source: libcfa/src/fstream.cfa @ c993b15

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// fstream.c --
//
// Author           : Peter A. Buhr
// Created On       : Wed May 27 17:56:53 2015
// Last Modified By : Peter A. Buhr
// Last Modified On : Tue Apr 27 22:08:57 2021
// Update Count     : 442
//

#include "fstream.hfa"                                                                  // also includes iostream.hfa

#include <stdio.h>                                                                              // vfprintf, vfscanf
#include <stdlib.h>                                                                             // exit
#include <stdarg.h>                                                                             // varargs
#include <string.h>                                                                             // strncpy, strerror
#include <assert.h>
#include <errno.h>                                                                              // errno

// *********************************** ofstream ***********************************


#define IO_MSG "I/O error: "

void ?{}( ofstream & os, void * file ) {
        os.file$ = file;
        os.sepDefault$ = true;
        os.sepOnOff$ = false;
        os.nlOnOff$ = true;
        os.prt$ = false;
        os.sawNL$ = false;
        os.acquired$ = false;
        sepSetCur$( os, sepGet( os ) );
        sepSet( os, " " );
        sepSetTuple( os, ", " );
} // ?{}

// private
bool sepPrt$( ofstream & os ) { setNL$( os, false ); return os.sepOnOff$; }
void sepReset$( ofstream & os ) { os.sepOnOff$ = os.sepDefault$; }
void sepReset$( ofstream & os, bool reset ) { os.sepDefault$ = reset; os.sepOnOff$ = os.sepDefault$; }
const char * sepGetCur$( ofstream & os ) { return os.sepCur$; }
void sepSetCur$( ofstream & os, const char sepCur[] ) { os.sepCur$ = sepCur; }
bool getNL$( ofstream & os ) { return os.sawNL$; }
void setNL$( ofstream & os, bool state ) { os.sawNL$ = state; }
bool getANL$( ofstream & os ) { return os.nlOnOff$; }
bool getPrt$( ofstream & os ) { return os.prt$; }
void setPrt$( ofstream & os, bool state ) { os.prt$ = state; }

// public
void ?{}( ofstream & os ) { os.file$ = 0p; }

void ?{}( ofstream & os, const char name[], const char mode[] ) {
        open( os, name, mode );
} // ?{}

void ?{}( ofstream & os, const char name[] ) {
        open( os, name, "w" );
} // ?{}

void ^?{}( ofstream & os ) {
        close( os );
} // ^?{}

void sepOn( ofstream & os ) { os.sepOnOff$ = ! getNL$( os ); }
void sepOff( ofstream & os ) { os.sepOnOff$ = false; }

bool sepDisable( ofstream & os ) {
        bool temp = os.sepDefault$;
        os.sepDefault$ = false;
        sepReset$( os );
        return temp;
} // sepDisable

bool sepEnable( ofstream & os ) {
        bool temp = os.sepDefault$;
        os.sepDefault$ = true;
        if ( os.sepOnOff$ ) sepReset$( os );                            // start of line ?
        return temp;
} // sepEnable

void nlOn( ofstream & os ) { os.nlOnOff$ = true; }
void nlOff( ofstream & os ) { os.nlOnOff$ = false; }

const char * sepGet( ofstream & os ) { return os.separator$; }
void sepSet( ofstream & os, const char s[] ) {
        assert( s );
        strncpy( os.separator$, s, ofstream_sepSize - 1 );
        os.separator$[ofstream_sepSize - 1] = '\0';
} // sepSet

const char * sepGetTuple( ofstream & os ) { return os.tupleSeparator$; }
void sepSetTuple( ofstream & os, const char s[] ) {
        assert( s );
        strncpy( os.tupleSeparator$, s, ofstream_sepSize - 1 );
        os.tupleSeparator$[ofstream_sepSize - 1] = '\0';
} // sepSet

void ends( ofstream & os ) {
        if ( getANL$( os ) ) nl( os );
        else setPrt$( os, false );                                                      // turn off
        if ( &os == &exit ) exit( EXIT_FAILURE );
        if ( &os == &abort ) abort();
        if ( os.acquired$ ) { os.acquired$ = false; release( os ); }
} // ends

bool fail( ofstream & os ) {
        return os.file$ == 0 || ferror( (FILE *)(os.file$) );
} // fail

int flush( ofstream & os ) {
        return fflush( (FILE *)(os.file$) );
} // flush

void open( ofstream & os, const char name[], const char mode[] ) {
        FILE * file = fopen( name, mode );
        #ifdef __CFA_DEBUG__
        if ( file == 0p ) {
                throw (Open_Failure){ os };
                // abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno );
        } // if
        #endif // __CFA_DEBUG__
        (os){ file };
} // open

void open( ofstream & os, const char name[] ) {
        open( os, name, "w" );
} // open

void close( ofstream & os ) {
  if ( (FILE *)(os.file$) == 0p ) return;
  if ( (FILE *)(os.file$) == (FILE *)stdout || (FILE *)(os.file$) == (FILE *)stderr ) return;

        if ( fclose( (FILE *)(os.file$) ) == EOF ) {
                abort | IO_MSG "close output" | nl | strerror( errno );
        } // if
        os.file$ = 0p;
} // close

ofstream & write( ofstream & os, const char data[], size_t size ) {
        if ( fail( os ) ) {
                abort | IO_MSG "attempt write I/O on failed stream";
        } // if

        if ( fwrite( data, 1, size, (FILE *)(os.file$) ) != size ) {
                abort | IO_MSG "write" | nl | strerror( errno );
        } // if
        return os;
} // write

int fmt( ofstream & os, const char format[], ... ) {
        va_list args;
        va_start( args, format );
        int len = vfprintf( (FILE *)(os.file$), format, args );
        if ( len == EOF ) {
                if ( ferror( (FILE *)(os.file$) ) ) {
                        abort | IO_MSG "invalid write";
                } // if
        } // if
        va_end( args );

        setPrt$( os, true );                                                            // called in output cascade
        sepReset$( os );                                                                        // reset separator
        return len;
} // fmt

inline void acquire( ofstream & os ) {
        lock( os.lock$ );
        if ( ! os.acquired$ ) os.acquired$ = true;
        else unlock( os.lock$ );
} // acquire

inline void release( ofstream & os ) {
        unlock( os.lock$ );
} // release

void ?{}( osacquire & acq, ofstream & os ) { &acq.os = &os; lock( os.lock$ ); }
void ^?{}( osacquire & acq ) { release( acq.os ); }

static ofstream soutFile = { (FILE *)stdout };
ofstream & sout = soutFile, & stdout = soutFile;
static ofstream serrFile = { (FILE *)stderr };
ofstream & serr = serrFile, & stderr = serrFile;

static ofstream lsoutFile = { (FILE *)stdout };
ofstream & lsout = lsoutFile;

static ofstream exitFile = { (FILE *)stdout };
ofstream & exit = exitFile;
static ofstream abortFile = { (FILE *)stderr };
ofstream & abort = abortFile;

ofstream & nl( ofstream & os ) {
        nl$( os );                                                                                      // call basic_ostream nl
        flush( os );
        return os;
        // (ofstream &)(os | '\n');
        // setPrt$( os, false );                                                        // turn off
        // setNL$( os, true );
        // flush( os );
        // return sepOff( os );                                                 // prepare for next line
} // nl

// *********************************** ifstream ***********************************


// private
void ?{}( ifstream & is, void * file ) {
        is.file$ = file;
        is.nlOnOff$ = false;
        is.acquired$ = false;
} // ?{}

// public
void ?{}( ifstream & is ) { is.file$ = 0p; }

void ?{}( ifstream & is, const char name[], const char mode[] ) {
        open( is, name, mode );
} // ?{}

void ?{}( ifstream & is, const char name[] ) {
        open( is, name, "r" );
} // ?{}

void ^?{}( ifstream & is ) {
        close( is );
} // ^?{}

void nlOn( ifstream & os ) { os.nlOnOff$ = true; }
void nlOff( ifstream & os ) { os.nlOnOff$ = false; }
bool getANL( ifstream & os ) { return os.nlOnOff$; }

bool fail( ifstream & is ) {
        return is.file$ == 0p || ferror( (FILE *)(is.file$) );
} // fail

void ends( ifstream & is ) {
        if ( is.acquired$ ) { is.acquired$ = false; release( is ); }
} // ends

int eof( ifstream & is ) {
        return feof( (FILE *)(is.file$) );
} // eof

void open( ifstream & is, const char name[], const char mode[] ) {
        FILE * file = fopen( name, mode );
        #ifdef __CFA_DEBUG__
        if ( file == 0p ) {
                throw (Open_Failure){ is };
                // abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno );
        } // if
        #endif // __CFA_DEBUG__
        is.file$ = file;
} // open

void open( ifstream & is, const char name[] ) {
        open( is, name, "r" );
} // open

void close( ifstream & is ) {
  if ( (FILE *)(is.file$) == 0p ) return;
  if ( (FILE *)(is.file$) == (FILE *)stdin ) return;

        if ( fclose( (FILE *)(is.file$) ) == EOF ) {
                abort | IO_MSG "close input" | nl | strerror( errno );
        } // if
        is.file$ = 0p;
} // close

ifstream & read( ifstream & is, char * data, size_t size ) {
        if ( fail( is ) ) {
                abort | IO_MSG "attempt read I/O on failed stream";
        } // if

        if ( fread( data, size, 1, (FILE *)(is.file$) ) == 0 ) {
                abort | IO_MSG "read" | nl | strerror( errno );
        } // if
        return is;
} // read

ifstream &ungetc( ifstream & is, char c ) {
        if ( fail( is ) ) {
                abort | IO_MSG "attempt ungetc I/O on failed stream";
        } // if

        if ( ungetc( c, (FILE *)(is.file$) ) == EOF ) {
                abort | IO_MSG "ungetc" | nl | strerror( errno );
        } // if
        return is;
} // ungetc

int fmt( ifstream & is, const char format[], ... ) {
        va_list args;

        va_start( args, format );
        int len = vfscanf( (FILE *)(is.file$), format, args );
        if ( len == EOF ) {
                if ( ferror( (FILE *)(is.file$) ) ) {
                        abort | IO_MSG "invalid read";
                } // if
        } // if
        va_end( args );
        return len;
} // fmt

inline void acquire( ifstream & is ) {
        lock( is.lock$ );
        if ( ! is.acquired$ ) is.acquired$ = true;
        else unlock( is.lock$ );
} // acquire

inline void release( ifstream & is ) {
        unlock( is.lock$ );
} // release

void ?{}( isacquire & acq, ifstream & is ) { &acq.is = &is; lock( is.lock$ ); }
void ^?{}( isacquire & acq ) { release( acq.is ); }

static ifstream sinFile = { (FILE *)stdin };
ifstream & sin = sinFile, & stdin = sinFile;


// *********************************** exceptions ***********************************


EHM_VIRTUAL_TABLE(Open_Failure, Open_Failure_main_table);
void ?{}( Open_Failure & this, ofstream & ostream ) {
        this.virtual_table = &Open_Failure_main_table;
        this.ostream = &ostream;
        this.tag = 1;
}
void ?{}( Open_Failure & this, ifstream & istream ) {
        this.virtual_table = &Open_Failure_main_table;
        this.istream = &istream;
        this.tag = 0;
}
void throwOpen_Failure( ofstream & ostream ) {
        Open_Failure exc = { ostream };
}
void throwOpen_Failure( ifstream & istream ) {
        Open_Failure exc = { istream };
}

// Local Variables: //
// tab-width: 4 //
// End: //