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[unix-history] / usr / src / usr.bin / window / var.h

/*
* @(#)var.h    3.7 %G%
*/

/*
* Copyright (c) 1983 Regents of the University of California,
* All rights reserved.  Redistribution permitted subject to
* the terms of the Berkeley Software License Agreement.
*/

struct var {
       struct var *r_left;
       struct var *r_right;
       char *r_name;
       struct value r_val;
};

struct var *var_set1();
struct var *var_setstr1();
struct var *var_setnum1();
struct var **var_lookup1();

#define var_set(n, v)           var_set1(&var_head, n, v)
#define var_setstr(n, s)        var_setstr1(&var_head, n, s)
#define var_setnum(n, i)        var_setnum1(&var_head, n, i)
#define var_unset(n)            var_unset1(&var_head, n)
#define var_lookup(n)           (*var_lookup1(&var_head, n))
#define var_walk(f, a)          var_walk1(var_head, f, a)

struct var *var_head;           /* secret, shhh */