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greg |
1.1 |
#ifndef lint |
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greg |
2.8 |
static const char RCSid[] = "$Id$"; |
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greg |
1.1 |
#endif |
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/* |
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* objset.c - routines for maintaining object sets. |
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* |
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greg |
2.8 |
* External symbols declared in object.h |
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*/ |
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greg |
2.9 |
#include "copyright.h" |
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greg |
1.1 |
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#include "standard.h" |
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#include "octree.h" |
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#include "object.h" |
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greg |
1.4 |
#ifndef OSTSIZ |
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greg |
2.11 |
#ifdef SMLMEM |
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#define OSTSIZ 32749 /* object table size (a prime!) */ |
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#else |
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gregl |
2.5 |
#define OSTSIZ 262139 /* object table size (a prime!) */ |
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greg |
1.8 |
#endif |
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greg |
1.4 |
#endif |
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greg |
1.1 |
|
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static OBJECT *ostable[OSTSIZ]; /* the object set table */ |
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greg |
2.8 |
void |
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greg |
1.1 |
insertelem(os, obj) /* insert obj into os, no questions */ |
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register OBJECT *os; |
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OBJECT obj; |
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{ |
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register int i; |
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for (i = os[0]++; i > 0; i--) |
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if (os[i] > obj) |
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os[i+1] = os[i]; |
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else |
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break; |
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os[i+1] = obj; |
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} |
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greg |
2.8 |
void |
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greg |
1.1 |
deletelem(os, obj) /* delete obj from os, no questions */ |
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register OBJECT *os; |
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OBJECT obj; |
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{ |
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register int i; |
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greg |
1.6 |
i = (*os)--; |
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os++; |
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while (i > 0 && *os < obj) { |
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i--; |
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os++; |
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} |
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greg |
1.1 |
while (--i > 0) { |
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os[0] = os[1]; |
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os++; |
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} |
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} |
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greg |
2.8 |
int |
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greg |
1.1 |
inset(os, obj) /* determine if object is in set */ |
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register OBJECT *os; |
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OBJECT obj; |
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{ |
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int upper, lower; |
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register int cm, i; |
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gwlarson |
2.7 |
if ((i = os[0]) <= 6) { /* linear search algorithm */ |
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cm = obj; |
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while (i-- > 0) |
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if (*++os == cm) |
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return(1); |
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return(0); |
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} |
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greg |
1.1 |
lower = 1; |
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gwlarson |
2.7 |
upper = cm = i + 1; |
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greg |
2.4 |
/* binary search algorithm */ |
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greg |
1.1 |
while ((i = (lower + upper) >> 1) != cm) { |
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cm = obj - os[i]; |
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if (cm > 0) |
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lower = i; |
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else if (cm < 0) |
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upper = i; |
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else |
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return(1); |
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cm = i; |
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} |
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return(0); |
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} |
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greg |
2.8 |
int |
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greg |
1.1 |
setequal(os1, os2) /* determine if two sets are equal */ |
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register OBJECT *os1, *os2; |
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{ |
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register int i; |
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for (i = *os1; i-- >= 0; ) |
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if (*os1++ != *os2++) |
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return(0); |
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return(1); |
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} |
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greg |
2.8 |
void |
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greg |
1.1 |
setcopy(os1, os2) /* copy object set os2 into os1 */ |
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register OBJECT *os1, *os2; |
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{ |
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register int i; |
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for (i = *os2; i-- >= 0; ) |
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*os1++ = *os2++; |
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} |
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greg |
2.4 |
OBJECT * |
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setsave(os) /* allocate space and save set */ |
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register OBJECT *os; |
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{ |
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OBJECT *osnew; |
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register OBJECT *oset; |
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register int i; |
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if ((osnew = oset = (OBJECT *)malloc((*os+1)*sizeof(OBJECT))) == NULL) |
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error(SYSTEM, "out of memory in setsave\n"); |
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for (i = *os; i-- >= 0; ) /* inline setcopy */ |
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*oset++ = *os++; |
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return(osnew); |
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} |
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greg |
2.8 |
void |
138 |
greg |
2.4 |
setunion(osr, os1, os2) /* osr = os1 Union os2 */ |
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register OBJECT *osr, *os1, *os2; |
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{ |
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register int i1, i2; |
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osr[0] = 0; |
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for (i1 = i2 = 1; i1 <= os1[0] || i2 <= os2[0]; ) { |
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while (i1 <= os1[0] && (i2 > os2[0] || os1[i1] <= os2[i2])) { |
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osr[++osr[0]] = os1[i1]; |
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if (i2 <= os2[0] && os2[i2] == os1[i1]) |
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i2++; |
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i1++; |
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} |
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while (i2 <= os2[0] && (i1 > os1[0] || os2[i2] < os1[i1])) |
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osr[++osr[0]] = os2[i2++]; |
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} |
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} |
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156 |
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greg |
2.8 |
void |
158 |
greg |
2.4 |
setintersect(osr, os1, os2) /* osr = os1 Intersect os2 */ |
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register OBJECT *osr, *os1, *os2; |
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{ |
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register int i1, i2; |
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osr[0] = 0; |
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if (os1[0] <= 0) |
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return; |
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for (i1 = i2 = 1; i2 <= os2[0]; ) { |
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while (os1[i1] < os2[i2]) |
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if (++i1 > os1[0]) |
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return; |
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while (os2[i2] < os1[i1]) |
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if (++i2 > os2[0]) |
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return; |
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if (os1[i1] == os2[i2]) |
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osr[++osr[0]] = os2[i2++]; |
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} |
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} |
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greg |
1.1 |
OCTREE |
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fullnode(oset) /* return octree for object set */ |
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OBJECT *oset; |
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{ |
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int osentry, ntries; |
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long hval; |
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OCTREE ot; |
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register int i; |
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register OBJECT *os; |
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/* hash on set */ |
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hval = 0; |
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os = oset; |
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i = *os++; |
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while (i-- > 0) |
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hval += *os++; |
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ntries = 0; |
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tryagain: |
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osentry = (hval + (long)ntries*ntries) % OSTSIZ; |
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os = ostable[osentry]; |
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if (os == NULL) { |
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os = ostable[osentry] = (OBJECT *)malloc( |
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(unsigned)(oset[0]+2)*sizeof(OBJECT)); |
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if (os == NULL) |
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goto memerr; |
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ot = oseti(osentry); |
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} else { |
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/* look for set */ |
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for (i = 0; *os > 0; i++, os += *os + 1) |
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if (setequal(os, oset)) |
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break; |
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ot = oseti(i*OSTSIZ + osentry); |
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if (*os > 0) /* found it */ |
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return(ot); |
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if (!isfull(ot)) /* entry overflow */ |
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if (++ntries < OSTSIZ) |
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goto tryagain; |
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else |
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error(INTERNAL, "hash table overflow in fullnode"); |
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/* remember position */ |
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i = os - ostable[osentry]; |
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os = ostable[osentry] = (OBJECT *)realloc( |
220 |
greg |
2.10 |
(void *)ostable[osentry], |
221 |
greg |
1.1 |
(unsigned)(i+oset[0]+2)*sizeof(OBJECT)); |
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if (os == NULL) |
223 |
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goto memerr; |
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os += i; /* last entry */ |
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} |
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setcopy(os, oset); /* add new set */ |
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os += *os + 1; |
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*os = 0; /* terminator */ |
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return(ot); |
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memerr: |
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error(SYSTEM, "out of memory in fullnode"); |
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} |
233 |
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234 |
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235 |
greg |
2.8 |
void |
236 |
greg |
1.1 |
objset(oset, ot) /* get object set for full node */ |
237 |
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register OBJECT *oset; |
238 |
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OCTREE ot; |
239 |
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{ |
240 |
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register OBJECT *os; |
241 |
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register int i; |
242 |
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243 |
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if (!isfull(ot)) |
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goto noderr; |
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gwlarson |
2.6 |
ot = oseti(ot); |
246 |
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if ((os = ostable[ot%OSTSIZ]) == NULL) |
247 |
greg |
1.1 |
goto noderr; |
248 |
gwlarson |
2.6 |
for (i = ot/OSTSIZ; i--; os += *os + 1) |
249 |
greg |
1.1 |
if (*os <= 0) |
250 |
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goto noderr; |
251 |
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for (i = *os; i-- >= 0; ) /* copy set here */ |
252 |
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*oset++ = *os++; |
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return; |
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noderr: |
255 |
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error(CONSISTENCY, "bad node in objset"); |
256 |
greg |
1.2 |
} |
257 |
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258 |
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259 |
greg |
2.4 |
int |
260 |
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dosets(f) /* loop through all sets */ |
261 |
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int (*f)(); |
262 |
greg |
1.2 |
{ |
263 |
greg |
2.4 |
int res = 0; |
264 |
greg |
1.2 |
int n; |
265 |
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register OBJECT *os; |
266 |
greg |
1.3 |
|
267 |
greg |
1.2 |
for (n = 0; n < OSTSIZ; n++) { |
268 |
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if ((os = ostable[n]) == NULL) |
269 |
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continue; |
270 |
greg |
2.4 |
while (*os > 0) { |
271 |
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res += (*f)(os); |
272 |
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os += *os + 1; |
273 |
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} |
274 |
greg |
1.2 |
} |
275 |
greg |
2.4 |
return(res); |
276 |
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} |
277 |
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278 |
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279 |
greg |
2.8 |
void |
280 |
greg |
2.4 |
donesets() /* free ALL SETS in our table */ |
281 |
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{ |
282 |
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register int n; |
283 |
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284 |
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for (n = 0; n < OSTSIZ; n++) |
285 |
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if (ostable[n] != NULL) { |
286 |
greg |
2.8 |
free((void *)ostable[n]); |
287 |
greg |
2.4 |
ostable[n] = NULL; |
288 |
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} |
289 |
greg |
1.1 |
} |