1  /* Generic conversion to and from 8bit charsets.
       2     Copyright (C) 1997-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library 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
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <dlfcn.h>
      20  #include <stdint.h>
      21  
      22  #define FROM_LOOP		from_generic
      23  #define TO_LOOP			to_generic
      24  #define DEFINE_INIT		1
      25  #define DEFINE_FINI		1
      26  #define MIN_NEEDED_FROM		1
      27  #define MIN_NEEDED_TO		4
      28  #define ONE_DIRECTION		0
      29  
      30  
      31  /* First define the conversion function from the 8bit charset to UCS4.  */
      32  #define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
      33  #define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
      34  #define LOOPFCT			FROM_LOOP
      35  #define BODY \
      36    {									      \
      37      uint32_t ch = to_ucs4[*inptr];					      \
      38  									      \
      39      if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && *inptr != '\0')     \
      40        {									      \
      41  	/* This is an illegal character.  */				      \
      42  	STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
      43        }									      \
      44  									      \
      45      put32 (outptr, ch);							      \
      46      outptr += 4;							      \
      47      ++inptr;								      \
      48    }
      49  #define LOOP_NEED_FLAGS
      50  #define ONEBYTE_BODY \
      51    {									      \
      52      uint32_t ch = to_ucs4[c];						      \
      53  									      \
      54      if (HAS_HOLES && __builtin_expect (ch == L'\0', 0) && c != '\0')	      \
      55        return WEOF;							      \
      56      else								      \
      57        return ch;							      \
      58    }
      59  #include <iconv/loop.c>
      60  
      61  
      62  /* Next, define the other direction.  */
      63  #define MIN_NEEDED_INPUT	MIN_NEEDED_TO
      64  #define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM
      65  #define LOOPFCT			TO_LOOP
      66  #define BODY \
      67    {									      \
      68      uint32_t ch = get32 (inptr);					      \
      69  									      \
      70      if (__builtin_expect (ch >= sizeof (from_ucs4) / sizeof (from_ucs4[0]), 0)\
      71  	|| (__builtin_expect (from_ucs4[ch], '\1') == '\0' && ch != 0))	      \
      72        {									      \
      73  	UNICODE_TAG_HANDLER (ch, 4);					      \
      74  									      \
      75  	/* This is an illegal character.  */				      \
      76  	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
      77        }									      \
      78  									      \
      79      *outptr++ = from_ucs4[ch];						      \
      80      inptr += 4;								      \
      81    }
      82  #define LOOP_NEED_FLAGS
      83  #include <iconv/loop.c>
      84  
      85  
      86  /* Now define the toplevel functions.  */
      87  #include <iconv/skeleton.c>