(must_be_dot_or_slash): FILESYSTEM_PREFIX_LEN -> FILE_SYSTEM_PREFIX_LEN.

[chaz/tar] / src / misc.c

diff --git a/src/misc.c b/src/misc.c
index bae6cfc1ef0a092d83133d763d35512086048ef8..2cd98730ec752202f372605cc7199c5f58dec322 100644 (file)
--- a/src/misc.c
+++ b/src/misc.c
@@ -207,7 +207,7 @@ static char *after_backup_name;
 static bool
 must_be_dot_or_slash (char const *file_name)
 {
-  file_name += FILESYSTEM_PREFIX_LEN (file_name);
+  file_name += FILE_SYSTEM_PREFIX_LEN (file_name);
 
   if (ISSLASH (file_name[0]))
     {
@@ -916,18 +916,29 @@ xpipe (int fd[2])
     call_arg_fatal ("pipe", _("interprocess channel"));
 }
 
-/* Return an unambiguous printable representation, allocated in slot N,
-   for NAME, suitable for diagnostics.  */
-char const *
-quote_n (int n, char const *name)
+/* Return PTR, aligned upward to the next multiple of ALIGNMENT.
+   ALIGNMENT must be nonzero.  The caller must arrange for ((char *)
+   PTR) through ((char *) PTR + ALIGNMENT - 1) to be addressable
+   locations.  */
+
+static inline void *
+ptr_align (void *ptr, size_t alignment)
 {
-  return quotearg_n_style (n, locale_quoting_style, name);
+  char *p0 = ptr;
+  char *p1 = p0 + alignment - 1;
+  return p1 - (size_t) p1 % alignment;
 }
 
-/* Return an unambiguous printable representation of NAME, suitable
-   for diagnostics.  */
-char const *
-quote (char const *name)
+/* Return the address of a page-aligned buffer of at least SIZE bytes.
+   The caller should free *PTR when done with the buffer.  */
+
+void *
+page_aligned_alloc (void **ptr, size_t size)
 {
-  return quote_n (0, name);
+  size_t alignment = getpagesize ();
+  size_t size1 = size + alignment;
+  if (size1 < size)
+    xalloc_die ();
+  *ptr = xmalloc (size1);
+  return ptr_align (*ptr, alignment);
 }