| 1 | // |
|---|
| 2 | // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo |
|---|
| 3 | // |
|---|
| 4 | // The contents of this file are covered under the licence agreement in the |
|---|
| 5 | // file "LICENCE" distributed with Cforall. |
|---|
| 6 | // |
|---|
| 7 | // fstream.c -- |
|---|
| 8 | // |
|---|
| 9 | // Author : Peter A. Buhr |
|---|
| 10 | // Created On : Wed May 27 17:56:53 2015 |
|---|
| 11 | // Last Modified By : Peter A. Buhr |
|---|
| 12 | // Last Modified On : Sat Apr 9 14:55:54 2022 |
|---|
| 13 | // Update Count : 515 |
|---|
| 14 | // |
|---|
| 15 | |
|---|
| 16 | #include "fstream.hfa" // also includes iostream.hfa |
|---|
| 17 | |
|---|
| 18 | #include <stdio.h> // vfprintf, vfscanf |
|---|
| 19 | #include <stdlib.h> // exit |
|---|
| 20 | #include <stdarg.h> // varargs |
|---|
| 21 | #include <string.h> // strncpy, strerror |
|---|
| 22 | #include <assert.h> |
|---|
| 23 | #include <errno.h> // errno |
|---|
| 24 | |
|---|
| 25 | #pragma GCC visibility push(default) |
|---|
| 26 | |
|---|
| 27 | // *********************************** ofstream *********************************** |
|---|
| 28 | |
|---|
| 29 | |
|---|
| 30 | #define IO_MSG "I/O error: " |
|---|
| 31 | |
|---|
| 32 | // private |
|---|
| 33 | void ?{}( ofstream & os, void * file ) with( os ) { |
|---|
| 34 | file$ = file; |
|---|
| 35 | sepDefault$ = true; |
|---|
| 36 | sepOnOff$ = false; |
|---|
| 37 | nlOnOff$ = true; |
|---|
| 38 | prt$ = false; |
|---|
| 39 | sawNL$ = false; |
|---|
| 40 | sepSetCur$( os, sepGet( os ) ); |
|---|
| 41 | sepSet( os, " " ); |
|---|
| 42 | sepSetTuple( os, ", " ); |
|---|
| 43 | } // ?{} |
|---|
| 44 | |
|---|
| 45 | inline bool sepPrt$( ofstream & os ) { setNL$( os, false ); return os.sepOnOff$; } |
|---|
| 46 | inline void sepReset$( ofstream & os ) { os.sepOnOff$ = os.sepDefault$; } |
|---|
| 47 | inline void sepReset$( ofstream & os, bool reset ) { os.sepDefault$ = reset; os.sepOnOff$ = os.sepDefault$; } |
|---|
| 48 | inline const char * sepGetCur$( ofstream & os ) { return os.sepCur$; } |
|---|
| 49 | inline void sepSetCur$( ofstream & os, const char sepCur[] ) { os.sepCur$ = sepCur; } |
|---|
| 50 | inline bool getNL$( ofstream & os ) { return os.sawNL$; } |
|---|
| 51 | inline void setNL$( ofstream & os, bool state ) { os.sawNL$ = state; } |
|---|
| 52 | inline bool getANL$( ofstream & os ) { return os.nlOnOff$; } |
|---|
| 53 | inline bool getPrt$( ofstream & os ) { return os.prt$; } |
|---|
| 54 | inline void setPrt$( ofstream & os, bool state ) { os.prt$ = state; } |
|---|
| 55 | |
|---|
| 56 | inline void lock( ofstream & os ) with( os ) { lock( os.lock$ ); } |
|---|
| 57 | inline void unlock( ofstream & os ) { unlock( os.lock$ ); } |
|---|
| 58 | |
|---|
| 59 | // public |
|---|
| 60 | void ?{}( ofstream & os ) { os.file$ = 0p; } |
|---|
| 61 | void ?{}( ofstream & os, const char name[], const char mode[] ) { open( os, name, mode ); } |
|---|
| 62 | void ?{}( ofstream & os, const char name[] ) { open( os, name, "w" ); } |
|---|
| 63 | void ^?{}( ofstream & os ) { close( os ); } |
|---|
| 64 | |
|---|
| 65 | void sepOn( ofstream & os ) { os.sepOnOff$ = ! getNL$( os ); } |
|---|
| 66 | void sepOff( ofstream & os ) { os.sepOnOff$ = false; } |
|---|
| 67 | |
|---|
| 68 | bool sepDisable( ofstream & os ) { |
|---|
| 69 | bool temp = os.sepDefault$; |
|---|
| 70 | os.sepDefault$ = false; |
|---|
| 71 | sepReset$( os ); |
|---|
| 72 | return temp; |
|---|
| 73 | } // sepDisable |
|---|
| 74 | |
|---|
| 75 | bool sepEnable( ofstream & os ) { |
|---|
| 76 | bool temp = os.sepDefault$; |
|---|
| 77 | os.sepDefault$ = true; |
|---|
| 78 | if ( os.sepOnOff$ ) sepReset$( os ); // start of line ? |
|---|
| 79 | return temp; |
|---|
| 80 | } // sepEnable |
|---|
| 81 | |
|---|
| 82 | void nlOn( ofstream & os ) { os.nlOnOff$ = true; } |
|---|
| 83 | void nlOff( ofstream & os ) { os.nlOnOff$ = false; } |
|---|
| 84 | |
|---|
| 85 | const char * sepGet( ofstream & os ) { return os.separator$; } |
|---|
| 86 | void sepSet( ofstream & os, const char s[] ) { |
|---|
| 87 | assert( s ); |
|---|
| 88 | strncpy( os.separator$, s, ofstream_sepSize - 1 ); |
|---|
| 89 | os.separator$[ofstream_sepSize - 1] = '\0'; |
|---|
| 90 | } // sepSet |
|---|
| 91 | |
|---|
| 92 | const char * sepGetTuple( ofstream & os ) { return os.tupleSeparator$; } |
|---|
| 93 | void sepSetTuple( ofstream & os, const char s[] ) { |
|---|
| 94 | assert( s ); |
|---|
| 95 | strncpy( os.tupleSeparator$, s, ofstream_sepSize - 1 ); |
|---|
| 96 | os.tupleSeparator$[ofstream_sepSize - 1] = '\0'; |
|---|
| 97 | } // sepSet |
|---|
| 98 | |
|---|
| 99 | void ends( ofstream & os ) { |
|---|
| 100 | if ( getANL$( os ) ) nl( os ); |
|---|
| 101 | else setPrt$( os, false ); // turn off |
|---|
| 102 | if ( &os == &exit ) exit( EXIT_FAILURE ); |
|---|
| 103 | if ( &os == &abort ) abort(); |
|---|
| 104 | } // ends |
|---|
| 105 | |
|---|
| 106 | bool fail( ofstream & os ) { return os.file$ == 0 || ferror( (FILE *)(os.file$) ); } |
|---|
| 107 | void clear( ofstream & os ) { clearerr( (FILE *)(os.file$) ); } |
|---|
| 108 | int flush( ofstream & os ) { return fflush( (FILE *)(os.file$) ); } |
|---|
| 109 | |
|---|
| 110 | void open( ofstream & os, const char name[], const char mode[] ) { |
|---|
| 111 | FILE * file; |
|---|
| 112 | for ( cnt; 10 ) { |
|---|
| 113 | errno = 0; |
|---|
| 114 | file = fopen( name, mode ); |
|---|
| 115 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ? |
|---|
| 116 | if ( cnt == 9 ) abort( "ofstream open EINTR spinning exceeded" ); |
|---|
| 117 | } // for |
|---|
| 118 | if ( file == 0p ) { |
|---|
| 119 | throw (Open_Failure){ os }; |
|---|
| 120 | // abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno ); |
|---|
| 121 | } // if |
|---|
| 122 | (os){ file }; // initialize |
|---|
| 123 | } // open |
|---|
| 124 | |
|---|
| 125 | void open( ofstream & os, const char name[] ) { open( os, name, "w" ); } |
|---|
| 126 | |
|---|
| 127 | void close( ofstream & os ) with( os ) { |
|---|
| 128 | if ( (FILE *)(file$) == 0p ) return; |
|---|
| 129 | if ( (FILE *)(file$) == (FILE *)stdout || (FILE *)(file$) == (FILE *)stderr ) return; |
|---|
| 130 | |
|---|
| 131 | int ret; |
|---|
| 132 | for ( cnt; 10 ) { |
|---|
| 133 | errno = 0; |
|---|
| 134 | ret = fclose( (FILE *)(file$) ); |
|---|
| 135 | if ( ret != EOF || errno != EINTR ) break; // timer interrupt ? |
|---|
| 136 | if ( cnt == 9 ) abort( "ofstream open EINTR spinning exceeded" ); |
|---|
| 137 | } // for |
|---|
| 138 | if ( ret == EOF ) { |
|---|
| 139 | throw (Close_Failure){ os }; |
|---|
| 140 | // abort | IO_MSG "close output" | nl | strerror( errno ); |
|---|
| 141 | } // if |
|---|
| 142 | file$ = 0p; // safety after close |
|---|
| 143 | } // close |
|---|
| 144 | |
|---|
| 145 | ofstream & write( ofstream & os, const char data[], size_t size ) { |
|---|
| 146 | if ( fail( os ) ) { |
|---|
| 147 | throw (Write_Failure){ os }; |
|---|
| 148 | // abort | IO_MSG "attempt write I/O on failed stream"; |
|---|
| 149 | } // if |
|---|
| 150 | |
|---|
| 151 | if ( fwrite( data, 1, size, (FILE *)(os.file$) ) != size ) { |
|---|
| 152 | throw (Write_Failure){ os }; |
|---|
| 153 | // abort | IO_MSG "write" | nl | strerror( errno ); |
|---|
| 154 | } // if |
|---|
| 155 | return os; |
|---|
| 156 | } // write |
|---|
| 157 | |
|---|
| 158 | int fmt( ofstream & os, const char format[], ... ) { |
|---|
| 159 | va_list args; |
|---|
| 160 | va_start( args, format ); |
|---|
| 161 | |
|---|
| 162 | int len; |
|---|
| 163 | for ( cnt; 10 ) { |
|---|
| 164 | errno = 0; |
|---|
| 165 | disable_interrupts(); |
|---|
| 166 | len = vfprintf( (FILE *)(os.file$), format, args ); |
|---|
| 167 | enable_interrupts(); |
|---|
| 168 | if ( len != EOF || errno != EINTR ) break; // timer interrupt ? |
|---|
| 169 | if ( cnt == 9 ) abort( "ofstream fmt EINTR spinning exceeded" ); |
|---|
| 170 | } // for |
|---|
| 171 | if ( len == EOF ) { |
|---|
| 172 | if ( ferror( (FILE *)(os.file$) ) ) { |
|---|
| 173 | abort | IO_MSG "invalid write"; |
|---|
| 174 | } // if |
|---|
| 175 | } // if |
|---|
| 176 | va_end( args ); |
|---|
| 177 | |
|---|
| 178 | setPrt$( os, true ); // called in output cascade |
|---|
| 179 | sepReset$( os ); // reset separator |
|---|
| 180 | return len; |
|---|
| 181 | } // fmt |
|---|
| 182 | |
|---|
| 183 | static ofstream soutFile = { (FILE *)stdout }; |
|---|
| 184 | ofstream & sout = soutFile, & stdout = soutFile; |
|---|
| 185 | static ofstream serrFile = { (FILE *)stderr }; |
|---|
| 186 | ofstream & serr = serrFile, & stderr = serrFile; |
|---|
| 187 | |
|---|
| 188 | static ofstream lsoutFile = { (FILE *)stdout }; |
|---|
| 189 | ofstream & lsout = lsoutFile; |
|---|
| 190 | |
|---|
| 191 | static ofstream exitFile = { (FILE *)stdout }; |
|---|
| 192 | ofstream & exit = exitFile; |
|---|
| 193 | static ofstream abortFile = { (FILE *)stderr }; |
|---|
| 194 | ofstream & abort = abortFile; |
|---|
| 195 | |
|---|
| 196 | ofstream & nl( ofstream & os ) { |
|---|
| 197 | nl$( os ); // call basic_ostream nl |
|---|
| 198 | flush( os ); |
|---|
| 199 | return os; |
|---|
| 200 | } // nl |
|---|
| 201 | |
|---|
| 202 | |
|---|
| 203 | // *********************************** ifstream *********************************** |
|---|
| 204 | |
|---|
| 205 | |
|---|
| 206 | // private |
|---|
| 207 | void ?{}( ifstream & is, void * file ) with( is ) { |
|---|
| 208 | file$ = file; |
|---|
| 209 | nlOnOff$ = false; |
|---|
| 210 | } // ?{} |
|---|
| 211 | |
|---|
| 212 | bool getANL$( ifstream & os ) { return os.nlOnOff$; } |
|---|
| 213 | |
|---|
| 214 | inline void lock( ifstream & os ) with( os ) { lock( os.lock$ ); } |
|---|
| 215 | inline void unlock( ifstream & os ) { unlock( os.lock$ ); } |
|---|
| 216 | |
|---|
| 217 | // public |
|---|
| 218 | void ?{}( ifstream & is ) { is.file$ = 0p; } |
|---|
| 219 | void ?{}( ifstream & is, const char name[], const char mode[] ) { open( is, name, mode ); } |
|---|
| 220 | void ?{}( ifstream & is, const char name[] ) { open( is, name, "r" ); } |
|---|
| 221 | void ^?{}( ifstream & is ) { close( is ); } |
|---|
| 222 | |
|---|
| 223 | bool fail( ifstream & is ) { return is.file$ == 0p || ferror( (FILE *)(is.file$) ); } |
|---|
| 224 | void clear( ifstream & is ) { clearerr( (FILE *)(is.file$) ); } |
|---|
| 225 | |
|---|
| 226 | void nlOn( ifstream & os ) { os.nlOnOff$ = true; } |
|---|
| 227 | void nlOff( ifstream & os ) { os.nlOnOff$ = false; } |
|---|
| 228 | |
|---|
| 229 | void ends( ifstream & is ) {} |
|---|
| 230 | |
|---|
| 231 | bool eof( ifstream & is ) { return feof( (FILE *)(is.file$) ) != 0; } |
|---|
| 232 | |
|---|
| 233 | void open( ifstream & is, const char name[], const char mode[] ) { |
|---|
| 234 | FILE * file; |
|---|
| 235 | for ( cnt; 10 ) { |
|---|
| 236 | errno = 0; |
|---|
| 237 | file = fopen( name, mode ); |
|---|
| 238 | if ( file != 0p || errno != EINTR ) break; // timer interrupt ? |
|---|
| 239 | if ( cnt == 9 ) abort( "ifstream open EINTR spinning exceeded" ); |
|---|
| 240 | } // for |
|---|
| 241 | if ( file == 0p ) { |
|---|
| 242 | throw (Open_Failure){ is }; |
|---|
| 243 | // abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno ); |
|---|
| 244 | } // if |
|---|
| 245 | (is){ file }; // initialize |
|---|
| 246 | } // open |
|---|
| 247 | |
|---|
| 248 | void open( ifstream & is, const char name[] ) { open( is, name, "r" ); } |
|---|
| 249 | |
|---|
| 250 | void close( ifstream & is ) with( is ) { |
|---|
| 251 | if ( (FILE *)(file$) == 0p ) return; |
|---|
| 252 | if ( (FILE *)(file$) == (FILE *)stdin ) return; |
|---|
| 253 | |
|---|
| 254 | int ret; |
|---|
| 255 | for ( cnt; 10 ) { |
|---|
| 256 | errno = 0; |
|---|
| 257 | ret = fclose( (FILE *)(file$) ); |
|---|
| 258 | if ( ret != EOF || errno != EINTR ) break; // timer interrupt ? |
|---|
| 259 | if ( cnt == 9 ) abort( "ifstream close EINTR spinning exceeded" ); |
|---|
| 260 | } // for |
|---|
| 261 | if ( ret == EOF ) { |
|---|
| 262 | throw (Close_Failure){ is }; |
|---|
| 263 | // abort | IO_MSG "close input" | nl | strerror( errno ); |
|---|
| 264 | } // if |
|---|
| 265 | file$ = 0p; // safety after close |
|---|
| 266 | } // close |
|---|
| 267 | |
|---|
| 268 | ifstream & read( ifstream & is, char data[], size_t size ) { |
|---|
| 269 | if ( fail( is ) ) { |
|---|
| 270 | throw (Read_Failure){ is }; |
|---|
| 271 | // abort | IO_MSG "attempt read I/O on failed stream"; |
|---|
| 272 | } // if |
|---|
| 273 | |
|---|
| 274 | if ( fread( data, size, 1, (FILE *)(is.file$) ) == 0 ) { |
|---|
| 275 | throw (Read_Failure){ is }; |
|---|
| 276 | // abort | IO_MSG "read" | nl | strerror( errno ); |
|---|
| 277 | } // if |
|---|
| 278 | return is; |
|---|
| 279 | } // read |
|---|
| 280 | |
|---|
| 281 | ifstream &ungetc( ifstream & is, char c ) { |
|---|
| 282 | if ( fail( is ) ) { |
|---|
| 283 | abort | IO_MSG "attempt ungetc I/O on failed stream"; |
|---|
| 284 | } // if |
|---|
| 285 | |
|---|
| 286 | if ( ungetc( c, (FILE *)(is.file$) ) == EOF ) { |
|---|
| 287 | abort | IO_MSG "ungetc" | nl | strerror( errno ); |
|---|
| 288 | } // if |
|---|
| 289 | return is; |
|---|
| 290 | } // ungetc |
|---|
| 291 | |
|---|
| 292 | int fmt( ifstream & is, const char format[], ... ) { |
|---|
| 293 | va_list args; |
|---|
| 294 | va_start( args, format ); |
|---|
| 295 | |
|---|
| 296 | int len; |
|---|
| 297 | for () { // no check for EINTR limit waiting for keyboard input |
|---|
| 298 | errno = 0; |
|---|
| 299 | disable_interrupts(); |
|---|
| 300 | len = vfscanf( (FILE *)(is.file$), format, args ); |
|---|
| 301 | enable_interrupts(); |
|---|
| 302 | if ( len != EOF || errno != EINTR ) break; // timer interrupt ? |
|---|
| 303 | } // for |
|---|
| 304 | if ( len == EOF ) { |
|---|
| 305 | if ( ferror( (FILE *)(is.file$) ) ) { |
|---|
| 306 | abort | IO_MSG "invalid read"; |
|---|
| 307 | } // if |
|---|
| 308 | } // if |
|---|
| 309 | va_end( args ); |
|---|
| 310 | return len; |
|---|
| 311 | } // fmt |
|---|
| 312 | |
|---|
| 313 | static ifstream sinFile = { (FILE *)stdin }; |
|---|
| 314 | ifstream & sin = sinFile, & stdin = sinFile; |
|---|
| 315 | |
|---|
| 316 | |
|---|
| 317 | // *********************************** exceptions *********************************** |
|---|
| 318 | |
|---|
| 319 | |
|---|
| 320 | static vtable(Open_Failure) Open_Failure_vt; |
|---|
| 321 | |
|---|
| 322 | // exception I/O constructors |
|---|
| 323 | void ?{}( Open_Failure & ex, ofstream & ostream ) with(ex) { |
|---|
| 324 | virtual_table = &Open_Failure_vt; |
|---|
| 325 | ostream = &ostream; |
|---|
| 326 | tag = 1; |
|---|
| 327 | } // ?{} |
|---|
| 328 | |
|---|
| 329 | void ?{}( Open_Failure & ex, ifstream & istream ) with(ex) { |
|---|
| 330 | virtual_table = &Open_Failure_vt; |
|---|
| 331 | istream = &istream; |
|---|
| 332 | tag = 0; |
|---|
| 333 | } // ?{} |
|---|
| 334 | |
|---|
| 335 | |
|---|
| 336 | static vtable(Close_Failure) Close_Failure_vt; |
|---|
| 337 | |
|---|
| 338 | // exception I/O constructors |
|---|
| 339 | void ?{}( Close_Failure & ex, ofstream & ostream ) with(ex) { |
|---|
| 340 | virtual_table = &Close_Failure_vt; |
|---|
| 341 | ostream = &ostream; |
|---|
| 342 | tag = 1; |
|---|
| 343 | } // ?{} |
|---|
| 344 | |
|---|
| 345 | void ?{}( Close_Failure & ex, ifstream & istream ) with(ex) { |
|---|
| 346 | virtual_table = &Close_Failure_vt; |
|---|
| 347 | istream = &istream; |
|---|
| 348 | tag = 0; |
|---|
| 349 | } // ?{} |
|---|
| 350 | |
|---|
| 351 | |
|---|
| 352 | static vtable(Write_Failure) Write_Failure_vt; |
|---|
| 353 | |
|---|
| 354 | // exception I/O constructors |
|---|
| 355 | void ?{}( Write_Failure & ex, ofstream & ostream ) with(ex) { |
|---|
| 356 | virtual_table = &Write_Failure_vt; |
|---|
| 357 | ostream = &ostream; |
|---|
| 358 | tag = 1; |
|---|
| 359 | } // ?{} |
|---|
| 360 | |
|---|
| 361 | void ?{}( Write_Failure & ex, ifstream & istream ) with(ex) { |
|---|
| 362 | virtual_table = &Write_Failure_vt; |
|---|
| 363 | istream = &istream; |
|---|
| 364 | tag = 0; |
|---|
| 365 | } // ?{} |
|---|
| 366 | |
|---|
| 367 | |
|---|
| 368 | static vtable(Read_Failure) Read_Failure_vt; |
|---|
| 369 | |
|---|
| 370 | // exception I/O constructors |
|---|
| 371 | void ?{}( Read_Failure & ex, ofstream & ostream ) with(ex) { |
|---|
| 372 | virtual_table = &Read_Failure_vt; |
|---|
| 373 | ostream = &ostream; |
|---|
| 374 | tag = 1; |
|---|
| 375 | } // ?{} |
|---|
| 376 | |
|---|
| 377 | void ?{}( Read_Failure & ex, ifstream & istream ) with(ex) { |
|---|
| 378 | virtual_table = &Read_Failure_vt; |
|---|
| 379 | istream = &istream; |
|---|
| 380 | tag = 0; |
|---|
| 381 | } // ?{} |
|---|
| 382 | |
|---|
| 383 | // void throwOpen_Failure( ofstream & ostream ) { |
|---|
| 384 | // Open_Failure exc = { ostream }; |
|---|
| 385 | // } |
|---|
| 386 | |
|---|
| 387 | // void throwOpen_Failure( ifstream & istream ) { |
|---|
| 388 | // Open_Failure exc = { istream }; |
|---|
| 389 | // } |
|---|
| 390 | |
|---|
| 391 | // Local Variables: // |
|---|
| 392 | // tab-width: 4 // |
|---|
| 393 | // End: // |
|---|
