-
Notifications
You must be signed in to change notification settings - Fork 87
/
xbuf.c
52 lines (48 loc) · 812 Bytes
/
xbuf.c
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
#include "less.h"
#include "xbuf.h"
/*
* Initialize an expandable text buffer.
*/
public void
xbuf_init(xbuf)
struct xbuffer *xbuf;
{
xbuf->data = NULL;
xbuf->size = xbuf->end = 0;
}
public void
xbuf_deinit(xbuf)
struct xbuffer *xbuf;
{
if (xbuf->data != NULL)
free(xbuf->data);
xbuf_init(xbuf);
}
public void
xbuf_reset(xbuf)
struct xbuffer *xbuf;
{
xbuf->end = 0;
}
/*
* Add a char to an expandable text buffer.
*/
public void
xbuf_add(xbuf, ch)
struct xbuffer *xbuf;
int ch;
{
if (xbuf->end >= xbuf->size)
{
char *data;
xbuf->size = (xbuf->size == 0) ? 16 : xbuf->size * 2;
data = (char *) ecalloc(xbuf->size, sizeof(char));
if (xbuf->data != NULL)
{
memcpy(data, xbuf->data, xbuf->end);
free(xbuf->data);
}
xbuf->data = data;
}
xbuf->data[xbuf->end++] = ch;
}