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/* Copyright (c) 1986 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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* Routines for tracking object modifiers |
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* |
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* External symbols declared in object.h |
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*/ |
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#include "copyright.h" |
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#include "standard.h" |
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#include "object.h" |
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#include "otypes.h" |
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extern int (*addobjnotify[])(); /* people to notify of new objects */ |
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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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static int otndx(char *, struct ohtab *); |
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#ifdef GETOBJ |
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int |
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object(oname) /* get an object number from its name */ |
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char *oname; |
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|
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OBJECT |
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objndx(op) /* get object number from pointer */ |
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register OBJREC *op; |
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{ |
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register int ndx; |
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register int i, j; |
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ndx = otndx(oname, &objtab); |
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return(objtab.htab[ndx]); |
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for (i = nobjects>>OBJBLKSHFT; i >= 0; i--) { |
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j = op - objblock[i]; |
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if (j >= 0 && j < OBJBLKSIZ) |
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return((i<<OBJBLKSHFT) + j); |
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} |
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return(OVOID); |
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} |
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#endif |
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int |
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OBJECT |
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lastmod(obj, mname) /* 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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register OBJREC *op; |
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register int i; |
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|
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i = modifier(mname); /* try hash table first */ |
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if (i < obj) |
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return(i); |
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for (i = obj; i-- > 0; ) { /* need to search */ |
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op = objptr(i); |
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if (ismodifier(op->otype) && !strcmp(op->oname, mname)) |
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return(i); |
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} |
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return(OVOID); |
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} |
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|
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|
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OBJECT |
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modifier(mname) /* get a modifier number from its name */ |
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char *mname; |
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{ |
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} |
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#ifdef GETOBJ |
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OBJECT |
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object(oname) /* get an object number from its name */ |
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char *oname; |
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{ |
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register int ndx; |
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|
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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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|
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|
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void |
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insertobject(obj) /* insert new object into our list */ |
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register OBJECT obj; |
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{ |
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register int i; |
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#ifdef GETOBJ |
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i = otndx(objptr(obj)->oname, &objtab); |
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objtab.htab[i] = obj; |
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#endif |
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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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} |
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#ifdef GETOBJ |
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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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for (i = 0; addobjnotify[i] != NULL; i++) |
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(*addobjnotify[i])(obj); |
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} |
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void |
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clearobjndx() /* clear object hash tables */ |
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{ |
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if (modtab.htab != NULL) { |
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free((void *)modtab.htab); |
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modtab.htab = NULL; |
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modtab.hsiz = 100; |
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} |
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if (objtab.htab != NULL) { |
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free((void *)objtab.htab); |
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objtab.htab = NULL; |
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objtab.hsiz = 100; |
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} |
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} |
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static int |
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nexthsiz(oldsiz) /* return next hash table size */ |
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int oldsiz; |
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static int |
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shash(s) /* hash a string */ |
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register char *s; |
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{ |
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register int h = 0; |
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|
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while (*s) |
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h = (h<<1 & 0x7fff) ^ *s++; |
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return(h); |
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} |
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static int |
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otndx(name, tab) /* get object table index for name */ |
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char *name; |
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register struct ohtab *tab; |
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hval = shash(name); |
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tryagain: |
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for (i = 0; i < tab->hsiz; i++) { |
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ndx = (hval + i*i) % tab->hsiz; |
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ndx = (hval + (unsigned long)i*i) % tab->hsiz; |
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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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i = otndx(objptr(oldhtab[ndx])->oname, tab); |
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tab->htab[i] = oldhtab[ndx]; |
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} |
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free((char *)oldhtab); |
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free((void *)oldhtab); |
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goto tryagain; /* should happen only once! */ |
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} |
