maint.mk: avoid sc_prohibit_always-defined_macros failure in coreutils

[gnulib.git] / lib / snprintf.c

diff --git a/lib/snprintf.c b/lib/snprintf.c
index c281f7c..dc435a0 100644 (file)
--- a/lib/snprintf.c
+++ b/lib/snprintf.c
@@ -1,5 +1,5 @@
 /* Formatted output to strings.
-   Copyright (C) 2004, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2006-2011 Free Software Foundation, Inc.
    Written by Simon Josefsson and Paul Eggert.
 
    This program is free software; you can redistribute it and/or modify
@@ -16,11 +16,10 @@
    with this program; if not, write to the Free Software Foundation,
    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
-#include "snprintf.h"
+/* Specification.  */
+#include <stdio.h>
 
 #include <errno.h>
 #include <limits.h>
@@ -30,26 +29,22 @@
 
 #include "vasnprintf.h"
 
-/* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW.  */
-#ifndef EOVERFLOW
-# define EOVERFLOW E2BIG
-#endif
-
 /* Print formatted output to string STR.  Similar to sprintf, but
    additional length SIZE limit how much is written into STR.  Returns
    string length of formatted string (which may be larger than SIZE).
    STR may be NULL, in which case nothing will be written.  On error,
-   return a negative value. */
+   return a negative value.  */
 int
 snprintf (char *str, size_t size, const char *format, ...)
 {
   char *output;
   size_t len;
+  size_t lenbuf = size;
   va_list args;
 
   va_start (args, format);
-  len = size;
-  output = vasnprintf (str, &len, format, args);
+  output = vasnprintf (str, &lenbuf, format, args);
+  len = lenbuf;
   va_end (args);
 
   if (!output)
@@ -58,10 +53,11 @@ snprintf (char *str, size_t size, const char *format, ...)
   if (output != str)
     {
       if (size)
-       {
-         memcpy (str, output, size - 1);
-         str[size - 1] = '\0';
-       }
+        {
+          size_t pruned_len = (len < size ? len : size - 1);
+          memcpy (str, output, pruned_len);
+          str[pruned_len] = '\0';
+        }
 
       free (output);
     }