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authormatz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2003-04-09 06:44:34 +0000
committermatz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2003-04-09 06:44:34 +0000
commit5cb4133e6719ba8b54f3bb5f838cd548288cedd0 (patch)
tree3547858c5bf05ad31472307fd110d35347644450 /bignum.c
parentbb4ade0ab6d298837891224d839026cc7c7c988a (diff)
* bignum.c (BIGZEROP): macro to determine if x is a bignum zero.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3653 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'bignum.c')
-rw-r--r--bignum.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/bignum.c b/bignum.c
index 577f072..0ae88ab 100644
--- a/bignum.c
+++ b/bignum.c
@@ -33,6 +33,8 @@ VALUE rb_cBignum;
#define BIGLO(x) ((BDIGIT)((x) & (BIGRAD-1)))
#define BDIGMAX ((BDIGIT)-1)
+#define BIGZEROP(x) (RBIGNUM(x)->len == 0 || (RBIGNUM(x)->len == 1 && BDIGITS(x)[0] == 0))
+
static VALUE
bignew_1(klass, len, sign)
VALUE klass;
@@ -612,7 +614,7 @@ rb_big2str(x, base)
return rb_fix2str(x, base);
}
i = RBIGNUM(x)->len;
- if (i == 0 || (i == 1 && BDIGITS(x)[0] == 0)) {
+ if (BIGZEROP(x)) {
return rb_str_new2("0");
}
if (base == 10) {
@@ -1123,8 +1125,8 @@ bigdivrem(x, y, divp, modp)
BDIGIT_DBL_SIGNED num;
BDIGIT dd, q;
+ if (BIGZEROP(y)) rb_num_zerodiv();
yds = BDIGITS(y);
- if (ny == 0 && yds[0] == 0) rb_num_zerodiv();
if (nx < ny || (nx == ny && BDIGITS(x)[nx - 1] < BDIGITS(y)[ny - 1])) {
if (divp) *divp = rb_int2big(0);
if (modp) *modp = x;
@@ -1248,8 +1250,7 @@ bigdivmod(x, y, divp, modp)
VALUE mod;
bigdivrem(x, y, divp, &mod);
- if (RBIGNUM(x)->sign != RBIGNUM(y)->sign &&
- !(RBIGNUM(mod)->len == 1 && BDIGITS(mod)[0] == 0)) {
+ if (RBIGNUM(x)->sign != RBIGNUM(y)->sign && !BIGZEROP(x)) {
if (divp) *divp = bigadd(*divp, rb_int2big(1), 0);
if (modp) *modp = bigadd(mod, y, 1);
}
@@ -1728,8 +1729,8 @@ rb_big_rand(max, rand_buf)
{
VALUE v;
long len = RBIGNUM(max)->len;
-
- if (len == 0 && BDIGITS(max)[0] == 0) {
+
+ if (BIGZEROP(max)) {
return rb_float_new(rand_buf[0]);
}
v = bignew(len,1);