bc: do not yet allow 2^2.1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index ae5105b01..8cd67b0f5 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -2095,8 +2095,10 @@ static FAST_FUNC BC_STATUS zbc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size
         size_t i, powrdx, resrdx;
         bool neg;
 
-// GNU bc does not allow 2^2.0. We do.
-//      if (b->rdx) RETURN_STATUS(bc_error("non integer number"));
+        // GNU bc does not allow 2^2.0 - we do
+        for (i = 0; i < b->rdx; i++)
+                if (b->num[i] != 0)
+                        RETURN_STATUS(bc_error("not an integer"));
 
         if (b->len == 0) {
                 bc_num_one(c);
@@ -2505,7 +2507,7 @@ static BC_STATUS zdc_num_modexp(BcNum *a, BcNum *b, BcNum *c, BcNum *restrict d)
         if (c->len == 0)
                 RETURN_STATUS(bc_error("divide by zero"));
         if (a->rdx || b->rdx || c->rdx)
-                RETURN_STATUS(bc_error("non integer number"));
+                RETURN_STATUS(bc_error("not an integer"));
         if (b->neg)
                 RETURN_STATUS(bc_error("negative number"));