98 lines
3.2 KiB
Plaintext
98 lines
3.2 KiB
Plaintext
//Embedded C++ Library
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//Copyright (c) Hitachi,Ltd. 1997
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//Licensed material of Hitachi,Ltd
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//
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// Embeded C++ Library <streambuf>
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//
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//====================================================================
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// File: streambuf
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// Purpose: Definition of class streambuf
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// Create: 1997.09.20 Rev. 1.0
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//====================================================================
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#ifndef _STREAMBUF_
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#define _STREAMBUF_
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#include <ios>
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class streambuf {
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public:
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virtual ~streambuf(){}
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streambuf *pubsetbuf(char *cptr, streamsize nnum){
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return setbuf(cptr, nnum);
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}
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pos_type pubseekoff(off_type off,ios_base::seekdir way,
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ios_base::openmode which
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=(ios_base::openmode)
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(ios_base::in|ios_base::out)){
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return seekoff(off, way, which);
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}
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pos_type pubseekpos(pos_type sp,
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ios_base::openmode which
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=(ios_base::openmode)
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(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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return ((gptr()!=0)&&(gptr()<egptr()) ?
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egptr()-gptr(): showmanyc());
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}
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int_type snextc() {return ((sbumpc()==eof) ? eof:sgetc());}
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int_type sbumpc();
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int_type sgetc();
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int sgetn(char* cptr, streamsize nnum) {return xsgetn( cptr, nnum);}
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int_type sputbackc(char);
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int sungetc();
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int sputc(char);
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int_type sputn(const char *cptr, streamsize nnum)
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{return xsputn( cptr, nnum);}
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enum {eof=-1};
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protected:
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streambuf();
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char *eback() const {return *B_beg_pptr;}
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char *gptr() const {return *B_next_pptr;}
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char *egptr() const {return (*B_next_pptr+(*_B_cnt_ptr));}
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void gbump(int nptr);
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void setg(char *gbeg, char *gnext, char *gend)
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{*B_beg_pptr = gbeg;*B_next_pptr = gnext;B_end_ptr = gend;
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*_B_cnt_ptr=gend-gnext;*_B_len_ptr=gend-gbeg;}
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char *pbase() const {return *B_beg_pptr;}
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char *pptr() const {return *B_next_pptr;}
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char *epptr() const {return (*B_beg_pptr+(*_B_len_ptr));}
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char *_ec2p_getflag() const { return ((char*)C_flg_ptr);}
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void pbump(int nptr);
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void setp(char *pbeg, char *pend)
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{*B_beg_pptr = pbeg;*B_next_pptr = pbeg;B_end_ptr = pend;
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*_B_cnt_ptr=pend-pbeg;*_B_len_ptr=pend-pbeg;}
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virtual streambuf *setbuf(char *, streamsize){ return this; }
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virtual pos_type seekoff(off_type, ios_base::seekdir,
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ios_base::openmode=(ios_base::openmode)
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(ios_base::in|ios_base::out)){ return -1; }
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virtual pos_type seekpos(pos_type, ios_base::openmode=
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(ios_base::openmode)(ios_base::in|ios_base::out)){
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return -1; }
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virtual int sync(){ return 0; }
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virtual int showmanyc(){ return 0; }
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virtual streamsize xsgetn(char *, streamsize);
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virtual int_type underflow(){ return eof; }
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virtual int_type uflow();
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virtual int_type pbackfail(int_type=eof){ return eof; }
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virtual streamsize xsputn(const char *, streamsize);
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virtual int_type overflow(int_type=eof){ return eof; }
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char *& _ec2p_gnptr(){ return (char *&)*B_next_pptr;}
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char *& _ec2p_pnptr(){ return (char *&)*B_next_pptr;}
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void _ec2p_bcntplus(){(*_B_cnt_ptr)++;}
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void _ec2p_bcntminus(){(*_B_cnt_ptr)--;}
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void _ec2p_setbPtr(char**, char**, long*, long*,char*);
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private:
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long *_B_cnt_ptr, *_B_len_ptr;
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char *B_beg_ptr, *B_next_ptr, *B_end_ptr;
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char **B_beg_pptr, **B_next_pptr;
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char *C_flg_ptr;
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};
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#endif
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