| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // fstream.c --
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| 8 | //
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| 9 | // Author : Peter A. Buhr
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| 10 | // Created On : Wed May 27 17:56:53 2015
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| 11 | // Last Modified By : Peter A. Buhr
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| 12 | // Last Modified On : Sat Apr 9 14:55:54 2022
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| 13 | // Update Count : 515
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| 14 | //
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| 15 |
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| 16 | #include "fstream.hfa" // also includes iostream.hfa
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| 17 |
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| 18 | #include <stdio.h> // vfprintf, vfscanf
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| 19 | #include <stdlib.h> // exit
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| 20 | #include <stdarg.h> // varargs
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| 21 | #include <string.h> // strncpy, strerror
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| 22 | #include <assert.h>
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| 23 | #include <errno.h> // errno
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| 24 |
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| 25 | // *********************************** ofstream ***********************************
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| 26 |
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| 27 |
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| 28 | #define IO_MSG "I/O error: "
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| 29 |
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| 30 | // private
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| 31 | void ?{}( ofstream & os, void * file ) with( os ) {
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| 32 | file$ = file;
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| 33 | sepDefault$ = true;
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| 34 | sepOnOff$ = false;
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| 35 | nlOnOff$ = true;
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| 36 | prt$ = false;
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| 37 | sawNL$ = false;
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| 38 | sepSetCur$( os, sepGet( os ) );
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| 39 | sepSet( os, " " );
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| 40 | sepSetTuple( os, ", " );
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| 41 | } // ?{}
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| 42 |
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| 43 | inline bool sepPrt$( ofstream & os ) { setNL$( os, false ); return os.sepOnOff$; }
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| 44 | inline void sepReset$( ofstream & os ) { os.sepOnOff$ = os.sepDefault$; }
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| 45 | inline void sepReset$( ofstream & os, bool reset ) { os.sepDefault$ = reset; os.sepOnOff$ = os.sepDefault$; }
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| 46 | inline const char * sepGetCur$( ofstream & os ) { return os.sepCur$; }
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| 47 | inline void sepSetCur$( ofstream & os, const char sepCur[] ) { os.sepCur$ = sepCur; }
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| 48 | inline bool getNL$( ofstream & os ) { return os.sawNL$; }
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| 49 | inline void setNL$( ofstream & os, bool state ) { os.sawNL$ = state; }
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| 50 | inline bool getANL$( ofstream & os ) { return os.nlOnOff$; }
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| 51 | inline bool getPrt$( ofstream & os ) { return os.prt$; }
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| 52 | inline void setPrt$( ofstream & os, bool state ) { os.prt$ = state; }
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| 53 |
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| 54 | inline void lock( ofstream & os ) with( os ) { lock( os.lock$ ); }
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| 55 | inline void unlock( ofstream & os ) { unlock( os.lock$ ); }
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| 56 |
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| 57 | // public
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| 58 | void ?{}( ofstream & os ) { os.file$ = 0p; }
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| 59 | void ?{}( ofstream & os, const char name[], const char mode[] ) { open( os, name, mode ); }
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| 60 | void ?{}( ofstream & os, const char name[] ) { open( os, name, "w" ); }
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| 61 | void ^?{}( ofstream & os ) { close( os ); }
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| 62 |
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| 63 | void sepOn( ofstream & os ) { os.sepOnOff$ = ! getNL$( os ); }
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| 64 | void sepOff( ofstream & os ) { os.sepOnOff$ = false; }
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| 65 |
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| 66 | bool sepDisable( ofstream & os ) {
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| 67 | bool temp = os.sepDefault$;
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| 68 | os.sepDefault$ = false;
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| 69 | sepReset$( os );
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| 70 | return temp;
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| 71 | } // sepDisable
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| 72 |
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| 73 | bool sepEnable( ofstream & os ) {
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| 74 | bool temp = os.sepDefault$;
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| 75 | os.sepDefault$ = true;
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| 76 | if ( os.sepOnOff$ ) sepReset$( os ); // start of line ?
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| 77 | return temp;
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| 78 | } // sepEnable
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| 79 |
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| 80 | void nlOn( ofstream & os ) { os.nlOnOff$ = true; }
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| 81 | void nlOff( ofstream & os ) { os.nlOnOff$ = false; }
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| 82 |
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| 83 | const char * sepGet( ofstream & os ) { return os.separator$; }
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| 84 | void sepSet( ofstream & os, const char s[] ) {
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| 85 | assert( s );
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| 86 | strncpy( os.separator$, s, ofstream_sepSize - 1 );
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| 87 | os.separator$[ofstream_sepSize - 1] = '\0';
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| 88 | } // sepSet
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| 89 |
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| 90 | const char * sepGetTuple( ofstream & os ) { return os.tupleSeparator$; }
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| 91 | void sepSetTuple( ofstream & os, const char s[] ) {
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| 92 | assert( s );
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| 93 | strncpy( os.tupleSeparator$, s, ofstream_sepSize - 1 );
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| 94 | os.tupleSeparator$[ofstream_sepSize - 1] = '\0';
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| 95 | } // sepSet
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| 96 |
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| 97 | void ends( ofstream & os ) {
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| 98 | if ( getANL$( os ) ) nl( os );
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| 99 | else setPrt$( os, false ); // turn off
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| 100 | if ( &os == &exit ) exit( EXIT_FAILURE );
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| 101 | if ( &os == &abort ) abort();
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| 102 | } // ends
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| 103 |
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| 104 | bool fail( ofstream & os ) { return os.file$ == 0 || ferror( (FILE *)(os.file$) ); }
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| 105 | void clear( ofstream & os ) { clearerr( (FILE *)(os.file$) ); }
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| 106 | int flush( ofstream & os ) { return fflush( (FILE *)(os.file$) ); }
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| 107 |
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| 108 | void open( ofstream & os, const char name[], const char mode[] ) {
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| 109 | FILE * file;
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| 110 | for ( cnt; 10 ) {
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| 111 | errno = 0;
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| 112 | file = fopen( name, mode );
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| 113 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ?
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| 114 | if ( cnt == 9 ) abort( "ofstream open EINTR spinning exceeded" );
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| 115 | } // for
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| 116 | if ( file == 0p ) {
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| 117 | throw (Open_Failure){ os };
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| 118 | // abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno );
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| 119 | } // if
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| 120 | (os){ file }; // initialize
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| 121 | } // open
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| 122 |
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| 123 | void open( ofstream & os, const char name[] ) { open( os, name, "w" ); }
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| 124 |
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| 125 | void close( ofstream & os ) with( os ) {
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| 126 | if ( (FILE *)(file$) == 0p ) return;
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| 127 | if ( (FILE *)(file$) == (FILE *)stdout || (FILE *)(file$) == (FILE *)stderr ) return;
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| 128 |
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| 129 | int ret;
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| 130 | for ( cnt; 10 ) {
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| 131 | errno = 0;
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| 132 | ret = fclose( (FILE *)(file$) );
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| 133 | if ( ret != EOF || errno != EINTR ) break; // timer interrupt ?
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| 134 | if ( cnt == 9 ) abort( "ofstream open EINTR spinning exceeded" );
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| 135 | } // for
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| 136 | if ( ret == EOF ) {
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| 137 | throw (Close_Failure){ os };
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| 138 | // abort | IO_MSG "close output" | nl | strerror( errno );
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| 139 | } // if
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| 140 | file$ = 0p; // safety after close
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| 141 | } // close
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| 142 |
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| 143 | ofstream & write( ofstream & os, const char data[], size_t size ) {
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| 144 | if ( fail( os ) ) {
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| 145 | throw (Write_Failure){ os };
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| 146 | // abort | IO_MSG "attempt write I/O on failed stream";
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| 147 | } // if
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| 148 |
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| 149 | if ( fwrite( data, 1, size, (FILE *)(os.file$) ) != size ) {
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| 150 | throw (Write_Failure){ os };
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| 151 | // abort | IO_MSG "write" | nl | strerror( errno );
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| 152 | } // if
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| 153 | return os;
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| 154 | } // write
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| 155 |
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| 156 | int fmt( ofstream & os, const char format[], ... ) {
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| 157 | va_list args;
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| 158 | va_start( args, format );
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| 159 |
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| 160 | int len;
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| 161 | for ( cnt; 10 ) {
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| 162 | errno = 0;
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| 163 | disable_interrupts();
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| 164 | len = vfprintf( (FILE *)(os.file$), format, args );
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| 165 | enable_interrupts();
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| 166 | if ( len != EOF || errno != EINTR ) break; // timer interrupt ?
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| 167 | if ( cnt == 9 ) abort( "ofstream fmt EINTR spinning exceeded" );
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| 168 | } // for
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| 169 | if ( len == EOF ) {
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| 170 | if ( ferror( (FILE *)(os.file$) ) ) {
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| 171 | abort | IO_MSG "invalid write";
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| 172 | } // if
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| 173 | } // if
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| 174 | va_end( args );
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| 175 |
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| 176 | setPrt$( os, true ); // called in output cascade
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| 177 | sepReset$( os ); // reset separator
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| 178 | return len;
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| 179 | } // fmt
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| 180 |
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| 181 | static ofstream soutFile = { (FILE *)stdout };
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| 182 | ofstream & sout = soutFile, & stdout = soutFile;
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| 183 | static ofstream serrFile = { (FILE *)stderr };
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| 184 | ofstream & serr = serrFile, & stderr = serrFile;
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| 185 |
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| 186 | static ofstream lsoutFile = { (FILE *)stdout };
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| 187 | ofstream & lsout = lsoutFile;
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| 188 |
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| 189 | static ofstream exitFile = { (FILE *)stdout };
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| 190 | ofstream & exit = exitFile;
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| 191 | static ofstream abortFile = { (FILE *)stderr };
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| 192 | ofstream & abort = abortFile;
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| 193 |
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| 194 | ofstream & nl( ofstream & os ) {
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| 195 | nl$( os ); // call basic_ostream nl
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| 196 | flush( os );
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| 197 | return os;
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| 198 | } // nl
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| 199 |
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| 200 |
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| 201 | // *********************************** ifstream ***********************************
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| 202 |
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| 203 |
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| 204 | // private
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| 205 | void ?{}( ifstream & is, void * file ) with( is ) {
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| 206 | file$ = file;
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| 207 | nlOnOff$ = false;
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| 208 | } // ?{}
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| 209 |
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| 210 | bool getANL$( ifstream & os ) { return os.nlOnOff$; }
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| 211 |
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| 212 | inline void lock( ifstream & os ) with( os ) { lock( os.lock$ ); }
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| 213 | inline void unlock( ifstream & os ) { unlock( os.lock$ ); }
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| 214 |
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| 215 | // public
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| 216 | void ?{}( ifstream & is ) { is.file$ = 0p; }
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| 217 | void ?{}( ifstream & is, const char name[], const char mode[] ) { open( is, name, mode ); }
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| 218 | void ?{}( ifstream & is, const char name[] ) { open( is, name, "r" ); }
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| 219 | void ^?{}( ifstream & is ) { close( is ); }
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| 220 |
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| 221 | bool fail( ifstream & is ) { return is.file$ == 0p || ferror( (FILE *)(is.file$) ); }
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| 222 | void clear( ifstream & is ) { clearerr( (FILE *)(is.file$) ); }
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| 223 |
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| 224 | void nlOn( ifstream & os ) { os.nlOnOff$ = true; }
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| 225 | void nlOff( ifstream & os ) { os.nlOnOff$ = false; }
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| 226 |
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| 227 | void ends( ifstream & is ) {}
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| 228 |
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| 229 | bool eof( ifstream & is ) { return feof( (FILE *)(is.file$) ) != 0; }
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| 230 |
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| 231 | void open( ifstream & is, const char name[], const char mode[] ) {
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| 232 | FILE * file;
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| 233 | for ( cnt; 10 ) {
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| 234 | errno = 0;
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| 235 | file = fopen( name, mode );
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| 236 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ?
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| 237 | if ( cnt == 9 ) abort( "ifstream open EINTR spinning exceeded" );
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| 238 | } // for
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| 239 | if ( file == 0p ) {
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| 240 | throw (Open_Failure){ is };
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| 241 | // abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno );
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| 242 | } // if
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| 243 | (is){ file }; // initialize
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| 244 | } // open
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| 245 |
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| 246 | void open( ifstream & is, const char name[] ) { open( is, name, "r" ); }
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| 247 |
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| 248 | void close( ifstream & is ) with( is ) {
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| 249 | if ( (FILE *)(file$) == 0p ) return;
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| 250 | if ( (FILE *)(file$) == (FILE *)stdin ) return;
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| 251 |
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| 252 | int ret;
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| 253 | for ( cnt; 10 ) {
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| 254 | errno = 0;
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| 255 | ret = fclose( (FILE *)(file$) );
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| 256 | if ( ret != EOF || errno != EINTR ) break; // timer interrupt ?
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| 257 | if ( cnt == 9 ) abort( "ifstream close EINTR spinning exceeded" );
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| 258 | } // for
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| 259 | if ( ret == EOF ) {
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| 260 | throw (Close_Failure){ is };
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| 261 | // abort | IO_MSG "close input" | nl | strerror( errno );
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| 262 | } // if
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| 263 | file$ = 0p; // safety after close
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| 264 | } // close
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| 265 |
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| 266 | ifstream & read( ifstream & is, char data[], size_t size ) {
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| 267 | if ( fail( is ) ) {
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| 268 | throw (Read_Failure){ is };
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| 269 | // abort | IO_MSG "attempt read I/O on failed stream";
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| 270 | } // if
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| 271 |
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| 272 | if ( fread( data, size, 1, (FILE *)(is.file$) ) == 0 ) {
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| 273 | throw (Read_Failure){ is };
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| 274 | // abort | IO_MSG "read" | nl | strerror( errno );
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| 275 | } // if
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| 276 | return is;
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| 277 | } // read
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| 278 |
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| 279 | ifstream &ungetc( ifstream & is, char c ) {
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| 280 | if ( fail( is ) ) {
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| 281 | abort | IO_MSG "attempt ungetc I/O on failed stream";
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| 282 | } // if
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| 283 |
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| 284 | if ( ungetc( c, (FILE *)(is.file$) ) == EOF ) {
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| 285 | abort | IO_MSG "ungetc" | nl | strerror( errno );
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| 286 | } // if
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| 287 | return is;
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| 288 | } // ungetc
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| 289 |
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| 290 | int fmt( ifstream & is, const char format[], ... ) {
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| 291 | va_list args;
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| 292 | va_start( args, format );
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| 293 |
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| 294 | int len;
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| 295 | for () { // no check for EINTR limit waiting for keyboard input
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| 296 | errno = 0;
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| 297 | disable_interrupts();
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| 298 | len = vfscanf( (FILE *)(is.file$), format, args );
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| 299 | enable_interrupts();
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| 300 | if ( len != EOF || errno != EINTR ) break; // timer interrupt ?
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| 301 | } // for
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| 302 | if ( len == EOF ) {
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| 303 | if ( ferror( (FILE *)(is.file$) ) ) {
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| 304 | abort | IO_MSG "invalid read";
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| 305 | } // if
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| 306 | } // if
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| 307 | va_end( args );
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| 308 | return len;
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| 309 | } // fmt
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| 310 |
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| 311 | static ifstream sinFile = { (FILE *)stdin };
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| 312 | ifstream & sin = sinFile, & stdin = sinFile;
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| 313 |
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| 314 |
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| 315 | // *********************************** exceptions ***********************************
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| 316 |
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| 317 |
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| 318 | static vtable(Open_Failure) Open_Failure_vt;
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| 319 |
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| 320 | // exception I/O constructors
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| 321 | void ?{}( Open_Failure & ex, ofstream & ostream ) with(ex) {
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| 322 | virtual_table = &Open_Failure_vt;
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| 323 | ostream = &ostream;
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| 324 | tag = 1;
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| 325 | } // ?{}
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| 326 |
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| 327 | void ?{}( Open_Failure & ex, ifstream & istream ) with(ex) {
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| 328 | virtual_table = &Open_Failure_vt;
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| 329 | istream = &istream;
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| 330 | tag = 0;
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| 331 | } // ?{}
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| 332 |
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| 333 |
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| 334 | static vtable(Close_Failure) Close_Failure_vt;
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| 335 |
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| 336 | // exception I/O constructors
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| 337 | void ?{}( Close_Failure & ex, ofstream & ostream ) with(ex) {
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| 338 | virtual_table = &Close_Failure_vt;
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| 339 | ostream = &ostream;
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| 340 | tag = 1;
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| 341 | } // ?{}
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| 342 |
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| 343 | void ?{}( Close_Failure & ex, ifstream & istream ) with(ex) {
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| 344 | virtual_table = &Close_Failure_vt;
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| 345 | istream = &istream;
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| 346 | tag = 0;
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| 347 | } // ?{}
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| 348 |
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| 349 |
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| 350 | static vtable(Write_Failure) Write_Failure_vt;
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| 351 |
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| 352 | // exception I/O constructors
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| 353 | void ?{}( Write_Failure & ex, ofstream & ostream ) with(ex) {
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| 354 | virtual_table = &Write_Failure_vt;
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| 355 | ostream = &ostream;
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| 356 | tag = 1;
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| 357 | } // ?{}
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| 358 |
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| 359 | void ?{}( Write_Failure & ex, ifstream & istream ) with(ex) {
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| 360 | virtual_table = &Write_Failure_vt;
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| 361 | istream = &istream;
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| 362 | tag = 0;
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| 363 | } // ?{}
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| 364 |
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| 365 |
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| 366 | static vtable(Read_Failure) Read_Failure_vt;
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| 367 |
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| 368 | // exception I/O constructors
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| 369 | void ?{}( Read_Failure & ex, ofstream & ostream ) with(ex) {
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| 370 | virtual_table = &Read_Failure_vt;
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| 371 | ostream = &ostream;
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| 372 | tag = 1;
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| 373 | } // ?{}
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| 374 |
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| 375 | void ?{}( Read_Failure & ex, ifstream & istream ) with(ex) {
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| 376 | virtual_table = &Read_Failure_vt;
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| 377 | istream = &istream;
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| 378 | tag = 0;
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| 379 | } // ?{}
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| 380 |
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| 381 | // void throwOpen_Failure( ofstream & ostream ) {
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| 382 | // Open_Failure exc = { ostream };
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| 383 | // }
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| 384 |
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| 385 | // void throwOpen_Failure( ifstream & istream ) {
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| 386 | // Open_Failure exc = { istream };
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| 387 | // }
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| 388 |
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| 389 | // Local Variables: //
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| 390 | // tab-width: 4 //
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| 391 | // End: //
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