зеркало из https://github.com/github/ruby.git
120 строки
2.1 KiB
C
120 строки
2.1 KiB
C
/**********************************************************************
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compar.c -
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$Author$
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$Date$
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created at: Thu Aug 26 14:39:48 JST 1993
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Copyright (C) 1993-2001 Yukihiro Matsumoto
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**********************************************************************/
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#include "ruby.h"
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VALUE rb_mComparable;
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static ID cmp;
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static VALUE
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cmp_eq(a)
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VALUE *a;
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{
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VALUE c = rb_funcall(a[0], cmp, 1, a[1]);
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int t = NUM2INT(c);
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if (t == 0) return Qtrue;
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return Qfalse;
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}
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static VALUE
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cmp_failed()
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{
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return Qfalse;
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}
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static VALUE
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cmp_equal(x, y)
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VALUE x, y;
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{
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VALUE a[2];
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if (x == y) return Qtrue;
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a[0] = x; a[1] = y;
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return rb_rescue2(cmp_eq, (VALUE)a, cmp_failed, 0,
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rb_eStandardError, rb_eNameError, 0);
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}
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static VALUE
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cmp_gt(x, y)
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VALUE x, y;
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{
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VALUE c = rb_funcall(x, cmp, 1, y);
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int t = NUM2INT(c);
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if (t > 0) return Qtrue;
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return Qfalse;
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}
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static VALUE
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cmp_ge(x, y)
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VALUE x, y;
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{
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VALUE c = rb_funcall(x, cmp, 1, y);
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int t = NUM2INT(c);
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if (t >= 0) return Qtrue;
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return Qfalse;
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}
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static VALUE
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cmp_lt(x, y)
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VALUE x, y;
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{
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VALUE c = rb_funcall(x, cmp, 1, y);
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int t = NUM2INT(c);
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if (t < 0) return Qtrue;
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return Qfalse;
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}
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static VALUE
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cmp_le(x, y)
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VALUE x, y;
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{
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VALUE c = rb_funcall(x, cmp, 1, y);
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int t = NUM2INT(c);
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if (t <= 0) return Qtrue;
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return Qfalse;
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}
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static VALUE
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cmp_between(x, min, max)
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VALUE x, min, max;
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{
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VALUE c = rb_funcall(x, cmp, 1, min);
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long t = NUM2LONG(c);
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if (t < 0) return Qfalse;
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c = rb_funcall(x, cmp, 1, max);
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t = NUM2LONG(c);
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if (t > 0) return Qfalse;
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return Qtrue;
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}
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void
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Init_Comparable()
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{
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rb_mComparable = rb_define_module("Comparable");
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rb_define_method(rb_mComparable, "==", cmp_equal, 1);
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rb_define_method(rb_mComparable, ">", cmp_gt, 1);
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rb_define_method(rb_mComparable, ">=", cmp_ge, 1);
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rb_define_method(rb_mComparable, "<", cmp_lt, 1);
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rb_define_method(rb_mComparable, "<=", cmp_le, 1);
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rb_define_method(rb_mComparable, "between?", cmp_between, 2);
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cmp = rb_intern("<=>");
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}
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