tdo a better job with 64-bit files - plan9port - [fork] Plan 9 from user space
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---
(DIR) commit 39ef727f465306bad804814e58ee0a94224c9fec
(DIR) parent 75a69d3b20b73b4a66530043090198b8be1d7d0a
(HTM) Author: rsc <devnull@localhost>
Date: Wed, 16 Jun 2004 15:32:56 +0000
do a better job with 64-bit files
Diffstat:
M src/libbio/bseek.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
---
(DIR) diff --git a/src/libbio/bseek.c b/src/libbio/bseek.c
t@@ -5,6 +5,7 @@ off_t
Bseek(Biobuf *bp, off_t offset, int base)
{
vlong n, d;
+ int bufsz;
switch(bp->state) {
default:
t@@ -28,13 +29,16 @@ Bseek(Biobuf *bp, off_t offset, int base)
*/
if(base == 0) {
d = n - Boffset(bp);
- bp->icount += d;
- if(d >= 0) {
- if(bp->icount <= 0)
- return n;
- } else {
- if(bp->ebuf - bp->gbuf >= -bp->icount)
- return n;
+ bufsz = bp->ebuf - bp->gbuf;
+ if(-bufsz <= d && d <= bufsz){
+ bp->icount += d;
+ if(d >= 0) {
+ if(bp->icount <= 0)
+ return n;
+ } else {
+ if(bp->ebuf - bp->gbuf >= -bp->icount)
+ return n;
+ }
}
}