[thirdparty/glibc.git] / iconvdata / ibm937.c

/* Conversion from and to IBM937.
   Copyright (C) 2000-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Masahide Washizawa <washi@yamato.ibm.co.jp>, 2000.

   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/>.  */

#include <dlfcn.h>
#include <stdint.h>
#include <wchar.h>
#include <byteswap.h>
#include "ibm937.h"

/* The shift sequences for this charset (it does not use ESC).  */
#define SI 		0x0F  /* Shift In, host code to turn DBCS off.  */
#define SO 		0x0E  /* Shift Out, host code to turn DBCS on.  */

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME	"IBM937//"
#define FROM_LOOP	from_ibm937
#define TO_LOOP		to_ibm937
#define	ONE_DIRECTION			0
#define FROM_LOOP_MIN_NEEDED_FROM	1
#define FROM_LOOP_MAX_NEEDED_FROM	2
#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		3
#define PREPARE_LOOP \
  int save_curcs;							      \
  int *curcsp = &data->__statep->__count;
#define EXTRA_LOOP_ARGS		, curcsp

/* Definitions of initialization and destructor function.  */
#define DEFINE_INIT	1
#define DEFINE_FINI	1


/* 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 & ~7) != sb)				      \
    {									      \
      if (FROM_DIRECTION)						      \
	data->__statep->__count &= 7;					      \
      else								      \
	{								      \
	  /* We are not in the initial state.  To switch back we have	      \
	     to emit `SI'.  */						      \
	  if (__glibc_unlikely (outbuf >= outend))			      \
	    /* We don't have enough room in the output buffer.  */	      \
	    status = __GCONV_FULL_OUTPUT;				      \
	  else								      \
	    {								      \
	      /* Write out the shift sequence.  */			      \
	      *outbuf++ = SI;						      \
	      data->__statep->__count &= 7;				      \
	    }								      \
	}								      \
    }


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


/* Current codeset type.  */
enum
{
  sb = 0,
  db = 64
};

/* First, define the conversion function from IBM-937 to UCS4.  */
#define MIN_NEEDED_INPUT	FROM_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	FROM_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	FROM_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	FROM_LOOP_MAX_NEEDED_TO
#define LOOPFCT 		FROM_LOOP
#define BODY \
  {									      \
    uint32_t ch = *inptr;						      \
    uint32_t res;							      \
									      \
    if (__builtin_expect (ch, 0) == SO)					      \
      {									      \
	/* Shift OUT, change to DBCS converter.  */			      \
	if (curcs == db)						      \
	  {								      \
	    result = __GCONV_ILLEGAL_INPUT;				      \
	    break;							      \
	  }								      \
	curcs = db;							      \
	++inptr;							      \
	continue;							      \
      }									      \
    else if (__builtin_expect (ch, 0) == SI)				      \
      {									      \
	/* Shift IN, change to SBCS converter.  */			      \
	if (curcs == sb)						      \
	  {								      \
	    result = __GCONV_ILLEGAL_INPUT;				      \
	    break;							      \
	  }								      \
	curcs = sb;							      \
	++inptr;							      \
	continue;							      \
      }									      \
									      \
    if (curcs == sb)							      \
      {									      \
	/* Use the IBM937 table for single byte.  */			      \
	res = __ibm937sb_to_ucs4[ch];					      \
	if (__builtin_expect (res, L'\1') == L'\0' && ch != '\0')	      \
	  {								      \
	    /* This is an illegal character.  */			      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
	  }								      \
	else								      \
	  {								      \
	    put32 (outptr, res);					      \
	    outptr += 4;						      \
	  }								      \
	++inptr;							      \
      }									      \
    else								      \
      {									      \
	const struct gap *rp2 = __ibm937db_to_ucs4_idx;			      \
									      \
	assert (curcs == db);						      \
									      \
	/* Use the IBM937 table for double byte.  */			      \
	if (__glibc_unlikely (inptr + 1 >= inend))			      \
	  {								      \
	    /* The second character is not available.			      \
	       Store the intermediate result. */			      \
	    result = __GCONV_INCOMPLETE_INPUT;				      \
	    break;							      \
	  }								      \
									      \
	ch = (ch * 0x100) + inptr[1];					      \
	while (ch > rp2->end)						      \
	  ++rp2;							      \
									      \
	if (__builtin_expect (rp2->start == 0xffff, 0)			      \
	    || __builtin_expect (ch < rp2->start, 0)			      \
	    || (res = __ibm937db_to_ucs4[ch + rp2->idx],		      \
		__builtin_expect (res, L'\1') == L'\0' && ch != '\0'))	      \
	  {								      \
	    /* This is an illegal character.  */			      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (2);				      \
	  }								      \
	else								      \
	  {								      \
	    put32 (outptr, res);					      \
	    outptr += 4;						      \
	  }								      \
	inptr += 2;							      \
      }									      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *curcsp
#define INIT_PARAMS		int curcs = *curcsp & ~7
#define UPDATE_PARAMS		*curcsp = curcs
#include <iconv/loop.c>

/* Next, define the other direction.  */
#define MIN_NEEDED_INPUT	TO_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	TO_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	TO_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	TO_LOOP_MAX_NEEDED_TO
#define LOOPFCT			TO_LOOP
#define BODY \
  {									      \
    uint32_t ch = get32 (inptr);					      \
    const struct gap *rp1 = __ucs4_to_ibm937sb_idx;			      \
    const struct gap *rp2 = __ucs4_to_ibm937db_idx;			      \
    const char *cp;							      \
									      \
    if (__glibc_unlikely (ch >= 0xffff))				      \
      {									      \
	UNICODE_TAG_HANDLER (ch, 4);					      \
									      \
	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
      }									      \
									      \
    while (ch > rp1->end)						      \
      ++rp1;								      \
									      \
    /* Use the UCS4 table for single byte.  */				      \
    if (__builtin_expect (ch < rp1->start, 0)				      \
	|| (cp = __ucs4_to_ibm937sb[ch + rp1->idx],			      \
	    __builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0'))	      \
      {									      \
	/* Use the UCS4 table for double byte. */			      \
	while (ch > rp2->end)						      \
	  ++rp2;							      \
									      \
	if (__builtin_expect (ch < rp2->start, 0)			      \
	    || (cp = __ucs4_to_ibm937db[ch + rp2->idx],			      \
		__builtin_expect (cp[0], L'\1')==L'\0' && ch != '\0'))	      \
	  {								      \
	    /* This is an illegal character.  */			      \
	    STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
	  }								      \
	else								      \
	  {								      \
	    if (curcs == sb)						      \
	      {								      \
		if (__glibc_unlikely (outptr + 1 > outend))		      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
		*outptr++ = SO;						      \
		curcs = db;						      \
	      }								      \
									      \
	    if (__glibc_unlikely (outptr + 2 > outend))			      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    *outptr++ = cp[0];						      \
	    *outptr++ = cp[1];						      \
	  }								      \
      }									      \
    else								      \
      {									      \
	if (curcs == db)						      \
	  {								      \
	    if (__glibc_unlikely (outptr + 1 > outend))			      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    *outptr++ = SI;						      \
	  }								      \
									      \
	if (__glibc_unlikely (outptr + 1 > outend))			      \
	  {								      \
	    result = __GCONV_FULL_OUTPUT;				      \
	    break;							      \
	  }								      \
	*outptr++ = cp[0];						      \
	curcs = sb;							      \
      }									      \
									      \
    /* Now that we wrote the output increment the input pointer.  */	      \
    inptr += 4;								      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *curcsp
#define INIT_PARAMS		int curcs = *curcsp & ~7
#define REINIT_PARAMS		curcs = *curcsp & ~7
#define UPDATE_PARAMS		*curcsp = curcs
#include <iconv/loop.c>

/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>
Commit	Line	Data
29132b91	1	/* Conversion from and to IBM937.
d4697bc9	2	Copyright (C) 2000-2014 Free Software Foundation, Inc.
dbd10df7 UD	3	This file is part of the GNU C Library.
	4	Contributed by Masahide Washizawa <washi@yamato.ibm.co.jp>, 2000.
	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.
dbd10df7 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.
dbd10df7	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/>. */
dbd10df7 UD	19
	20	#include <dlfcn.h>
	21	#include <stdint.h>
	22	#include <wchar.h>
	23	#include <byteswap.h>
	24	#include "ibm937.h"
	25
	26	/* The shift sequences for this charset (it does not use ESC). */
	27	#define SI 0x0F /* Shift In, host code to turn DBCS off. */
	28	#define SO 0x0E /* Shift Out, host code to turn DBCS on. */
	29
	30	/* Definitions used in the body of the `gconv' function. */
	31	#define CHARSET_NAME "IBM937//"
	32	#define FROM_LOOP from_ibm937
	33	#define TO_LOOP to_ibm937
13e402e7	34	#define ONE_DIRECTION 0
faaa6f62 UD	35	#define FROM_LOOP_MIN_NEEDED_FROM 1
	36	#define FROM_LOOP_MAX_NEEDED_FROM 2
	37	#define FROM_LOOP_MIN_NEEDED_TO 4
	38	#define FROM_LOOP_MAX_NEEDED_TO 4
	39	#define TO_LOOP_MIN_NEEDED_FROM 4
	40	#define TO_LOOP_MAX_NEEDED_FROM 4
	41	#define TO_LOOP_MIN_NEEDED_TO 1
	42	#define TO_LOOP_MAX_NEEDED_TO 3
f1813b56 UD	43	#define PREPARE_LOOP \
	44	int save_curcs; \
	45	int *curcsp = &data->__statep->__count;
	46	#define EXTRA_LOOP_ARGS , curcsp
dbd10df7 UD	47
	48	/* Definitions of initialization and destructor function. */
	49	#define DEFINE_INIT 1
	50	#define DEFINE_FINI 1
	51
f1813b56 UD	52
	53	/* Since this is a stateful encoding we have to provide code which resets
	54	the output state to the initial state. This has to be done during the
	55	flushing. */
	56	#define EMIT_SHIFT_TO_INIT \
	57	if ((data->__statep->__count & ~7) != sb) \
	58	{ \
	59	if (FROM_DIRECTION) \
	60	data->__statep->__count &= 7; \
	61	else \
	62	{ \
f1813b56 UD	63	/* We are not in the initial state. To switch back we have \
f1813b56 UD	64	to emit `SI'. */ \
a1ffb40e	65	if (__glibc_unlikely (outbuf >= outend)) \
f1813b56 UD	66	/* We don't have enough room in the output buffer. */ \
	67	status = __GCONV_FULL_OUTPUT; \
	68	else \
	69	{ \
	70	/* Write out the shift sequence. */ \
	71	*outbuf++ = SI; \
f1813b56 UD	72	data->__statep->__count &= 7; \
	73	} \
	74	} \
	75	}
	76
	77
	78	/* Since we might have to reset input pointer we must be able to save
	79	and retore the state. */
	80	#define SAVE_RESET_STATE(Save) \
	81	if (Save) \
	82	save_curcs = *curcsp; \
	83	else \
	84	*curcsp = save_curcs
	85
dbd10df7 UD	86
	87	/* Current codeset type. */
	88	enum
	89	{
f1813b56 UD	90	sb = 0,
f1813b56 UD	91	db = 64
dbd10df7 UD	92	};
	93
	94	/* First, define the conversion function from IBM-937 to UCS4. */
faaa6f62 UD	95	#define MIN_NEEDED_INPUT FROM_LOOP_MIN_NEEDED_FROM
	96	#define MAX_NEEDED_INPUT FROM_LOOP_MAX_NEEDED_FROM
	97	#define MIN_NEEDED_OUTPUT FROM_LOOP_MIN_NEEDED_TO
	98	#define MAX_NEEDED_OUTPUT FROM_LOOP_MAX_NEEDED_TO
dbd10df7 UD	99	#define LOOPFCT FROM_LOOP
	100	#define BODY \
	101	{ \
	102	uint32_t ch = *inptr; \
29132b91	103	uint32_t res; \
dbd10df7 UD	104	\
	105	if (__builtin_expect (ch, 0) == SO) \
	106	{ \
dbd10df7 UD	107	/* Shift OUT, change to DBCS converter. */ \
	108	if (curcs == db) \
	109	{ \
	110	result = __GCONV_ILLEGAL_INPUT; \
	111	break; \
	112	} \
	113	curcs = db; \
	114	++inptr; \
f1813b56	115	continue; \
dbd10df7 UD	116	} \
	117	else if (__builtin_expect (ch, 0) == SI) \
	118	{ \
dbd10df7 UD	119	/* Shift IN, change to SBCS converter. */ \
	120	if (curcs == sb) \
	121	{ \
	122	result = __GCONV_ILLEGAL_INPUT; \
	123	break; \
	124	} \
	125	curcs = sb; \
	126	++inptr; \
f1813b56	127	continue; \
dbd10df7 UD	128	} \
dbd10df7 UD	129	\
f1813b56	130	if (curcs == sb) \
dbd10df7	131	{ \
29132b91 UD	132	/* Use the IBM937 table for single byte. */ \
	133	res = __ibm937sb_to_ucs4[ch]; \
	134	if (__builtin_expect (res, L'\1') == L'\0' && ch != '\0') \
dbd10df7 UD	135	{ \
dbd10df7 UD	136	/* This is an illegal character. */ \
e438a468	137	STANDARD_FROM_LOOP_ERR_HANDLER (1); \
dbd10df7 UD	138	} \
	139	else \
	140	{ \
29132b91	141	put32 (outptr, res); \
dbd10df7	142	outptr += 4; \
dbd10df7	143	} \
f1813b56	144	++inptr; \
dbd10df7	145	} \
f1813b56	146	else \
dbd10df7	147	{ \
29132b91	148	const struct gap *rp2 = __ibm937db_to_ucs4_idx; \
f1813b56 UD	149	\
	150	assert (curcs == db); \
	151	\
29132b91	152	/* Use the IBM937 table for double byte. */ \
a1ffb40e	153	if (__glibc_unlikely (inptr + 1 >= inend)) \
29132b91 UD	154	{ \
	155	/* The second character is not available. \
	156	Store the intermediate result. */ \
	157	result = __GCONV_INCOMPLETE_INPUT; \
	158	break; \
	159	} \
	160	\
	161	ch = (ch * 0x100) + inptr[1]; \
	162	while (ch > rp2->end) \
	163	++rp2; \
	164	\
41488498	165	if (__builtin_expect (rp2->start == 0xffff, 0) \
29132b91 UD	166	\|\| __builtin_expect (ch < rp2->start, 0) \
	167	\|\| (res = __ibm937db_to_ucs4[ch + rp2->idx], \
	168	__builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \
dbd10df7 UD	169	{ \
dbd10df7 UD	170	/* This is an illegal character. */ \
e438a468	171	STANDARD_FROM_LOOP_ERR_HANDLER (2); \
dbd10df7 UD	172	} \
	173	else \
	174	{ \
29132b91	175	put32 (outptr, res); \
dbd10df7	176	outptr += 4; \
dbd10df7	177	} \
f1813b56	178	inptr += 2; \
dbd10df7 UD	179	} \
	180	}
	181	#define LOOP_NEED_FLAGS
f1813b56 UD	182	#define EXTRA_LOOP_DECLS , int *curcsp
	183	#define INIT_PARAMS int curcs = *curcsp & ~7
	184	#define UPDATE_PARAMS *curcsp = curcs
dbd10df7 UD	185	#include <iconv/loop.c>
	186
	187	/* Next, define the other direction. */
faaa6f62 UD	188	#define MIN_NEEDED_INPUT TO_LOOP_MIN_NEEDED_FROM
	189	#define MAX_NEEDED_INPUT TO_LOOP_MAX_NEEDED_FROM
	190	#define MIN_NEEDED_OUTPUT TO_LOOP_MIN_NEEDED_TO
	191	#define MAX_NEEDED_OUTPUT TO_LOOP_MAX_NEEDED_TO
dbd10df7 UD	192	#define LOOPFCT TO_LOOP
	193	#define BODY \
	194	{ \
	195	uint32_t ch = get32 (inptr); \
29132b91 UD	196	const struct gap *rp1 = __ucs4_to_ibm937sb_idx; \
29132b91 UD	197	const struct gap *rp2 = __ucs4_to_ibm937db_idx; \
dbd10df7 UD	198	const char *cp; \
dbd10df7 UD	199	\
a1ffb40e	200	if (__glibc_unlikely (ch >= 0xffff)) \
dbd10df7	201	{ \
29132b91 UD	202	UNICODE_TAG_HANDLER (ch, 4); \
29132b91 UD	203	\
e438a468	204	STANDARD_TO_LOOP_ERR_HANDLER (4); \
29132b91	205	} \
601d2942	206	\
29132b91 UD	207	while (ch > rp1->end) \
	208	++rp1; \
	209	\
	210	/* Use the UCS4 table for single byte. */ \
	211	if (__builtin_expect (ch < rp1->start, 0) \
	212	\|\| (cp = __ucs4_to_ibm937sb[ch + rp1->idx], \
	213	__builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0')) \
	214	{ \
	215	/* Use the UCS4 table for double byte. */ \
	216	while (ch > rp2->end) \
	217	++rp2; \
	218	\
	219	if (__builtin_expect (ch < rp2->start, 0) \
	220	\|\| (cp = __ucs4_to_ibm937db[ch + rp2->idx], \
	221	__builtin_expect (cp[0], L'\1')==L'\0' && ch != '\0')) \
	222	{ \
dbd10df7	223	/* This is an illegal character. */ \
e438a468	224	STANDARD_TO_LOOP_ERR_HANDLER (4); \
dbd10df7 UD	225	} \
	226	else \
	227	{ \
f1813b56	228	if (curcs == sb) \
dbd10df7	229	{ \
a1ffb40e	230	if (__glibc_unlikely (outptr + 1 > outend)) \
29132b91 UD	231	{ \
	232	result = __GCONV_FULL_OUTPUT; \
	233	break; \
	234	} \
dbd10df7	235	*outptr++ = SO; \
dbd10df7 UD	236	curcs = db; \
dbd10df7 UD	237	} \
29132b91	238	\
a1ffb40e	239	if (__glibc_unlikely (outptr + 2 > outend)) \
531950ce UD	240	{ \
	241	result = __GCONV_FULL_OUTPUT; \
	242	break; \
	243	} \
dbd10df7 UD	244	*outptr++ = cp[0]; \
	245	*outptr++ = cp[1]; \
	246	} \
	247	} \
	248	else \
	249	{ \
	250	if (curcs == db) \
	251	{ \
a1ffb40e	252	if (__glibc_unlikely (outptr + 1 > outend)) \
dbd10df7 UD	253	{ \
	254	result = __GCONV_FULL_OUTPUT; \
	255	break; \
	256	} \
29132b91 UD	257	*outptr++ = SI; \
	258	} \
	259	\
a1ffb40e	260	if (__glibc_unlikely (outptr + 1 > outend)) \
29132b91 UD	261	{ \
	262	result = __GCONV_FULL_OUTPUT; \
	263	break; \
dbd10df7	264	} \
dbd10df7	265	*outptr++ = cp[0]; \
29132b91	266	curcs = sb; \
dbd10df7 UD	267	} \
	268	\
	269	/* Now that we wrote the output increment the input pointer. */ \
	270	inptr += 4; \
	271	}
	272	#define LOOP_NEED_FLAGS
f1813b56 UD	273	#define EXTRA_LOOP_DECLS , int *curcsp
f1813b56 UD	274	#define INIT_PARAMS int curcs = *curcsp & ~7
4b1b449d	275	#define REINIT_PARAMS curcs = *curcsp & ~7
f1813b56	276	#define UPDATE_PARAMS *curcsp = curcs
dbd10df7 UD	277	#include <iconv/loop.c>
	278
	279	/* Now define the toplevel functions. */
	280	#include <iconv/skeleton.c>