| 1 |
greg |
2.2 |
/* Copyright (c) 1993 Regents of the University of California */
|
| 2 |
greg |
1.1 |
|
| 3 |
|
|
#ifndef lint
|
| 4 |
|
|
static char SCCSid[] = "$SunId$ LBL";
|
| 5 |
|
|
#endif
|
| 6 |
|
|
|
| 7 |
|
|
/*
|
| 8 |
greg |
2.2 |
* Save unshared strings, packing them together into
|
| 9 |
|
|
* large blocks to optimize paging in VM environments.
|
| 10 |
greg |
1.1 |
*/
|
| 11 |
|
|
|
| 12 |
|
|
#define NULL 0
|
| 13 |
|
|
|
| 14 |
greg |
2.2 |
#ifdef BIGMEM
|
| 15 |
|
|
#ifndef MINBLOCK
|
| 16 |
|
|
#define MINBLOCK (1<<12) /* minimum allocation block size */
|
| 17 |
|
|
#endif
|
| 18 |
|
|
#ifndef MAXBLOCK
|
| 19 |
|
|
#define MAXBLOCK (1<<16) /* maximum allocation block size */
|
| 20 |
|
|
#endif
|
| 21 |
|
|
#else
|
| 22 |
|
|
#ifndef MINBLOCK
|
| 23 |
|
|
#define MINBLOCK (1<<10) /* minimum allocation block size */
|
| 24 |
|
|
#endif
|
| 25 |
|
|
#ifndef MAXBLOCK
|
| 26 |
|
|
#define MAXBLOCK (1<<14) /* maximum allocation block size */
|
| 27 |
|
|
#endif
|
| 28 |
|
|
#endif
|
| 29 |
greg |
1.1 |
|
| 30 |
greg |
2.2 |
extern char *bmalloc();
|
| 31 |
greg |
1.1 |
|
| 32 |
greg |
2.2 |
|
| 33 |
greg |
1.1 |
char *
|
| 34 |
|
|
savqstr(s) /* save a private string */
|
| 35 |
greg |
2.2 |
register char *s;
|
| 36 |
greg |
1.1 |
{
|
| 37 |
greg |
2.2 |
static char *curp = NULL; /* allocated memory pointer */
|
| 38 |
|
|
static unsigned nrem = 0; /* bytes remaining in block */
|
| 39 |
|
|
static unsigned nextalloc = MINBLOCK; /* next block size */
|
| 40 |
greg |
1.1 |
register char *cp;
|
| 41 |
greg |
2.2 |
register unsigned n;
|
| 42 |
greg |
1.1 |
|
| 43 |
greg |
2.2 |
for (cp = s; *cp++; ) /* compute strlen()+1 */
|
| 44 |
|
|
;
|
| 45 |
|
|
if ((n = cp-s) > nrem) { /* do we need more core? */
|
| 46 |
|
|
bfree(curp, nrem); /* free remnant */
|
| 47 |
|
|
while (n > nextalloc)
|
| 48 |
|
|
nextalloc <<= 1;
|
| 49 |
|
|
if ((curp = bmalloc(nrem=nextalloc)) == NULL) {
|
| 50 |
|
|
eputs("out of memory in savqstr");
|
| 51 |
|
|
quit(1);
|
| 52 |
|
|
}
|
| 53 |
|
|
if ((nextalloc <<= 1) > MAXBLOCK) /* double block size */
|
| 54 |
|
|
nextalloc = MAXBLOCK;
|
| 55 |
greg |
1.1 |
}
|
| 56 |
greg |
2.2 |
for (cp = curp; *cp++ = *s++; ) /* inline strcpy() */
|
| 57 |
|
|
;
|
| 58 |
|
|
s = curp; /* update allocation info. */
|
| 59 |
|
|
curp = cp;
|
| 60 |
|
|
nrem -= n;
|
| 61 |
|
|
return(s); /* return new location */
|
| 62 |
greg |
1.1 |
}
|
| 63 |
|
|
|
| 64 |
|
|
|
| 65 |
greg |
2.2 |
freeqstr(s) /* free a private string (not recommended) */
|
| 66 |
greg |
1.1 |
char *s;
|
| 67 |
|
|
{
|
| 68 |
|
|
bfree(s, strlen(s)+1);
|
| 69 |
|
|
}
|
