330 lines
7.8 KiB
Plaintext
330 lines
7.8 KiB
Plaintext
/* Copyright (C) 2004 Garrett A. Kajmowicz
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This file is part of the uClibc++ Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <basic_definitions>
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#include <locale>
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#include <string>
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#include <iosfwd>
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#ifndef HEADER_STD_STREAMBUF
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#define HEADER_STD_STREAMBUF 1
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#include <ios>
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#pragma GCC visibility push(default)
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namespace std{
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template <class charT, class traits> class _UCXXEXPORT basic_streambuf{
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public:
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#ifdef __UCLIBCXX_SUPPORT_CDIR__
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friend ios_base::Init::Init();
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#endif
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// Types:
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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 traits traits_type;
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virtual ~basic_streambuf();
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locale pubimbue(const locale &loc);
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locale getloc() const{
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return myLocale;
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}
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basic_streambuf<char_type,traits>* pubsetbuf(char_type* s, streamsize n){
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return setbuf(s,n);
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}
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pos_type pubseekoff(off_type off,
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typename ios_base::seekdir way,
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ios_base::openmode which = ios_base::in |
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ios_base::out
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)
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{
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return seekoff(off,way,which);
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}
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pos_type pubseekpos(pos_type sp, ios_base::openmode which = ios_base::in | ios_base::out){
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return seekpos(sp,which);
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}
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int pubsync(){
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return sync();
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}
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streamsize in_avail();
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int_type snextc();
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int_type sbumpc();
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int_type sgetc();
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streamsize sgetn(char_type* s, streamsize n){
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return xsgetn(s,n);
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}
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int_type sputbackc(char_type c);
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int_type sungetc();
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int_type sputc(char_type c);
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streamsize sputn(const char_type* s, streamsize n){
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if(openedFor & ios_base::app){
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seekoff(0, ios_base::end, ios_base::out);
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}
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return xsputn(s, n);
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}
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protected:
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locale myLocale;
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//Pointers for the "get" buffers
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charT * mgbeg;
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charT * mgnext;
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charT * mgend;
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//Pointers for the "put" buffers
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charT * mpbeg;
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charT * mpnext;
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charT * mpend;
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//In the event of null buffers Lets us know what the buffer is opened for
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ios_base::openmode openedFor;
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basic_streambuf();
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basic_streambuf(const basic_streambuf<char, char_traits<char> > &)
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: myLocale(),
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mgbeg(0), mgnext(0), mgend(0), mpbeg(0), mpnext(0), mpend(0),
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openedFor(0)
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{ }
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basic_streambuf<char, char_traits<char> > & operator=(const basic_streambuf<char, char_traits<char> > &){
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return *this;
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}
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char_type* eback() const{
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return mgbeg;
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}
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char_type* gptr() const{
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return mgnext;
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}
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char_type* egptr() const{
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return mgend;
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}
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void gbump(int n){
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mgnext+=n;
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}
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void setg(char_type* gbeg, char_type* gnext, char_type* gend){
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mgbeg = gbeg;
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mgnext = gnext;
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mgend = gend;
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}
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char_type* pbase() const{
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return mpbeg;
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}
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char_type* pptr() const{
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return mpnext;
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}
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char_type* epptr() const{
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return mpend;
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}
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void pbump(int n){
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mpnext+=n;
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}
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void setp(char_type* pbeg, char_type* pend){
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mpbeg = pbeg;
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mpnext = pbeg;
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mpend = pend;
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}
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virtual void imbue(const locale &loc){
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myLocale = loc;
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}
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//Virtual functions which we will not implement
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virtual basic_streambuf<char_type,traits>* setbuf(char_type* , streamsize){
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return 0;
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}
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virtual pos_type seekoff(off_type , ios_base::seekdir,
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ios_base::openmode = ios_base::in | ios_base::out)
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{
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return 0;
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}
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virtual pos_type seekpos(pos_type , ios_base::openmode = ios_base::in | ios_base::out){
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return 0;
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}
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virtual int sync(){
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return 0;
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}
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virtual int showmanyc(){
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return 0;
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}
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virtual streamsize xsgetn(char_type* , streamsize ){
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return 0;
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}
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virtual int_type underflow(){
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return traits_type::eof();
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}
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virtual int_type uflow(){
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int_type ret = underflow();
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if (!traits_type::eq_int_type(ret, traits_type::eof()))
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gbump(1);
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return ret;
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}
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virtual int_type pbackfail(int_type c = traits::eof()){
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return c;
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}
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virtual streamsize xsputn(const char_type* c, streamsize n){
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//This function is designed to be replaced by subclasses
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for(streamsize i = 0; i< n; ++i){
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if(sputc(c[i]) == traits::eof()){
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return i;
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}
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}
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return n;
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}
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virtual int_type overflow (int_type c = traits::eof()){
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return c;
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}
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};
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typedef basic_streambuf<char> streambuf;
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#ifdef __UCLIBCXX_HAS_WCHAR__
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typedef basic_streambuf<wchar_t> wstreambuf;
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#endif
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//Definitions put below to allow for easy expansion of code
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template <class C, class T> basic_streambuf<C, T>::~basic_streambuf(){ }
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template <class C, class T> locale basic_streambuf<C, T>::pubimbue(const locale &loc){
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locale temp = myLocale;
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myLocale = loc;
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return temp;
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}
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template <class C, class T> streamsize basic_streambuf<C, T>::in_avail(){
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if(mgend !=0 && mgnext !=0){
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return mgend - mgnext;
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}
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return showmanyc();
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}
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template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sbumpc(){
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if(mgbeg == 0 || mgnext == mgend){
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return uflow();
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}
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int_type retval = T::to_int_type(*gptr());
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gbump(1);
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return retval;
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}
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template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::snextc(){
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if(sbumpc() == T::eof() ){
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return T::eof() ;
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}
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return sgetc();
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}
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template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sgetc(){
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if(mgbeg == 0 || mgnext == mgend){
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return underflow();
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}
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return T::to_int_type(*gptr());
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}
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template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sputbackc(char_type c){
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if(mgbeg == 0 || mgnext == mgbeg || !T::eq(c, gptr()[-1] )){
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return pbackfail(T::to_int_type(c));
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}
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gbump(-1);
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return T::to_int_type(*gptr());
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}
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template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sungetc(){
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if(mgbeg == 0 || mgnext == mgbeg){
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return ios_base::failbit;
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}
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gbump(-1);
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return T::to_int_type(*gptr());
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}
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template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sputc(char_type c){
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if(openedFor & ios_base::app){
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seekoff(0, ios_base::end, ios_base::out);
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}
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if(mpnext < mpend){
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*mpnext = c;
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++mpnext;
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}else{
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return overflow( T::to_int_type(c) );
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}
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return T::to_int_type(c);
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}
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template <class C, class T> basic_streambuf<C, T>::basic_streambuf()
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: myLocale(),
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mgbeg(0), mgnext(0), mgend(0), mpbeg(0), mpnext(0), mpend(0),
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openedFor(0)
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{ }
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#ifdef __UCLIBCXX_EXPAND_STREAMBUF_CHAR__
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#ifndef __UCLIBCXX_COMPILE_STREAMBUF__
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#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
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template <> _UCXXEXPORT streambuf::basic_streambuf();
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template <> _UCXXEXPORT streambuf::~basic_streambuf();
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#endif //__UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
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template <> _UCXXEXPORT locale streambuf::pubimbue(const locale &loc);
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template <> _UCXXEXPORT streamsize streambuf::in_avail();
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template <> _UCXXEXPORT streambuf::int_type streambuf::sbumpc();
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template <> _UCXXEXPORT streambuf::int_type streambuf::snextc();
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template <> _UCXXEXPORT streambuf::int_type streambuf::sgetc();
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template <> _UCXXEXPORT streambuf::int_type streambuf::sputbackc(char_type c);
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template <> _UCXXEXPORT streambuf::int_type streambuf::sungetc();
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template <> _UCXXEXPORT streambuf::int_type streambuf::sputc(char_type c);
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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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