| 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 : Mon Apr 14 20:41:51 2025
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| 13 | // Update Count : 583
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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$) ); }
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| 111 | void clearerr( ofstream & os ) { clearerr( (FILE *)(os.file$) ); }
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| 112 | int flush( ofstream & os ) { return fflush( (FILE *)(os.file$) ); }
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| 113 |
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| 114 | void open( ofstream & os, const char name[], const char mode[] ) {
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| 115 | FILE * file;
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| 116 | for ( cnt; 10 ) {
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| 117 | errno = 0;
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| 118 | file = fopen( name, mode );
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| 119 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ?
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| 120 | if ( cnt == 9 ) abort( "ofstream open EINTR spinning exceeded" );
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| 121 | } // for
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| 122 | if ( file == 0p ) {
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| 123 | throwResume (open_failure){ os };
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| 124 | // abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno );
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| 125 | } // if
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| 126 | (os){ file }; // initialize
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| 127 | } // open
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| 128 |
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| 129 | void open( ofstream & os, const char name[] ) { open( os, name, "w" ); }
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| 130 |
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| 131 | void close( ofstream & os ) with( os ) {
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| 132 | if ( (FILE *)(file$) == 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 *)stderr };
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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$( os ); // call basic_ostream nl
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| 200 | flush( os );
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| 201 | return os;
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| 202 | } // nl
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| 203 |
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| 204 | static basic_ostream_data(ofstream) ofstream_basic_data = {
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| 205 | sepPrt$,
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| 206 | sepReset$,
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| 207 | sepReset$,
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| 208 | sepGetCur$,
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| 209 | sepSetCur$,
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| 210 | getNL$,
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| 211 | setNL$,
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| 212 | getANL$,
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| 213 | setANL$,
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| 214 | getPrt$,
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| 215 | setPrt$,
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| 216 | nlOn,
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| 217 | nlOff,
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| 218 | sep,
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| 219 | nosep,
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| 220 | sepOn,
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| 221 | sepOff,
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| 222 | sepGet,
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| 223 | sepSet,
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| 224 | sepGetTuple,
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| 225 | sepSetTuple,
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| 226 | ends,
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| 227 | fmt,
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| 228 | };
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| 229 |
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| 230 | basic_ostream_data(ofstream) const & basic_ostream_table = ofstream_basic_data;
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| 231 |
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| 232 | static ostream_data(ofstream) ofstream_data;
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| 233 |
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| 234 | // This should be an initializer like for the basic table.
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| 235 | // But, initialization of a structure with an inline structure doesn't work.
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| 236 | __attribute__((constructor(200)))
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| 237 | static void __ofstream_data_init__() {
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| 238 | basic_ostream_data(ofstream) & basic = ofstream_data;
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| 239 | basic.sepPrt$ = sepPrt$;
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| 240 | basic.sepReset$ = (void(*)(ofstream&))sepReset$;
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| 241 | basic.sepReset$ = (void(*)(ofstream&, bool))sepReset$;
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| 242 | basic.sepGetCur$ = sepGetCur$;
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| 243 | basic.sepSetCur$ = sepSetCur$;
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| 244 | basic.getNL$ = getNL$;
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| 245 | basic.setNL$ = setNL$;
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| 246 | basic.getANL$ = getANL$;
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| 247 | basic.setANL$ = setANL$;
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| 248 | basic.getPrt$ = getPrt$;
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| 249 | basic.setPrt$ = setPrt$;
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| 250 | basic.nlOn = nlOn;
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| 251 | basic.nlOff = nlOff;
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| 252 | basic.sep = sep;
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| 253 | basic.nosep = nosep;
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| 254 | basic.sepOn = sepOn;
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| 255 | basic.sepOff = sepOff;
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| 256 | basic.sepGet = sepGet;
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| 257 | basic.sepSet = sepSet;
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| 258 | basic.sepGetTuple = sepGetTuple;
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| 259 | basic.sepSetTuple = sepSetTuple;
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| 260 | basic.ends = ends;
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| 261 | basic.fmt = fmt;
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| 262 | ofstream_data.fail = fail;
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| 263 | ofstream_data.clearerr = clearerr;
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| 264 | ofstream_data.flush = flush;
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| 265 | ofstream_data.open = open;
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| 266 | ofstream_data.close = close;
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| 267 | ofstream_data.write = write;
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| 268 | }
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| 269 |
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| 270 | ostream_data(ofstream) const & ostream_table = ofstream_data;
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| 271 |
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| 272 | // *********************************** ifstream ***********************************
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| 273 |
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| 274 |
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| 275 | // private
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| 276 | void ?{}( ifstream & is, void * file ) with( is ) {
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| 277 | file$ = file;
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| 278 | nlOnOff$ = false; // => skip newlines when reading single characters
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| 279 | } // ?{}
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| 280 |
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| 281 | static basic_istream_data(ifstream) ifstream_basic_data = {
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| 282 | getANL$,
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| 283 | setANL$,
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| 284 | nlOn,
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| 285 | nlOff,
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| 286 | fmt,
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| 287 | ungetc,
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| 288 | eof,
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| 289 | clearerr,
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| 290 | };
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| 291 |
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| 292 | basic_istream_data(ifstream) const & basic_istream_table = ifstream_basic_data;
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| 293 |
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| 294 | static istream_data(ifstream) ifstream_data;
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| 295 |
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| 296 | // This should be an initializer like for the basic table.
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| 297 | // But, initialization of a structure with an inline structure doesn't work.
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| 298 | __attribute__((constructor(200)))
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| 299 | static void __ifstream_data_init__() {
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| 300 | basic_istream_data(ifstream) & basic = ifstream_data;
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| 301 | basic.getANL$ = getANL$;
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| 302 | basic.setANL$ = setANL$;
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| 303 | basic.nlOn = nlOn;
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| 304 | basic.nlOff = nlOff;
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| 305 | basic.fmt = fmt;
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| 306 | basic.ungetc = ungetc;
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| 307 | basic.eof = eof;
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| 308 | basic.clearerr = clearerr;
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| 309 | ifstream_data.fail = fail;
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| 310 | ifstream_data.open = (void(*)(ifstream &, const char *, const char *))open;
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| 311 | ifstream_data.open = (void(*)(ifstream &, const char *))open;
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| 312 | ifstream_data.close = close;
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| 313 | ifstream_data.read = read;
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| 314 | }
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| 315 |
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| 316 | istream_data(ifstream) const & istream_table = ifstream_data;
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| 317 |
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| 318 | bool getANL$( ifstream & os ) { return os.nlOnOff$; }
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| 319 | bool setANL$( ifstream & os, bool state ) { bool temp = os.nlOnOff$; os.nlOnOff$ = state; return temp; }
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| 320 |
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| 321 | inline void lock( ifstream & os ) with( os ) { lock( os.lock$ ); }
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| 322 | inline void unlock( ifstream & os ) { unlock( os.lock$ ); }
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| 323 |
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| 324 | // public
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| 325 | void ?{}( ifstream & is ) { is.file$ = 0p; }
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| 326 | void ?{}( ifstream & is, const char name[], const char mode[] ) { open( is, name, mode ); }
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| 327 | void ?{}( ifstream & is, const char name[] ) { open( is, name, "r" ); }
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| 328 | void ^?{}( ifstream & is ) { close( is ); }
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| 329 |
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| 330 | bool fail( ifstream & is ) { return is.file$ == 0p || ferror( (FILE *)(is.file$) ); }
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| 331 | void clearerr( ifstream & is ) { clearerr( (FILE *)(is.file$) ); }
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| 332 |
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| 333 | void nlOn( ifstream & os ) { os.nlOnOff$ = true; }
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| 334 | void nlOff( ifstream & os ) { os.nlOnOff$ = false; }
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| 335 |
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| 336 | bool eof( ifstream & is ) { return feof( (FILE *)(is.file$) ) != 0; }
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| 337 |
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| 338 | void open( ifstream & is, const char name[], const char mode[] ) {
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| 339 | FILE * file;
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| 340 | for ( cnt; 10 ) {
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| 341 | errno = 0;
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| 342 | file = fopen( name, mode );
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| 343 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ?
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| 344 | if ( cnt == 9 ) abort( "ifstream open EINTR spinning exceeded" );
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| 345 | } // for
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| 346 | if ( file == 0p ) {
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| 347 | throwResume (open_failure){ is };
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| 348 | // abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno );
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| 349 | } // if
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| 350 | (is){ file }; // initialize
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| 351 | } // open
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| 352 |
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| 353 | void open( ifstream & is, const char name[] ) { open( is, name, "r" ); }
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| 354 |
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| 355 | void close( ifstream & is ) with( is ) {
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| 356 | if ( (FILE *)(file$) == 0p ) return;
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| 357 | if ( (FILE *)(file$) == (FILE *)stdin ) return;
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| 358 |
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| 359 | int ret;
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| 360 | for ( cnt; 10 ) {
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| 361 | errno = 0;
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| 362 | ret = fclose( (FILE *)(file$) );
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| 363 | if ( ret != EOF || errno != EINTR ) break; // timer interrupt ?
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| 364 | if ( cnt == 9 ) abort( "ifstream close EINTR spinning exceeded" );
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| 365 | } // for
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| 366 | if ( ret == EOF ) {
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| 367 | throw (close_failure){ is };
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| 368 | // abort | IO_MSG "close input" | nl | strerror( errno );
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| 369 | } // if
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| 370 | file$ = 0p; // safety after close
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| 371 | } // close
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| 372 |
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| 373 | ifstream & read( ifstream & is, char data[], size_t size ) {
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| 374 | if ( fail( is ) ) {
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| 375 | throw (read_failure){ is };
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| 376 | // abort | IO_MSG "attempt read I/O on failed stream";
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| 377 | } // if
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| 378 |
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| 379 | if ( fread( data, size, 1, (FILE *)(is.file$) ) == 0 ) {
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| 380 | throw (read_failure){ is };
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| 381 | // abort | IO_MSG "read" | nl | strerror( errno );
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| 382 | } // if
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| 383 | return is;
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| 384 | } // read
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| 385 |
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| 386 | ifstream &ungetc( char c, ifstream & is ) {
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| 387 | if ( fail( is ) ) {
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| 388 | abort | IO_MSG "attempt ungetc I/O on failed stream";
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| 389 | } // if
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| 390 |
|
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| 391 | if ( ungetc( c, (FILE *)(is.file$) ) == EOF ) {
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| 392 | abort | IO_MSG "ungetc" | nl | strerror( errno );
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| 393 | } // if
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| 394 | return is;
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| 395 | } // ungetc
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| 396 |
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| 397 | int fmt( ifstream & is, const char format[], ... ) {
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| 398 | va_list args;
|
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| 399 | va_start( args, format );
|
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| 400 |
|
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| 401 | int nargs, tmperrno;
|
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| 402 | for () { // no check for EINTR limit waiting for keyboard input
|
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| 403 | disable_interrupts();
|
|---|
| 404 | errno = 0;
|
|---|
| 405 | nargs = vfscanf( (FILE *)(is.file$), format, args );
|
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| 406 | tmperrno = errno;
|
|---|
| 407 | enable_interrupts();
|
|---|
| 408 | if ( nargs != EOF || errno != EINTR ) break; // timer interrupt ?
|
|---|
| 409 | } // for
|
|---|
| 410 | if ( nargs == EOF ) { // EOF or matching failure ?
|
|---|
| 411 | if ( ! feof( (FILE *)(is.file$) ) && ferror( (FILE *)(is.file$) ) ) {
|
|---|
| 412 | abort | IO_MSG "invalid read";
|
|---|
| 413 | } // if
|
|---|
| 414 | } // if
|
|---|
| 415 | if ( tmperrno == ERANGE ) throwResume ExceptionInst( data_range );
|
|---|
| 416 | va_end( args );
|
|---|
| 417 | return nargs;
|
|---|
| 418 | } // fmt
|
|---|
| 419 |
|
|---|
| 420 | static ifstream sinFile = { (FILE *)stdin };
|
|---|
| 421 | ifstream & sin = sinFile, & stdin = sinFile;
|
|---|
| 422 |
|
|---|
| 423 |
|
|---|
| 424 | // *********************************** exceptions ***********************************
|
|---|
| 425 |
|
|---|
| 426 |
|
|---|
| 427 | // exception I/O constructors
|
|---|
| 428 | void ?{}( open_failure & ex, ofstream & ostream ) with( ex ) {
|
|---|
| 429 | virtual_table = &open_failure_vt;
|
|---|
| 430 | ostream = &ostream;
|
|---|
| 431 | tag = 1;
|
|---|
| 432 | } // ?{}
|
|---|
| 433 |
|
|---|
| 434 | void ?{}( open_failure & ex, ifstream & istream ) with( ex ) {
|
|---|
| 435 | virtual_table = &open_failure_vt;
|
|---|
| 436 | istream = &istream;
|
|---|
| 437 | tag = 0;
|
|---|
| 438 | } // ?{}
|
|---|
| 439 |
|
|---|
| 440 |
|
|---|
| 441 | // exception I/O constructors
|
|---|
| 442 | void ?{}( close_failure & ex, ofstream & ostream ) with( ex ) {
|
|---|
| 443 | virtual_table = &close_failure_vt;
|
|---|
| 444 | ostream = &ostream;
|
|---|
| 445 | tag = 1;
|
|---|
| 446 | } // ?{}
|
|---|
| 447 |
|
|---|
| 448 | void ?{}( close_failure & ex, ifstream & istream ) with( ex ) {
|
|---|
| 449 | virtual_table = &close_failure_vt;
|
|---|
| 450 | istream = &istream;
|
|---|
| 451 | tag = 0;
|
|---|
| 452 | } // ?{}
|
|---|
| 453 |
|
|---|
| 454 |
|
|---|
| 455 | // exception I/O constructors
|
|---|
| 456 | void ?{}( write_failure & ex, ofstream & ostream ) with( ex ) {
|
|---|
| 457 | virtual_table = &write_failure_vt;
|
|---|
| 458 | ostream = &ostream;
|
|---|
| 459 | tag = 1;
|
|---|
| 460 | } // ?{}
|
|---|
| 461 |
|
|---|
| 462 | void ?{}( write_failure & ex, ifstream & istream ) with( ex ) {
|
|---|
| 463 | virtual_table = &write_failure_vt;
|
|---|
| 464 | istream = &istream;
|
|---|
| 465 | tag = 0;
|
|---|
| 466 | } // ?{}
|
|---|
| 467 |
|
|---|
| 468 |
|
|---|
| 469 | // exception I/O constructors
|
|---|
| 470 | void ?{}( read_failure & ex, ofstream & ostream ) with( ex ) {
|
|---|
| 471 | virtual_table = &read_failure_vt;
|
|---|
| 472 | ostream = &ostream;
|
|---|
| 473 | tag = 1;
|
|---|
| 474 | } // ?{}
|
|---|
| 475 |
|
|---|
| 476 | void ?{}( read_failure & ex, ifstream & istream ) with( ex ) {
|
|---|
| 477 | virtual_table = &read_failure_vt;
|
|---|
| 478 | istream = &istream;
|
|---|
| 479 | tag = 0;
|
|---|
| 480 | } // ?{}
|
|---|
| 481 |
|
|---|
| 482 | // void throwopen_failure( ofstream & ostream ) {
|
|---|
| 483 | // open_failure exc = { ostream };
|
|---|
| 484 | // }
|
|---|
| 485 |
|
|---|
| 486 | // void throwopen_failure( ifstream & istream ) {
|
|---|
| 487 | // open_failure exc = { istream };
|
|---|
| 488 | // }
|
|---|
| 489 |
|
|---|
| 490 | // Local Variables: //
|
|---|
| 491 | // tab-width: 4 //
|
|---|
| 492 | // End: //
|
|---|
