regex: port to hosts where malloc (0) == NULL

[gnulib.git] / lib / argmatch.h

diff --git a/lib/argmatch.h b/lib/argmatch.h
index f87729d..7e88696 100644 (file)
--- a/lib/argmatch.h
+++ b/lib/argmatch.h
@@ -1,6 +1,6 @@
 /* argmatch.h -- definitions and prototypes for argmatch.c
 
-   Copyright (C) 1990, 1998-1999, 2001-2002, 2004-2005, 2009-2011 Free Software
+   Copyright (C) 1990, 1998-1999, 2001-2002, 2004-2005, 2009-2012 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
@@ -40,14 +40,14 @@
    to the same values in VALLIST).  */
 
 ptrdiff_t argmatch (char const *arg, char const *const *arglist,
-                    char const *vallist, size_t valsize);
+                    char const *vallist, size_t valsize) _GL_ATTRIBUTE_PURE;
 
 # define ARGMATCH(Arg, Arglist, Vallist) \
   argmatch (Arg, Arglist, (char const *) (Vallist), sizeof *(Vallist))
 
 /* xargmatch calls this function when it fails.  This function should not
    return.  By default, this is a function that calls ARGMATCH_DIE which
-   in turn defaults to `exit (exit_failure)'.  */
+   in turn defaults to 'exit (exit_failure)'.  */
 typedef void (*argmatch_exit_fn) (void);
 extern argmatch_exit_fn argmatch_die;
 
@@ -93,7 +93,8 @@ ptrdiff_t __xargmatch_internal (char const *context,
 
 char const *argmatch_to_argument (char const *value,
                                   char const *const *arglist,
-                                  char const *vallist, size_t valsize);
+                                  char const *vallist, size_t valsize)
+  _GL_ATTRIBUTE_PURE;
 
 # define ARGMATCH_TO_ARGUMENT(Value, Arglist, Vallist)                  \
   argmatch_to_argument (Value, Arglist,                                 \