NEWS.stable: log cherry-pick [e446f25]->[c092018] relocatable-shell: Update suggested...

[gnulib.git] / lib / xstrtod.c

diff --git a/lib/xstrtod.c b/lib/xstrtod.c
index 1a0b4d4..7caa615 100644 (file)
--- a/lib/xstrtod.c
+++ b/lib/xstrtod.c
@@ -1,10 +1,12 @@
 /* error-checking interface to strtod-like functions
-   Copyright (C) 1996, 1999, 2000, 2003 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   Copyright (C) 1996, 1999-2000, 2003-2006, 2009-2014 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -12,14 +14,11 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Jim Meyering.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 #include "xstrtod.h"
 
@@ -27,43 +26,46 @@
 #include <limits.h>
 #include <stdio.h>
 
-/* Tell the compiler that non-default rounding modes are used.  */
-#if 199901 <= __STDC_VERSION__
- #pragma STDC FENV_ACCESS ON
+#if LONG
+# define XSTRTOD xstrtold
+# define DOUBLE long double
+#else
+# define XSTRTOD xstrtod
+# define DOUBLE double
 #endif
 
-/* An interface to strtod that encapsulates all the error checking
-   one should usually perform.  Like strtod, but upon successful
-   conversion put the result in *RESULT and return zero.  Return
-   non-zero and don't modify *RESULT upon any failure.  CONVERT
+/* An interface to a string-to-floating-point conversion function that
+   encapsulates all the error checking one should usually perform.
+   Like strtod/strtold, but upon successful
+   conversion put the result in *RESULT and return true.  Return
+   false and don't modify *RESULT upon any failure.  CONVERT
    specifies the conversion function, e.g., strtod itself.  */
 
-int
-xstrtod (char const *str, char const **ptr, double *result,
-        double (*convert) (char const *, char **))
+bool
+XSTRTOD (char const *str, char const **ptr, DOUBLE *result,
+         DOUBLE (*convert) (char const *, char **))
 {
-  double val;
+  DOUBLE val;
   char *terminator;
-  int fail;
+  bool ok = true;
 
-  fail = 0;
   errno = 0;
   val = convert (str, &terminator);
 
   /* Having a non-zero terminator is an error only when PTR is NULL. */
   if (terminator == str || (ptr == NULL && *terminator != '\0'))
-    fail = 1;
+    ok = false;
   else
     {
-      /* Allow underflow (in which case strtod returns zero),
-        but flag overflow as an error. */
-      if (val != 0.0 && errno == ERANGE)
-       fail = 1;
+      /* Allow underflow (in which case CONVERT returns zero),
+         but flag overflow as an error. */
+      if (val != 0 && errno == ERANGE)
+        ok = false;
     }
 
   if (ptr != NULL)
     *ptr = terminator;
 
   *result = val;
-  return fail;
+  return ok;
 }