| 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 : Wed Nov 15 10:51:14 2023
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| 13 | // Update Count : 552
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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 | #pragma GCC visibility push(default)
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| 26 |
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| 27 |
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| 28 | // *********************************** ofstream ***********************************
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| 29 |
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| 30 |
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| 31 | #define IO_MSG "I/O error: "
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| 32 |
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| 33 | // private
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| 34 | void ?{}( ofstream & os, void * file ) with( os ) {
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| 35 | file$ = file;
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| 36 | sepDefault$ = true;
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| 37 | sepOnOff$ = false;
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| 38 | nlOnOff$ = true;
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| 39 | prt$ = false;
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| 40 | sawNL$ = false;
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| 41 | sepSetCur$( os, sepGet( os ) );
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| 42 | sepSet( os, " " );
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| 43 | sepSetTuple( os, ", " );
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| 44 | } // ?{}
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| 45 |
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| 46 | inline bool getNL$( ofstream & os ) { return os.sawNL$; }
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| 47 | inline bool setNL$( ofstream & os, bool state ) { bool temp = os.sawNL$; os.sawNL$ = state; return temp; }
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| 48 | inline bool getANL$( ofstream & os ) { return os.nlOnOff$; }
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| 49 | inline bool setANL$( ofstream & os, bool state ) { bool temp = os.nlOnOff$; os.nlOnOff$ = state; return temp; }
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| 50 |
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| 51 | inline bool sepPrt$( ofstream & os ) { setNL$( os, false ); return os.sepOnOff$; }
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| 52 | inline void sepReset$( ofstream & os ) { os.sepOnOff$ = os.sepDefault$; }
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| 53 | inline void sepReset$( ofstream & os, bool reset ) { os.sepDefault$ = reset; os.sepOnOff$ = os.sepDefault$; }
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| 54 | inline const char * sepGetCur$( ofstream & os ) { return os.sepCur$; }
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| 55 | inline void sepSetCur$( ofstream & os, const char sepCur[] ) { os.sepCur$ = sepCur; }
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| 56 |
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| 57 | inline bool getPrt$( ofstream & os ) { return os.prt$; }
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| 58 | inline bool setPrt$( ofstream & os, bool state ) { bool temp = os.prt$; os.prt$ = state; return temp; }
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| 59 |
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| 60 | inline void lock( ofstream & os ) with( os ) { lock( os.lock$ ); }
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| 61 | inline void unlock( ofstream & os ) { unlock( os.lock$ ); }
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| 62 |
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| 63 | // public
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| 64 | void ?{}( ofstream & os ) { os.file$ = 0p; }
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| 65 | void ?{}( ofstream & os, const char name[], const char mode[] ) { open( os, name, mode ); }
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| 66 | void ?{}( ofstream & os, const char name[] ) { open( os, name, "w" ); }
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| 67 | void ^?{}( ofstream & os ) { close( os ); }
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| 68 |
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| 69 | void nlOn( ofstream & os ) { os.nlOnOff$ = true; }
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| 70 | void nlOff( ofstream & os ) { os.nlOnOff$ = false; }
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| 71 |
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| 72 | void sep( ofstream & os ) { os.sepOnOff$ = ! getNL$( os ); }
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| 73 | void nosep( ofstream & os ) { os.sepOnOff$ = false; }
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| 74 |
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| 75 | bool sepOn( ofstream & os ) {
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| 76 | bool temp = os.sepDefault$;
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| 77 | os.sepDefault$ = true;
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| 78 | if ( os.sepOnOff$ ) sepReset$( os ); // start of line ?
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| 79 | return temp;
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| 80 | } // sepOn
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| 81 |
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| 82 | bool sepOff( ofstream & os ) {
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| 83 | bool temp = os.sepDefault$;
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| 84 | os.sepDefault$ = false;
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| 85 | sepReset$( os );
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| 86 | return temp;
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| 87 | } // sepOff
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| 88 |
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| 89 | const char * sepGet( ofstream & os ) { return os.separator$; }
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| 90 | void sepSet( ofstream & os, const char s[] ) {
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| 91 | assert( s );
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| 92 | strncpy( os.separator$, s, ofstream_sepSize - 1 );
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| 93 | os.separator$[ofstream_sepSize - 1] = '\0';
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| 94 | } // sepSet
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| 95 |
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| 96 | const char * sepGetTuple( ofstream & os ) { return os.tupleSeparator$; }
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| 97 | void sepSetTuple( ofstream & os, const char s[] ) {
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| 98 | assert( s );
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| 99 | strncpy( os.tupleSeparator$, s, ofstream_sepSize - 1 );
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| 100 | os.tupleSeparator$[ofstream_sepSize - 1] = '\0';
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| 101 | } // sepSet
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| 102 |
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| 103 | void ends( ofstream & os ) {
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| 104 | if ( getANL$( os ) ) nl( os );
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| 105 | else setPrt$( os, false ); // turn off
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| 106 | if ( &os == &exit ) exit( EXIT_FAILURE );
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| 107 | if ( &os == &abort ) abort();
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| 108 | } // ends
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| 109 |
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| 110 | bool fail( ofstream & os ) { return os.file$ == 0 || ferror( (FILE *)(os.file$) ); }
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| 111 | void clear( ofstream & os ) { clearerr( (FILE *)(os.file$) ); }
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| 112 | int flush( ofstream & os ) { return fflush( (FILE *)(os.file$) ); }
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| 113 |
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| 114 | void open( ofstream & os, const char name[], const char mode[] ) {
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| 115 | FILE * file;
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| 116 | for ( cnt; 10 ) {
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| 117 | errno = 0;
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| 118 | file = fopen( name, mode );
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| 119 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ?
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| 120 | if ( cnt == 9 ) abort( "ofstream open EINTR spinning exceeded" );
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| 121 | } // for
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| 122 | if ( file == 0p ) {
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| 123 | throw (open_failure){ os };
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| 124 | // abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno );
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| 125 | } // if
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| 126 | (os){ file }; // initialize
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| 127 | } // open
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| 128 |
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| 129 | void open( ofstream & os, const char name[] ) { open( os, name, "w" ); }
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| 130 |
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| 131 | void close( ofstream & os ) with( os ) {
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| 132 | if ( (FILE *)(file$) == 0p ) return;
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| 133 | if ( (FILE *)(file$) == (FILE *)stdout || (FILE *)(file$) == (FILE *)stderr ) return;
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| 134 |
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| 135 | int ret;
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| 136 | for ( cnt; 10 ) {
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| 137 | errno = 0;
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| 138 | ret = fclose( (FILE *)(file$) );
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| 139 | if ( ret != EOF || errno != EINTR ) break; // timer interrupt ?
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| 140 | if ( cnt == 9 ) abort( "ofstream open EINTR spinning exceeded" );
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| 141 | } // for
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| 142 | if ( ret == EOF ) {
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| 143 | throw (close_failure){ os };
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| 144 | // abort | IO_MSG "close output" | nl | strerror( errno );
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| 145 | } // if
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| 146 | file$ = 0p; // safety after close
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| 147 | } // close
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| 148 |
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| 149 | ofstream & write( ofstream & os, const char data[], size_t size ) {
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| 150 | if ( fail( os ) ) {
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| 151 | throw (write_failure){ os };
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| 152 | // abort | IO_MSG "attempt write I/O on failed stream";
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| 153 | } // if
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| 154 |
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| 155 | if ( fwrite( data, 1, size, (FILE *)(os.file$) ) != size ) {
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| 156 | throw (write_failure){ os };
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| 157 | // abort | IO_MSG "write" | nl | strerror( errno );
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| 158 | } // if
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| 159 | return os;
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| 160 | } // write
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| 161 |
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| 162 | int fmt( ofstream & os, const char format[], ... ) {
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| 163 | va_list args;
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| 164 | va_start( args, format );
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| 165 |
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| 166 | int len;
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| 167 | for ( cnt; 10 ) {
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| 168 | errno = 0;
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| 169 | disable_interrupts();
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| 170 | len = vfprintf( (FILE *)(os.file$), format, args );
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| 171 | enable_interrupts();
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| 172 | if ( len != EOF || errno != EINTR ) break; // timer interrupt ?
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| 173 | if ( cnt == 9 ) abort( "ofstream fmt EINTR spinning exceeded" );
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| 174 | } // for
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| 175 | if ( len == EOF ) { // error writing ?
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| 176 | abort | IO_MSG "invalid write";
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| 177 | } // if
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| 178 | va_end( args );
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| 179 |
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| 180 | setPrt$( os, true ); // called in output cascade
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| 181 | sepReset$( os ); // reset separator
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| 182 | return len;
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| 183 | } // fmt
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| 184 |
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| 185 | static ofstream soutFile = { (FILE *)stdout };
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| 186 | ofstream & sout = soutFile, & stdout = soutFile;
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| 187 | static ofstream serrFile = { (FILE *)stderr };
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| 188 | ofstream & serr = serrFile, & stderr = serrFile;
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| 189 |
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| 190 | static ofstream lsoutFile = { (FILE *)stdout };
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| 191 | ofstream & lsout = lsoutFile;
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| 192 |
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| 193 | static ofstream exitFile = { (FILE *)stdout };
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| 194 | ofstream & exit = exitFile;
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| 195 | static ofstream abortFile = { (FILE *)stderr };
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| 196 | ofstream & abort = abortFile;
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| 197 |
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| 198 | ofstream & nl( ofstream & os ) {
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| 199 | nl$( os ); // call basic_ostream nl
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| 200 | flush( os );
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| 201 | return os;
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| 202 | } // nl
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| 203 |
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| 204 |
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| 205 | // *********************************** ifstream ***********************************
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| 206 |
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| 207 |
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| 208 | // private
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| 209 | void ?{}( ifstream & is, void * file ) with( is ) {
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| 210 | file$ = file;
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| 211 | nlOnOff$ = false;
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| 212 | } // ?{}
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| 213 |
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| 214 | bool getANL$( ifstream & os ) { return os.nlOnOff$; }
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| 215 | bool setANL$( ifstream & os, bool state ) { bool temp = os.nlOnOff$; os.nlOnOff$ = state; return temp; }
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| 216 |
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| 217 | inline void lock( ifstream & os ) with( os ) { lock( os.lock$ ); }
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| 218 | inline void unlock( ifstream & os ) { unlock( os.lock$ ); }
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| 219 |
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| 220 | // public
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| 221 | void ?{}( ifstream & is ) { is.file$ = 0p; }
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| 222 | void ?{}( ifstream & is, const char name[], const char mode[] ) { open( is, name, mode ); }
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| 223 | void ?{}( ifstream & is, const char name[] ) { open( is, name, "r" ); }
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| 224 | void ^?{}( ifstream & is ) { close( is ); }
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| 225 |
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| 226 | bool fail( ifstream & is ) { return is.file$ == 0p || ferror( (FILE *)(is.file$) ); }
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| 227 | void clear( ifstream & is ) { clearerr( (FILE *)(is.file$) ); }
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| 228 |
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| 229 | void nlOn( ifstream & os ) { os.nlOnOff$ = true; }
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| 230 | void nlOff( ifstream & os ) { os.nlOnOff$ = false; }
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| 231 |
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| 232 | bool eof( ifstream & is ) { return feof( (FILE *)(is.file$) ) != 0; }
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| 233 |
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| 234 | void open( ifstream & is, const char name[], const char mode[] ) {
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| 235 | FILE * file;
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| 236 | for ( cnt; 10 ) {
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| 237 | errno = 0;
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| 238 | file = fopen( name, mode );
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| 239 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ?
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| 240 | if ( cnt == 9 ) abort( "ifstream open EINTR spinning exceeded" );
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| 241 | } // for
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| 242 | if ( file == 0p ) {
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| 243 | throw (open_failure){ is };
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| 244 | // abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno );
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| 245 | } // if
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| 246 | (is){ file }; // initialize
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| 247 | } // open
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| 248 |
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| 249 | void open( ifstream & is, const char name[] ) { open( is, name, "r" ); }
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| 250 |
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| 251 | void close( ifstream & is ) with( is ) {
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| 252 | if ( (FILE *)(file$) == 0p ) return;
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| 253 | if ( (FILE *)(file$) == (FILE *)stdin ) return;
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| 254 |
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| 255 | int ret;
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| 256 | for ( cnt; 10 ) {
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| 257 | errno = 0;
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| 258 | ret = fclose( (FILE *)(file$) );
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| 259 | if ( ret != EOF || errno != EINTR ) break; // timer interrupt ?
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| 260 | if ( cnt == 9 ) abort( "ifstream close EINTR spinning exceeded" );
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| 261 | } // for
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| 262 | if ( ret == EOF ) {
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| 263 | throw (close_failure){ is };
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| 264 | // abort | IO_MSG "close input" | nl | strerror( errno );
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| 265 | } // if
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| 266 | file$ = 0p; // safety after close
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| 267 | } // close
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| 268 |
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| 269 | ifstream & read( ifstream & is, char data[], size_t size ) {
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| 270 | if ( fail( is ) ) {
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| 271 | throw (read_failure){ is };
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| 272 | // abort | IO_MSG "attempt read I/O on failed stream";
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| 273 | } // if
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| 274 |
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| 275 | if ( fread( data, size, 1, (FILE *)(is.file$) ) == 0 ) {
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| 276 | throw (read_failure){ is };
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| 277 | // abort | IO_MSG "read" | nl | strerror( errno );
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| 278 | } // if
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| 279 | return is;
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| 280 | } // read
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| 281 |
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| 282 | ifstream &ungetc( ifstream & is, char c ) {
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| 283 | if ( fail( is ) ) {
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| 284 | abort | IO_MSG "attempt ungetc I/O on failed stream";
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| 285 | } // if
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| 286 |
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| 287 | if ( ungetc( c, (FILE *)(is.file$) ) == EOF ) {
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| 288 | abort | IO_MSG "ungetc" | nl | strerror( errno );
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| 289 | } // if
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| 290 | return is;
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| 291 | } // ungetc
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| 292 |
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| 293 | int fmt( ifstream & is, const char format[], ... ) {
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| 294 | va_list args;
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| 295 | va_start( args, format );
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| 296 |
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| 297 | int nargs;
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| 298 | for () { // no check for EINTR limit waiting for keyboard input
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| 299 | errno = 0;
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| 300 | disable_interrupts();
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| 301 | nargs = vfscanf( (FILE *)(is.file$), format, args );
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| 302 | enable_interrupts();
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| 303 | if ( nargs != EOF || errno != EINTR ) break; // timer interrupt ?
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| 304 | } // for
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| 305 | if ( nargs == EOF ) { // EOF or matching failure ?
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| 306 | if ( ! feof( (FILE *)(is.file$) ) && ferror( (FILE *)(is.file$) ) ) {
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| 307 | abort | IO_MSG "invalid read";
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| 308 | } // if
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| 309 | } // if
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| 310 | va_end( args );
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| 311 | return nargs;
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| 312 | } // fmt
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| 313 |
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| 314 | static ifstream sinFile = { (FILE *)stdin };
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| 315 | ifstream & sin = sinFile, & stdin = sinFile;
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| 316 |
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| 317 |
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| 318 | // *********************************** exceptions ***********************************
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| 319 |
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| 320 |
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| 321 | static vtable(open_failure) open_failure_vt;
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| 322 |
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| 323 | // exception I/O constructors
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| 324 | void ?{}( open_failure & ex, ofstream & ostream ) with( ex ) {
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| 325 | virtual_table = &open_failure_vt;
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| 326 | ostream = &ostream;
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| 327 | tag = 1;
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| 328 | } // ?{}
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| 329 |
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| 330 | void ?{}( open_failure & ex, ifstream & istream ) with( ex ) {
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| 331 | virtual_table = &open_failure_vt;
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| 332 | istream = &istream;
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| 333 | tag = 0;
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| 334 | } // ?{}
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| 335 |
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| 336 |
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| 337 | static vtable(close_failure) close_failure_vt;
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| 338 |
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| 339 | // exception I/O constructors
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| 340 | void ?{}( close_failure & ex, ofstream & ostream ) with( ex ) {
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| 341 | virtual_table = &close_failure_vt;
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| 342 | ostream = &ostream;
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| 343 | tag = 1;
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| 344 | } // ?{}
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| 345 |
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| 346 | void ?{}( close_failure & ex, ifstream & istream ) with( ex ) {
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| 347 | virtual_table = &close_failure_vt;
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| 348 | istream = &istream;
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| 349 | tag = 0;
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| 350 | } // ?{}
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| 351 |
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| 352 |
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| 353 | static vtable(write_failure) write_failure_vt;
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| 354 |
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| 355 | // exception I/O constructors
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| 356 | void ?{}( write_failure & ex, ofstream & ostream ) with( ex ) {
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| 357 | virtual_table = &write_failure_vt;
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| 358 | ostream = &ostream;
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| 359 | tag = 1;
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| 360 | } // ?{}
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| 361 |
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| 362 | void ?{}( write_failure & ex, ifstream & istream ) with( ex ) {
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| 363 | virtual_table = &write_failure_vt;
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| 364 | istream = &istream;
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| 365 | tag = 0;
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| 366 | } // ?{}
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| 367 |
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| 368 |
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| 369 | static vtable(read_failure) read_failure_vt;
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| 370 |
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| 371 | // exception I/O constructors
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| 372 | void ?{}( read_failure & ex, ofstream & ostream ) with( ex ) {
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| 373 | virtual_table = &read_failure_vt;
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| 374 | ostream = &ostream;
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| 375 | tag = 1;
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| 376 | } // ?{}
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| 377 |
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| 378 | void ?{}( read_failure & ex, ifstream & istream ) with( ex ) {
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| 379 | virtual_table = &read_failure_vt;
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| 380 | istream = &istream;
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| 381 | tag = 0;
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| 382 | } // ?{}
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| 383 |
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| 384 | // void throwopen_failure( ofstream & ostream ) {
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| 385 | // open_failure exc = { ostream };
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| 386 | // }
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| 387 |
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| 388 | // void throwopen_failure( ifstream & istream ) {
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| 389 | // open_failure exc = { istream };
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| 390 | // }
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| 391 |
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| 392 | // Local Variables: //
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| 393 | // tab-width: 4 //
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| 394 | // End: //
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