blob: 950b3e2165bb690671cf5a88fee5b26f178d3326 (
plain)
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
|
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <mouse.h>
#include <frame.h>
#define CHUNK 16
#define ROUNDUP(n) ((n+CHUNK)&~(CHUNK-1))
uchar *
_frallocstr(Frame *f, unsigned n)
{
uchar *p;
p = malloc(ROUNDUP(n));
if(p == 0)
drawerror(f->display, "out of memory");
return p;
}
void
_frinsure(Frame *f, int bn, unsigned n)
{
Frbox *b;
uchar *p;
b = &f->box[bn];
if(b->nrune < 0)
drawerror(f->display, "_frinsure");
if(ROUNDUP(b->nrune) > n) /* > guarantees room for terminal NUL */
return;
p = _frallocstr(f, n);
b = &f->box[bn];
memmove(p, b->ptr, NBYTE(b)+1);
free(b->ptr);
b->ptr = p;
}
|