1 |
– |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
2 |
– |
|
1 |
|
#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ SGI"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
6 |
– |
|
4 |
|
/* |
5 |
|
* Table lookup routines |
6 |
|
*/ |
7 |
|
|
8 |
|
#include <stdio.h> |
9 |
+ |
#include <stdlib.h> |
10 |
+ |
|
11 |
|
#include "lookup.h" |
12 |
|
|
13 |
< |
#define MEM_PTR char * |
13 |
> |
extern int |
14 |
> |
lu_strcmp( |
15 |
> |
const void *s1, |
16 |
> |
const void *s2 |
17 |
> |
) |
18 |
> |
{ |
19 |
> |
return strcmp((const char*)s1,(const char*)s2); |
20 |
> |
} |
21 |
|
|
22 |
< |
extern MEM_PTR calloc(); |
23 |
< |
|
24 |
< |
|
25 |
< |
int |
26 |
< |
lu_init(tbl, nel) /* initialize tbl for at least nel elements */ |
21 |
< |
register LUTAB *tbl; |
22 |
< |
int nel; |
22 |
> |
extern int |
23 |
> |
lu_init( /* initialize tbl for at least nel elements */ |
24 |
> |
register LUTAB *tbl, |
25 |
> |
int nel |
26 |
> |
) |
27 |
|
{ |
28 |
|
static int hsiztab[] = { |
29 |
|
31, 61, 127, 251, 509, 1021, 2039, 4093, 8191, 16381, |
46 |
|
} |
47 |
|
|
48 |
|
|
49 |
< |
long |
50 |
< |
lu_shash(s) /* hash a nul-terminated string */ |
51 |
< |
char *s; |
49 |
> |
extern unsigned long |
50 |
> |
lu_shash( /* hash a nul-terminated string */ |
51 |
> |
const void *s |
52 |
> |
) |
53 |
|
{ |
54 |
|
static unsigned char shuffle[256] = { |
55 |
|
0, 157, 58, 215, 116, 17, 174, 75, 232, 133, 34, |
78 |
|
41, 198, 99 |
79 |
|
}; |
80 |
|
register int i = 0; |
81 |
< |
register long h = 0; |
82 |
< |
register unsigned char *t = (unsigned char *)s; |
81 |
> |
register unsigned long h = 0; |
82 |
> |
register unsigned const char *t = (unsigned const char *)s; |
83 |
|
|
84 |
|
while (*t) |
85 |
< |
h ^= (long)shuffle[*t++] << ((i+=11) & 0xf); |
85 |
> |
h ^= (unsigned long)shuffle[*t++] << ((i+=11) & 0xf); |
86 |
|
|
87 |
|
return(h); |
88 |
|
} |
89 |
|
|
90 |
|
|
91 |
< |
LUENT * |
92 |
< |
lu_find(tbl, key) /* find a table entry */ |
93 |
< |
register LUTAB *tbl; |
94 |
< |
char *key; |
91 |
> |
extern LUENT * |
92 |
> |
lu_find( /* find a table entry */ |
93 |
> |
register LUTAB *tbl, |
94 |
> |
const char *key |
95 |
> |
) |
96 |
|
{ |
97 |
< |
long hval; |
97 |
> |
unsigned long hval; |
98 |
|
int i, n; |
99 |
|
register int ndx; |
100 |
|
register LUENT *le; |
101 |
|
/* look up object */ |
102 |
< |
if (tbl->tsiz == 0) |
103 |
< |
lu_init(tbl, 1); |
102 |
> |
if (tbl->tsiz == 0 && !lu_init(tbl, 1)) |
103 |
> |
return(NULL); |
104 |
|
hval = (*tbl->hashf)(key); |
105 |
|
tryagain: |
106 |
|
ndx = hval % tbl->tsiz; |
101 |
– |
le = &tbl->tabl[ndx]; |
107 |
|
for (i = 0, n = 1; i < tbl->tsiz; i++, n += 2) { |
108 |
+ |
le = &tbl->tabl[ndx]; |
109 |
|
if (le->key == NULL) { |
110 |
|
le->hval = hval; |
111 |
|
return(le); |
114 |
|
(tbl->keycmp == NULL || !(*tbl->keycmp)(le->key, key))) { |
115 |
|
return(le); |
116 |
|
} |
117 |
< |
le += n; |
112 |
< |
if ((ndx += n) >= tbl->tsiz) { /* this happens rarely */ |
117 |
> |
if ((ndx += n) >= tbl->tsiz) /* this happens rarely */ |
118 |
|
ndx = ndx % tbl->tsiz; |
114 |
– |
le = &tbl->tabl[ndx]; |
115 |
– |
} |
119 |
|
} |
120 |
|
/* table is full, reallocate */ |
121 |
|
le = tbl->tabl; |
127 |
|
tbl->ndel = i; |
128 |
|
return(NULL); |
129 |
|
} |
127 |
– |
if (!ndx) |
128 |
– |
goto tryagain; |
130 |
|
/* |
131 |
|
* The following code may fail if the user has reclaimed many |
132 |
|
* deleted entries and the system runs out of memory in a |
133 |
|
* recursive call to lu_find(). |
134 |
|
*/ |
135 |
|
while (ndx--) |
136 |
< |
if (le[ndx].key != NULL) |
136 |
> |
if (le[ndx].key != NULL) { |
137 |
|
if (le[ndx].data != NULL) |
138 |
< |
*lu_find(tbl, le[ndx].key) = le[ndx]; |
138 |
> |
*lu_find(tbl,le[ndx].key) = le[ndx]; |
139 |
|
else if (tbl->freek != NULL) |
140 |
|
(*tbl->freek)(le[ndx].key); |
141 |
< |
free((MEM_PTR)le); |
141 |
> |
} |
142 |
> |
free((void *)le); |
143 |
|
goto tryagain; /* should happen only once! */ |
144 |
|
} |
145 |
|
|
146 |
|
|
147 |
< |
void |
148 |
< |
lu_delete(tbl, key) /* delete a table entry */ |
149 |
< |
register LUTAB *tbl; |
150 |
< |
char *key; |
147 |
> |
extern void |
148 |
> |
lu_delete( /* delete a table entry */ |
149 |
> |
register LUTAB *tbl, |
150 |
> |
const char *key |
151 |
> |
) |
152 |
|
{ |
153 |
|
register LUENT *le; |
154 |
|
|
163 |
|
} |
164 |
|
|
165 |
|
|
166 |
< |
int |
167 |
< |
lu_doall(tbl, f) /* loop through all valid table entries */ |
168 |
< |
register LUTAB *tbl; |
169 |
< |
int (*f)(); |
166 |
> |
extern int |
167 |
> |
lu_doall( /* loop through all valid table entries */ |
168 |
> |
register const LUTAB *tbl, |
169 |
> |
//int (*f)(const LUENT *) |
170 |
> |
lut_doallf_t *f, |
171 |
> |
void *p |
172 |
> |
) |
173 |
|
{ |
174 |
|
int rval = 0; |
175 |
< |
register LUENT *tp; |
175 |
> |
register const LUENT *tp; |
176 |
|
|
177 |
|
for (tp = tbl->tabl + tbl->tsiz; tp-- > tbl->tabl; ) |
178 |
< |
if (tp->data != NULL) |
179 |
< |
if (f != NULL) |
180 |
< |
rval += (*f)(tp); |
181 |
< |
else |
178 |
> |
if (tp->data != NULL) { |
179 |
> |
if (f != NULL) { |
180 |
> |
int r = (*f)(tp, p); |
181 |
> |
if (r < 0) |
182 |
> |
return(-1); |
183 |
> |
rval += r; |
184 |
> |
} else |
185 |
|
rval++; |
186 |
+ |
} |
187 |
|
return(rval); |
188 |
|
} |
189 |
|
|
190 |
|
|
191 |
< |
void |
192 |
< |
lu_done(tbl) /* free table and contents */ |
193 |
< |
register LUTAB *tbl; |
191 |
> |
extern void |
192 |
> |
lu_done( /* free table and contents */ |
193 |
> |
register LUTAB *tbl |
194 |
> |
) |
195 |
|
{ |
196 |
|
register LUENT *tp; |
197 |
|
|
204 |
|
if (tp->data != NULL && tbl->freed != NULL) |
205 |
|
(*tbl->freed)(tp->data); |
206 |
|
} |
207 |
< |
free((MEM_PTR)tbl->tabl); |
207 |
> |
free((void *)tbl->tabl); |
208 |
|
tbl->tabl = NULL; |
209 |
|
tbl->tsiz = 0; |
210 |
|
tbl->ndel = 0; |