[thirdparty/glibc.git] / iconvdata / jis0208.h

/* Access functions for JISX0208 conversion.
   Copyright (C) 1997-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.

   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
   <http://www.gnu.org/licenses/>.  */

#ifndef _JIS0208_H
#define _JIS0208_H	1

#include <gconv.h>
#include <stdint.h>

/* Struct for table with indeces in UCS mapping table.  */
struct jisx0208_ucs_idx
{
  uint16_t start;
  uint16_t end;
  uint16_t idx;
};


/* Conversion table.  */
extern const uint16_t __jis0208_to_ucs[];

#define JIS0208_LAT1_MIN 0xa2
#define JIS0208_LAT1_MAX 0xf7
extern const char __jisx0208_from_ucs4_lat1[JIS0208_LAT1_MAX + 1
					    - JIS0208_LAT1_MIN][2];
extern const char __jisx0208_from_ucs4_greek[0xc1][2];
extern const struct jisx0208_ucs_idx __jisx0208_from_ucs_idx[];
extern const char __jisx0208_from_ucs_tab[][2];


static inline uint32_t
__attribute ((always_inline))
jisx0208_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
{
  unsigned char ch = *(*s);
  unsigned char ch2;
  int idx;

  if (ch < offset || (ch - offset) <= 0x20)
    return __UNKNOWN_10646_CHAR;

  if (avail < 2)
    return 0;

  ch2 = (*s)[1];
  if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
    return __UNKNOWN_10646_CHAR;

  idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
  if (idx >= 0x1e80)
    return __UNKNOWN_10646_CHAR;

  (*s) += 2;

  return __jis0208_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
}


static inline size_t
__attribute ((always_inline))
ucs4_to_jisx0208 (uint32_t wch, unsigned char *s, size_t avail)
{
  unsigned int ch = (unsigned int) wch;
  const char *cp;

  if (avail < 2)
    return 0;

  if (ch >= JIS0208_LAT1_MIN && ch <= JIS0208_LAT1_MAX)
    cp = __jisx0208_from_ucs4_lat1[ch - JIS0208_LAT1_MIN];
  else if (ch >= 0x391 && ch <= 0x451)
    cp = __jisx0208_from_ucs4_greek[ch - 0x391];
  else
    {
      const struct jisx0208_ucs_idx *rp = __jisx0208_from_ucs_idx;

      if (ch >= 0xffff)
	return __UNKNOWN_10646_CHAR;
      while (ch > rp->end)
	++rp;
      if (ch >= rp->start)
	cp = __jisx0208_from_ucs_tab[rp->idx + ch - rp->start];
      else
	return __UNKNOWN_10646_CHAR;
    }

  if (cp[0] == '\0')
    return __UNKNOWN_10646_CHAR;

  s[0] = cp[0];
  s[1] = cp[1];

  return 2;
}

#endif /* jis0208.h */
Commit	Line	Data
04be94a8	1	/* Access functions for JISX0208 conversion.
d4697bc9	2	Copyright (C) 1997-2014 Free Software Foundation, Inc.
04be94a8 UD	3	This file is part of the GNU C Library.
	4	Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
04be94a8 UD	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	14	Lesser General Public License for more details.
04be94a8	15
41bdb6e2	16	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
04be94a8 UD	19
	20	#ifndef _JIS0208_H
	21	#define _JIS0208_H 1
	22
	23	#include <gconv.h>
2aea1d79	24	#include <stdint.h>
04be94a8	25
04be94a8 UD	26	/* Struct for table with indeces in UCS mapping table. */
	27	struct jisx0208_ucs_idx
	28	{
	29	uint16_t start;
	30	uint16_t end;
	31	uint16_t idx;
	32	};
	33
	34
4bae262d UD	35	/* Conversion table. */
	36	extern const uint16_t __jis0208_to_ucs[];
	37
294bda1b UD	38	#define JIS0208_LAT1_MIN 0xa2
	39	#define JIS0208_LAT1_MAX 0xf7
	40	extern const char __jisx0208_from_ucs4_lat1[JIS0208_LAT1_MAX + 1
	41	- JIS0208_LAT1_MIN][2];
4bae262d UD	42	extern const char __jisx0208_from_ucs4_greek[0xc1][2];
	43	extern const struct jisx0208_ucs_idx __jisx0208_from_ucs_idx[];
	44	extern const char __jisx0208_from_ucs_tab[][2];
	45
	46
8619129f	47	static inline uint32_t
dd9423a6	48	__attribute ((always_inline))
8619129f	49	jisx0208_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
04be94a8 UD	50	{
	51	unsigned char ch = (s);
	52	unsigned char ch2;
	53	int idx;
	54
044ff622	55	if (ch < offset \|\| (ch - offset) <= 0x20)
d64b6ad0	56	return __UNKNOWN_10646_CHAR;
04be94a8 UD	57
	58	if (avail < 2)
	59	return 0;
	60
	61	ch2 = (*s)[1];
2b474353	62	if (ch2 < offset \|\| (ch2 - offset) <= 0x20 \|\| (ch2 - offset) >= 0x7f)
d64b6ad0	63	return __UNKNOWN_10646_CHAR;
04be94a8	64
2b474353	65	idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
04be94a8	66	if (idx >= 0x1e80)
d64b6ad0	67	return __UNKNOWN_10646_CHAR;
04be94a8 UD	68
	69	(*s) += 2;
	70
d64b6ad0	71	return __jis0208_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
04be94a8 UD	72	}
	73
	74
	75	static inline size_t
dd9423a6	76	__attribute ((always_inline))
085a4412	77	ucs4_to_jisx0208 (uint32_t wch, unsigned char *s, size_t avail)
04be94a8 UD	78	{
04be94a8 UD	79	unsigned int ch = (unsigned int) wch;
8619129f	80	const char *cp;
04be94a8 UD	81
	82	if (avail < 2)
	83	return 0;
	84
294bda1b UD	85	if (ch >= JIS0208_LAT1_MIN && ch <= JIS0208_LAT1_MAX)
294bda1b UD	86	cp = __jisx0208_from_ucs4_lat1[ch - JIS0208_LAT1_MIN];
04be94a8	87	else if (ch >= 0x391 && ch <= 0x451)
5c2a0669	88	cp = __jisx0208_from_ucs4_greek[ch - 0x391];
04be94a8 UD	89	else
04be94a8 UD	90	{
8619129f	91	const struct jisx0208_ucs_idx *rp = __jisx0208_from_ucs_idx;
04be94a8	92
8619129f	93	if (ch >= 0xffff)
d64b6ad0	94	return __UNKNOWN_10646_CHAR;
04be94a8 UD	95	while (ch > rp->end)
	96	++rp;
	97	if (ch >= rp->start)
8619129f UD	98	cp = __jisx0208_from_ucs_tab[rp->idx + ch - rp->start];
8619129f UD	99	else
d64b6ad0	100	return __UNKNOWN_10646_CHAR;
04be94a8 UD	101	}
04be94a8 UD	102
8619129f	103	if (cp[0] == '\0')
d64b6ad0	104	return __UNKNOWN_10646_CHAR;
04be94a8	105
2b474353 UD	106	s[0] = cp[0];
2b474353 UD	107	s[1] = cp[1];
04be94a8 UD	108
	109	return 2;
	110	}
	111
	112	#endif /* jis0208.h */