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/* Copyright (c) 1996 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* ambient.c - routines dealing with ambient (inter-reflected) component. |
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* |
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* Declarations of external symbols in ambient.h |
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*/ |
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#include "ray.h" |
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#include "copyright.h" |
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|
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#include "octree.h" |
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#include <string.h> |
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#include "platform.h" |
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#include "ray.h" |
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#include "otypes.h" |
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|
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#include "resolu.h" |
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#include "ambient.h" |
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#include "random.h" |
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#ifndef OCTSCALE |
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#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
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#endif |
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|
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typedef struct ambtree { |
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AMBVAL *alist; /* ambient value list */ |
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struct ambtree *kid; /* 8 child nodes */ |
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} AMBTREE; /* ambient octree */ |
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|
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extern CUBE thescene; /* contains space boundaries */ |
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|
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extern char *shm_boundary; /* memory sharing boundary */ |
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|
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#define MAXASET 511 /* maximum number of elements in ambient set */ |
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#ifndef MAXASET |
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#define MAXASET 4095 /* maximum number of elements in ambient set */ |
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#endif |
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OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
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|
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double maxarad; /* maximum ambient radius */ |
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static int nunflshed = 0; /* number of unflushed ambient values */ |
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|
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#ifndef SORT_THRESH |
41 |
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#ifdef BIGMEM |
47 |
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#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
48 |
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#else |
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#ifdef SMLMEM |
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#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
43 |
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#else |
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#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
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#endif |
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#endif |
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#ifndef SORT_INTVL |
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static unsigned long ambclock = 0; /* ambient access clock */ |
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static unsigned long lastsort = 0; /* time of last value sort */ |
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static long sortintvl = SORT_INTVL; /* time until next sort */ |
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static FILE *ambinp = NULL; /* auxiliary file for input */ |
62 |
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static long lastpos = -1; /* last flush position */ |
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|
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#define MAXACLOCK (1L<<30) /* clock turnover value */ |
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/* |
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|
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#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
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|
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#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
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#define newambval() (AMBVAL *)malloc(sizeof(AMBVAL)) |
79 |
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#define freeav(av) free((void *)av); |
80 |
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|
81 |
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extern long ftell(), lseek(); |
82 |
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static int initambfile(), avsave(), avinsert(), sortambvals(), avlmemi(); |
83 |
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static AMBVAL *avstore(); |
81 |
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static void initambfile(int creat); |
82 |
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static void avsave(AMBVAL *av); |
83 |
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static AMBVAL *avstore(AMBVAL *aval); |
84 |
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static AMBTREE *newambtree(void); |
85 |
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static void freeambtree(AMBTREE *atp); |
86 |
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|
87 |
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typedef void unloadtf_t(void *); |
88 |
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static unloadtf_t avinsert; |
89 |
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static unloadtf_t av2list; |
90 |
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static void unloadatree(AMBTREE *at, unloadtf_t *f); |
91 |
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|
92 |
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static int aposcmp(const void *avp1, const void *avp2); |
93 |
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static int avlmemi(AMBVAL *avaddr); |
94 |
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static void sortambvals(int always); |
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|
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#ifdef F_SETLKW |
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static aflock(); |
97 |
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static void aflock(int typ); |
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#endif |
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|
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setambres(ar) /* set ambient resolution */ |
102 |
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int ar; |
101 |
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extern void |
102 |
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setambres( /* set ambient resolution */ |
103 |
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int ar |
104 |
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) |
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{ |
106 |
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ambres = ar < 0 ? 0 : ar; /* may be done already */ |
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/* set min & max radii */ |
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} |
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123 |
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124 |
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setambacc(newa) /* set ambient accuracy */ |
125 |
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double newa; |
124 |
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extern void |
125 |
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setambacc( /* set ambient accuracy */ |
126 |
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double newa |
127 |
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) |
128 |
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{ |
129 |
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double ambdiff; |
130 |
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|
136 |
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} |
137 |
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|
138 |
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|
139 |
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setambient(afile) /* initialize calculation */ |
140 |
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char *afile; |
139 |
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extern void |
140 |
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setambient(void) /* initialize calculation */ |
141 |
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{ |
142 |
< |
long pos, flen; |
142 |
> |
int readonly = 0; |
143 |
> |
long flen; |
144 |
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AMBVAL amb; |
145 |
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/* make sure we're fresh */ |
146 |
+ |
ambdone(); |
147 |
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/* init ambient limits */ |
148 |
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setambres(ambres); |
149 |
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setambacc(ambacc); |
150 |
< |
if (afile == NULL) |
150 |
> |
if (ambfile == NULL || !ambfile[0]) |
151 |
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return; |
152 |
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if (ambacc <= FTINY) { |
153 |
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sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
154 |
< |
afile); |
154 |
> |
ambfile); |
155 |
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error(WARNING, errmsg); |
156 |
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return; |
157 |
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} |
158 |
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/* open ambient file */ |
159 |
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if ((ambfp = fopen(afile, "r+")) != NULL) { |
160 |
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initambfile(0); |
161 |
< |
pos = ftell(ambfp); |
159 |
> |
if ((ambfp = fopen(ambfile, "r+")) == NULL) |
160 |
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readonly = (ambfp = fopen(ambfile, "r")) != NULL; |
161 |
> |
if (ambfp != NULL) { |
162 |
> |
initambfile(0); /* file exists */ |
163 |
> |
lastpos = ftell(ambfp); |
164 |
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while (readambval(&amb, ambfp)) |
165 |
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avinsert(avstore(&amb)); |
166 |
< |
/* align */ |
167 |
< |
pos += (long)nambvals*AMBVALSIZ; |
149 |
< |
flen = lseek(fileno(ambfp), 0L, 2); |
150 |
< |
if (flen != pos) { |
166 |
> |
nambshare = nambvals; /* share loaded values */ |
167 |
> |
if (readonly) { |
168 |
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sprintf(errmsg, |
169 |
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"loaded %u values from read-only ambient file", |
170 |
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nambvals); |
171 |
+ |
error(WARNING, errmsg); |
172 |
+ |
fclose(ambfp); /* close file so no writes */ |
173 |
+ |
ambfp = NULL; |
174 |
+ |
return; /* avoid ambsync() */ |
175 |
+ |
} |
176 |
+ |
/* align file pointer */ |
177 |
+ |
lastpos += (long)nambvals*AMBVALSIZ; |
178 |
+ |
flen = lseek(fileno(ambfp), (off_t)0, SEEK_END); |
179 |
+ |
if (flen != lastpos) { |
180 |
+ |
sprintf(errmsg, |
181 |
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"ignoring last %ld values in ambient file (corrupted)", |
182 |
< |
(flen - pos)/AMBVALSIZ); |
182 |
> |
(flen - lastpos)/AMBVALSIZ); |
183 |
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error(WARNING, errmsg); |
184 |
< |
fseek(ambfp, pos, 0); |
185 |
< |
ftruncate(fileno(ambfp), pos); |
184 |
> |
fseek(ambfp, lastpos, SEEK_SET); |
185 |
> |
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
186 |
> |
ftruncate(fileno(ambfp), (off_t)lastpos); |
187 |
> |
#endif |
188 |
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} |
189 |
< |
nambshare = nambvals; |
190 |
< |
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
191 |
< |
initambfile(1); |
192 |
< |
else { |
193 |
< |
sprintf(errmsg, "cannot open ambient file \"%s\"", afile); |
189 |
> |
} else if ((ambfp = fopen(ambfile, "w+")) != NULL) { |
190 |
> |
initambfile(1); /* else create new file */ |
191 |
> |
fflush(ambfp); |
192 |
> |
lastpos = ftell(ambfp); |
193 |
> |
} else { |
194 |
> |
sprintf(errmsg, "cannot open ambient file \"%s\"", ambfile); |
195 |
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error(SYSTEM, errmsg); |
196 |
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} |
197 |
< |
nunflshed++; /* lie */ |
198 |
< |
ambsync(); |
197 |
> |
#ifdef F_SETLKW |
198 |
> |
aflock(F_UNLCK); /* release file */ |
199 |
> |
#endif |
200 |
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} |
201 |
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|
202 |
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|
203 |
< |
ambnotify(obj) /* record new modifier */ |
204 |
< |
OBJECT obj; |
203 |
> |
extern void |
204 |
> |
ambdone(void) /* close ambient file and free memory */ |
205 |
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{ |
206 |
+ |
if (ambfp != NULL) { /* close ambient file */ |
207 |
+ |
ambsync(); |
208 |
+ |
fclose(ambfp); |
209 |
+ |
ambfp = NULL; |
210 |
+ |
if (ambinp != NULL) { |
211 |
+ |
fclose(ambinp); |
212 |
+ |
ambinp = NULL; |
213 |
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} |
214 |
+ |
lastpos = -1; |
215 |
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} |
216 |
+ |
/* free ambient tree */ |
217 |
+ |
unloadatree(&atrunk, free); |
218 |
+ |
/* reset state variables */ |
219 |
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avsum = 0.; |
220 |
+ |
navsum = 0; |
221 |
+ |
nambvals = 0; |
222 |
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nambshare = 0; |
223 |
+ |
ambclock = 0; |
224 |
+ |
lastsort = 0; |
225 |
+ |
sortintvl = SORT_INTVL; |
226 |
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} |
227 |
+ |
|
228 |
+ |
|
229 |
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extern void |
230 |
+ |
ambnotify( /* record new modifier */ |
231 |
+ |
OBJECT obj |
232 |
+ |
) |
233 |
+ |
{ |
234 |
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static int hitlimit = 0; |
235 |
< |
register OBJREC *o = objptr(obj); |
236 |
< |
register char **amblp; |
235 |
> |
OBJREC *o; |
236 |
> |
char **amblp; |
237 |
|
|
238 |
+ |
if (obj == OVOID) { /* starting over */ |
239 |
+ |
ambset[0] = 0; |
240 |
+ |
hitlimit = 0; |
241 |
+ |
return; |
242 |
+ |
} |
243 |
+ |
o = objptr(obj); |
244 |
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if (hitlimit || !ismodifier(o->otype)) |
245 |
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return; |
246 |
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for (amblp = amblist; *amblp != NULL; amblp++) |
256 |
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} |
257 |
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|
258 |
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|
259 |
< |
ambient(acol, r, nrm) /* compute ambient component for ray */ |
260 |
< |
COLOR acol; |
261 |
< |
register RAY *r; |
262 |
< |
FVECT nrm; |
259 |
> |
extern void |
260 |
> |
multambient( /* compute ambient component & multiply by coef. */ |
261 |
> |
COLOR aval, |
262 |
> |
RAY *r, |
263 |
> |
FVECT nrm |
264 |
> |
) |
265 |
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{ |
266 |
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static int rdepth = 0; /* ambient recursion */ |
267 |
+ |
COLOR acol; |
268 |
|
double d, l; |
269 |
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|
270 |
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if (ambdiv <= 0) /* no ambient calculation */ |
278 |
|
goto dumbamb; |
279 |
|
|
280 |
|
if (ambacc <= FTINY) { /* no ambient storage */ |
281 |
+ |
copycolor(acol, aval); |
282 |
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rdepth++; |
283 |
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d = doambient(acol, r, r->rweight, NULL, NULL); |
284 |
|
rdepth--; |
285 |
|
if (d <= FTINY) |
286 |
|
goto dumbamb; |
287 |
+ |
copycolor(aval, acol); |
288 |
|
return; |
289 |
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} |
290 |
|
|
291 |
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if (tracktime) /* sort to minimize thrashing */ |
292 |
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sortambvals(0); |
293 |
< |
/* get ambient value */ |
293 |
> |
/* interpolate ambient value */ |
294 |
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setcolor(acol, 0.0, 0.0, 0.0); |
295 |
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d = sumambient(acol, r, nrm, rdepth, |
296 |
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&atrunk, thescene.cuorg, thescene.cusize); |
297 |
|
if (d > FTINY) { |
298 |
< |
scalecolor(acol, 1.0/d); |
298 |
> |
d = 1.0/d; |
299 |
> |
scalecolor(acol, d); |
300 |
> |
multcolor(aval, acol); |
301 |
|
return; |
302 |
|
} |
303 |
|
rdepth++; /* need to cache new value */ |
304 |
|
d = makeambient(acol, r, nrm, rdepth-1); |
305 |
|
rdepth--; |
306 |
< |
if (d > FTINY) |
306 |
> |
if (d > FTINY) { |
307 |
> |
multcolor(aval, acol); /* got new value */ |
308 |
|
return; |
309 |
+ |
} |
310 |
|
dumbamb: /* return global value */ |
311 |
< |
copycolor(acol, ambval); |
312 |
< |
if (ambvwt <= 0 | navsum == 0) |
311 |
> |
if ((ambvwt <= 0) | (navsum == 0)) { |
312 |
> |
multcolor(aval, ambval); |
313 |
|
return; |
314 |
+ |
} |
315 |
|
l = bright(ambval); /* average in computations */ |
316 |
|
if (l > FTINY) { |
317 |
|
d = (log(l)*(double)ambvwt + avsum) / |
318 |
|
(double)(ambvwt + navsum); |
319 |
|
d = exp(d) / l; |
320 |
< |
scalecolor(acol, d); /* apply color of ambval */ |
320 |
> |
scalecolor(aval, d); |
321 |
> |
multcolor(aval, ambval); /* apply color of ambval */ |
322 |
|
} else { |
323 |
|
d = exp( avsum / (double)navsum ); |
324 |
< |
setcolor(acol, d, d, d); /* neutral color */ |
324 |
> |
scalecolor(aval, d); /* neutral color */ |
325 |
|
} |
326 |
|
} |
327 |
|
|
328 |
|
|
329 |
< |
double |
330 |
< |
sumambient(acol, r, rn, al, at, c0, s) /* get interpolated ambient value */ |
331 |
< |
COLOR acol; |
332 |
< |
register RAY *r; |
333 |
< |
FVECT rn; |
334 |
< |
int al; |
335 |
< |
AMBTREE *at; |
336 |
< |
FVECT c0; |
337 |
< |
double s; |
329 |
> |
extern double |
330 |
> |
sumambient( /* get interpolated ambient value */ |
331 |
> |
COLOR acol, |
332 |
> |
RAY *r, |
333 |
> |
FVECT rn, |
334 |
> |
int al, |
335 |
> |
AMBTREE *at, |
336 |
> |
FVECT c0, |
337 |
> |
double s |
338 |
> |
) |
339 |
|
{ |
340 |
|
double d, e1, e2, wt, wsum; |
341 |
|
COLOR ct; |
342 |
|
FVECT ck0; |
343 |
|
int i; |
344 |
< |
register int j; |
345 |
< |
register AMBVAL *av; |
344 |
> |
int j; |
345 |
> |
AMBVAL *av; |
346 |
|
|
347 |
|
wsum = 0.0; |
348 |
|
/* do this node */ |
349 |
|
for (av = at->alist; av != NULL; av = av->next) { |
350 |
+ |
double rn_dot = -2.0; |
351 |
|
if (tracktime) |
352 |
|
av->latick = ambclock; |
353 |
|
/* |
355 |
|
*/ |
356 |
|
if (av->lvl > al) /* list sorted, so this works */ |
357 |
|
break; |
358 |
< |
if (av->weight < r->rweight-FTINY) |
358 |
> |
if (av->weight < 0.9*r->rweight) |
359 |
|
continue; |
360 |
|
/* |
361 |
|
* Ambient radius test. |
362 |
|
*/ |
363 |
< |
d = av->pos[0] - r->rop[0]; |
364 |
< |
e1 = d * d; |
285 |
< |
d = av->pos[1] - r->rop[1]; |
286 |
< |
e1 += d * d; |
287 |
< |
d = av->pos[2] - r->rop[2]; |
288 |
< |
e1 += d * d; |
289 |
< |
e1 /= av->rad * av->rad; |
363 |
> |
VSUB(ck0, av->pos, r->rop); |
364 |
> |
e1 = DOT(ck0, ck0) / (av->rad * av->rad); |
365 |
|
if (e1 > ambacc*ambacc*1.21) |
366 |
|
continue; |
367 |
|
/* |
368 |
< |
* Normal direction test. |
368 |
> |
* Direction test using closest normal. |
369 |
|
*/ |
370 |
< |
e2 = (1.0 - DOT(av->dir, r->ron)) * r->rweight; |
371 |
< |
if (e2 < 0.0) e2 = 0.0; |
372 |
< |
if (e1 + e2 > ambacc*ambacc*1.21) |
370 |
> |
d = DOT(av->dir, r->ron); |
371 |
> |
if (rn != r->ron) { |
372 |
> |
rn_dot = DOT(av->dir, rn); |
373 |
> |
if (rn_dot > 1.0-FTINY) |
374 |
> |
rn_dot = 1.0-FTINY; |
375 |
> |
if (rn_dot >= d-FTINY) { |
376 |
> |
d = rn_dot; |
377 |
> |
rn_dot = -2.0; |
378 |
> |
} |
379 |
> |
} |
380 |
> |
e2 = (1.0 - d) * r->rweight; |
381 |
> |
if (e2 < 0.0) |
382 |
> |
e2 = 0.0; |
383 |
> |
else if (e1 + e2 > ambacc*ambacc*1.21) |
384 |
|
continue; |
385 |
|
/* |
386 |
|
* Ray behind test. |
394 |
|
/* |
395 |
|
* Jittering final test reduces image artifacts. |
396 |
|
*/ |
397 |
< |
wt = sqrt(e1) + sqrt(e2); |
397 |
> |
e1 = sqrt(e1); |
398 |
> |
e2 = sqrt(e2); |
399 |
> |
wt = e1 + e2; |
400 |
|
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
401 |
|
continue; |
402 |
+ |
/* |
403 |
+ |
* Recompute directional error using perturbed normal |
404 |
+ |
*/ |
405 |
+ |
if (rn_dot > 0.0) { |
406 |
+ |
e2 = sqrt((1.0 - rn_dot)*r->rweight); |
407 |
+ |
wt = e1 + e2; |
408 |
+ |
} |
409 |
|
if (wt <= 1e-3) |
410 |
|
wt = 1e3; |
411 |
|
else |
430 |
|
break; |
431 |
|
} |
432 |
|
if (j == 3) |
433 |
< |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
433 |
> |
wsum += sumambient(acol, r, rn, al, |
434 |
> |
at->kid+i, ck0, s); |
435 |
|
} |
436 |
|
return(wsum); |
437 |
|
} |
438 |
|
|
439 |
|
|
440 |
< |
double |
441 |
< |
makeambient(acol, r, rn, al) /* make a new ambient value */ |
442 |
< |
COLOR acol; |
443 |
< |
register RAY *r; |
444 |
< |
FVECT rn; |
445 |
< |
int al; |
440 |
> |
extern double |
441 |
> |
makeambient( /* make a new ambient value for storage */ |
442 |
> |
COLOR acol, |
443 |
> |
RAY *r, |
444 |
> |
FVECT rn, |
445 |
> |
int al |
446 |
> |
) |
447 |
|
{ |
448 |
|
AMBVAL amb; |
449 |
|
FVECT gp, gd; |
450 |
< |
/* compute weight */ |
451 |
< |
amb.weight = pow(AVGREFL, (double)al); |
452 |
< |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
453 |
< |
amb.weight = r->rweight; |
450 |
> |
int i; |
451 |
> |
|
452 |
> |
amb.weight = 1.0; /* compute weight */ |
453 |
> |
for (i = al; i-- > 0; ) |
454 |
> |
amb.weight *= AVGREFL; |
455 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic override */ |
456 |
> |
amb.weight = 1.25*r->rweight; |
457 |
> |
setcolor(acol, AVGREFL, AVGREFL, AVGREFL); |
458 |
|
/* compute ambient */ |
459 |
|
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
460 |
< |
if (amb.rad <= FTINY) |
460 |
> |
if (amb.rad <= FTINY) { |
461 |
> |
setcolor(acol, 0.0, 0.0, 0.0); |
462 |
|
return(0.0); |
463 |
< |
/* store it */ |
463 |
> |
} |
464 |
> |
scalecolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
465 |
> |
/* store value */ |
466 |
|
VCOPY(amb.pos, r->rop); |
467 |
|
VCOPY(amb.dir, r->ron); |
468 |
|
amb.lvl = al; |
477 |
|
} |
478 |
|
|
479 |
|
|
480 |
< |
extambient(cr, ap, pv, nv) /* extrapolate value at pv, nv */ |
481 |
< |
COLOR cr; |
482 |
< |
register AMBVAL *ap; |
483 |
< |
FVECT pv, nv; |
480 |
> |
extern void |
481 |
> |
extambient( /* extrapolate value at pv, nv */ |
482 |
> |
COLOR cr, |
483 |
> |
AMBVAL *ap, |
484 |
> |
FVECT pv, |
485 |
> |
FVECT nv |
486 |
> |
) |
487 |
|
{ |
488 |
< |
FVECT v1, v2; |
489 |
< |
register int i; |
488 |
> |
FVECT v1; |
489 |
> |
int i; |
490 |
|
double d; |
491 |
|
|
492 |
|
d = 1.0; /* zeroeth order */ |
494 |
|
for (i = 0; i < 3; i++) |
495 |
|
d += ap->gpos[i]*(pv[i]-ap->pos[i]); |
496 |
|
/* gradient due to rotation */ |
497 |
< |
VCOPY(v1, ap->dir); |
498 |
< |
fcross(v2, v1, nv); |
392 |
< |
d += DOT(ap->gdir, v2); |
497 |
> |
VCROSS(v1, ap->dir, nv); |
498 |
> |
d += DOT(ap->gdir, v1); |
499 |
|
if (d <= 0.0) { |
500 |
|
setcolor(cr, 0.0, 0.0, 0.0); |
501 |
|
return; |
505 |
|
} |
506 |
|
|
507 |
|
|
508 |
< |
static |
509 |
< |
initambfile(creat) /* initialize ambient file */ |
510 |
< |
int creat; |
508 |
> |
static void |
509 |
> |
initambfile( /* initialize ambient file */ |
510 |
> |
int cre8 |
511 |
> |
) |
512 |
|
{ |
513 |
< |
extern char *progname, *octname, VersionID[]; |
513 |
> |
extern char *progname, *octname; |
514 |
> |
static char *mybuf = NULL; |
515 |
|
|
516 |
|
#ifdef F_SETLKW |
517 |
< |
aflock(creat ? F_WRLCK : F_RDLCK); |
517 |
> |
aflock(cre8 ? F_WRLCK : F_RDLCK); |
518 |
|
#endif |
519 |
< |
#ifdef MSDOS |
520 |
< |
setmode(fileno(ambfp), O_BINARY); |
521 |
< |
#endif |
522 |
< |
setbuf(ambfp, bmalloc(BUFSIZ+8)); |
523 |
< |
if (creat) { /* new file */ |
519 |
> |
SET_FILE_BINARY(ambfp); |
520 |
> |
if (mybuf == NULL) |
521 |
> |
mybuf = (char *)bmalloc(BUFSIZ+8); |
522 |
> |
setbuf(ambfp, mybuf); |
523 |
> |
if (cre8) { /* new file */ |
524 |
|
newheader("RADIANCE", ambfp); |
525 |
|
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
526 |
|
progname, colval(ambval,RED), |
527 |
|
colval(ambval,GRN), colval(ambval,BLU), |
528 |
|
ambvwt, ambounce, ambacc); |
529 |
< |
fprintf(ambfp, "-ad %d -as %d -ar %d %s\n", |
530 |
< |
ambdiv, ambssamp, ambres, |
531 |
< |
octname==NULL ? "" : octname); |
529 |
> |
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
530 |
> |
ambdiv, ambssamp, ambres); |
531 |
> |
if (octname != NULL) |
532 |
> |
fputs(octname, ambfp); |
533 |
> |
fputc('\n', ambfp); |
534 |
|
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
535 |
+ |
fputnow(ambfp); |
536 |
|
fputformat(AMBFMT, ambfp); |
537 |
< |
putc('\n', ambfp); |
537 |
> |
fputc('\n', ambfp); |
538 |
|
putambmagic(ambfp); |
539 |
|
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
540 |
|
error(USER, "bad ambient file"); |
541 |
|
} |
542 |
|
|
543 |
|
|
544 |
< |
static |
545 |
< |
avsave(av) /* insert and save an ambient value */ |
546 |
< |
AMBVAL *av; |
544 |
> |
static void |
545 |
> |
avsave( /* insert and save an ambient value */ |
546 |
> |
AMBVAL *av |
547 |
> |
) |
548 |
|
{ |
549 |
|
avinsert(avstore(av)); |
550 |
|
if (ambfp == NULL) |
556 |
|
goto writerr; |
557 |
|
return; |
558 |
|
writerr: |
559 |
< |
error(SYSTEM, "error writing ambient file"); |
559 |
> |
error(SYSTEM, "error writing to ambient file"); |
560 |
|
} |
561 |
|
|
562 |
|
|
563 |
|
static AMBVAL * |
564 |
< |
avstore(aval) /* allocate memory and store aval */ |
565 |
< |
register AMBVAL *aval; |
564 |
> |
avstore( /* allocate memory and store aval */ |
565 |
> |
AMBVAL *aval |
566 |
> |
) |
567 |
|
{ |
568 |
< |
register AMBVAL *av; |
568 |
> |
AMBVAL *av; |
569 |
|
double d; |
570 |
|
|
571 |
|
if ((av = newambval()) == NULL) |
572 |
|
error(SYSTEM, "out of memory in avstore"); |
573 |
< |
copystruct(av, aval); |
573 |
> |
*av = *aval; |
574 |
|
av->latick = ambclock; |
575 |
|
av->next = NULL; |
576 |
|
nambvals++; |
588 |
|
static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
589 |
|
|
590 |
|
|
591 |
< |
static |
592 |
< |
AMBTREE * |
480 |
< |
newambtree() /* allocate 8 ambient tree structs */ |
591 |
> |
static AMBTREE * |
592 |
> |
newambtree(void) /* allocate 8 ambient tree structs */ |
593 |
|
{ |
594 |
< |
register AMBTREE *atp, *upperlim; |
594 |
> |
AMBTREE *atp, *upperlim; |
595 |
|
|
596 |
|
if (atfreelist == NULL) { /* get more nodes */ |
597 |
< |
atfreelist = (AMBTREE *)bmalloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
597 |
> |
atfreelist = (AMBTREE *)malloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
598 |
|
if (atfreelist == NULL) |
599 |
|
return(NULL); |
600 |
|
/* link new free list */ |
605 |
|
} |
606 |
|
atp = atfreelist; |
607 |
|
atfreelist = atp->kid; |
608 |
< |
bzero((char *)atp, 8*sizeof(AMBTREE)); |
608 |
> |
memset((char *)atp, '\0', 8*sizeof(AMBTREE)); |
609 |
|
return(atp); |
610 |
|
} |
611 |
|
|
612 |
|
|
613 |
< |
static |
614 |
< |
freeambtree(atp) /* free 8 ambient tree structs */ |
615 |
< |
AMBTREE *atp; |
613 |
> |
static void |
614 |
> |
freeambtree( /* free 8 ambient tree structs */ |
615 |
> |
AMBTREE *atp |
616 |
> |
) |
617 |
|
{ |
618 |
|
atp->kid = atfreelist; |
619 |
|
atfreelist = atp; |
620 |
|
} |
621 |
|
|
622 |
|
|
623 |
< |
static |
624 |
< |
avinsert(av) /* insert ambient value in our tree */ |
625 |
< |
register AMBVAL *av; |
623 |
> |
static void |
624 |
> |
avinsert( /* insert ambient value in our tree */ |
625 |
> |
void *av |
626 |
> |
) |
627 |
|
{ |
628 |
< |
register AMBTREE *at; |
629 |
< |
register AMBVAL *ap; |
628 |
> |
AMBTREE *at; |
629 |
> |
AMBVAL *ap; |
630 |
|
AMBVAL avh; |
631 |
|
FVECT ck0; |
632 |
|
double s; |
633 |
|
int branch; |
634 |
< |
register int i; |
634 |
> |
int i; |
635 |
|
|
636 |
< |
if (av->rad <= FTINY) |
636 |
> |
if (((AMBVAL*)av)->rad <= FTINY) |
637 |
|
error(CONSISTENCY, "zero ambient radius in avinsert"); |
638 |
|
at = &atrunk; |
639 |
|
VCOPY(ck0, thescene.cuorg); |
640 |
|
s = thescene.cusize; |
641 |
< |
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
641 |
> |
while (s*(OCTSCALE/2) > ((AMBVAL*)av)->rad*ambacc) { |
642 |
|
if (at->kid == NULL) |
643 |
|
if ((at->kid = newambtree()) == NULL) |
644 |
|
error(SYSTEM, "out of memory in avinsert"); |
645 |
|
s *= 0.5; |
646 |
|
branch = 0; |
647 |
|
for (i = 0; i < 3; i++) |
648 |
< |
if (av->pos[i] > ck0[i] + s) { |
648 |
> |
if (((AMBVAL*)av)->pos[i] > ck0[i] + s) { |
649 |
|
ck0[i] += s; |
650 |
|
branch |= 1 << i; |
651 |
|
} |
653 |
|
} |
654 |
|
avh.next = at->alist; /* order by increasing level */ |
655 |
|
for (ap = &avh; ap->next != NULL; ap = ap->next) |
656 |
< |
if (ap->next->lvl >= av->lvl) |
656 |
> |
if (ap->next->lvl >= ((AMBVAL*)av)->lvl) |
657 |
|
break; |
658 |
< |
av->next = ap->next; |
659 |
< |
ap->next = av; |
658 |
> |
((AMBVAL*)av)->next = ap->next; |
659 |
> |
ap->next = (AMBVAL*)av; |
660 |
|
at->alist = avh.next; |
661 |
|
} |
662 |
|
|
663 |
|
|
664 |
< |
static |
665 |
< |
unloadatree(at, f) /* unload an ambient value tree */ |
666 |
< |
register AMBTREE *at; |
667 |
< |
int (*f)(); |
664 |
> |
static void |
665 |
> |
unloadatree( /* unload an ambient value tree */ |
666 |
> |
AMBTREE *at, |
667 |
> |
unloadtf_t *f |
668 |
> |
) |
669 |
|
{ |
670 |
< |
register AMBVAL *av; |
671 |
< |
register int i; |
670 |
> |
AMBVAL *av; |
671 |
> |
int i; |
672 |
|
/* transfer values at this node */ |
673 |
|
for (av = at->alist; av != NULL; av = at->alist) { |
674 |
|
at->alist = av->next; |
690 |
|
static AMBVAL **avlist2; /* memory positions for sorting */ |
691 |
|
static int i_avlist; /* index for lists */ |
692 |
|
|
693 |
+ |
static int alatcmp(const void *av1, const void *av2); |
694 |
|
|
695 |
< |
static |
696 |
< |
av2list(av) |
697 |
< |
register AMBVAL *av; |
695 |
> |
static void |
696 |
> |
av2list( |
697 |
> |
void *av |
698 |
> |
) |
699 |
|
{ |
700 |
|
#ifdef DEBUG |
701 |
|
if (i_avlist >= nambvals) |
702 |
|
error(CONSISTENCY, "too many ambient values in av2list1"); |
703 |
|
#endif |
704 |
< |
avlist1[i_avlist].p = avlist2[i_avlist] = av; |
705 |
< |
avlist1[i_avlist++].t = av->latick; |
704 |
> |
avlist1[i_avlist].p = avlist2[i_avlist] = (AMBVAL*)av; |
705 |
> |
avlist1[i_avlist++].t = ((AMBVAL*)av)->latick; |
706 |
|
} |
707 |
|
|
708 |
|
|
709 |
|
static int |
710 |
< |
alatcmp(av1, av2) /* compare ambient values for MRA */ |
711 |
< |
struct avl *av1, *av2; |
710 |
> |
alatcmp( /* compare ambient values for MRA */ |
711 |
> |
const void *av1, |
712 |
> |
const void *av2 |
713 |
> |
) |
714 |
|
{ |
715 |
< |
register long lc = av2->t - av1->t; |
715 |
> |
long lc = ((struct avl *)av2)->t - ((struct avl *)av1)->t; |
716 |
|
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
717 |
|
} |
718 |
|
|
719 |
|
|
720 |
+ |
/* GW NOTE 2002/10/3: |
721 |
+ |
* I used to compare AMBVAL pointers, but found that this was the |
722 |
+ |
* cause of a serious consistency error with gcc, since the optimizer |
723 |
+ |
* uses some dangerous trick in pointer subtraction that |
724 |
+ |
* assumes pointers differ by exact struct size increments. |
725 |
+ |
*/ |
726 |
|
static int |
727 |
< |
aposcmp(avp1, avp2) /* compare ambient value positions */ |
728 |
< |
AMBVAL **avp1, **avp2; |
727 |
> |
aposcmp( /* compare ambient value positions */ |
728 |
> |
const void *avp1, |
729 |
> |
const void *avp2 |
730 |
> |
) |
731 |
|
{ |
732 |
< |
return(*avp1 - *avp2); |
732 |
> |
long diff = *(char * const *)avp1 - *(char * const *)avp2; |
733 |
> |
if (diff < 0) |
734 |
> |
return(-1); |
735 |
> |
return(diff > 0); |
736 |
|
} |
737 |
|
|
608 |
– |
|
738 |
|
#if 1 |
739 |
|
static int |
740 |
< |
avlmemi(avaddr) /* find list position from address */ |
741 |
< |
AMBVAL *avaddr; |
740 |
> |
avlmemi( /* find list position from address */ |
741 |
> |
AMBVAL *avaddr |
742 |
> |
) |
743 |
|
{ |
744 |
< |
register AMBVAL **avlpp; |
744 |
> |
AMBVAL **avlpp; |
745 |
|
|
746 |
|
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
747 |
|
nambvals, sizeof(AMBVAL *), aposcmp); |
755 |
|
#endif |
756 |
|
|
757 |
|
|
758 |
< |
static |
759 |
< |
sortambvals(always) /* resort ambient values */ |
760 |
< |
int always; |
758 |
> |
static void |
759 |
> |
sortambvals( /* resort ambient values */ |
760 |
> |
int always |
761 |
> |
) |
762 |
|
{ |
763 |
|
AMBTREE oldatrunk; |
764 |
|
AMBVAL tav, *tap, *pnext; |
765 |
< |
register int i, j; |
765 |
> |
int i, j; |
766 |
|
/* see if it's time yet */ |
767 |
|
if (!always && (ambclock++ < lastsort+sortintvl || |
768 |
|
nambvals < SORT_THRESH)) |
791 |
|
} |
792 |
|
if (avlist1 == NULL) { /* no time tracking -- rebuild tree? */ |
793 |
|
if (avlist2 != NULL) |
794 |
< |
free((char *)avlist2); |
794 |
> |
free((void *)avlist2); |
795 |
|
if (always) { /* rebuild without sorting */ |
796 |
< |
copystruct(&oldatrunk, &atrunk); |
796 |
> |
oldatrunk = atrunk; |
797 |
|
atrunk.alist = NULL; |
798 |
|
atrunk.kid = NULL; |
799 |
|
unloadatree(&oldatrunk, avinsert); |
824 |
|
if (avlist1[i].p == NULL) |
825 |
|
continue; |
826 |
|
tap = avlist2[i]; |
827 |
< |
copystruct(&tav, tap); |
827 |
> |
tav = *tap; |
828 |
|
for (j = i; (pnext = avlist1[j].p) != tap; |
829 |
|
j = avlmemi(pnext)) { |
830 |
< |
copystruct(avlist2[j], pnext); |
830 |
> |
*(avlist2[j]) = *pnext; |
831 |
|
avinsert(avlist2[j]); |
832 |
|
avlist1[j].p = NULL; |
833 |
|
} |
834 |
< |
copystruct(avlist2[j], &tav); |
834 |
> |
*(avlist2[j]) = tav; |
835 |
|
avinsert(avlist2[j]); |
836 |
|
avlist1[j].p = NULL; |
837 |
|
} |
838 |
< |
free((char *)avlist1); |
839 |
< |
free((char *)avlist2); |
838 |
> |
free((void *)avlist1); |
839 |
> |
free((void *)avlist2); |
840 |
|
/* compute new sort interval */ |
841 |
|
sortintvl = ambclock - lastsort; |
842 |
|
if (sortintvl >= MAX_SORT_INTVL/2) |
855 |
|
|
856 |
|
#ifdef F_SETLKW |
857 |
|
|
858 |
< |
static |
859 |
< |
aflock(typ) /* lock/unlock ambient file */ |
860 |
< |
int typ; |
858 |
> |
static void |
859 |
> |
aflock( /* lock/unlock ambient file */ |
860 |
> |
int typ |
861 |
> |
) |
862 |
|
{ |
863 |
|
static struct flock fls; /* static so initialized to zeroes */ |
864 |
|
|
865 |
+ |
if (typ == fls.l_type) /* already called? */ |
866 |
+ |
return; |
867 |
|
fls.l_type = typ; |
868 |
|
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
869 |
|
error(SYSTEM, "cannot (un)lock ambient file"); |
870 |
|
} |
871 |
|
|
872 |
|
|
873 |
< |
int |
874 |
< |
ambsync() /* synchronize ambient file */ |
873 |
> |
extern int |
874 |
> |
ambsync(void) /* synchronize ambient file */ |
875 |
|
{ |
742 |
– |
static FILE *ambinp = NULL; |
743 |
– |
static long lastpos = -1; |
876 |
|
long flen; |
877 |
|
AMBVAL avs; |
878 |
< |
register int n; |
878 |
> |
int n; |
879 |
|
|
880 |
< |
if (nunflshed == 0) |
880 |
> |
if (ambfp == NULL) /* no ambient file? */ |
881 |
|
return(0); |
882 |
< |
if (lastpos < 0) /* initializing (locked in initambfile) */ |
883 |
< |
goto syncend; |
752 |
< |
/* gain exclusive access */ |
753 |
< |
aflock(F_WRLCK); |
882 |
> |
/* gain appropriate access */ |
883 |
> |
aflock(nunflshed ? F_WRLCK : F_RDLCK); |
884 |
|
/* see if file has grown */ |
885 |
< |
if ((flen = lseek(fileno(ambfp), 0L, 2)) < 0) |
885 |
> |
if ((flen = lseek(fileno(ambfp), (off_t)0, SEEK_END)) < 0) |
886 |
|
goto seekerr; |
887 |
< |
if (n = flen - lastpos) { /* file has grown */ |
887 |
> |
if ((n = flen - lastpos) > 0) { /* file has grown */ |
888 |
|
if (ambinp == NULL) { /* use duplicate filedes */ |
889 |
|
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
890 |
|
if (ambinp == NULL) |
891 |
|
error(SYSTEM, "fdopen failed in ambsync"); |
892 |
|
} |
893 |
< |
if (fseek(ambinp, lastpos, 0) < 0) |
893 |
> |
if (fseek(ambinp, lastpos, SEEK_SET) < 0) |
894 |
|
goto seekerr; |
895 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
896 |
|
if (!readambval(&avs, ambinp)) { |
897 |
|
sprintf(errmsg, |
898 |
< |
"ambient file corrupted near character %ld", |
899 |
< |
flen - n); |
898 |
> |
"ambient file \"%s\" corrupted near character %ld", |
899 |
> |
ambfile, flen - n); |
900 |
|
error(WARNING, errmsg); |
901 |
|
break; |
902 |
|
} |
903 |
|
avinsert(avstore(&avs)); |
904 |
|
n -= AMBVALSIZ; |
905 |
|
} |
906 |
+ |
lastpos = flen - n; |
907 |
|
/*** seek always as safety measure |
908 |
|
if (n) ***/ /* alignment */ |
909 |
< |
if (lseek(fileno(ambfp), flen-n, 0) < 0) |
909 |
> |
if (lseek(fileno(ambfp), (off_t)lastpos, SEEK_SET) < 0) |
910 |
|
goto seekerr; |
911 |
|
} |
781 |
– |
#ifdef DEBUG |
782 |
– |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
783 |
– |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
784 |
– |
ambfp->_ptr - ambfp->_base, |
785 |
– |
nunflshed*AMBVALSIZ); |
786 |
– |
error(CONSISTENCY, errmsg); |
787 |
– |
} |
788 |
– |
#endif |
789 |
– |
syncend: |
912 |
|
n = fflush(ambfp); /* calls write() at last */ |
913 |
< |
if ((lastpos = lseek(fileno(ambfp), 0L, 1)) < 0) |
913 |
> |
if (n != EOF) |
914 |
> |
lastpos += (long)nunflshed*AMBVALSIZ; |
915 |
> |
else if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
916 |
|
goto seekerr; |
917 |
+ |
|
918 |
|
aflock(F_UNLCK); /* release file */ |
919 |
|
nunflshed = 0; |
920 |
|
return(n); |
921 |
|
seekerr: |
922 |
|
error(SYSTEM, "seek failed in ambsync"); |
923 |
+ |
return -1; /* pro forma return */ |
924 |
|
} |
925 |
|
|
926 |
|
#else |
927 |
|
|
928 |
< |
int |
929 |
< |
ambsync() /* flush ambient file */ |
928 |
> |
extern int |
929 |
> |
ambsync(void) /* flush ambient file */ |
930 |
|
{ |
931 |
< |
if (nunflshed == 0) |
931 |
> |
if (ambfp == NULL) |
932 |
|
return(0); |
933 |
|
nunflshed = 0; |
934 |
|
return(fflush(ambfp)); |