1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.5 |
static const char RCSid[] = "$Id$"; |
3 |
greg |
1.1 |
#endif |
4 |
greg |
2.3 |
/* |
5 |
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* Save unshared strings. |
6 |
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* |
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* External symbols declared in standard.h |
8 |
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*/ |
9 |
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10 |
greg |
2.4 |
#include "copyright.h" |
11 |
greg |
2.3 |
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12 |
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#include <stdlib.h> |
13 |
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14 |
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extern void eputs(); |
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extern void quit(); |
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17 |
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#if 1 |
18 |
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19 |
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char * |
20 |
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savqstr(s) /* save a private string */ |
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register char *s; |
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{ |
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register char *cp; |
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char *newp; |
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26 |
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for (cp = s; *cp++; ) /* compute strlen()+1 */ |
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; |
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newp = (char *)malloc(cp-s); |
29 |
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if (newp == NULL) { |
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eputs("out of memory in savqstr"); |
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quit(1); |
32 |
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} |
33 |
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for (cp = newp; *cp++ = *s++; ) /* inline strcpy() */ |
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; |
35 |
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return(newp); /* return new location */ |
36 |
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} |
37 |
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38 |
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39 |
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void |
40 |
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freeqstr(s) /* free a private string */ |
41 |
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char *s; |
42 |
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{ |
43 |
greg |
2.5 |
if (s != NULL) |
44 |
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free((void *)s); |
45 |
greg |
2.3 |
} |
46 |
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47 |
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#else |
48 |
greg |
1.1 |
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49 |
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/* |
50 |
greg |
2.2 |
* Save unshared strings, packing them together into |
51 |
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* large blocks to optimize paging in VM environments. |
52 |
greg |
1.1 |
*/ |
53 |
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54 |
greg |
2.2 |
#ifdef BIGMEM |
55 |
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#ifndef MINBLOCK |
56 |
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#define MINBLOCK (1<<12) /* minimum allocation block size */ |
57 |
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#endif |
58 |
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#ifndef MAXBLOCK |
59 |
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#define MAXBLOCK (1<<16) /* maximum allocation block size */ |
60 |
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#endif |
61 |
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#else |
62 |
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#ifndef MINBLOCK |
63 |
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#define MINBLOCK (1<<10) /* minimum allocation block size */ |
64 |
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#endif |
65 |
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#ifndef MAXBLOCK |
66 |
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#define MAXBLOCK (1<<14) /* maximum allocation block size */ |
67 |
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#endif |
68 |
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#endif |
69 |
greg |
1.1 |
|
70 |
greg |
2.2 |
extern char *bmalloc(); |
71 |
greg |
1.1 |
|
72 |
greg |
2.2 |
|
73 |
greg |
1.1 |
char * |
74 |
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savqstr(s) /* save a private string */ |
75 |
greg |
2.2 |
register char *s; |
76 |
greg |
1.1 |
{ |
77 |
greg |
2.2 |
static char *curp = NULL; /* allocated memory pointer */ |
78 |
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static unsigned nrem = 0; /* bytes remaining in block */ |
79 |
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static unsigned nextalloc = MINBLOCK; /* next block size */ |
80 |
greg |
1.1 |
register char *cp; |
81 |
greg |
2.2 |
register unsigned n; |
82 |
greg |
1.1 |
|
83 |
greg |
2.2 |
for (cp = s; *cp++; ) /* compute strlen()+1 */ |
84 |
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; |
85 |
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if ((n = cp-s) > nrem) { /* do we need more core? */ |
86 |
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bfree(curp, nrem); /* free remnant */ |
87 |
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while (n > nextalloc) |
88 |
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nextalloc <<= 1; |
89 |
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if ((curp = bmalloc(nrem=nextalloc)) == NULL) { |
90 |
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eputs("out of memory in savqstr"); |
91 |
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quit(1); |
92 |
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} |
93 |
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if ((nextalloc <<= 1) > MAXBLOCK) /* double block size */ |
94 |
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nextalloc = MAXBLOCK; |
95 |
greg |
1.1 |
} |
96 |
greg |
2.2 |
for (cp = curp; *cp++ = *s++; ) /* inline strcpy() */ |
97 |
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; |
98 |
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s = curp; /* update allocation info. */ |
99 |
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curp = cp; |
100 |
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nrem -= n; |
101 |
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return(s); /* return new location */ |
102 |
greg |
1.1 |
} |
103 |
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104 |
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105 |
greg |
2.3 |
void |
106 |
greg |
2.2 |
freeqstr(s) /* free a private string (not recommended) */ |
107 |
greg |
1.1 |
char *s; |
108 |
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{ |
109 |
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bfree(s, strlen(s)+1); |
110 |
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} |
111 |
greg |
2.3 |
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112 |
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#endif |