1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/* * $OpenBSD: etc.c,v 1.3 2000/04/24 03:33:27 form Exp $*/
/*
*/
#include <err.h>
#include <stdlib.h>
#include <string.h>
/*
* Like strdup but get fatal error if memory is exhausted.
*/
char *
xstrdup(s)
char *s;
{
char *result = strdup(s);
if (!result)
errx(1, "virtual memory exhausted");
return result;
}
/*
* Like malloc but get fatal error if memory is exhausted.
*/
void *
xmalloc(size)
size_t size;
{
register void *result = (void *)malloc(size);
if (!result)
errx(1, "virtual memory exhausted");
return result;
}
/*
* Like realloc but get fatal error if memory is exhausted.
*/
void *
xrealloc(ptr, size)
void *ptr;
size_t size;
{
register void *result;
if (ptr == NULL)
result = (void *)malloc(size);
else
result = (void *)realloc(ptr, size);
if (!result)
errx(1, "virtual memory exhausted");
return result;
}
/*
* Return a newly-allocated string whose contents concatenate
* the strings S1, S2, S3.
*/
char *
concat(s1, s2, s3)
const char *s1, *s2, *s3;
{
register int len1 = strlen(s1),
len2 = strlen(s2),
len3 = strlen(s3);
register char *result = (char *)xmalloc(len1 + len2 + len3 + 1);
strcpy(result, s1);
strcpy(result + len1, s2);
strcpy(result + len1 + len2, s3);
result[len1 + len2 + len3] = 0;
return result;
}
|
