1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: eplus_adduvf.c,v 2.5 2014/02/11 21:17:29 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Add User View Factors to EnergyPlus Input Data File |
6 |
* |
7 |
* G.Ward for LBNL |
8 |
*/ |
9 |
|
10 |
#include <stdlib.h> |
11 |
#include "rtio.h" |
12 |
#include "rtmath.h" |
13 |
#include "random.h" |
14 |
#include "eplus_idf.h" |
15 |
#include "triangulate.h" |
16 |
#include "rtprocess.h" |
17 |
|
18 |
#ifndef NSAMPLES |
19 |
#define NSAMPLES 80000 /* number of samples to use */ |
20 |
#endif |
21 |
|
22 |
char *progname; /* global argv[0] */ |
23 |
|
24 |
char temp_octree[128]; /* temporary octree */ |
25 |
|
26 |
const char UVF_PNAME[] = |
27 |
"ZoneProperty:UserViewFactor:bySurfaceName"; |
28 |
|
29 |
const char ADD_HEADER[] = |
30 |
"\n!+++ User View Factors computed by Radiance +++!\n\n"; |
31 |
|
32 |
#define NAME_FLD 1 /* name field always first? */ |
33 |
|
34 |
typedef struct { |
35 |
const char *pname; /* parameter type name */ |
36 |
short zone_fld; /* zone field index */ |
37 |
short vert_fld; /* vertex field index */ |
38 |
} SURF_PTYPE; /* surface type we're interested in */ |
39 |
|
40 |
const SURF_PTYPE surf_type[] = { |
41 |
{"BuildingSurface:Detailed", 4, 10}, |
42 |
{"Floor:Detailed", 3, 9}, |
43 |
{"RoofCeiling:Detailed", 3, 9}, |
44 |
{"Wall:Detailed", 3, 9}, |
45 |
{NULL} |
46 |
}; |
47 |
|
48 |
typedef struct s_zone { |
49 |
const char *zname; /* zone name */ |
50 |
struct s_zone *next; /* next zone in list */ |
51 |
int nsurf; /* surface count */ |
52 |
IDF_PARAMETER *pfirst; /* first matching parameter */ |
53 |
IDF_PARAMETER *plast; /* last matching parameter */ |
54 |
} ZONE; /* a list of collected zone surfaces */ |
55 |
|
56 |
ZONE *zone_list = NULL; /* our list of zones */ |
57 |
|
58 |
IDF_LOADED *our_idf = NULL; /* loaded/modified IDF */ |
59 |
|
60 |
/* Create a new zone and push to top of our list */ |
61 |
static ZONE * |
62 |
new_zone(const char *zname, IDF_PARAMETER *param) |
63 |
{ |
64 |
ZONE *znew = (ZONE *)malloc(sizeof(ZONE)); |
65 |
|
66 |
if (znew == NULL) |
67 |
return(NULL); |
68 |
znew->zname = zname; /* assumes static */ |
69 |
znew->next = zone_list; |
70 |
znew->pfirst = znew->plast = param; |
71 |
znew->nsurf = 1; |
72 |
return(zone_list = znew); |
73 |
} |
74 |
|
75 |
/* Add the detailed surface (polygon) to the named zone */ |
76 |
static ZONE * |
77 |
add2zone(IDF_PARAMETER *param, const char *zname) |
78 |
{ |
79 |
ZONE *zptr; |
80 |
|
81 |
for (zptr = zone_list; zptr != NULL; zptr = zptr->next) |
82 |
if (!strcmp(zptr->zname, zname)) |
83 |
break; |
84 |
if (zptr == NULL) |
85 |
return(new_zone(zname, param)); |
86 |
/* keep surfaces together */ |
87 |
if (!idf_movparam(our_idf, param, zptr->plast)) |
88 |
return(NULL); |
89 |
zptr->plast = param; |
90 |
zptr->nsurf++; |
91 |
return(zptr); |
92 |
} |
93 |
|
94 |
/* Return field for vertices in the given parameter */ |
95 |
static IDF_FIELD * |
96 |
get_vlist(IDF_PARAMETER *param, const char *zname) |
97 |
{ |
98 |
int i = 0; |
99 |
IDF_FIELD *fptr; |
100 |
/* check for surface type */ |
101 |
while (strcmp(surf_type[i].pname, param->pname)) |
102 |
if (surf_type[++i].pname == NULL) |
103 |
return(NULL); |
104 |
|
105 |
if (zname != NULL) { /* matches specified zone? */ |
106 |
fptr = idf_getfield(param, surf_type[i].zone_fld); |
107 |
if (fptr == NULL || strcmp(fptr->val, zname)) |
108 |
return(NULL); |
109 |
} |
110 |
/* return field for #verts */ |
111 |
return(idf_getfield(param, surf_type[i].vert_fld)); |
112 |
} |
113 |
|
114 |
/* Convert surface to Radiance with modifier based on unique name */ |
115 |
static int |
116 |
rad_surface(IDF_PARAMETER *param, FILE *ofp) |
117 |
{ |
118 |
const char *sname = idf_getfield(param,NAME_FLD)->val; |
119 |
IDF_FIELD *fptr = get_vlist(param, NULL); |
120 |
int nvert, i; |
121 |
|
122 |
if (fptr == NULL || (nvert = atoi(fptr->val)) < 3) { |
123 |
fprintf(stderr, "%s: bad surface '%s'\n", progname, sname); |
124 |
return(0); |
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} |
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fprintf(ofp, "\nvoid glow '%s'\n0\n0\n4 1 1 1 0\n", sname); |
127 |
fprintf(ofp, "\n'%s' polygon 's_%s'\n0\n0\n%d\n", sname, sname, 3*nvert); |
128 |
while (nvert--) { |
129 |
for (i = 3; i--; ) { |
130 |
fptr = fptr->next; |
131 |
if (fptr == NULL || !isflt(fptr->val)) { |
132 |
fprintf(stderr, |
133 |
"%s: missing/bad vertex for %s '%s'\n", |
134 |
progname, param->pname, sname); |
135 |
return(0); |
136 |
} |
137 |
fputc('\t', ofp); |
138 |
fputs(fptr->val, ofp); |
139 |
} |
140 |
fputc('\n', ofp); |
141 |
} |
142 |
return(!ferror(ofp)); |
143 |
} |
144 |
|
145 |
/* Start rcontrib process */ |
146 |
static int |
147 |
start_rcontrib(SUBPROC *pd, ZONE *zp) |
148 |
{ |
149 |
#define BASE_AC 5 |
150 |
static char *base_av[BASE_AC] = { |
151 |
"rcontrib", "-ff", "-h", "-x", "1" |
152 |
}; |
153 |
char cbuf[300]; |
154 |
char **av; |
155 |
FILE *ofp; |
156 |
IDF_PARAMETER *pptr; |
157 |
int i, n; |
158 |
/* start oconv command */ |
159 |
sprintf(cbuf, "oconv - > '%s'", temp_octree); |
160 |
if ((ofp = popen(cbuf, "w")) == NULL) { |
161 |
fputs(progname, stderr); |
162 |
fputs(": cannot open oconv process\n", stderr); |
163 |
return(0); |
164 |
} |
165 |
/* allocate argument list */ |
166 |
av = (char **)malloc(sizeof(char *)*(BASE_AC+4+2*zp->nsurf)); |
167 |
if (av == NULL) |
168 |
return(0); |
169 |
for (i = 0; i < BASE_AC; i++) |
170 |
av[i] = base_av[i]; |
171 |
sprintf(cbuf, "%d", NSAMPLES); |
172 |
av[i++] = "-c"; |
173 |
av[i++] = cbuf; /* add modifier arguments */ |
174 |
for (n = zp->nsurf, pptr = zp->pfirst; n--; pptr = pptr->dnext) { |
175 |
IDF_FIELD *fptr = idf_getfield(pptr,NAME_FLD); |
176 |
if (fptr == NULL || !fptr->val[0]) { |
177 |
fputs(progname, stderr); |
178 |
fputs(": missing name for surface parameter\n", stderr); |
179 |
return(0); |
180 |
} |
181 |
if (!rad_surface(pptr, ofp)) /* add surface to octree */ |
182 |
return(0); |
183 |
av[i++] = "-m"; |
184 |
av[i++] = fptr->val; |
185 |
} |
186 |
if (pclose(ofp) != 0) { /* finish oconv */ |
187 |
fputs(progname, stderr); |
188 |
fputs(": error running oconv process\n", stderr); |
189 |
return(0); |
190 |
} |
191 |
av[i++] = temp_octree; /* add final octree argument */ |
192 |
av[i] = NULL; |
193 |
if (!open_process(pd, av)) { /* start process */ |
194 |
fputs(progname, stderr); |
195 |
fputs(": cannot start rcontrib process\n", stderr); |
196 |
return(0); |
197 |
} |
198 |
free(av); /* all done -- clean up */ |
199 |
return(1); |
200 |
#undef BASE_AC |
201 |
} |
202 |
|
203 |
typedef struct { |
204 |
FVECT sdir[3]; /* XYZ unit sampling vectors */ |
205 |
double poff; /* Z-offset for plane of polygon */ |
206 |
double area_left; /* area left to sample */ |
207 |
int samp_left; /* remaining samples */ |
208 |
int wd; /* output file descriptor */ |
209 |
} POLYSAMP; /* structure for polygon sampling */ |
210 |
|
211 |
/* Initialize polygon sampling */ |
212 |
static Vert2_list * |
213 |
init_poly(POLYSAMP *ps, IDF_FIELD *f0, int nv) |
214 |
{ |
215 |
IDF_FIELD *fptr = f0; |
216 |
int i, j; |
217 |
FVECT *vl3, e1, e2, vc; |
218 |
Vert2_list *vl2 = polyAlloc(nv); |
219 |
|
220 |
if (vl2 == NULL) |
221 |
return(NULL); |
222 |
vl2->p = ps; |
223 |
/* get 3-D vertices */ |
224 |
vl3 = (FVECT *)malloc(sizeof(FVECT)*nv); |
225 |
if (vl3 == NULL) |
226 |
return(NULL); |
227 |
for (i = nv; i--; ) /* reverse vertex ordering */ |
228 |
for (j = 0; j < 3; j++) { |
229 |
if (fptr == NULL) { |
230 |
fputs(progname, stderr); |
231 |
fputs(": missing vertex in init_poly()\n", stderr); |
232 |
return(NULL); |
233 |
} |
234 |
vl3[i][j] = atof(fptr->val); |
235 |
fptr = fptr->next; |
236 |
} |
237 |
/* compute area and normal */ |
238 |
ps->sdir[2][0] = ps->sdir[2][1] = ps->sdir[2][2] = 0; |
239 |
VSUB(e1, vl3[1], vl3[0]); |
240 |
for (i = 2; i < nv; i++) { |
241 |
VSUB(e2, vl3[i], vl3[0]); |
242 |
fcross(vc, e1, e2); |
243 |
ps->sdir[2][0] += vc[0]; |
244 |
ps->sdir[2][1] += vc[1]; |
245 |
ps->sdir[2][2] += vc[2]; |
246 |
VCOPY(e1, e2); |
247 |
} |
248 |
ps->area_left = .5 * normalize(ps->sdir[2]); |
249 |
if (ps->area_left == .0) { |
250 |
fputs(progname, stderr); |
251 |
fputs(": degenerate polygon in init_poly()\n", stderr); |
252 |
return(0); |
253 |
} |
254 |
/* create X & Y axes */ |
255 |
VCOPY(ps->sdir[0], e1); |
256 |
normalize(ps->sdir[0]); |
257 |
fcross(ps->sdir[1], ps->sdir[2], ps->sdir[0]); |
258 |
/* compute plane offset */ |
259 |
ps->poff = DOT(vl3[0], ps->sdir[2]); |
260 |
/* assign 2-D vertices */ |
261 |
for (i = 0; i < nv; i++) { |
262 |
vl2->v[i].mX = DOT(vl3[i], ps->sdir[0]); |
263 |
vl2->v[i].mY = DOT(vl3[i], ps->sdir[1]); |
264 |
} |
265 |
free(vl3); /* it's ready! */ |
266 |
return(vl2); |
267 |
} |
268 |
|
269 |
/* Generate samples on 2-D triangle */ |
270 |
static int |
271 |
sample_triangle(const Vert2_list *vl2, int a, int b, int c) |
272 |
{ |
273 |
POLYSAMP *ps = (POLYSAMP *)vl2->p; |
274 |
float *samp; |
275 |
FVECT orig; |
276 |
FVECT ab, ac; |
277 |
double area; |
278 |
int i, j, ns; |
279 |
/* compute sampling axes */ |
280 |
for (i = 3; i--; ) { |
281 |
orig[i] = vl2->v[a].mX*ps->sdir[0][i] + |
282 |
vl2->v[a].mY*ps->sdir[1][i] + |
283 |
(ps->poff+.001)*ps->sdir[2][i]; |
284 |
ab[i] = (vl2->v[b].mX - vl2->v[a].mX)*ps->sdir[0][i] + |
285 |
(vl2->v[b].mY - vl2->v[a].mY)*ps->sdir[1][i]; |
286 |
ac[i] = (vl2->v[c].mX - vl2->v[a].mX)*ps->sdir[0][i] + |
287 |
(vl2->v[c].mY - vl2->v[a].mY)*ps->sdir[1][i]; |
288 |
} |
289 |
/* compute number of samples to take */ |
290 |
area = .5*(vl2->v[a].mX*vl2->v[b].mY - vl2->v[b].mX*vl2->v[a].mY + |
291 |
vl2->v[b].mX*vl2->v[c].mY - vl2->v[c].mX*vl2->v[b].mY + |
292 |
vl2->v[c].mX*vl2->v[a].mY - vl2->v[a].mX*vl2->v[c].mY); |
293 |
if (area < .0) { |
294 |
fputs(progname, stderr); |
295 |
fputs(": negative triangle area in sample_triangle()\n", stderr); |
296 |
return(0); |
297 |
} |
298 |
if (area >= ps->area_left) { |
299 |
ns = ps->samp_left; |
300 |
ps->area_left = 0; |
301 |
} else { |
302 |
ns = (ps->samp_left*area/ps->area_left + .5); |
303 |
ps->samp_left -= ns; |
304 |
ps->area_left -= area; |
305 |
} |
306 |
if (ns <= 0) /* XXX should be error? */ |
307 |
return(1); |
308 |
/* buffer sample rays */ |
309 |
samp = (float *)malloc(sizeof(float)*6*ns); |
310 |
if (samp == NULL) |
311 |
return(0); |
312 |
for (i = ns; i--; ) { /* stratified Monte Carlo sampling */ |
313 |
double sv[4]; |
314 |
FVECT dv; |
315 |
multisamp(sv, 4, (i+frandom())/(double)ns); |
316 |
sv[0] *= sv[1] = sqrt(sv[1]); |
317 |
sv[1] = 1. - sv[1]; |
318 |
for (j = 3; j--; ) |
319 |
samp[i*6 + j] = orig[j] + sv[0]*ab[j] + sv[1]*ac[j]; |
320 |
sv[2] = sqrt(sv[2]); |
321 |
sv[3] *= 2.*PI; |
322 |
dv[0] = tcos(sv[3]) * sv[2]; |
323 |
dv[1] = tsin(sv[3]) * sv[2]; |
324 |
dv[2] = sqrt(1. - sv[2]*sv[2]); |
325 |
for (j = 3; j--; ) |
326 |
samp[i*6 + 3 + j] = dv[0]*ps->sdir[0][j] + |
327 |
dv[1]*ps->sdir[1][j] + |
328 |
dv[2]*ps->sdir[2][j] ; |
329 |
} |
330 |
/* send to our process */ |
331 |
writebuf(ps->wd, (char *)samp, sizeof(float)*6*ns); |
332 |
free(samp); /* that's it! */ |
333 |
return(1); |
334 |
} |
335 |
|
336 |
/* Sample the given surface */ |
337 |
static int |
338 |
sample_surface(IDF_PARAMETER *param, int wd) |
339 |
{ |
340 |
IDF_FIELD *fptr = get_vlist(param, NULL); |
341 |
POLYSAMP psamp; |
342 |
int nv; |
343 |
Vert2_list *vlist2; |
344 |
/* set up our polygon sampler */ |
345 |
if (fptr == NULL || (nv = atoi(fptr->val)) < 3 || |
346 |
(vlist2 = init_poly(&psamp, fptr->next, nv)) == NULL) { |
347 |
fprintf(stderr, "%s: bad polygon %s '%s'\n", |
348 |
progname, param->pname, |
349 |
idf_getfield(param,NAME_FLD)->val); |
350 |
return(0); |
351 |
} |
352 |
psamp.samp_left = NSAMPLES; /* assign samples & destination */ |
353 |
psamp.wd = wd; |
354 |
/* sample each subtriangle */ |
355 |
if (!polyTriangulate(vlist2, &sample_triangle)) |
356 |
return(0); |
357 |
polyFree(vlist2); /* clean up and return */ |
358 |
return(1); |
359 |
} |
360 |
|
361 |
/* Compute User View Factors using open rcontrib process */ |
362 |
static int |
363 |
compute_uvfs(SUBPROC *pd, ZONE *zp) |
364 |
{ |
365 |
IDF_PARAMETER *pptr, *pout, *pptr1; |
366 |
float *uvfa; |
367 |
char uvfbuf[24]; |
368 |
int n, m; |
369 |
/* create output parameter */ |
370 |
pout = idf_newparam(our_idf, UVF_PNAME, |
371 |
" ! computed by Radiance\n ", zp->plast); |
372 |
if (pout == NULL) { |
373 |
fputs(progname, stderr); |
374 |
fputs(": cannot create new IDF parameter\n", stderr); |
375 |
return(0); |
376 |
} |
377 |
if (!idf_addfield(pout, zp->zname, |
378 |
" !- Zone Name\n ")) { |
379 |
fputs(progname, stderr); |
380 |
fputs(": cannot add zone name field\n", stderr); |
381 |
return(0); |
382 |
} |
383 |
/* allocate read buffer */ |
384 |
uvfa = (float *)malloc(sizeof(float)*3*zp->nsurf); |
385 |
if (uvfa == NULL) |
386 |
return(0); |
387 |
/* UVFs from each surface */ |
388 |
for (n = zp->nsurf, pptr = zp->pfirst; n--; pptr = pptr->dnext) { |
389 |
double vfsum = 0; |
390 |
/* send samples to rcontrib */ |
391 |
if (!sample_surface(pptr, pd->w)) |
392 |
return(0); |
393 |
/* read results */ |
394 |
if (readbuf(pd->r, (char *)uvfa, sizeof(float)*3*zp->nsurf) != |
395 |
sizeof(float)*3*zp->nsurf) { |
396 |
fputs(progname, stderr); |
397 |
fputs(": read error from rcontrib process\n", stderr); |
398 |
return(0); |
399 |
} |
400 |
/* append UVF fields */ |
401 |
for (m = 0, pptr1 = zp->pfirst; |
402 |
m < zp->nsurf; m++, pptr1 = pptr1->dnext) { |
403 |
vfsum += uvfa[3*m + 1]; |
404 |
if (pptr1 == pptr) { |
405 |
if (uvfa[3*m + 1] > .001) |
406 |
fprintf(stderr, |
407 |
"%s: warning - non-zero self-VF (%.1f%%) for surface '%s'\n", |
408 |
progname, 100.*uvfa[3*m + 1], |
409 |
idf_getfield(pptr,NAME_FLD)->val); |
410 |
continue; /* don't record self-factor */ |
411 |
} |
412 |
sprintf(uvfbuf, "%.4f", uvfa[3*m + 1]); |
413 |
if (!idf_addfield(pout, |
414 |
idf_getfield(pptr,NAME_FLD)->val, NULL) || |
415 |
!idf_addfield(pout, |
416 |
idf_getfield(pptr1,NAME_FLD)->val, NULL) || |
417 |
!idf_addfield(pout, uvfbuf, |
418 |
(n || m < zp->nsurf-2) ? |
419 |
"\n " : "\n\n")) { |
420 |
fputs(progname, stderr); |
421 |
fputs(": error adding UVF fields\n", stderr); |
422 |
return(0); |
423 |
} |
424 |
} |
425 |
if (vfsum < 0.95) |
426 |
fprintf(stderr, |
427 |
"%s: warning - missing %.1f%% of energy from surface '%s'\n", |
428 |
progname, 100.*(1.-vfsum), |
429 |
idf_getfield(pptr,NAME_FLD)->val); |
430 |
} |
431 |
free(uvfa); /* clean up and return */ |
432 |
return(1); |
433 |
} |
434 |
|
435 |
/* Compute zone User View Factors */ |
436 |
static int |
437 |
compute_zones(void) |
438 |
{ |
439 |
ZONE *zptr; |
440 |
/* temporary octree name */ |
441 |
mktemp(strcpy(temp_octree, TEMPLATE)); |
442 |
/* compute each zone */ |
443 |
for (zptr = zone_list; zptr != NULL; zptr = zptr->next) { |
444 |
SUBPROC rcproc; |
445 |
/* start rcontrib process */ |
446 |
if (!start_rcontrib(&rcproc, zptr)) |
447 |
return(0); |
448 |
/* compute+add view factors */ |
449 |
if (!compute_uvfs(&rcproc, zptr)) |
450 |
return(0); |
451 |
if (close_process(&rcproc) != 0) { |
452 |
fputs(progname, stderr); |
453 |
fputs(": bad return status from rcontrib\n", stderr); |
454 |
return(0); |
455 |
} |
456 |
} |
457 |
unlink(temp_octree); /* remove octree file */ |
458 |
return(1); |
459 |
} |
460 |
|
461 |
/* Load IDF and compute User View Factors */ |
462 |
int |
463 |
main(int argc, char *argv[]) |
464 |
{ |
465 |
int incl_comments = 1; |
466 |
char *origIDF, *revIDF; |
467 |
IDF_PARAMETER *pptr; |
468 |
int i; |
469 |
|
470 |
progname = argv[0]; |
471 |
if (argc > 2 && !strcmp(argv[1], "-c")) { |
472 |
incl_comments = -1; /* output header only */ |
473 |
++argv; --argc; |
474 |
} |
475 |
if ((argc < 2) | (argc > 3)) { |
476 |
fputs("Usage: ", stderr); |
477 |
fputs(progname, stderr); |
478 |
fputs(" [-c] Model.idf [Revised.idf]\n", stderr); |
479 |
return(1); |
480 |
} |
481 |
origIDF = argv[1]; |
482 |
revIDF = (argc == 2) ? argv[1] : argv[2]; |
483 |
/* load Input Data File */ |
484 |
our_idf = idf_load(origIDF); |
485 |
if (our_idf == NULL) { |
486 |
fputs(progname, stderr); |
487 |
fputs(": cannot load IDF '", stderr); |
488 |
fputs(origIDF, stderr); |
489 |
fputs("'\n", stderr); |
490 |
return(1); |
491 |
} |
492 |
/* remove existing UVFs */ |
493 |
if ((pptr = idf_getparam(our_idf, UVF_PNAME)) != NULL) { |
494 |
IDF_PARAMETER *pnext; |
495 |
fputs(progname, stderr); |
496 |
fputs(": removing previous User View Factors\n", stderr); |
497 |
do { |
498 |
pnext = pptr->pnext; |
499 |
idf_delparam(our_idf, pptr); |
500 |
} while (pnext != NULL); |
501 |
} |
502 |
/* add to header */ |
503 |
if (our_idf->hrem == NULL || |
504 |
(i = strlen(our_idf->hrem)-strlen(ADD_HEADER)) < 0 || |
505 |
strcmp(our_idf->hrem+i, ADD_HEADER)) |
506 |
idf_add2hdr(our_idf, ADD_HEADER); |
507 |
/* gather zone surfaces */ |
508 |
for (i = 0; surf_type[i].pname != NULL; i++) |
509 |
for (pptr = idf_getparam(our_idf, surf_type[i].pname); |
510 |
pptr != NULL; pptr = pptr->pnext) { |
511 |
IDF_FIELD *fptr = idf_getfield(pptr, |
512 |
surf_type[i].zone_fld); |
513 |
if (fptr == NULL) { |
514 |
fputs(progname, stderr); |
515 |
fputs(": warning - missing zone field\n", stderr); |
516 |
continue; |
517 |
} |
518 |
if (add2zone(pptr, fptr->val) == NULL) |
519 |
return(1); |
520 |
} |
521 |
/* run rcontrib on each zone */ |
522 |
if (!compute_zones()) |
523 |
return(1); |
524 |
/* write out modified IDF */ |
525 |
if (!idf_write(our_idf, revIDF, incl_comments)) { |
526 |
fputs(progname, stderr); |
527 |
fputs(": error writing IDF '", stderr); |
528 |
fputs(revIDF, stderr); |
529 |
fputs("'\n", stderr); |
530 |
return(1); |
531 |
} |
532 |
return(0); /* finito! */ |
533 |
} |