Merge pull request #2532 from chasonr/float-to-string

Remove some roundoff from mrb_flo_to_str

1 files changed, 3 insertions, 3 deletions

diff --git a/src/numeric.c b/src/numeric.c
index 043dfa1f5..41ffe5fcf 100644
--- a/src/numeric.c
+++ b/src/numeric.c
@@ -188,8 +188,8 @@ mrb_flo_to_str(mrb_state *mrb, mrb_float flo)
 
     /* puts digits */
     while (max_digits >= 0) {
-      double weight = pow(10.0, m);
-      double fdigit = n / weight;
+      double weight = (m < 0) ? 0.0 : pow(10.0, m);
+      double fdigit = (m < 0) ? n * 10.0 : n / weight;
 
       if (fdigit < 0) fdigit = n = 0;
       if (m < -1 && fdigit < FLO_EPSILON) {
@@ -204,7 +204,7 @@ mrb_flo_to_str(mrb_state *mrb, mrb_float flo)
         continue;
       }
       *(c++) = '0' + digit;
-      n -= (digit * weight);
+      n = (m < 0) ? n * 10.0 - digit : n - (digit * weight);
       max_digits--;
       if (m-- == 0) {
         *(c++) = '.';