LCOV - code coverage report
Current view: top level - lib/gl/unistr/unistr - u8-uctomb-aux.c (source / functions) Hit Total Coverage
Test: GNU Libidn Lines: 20 20 100.0 %
Date: 2015-03-02 11:46:03 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* Conversion UCS-4 to UTF-8.
       2             :    Copyright (C) 2002, 2006-2007, 2009-2015 Free Software Foundation, Inc.
       3             :    Written by Bruno Haible <bruno@clisp.org>, 2002.
       4             : 
       5             :    This program is free software: you can redistribute it and/or modify it
       6             :    under the terms of the GNU Lesser General Public License as published
       7             :    by the Free Software Foundation; either version 2.1 of the License, or
       8             :    (at your option) any later version.
       9             : 
      10             :    This program is distributed in the hope that it will be useful,
      11             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      12             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13             :    Lesser General Public License for more details.
      14             : 
      15             :    You should have received a copy of the GNU Lesser General Public License
      16             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      17             : 
      18             : #include <config.h>
      19             : 
      20             : /* Specification.  */
      21             : #include "unistr.h"
      22             : 
      23             : int
      24         165 : u8_uctomb_aux (uint8_t *s, ucs4_t uc, int n)
      25             : {
      26             :   int count;
      27             : 
      28         165 :   if (uc < 0x80)
      29             :     /* The case n >= 1 is already handled by the caller.  */
      30         128 :     return -2;
      31          37 :   else if (uc < 0x800)
      32           3 :     count = 2;
      33          34 :   else if (uc < 0x10000)
      34             :     {
      35          24 :       if (uc < 0xd800 || uc >= 0xe000)
      36           4 :         count = 3;
      37             :       else
      38          20 :         return -1;
      39             :     }
      40             : #if 0
      41             :   else if (uc < 0x200000)
      42             :     count = 4;
      43             :   else if (uc < 0x4000000)
      44             :     count = 5;
      45             :   else if (uc <= 0x7fffffff)
      46             :     count = 6;
      47             : #else
      48          10 :   else if (uc < 0x110000)
      49           5 :     count = 4;
      50             : #endif
      51             :   else
      52           5 :     return -1;
      53             : 
      54          12 :   if (n < count)
      55           9 :     return -2;
      56             : 
      57           3 :   switch (count) /* note: code falls through cases! */
      58             :     {
      59             : #if 0
      60             :     case 6: s[5] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x4000000;
      61             :     case 5: s[4] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x200000;
      62             : #endif
      63           1 :     case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
      64           2 :     case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
      65           3 :     case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
      66           3 :   /*case 1:*/ s[0] = uc;
      67             :     }
      68           3 :   return count;
      69             : }

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