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/* Copyright (C) 2004 Garrett A. Kajmowicz
This file is part of the uClibc++ Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <basic_definitions>
#include <locale>
#include <string>
#include <iosfwd>
#ifndef HEADER_STD_STREAMBUF
#define HEADER_STD_STREAMBUF 1
#include <ios>
#pragma GCC visibility push(default)
namespace std{
template <class charT, class traits> class _UCXXEXPORT basic_streambuf{
public:
#ifdef __UCLIBCXX_SUPPORT_CDIR__
friend ios_base::Init::Init();
#endif
// Types:
typedef charT char_type;
typedef typename traits::int_type int_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
typedef traits traits_type;
virtual ~basic_streambuf();
locale pubimbue(const locale &loc);
locale getloc() const{
return myLocale;
}
basic_streambuf<char_type,traits>* pubsetbuf(char_type* s, streamsize n){
return setbuf(s,n);
}
pos_type pubseekoff(off_type off,
typename ios_base::seekdir way,
ios_base::openmode which = ios_base::in |
ios_base::out
)
{
return seekoff(off,way,which);
}
pos_type pubseekpos(pos_type sp, ios_base::openmode which = ios_base::in | ios_base::out){
return seekpos(sp,which);
}
int pubsync(){
return sync();
}
streamsize in_avail();
int_type snextc();
int_type sbumpc();
int_type sgetc();
streamsize sgetn(char_type* s, streamsize n){
return xsgetn(s,n);
}
int_type sputbackc(char_type c);
int_type sungetc();
int_type sputc(char_type c);
streamsize sputn(const char_type* s, streamsize n){
if(openedFor & ios_base::app){
seekoff(0, ios_base::end, ios_base::out);
}
return xsputn(s, n);
}
protected:
locale myLocale;
//Pointers for the "get" buffers
charT * mgbeg;
charT * mgnext;
charT * mgend;
//Pointers for the "put" buffers
charT * mpbeg;
charT * mpnext;
charT * mpend;
//In the event of null buffers Lets us know what the buffer is opened for
ios_base::openmode openedFor;
basic_streambuf();
basic_streambuf(const basic_streambuf<char, char_traits<char> > &)
: myLocale(),
mgbeg(0), mgnext(0), mgend(0), mpbeg(0), mpnext(0), mpend(0),
openedFor(0)
{ }
basic_streambuf<char, char_traits<char> > & operator=(const basic_streambuf<char, char_traits<char> > &){
return *this;
}
char_type* eback() const{
return mgbeg;
}
char_type* gptr() const{
return mgnext;
}
char_type* egptr() const{
return mgend;
}
void gbump(int n){
mgnext+=n;
}
void setg(char_type* gbeg, char_type* gnext, char_type* gend){
mgbeg = gbeg;
mgnext = gnext;
mgend = gend;
}
char_type* pbase() const{
return mpbeg;
}
char_type* pptr() const{
return mpnext;
}
char_type* epptr() const{
return mpend;
}
void pbump(int n){
mpnext+=n;
}
void setp(char_type* pbeg, char_type* pend){
mpbeg = pbeg;
mpnext = pbeg;
mpend = pend;
}
virtual void imbue(const locale &loc){
myLocale = loc;
}
//Virtual functions which we will not implement
virtual basic_streambuf<char_type,traits>* setbuf(char_type* , streamsize){
return 0;
}
virtual pos_type seekoff(off_type , ios_base::seekdir,
ios_base::openmode = ios_base::in | ios_base::out)
{
return 0;
}
virtual pos_type seekpos(pos_type , ios_base::openmode = ios_base::in | ios_base::out){
return 0;
}
virtual int sync(){
return 0;
}
virtual int showmanyc(){
return 0;
}
virtual streamsize xsgetn(char_type* , streamsize ){
return 0;
}
virtual int_type underflow(){
return traits_type::eof();
}
virtual int_type uflow(){
int_type ret = underflow();
if (!traits_type::eq_int_type(ret, traits_type::eof()))
gbump(1);
return ret;
}
virtual int_type pbackfail(int_type c = traits::eof()){
return c;
}
virtual streamsize xsputn(const char_type* c, streamsize n){
//This function is designed to be replaced by subclasses
for(streamsize i = 0; i< n; ++i){
if(sputc(c[i]) == traits::eof()){
return i;
}
}
return n;
}
virtual int_type overflow (int_type c = traits::eof()){
return c;
}
};
typedef basic_streambuf<char> streambuf;
#ifdef __UCLIBCXX_HAS_WCHAR__
typedef basic_streambuf<wchar_t> wstreambuf;
#endif
//Definitions put below to allow for easy expansion of code
template <class C, class T> basic_streambuf<C, T>::~basic_streambuf(){ }
template <class C, class T> locale basic_streambuf<C, T>::pubimbue(const locale &loc){
locale temp = myLocale;
myLocale = loc;
return temp;
}
template <class C, class T> streamsize basic_streambuf<C, T>::in_avail(){
if(mgend !=0 && mgnext !=0){
return mgend - mgnext;
}
return showmanyc();
}
template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sbumpc(){
if(mgbeg == 0 || mgnext == mgend){
return uflow();
}
int_type retval = T::to_int_type(*gptr());
gbump(1);
return retval;
}
template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::snextc(){
if(sbumpc() == T::eof() ){
return T::eof() ;
}
return sgetc();
}
template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sgetc(){
if(mgbeg == 0 || mgnext == mgend){
return underflow();
}
return T::to_int_type(*gptr());
}
template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sputbackc(char_type c){
if(mgbeg == 0 || mgnext == mgbeg || !T::eq(c, gptr()[-1] )){
return pbackfail(T::to_int_type(c));
}
gbump(-1);
return T::to_int_type(*gptr());
}
template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sungetc(){
if(mgbeg == 0 || mgnext == mgbeg){
return ios_base::failbit;
}
gbump(-1);
return T::to_int_type(*gptr());
}
template <class C, class T> typename basic_streambuf<C, T>::int_type basic_streambuf<C, T>::sputc(char_type c){
if(openedFor & ios_base::app){
seekoff(0, ios_base::end, ios_base::out);
}
if(mpnext < mpend){
*mpnext = c;
++mpnext;
}else{
return overflow( T::to_int_type(c) );
}
return T::to_int_type(c);
}
template <class C, class T> basic_streambuf<C, T>::basic_streambuf()
: myLocale(),
mgbeg(0), mgnext(0), mgend(0), mpbeg(0), mpnext(0), mpend(0),
openedFor(0)
{ }
#ifdef __UCLIBCXX_EXPAND_STREAMBUF_CHAR__
#ifndef __UCLIBCXX_COMPILE_STREAMBUF__
#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
template <> _UCXXEXPORT streambuf::basic_streambuf();
template <> _UCXXEXPORT streambuf::~basic_streambuf();
#endif //__UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
template <> _UCXXEXPORT locale streambuf::pubimbue(const locale &loc);
template <> _UCXXEXPORT streamsize streambuf::in_avail();
template <> _UCXXEXPORT streambuf::int_type streambuf::sbumpc();
template <> _UCXXEXPORT streambuf::int_type streambuf::snextc();
template <> _UCXXEXPORT streambuf::int_type streambuf::sgetc();
template <> _UCXXEXPORT streambuf::int_type streambuf::sputbackc(char_type c);
template <> _UCXXEXPORT streambuf::int_type streambuf::sungetc();
template <> _UCXXEXPORT streambuf::int_type streambuf::sputc(char_type c);
#endif
#endif
}
#pragma GCC visibility pop
#endif
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