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+/***********************************************************
+Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
+Netherlands.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior permission.
+
+STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/*
+The macro PROTO(x) is used to put function prototypes in the source.
+This is defined differently for compilers that support prototypes than
+for compilers that don't. It should be used as follows:
+ int some_function PROTO((int arg1, char *arg2));
+A variant FPROTO(x) is used for cases where Standard C allows prototypes
+but Think C doesn't (mostly function pointers).
+
+This file also defines the macro HAVE_PROTOTYPES if and only if
+the PROTO() macro expands the prototype. It is also allowed to predefine
+HAVE_PROTOTYPES to force prototypes on.
+*/
+
+#ifndef PROTO
+
+#ifdef __STDC__
+#define HAVE_PROTOTYPES
+#endif
+
+#ifdef THINK_C
+#undef HAVE_PROTOTYPES
+#define HAVE_PROTOTYPES
+#endif
+
+#ifdef sgi
+#ifdef mips
+#define HAVE_PROTOTYPES
+#endif
+#endif
+
+#ifdef HAVE_PROTOTYPES
+#define PROTO(x) x
+#else
+#define PROTO(x) ()
+#endif
+
+#endif /* PROTO */
+
+
+/* FPROTO() is for cases where Think C doesn't like prototypes */
+
+#ifdef THINK_C
+#define FPROTO(arglist) ()
+#else /* !THINK_C */
+#define FPROTO(arglist) PROTO(arglist)
+#endif /* !THINK_C */
+
+#ifndef HAVE_PROTOTYPES
+#define const /*empty*/
+#else /* HAVE_PROTOTYPES */
+#ifdef THINK_C
+#undef const
+#define const /*empty*/
+#endif /* THINK_C */
+#endif /* HAVE_PROTOTYPES */