37 |
|
|
38 |
|
static char *ambfname = NULL; /* ambient file name */ |
39 |
|
static FILE *ambfp = NULL; /* ambient file pointer */ |
40 |
+ |
static int nunflshed = 0; /* number of unflushed ambient values */ |
41 |
|
|
42 |
|
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
43 |
|
|
46 |
|
#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
47 |
|
|
48 |
|
extern long ftell(), lseek(); |
49 |
< |
static int initambfile(), avsave(), avinsert(), ambsync(); |
49 |
> |
static int initambfile(), avsave(), avinsert(); |
50 |
|
|
51 |
|
|
52 |
|
setambres(ar) /* set ambient resolution */ |
75 |
|
/* init ambient limits */ |
76 |
|
setambres(ambres); |
77 |
|
/* open ambient file */ |
78 |
< |
if ((ambfname = afile) != NULL) |
78 |
> |
if ((ambfname = afile) != NULL) { |
79 |
|
if ((ambfp = fopen(afile, "r+")) != NULL) { |
80 |
|
initambfile(0); |
81 |
|
headlen = ftell(ambfp); |
91 |
|
afile); |
92 |
|
error(SYSTEM, errmsg); |
93 |
|
} |
94 |
+ |
nunflshed++; /* lie */ |
95 |
+ |
ambsync(); |
96 |
+ |
} |
97 |
|
} |
98 |
|
|
99 |
|
|
325 |
|
fputformat(AMBFMT, ambfp); |
326 |
|
putc('\n', ambfp); |
327 |
|
putambmagic(ambfp); |
328 |
< |
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
329 |
< |
error(USER, "bad ambient file"); |
330 |
< |
ambsync(); |
328 |
> |
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) { |
329 |
> |
sprintf(errmsg, "bad ambient file \"%s\"", ambfname); |
330 |
> |
error(USER, errmsg); |
331 |
> |
} |
332 |
|
} |
333 |
|
|
334 |
|
|
336 |
|
avsave(av) /* insert and save an ambient value */ |
337 |
|
AMBVAL *av; |
338 |
|
{ |
334 |
– |
static int nunflshed = 0; |
335 |
– |
|
339 |
|
avinsert(av, &atrunk, thescene.cuorg, thescene.cusize); |
340 |
|
if (ambfp == NULL) |
341 |
|
return; |
342 |
|
if (writambval(av, ambfp) < 0) |
343 |
|
goto writerr; |
344 |
< |
if (++nunflshed >= AMBFLUSH) { |
344 |
> |
if (++nunflshed >= AMBFLUSH) |
345 |
|
if (ambsync() == EOF) |
346 |
|
goto writerr; |
344 |
– |
nunflshed = 0; |
345 |
– |
} |
347 |
|
return; |
348 |
|
writerr: |
349 |
< |
error(SYSTEM, "error writing ambient file"); |
349 |
> |
sprintf(errmsg, "error writing ambient file \"%s\"", ambfname); |
350 |
> |
error(SYSTEM, errmsg); |
351 |
|
} |
352 |
|
|
353 |
|
|
390 |
|
|
391 |
|
#ifdef NIX |
392 |
|
|
393 |
< |
static |
393 |
> |
int |
394 |
|
ambsync() /* flush ambient file */ |
395 |
|
{ |
396 |
+ |
if (nunflshed == 0) |
397 |
+ |
return(0); |
398 |
+ |
nunflshed = 0; |
399 |
|
return(fflush(ambfp)); |
400 |
|
} |
401 |
|
|
402 |
|
#else |
403 |
|
|
404 |
< |
static |
404 |
> |
int |
405 |
|
ambsync() /* synchronize ambient file */ |
406 |
|
{ |
407 |
|
static FILE *ambinp = NULL; |
410 |
|
long flen; |
411 |
|
AMBVAL avs; |
412 |
|
register int n; |
413 |
+ |
|
414 |
+ |
if (nunflshed == 0) |
415 |
+ |
return(0); |
416 |
|
/* gain exclusive access */ |
417 |
|
fls.l_type = F_WRLCK; |
418 |
|
fls.l_whence = 0; |
446 |
|
lastpos = lseek(fileno(ambfp), 0L, 1); |
447 |
|
fls.l_type = F_UNLCK; /* release file */ |
448 |
|
fcntl(fileno(ambfp), F_SETLKW, &fls); |
449 |
+ |
nunflshed = 0; |
450 |
|
return(n); |
451 |
|
} |
452 |
|
|