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both "to_str" and "<=>". * compar.c (cmp_gt): return nil if "<=>" returns nil (means incomparable). * compar.c (cmp_ge): ditto. * compar.c (cmp_lt): ditto. * compar.c (cmp_between): use RTEST(), since cmp_lt and cmp_gt may return nil. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3517 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
112 lines
2.2 KiB
C
112 lines
2.2 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) 1993-2003 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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int
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rb_cmpint(val)
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VALUE val;
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{
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if (FIXNUM_P(val)) return FIX2INT(val);
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if (TYPE(val) == T_BIGNUM) {
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if (RBIGNUM(val)->sign) return 1;
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return -1;
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}
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if (RTEST(rb_funcall(val, '>', 1, INT2FIX(0)))) return 1;
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if (RTEST(rb_funcall(val, '<', 1, INT2FIX(0)))) return -1;
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return 0;
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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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int c;
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if (x == y) return Qtrue;
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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 (rb_cmpint(c) == 0) return Qtrue;
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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 Qnil;
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if (rb_cmpint(c) > 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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if (NIL_P(c)) return Qnil;
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if (rb_cmpint(c) >= 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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if (NIL_P(c)) return Qnil;
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if (rb_cmpint(c) < 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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if (NIL_P(c)) return Qnil;
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if (rb_cmpint(c) <= 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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if (RTEST(cmp_lt(x, min))) return Qfalse;
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if (RTEST(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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