xref: /src/usr.bin/m4/TEST/hash.m4

#
# Copyright (c) 1989 The Regents of the University of California.
# All rights reserved.
#
# This code is derived from software contributed to Berkeley by
# Ozan Yigit.
#
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# modification, are permitted provided that the following conditions
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# 1. Redistributions of source code must retain the above copyright
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#    must display the following acknowledgement:
#	This product includes software developed by the University of
#	California, Berkeley and its contributors.
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#	@(#)hash.m4	5.2 (Berkeley) 4/12/91
#

dnl	This probably will not run on any m4 that cannot
dnl	handle char constants in eval.
dnl
changequote(<,>) define(HASHVAL,99) dnl
define(hash,<eval(str(substr($1,1),0)%HASHVAL)>) dnl
define(str,
	<ifelse($1,",$2,
		<str(substr(<$1>,1),<eval($2+'substr($1,0,1)')>)>)
	>) dnl
define(KEYWORD,<$1,hash($1),>) dnl
define(TSTART,
<struct prehash {
	char *keyword;
	int   hashval;
} keytab[] = {>) dnl
define(TEND,<	"",0
};>) dnl