path: root/iconvdata/cp1258.c

/* Conversion from and to CP1258.
   Copyright (C) 1998-2025 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <dlfcn.h>
#include <stdint.h>
#include <assert.h>
#include <stdlib.h>

#define NELEMS(arr) (sizeof (arr) / sizeof (arr[0]))

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME		"CP1258//"
#define FROM_LOOP		from_cp1258
#define TO_LOOP			to_cp1258
#define DEFINE_INIT		1
#define DEFINE_FINI		1
#define ONE_DIRECTION		0
#define FROM_LOOP_MIN_NEEDED_FROM	1
#define FROM_LOOP_MAX_NEEDED_FROM	1
#define FROM_LOOP_MIN_NEEDED_TO		4
#define FROM_LOOP_MAX_NEEDED_TO		4
#define TO_LOOP_MIN_NEEDED_FROM		4
#define TO_LOOP_MAX_NEEDED_FROM		4
#define TO_LOOP_MIN_NEEDED_TO		1
#define TO_LOOP_MAX_NEEDED_TO		2
#define PREPARE_LOOP \
  int saved_state;							      \
  int *statep = &data->__statep->__count;
#define EXTRA_LOOP_ARGS		, statep


/* Since we might have to reset input pointer we must be able to save
   and restore the state.  */
#define SAVE_RESET_STATE(Save) \
  if (Save)								      \
    saved_state = *statep;						      \
  else									      \
    *statep = saved_state


/* During CP1258 to UCS4 conversion, the COUNT element of the state
   contains the last UCS4 character, shifted by 3 bits.  */


/* Since this is a stateful encoding we have to provide code which resets
   the output state to the initial state.  This has to be done during the
   flushing.  */
#define EMIT_SHIFT_TO_INIT \
  if (data->__statep->__count != 0)					      \
    {									      \
      if (FROM_DIRECTION)						      \
	{								      \
	  if (__glibc_likely (outbuf + 4 <= outend))			      \
	    {								      \
	      /* Write out the last character.  */			      \
	      *((uint32_t *) outbuf) = data->__statep->__count >> 3;	      \
	      outbuf += sizeof (uint32_t);				      \
	      data->__statep->__count = 0;				      \
	    }								      \
	  else								      \
	    /* We don't have enough room in the output buffer.  */	      \
	    status = __GCONV_FULL_OUTPUT;				      \
	}								      \
      else								      \
	/* We don't use shift states in the TO_DIRECTION.  */		      \
	data->__statep->__count = 0;					      \
    }


/* First define the conversion function from CP1258 to UCS4.  */

static const uint16_t to_ucs4[128] =
  {
    /* 0x80 */
    0x20AC,      0, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021,
    0x02C6, 0x2030,      0, 0x2039, 0x0152,      0,      0,      0,
    /* 0x90 */
	 0, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
    0x02DC, 0x2122,      0, 0x203A, 0x0153,      0,      0, 0x0178,
    /* 0xA0 */
    0x00A0,