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-rw-r--r--erts/emulator/sys/win32/sys_float.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/erts/emulator/sys/win32/sys_float.c b/erts/emulator/sys/win32/sys_float.c
index 09dad89140..fb1ffc3089 100644
--- a/erts/emulator/sys/win32/sys_float.c
+++ b/erts/emulator/sys/win32/sys_float.c
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 1997-2011. All Rights Reserved.
+ * Copyright Ericsson AB 1997-2013. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -114,15 +114,16 @@ sys_chars_to_double(char *buf, double *fp)
/*
** Convert a double to ascii format 0.dddde[+|-]ddd
-** return number of characters converted
+** return number of characters converted or -1 if error.
*/
int
-sys_double_to_chars(double fp, char *buffer, size_t buffer_size)
+sys_double_to_chars_ext(double fp, char *buffer, size_t buffer_size, size_t decimals)
{
char *s = buffer;
-
- (void) erts_snprintf(buffer, buffer_size, "%.20e", fp);
+
+ if (erts_snprintf(buffer, buffer_size, "%.*e", decimals, fp) >= buffer_size)
+ return -1;
/* Search upto decimal point */
if (*s == '+' || *s == '-') s++;
while (isdigit(*s)) s++;