X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=lib%2Fstrerror_r.c;h=2a22cb41466327d730256d5c883684f19852c385;hb=659cae49714b93487242525dfa0e5737463d78d8;hp=c556c26737a4864529511fd2f5d97b327f7116d9;hpb=a8a88eddaa90432e6ec1b8d9d5c9842bc91afd1d;p=debian%2Fgzip

diff --git a/lib/strerror_r.c b/lib/strerror_r.c
index c556c26..2a22cb4 100644
--- a/lib/strerror_r.c
+++ b/lib/strerror_r.c
@@ -61,7 +61,7 @@ int __xpg_strerror_r (int errnum, char *buf, size_t buflen);
 
 # define USE_SYSTEM_STRERROR 1
 
-# if defined __NetBSD__ || defined __hpux || ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) || defined __sgi || (defined __sun && !defined _LP64) || defined __CYGWIN__
+# if defined __NetBSD__ || defined __hpux || (defined _WIN32 && !defined __CYGWIN__) || defined __sgi || (defined __sun && !defined _LP64) || defined __CYGWIN__
 
 /* No locking needed.  */
 
@@ -129,22 +129,13 @@ static int
 safe_copy (char *buf, size_t buflen, const char *msg)
 {
   size_t len = strlen (msg);
-  int ret;
+  size_t moved = len < buflen ? len : buflen - 1;
 
-  if (len < buflen)
-    {
-      /* Although POSIX allows memcpy() to corrupt errno, we don't
-         know of any implementation where this is a real problem.  */
-      memcpy (buf, msg, len + 1);
-      ret = 0;
-    }
-  else
-    {
-      memcpy (buf, msg, buflen - 1);
-      buf[buflen - 1] = '\0';
-      ret = ERANGE;
-    }
-  return ret;
+  /* Although POSIX lets memmove corrupt errno, we don't
+     know of any implementation where this is a real problem.  */
+  memmove (buf, msg, moved);
+  buf[moved] = '\0';
+  return len < buflen ? 0 : ERANGE;
 }
 
 
@@ -258,7 +249,7 @@ strerror_r (int errnum, char *buf, size_t buflen)
     /* Try to do what strerror (errnum) does, but without clobbering the
        buffer used by strerror().  */
 
-# if defined __NetBSD__ || defined __hpux || ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) || defined __CYGWIN__ /* NetBSD, HP-UX, native Windows, Cygwin */
+# if defined __NetBSD__ || defined __hpux || (defined _WIN32 && !defined __CYGWIN__) || defined __CYGWIN__ /* NetBSD, HP-UX, native Windows, Cygwin */
 
     /* NetBSD:         sys_nerr, sys_errlist are declared through _NETBSD_SOURCE
                        and <errno.h> above.
@@ -335,7 +326,7 @@ strerror_r (int errnum, char *buf, size_t buflen)
 
 #endif
 
-#if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
+#if defined _WIN32 && !defined __CYGWIN__
     /* MSVC 14 defines names for many error codes in the range 100..140,
        but _sys_errlist contains strings only for the error codes
        < _sys_nerr = 43.  */