From b408c3fd00e6c2b53c2815c4c8513a3e71c289cf Mon Sep 17 00:00:00 2001
From: Jim Wilson <wilson@gcc.gnu.org>
Date: Fri, 10 Dec 1993 12:41:43 -0800
Subject: [PATCH] (yylex): When reading malformed floating point constant,

avoid printing error more than once, and avoid passing malformed
number to subsequent atof call.

From-SVN: r6201
---
 gcc/c-lex.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gcc/c-lex.c b/gcc/c-lex.c
index 98a9f83b0e4..b644d23177a 100644
--- a/gcc/c-lex.c
+++ b/gcc/c-lex.c
@@ -1330,10 +1330,16 @@ yylex ()
 	      {
 		if (base == 16)
 		  error ("floating constant may not be in radix 16");
-		if (floatflag == AFTER_POINT)
+		if (floatflag == TOO_MANY_POINTS)
+		  /* We have already emitted an error.  Don't need another.  */
+		  ;
+		else if (floatflag == AFTER_POINT)
 		  {
 		    error ("malformed floating constant");
 		    floatflag = TOO_MANY_POINTS;
+		    /* Avoid another error from atof by forcing all characters
+		       from here on to be ignored.  */
+		    p[-1] = '\0';
 		  }
 		else
 		  floatflag = AFTER_POINT;