| 172 |
|
char *op; |
| 173 |
|
unsigned n; |
| 174 |
|
{ |
| 175 |
– |
extern char *memcpy(); |
| 175 |
|
register char *p; |
| 176 |
|
register unsigned on; |
| 177 |
|
|
| 178 |
< |
free(op); /* free it first */ |
| 179 |
< |
p = malloc(n); /* p==op if same bucket */ |
| 180 |
< |
if (p == NULL) |
| 181 |
< |
return(NULL); |
| 182 |
< |
if (p != op) /* different bucket, do copy */ |
| 178 |
> |
if (op != NULL) |
| 179 |
> |
on = 1 << ((M_HEAD *)op-1)->bucket; |
| 180 |
> |
else |
| 181 |
> |
on = 0; |
| 182 |
> |
if (n <= on && n > on>>1) |
| 183 |
> |
return(op); /* same bucket */ |
| 184 |
> |
p = malloc(n); |
| 185 |
> |
if (p != NULL) |
| 186 |
|
#ifdef BSD |
| 187 |
|
bcopy(op, p, n>on ? on : n); |
| 188 |
|
#else |
| 189 |
|
(void)memcpy(p, op, n>on ? on : n); |
| 190 |
|
#endif |
| 191 |
+ |
free(op); |
| 192 |
|
return(p); |
| 193 |
|
} |
| 194 |
|
|
