bk commit into 5.0 tree (kaa:1.2503) BUG#28121

[Alexey Kopytov]

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ChangeSet@stripped, 2007-05-28 21:43:31+04:00, kaa@stripped +1 -0
  Don't use log_01[] in my_strtod() to avoid loss of precision.
  
  This is for bug #28121.

  strings/strtod.c@stripped, 2007-05-28 21:43:27+04:00, kaa@stripped +2 -2
    Don't use log_01[] in my_strtod() to avoid loss of precision.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	kaa
# Host:	polly.local
# Root:	/home/kaa/src/maint/mysql-5.0-maint

--- 1.28/strings/strtod.c	2007-05-28 15:33:17 +04:00
+++ 1.29/strings/strtod.c	2007-05-28 21:43:27 +04:00
@@ -244,8 +244,8 @@ double my_strtod(const char *str, char *
     else
       step= array_elements(log_10) - 1;
     for (; exponent > step; exponent-= step)
-      result*= neg_exp ? log_01[step] : log_10[step];
-    result*= neg_exp ? log_01[exponent] : log_10[exponent];
+      result= neg_exp ? result / log_10[step] : result * log_10[step];
+    result= neg_exp ? result / log_10[exponent] : result * log_10[exponent];
   }
 
 done: