[uClibc-cvs] uClibc/libc/inet addr.c,1.12,1.13
Erik Andersen
andersen at uclibc.org
Mon Aug 4 19:03:37 UTC 2003
Update of /var/cvs/uClibc/libc/inet
In directory winder:/tmp/cvs-serv13930
Modified Files:
addr.c
Log Message:
Update inet_aton() to support an undocumented feature of inet_aton,
per UNIX Network Programming, Volume 1, second edition:
An undocumented feature of inet_aton is that if addrptr is
a null pointer, the function still performs it validation
of the input string, but does not store the result.
Index: addr.c
===================================================================
RCS file: /var/cvs/uClibc/libc/inet/addr.c,v
retrieving revision 1.12
retrieving revision 1.13
diff -u -d -r1.12 -r1.13
--- addr.c 17 Sep 2002 01:40:47 -0000 1.12
+++ addr.c 4 Aug 2003 19:03:33 -0000 1.13
@@ -24,20 +24,17 @@
#include <ctype.h>
#include <netinet/in.h>
-int inet_aton(const char *cp, struct in_addr *inp);
+int inet_aton(const char *cp, struct in_addr *addrptr);
#ifdef L_inet_aton
-int inet_aton(cp, inp)
+int inet_aton(cp, addrptr)
const char *cp;
-struct in_addr *inp;
+struct in_addr *addrptr;
{
unsigned long addr;
int value;
int part;
- if (!inp)
- return 0;
-
addr = 0;
for (part = 1; part <= 4; part++) {
@@ -65,7 +62,16 @@
addr |= value;
}
- inp->s_addr = htonl(addr);
+ /* W. Richard Stevens in his book UNIX Network Programming,
+ * Volume 1, second edition, on page 71 says:
+ *
+ * An undocumented feature of inet_aton is that if addrptr is
+ * a null pointer, the function still performs it validation
+ * of the input string, but does not store the result.
+ */
+ if (addrptr) {
+ addrptr->s_addr = htonl(addr);
+ }
return 1;
}
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