зеркало из https://github.com/github/ruby.git
114 строки
2.4 KiB
C
114 строки
2.4 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) 1993-2002 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_equal(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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if (NIL_P(c)) return Qfalse;
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if (c == INT2FIX(0)) return Qtrue;
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if (TYPE(c) == T_BIGNUM) {
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if (rb_big_norm(c) == INT2FIX(0)) return Qtrue;
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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_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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if (NIL_P(c)) return Qfalse;
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if (FIXNUM_P(c) && FIX2INT(c) > 0) return Qtrue;
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if (TYPE(c) == T_BIGNUM) {
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if (rb_big_norm(x) == INT2FIX(0)) return Qfalse;
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if (RBIGNUM(c)->sign) return Qtrue;
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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_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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if (NIL_P(c)) return Qfalse;
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if (FIXNUM_P(c) && FIX2INT(c) >= 0) return Qtrue;
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if (TYPE(c) == T_BIGNUM) {
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if (rb_big_norm(x) == INT2FIX(0)) return Qtrue;
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if (RBIGNUM(c)->sign) return Qtrue;
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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_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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if (FIXNUM_P(c) && FIX2INT(c) < 0) return Qtrue;
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if (TYPE(c) == T_BIGNUM) {
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if (rb_big_norm(x) == INT2FIX(0)) return Qfalse;
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if (!RBIGNUM(c)->sign) return Qtrue;
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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_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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if (NIL_P(c)) return Qfalse;
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if (FIXNUM_P(c) && FIX2INT(c) <= 0) return Qtrue;
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if (TYPE(c) == T_BIGNUM) {
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if (rb_big_norm(x) == INT2FIX(0)) return Qtrue;
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if (!RBIGNUM(c)->sign) return Qtrue;
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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_between(x, min, max)
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VALUE x, min, max;
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{
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if (cmp_lt(x, min)) return Qfalse;
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if (cmp_gt(x, max)) 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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