projects
/
musl
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
optimize legacy ffs function
[musl]
/
src
/
stdio
/
open_memstream.c
diff --git
a/src/stdio/open_memstream.c
b/src/stdio/open_memstream.c
index
dedc3d5
..
687e818
100644
(file)
--- a/
src/stdio/open_memstream.c
+++ b/
src/stdio/open_memstream.c
@@
-13,22
+13,13
@@
static off_t ms_seek(FILE *f, off_t off, int whence)
{
ssize_t base;
struct cookie *c = f->cookie;
{
ssize_t base;
struct cookie *c = f->cookie;
- switch (whence) {
- case SEEK_SET:
- base = 0;
- break;
- case SEEK_CUR:
- base = c->pos;
- break;
- case SEEK_END:
- base = c->len;
- break;
- default:
- fail:
+ if (whence>2U) {
+fail:
errno = EINVAL;
return -1;
}
errno = EINVAL;
return -1;
}
- if (-off > base || off > SSIZE_MAX-base) goto fail;
+ base = (size_t [3]){0, c->pos, c->len}[whence];
+ if (off < -base || off > SSIZE_MAX-base) goto fail;
return c->pos = base+off;
}
return c->pos = base+off;
}
@@
-41,8
+32,8
@@
static size_t ms_write(FILE *f, const unsigned char *buf, size_t len)
f->wpos = f->wbase;
if (ms_write(f, f->wbase, len2) < len2) return 0;
}
f->wpos = f->wbase;
if (ms_write(f, f->wbase, len2) < len2) return 0;
}
- if (len
> c->space - c->pos
) {
- len2 = 2*c->space+1 | c->
space
+len+1;
+ if (len
+ c->pos >= c->space
) {
+ len2 = 2*c->space+1 | c->
pos
+len+1;
newbuf = realloc(c->buf, len2);
if (!newbuf) return 0;
*c->bufp = c->buf = newbuf;
newbuf = realloc(c->buf, len2);
if (!newbuf) return 0;
*c->bufp = c->buf = newbuf;