make __dtoa & strtod() thread-safe useing the same method as newer gdtoa

codebase.  tested mostly by ckuethe and myself.  __dtoa() use now requires
a call to __freedtoa()

1 files changed, 4 insertions, 1 deletions

diff --git a/src/lib/libc/stdlib/gcvt.c b/src/lib/libc/stdlib/gcvt.c
index bc6295c03d..c24157e465 100644
--- a/src/lib/libc/stdlib/gcvt.c
+++ b/src/lib/libc/stdlib/gcvt.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: gcvt.c,v 1.9 2006/01/10 16:18:37 millert Exp $        */
+/*      $OpenBSD: gcvt.c,v 1.10 2006/10/29 18:45:56 deraadt Exp $       */
 
 /*
  * Copyright (c) 2002, 2003, 2006 Todd C. Miller <Todd.Miller@courtesan.com>
@@ -26,6 +26,7 @@
 #include <string.h>
 
 extern char *__dtoa(double, int, int, int *, int *, char **);
+extern void  __freedtoa(char *);
 
 char *
 gcvt(double value, int ndigit, char *buf)
@@ -48,6 +49,7 @@ gcvt(double value, int ndigit, char *buf)
                  */
                 snprintf(buf, ndigit + 1, "%s%s", sign ? "-" : "",
                     *digits == 'I' ? "inf" : "nan");
+                __freedtoa(digits);
                 return (buf);
         }
 
@@ -104,5 +106,6 @@ gcvt(double value, int ndigit, char *buf)
                 }
                 *dst = '\0';
         }
+        __freedtoa(digits);
         return (buf);
 }