# HG changeset patch
# User Eric Blake <ebb9@byu.net>
# Date 1222127662 -7200
# Node ID 3e1c3b04eec2593cdf47c165c5168c4a9342a66d
# Parent  203312d94de66ba4d36b5012d6a1025dee12d13b
vasnprintf: fix x86/glibc regression on printf("%La", 0.0L)

diff -r 203312d94de6 -r 3e1c3b04eec2 ChangeLog
--- a/ChangeLog	Mon Sep 22 01:13:00 2008 +0200
+++ b/ChangeLog	Tue Sep 23 01:54:22 2008 +0200
@@ -1,3 +1,11 @@
+2008-09-22  Eric Blake  <ebb9@byu.net>
+            Bruno Haible  <bruno@clisp.org>
+
+	vasnprintf: fix x86/glibc regression on printf("%La", 0.0L)
+	* lib/vasnprintf.c (VASNPRINTF): Support 0.0 on platforms that
+	supply %A but mishandle pseudo-NaN.
+	Reported by Simon Josefsson.
+
 2008-09-21  Bruno Haible  <bruno@clisp.org>
 
 	* tests/test-lock.c (main): Tweak skip message.
diff -r 203312d94de6 -r 3e1c3b04eec2 lib/vasnprintf.c
--- a/lib/vasnprintf.c	Mon Sep 22 01:13:00 2008 +0200
+++ b/lib/vasnprintf.c	Tue Sep 23 01:54:22 2008 +0200
@@ -2663,9 +2663,11 @@
 
 		/* POSIX specifies the default precision to be 6 for %f, %F,
 		   %e, %E, but not for %g, %G.  Implementations appear to use
-		   the same default precision also for %g, %G.  */
+		   the same default precision also for %g, %G.  But for %a, %A,
+		   the default precision is 0.  */
 		if (!has_precision)
-		  precision = 6;
+		  if (!(dp->conversion == 'a' || dp->conversion == 'A'))
+		    precision = 6;
 
 		/* Allocate a temporary buffer of sufficient size.  */
 # if NEED_PRINTF_DOUBLE && NEED_PRINTF_LONG_DOUBLE
@@ -3182,6 +3184,22 @@
 				      *p++ = '0';
 				  }
 			      }
+			    else if (dp->conversion == 'a' || dp->conversion == 'A')
+			      {
+				*p++ = '0';
+				*p++ = dp->conversion - 'A' + 'X';
+				pad_ptr = p;
+				*p++ = '0';
+				if ((flags & FLAG_ALT) || precision > 0)
+				  {
+				    *p++ = decimal_point_char ();
+				    for (; precision > 0; precision--)
+				      *p++ = '0';
+				  }
+				*p++ = dp->conversion - 'A' + 'P';
+				*p++ = '+';
+				*p++ = '0';
+			      }
 			    else
 			      abort ();
 #  endif