Fix estimate of size needed for a 'a' or 'A' conversion.

[gnulib.git] / lib / ucs4-utf8.h

diff --git a/lib/ucs4-utf8.h b/lib/ucs4-utf8.h
index 0757325..e8c3e7f 100644 (file)
--- a/lib/ucs4-utf8.h
+++ b/lib/ucs4-utf8.h
@@ -1,71 +1,35 @@
 /* Conversion UCS-4 to UTF-8.
-   Copyright (C) 2002 Free Software Foundation, Inc.
-   Written by Bruno Haible <haible@clisp.cons.org>, 2002.
+   Copyright (C) 2002, 2005-2007 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2002.
 
-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.
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Library General Public License as published
+   by the Free Software Foundation; either version 2, 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
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library 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.  */
+   You should have received a copy of the GNU Library General Public
+   License along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
 
+#ifndef _UCS4_UTF8_H
+#define _UCS4_UTF8_H
 
 #include <stddef.h>
+#include "unitypes.h"
+
+extern int u8_uctomb_aux (uint8_t *s, ucs4_t uc, int n);
 
 /* Return the length (number of units) of the UTF-8 representation of uc,
    after storing it at S.  Return -1 upon failure, -2 if the number of
    available units, N, is too small.  */
-static int
-u8_uctomb_aux (unsigned char *s, unsigned int uc, int n)
-{
-  int count;
-
-  if (uc < 0x80)
-    count = 1;
-  else if (uc < 0x800)
-    count = 2;
-  else if (uc < 0x10000)
-    count = 3;
-#if 0
-  else if (uc < 0x200000)
-    count = 4;
-  else if (uc < 0x4000000)
-    count = 5;
-  else if (uc <= 0x7fffffff)
-    count = 6;
-#else
-  else if (uc < 0x110000)
-    count = 4;
-#endif
-  else
-    return -1;
-
-  if (n < count)
-    return -2;
-
-  switch (count) /* note: code falls through cases! */
-    {
-#if 0
-    case 6: s[5] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x4000000;
-    case 5: s[4] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x200000;
-#endif
-    case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
-    case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
-    case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
-    case 1: s[0] = uc;
-    }
-  return count;
-}
-
 static inline int
-u8_uctomb (unsigned char *s, unsigned int uc, int n)
+u8_uctomb (uint8_t *s, ucs4_t uc, int n)
 {
   if (uc < 0x80 && n > 0)
     {
@@ -75,3 +39,5 @@ u8_uctomb (unsigned char *s, unsigned int uc, int n)
   else
     return u8_uctomb_aux (s, uc, n);
 }
+
+#endif /* _UCS4_UTF8_H */