/usr/include/ptlib/wince/streamb.h is in libpt-1.10.10-dev 1.10.10-3.1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// (c) 2000 Yuriy Govitovskiy,
// for Openh323, www.Openh323.org
//
// Windows CE Port
//
// streamb.h - definitions/declarations for the streambuf class
//
// [Microsoft]
// [AT&T C++]
//
// [Public]
#ifdef __cplusplus
#ifndef _INC_STREAMB
#define _INC_STREAMB
#include <ios.h> // need ios::seek_dir definition
#ifndef NULL
#define NULL 0
#endif
#ifndef EOF
#define EOF (-1)
#endif
typedef long streampos, streamoff;
class ios;
class streambuf
{
public:
virtual ~streambuf();
inline int in_avail() const;
inline int out_waiting() const;
int sgetc();
int snextc();
int sbumpc();
void stossc();
inline int sputbackc(char);
inline int sputc(int);
inline int sputn(const char *,int);
inline int sgetn(char *,int);
virtual int sync();
virtual streambuf* setbuf(char *, int);
virtual streampos seekoff(streamoff,ios::seek_dir,int =ios::in|ios::out);
virtual streampos seekpos(streampos,int =ios::in|ios::out);
virtual int xsputn(const char *,int);
virtual int xsgetn(char *,int);
virtual int overflow(int =EOF) = 0; // pure virtual function
virtual int underflow() = 0; // pure virtual function
virtual int pbackfail(int);
void dbp();
void lock() { }
void unlock() { }
protected:
streambuf();
streambuf(char *,int);
inline char * base() const;
inline char * ebuf() const;
inline char * pbase() const;
inline char * pptr() const;
inline char * epptr() const;
inline char * eback() const;
inline char * gptr() const;
inline char * egptr() const;
inline int blen() const;
inline void setp(char *,char *);
inline void setg(char *,char *,char *);
inline void pbump(int);
inline void gbump(int);
void setb(char *,char *,int =0);
inline int unbuffered() const;
inline void unbuffered(int);
int allocate();
virtual int doallocate();
private:
int _fAlloc;
int _fUnbuf;
int x_lastc;
char * _base;
char * _ebuf;
char * _pbase;
char * _pptr;
char * _epptr;
char * _eback;
char * _gptr;
char * _egptr;
};
inline int streambuf::in_avail() const { return (gptr()<_egptr) ? (_egptr-gptr()) : 0; }
inline int streambuf::out_waiting() const { return (_pptr>=_pbase) ? (_pptr-_pbase) : 0; }
inline int streambuf::sputbackc(char _c){ return (_eback<gptr()) ? *(--_gptr)=_c : pbackfail(_c); }
inline int streambuf::sputc(int _i){ return (_pptr<_epptr) ? (unsigned char)(*(_pptr++)=(char)_i) : overflow(_i);}
inline int streambuf::sputn(const char * _str,int _n) { return xsputn(_str, _n); }
inline int streambuf::sgetn(char * _str,int _n) { return xsgetn(_str, _n); }
inline char * streambuf::base() const { return _base; }
inline char * streambuf::ebuf() const { return _ebuf; }
inline int streambuf::blen() const {return ((_ebuf > _base) ? (_ebuf-_base) : 0); }
inline char * streambuf::pbase() const { return _pbase; }
inline char * streambuf::pptr() const { return _pptr; }
inline char * streambuf::epptr() const { return _epptr; }
inline char * streambuf::eback() const { return _eback; }
inline char * streambuf::gptr() const { return _gptr; }
inline char * streambuf::egptr() const { return _egptr; }
inline void streambuf::gbump(int _n) { if (_egptr) _gptr += _n; }
inline void streambuf::pbump(int _n) { if (_epptr) _pptr += _n; }
inline void streambuf::setg(char * _eb, char * _g, char * _eg) {_eback=_eb; _gptr=_g; _egptr=_eg; x_lastc=EOF; }
inline void streambuf::setp(char * _p, char * _ep) {_pptr=_pbase=_p; _epptr=_ep; }
inline int streambuf::unbuffered() const { return _fUnbuf; }
inline void streambuf::unbuffered(int _f) { _fUnbuf = _f; }
#endif // _INC_STREAMB
#endif /* __cplusplus */
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