1 |
greg |
1.1 |
#ifndef lint |
2 |
schorsch |
2.9 |
static const char RCSid[] = "$Id: savqstr.c,v 2.8 2003/07/27 22:12:01 schorsch Exp $"; |
3 |
greg |
1.1 |
#endif |
4 |
greg |
2.3 |
/* |
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* Save unshared strings. |
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* |
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* External symbols declared in standard.h |
8 |
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*/ |
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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> |
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14 |
schorsch |
2.9 |
#include "rtio.h" |
15 |
schorsch |
2.7 |
#include "rterror.h" |
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17 |
greg |
2.3 |
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18 |
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#if 1 |
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20 |
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char * |
21 |
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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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27 |
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for (cp = s; *cp++; ) /* compute strlen()+1 */ |
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; |
29 |
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newp = (char *)malloc(cp-s); |
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if (newp == NULL) { |
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eputs("out of memory in savqstr"); |
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quit(1); |
33 |
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} |
34 |
schorsch |
2.8 |
for (cp = newp; (*cp++ = *s++); ) /* inline strcpy() */ |
35 |
greg |
2.3 |
; |
36 |
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return(newp); /* return new location */ |
37 |
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} |
38 |
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39 |
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40 |
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void |
41 |
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freeqstr(s) /* free a private string */ |
42 |
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char *s; |
43 |
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{ |
44 |
greg |
2.5 |
if (s != NULL) |
45 |
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free((void *)s); |
46 |
greg |
2.3 |
} |
47 |
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48 |
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#else |
49 |
greg |
1.1 |
|
50 |
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/* |
51 |
greg |
2.2 |
* Save unshared strings, packing them together into |
52 |
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* large blocks to optimize paging in VM environments. |
53 |
greg |
1.1 |
*/ |
54 |
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55 |
greg |
2.6 |
#ifdef SMLMEM |
56 |
greg |
2.2 |
#ifndef MINBLOCK |
57 |
greg |
2.6 |
#define MINBLOCK (1<<10) /* minimum allocation block size */ |
58 |
greg |
2.2 |
#endif |
59 |
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#ifndef MAXBLOCK |
60 |
greg |
2.6 |
#define MAXBLOCK (1<<14) /* maximum allocation block size */ |
61 |
greg |
2.2 |
#endif |
62 |
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#else |
63 |
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#ifndef MINBLOCK |
64 |
greg |
2.6 |
#define MINBLOCK (1<<12) /* minimum allocation block size */ |
65 |
greg |
2.2 |
#endif |
66 |
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#ifndef MAXBLOCK |
67 |
greg |
2.6 |
#define MAXBLOCK (1<<16) /* maximum allocation block size */ |
68 |
greg |
2.2 |
#endif |
69 |
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#endif |
70 |
greg |
1.1 |
|
71 |
greg |
2.2 |
extern char *bmalloc(); |
72 |
greg |
1.1 |
|
73 |
greg |
2.2 |
|
74 |
greg |
1.1 |
char * |
75 |
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savqstr(s) /* save a private string */ |
76 |
greg |
2.2 |
register char *s; |
77 |
greg |
1.1 |
{ |
78 |
greg |
2.2 |
static char *curp = NULL; /* allocated memory pointer */ |
79 |
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static unsigned nrem = 0; /* bytes remaining in block */ |
80 |
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static unsigned nextalloc = MINBLOCK; /* next block size */ |
81 |
greg |
1.1 |
register char *cp; |
82 |
greg |
2.2 |
register unsigned n; |
83 |
greg |
1.1 |
|
84 |
greg |
2.2 |
for (cp = s; *cp++; ) /* compute strlen()+1 */ |
85 |
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; |
86 |
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if ((n = cp-s) > nrem) { /* do we need more core? */ |
87 |
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bfree(curp, nrem); /* free remnant */ |
88 |
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while (n > nextalloc) |
89 |
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nextalloc <<= 1; |
90 |
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if ((curp = bmalloc(nrem=nextalloc)) == NULL) { |
91 |
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eputs("out of memory in savqstr"); |
92 |
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quit(1); |
93 |
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} |
94 |
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if ((nextalloc <<= 1) > MAXBLOCK) /* double block size */ |
95 |
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nextalloc = MAXBLOCK; |
96 |
greg |
1.1 |
} |
97 |
greg |
2.2 |
for (cp = curp; *cp++ = *s++; ) /* inline strcpy() */ |
98 |
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; |
99 |
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s = curp; /* update allocation info. */ |
100 |
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curp = cp; |
101 |
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nrem -= n; |
102 |
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return(s); /* return new location */ |
103 |
greg |
1.1 |
} |
104 |
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105 |
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106 |
greg |
2.3 |
void |
107 |
greg |
2.2 |
freeqstr(s) /* free a private string (not recommended) */ |
108 |
greg |
1.1 |
char *s; |
109 |
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{ |
110 |
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bfree(s, strlen(s)+1); |
111 |
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} |
112 |
greg |
2.3 |
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113 |
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#endif |