[PATCH]: Portability fixes

[Christos Zoulas]

Hello,

Here are some simple changes for your consideration:

1. passing possibly negative values to isdigit is undefined behavior:
   http://www.opengroup.org/onlinepubs/009695399/functions/isdigit.html
2. passing possibly negative values to isspace is undefined behavior:
   http://www.opengroup.org/onlinepubs/009695399/functions/isspace.html
3. last is possibly uninitialized.
4. recvfrom argument should be socklen_t not int:
   http://www.opengroup.org/onlinepubs/007908775/xns/recvfrom.html

Thanks,

christos

diff -r fc30e7f4b9b3 src/solaris/native/java/lang/UNIXProcess_md.c
--- a/src/solaris/native/java/lang/UNIXProcess_md.c	Fri Jan 16 11:24:18 2009 -0500
+++ b/src/solaris/native/java/lang/UNIXProcess_md.c	Mon Jan 22 16:25:36 2009 -0500
@@ -377,7 +377,7 @@
      */
     while ((dirp = readdir(dp)) != NULL) {
         int fd;
-        if (isdigit(dirp->d_name[0]) &&
+        if (isdigit((unsigned char)dirp->d_name[0]) &&
             (fd = strtol(dirp->d_name, NULL, 10)) >= from_fd + 2)
             close(fd);
     }
diff -r fc30e7f4b9b3 src/solaris/native/java/net/Inet4AddressImpl.c
--- a/src/solaris/native/java/net/Inet4AddressImpl.c	Fri Jan 16 11:24:18 2009 -0500
+++ b/src/solaris/native/java/net/Inet4AddressImpl.c	Mon Jan 22 16:25:36 2009 -0500
@@ -155,7 +155,7 @@
      * Workaround for Solaris bug 4160367 - if a hostname contains a
      * white space then 0.0.0.0 is returned
      */
-    if (isspace(hostname[0])) {
+    if (isspace((unsigned char)hostname[0])) {
 	JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException",
 			(char *)hostname);
 	JNU_ReleaseStringPlatformChars(env, host, hostname);
@@ -172,7 +172,7 @@
 	return NULL;
     } else {
 	int i = 0;
-	struct addrinfo *itr, *last, *iterator = res;
+	struct addrinfo *itr, *last = NULL, *iterator = res;
 	while (iterator != NULL) {
 	    int skip = 0;
 	    itr = resNew;
@@ -603,7 +603,8 @@
 ping4(JNIEnv *env, jint fd, struct sockaddr_in* him, jint timeout,
       struct sockaddr_in* netif, jint ttl) {
     jint size;
-    jint n, len, hlen1, icmplen;
+    jint n, hlen1, icmplen;
+    socklen_t len;
     char sendbuf[1500];
     char recvbuf[1500];
     struct icmp *icmp;