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
82
83
84
85
86
87
88
89
90
91
92
|
/*
* Copyright (c) 1994 Christos Zoulas
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christos Zoulas.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
/* emalloc():
* Error checked malloc
*/
void *
emalloc(size_t s)
{
void *ptr = malloc(s);
if (ptr == NULL)
err(1, NULL);
return ptr;
}
/* erealloc():
* Error checked realloc
*/
void *
erealloc(void *p, size_t s)
{
void *ptr = realloc(p, s);
if (ptr == NULL)
err(1, NULL);
return ptr;
}
/* get_line():
* Read a line from a file parsing continuations ending in \
* and eliminating trailing newlines.
*/
char *
get_line(FILE *fp, size_t *size)
{
size_t s, len = 0;
char *buf = NULL, *ptr;
int cnt = 1;
while (cnt) {
if ((ptr = fgetln(fp, &s)) == NULL) {
*size = len;
return buf;
}
if (ptr[s - 1] == '\n') /* the newline may be missing at EOF */
s--; /* forget newline */
if (s && (cnt = (ptr[s - 1] == '\\'))) /* check for \\ */
s--; /* forget \\ */
buf = erealloc(buf, len + s + 1);
memcpy(buf + len, ptr, s);
len += s;
buf[len] = '\0';
}
*size = len;
return buf;
}
|
