Add missing _ASSIGN() macro in NaCl's sys/socket.h

native_client_sdk/src/libraries/third_party/newlib-extras/sys/socket.h

 /*
  * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
  *      The Regents of the University of California.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 41 matching lines @@
  */
 #ifdef _BSD_SA_FAMILY_T_
 typedef _BSD_SA_FAMILY_T_       sa_family_t;
 #undef _BSD_SA_FAMILY_T_
 #endif
 
 #ifdef  _BSD_SOCKLEN_T_
 typedef _BSD_SOCKLEN_T_ socklen_t;
 #undef  _BSD_SOCKLEN_T_
 #endif
- 
+
 /*
  * Types
  */
 #define SOCK_STREAM     1               /* stream socket */
 #define SOCK_DGRAM      2               /* datagram socket */
 #define SOCK_RAW        3               /* raw-protocol interface */
 #define SOCK_RDM        4               /* reliably-delivered message */
 #define SOCK_SEQPACKET  5               /* sequenced packet stream */
 
 /* Socket type flags that can be or'd with the above types */
@@ skipping 275 matching lines @@
  */
 struct cmsgcred {
         pid_t   cmcred_pid;             /* PID of sending process */
         uid_t   cmcred_uid;             /* real UID of sending process */
         uid_t   cmcred_euid;            /* effective UID of sending process */
         gid_t   cmcred_gid;             /* real GID of sending process */
         short   cmcred_ngroups;         /* number or groups */
         gid_t   cmcred_groups[CMGROUP_MAX];     /* groups */
 };
 
+/*
+ * Round p (pointer or byte index) up to a correctly-aligned value
+ * for all data types (int, long, ...).   The result is unsigned int
+ * and must be cast to any desired pointer type.
+ */
+#ifndef _ALIGNBYTES
+#define _ALIGNBYTES (sizeof(int) - 1)
+#endif
+#ifndef _ALIGN
+#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
+#endif
+
 /* given pointer to struct cmsghdr, return pointer to data */
 #define CMSG_DATA(cmsg)         ((unsigned char *)(cmsg) + \
                                  _ALIGN(sizeof(struct cmsghdr)))
 
 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
 #define CMSG_NXTHDR(mhdr, cmsg) \
         (((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
           _ALIGN(sizeof(struct cmsghdr)) > \
             (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
             (struct cmsghdr *)NULL : \
             (struct cmsghdr *)((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
 
 #define CMSG_FIRSTHDR(mhdr)     ((struct cmsghdr *)(mhdr)->msg_control)
 
 /* RFC 2292 additions */
-        
+
 #define CMSG_SPACE(l)           (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
 #define CMSG_LEN(l)             (_ALIGN(sizeof(struct cmsghdr)) + (l))
 
 #ifdef _KERNEL
 #define CMSG_ALIGN(n)   _ALIGN(n)
 #endif
 
 /* "Socket"-level control message types: */
 #define SCM_RIGHTS      0x01            /* access rights (array of int) */
 #define SCM_TIMESTAMP   0x02            /* timestamp (struct timeval) */
@@ skipping 54 matching lines @@
             size_t, int, const struct sockaddr *, socklen_t);
 ssize_t sendmsg(int, const struct msghdr *, int);
 int     sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
 int     setsockopt(int, int, int, const void *, socklen_t);
 int     shutdown(int, int);
 int     socket(int, int, int);
 int     socketpair(int, int, int, int *);
 __END_DECLS
 
 #endif /* !_SYS_SOCKET_H_ */