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glibc/iconvdata/shift_jisx0213.c

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/* Conversion from and to Shift_JISX0213.
Copyright (C) 2002-2024 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 <gconv.h>
/* The structure of Shift_JISX0213 is as follows:
0x00..0x7F: ISO646-JP, an ASCII variant
0x{A1..DF}: JISX0201 Katakana.
0x{81..9F,E0..EF}{40..7E,80..FC}: JISX0213 plane 1.
0x{F0..FC}{40..7E,80..FC}: JISX0213 plane 2, with irregular row mapping.
Note that some JISX0213 characters are not contained in Unicode 3.2
and are therefore best represented as sequences of Unicode characters.
*/
#include "jisx0213.h"
/* Definitions used in the body of the `gconv' function. */
#define CHARSET_NAME "SHIFT_JISX0213//"
#define FROM_LOOP from_shift_jisx0213
#define TO_LOOP to_shift_jisx0213
#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 2
#define FROM_LOOP_MIN_NEEDED_TO 4
#define FROM_LOOP_MAX_NEEDED_TO 8
#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 Shift_JISX0213 to UCS-4 conversion, the COUNT element of the state
contains the last UCS-4 character, shifted by 3 bits.
During UCS-4 to Shift_JISX0213 conversion, the COUNT element of the state
contains the last two bytes to be output, 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 \
{ \
if (__glibc_likely (outbuf + 2 <= outend)) \
{ \
/* Write out the last character. */ \
uint32_t lasttwo = data->__statep->__count >> 3; \
*outbuf++ = (lasttwo >> 8) & 0xff; \
*outbuf++ = lasttwo & 0xff; \
data->__statep->__count = 0; \
} \
else \
/* We don't have enough room in the output buffer. */ \
status = __GCONV_FULL_OUTPUT; \
} \
}
/* First define the conversion function from Shift_JISX0213 to UCS-4. */
#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; \
\
/* Determine whether there is a buffered character pending. */ \
ch = *statep >> 3; \
if (__glibc_likely (ch == 0)) \
{ \
/* No - so look at the next input byte. */ \
ch = *inptr; \
\
if (ch < 0x80) \
{ \
/* Plain ISO646-JP character. */ \
if (__glibc_unlikely (ch == 0x5c)) \
ch = 0xa5; \
else if (__glibc_unlikely (ch == 0x7e)) \
ch = 0x203e; \
++inptr; \
} \
else if (ch >= 0xa1 && ch <= 0xdf) \
{ \
/* Half-width katakana. */ \
ch += 0xfec0; \
++inptr; \
} \
else if ((ch >= 0x81 && ch <= 0x9f) || (ch >= 0xe0 && ch <= 0xfc)) \
{ \
/* Two byte character. */ \
uint32_t ch2; \
\
if (__glibc_unlikely (inptr + 1 >= inend)) \
{ \
/* The second byte is not available. */ \
result = __GCONV_INCOMPLETE_INPUT; \
break; \
} \
\
ch2 = inptr[1]; \
\
/* The second byte must be in the range 0x{40..7E,80..FC}. */ \
if (__glibc_unlikely (ch2 < 0x40 || ch2 == 0x7f || ch2 > 0xfc)) \
{ \
/* This is an illegal character. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
\
/* Convert to row and column. */ \
if (ch < 0xe0) \
ch -= 0x81; \
else \
ch -= 0xc1; \
if (ch2 < 0x80) \
ch2 -= 0x40; \
else \
ch2 -= 0x41; \
/* Now 0 <= ch <= 0x3b, 0 <= ch2 <= 0xbb. */ \
ch = 2 * ch; \
if (ch2 >= 0x5e) \
ch2 -= 0x5e, ch++; \
ch2 += 0x21; \
if (ch >= 0x5e) \
{ \
/* Handling of JISX 0213 plane 2 rows. */ \
if (ch >= 0x67) \
ch += 230; \
else if (ch >= 0x63 || ch == 0x5f) \
ch += 168; \
else \
ch += 162; \
} \
\
ch = jisx0213_to_ucs4 (0x121 + ch, ch2); \
\
if (ch == 0) \
{ \
/* This is an illegal character. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
\
inptr += 2; \
\
if (ch < 0x80) \
{ \
/* It's a combining character. */ \
uint32_t u1 = __jisx0213_to_ucs_combining[ch - 1][0]; \
uint32_t u2 = __jisx0213_to_ucs_combining[ch - 1][1]; \
\
put32 (outptr, u1); \
outptr += 4; \
\
/* See whether we have room for two characters. */ \
if (outptr + 4 <= outend) \
{ \
put32 (outptr, u2); \
outptr += 4; \
continue; \
} \
\
/* Otherwise store only the first character now, and \
put the second one into the queue. */ \
*statep = u2 << 3; \
/* Tell the caller why we terminate the loop. */ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
} \
else \
{ \
/* This is illegal. */ \
STANDARD_FROM_LOOP_ERR_HANDLER (1); \
} \
} \
\
put32 (outptr, ch); \
outptr += 4; \
}
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS , int *statep
#define ONEBYTE_BODY \
{ \
if (c < 0x80) \
{ \
if (c == 0x5c) \
return 0xa5; \
if (c == 0x7e) \
return 0x203e; \
return c; \
} \
if (c >= 0xa1 && c <= 0xdf) \
return 0xfec0 + c; \
return WEOF; \
}
#include <iconv/loop.c>
/* Next, define the other direction, from UCS-4 to Shift_JISX0213. */
/* Composition tables for each of the relevant combining characters. */
static const struct
{
uint16_t base;
uint16_t composed;
} comp_table_data[] =
{
#define COMP_TABLE_IDX_02E5 0
#define COMP_TABLE_LEN_02E5 1
{ 0x8684, 0x8685 }, /* 0x12B65 = 0x12B64 U+02E5 */
#define COMP_TABLE_IDX_02E9 (COMP_TABLE_IDX_02E5 + COMP_TABLE_LEN_02E5)
#define COMP_TABLE_LEN_02E9 1
{ 0x8680, 0x8686 }, /* 0x12B66 = 0x12B60 U+02E9 */
#define COMP_TABLE_IDX_0300 (COMP_TABLE_IDX_02E9 + COMP_TABLE_LEN_02E9)
#define COMP_TABLE_LEN_0300 5
{ 0x857b, 0x8663 }, /* 0x12B44 = 0x1295C U+0300 */
{ 0x8657, 0x8667 }, /* 0x12B48 = 0x12B38 U+0300 */
{ 0x8656, 0x8669 }, /* 0x12B4A = 0x12B37 U+0300 */
{ 0x864f, 0x866b }, /* 0x12B4C = 0x12B30 U+0300 */
{ 0x8662, 0x866d }, /* 0x12B4E = 0x12B43 U+0300 */
#define COMP_TABLE_IDX_0301 (COMP_TABLE_IDX_0300 + COMP_TABLE_LEN_0300)
#define COMP_TABLE_LEN_0301 4
{ 0x8657, 0x8668 }, /* 0x12B49 = 0x12B38 U+0301 */
{ 0x8656, 0x866a }, /* 0x12B4B = 0x12B37 U+0301 */
{ 0x864f, 0x866c }, /* 0x12B4D = 0x12B30 U+0301 */
{ 0x8662, 0x866e }, /* 0x12B4F = 0x12B43 U+0301 */
#define COMP_TABLE_IDX_309A (COMP_TABLE_IDX_0301 + COMP_TABLE_LEN_0301)
#define COMP_TABLE_LEN_309A 14
{ 0x82a9, 0x82f5 }, /* 0x12477 = 0x1242B U+309A */
{ 0x82ab, 0x82f6 }, /* 0x12478 = 0x1242D U+309A */
{ 0x82ad, 0x82f7 }, /* 0x12479 = 0x1242F U+309A */
{ 0x82af, 0x82f8 }, /* 0x1247A = 0x12431 U+309A */
{ 0x82b1, 0x82f9 }, /* 0x1247B = 0x12433 U+309A */
{ 0x834a, 0x8397 }, /* 0x12577 = 0x1252B U+309A */
{ 0x834c, 0x8398 }, /* 0x12578 = 0x1252D U+309A */
{ 0x834e, 0x8399 }, /* 0x12579 = 0x1252F U+309A */
{ 0x8350, 0x839a }, /* 0x1257A = 0x12531 U+309A */
{ 0x8352, 0x839b }, /* 0x1257B = 0x12533 U+309A */
{ 0x835a, 0x839c }, /* 0x1257C = 0x1253B U+309A */
{ 0x8363, 0x839d }, /* 0x1257D = 0x12544 U+309A */
{ 0x8367, 0x839e }, /* 0x1257E = 0x12548 U+309A */
{ 0x83f3, 0x83f6 }, /* 0x12678 = 0x12675 U+309A */
};
#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); \
\
if ((*statep >> 3) != 0) \
{ \
/* Attempt to combine the last character with this one. */ \
uint16_t lasttwo = *statep >> 3; \
unsigned int idx; \
unsigned int len; \
\
if (ch == 0x02e5) \
idx = COMP_TABLE_IDX_02E5, len = COMP_TABLE_LEN_02E5; \
else if (ch == 0x02e9) \
idx = COMP_TABLE_IDX_02E9, len = COMP_TABLE_LEN_02E9; \
else if (ch == 0x0300) \
idx = COMP_TABLE_IDX_0300, len = COMP_TABLE_LEN_0300; \
else if (ch == 0x0301) \
idx = COMP_TABLE_IDX_0301, len = COMP_TABLE_LEN_0301; \
else if (ch == 0x309a) \
idx = COMP_TABLE_IDX_309A, len = COMP_TABLE_LEN_309A; \
else \
goto not_combining; \
\
do \
if (comp_table_data[idx].base == lasttwo) \
break; \
while (++idx, --len > 0); \
\
if (len > 0) \
{ \
/* Output the combined character. */ \
if (__glibc_unlikely (outptr + 1 >= outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
lasttwo = comp_table_data[idx].composed; \
*outptr++ = (lasttwo >> 8) & 0xff; \
*outptr++ = lasttwo & 0xff; \
*statep = 0; \
inptr += 4; \
continue; \
} \
\
not_combining: \
/* Output the buffered character. */ \
if (__glibc_unlikely (outptr + 1 >= outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
*outptr++ = (lasttwo >> 8) & 0xff; \
*outptr++ = lasttwo & 0xff; \
*statep = 0; \
continue; \
} \
\
if (ch < 0x80) \
/* Plain ISO646-JP character. */ \
*outptr++ = ch; \
else if (ch == 0xa5) \
*outptr++ = 0x5c; \
else if (ch == 0x203e) \
*outptr++ = 0x7e; \
else if (ch >= 0xff61 && ch <= 0xff9f) \
/* Half-width katakana. */ \
*outptr++ = ch - 0xfec0; \
else \
{ \
unsigned int s1, s2; \
uint32_t jch = ucs4_to_jisx0213 (ch); \
if (jch == 0) \
{ \
UNICODE_TAG_HANDLER (ch, 4); \
\
/* Illegal character. */ \
STANDARD_TO_LOOP_ERR_HANDLER (4); \
} \
\
/* Convert it to shifted representation. */ \
s1 = jch >> 8; \
s2 = jch & 0x7f; \
s1 -= 0x21; \
s2 -= 0x21; \
if (s1 >= 0x5e) \
{ \
/* Handling of JISX 0213 plane 2 rows. */ \
if (s1 >= 0xcd) /* rows 0x26E..0x27E */ \
s1 -= 102; \
else if (s1 >= 0x8b || s1 == 0x87) /* rows 0x228, 0x22C..0x22F */ \
s1 -= 40; \
else /* rows 0x221, 0x223..0x225 */ \
s1 -= 34; \
/* Now 0x5e <= s1 <= 0x77. */ \
} \
if (s1 & 1) \
s2 += 0x5e; \
s1 = s1 >> 1; \
if (s1 < 0x1f) \
s1 += 0x81; \
else \
s1 += 0xc1; \
if (s2 < 0x3f) \
s2 += 0x40; \
else \
s2 += 0x41; \
\
if (jch & 0x0080) \
{ \
/* A possible match in comp_table_data. We have to buffer it. */\
\
/* We know it's a JISX 0213 plane 1 character. */ \
assert ((jch & 0x8000) == 0); \
\
*statep = ((s1 << 8) | s2) << 3; \
inptr += 4; \
continue; \
} \
\
/* Output the shifted representation. */ \
if (__glibc_unlikely (outptr + 1 >= outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
*outptr++ = s1; \
*outptr++ = s2; \
} \
\
inptr += 4; \
}
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS , int *statep
#include <iconv/loop.c>
/* Now define the toplevel functions. */
#include <iconv/skeleton.c>
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