From 282b5da0c3d133fa7d6831e25a6729ebdcb02adc Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Tue, 6 Mar 2007 21:35:03 +0000
Subject: [PATCH] Botched the case for n=0

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@40 42af7a65-404d-4744-a932-0658087f49c3
---
 lib/lib_libvsprintf.c | 33 ++++++++++++++++++++++++---------
 1 file changed, 24 insertions(+), 9 deletions(-)

diff --git a/lib/lib_libvsprintf.c b/lib/lib_libvsprintf.c
index ebfd4dbea83..c4b34e7b6bd 100644
--- a/lib/lib_libvsprintf.c
+++ b/lib/lib_libvsprintf.c
@@ -270,15 +270,15 @@ static void utodec(struct lib_stream_s *obj, unsigned int n)
 
 static void utohex(struct lib_stream_s *obj, unsigned int n, ubyte a)
 {
-  boolean nonleading = FALSE;
+  boolean nonzero = FALSE;
   ubyte bits;
 
   for (bits = 8*sizeof(unsigned int); bits > 0; bits -= 4)
     {
       ubyte nibble = (ubyte)((n >> (bits - 4)) & 0xf);
-      if (nibble || nonleading)
+      if (nibble || nonzero)
         {
-          nonleading = TRUE;
+          nonzero = TRUE;
 
           if (nibble < 10)
             {
@@ -290,6 +290,11 @@ static void utohex(struct lib_stream_s *obj, unsigned int n, ubyte a)
             }
         }
     }
+
+  if (!nonzero)
+    {
+      obj->put(obj, '0');
+    }
 }
 
 /************************************************************
@@ -518,15 +523,15 @@ static void lutodec(struct lib_stream_s *obj, unsigned long n)
 
 static void lutohex(struct lib_stream_s *obj, unsigned long n, ubyte a)
 {
-  boolean nonleading = FALSE;
+  boolean nonzero = FALSE;
   ubyte bits;
 
   for (bits = 8*sizeof(unsigned long); bits > 0; bits -= 4)
     {
       ubyte nibble = (ubyte)((n >> (bits - 4)) & 0xf);
-      if (nibble || nonleading)
+      if (nibble || nonzero)
         {
-          nonleading = TRUE;
+          nonzero = TRUE;
 
           if (nibble < 10)
             {
@@ -538,6 +543,11 @@ static void lutohex(struct lib_stream_s *obj, unsigned long n, ubyte a)
             }
         }
     }
+
+  if (!nonzero)
+    {
+      obj->put(obj, '0');
+    }
 }
 
 /************************************************************
@@ -763,15 +773,15 @@ static void llutodec(struct lib_stream_s *obj, unsigned long long n)
 
 static void llutohex(struct lib_stream_s *obj, unsigned long long n, ubyte a)
 {
-  boolean nonleading = FALSE;
+  boolean nonzero = FALSE;
   ubyte bits;
 
   for (bits = 8*sizeof(unsigned long long); bits > 0; bits -= 4)
     {
       ubyte nibble = (ubyte)((n >> (bits - 4)) & 0xf);
-      if (nibble || nonleading)
+      if (nibble || nonzero)
         {
-          nonleading = TRUE;
+          nonzero = TRUE;
 
           if (nibble < 10)
             {
@@ -783,6 +793,11 @@ static void llutohex(struct lib_stream_s *obj, unsigned long long n, ubyte a)
             }
         }
     }
+
+  if (!nonzero)
+    {
+      obj->put(obj, '0');
+    }
 }
 
 /************************************************************