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greg |
1.1 |
#ifndef lint |
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greg |
2.13 |
static const char RCSid[] = "$Id: modobject.c,v 2.12 2004/07/14 02:37:23 greg Exp $"; |
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greg |
1.1 |
#endif |
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/* |
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* Routines for tracking object modifiers |
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greg |
2.7 |
* |
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* External symbols declared in object.h |
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*/ |
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greg |
2.8 |
#include "copyright.h" |
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greg |
1.1 |
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#include "standard.h" |
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#include "object.h" |
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1.2 |
#include "otypes.h" |
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greg |
1.1 |
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static struct ohtab { |
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int hsiz; /* current table size */ |
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OBJECT *htab; /* table, if allocated */ |
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} modtab = {100, NULL}, objtab = {1000, NULL}; /* modifiers and objects */ |
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schorsch |
2.10 |
static int otndx(char *, struct ohtab *); |
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greg |
1.3 |
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greg |
1.1 |
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greg |
2.9 |
OBJECT |
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greg |
2.13 |
objndx( /* get object number from pointer */ |
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OBJREC *op |
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) |
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greg |
1.1 |
{ |
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greg |
2.13 |
int i, j; |
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greg |
1.1 |
|
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gwlarson |
2.6 |
for (i = nobjects>>OBJBLKSHFT; i >= 0; i--) { |
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greg |
2.3 |
j = op - objblock[i]; |
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greg |
2.12 |
if ((j >= 0) & (j < OBJBLKSIZ)) |
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gwlarson |
2.6 |
return((i<<OBJBLKSHFT) + j); |
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greg |
2.3 |
} |
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return(OVOID); |
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greg |
1.1 |
} |
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greg |
2.9 |
OBJECT |
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greg |
2.13 |
lastmod( /* find modifier definition before obj */ |
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OBJECT obj, |
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char *mname |
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) |
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greg |
2.3 |
{ |
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greg |
2.13 |
OBJREC *op; |
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int i; |
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greg |
2.3 |
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greg |
2.4 |
i = modifier(mname); /* try hash table first */ |
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greg |
2.12 |
if ((obj == OVOID) | (i < obj)) |
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greg |
2.4 |
return(i); |
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for (i = obj; i-- > 0; ) { /* need to search */ |
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greg |
2.3 |
op = objptr(i); |
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greg |
2.13 |
if (ismodifier(op->otype) && op->oname[0] == mname[0] && |
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!strcmp(op->oname, mname)) |
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greg |
2.3 |
return(i); |
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} |
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return(OVOID); |
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} |
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greg |
2.9 |
OBJECT |
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greg |
2.13 |
modifier( /* get a modifier number from its name */ |
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char *mname |
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) |
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greg |
1.1 |
{ |
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greg |
2.13 |
int ndx; |
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greg |
1.1 |
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ndx = otndx(mname, &modtab); |
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return(modtab.htab[ndx]); |
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} |
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greg |
2.3 |
#ifdef GETOBJ |
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greg |
2.9 |
OBJECT |
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greg |
2.13 |
object( /* get an object number from its name */ |
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char *oname |
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) |
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greg |
2.3 |
{ |
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greg |
2.13 |
int ndx; |
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greg |
2.3 |
|
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ndx = otndx(oname, &objtab); |
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return(objtab.htab[ndx]); |
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} |
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#endif |
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greg |
2.7 |
void |
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greg |
2.13 |
insertobject( /* insert new object into our list */ |
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OBJECT obj |
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) |
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greg |
1.1 |
{ |
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greg |
2.13 |
int i; |
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greg |
1.1 |
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if (ismodifier(objptr(obj)->otype)) { |
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i = otndx(objptr(obj)->oname, &modtab); |
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modtab.htab[i] = obj; |
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} |
102 |
greg |
2.3 |
#ifdef GETOBJ |
103 |
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else { |
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i = otndx(objptr(obj)->oname, &objtab); |
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objtab.htab[i] = obj; |
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} |
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#endif |
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greg |
1.1 |
for (i = 0; addobjnotify[i] != NULL; i++) |
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(*addobjnotify[i])(obj); |
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} |
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113 |
greg |
2.7 |
void |
114 |
greg |
2.13 |
clearobjndx(void) /* clear object hash tables */ |
115 |
greg |
2.7 |
{ |
116 |
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if (modtab.htab != NULL) { |
117 |
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free((void *)modtab.htab); |
118 |
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modtab.htab = NULL; |
119 |
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modtab.hsiz = 100; |
120 |
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} |
121 |
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if (objtab.htab != NULL) { |
122 |
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free((void *)objtab.htab); |
123 |
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objtab.htab = NULL; |
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objtab.hsiz = 100; |
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} |
126 |
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} |
127 |
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128 |
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129 |
greg |
1.1 |
static int |
130 |
greg |
2.13 |
nexthsiz( /* return next hash table size */ |
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int oldsiz |
132 |
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) |
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greg |
1.1 |
{ |
134 |
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static int hsiztab[] = { |
135 |
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251, 509, 1021, 2039, 4093, 8191, 16381, 0 |
136 |
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}; |
137 |
greg |
2.13 |
int *hsp; |
138 |
greg |
1.1 |
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for (hsp = hsiztab; *hsp; hsp++) |
140 |
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if (*hsp > oldsiz) |
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return(*hsp); |
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return(oldsiz*2 + 1); /* not always prime */ |
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} |
144 |
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145 |
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146 |
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static int |
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greg |
2.13 |
otndx( /* get object table index for name */ |
148 |
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char *name, |
149 |
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struct ohtab *tab |
150 |
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) |
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greg |
1.1 |
{ |
152 |
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OBJECT *oldhtab; |
153 |
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int hval, i; |
154 |
greg |
2.13 |
int ndx; |
155 |
greg |
1.1 |
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156 |
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if (tab->htab == NULL) { /* new table */ |
157 |
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tab->hsiz = nexthsiz(tab->hsiz); |
158 |
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tab->htab = (OBJECT *)malloc(tab->hsiz*sizeof(OBJECT)); |
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if (tab->htab == NULL) |
160 |
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error(SYSTEM, "out of memory in otndx"); |
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ndx = tab->hsiz; |
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while (ndx--) /* empty it */ |
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tab->htab[ndx] = OVOID; |
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} |
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/* look up object */ |
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hval = shash(name); |
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tryagain: |
168 |
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for (i = 0; i < tab->hsiz; i++) { |
169 |
greg |
2.11 |
ndx = (hval + (unsigned long)i*i) % tab->hsiz; |
170 |
greg |
1.1 |
if (tab->htab[ndx] == OVOID || |
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!strcmp(objptr(tab->htab[ndx])->oname, name)) |
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return(ndx); |
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} |
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/* table is full, reallocate */ |
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oldhtab = tab->htab; |
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ndx = tab->hsiz; |
177 |
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tab->htab = NULL; |
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while (ndx--) |
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if (oldhtab[ndx] != OVOID) { |
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i = otndx(objptr(oldhtab[ndx])->oname, tab); |
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tab->htab[i] = oldhtab[ndx]; |
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} |
183 |
greg |
2.7 |
free((void *)oldhtab); |
184 |
greg |
1.1 |
goto tryagain; /* should happen only once! */ |
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} |