file is part of the uClibc C++ Library. This library is free
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software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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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
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this library; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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*/
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#include <ios>
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#include <cctype>
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#include <streambuf>
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#include <istream_helpers>
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#include <ostream>
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#ifndef __STD_HEADER_ISTREAM
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#define __STD_HEADER_ISTREAM 1
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#pragma GCC visibility push(default)
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namespace std{
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typedef basic_istream<char> istream;
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#ifdef __UCLIBCXX_HAS_WCHAR__
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typedef basic_istream<wchar_t> wistream;
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#endif
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template <class charT, class traits> basic_istream<charT,traits>& ws(basic_istream<charT,traits>& is);
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template <class charT, class traits> class _UCXXEXPORT basic_istream :
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virtual public basic_ios<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 int_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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typedef basic_streambuf<charT,traits> streambuf_type;
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typedef traits traits_type;
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explicit basic_istream(basic_streambuf<charT,traits>* sb)
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: basic_ios<charT, traits>(sb), count_last_ufmt_input(0)
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{
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basic_ios<charT, traits>::init(sb);
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}
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virtual ~basic_istream() { }
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class sentry;
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basic_istream<charT,traits>& operator>>(basic_istream<charT,traits>& (*pf)(basic_istream<charT,traits>&));
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basic_istream<charT,traits>& operator>>(basic_ios<charT,traits>& (*pf)(basic_ios<charT,traits>&));
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basic_istream<charT,traits>& operator>>(ios_base& (*pf)(ios_base&));
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basic_istream<charT,traits>& operator>>(bool& n);
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basic_istream<charT,traits>& operator>>(short& n);
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basic_istream<charT,traits>& operator>>(unsigned short& n);
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basic_istream<charT,traits>& operator>>(int& n);
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basic_istream<charT,traits>& operator>>(unsigned int& n);
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basic_istream<charT,traits>& operator>>(long& n);
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basic_istream<charT,traits>& operator>>(unsigned long& n);
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basic_istream<charT,traits>& operator>>(void*& p);
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basic_istream<charT,traits>& operator>>(basic_streambuf<char_type,traits>* sb);
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#ifdef __UCLIBCXX_HAS_FLOATS__
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basic_istream<charT,traits>& operator>>(float& f);
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basic_istream<charT,traits>& operator>>(double& f);
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basic_istream<charT,traits>& operator>>(long double& f);
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#endif
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_UCXXEXPORT streamsize gcount() const{
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return count_last_ufmt_input;
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}
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_UCXXEXPORT int_type get(); //below
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_UCXXEXPORT basic_istream<charT,traits>& get(char_type& c); //Below
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_UCXXEXPORT basic_istream<charT,traits>& get(char_type* s, streamsize n){
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return get(s, n, basic_ios<charT,traits>::widen('\n'));
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}
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_UCXXEXPORT basic_istream<charT,traits>& get(char_type* s, streamsize n, char_type delim){
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sentry(*this, true);
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streamsize i = 0;
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int_type c;
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for(i=0;i<n-1;++i){
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c = basic_ios<charT, traits>::mstreambuf->sgetc();
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basic_ios<charT, traits>::mstreambuf->sbumpc();
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if(c == traits::eof() ){
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if(i==0){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
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}else{
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basic_ios<charT,traits>::setstate(ios_base::eofbit);
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}
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break;
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}
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if(c == delim){
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if(i==0){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
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}
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basic_ios<charT, traits>::mstreambuf->sputbackc(c);
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break;
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}
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s[i] = c;
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}
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s[i] = traits::eos();
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count_last_ufmt_input = i;
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return *this;
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}
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_UCXXEXPORT basic_istream<charT,traits>& get(basic_streambuf<char_type,traits>& sb){
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return get(sb, basic_ios<charT,traits>::widen('\n'));
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}
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_UCXXEXPORT basic_istream<charT,traits>& get(basic_streambuf<char_type,traits>& sb, char_type delim){
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sentry(*this, true);
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streamsize i = 0;
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int_type c;
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while(1){ //We will exit internally based upon error conditions
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c = basic_ios<charT, traits>::mstreambuf->sgetc();
131
if(c == traits::eof()){
132
if(i==0){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
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}else{
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basic_ios<charT,traits>::setstate(ios_base::eofbit);
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}
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count_last_ufmt_input = i;
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return *this;
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}
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if(c == delim){
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if(i==0){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
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}
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count_last_ufmt_input = i;
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return *this;
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}
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if(sb.sputc(c) != c){ //Error doing output
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count_last_ufmt_input = i;
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return *this;
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}
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++i;
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basic_ios<charT, traits>::mstreambuf->sbumpc();
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}
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}
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_UCXXEXPORT basic_istream<charT,traits>& getline(char_type* s, streamsize n){
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return getline(s, n, basic_ios<charT,traits>::widen('\n'));
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}
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_UCXXEXPORT basic_istream<charT,traits>& getline(char_type* s, streamsize n, char_type delim){
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sentry(*this, true);
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streamsize i = 0;
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int_type c;
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for(i=0;i<n-1;++i){
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c = basic_ios<charT, traits>::mstreambuf->sgetc();
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if(c == traits::eof() ){
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if( basic_ios<charT,traits>::eof() ){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
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}else{
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basic_ios<charT,traits>::setstate(ios_base::eofbit);
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}
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count_last_ufmt_input = i;
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s[i] = traits::eos();
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return *this;
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}
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if(basic_ios<charT, traits>::mstreambuf->sbumpc()==traits::eof() ){
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basic_ios<charT,traits>::setstate(ios_base::eofbit);
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}
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if(c == delim){
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count_last_ufmt_input = i+1;
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s[i] = traits::eos();
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return *this;
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}
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s[i] = c;
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}
186
s[n-1] = traits::eos();
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return *this;
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}
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_UCXXEXPORT basic_istream<charT,traits>& ignore (streamsize n = 1, int_type delim = traits::eof()){
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sentry(*this, true);
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streamsize i;
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int_type c;
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for(i=0;i<n;++i){
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c = basic_ios<charT, traits>::mstreambuf->sgetc();
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if(c == traits::eof()){
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basic_ios<charT,traits>::setstate(ios_base::eofbit);
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return *this;
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}
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basic_ios<charT, traits>::mstreambuf->sbumpc();
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if(c == delim){
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return *this;
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}
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}
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return *this;
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}
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_UCXXEXPORT int_type peek(){
209
if(basic_ios<charT,traits>::good() == false){
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return traits::eof();
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}else{
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int_type c = basic_ios<charT, traits>::mstreambuf->sgetc();
213
if(c == traits::eof()){
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basic_ios<charT,traits>::setstate(ios_base::eofbit);
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}
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return basic_ios<charT, traits>::mstreambuf->sgetc();
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}
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}
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_UCXXEXPORT basic_istream<charT,traits>& read (char_type* s, streamsize n){
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sentry(*this, true);
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streamsize i;
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int_type c;
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for(i=0;i<n;++i){
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c = basic_ios<charT, traits>::mstreambuf->sgetc();
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227
if(c == traits::eof()){
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basic_ios<charT,traits>::setstate(ios_base::failbit);
229
basic_ios<charT,traits>::setstate(ios_base::eofbit);
230
count_last_ufmt_input = i;
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return *this;
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}
233
basic_ios<charT, traits>::mstreambuf->sbumpc();
234
s[i] = c;
235
}
236
count_last_ufmt_input = n;
237
return *this;
238
}
239
240
_UCXXEXPORT streamsize readsome(char_type* s, streamsize n){
241
sentry(*this, true);
242
if(!basic_ios<charT,traits>::good()){
243
count_last_ufmt_input = 0;
244
basic_ios<charT,traits>::setstate(ios_base::failbit);
245
return 0;
246
}
247
248
if( basic_ios<charT, traits>::mstreambuf->in_avail() == -1){
249
count_last_ufmt_input=0;
250
basic_ios<charT,traits>::setstate(ios_base::eofbit);
251
return 0;
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}
253
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if(n > basic_ios<charT, traits>::mstreambuf->in_avail() ){
255
n = basic_ios<charT, traits>::mstreambuf->in_avail();
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}
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streamsize i;
259
int_type c;
260
261
for(i=0;i<n;++i){
262
c = basic_ios<charT, traits>::mstreambuf->sgetc();
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basic_ios<charT, traits>::mstreambuf->sbumpc();
264
s[i] = c;
265
}
266
count_last_ufmt_input = n;
267
return n;
268
}
269
270
_UCXXEXPORT basic_istream<charT,traits>& putback(char_type c){
271
sentry(*this, true);
272
if(!basic_ios<charT,traits>::good()){
273
basic_ios<charT,traits>::setstate(ios_base::failbit);
274
return *this;
275
}
276
if(basic_ios<charT, traits>::mstreambuf == 0){
277
basic_ios<charT,traits>::setstate(ios_base::badbit);
278
return *this;
279
}
280
if(basic_ios<charT, traits>::mstreambuf->sputbackc(c) == traits::eof()){
281
basic_ios<charT,traits>::setstate(ios_base::badbit);
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return *this;
283
}
284
return *this;
285
}
286
287
_UCXXEXPORT basic_istream<charT,traits>& unget(){
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sentry(*this, true);
289
if(!basic_ios<charT,traits>::good()){
290
basic_ios<charT,traits>::setstate(ios_base::failbit);
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return *this;
292
}
293
if(basic_ios<charT, traits>::mstreambuf == 0){
294
basic_ios<charT,traits>::setstate(ios_base::failbit);
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return *this;
296
}
297
if(basic_ios<charT, traits>::mstreambuf->sungetc() == traits::eof()){
298
basic_ios<charT,traits>::setstate(ios_base::failbit);
299
}
300
return *this;
301
}
302
303
_UCXXEXPORT int sync(){
304
sentry(*this, true);
305
if(basic_ios<charT, traits>::mstreambuf == 0){
306
return -1;
307
}
308
if(basic_ios<charT, traits>::mstreambuf->pubsync() == -1){
309
basic_ios<charT,traits>::setstate(ios_base::badbit);
310
return traits::eof();
311
}
312
return 0;
313
}
314
315
_UCXXEXPORT pos_type tellg(){
316
if(basic_ios<charT,traits>::fail() !=false){
317
return pos_type(-1);
318
}
319
return basic_ios<charT, traits>::mstreambuf->pubseekoff(0, ios_base::cur, ios_base::in);
320
}
321
322
_UCXXEXPORT basic_istream<charT,traits>& seekg(pos_type pos){
323
if(basic_ios<charT,traits>::fail() !=true){
324
basic_ios<charT, traits>::mstreambuf->pubseekpos(pos);
325
}
326
return *this;
327
}
328
329
_UCXXEXPORT basic_istream<charT,traits>& seekg(off_type off, ios_base::seekdir dir){
330
if(basic_ios<charT,traits>::fail() !=true){
331
basic_ios<charT, traits>::mstreambuf->pubseekoff(off, dir);
332
}
333
return *this;
334
}
335
336
protected:
337
_UCXXEXPORT basic_istream(const basic_istream<charT,traits> &): basic_ios<charT, traits>() { }
338
_UCXXEXPORT basic_istream<charT,traits> & operator=(const basic_istream<charT,traits> &){ return *this; }
339
streamsize count_last_ufmt_input;
340
341
};
342
343
template <class charT,class traits = char_traits<charT> > class _UCXXEXPORT basic_istream<charT,traits>::sentry {
344
bool ok;
345
public:
346
explicit _UCXXEXPORT sentry(basic_istream<charT,traits>& os, bool noskipws = false){
347
if(os.good() !=0){ //Prepare for output
348
}
349
350
//Flush any tied buffer
351
if(os.tie() != 0){
352
os.tie()->flush();
353
}
354
if(!noskipws){
355
__skipws(os);
356
}
357
358
ok = true;
359
}
360
_UCXXEXPORT ~sentry() { }
361
_UCXXEXPORT operator bool() {
362
return ok;
363
}
364
};
365
366
//Template implementations of basic_istream functions which may be partially specialized
367
//For code reduction
368
369
template <class charT, class traits>
370
_UCXXEXPORT typename basic_istream<charT,traits>::int_type basic_istream<charT,traits>::get(){
371
sentry(*this, true);
372
int_type retval = basic_ios<charT, traits>::mstreambuf->sgetc();
373
if(retval == traits::eof()){
374
count_last_ufmt_input = 0;
375
basic_ios<charT,traits>::setstate(ios_base::eofbit);
376
}else{
377
count_last_ufmt_input = 1;
378
basic_ios<charT, traits>::mstreambuf->sbumpc();
379
}
380
return retval;
381
}
382
383
template <class charT, class traits>
384
_UCXXEXPORT basic_istream<charT,traits>& basic_istream<charT,traits>::get(char_type& c){
385
sentry(*this, true);
386
int_type retval = basic_ios<charT, traits>::mstreambuf->sgetc();
387
if(retval == traits::eof()){
388
count_last_ufmt_input = 0;
389
basic_ios<charT,traits>::setstate(ios_base::eofbit);
390
basic_ios<charT,traits>::setstate(ios_base::failbit);
391
}else{
392
count_last_ufmt_input = 1;
393
c = traits::to_char_type(retval);
394
basic_ios<charT, traits>::mstreambuf->sbumpc();
395
}
396
return *this;
397
}
398
399
400
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
401
basic_istream<charT,traits>::operator>>(bool& n)
402
{
403
sentry(*this);
404
__istream_readin<traits, charT, bool>::readin(*this, n);
405
return *this;
406
}
407
408
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
409
basic_istream<charT,traits>::operator>>(short& n)
410
{
411
sentry(*this);
412
__istream_readin<traits, charT, short>::readin(*this, n);
413
return *this;
414
}
415
416
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
417
basic_istream<charT,traits>::operator>>(unsigned short& n)
418
{
419
sentry(*this);
420
__istream_readin<traits, charT, unsigned short>::readin(*this, n);
421
return *this;
422
}
423
424
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>& basic_istream<charT,traits>::operator>>(int& n){
425
sentry(*this);
426
__istream_readin<traits, charT, int>::readin(*this, n);
427
return *this;
428
}
429
430
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>& basic_istream<charT,traits>::operator>>(unsigned int& n){
431
sentry(*this);
432
__istream_readin<traits, charT, unsigned int>::readin(*this, n);
433
return *this;
434
}
435
436
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>& basic_istream<charT,traits>::operator>>(long int& n){
437
sentry(*this);
438
__istream_readin<traits, charT, long int>::readin(*this, n);
439
return *this;
440
}
441
442
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
443
basic_istream<charT,traits>::operator>>(unsigned long int& n)
444
{
445
sentry(*this);
446
__istream_readin<traits, charT, unsigned long int>::readin(*this, n);
447
return *this;
448
}
449
450
#ifdef __UCLIBCXX_HAS_FLOATS__
451
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
452
basic_istream<charT,traits>::operator>>(float& n)
453
{
454
sentry(*this);
455
__istream_readin<traits, charT, float>::readin(*this, n);
456
return *this;
457
}
458
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
459
basic_istream<charT,traits>::operator>>(double& n)
460
{
461
sentry(*this);
462
__istream_readin<traits, charT, double>::readin(*this, n);
463
return *this;
464
}
465
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
466
basic_istream<charT,traits>::operator>>(long double& n)
467
{
468
sentry(*this);
469
__istream_readin<traits, charT, long double>::readin(*this, n);
470
return *this;
471
}
472
#endif
473
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
474
basic_istream<charT,traits>::operator>>(void *& n)
475
{
476
sentry(*this);
477
__istream_readin<traits, charT, void*>::readin(*this, n);
478
return *this;
479
}
480
481
template<class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
482
operator>>(basic_istream<charT,traits>& is, charT& c)
483
{
484
typename basic_istream<charT,traits>::sentry s(is);
485
is.get(c);
486
return is;
487
}
488
489
template<class traits> _UCXXEXPORT basic_istream<char,traits>&
490
operator>>(basic_istream<char,traits>& is, unsigned char& c)
491
{
492
typename basic_istream<char,traits>::sentry s(is);
493
char b;
494
is.get(b);
495
c = b;
496
return is;
497
}
498
template<class traits> _UCXXEXPORT basic_istream<char,traits>&
499
operator>>(basic_istream<char,traits>& is, signed char& c)
500
{
501
typename basic_istream<char,traits>::sentry s(is);
502
is.get(c);
503
return is;
504
}
505
506
template<class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
507
operator>>(basic_istream<charT,traits>& is, charT* c)
508
{
509
typename basic_istream<charT,traits>::sentry s(is);
510
int n = is.width();
511
if(n == 0){
512
n = __STRING_MAX_UNITS;
513
}
514
is.get(c, n);
515
return is;
516
517
}
518
template<class traits> _UCXXEXPORT basic_istream<char,traits>&
519
operator>>(basic_istream<char,traits>& is, unsigned char* c)
520
{
521
typename basic_istream<char,traits>::sentry s(is);
522
int n = is.width();
523
if(n == 0){
524
n = __STRING_MAX_UNITS;
525
}
526
is.get(c, n);
527
return is;
528
}
529
template<class traits> _UCXXEXPORT basic_istream<char,traits>&
530
operator>>(basic_istream<char,traits>& is, signed char* c)
531
{
532
typename basic_istream<char,traits>::sentry s(is);
533
int n = is.width();
534
if(n == 0){
535
n = __STRING_MAX_UNITS;
536
}
537
is.get(c, n);
538
return is;
539
}
540
541
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
542
basic_istream<charT,traits>::operator>>(basic_istream<charT,traits>& (*pf)(basic_istream<charT,traits>&))
543
{
544
sentry(*this);
545
pf(*this);
546
return *this;
547
}
548
549
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
550
basic_istream<charT,traits>::operator>>(basic_ios<charT,traits>& (*pf)(basic_ios<charT,traits>&))
551
{
552
sentry(*this);
553
pf(*this);
554
return *this;
555
}
556
557
template <class charT, class traits> _UCXXEXPORT basic_istream<charT,traits>&
558
ws(basic_istream<charT,traits>& is)
559
{
560
__skipws(is);
561
return is;
562
}
563
564
565
#ifdef __UCLIBCXX_EXPAND_ISTREAM_CHAR__
566
#ifndef __UCLIBCXX_COMPILE_ISTREAM__
567
568
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template <> _UCXXEXPORT istream & basic_istream<char, char_traits<char> >::get(char & c);
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template <> _UCXXEXPORT istream::int_type basic_istream<char, char_traits<char> >::get();
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template <> _UCXXEXPORT istream & istream::operator>>(bool &n);
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template <> _UCXXEXPORT istream & istream::operator>>(short &n);
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template <> _UCXXEXPORT istream & istream::operator>>(unsigned short &n);
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template <> _UCXXEXPORT istream & istream::operator>>(int &n);
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template <> _UCXXEXPORT istream & istream::operator>>(unsigned int &n);
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template <> _UCXXEXPORT istream & istream::operator>>(long unsigned &n);
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template <> _UCXXEXPORT istream & istream::operator>>(long int &n);
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template <> _UCXXEXPORT istream & istream::operator>>(void *& p);
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#ifdef __UCLIBCXX_HAS_FLOATS__
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template <> _UCXXEXPORT istream & istream::operator>>(float &f);
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template <> _UCXXEXPORT istream & istream::operator>>(double &f);
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template <> _UCXXEXPORT istream & istream::operator>>(long double &f);
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#endif
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template <> _UCXXEXPORT istream & operator>>(istream & is, char & c);
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template <> _UCXXEXPORT void __skipws(basic_istream<char,char_traits<char> >& is);
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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