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/************************************************
compar.c -
$Author: matz $
$Date: 1994/10/14 06:19:05 $
created at: Thu Aug 26 14:39:48 JST 1993
Copyright (C) 1995 Yukihiro Matsumoto
************************************************/
#include "ruby.h"
VALUE M_Comparable;
static ID cmp;
static VALUE
Fcmp_eq(x, y)
VALUE x, y;
{
VALUE c = rb_funcall(x, cmp, 1, y);
int t = NUM2INT(c);
if (t == 0) return TRUE;
return FALSE;
}
static VALUE
Fcmp_gt(x, y)
VALUE x, y;
{
VALUE c = rb_funcall(x, cmp, 1, y);
int t = NUM2INT(c);
if (t > 0) return y;
return FALSE;
}
static VALUE
Fcmp_ge(x, y)
VALUE x, y;
{
VALUE c = rb_funcall(x, cmp, 1, y);
int t = NUM2INT(c);
if (t >= 0) return y;
return FALSE;
}
static VALUE
Fcmp_lt(x, y)
VALUE x, y;
{
VALUE c = rb_funcall(x, cmp, 1, y);
int t = NUM2INT(c);
if (t < 0) return y;
return FALSE;
}
static VALUE
Fcmp_le(x, y)
VALUE x, y;
{
VALUE c = rb_funcall(x, cmp, 1, y);
int t = NUM2INT(c);
if (t <= 0) return y;
return FALSE;
}
static VALUE
Fcmp_between(x, min, max)
VALUE x, min, max;
{
VALUE c = rb_funcall(x, cmp, 1, min);
int t = NUM2INT(c);
if (t < 0) return FALSE;
c = rb_funcall(x, cmp, 1, min);
t = NUM2INT(c);
if (t > 0) return FALSE;
return TRUE;
}
Init_Comparable()
{
M_Comparable = rb_define_module("Comparable");
rb_define_method(M_Comparable, "==", Fcmp_eq, 1);
rb_define_method(M_Comparable, ">", Fcmp_gt, 1);
rb_define_method(M_Comparable, ">=", Fcmp_ge, 1);
rb_define_method(M_Comparable, "<", Fcmp_lt, 1);
rb_define_method(M_Comparable, "<=", Fcmp_le, 1);
rb_define_method(M_Comparable, "between", Fcmp_between, 2);
cmp = rb_intern("<=>");
}
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