From ea31b613feba1c5f34ff2cf9f2c0bab3be4f8d2a Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Thu, 16 Jan 2003 02:27:47 +0000
Subject: Update.

	* iconv/gconv_simple.c (STORE_REST): Explicitly store the total
	expected size into state.
	(UNPACK_BYTES): Do the reverse.
	* wcsmbs/tst-mbrtowc.c (utf8_test_1): Add test for the bug.
	Reported by Al Viro <aviro@redhat.com>.
---
 iconv/gconv_simple.c | 44 +++++++++++++-------------------------------
 1 file changed, 13 insertions(+), 31 deletions(-)

(limited to 'iconv/gconv_simple.c')

diff --git a/iconv/gconv_simple.c b/iconv/gconv_simple.c
index 3937b95c92..124c8e7727 100644
--- a/iconv/gconv_simple.c
+++ b/iconv/gconv_simple.c
@@ -1,5 +1,5 @@
 /* Simple transformations functions.
-   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -1031,7 +1031,7 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
        correct and that it requires a larger number of bytes than there	      \
        are in the input buffer.  */					      \
     wint_t ch = **inptrp;						      \
-    size_t cnt;								      \
+    size_t cnt, r;							      \
 									      \
     state->__count = inend - *inptrp;					      \
 									      \
@@ -1069,16 +1069,19 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
       }									      \
 									      \
     /* The first byte is already consumed.  */				      \
-    --cnt;								      \
+    r = cnt - 1;							      \
     while (++(*inptrp) < inend)						      \
       {									      \
 	ch <<= 6;							      \
 	ch |= **inptrp & 0x3f;						      \
-	--cnt;								      \
+	--r;								      \
       }									      \
 									      \
     /* Shift for the so far missing bytes.  */				      \
-    ch <<= cnt * 6;							      \
+    ch <<= r * 6;							      \
+									      \
+    /* Store the number of bytes expected for the entire sequence.  */	      \
+    ch = ch << 3 | cnt;							      \
 									      \
     /* Store the value.  */						      \
     state->__value.__wch = ch;						      \
@@ -1086,35 +1089,14 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
 
 #define UNPACK_BYTES \
   {									      \
+    static const unsigned char inmask[5] = { 0xc0, 0xe0, 0xf0, 0xf8, 0xfc };  \
     wint_t wch = state->__value.__wch;					      \
-    size_t ntotal;							      \
+    size_t ntotal = wch & 7;						      \
+    wch >>= 3;								      \
+									      \
     inlen = state->__count;						      \
 									      \
-    if (state->__value.__wch <= 0x7ff)					      \
-      {									      \
-	bytebuf[0] = 0xc0;						      \
-	ntotal = 2;							      \
-      }									      \
-    else if (__builtin_expect (state->__value.__wch <= 0xffff, 1))	      \
-      {									      \
-	bytebuf[0] = 0xe0;						      \
-	ntotal = 3;							      \
-      }									      \
-    else if (__builtin_expect (state->__value.__wch < 0x1fffff, 1))	      \
-      {									      \
-	bytebuf[0] = 0xf0;						      \
-	ntotal = 4;							      \
-      }									      \
-    else if (__builtin_expect (state->__value.__wch < 0x3ffffff, 1))	      \
-      {									      \
-	bytebuf[0] = 0xf8;						      \
-	ntotal = 5;							      \
-      }									      \
-    else								      \
-      {									      \
-	bytebuf[0] = 0xfc;						      \
-	ntotal = 6;							      \
-      }									      \
+    bytebuf[0] = inmask[ntotal - 2];					      \
 									      \
     do									      \
       {									      \
-- 
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