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* Table lookup routines |
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*/ |
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|
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– |
#include "copyright.h" |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "lookup.h" |
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|
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#ifdef NOSTRUCTASS |
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#define copystruct(d,s) memcpy((void *)(d),(void *)(s),sizeof(*(d))) |
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#else |
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#define copystruct(d,s) (*(d) = *(s)) |
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– |
#endif |
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|
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– |
|
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int |
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< |
lu_init(tbl, nel) /* initialize tbl for at least nel elements */ |
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< |
register LUTAB *tbl; |
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< |
int nel; |
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> |
lu_init( /* initialize tbl for at least nel elements */ |
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> |
LUTAB *tbl, |
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> |
int nel |
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> |
) |
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{ |
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static int hsiztab[] = { |
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31, 61, 127, 251, 509, 1021, 2039, 4093, 8191, 16381, |
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32749, 65521, 131071, 262139, 524287, 1048573, 2097143, |
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4194301, 8388593, 0 |
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}; |
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< |
register int *hsp; |
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> |
int *hsp; |
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|
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nel += nel>>1; /* 66% occupancy */ |
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for (hsp = hsiztab; *hsp; hsp++) |
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|
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unsigned long |
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< |
lu_shash(s) /* hash a nul-terminated string */ |
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< |
char *s; |
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> |
lu_shash( /* hash a nul-terminated string */ |
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> |
const char *s |
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> |
) |
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{ |
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static unsigned char shuffle[256] = { |
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0, 157, 58, 215, 116, 17, 174, 75, 232, 133, 34, |
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106, 7, 164, 65, 222, 123, 24, 181, 82, 239, 140, |
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41, 198, 99 |
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}; |
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< |
register int i = 0; |
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< |
register unsigned long h = 0; |
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< |
register unsigned char *t = (unsigned char *)s; |
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> |
int i = 0; |
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> |
unsigned long h = 0; |
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> |
unsigned const char *t = (unsigned const char *)s; |
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|
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while (*t) |
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h ^= (unsigned long)shuffle[*t++] << ((i+=11) & 0xf); |
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|
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LUENT * |
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< |
lu_find(tbl, key) /* find a table entry */ |
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< |
register LUTAB *tbl; |
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< |
char *key; |
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> |
lu_find( /* find a table entry */ |
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> |
LUTAB *tbl, |
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> |
const char *key |
| 88 |
> |
) |
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{ |
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unsigned long hval; |
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int i, n; |
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< |
register int ndx; |
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< |
register LUENT *le; |
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> |
int ndx; |
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> |
LUENT *le; |
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/* look up object */ |
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if (tbl->tsiz == 0 && !lu_init(tbl, 1)) |
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return(NULL); |
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* recursive call to lu_find(). |
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*/ |
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while (ndx--) |
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< |
if (le[ndx].key != NULL) |
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> |
if (le[ndx].key != NULL) { |
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if (le[ndx].data != NULL) |
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< |
copystruct(lu_find(tbl,le[ndx].key), &le[ndx]); |
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> |
*lu_find(tbl,le[ndx].key) = le[ndx]; |
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else if (tbl->freek != NULL) |
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(*tbl->freek)(le[ndx].key); |
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+ |
} |
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free((void *)le); |
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goto tryagain; /* should happen only once! */ |
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} |
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|
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|
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void |
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< |
lu_delete(tbl, key) /* delete a table entry */ |
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< |
register LUTAB *tbl; |
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< |
char *key; |
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> |
lu_delete( /* delete a table entry */ |
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> |
LUTAB *tbl, |
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> |
const char *key |
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> |
) |
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{ |
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< |
register LUENT *le; |
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> |
LUENT *le; |
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|
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if ((le = lu_find(tbl, key)) == NULL) |
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return; |
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|
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|
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int |
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< |
lu_doall(tbl, f) /* loop through all valid table entries */ |
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< |
register LUTAB *tbl; |
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< |
int (*f)(); |
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> |
lu_doall( /* loop through all valid table entries */ |
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> |
const LUTAB *tbl, |
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> |
/* int (*f)(const LUENT *, void *) */ |
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> |
lut_doallf_t *f, |
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> |
void *p |
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> |
) |
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{ |
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int rval = 0; |
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< |
register LUENT *tp; |
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> |
const LUENT *tp; |
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|
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for (tp = tbl->tabl + tbl->tsiz; tp-- > tbl->tabl; ) |
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< |
if (tp->data != NULL) |
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< |
if (f != NULL) |
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< |
rval += (*f)(tp); |
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< |
else |
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> |
if (tp->data != NULL) { |
| 172 |
> |
if (f != NULL) { |
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> |
int r = (*f)(tp, p); |
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> |
if (r < 0) |
| 175 |
> |
return(-1); |
| 176 |
> |
rval += r; |
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> |
} else |
| 178 |
|
rval++; |
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+ |
} |
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return(rval); |
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|
} |
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|
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|
| 184 |
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void |
| 185 |
< |
lu_done(tbl) /* free table and contents */ |
| 186 |
< |
register LUTAB *tbl; |
| 185 |
> |
lu_done( /* free table and contents */ |
| 186 |
> |
LUTAB *tbl |
| 187 |
> |
) |
| 188 |
|
{ |
| 189 |
< |
register LUENT *tp; |
| 189 |
> |
LUENT *tp; |
| 190 |
|
|
| 191 |
|
if (!tbl->tsiz) |
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return; |
