source: libcfa/src/fstream.cfa@ c993b15

ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation new-ast-unique-expr pthread-emulation qualifiedEnum
Last change on this file since c993b15 was f451177, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago

remember basic_ostream nl and then override it using the basic_ostream version

  • Property mode set to 100644
File size: 9.3 KB
Line 
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 : Tue Apr 27 22:08:57 2021
13// Update Count : 442
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// *********************************** ofstream ***********************************
26
27
28#define IO_MSG "I/O error: "
29
30void ?{}( ofstream & os, void * file ) {
31 os.file$ = file;
32 os.sepDefault$ = true;
33 os.sepOnOff$ = false;
34 os.nlOnOff$ = true;
35 os.prt$ = false;
36 os.sawNL$ = false;
37 os.acquired$ = false;
38 sepSetCur$( os, sepGet( os ) );
39 sepSet( os, " " );
40 sepSetTuple( os, ", " );
41} // ?{}
42
43// private
44bool sepPrt$( ofstream & os ) { setNL$( os, false ); return os.sepOnOff$; }
45void sepReset$( ofstream & os ) { os.sepOnOff$ = os.sepDefault$; }
46void sepReset$( ofstream & os, bool reset ) { os.sepDefault$ = reset; os.sepOnOff$ = os.sepDefault$; }
47const char * sepGetCur$( ofstream & os ) { return os.sepCur$; }
48void sepSetCur$( ofstream & os, const char sepCur[] ) { os.sepCur$ = sepCur; }
49bool getNL$( ofstream & os ) { return os.sawNL$; }
50void setNL$( ofstream & os, bool state ) { os.sawNL$ = state; }
51bool getANL$( ofstream & os ) { return os.nlOnOff$; }
52bool getPrt$( ofstream & os ) { return os.prt$; }
53void setPrt$( ofstream & os, bool state ) { os.prt$ = state; }
54
55// public
56void ?{}( ofstream & os ) { os.file$ = 0p; }
57
58void ?{}( ofstream & os, const char name[], const char mode[] ) {
59 open( os, name, mode );
60} // ?{}
61
62void ?{}( ofstream & os, const char name[] ) {
63 open( os, name, "w" );
64} // ?{}
65
66void ^?{}( ofstream & os ) {
67 close( os );
68} // ^?{}
69
70void sepOn( ofstream & os ) { os.sepOnOff$ = ! getNL$( os ); }
71void sepOff( ofstream & os ) { os.sepOnOff$ = false; }
72
73bool sepDisable( ofstream & os ) {
74 bool temp = os.sepDefault$;
75 os.sepDefault$ = false;
76 sepReset$( os );
77 return temp;
78} // sepDisable
79
80bool sepEnable( ofstream & os ) {
81 bool temp = os.sepDefault$;
82 os.sepDefault$ = true;
83 if ( os.sepOnOff$ ) sepReset$( os ); // start of line ?
84 return temp;
85} // sepEnable
86
87void nlOn( ofstream & os ) { os.nlOnOff$ = true; }
88void nlOff( ofstream & os ) { os.nlOnOff$ = false; }
89
90const char * sepGet( ofstream & os ) { return os.separator$; }
91void sepSet( ofstream & os, const char s[] ) {
92 assert( s );
93 strncpy( os.separator$, s, ofstream_sepSize - 1 );
94 os.separator$[ofstream_sepSize - 1] = '\0';
95} // sepSet
96
97const char * sepGetTuple( ofstream & os ) { return os.tupleSeparator$; }
98void sepSetTuple( ofstream & os, const char s[] ) {
99 assert( s );
100 strncpy( os.tupleSeparator$, s, ofstream_sepSize - 1 );
101 os.tupleSeparator$[ofstream_sepSize - 1] = '\0';
102} // sepSet
103
104void ends( ofstream & os ) {
105 if ( getANL$( os ) ) nl( os );
106 else setPrt$( os, false ); // turn off
107 if ( &os == &exit ) exit( EXIT_FAILURE );
108 if ( &os == &abort ) abort();
109 if ( os.acquired$ ) { os.acquired$ = false; release( os ); }
110} // ends
111
112bool fail( ofstream & os ) {
113 return os.file$ == 0 || ferror( (FILE *)(os.file$) );
114} // fail
115
116int flush( ofstream & os ) {
117 return fflush( (FILE *)(os.file$) );
118} // flush
119
120void open( ofstream & os, const char name[], const char mode[] ) {
121 FILE * file = fopen( name, mode );
122 #ifdef __CFA_DEBUG__
123 if ( file == 0p ) {
124 throw (Open_Failure){ os };
125 // abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno );
126 } // if
127 #endif // __CFA_DEBUG__
128 (os){ file };
129} // open
130
131void open( ofstream & os, const char name[] ) {
132 open( os, name, "w" );
133} // open
134
135void close( ofstream & os ) {
136 if ( (FILE *)(os.file$) == 0p ) return;
137 if ( (FILE *)(os.file$) == (FILE *)stdout || (FILE *)(os.file$) == (FILE *)stderr ) return;
138
139 if ( fclose( (FILE *)(os.file$) ) == EOF ) {
140 abort | IO_MSG "close output" | nl | strerror( errno );
141 } // if
142 os.file$ = 0p;
143} // close
144
145ofstream & write( ofstream & os, const char data[], size_t size ) {
146 if ( fail( os ) ) {
147 abort | IO_MSG "attempt write I/O on failed stream";
148 } // if
149
150 if ( fwrite( data, 1, size, (FILE *)(os.file$) ) != size ) {
151 abort | IO_MSG "write" | nl | strerror( errno );
152 } // if
153 return os;
154} // write
155
156int fmt( ofstream & os, const char format[], ... ) {
157 va_list args;
158 va_start( args, format );
159 int len = vfprintf( (FILE *)(os.file$), format, args );
160 if ( len == EOF ) {
161 if ( ferror( (FILE *)(os.file$) ) ) {
162 abort | IO_MSG "invalid write";
163 } // if
164 } // if
165 va_end( args );
166
167 setPrt$( os, true ); // called in output cascade
168 sepReset$( os ); // reset separator
169 return len;
170} // fmt
171
172inline void acquire( ofstream & os ) {
173 lock( os.lock$ );
174 if ( ! os.acquired$ ) os.acquired$ = true;
175 else unlock( os.lock$ );
176} // acquire
177
178inline void release( ofstream & os ) {
179 unlock( os.lock$ );
180} // release
181
182void ?{}( osacquire & acq, ofstream & os ) { &acq.os = &os; lock( os.lock$ ); }
183void ^?{}( osacquire & acq ) { release( acq.os ); }
184
185static ofstream soutFile = { (FILE *)stdout };
186ofstream & sout = soutFile, & stdout = soutFile;
187static ofstream serrFile = { (FILE *)stderr };
188ofstream & serr = serrFile, & stderr = serrFile;
189
190static ofstream lsoutFile = { (FILE *)stdout };
191ofstream & lsout = lsoutFile;
192
193static ofstream exitFile = { (FILE *)stdout };
194ofstream & exit = exitFile;
195static ofstream abortFile = { (FILE *)stderr };
196ofstream & abort = abortFile;
197
198ofstream & nl( ofstream & os ) {
199 nl$( os ); // call basic_ostream nl
200 flush( os );
201 return os;
202 // (ofstream &)(os | '\n');
203 // setPrt$( os, false ); // turn off
204 // setNL$( os, true );
205 // flush( os );
206 // return sepOff( os ); // prepare for next line
207} // nl
208
209// *********************************** ifstream ***********************************
210
211
212// private
213void ?{}( ifstream & is, void * file ) {
214 is.file$ = file;
215 is.nlOnOff$ = false;
216 is.acquired$ = false;
217} // ?{}
218
219// public
220void ?{}( ifstream & is ) { is.file$ = 0p; }
221
222void ?{}( ifstream & is, const char name[], const char mode[] ) {
223 open( is, name, mode );
224} // ?{}
225
226void ?{}( ifstream & is, const char name[] ) {
227 open( is, name, "r" );
228} // ?{}
229
230void ^?{}( ifstream & is ) {
231 close( is );
232} // ^?{}
233
234void nlOn( ifstream & os ) { os.nlOnOff$ = true; }
235void nlOff( ifstream & os ) { os.nlOnOff$ = false; }
236bool getANL( ifstream & os ) { return os.nlOnOff$; }
237
238bool fail( ifstream & is ) {
239 return is.file$ == 0p || ferror( (FILE *)(is.file$) );
240} // fail
241
242void ends( ifstream & is ) {
243 if ( is.acquired$ ) { is.acquired$ = false; release( is ); }
244} // ends
245
246int eof( ifstream & is ) {
247 return feof( (FILE *)(is.file$) );
248} // eof
249
250void open( ifstream & is, const char name[], const char mode[] ) {
251 FILE * file = fopen( name, mode );
252 #ifdef __CFA_DEBUG__
253 if ( file == 0p ) {
254 throw (Open_Failure){ is };
255 // abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno );
256 } // if
257 #endif // __CFA_DEBUG__
258 is.file$ = file;
259} // open
260
261void open( ifstream & is, const char name[] ) {
262 open( is, name, "r" );
263} // open
264
265void close( ifstream & is ) {
266 if ( (FILE *)(is.file$) == 0p ) return;
267 if ( (FILE *)(is.file$) == (FILE *)stdin ) return;
268
269 if ( fclose( (FILE *)(is.file$) ) == EOF ) {
270 abort | IO_MSG "close input" | nl | strerror( errno );
271 } // if
272 is.file$ = 0p;
273} // close
274
275ifstream & read( ifstream & is, char * data, size_t size ) {
276 if ( fail( is ) ) {
277 abort | IO_MSG "attempt read I/O on failed stream";
278 } // if
279
280 if ( fread( data, size, 1, (FILE *)(is.file$) ) == 0 ) {
281 abort | IO_MSG "read" | nl | strerror( errno );
282 } // if
283 return is;
284} // read
285
286ifstream &ungetc( ifstream & is, char c ) {
287 if ( fail( is ) ) {
288 abort | IO_MSG "attempt ungetc I/O on failed stream";
289 } // if
290
291 if ( ungetc( c, (FILE *)(is.file$) ) == EOF ) {
292 abort | IO_MSG "ungetc" | nl | strerror( errno );
293 } // if
294 return is;
295} // ungetc
296
297int fmt( ifstream & is, const char format[], ... ) {
298 va_list args;
299
300 va_start( args, format );
301 int len = vfscanf( (FILE *)(is.file$), format, args );
302 if ( len == EOF ) {
303 if ( ferror( (FILE *)(is.file$) ) ) {
304 abort | IO_MSG "invalid read";
305 } // if
306 } // if
307 va_end( args );
308 return len;
309} // fmt
310
311inline void acquire( ifstream & is ) {
312 lock( is.lock$ );
313 if ( ! is.acquired$ ) is.acquired$ = true;
314 else unlock( is.lock$ );
315} // acquire
316
317inline void release( ifstream & is ) {
318 unlock( is.lock$ );
319} // release
320
321void ?{}( isacquire & acq, ifstream & is ) { &acq.is = &is; lock( is.lock$ ); }
322void ^?{}( isacquire & acq ) { release( acq.is ); }
323
324static ifstream sinFile = { (FILE *)stdin };
325ifstream & sin = sinFile, & stdin = sinFile;
326
327
328// *********************************** exceptions ***********************************
329
330
331EHM_VIRTUAL_TABLE(Open_Failure, Open_Failure_main_table);
332void ?{}( Open_Failure & this, ofstream & ostream ) {
333 this.virtual_table = &Open_Failure_main_table;
334 this.ostream = &ostream;
335 this.tag = 1;
336}
337void ?{}( Open_Failure & this, ifstream & istream ) {
338 this.virtual_table = &Open_Failure_main_table;
339 this.istream = &istream;
340 this.tag = 0;
341}
342void throwOpen_Failure( ofstream & ostream ) {
343 Open_Failure exc = { ostream };
344}
345void throwOpen_Failure( ifstream & istream ) {
346 Open_Failure exc = { istream };
347}
348
349// Local Variables: //
350// tab-width: 4 //
351// End: //
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