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avoid overflow in puts_scroll().

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26231 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Teruaki Kawashima 2010-05-21 13:30:21 +00:00
parent e2d1eb6fc8
commit 0ac61bffa7
2 changed files with 10 additions and 5 deletions
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6
firmware/drivers/lcd-bitmap-common.c
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@ -321,6 +321,7 @@ void LCDFN(puts_scroll_style_offset)(int x, int y, const unsigned char *string,
struct scrollinfo* s;
char *end;
int w, h;
int len;
if ((unsigned)y >= (unsigned)current_vp->height)
return;
@ -358,13 +359,14 @@ void LCDFN(puts_scroll_style_offset)(int x, int y, const unsigned char *string,
s->bidir = false;
if (!s->bidir) { /* add spaces if scrolling in the round */
strcat(s->line, " ");
strlcat(s->line, " ", sizeof s->line);
/* get new width incl. spaces */
s->width = LCDFN(getstringsize)(s->line, &w, &h);
}
end = strchr(s->line, '\0');
strlcpy(end, string, current_vp->width/2);
len = sizeof s->line - (end - s->line);
strlcpy(end, string, MIN(current_vp->width/2, len));
s->vp = current_vp;
s->y = y;