1 |
greg |
1.1 |
/* Copyright (c) 1986 Regents of the University of California */ |
2 |
|
|
|
3 |
|
|
#ifndef lint |
4 |
|
|
static char SCCSid[] = "$SunId$ LBL"; |
5 |
|
|
#endif |
6 |
|
|
|
7 |
|
|
/* |
8 |
|
|
* otypes.c - object lookup functions. |
9 |
|
|
* |
10 |
|
|
* 7/29/85 |
11 |
|
|
*/ |
12 |
|
|
|
13 |
|
|
#include "standard.h" |
14 |
|
|
|
15 |
|
|
#include "object.h" |
16 |
|
|
|
17 |
|
|
#include "otypes.h" |
18 |
|
|
|
19 |
|
|
|
20 |
greg |
1.4 |
extern int (*addobjnotify[])(); /* people to notify of new objects */ |
21 |
|
|
|
22 |
greg |
1.1 |
FUN ofun[NUMOTYPE] = INIT_OTYPE; /* our object function table */ |
23 |
|
|
|
24 |
|
|
static struct ohtab { |
25 |
|
|
int hsiz; /* current table size */ |
26 |
|
|
OBJECT *htab; /* table, if allocated */ |
27 |
|
|
} modtab = {100, NULL}, objtab = {1000, NULL}; /* modifiers and objects */ |
28 |
|
|
|
29 |
|
|
|
30 |
|
|
int |
31 |
|
|
otype(ofname) /* get object function number from its name */ |
32 |
|
|
register char *ofname; |
33 |
|
|
{ |
34 |
|
|
register int i; |
35 |
|
|
|
36 |
|
|
for (i = 0; i < NUMOTYPE; i++) |
37 |
|
|
if (!strcmp(ofun[i].funame, ofname)) |
38 |
|
|
return(i); |
39 |
|
|
|
40 |
|
|
return(-1); /* not found */ |
41 |
|
|
} |
42 |
|
|
|
43 |
|
|
|
44 |
|
|
#ifdef GETOBJ |
45 |
|
|
int |
46 |
|
|
object(oname) /* get an object number from its name */ |
47 |
|
|
char *oname; |
48 |
|
|
{ |
49 |
|
|
register int ndx; |
50 |
|
|
|
51 |
|
|
ndx = otndx(oname, &objtab); |
52 |
|
|
return(objtab.htab[ndx]); |
53 |
|
|
} |
54 |
|
|
#endif |
55 |
|
|
|
56 |
|
|
|
57 |
|
|
int |
58 |
|
|
modifier(mname) /* get a modifier number from its name */ |
59 |
|
|
char *mname; |
60 |
|
|
{ |
61 |
|
|
register int ndx; |
62 |
|
|
|
63 |
|
|
ndx = otndx(mname, &modtab); |
64 |
|
|
return(modtab.htab[ndx]); |
65 |
|
|
} |
66 |
|
|
|
67 |
|
|
|
68 |
|
|
insertobject(obj) /* insert new object into our list */ |
69 |
|
|
register OBJECT obj; |
70 |
|
|
{ |
71 |
greg |
1.4 |
register int i; |
72 |
greg |
1.1 |
|
73 |
|
|
#ifdef GETOBJ |
74 |
greg |
1.4 |
i = otndx(objptr(obj)->oname, &objtab); |
75 |
|
|
objtab.htab[i] = obj; |
76 |
greg |
1.1 |
#endif |
77 |
|
|
if (ismodifier(objptr(obj)->otype)) { |
78 |
greg |
1.4 |
i = otndx(objptr(obj)->oname, &modtab); |
79 |
|
|
modtab.htab[i] = obj; |
80 |
greg |
1.1 |
} |
81 |
greg |
1.4 |
for (i = 0; addobjnotify[i] != NULL; i++) |
82 |
|
|
(*addobjnotify[i])(obj); |
83 |
greg |
1.1 |
} |
84 |
|
|
|
85 |
|
|
|
86 |
|
|
objerror(o, etyp, msg) /* report error related to object */ |
87 |
|
|
OBJREC *o; |
88 |
|
|
int etyp; |
89 |
|
|
char *msg; |
90 |
|
|
{ |
91 |
|
|
char msgbuf[128]; |
92 |
|
|
|
93 |
|
|
sprintf(msgbuf, "%s for %s \"%s\"", |
94 |
|
|
msg, ofun[o->otype].funame, o->oname); |
95 |
|
|
error(etyp, msgbuf); |
96 |
|
|
} |
97 |
|
|
|
98 |
|
|
|
99 |
|
|
static int |
100 |
|
|
nexthsiz(oldsiz) /* return next hash table size */ |
101 |
|
|
int oldsiz; |
102 |
|
|
{ |
103 |
|
|
static int hsiztab[] = { |
104 |
|
|
251, 509, 1021, 2039, 4093, 8191, 16381, 0 |
105 |
|
|
}; |
106 |
|
|
register int *hsp; |
107 |
|
|
|
108 |
|
|
for (hsp = hsiztab; *hsp; hsp++) |
109 |
|
|
if (*hsp > oldsiz) |
110 |
|
|
return(*hsp); |
111 |
|
|
return(oldsiz*2 + 1); /* not always prime */ |
112 |
|
|
} |
113 |
|
|
|
114 |
|
|
|
115 |
|
|
static int |
116 |
|
|
shash(s) /* hash a string */ |
117 |
|
|
register char *s; |
118 |
|
|
{ |
119 |
|
|
register int h = 0; |
120 |
|
|
|
121 |
|
|
while (*s) |
122 |
|
|
h = (h<<1 & 0x7fff) ^ *s++; |
123 |
|
|
return(h); |
124 |
|
|
} |
125 |
|
|
|
126 |
|
|
|
127 |
|
|
static int |
128 |
|
|
otndx(name, tab) /* get object table index for name */ |
129 |
|
|
char *name; |
130 |
|
|
register struct ohtab *tab; |
131 |
|
|
{ |
132 |
|
|
OBJECT *oldhtab; |
133 |
|
|
int hval, i; |
134 |
|
|
register int ndx; |
135 |
|
|
|
136 |
|
|
if (tab->htab == NULL) { /* new table */ |
137 |
|
|
tab->hsiz = nexthsiz(tab->hsiz); |
138 |
|
|
tab->htab = (OBJECT *)malloc(tab->hsiz*sizeof(OBJECT)); |
139 |
|
|
if (tab->htab == NULL) |
140 |
greg |
1.2 |
error(SYSTEM, "out of memory in otndx"); |
141 |
greg |
1.1 |
ndx = tab->hsiz; |
142 |
|
|
while (ndx--) /* empty it */ |
143 |
|
|
tab->htab[ndx] = OVOID; |
144 |
|
|
} |
145 |
|
|
/* look up object */ |
146 |
|
|
hval = shash(name); |
147 |
greg |
1.3 |
tryagain: |
148 |
greg |
1.1 |
for (i = 0; i < tab->hsiz; i++) { |
149 |
|
|
ndx = (hval + i*i) % tab->hsiz; |
150 |
|
|
if (tab->htab[ndx] == OVOID || |
151 |
|
|
!strcmp(objptr(tab->htab[ndx])->oname, name)) |
152 |
|
|
return(ndx); |
153 |
|
|
} |
154 |
|
|
/* table is full, reallocate */ |
155 |
|
|
oldhtab = tab->htab; |
156 |
|
|
ndx = tab->hsiz; |
157 |
|
|
tab->htab = NULL; |
158 |
|
|
while (ndx--) |
159 |
|
|
if (oldhtab[ndx] != OVOID) { |
160 |
|
|
i = otndx(objptr(oldhtab[ndx])->oname, tab); |
161 |
|
|
tab->htab[i] = oldhtab[ndx]; |
162 |
|
|
} |
163 |
|
|
free((char *)oldhtab); |
164 |
greg |
1.3 |
goto tryagain; /* should happen only once! */ |
165 |
greg |
1.1 |
} |