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Go back to Bruce's fix with a minor change that will allow a NULL string

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pointer if len is 0. I should have looked at the revision history - I would
have found that Bruce already fixed the bug with len=0 over a month ago.
Whoever said that the bug was in 2.0 was wrong.
This commit is contained in:
David Greenman 1994-11-25 08:58:53 +00:00
parent eadf9e27cd
commit 7e20f2848c
1 changed files with 3 additions and 4 deletions
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7
lib/libc/i386/string/memchr.S
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@ -27,11 +27,11 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: memchr.S,v 1.2 1994/10/27 11:36:11 bde Exp $
* $Id: memchr.S,v 1.3 1994/11/25 04:11:19 davidg Exp $
*/
#if defined(LIBC_RCS) && !defined(lint)
.asciz "$Id: memchr.S,v 1.2 1994/10/27 11:36:11 bde Exp $"
.asciz "$Id: memchr.S,v 1.3 1994/11/25 04:11:19 davidg Exp $"
#endif /* LIBC_RCS and not lint */
#include "DEFS.h"
@ -49,8 +49,7 @@ ENTRY(memchr)
movl 8(%esp),%edi /* string address */
movl 12(%esp),%eax /* set character to search for */
movl 16(%esp),%ecx /* set length of search */
testl %ecx,%ecx /* return NULL if len == 0 */
jz L1
testl %esp,%esp /* clear Z flag, for len == 0 */
cld /* set search forward */
repne /* search! */
scasb