421 lines
14 KiB
C
421 lines
14 KiB
C
/* Conversion from and to EUC-JISX0213.
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Copyright (C) 2002-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Bruno Haible <bruno@clisp.org>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <dlfcn.h>
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#include <stdint.h>
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#include <gconv.h>
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/* The structure of EUC-JISX0213 is as follows:
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0x00..0x7F: ASCII
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0x8E{A1..FE}: JISX0201 Katakana, with prefix 0x8E, offset by +0x80.
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0x8F{A1..FE}{A1..FE}: JISX0213 plane 2, with prefix 0x8F, offset by +0x8080.
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0x{A1..FE}{A1..FE}: JISX0213 plane 1, offset by +0x8080.
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Note that some JISX0213 characters are not contained in Unicode 3.2
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and are therefore best represented as sequences of Unicode characters.
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*/
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#include "jisx0213.h"
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/* Definitions used in the body of the `gconv' function. */
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#define CHARSET_NAME "EUC-JISX0213//"
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#define FROM_LOOP from_euc_jisx0213
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#define TO_LOOP to_euc_jisx0213
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#define DEFINE_INIT 1
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#define DEFINE_FINI 1
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#define FROM_LOOP_MIN_NEEDED_FROM 1
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#define FROM_LOOP_MAX_NEEDED_FROM 3
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#define FROM_LOOP_MIN_NEEDED_TO 4
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#define FROM_LOOP_MAX_NEEDED_TO 8
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#define TO_LOOP_MIN_NEEDED_FROM 4
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#define TO_LOOP_MAX_NEEDED_FROM 4
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#define TO_LOOP_MIN_NEEDED_TO 1
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#define TO_LOOP_MAX_NEEDED_TO 3
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#define PREPARE_LOOP \
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int saved_state; \
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int *statep = &data->__statep->__count;
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#define EXTRA_LOOP_ARGS , statep
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/* Since we might have to reset input pointer we must be able to save
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and restore the state. */
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#define SAVE_RESET_STATE(Save) \
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if (Save) \
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saved_state = *statep; \
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else \
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*statep = saved_state
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/* During EUC-JISX0213 to UCS-4 conversion, the COUNT element of the state
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contains the last UCS-4 character, shifted by 3 bits.
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During UCS-4 to EUC-JISX0213 conversion, the COUNT element of the state
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contains the last two bytes to be output, shifted by 3 bits. */
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/* Since this is a stateful encoding we have to provide code which resets
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the output state to the initial state. This has to be done during the
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flushing. */
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#define EMIT_SHIFT_TO_INIT \
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if (data->__statep->__count != 0) \
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{ \
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if (FROM_DIRECTION) \
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{ \
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if (__builtin_expect (outbuf + 4 <= outend, 1)) \
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{ \
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/* Write out the last character. */ \
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*((uint32_t *) outbuf) = data->__statep->__count >> 3; \
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outbuf += sizeof (uint32_t); \
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data->__statep->__count = 0; \
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} \
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else \
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/* We don't have enough room in the output buffer. */ \
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status = __GCONV_FULL_OUTPUT; \
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} \
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else \
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{ \
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if (__builtin_expect (outbuf + 2 <= outend, 1)) \
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{ \
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/* Write out the last character. */ \
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uint32_t lasttwo = data->__statep->__count >> 3; \
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*outbuf++ = (lasttwo >> 8) & 0xff; \
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*outbuf++ = lasttwo & 0xff; \
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data->__statep->__count = 0; \
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} \
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else \
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/* We don't have enough room in the output buffer. */ \
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status = __GCONV_FULL_OUTPUT; \
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} \
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}
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/* First define the conversion function from EUC-JISX0213 to UCS-4. */
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#define MIN_NEEDED_INPUT FROM_LOOP_MIN_NEEDED_FROM
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#define MAX_NEEDED_INPUT FROM_LOOP_MAX_NEEDED_FROM
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#define MIN_NEEDED_OUTPUT FROM_LOOP_MIN_NEEDED_TO
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#define MAX_NEEDED_OUTPUT FROM_LOOP_MAX_NEEDED_TO
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#define LOOPFCT FROM_LOOP
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#define BODY \
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{ \
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uint32_t ch; \
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\
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/* Determine whether there is a buffered character pending. */ \
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ch = *statep >> 3; \
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if (__builtin_expect (ch == 0, 1)) \
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{ \
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/* No - so look at the next input byte. */ \
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ch = *inptr; \
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\
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if (ch < 0x80) \
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/* Plain ASCII character. */ \
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++inptr; \
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else if ((ch >= 0xa1 && ch <= 0xfe) || ch == 0x8e || ch == 0x8f) \
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{ \
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/* Two or three byte character. */ \
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uint32_t ch2; \
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\
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if (__builtin_expect (inptr + 1 >= inend, 0)) \
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{ \
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/* The second byte is not available. */ \
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result = __GCONV_INCOMPLETE_INPUT; \
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break; \
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} \
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\
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ch2 = inptr[1]; \
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\
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/* The second byte must be >= 0xa1 and <= 0xfe. */ \
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if (__builtin_expect (ch2 < 0xa1 || ch2 > 0xfe, 0)) \
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{ \
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/* This is an illegal character. */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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} \
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\
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if (ch == 0x8e) \
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{ \
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/* Half-width katakana. */ \
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if (__builtin_expect (ch2 > 0xdf, 0)) \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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\
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ch = ch2 + 0xfec0; \
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inptr += 2; \
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} \
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else \
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{ \
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const unsigned char *endp; \
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\
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if (ch == 0x8f) \
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{ \
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/* JISX 0213 plane 2. */ \
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uint32_t ch3; \
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\
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if (__builtin_expect (inptr + 2 >= inend, 0)) \
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{ \
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/* The third byte is not available. */ \
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result = __GCONV_INCOMPLETE_INPUT; \
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break; \
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} \
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\
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ch3 = inptr[2]; \
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endp = inptr + 3; \
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\
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ch = jisx0213_to_ucs4 (0x200 - 0x80 + ch2, ch3 ^ 0x80); \
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} \
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else \
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{ \
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/* JISX 0213 plane 1. */ \
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endp = inptr + 2; \
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\
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ch = jisx0213_to_ucs4 (0x100 - 0x80 + ch, ch2 ^ 0x80); \
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} \
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\
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if (ch == 0) \
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/* This is an illegal character. */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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\
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inptr = endp; \
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\
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if (ch < 0x80) \
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{ \
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/* It's a combining character. */ \
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uint32_t u1 = __jisx0213_to_ucs_combining[ch - 1][0]; \
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uint32_t u2 = __jisx0213_to_ucs_combining[ch - 1][1]; \
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\
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put32 (outptr, u1); \
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outptr += 4; \
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\
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/* See whether we have room for two characters. */ \
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if (outptr + 4 <= outend) \
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{ \
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put32 (outptr, u2); \
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outptr += 4; \
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continue; \
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} \
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\
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/* Otherwise store only the first character now, and \
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put the second one into the queue. */ \
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*statep = u2 << 3; \
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/* Tell the caller why we terminate the loop. */ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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} \
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} \
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else \
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{ \
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/* This is illegal. */ \
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STANDARD_FROM_LOOP_ERR_HANDLER (1); \
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} \
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} \
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\
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put32 (outptr, ch); \
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outptr += 4; \
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}
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#define LOOP_NEED_FLAGS
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#define EXTRA_LOOP_DECLS , int *statep
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#define ONEBYTE_BODY \
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{ \
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if (c < 0x80) \
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return c; \
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else \
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return WEOF; \
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}
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#include <iconv/loop.c>
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/* Next, define the other direction, from UCS-4 to EUC-JISX0213. */
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/* Composition tables for each of the relevant combining characters. */
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static const struct
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{
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uint16_t base;
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uint16_t composed;
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} comp_table_data[] =
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{
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#define COMP_TABLE_IDX_02E5 0
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#define COMP_TABLE_LEN_02E5 1
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{ 0xabe4, 0xabe5 }, /* 0x12B65 = 0x12B64 U+02E5 */
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#define COMP_TABLE_IDX_02E9 (COMP_TABLE_IDX_02E5 + COMP_TABLE_LEN_02E5)
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#define COMP_TABLE_LEN_02E9 1
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{ 0xabe0, 0xabe6 }, /* 0x12B66 = 0x12B60 U+02E9 */
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#define COMP_TABLE_IDX_0300 (COMP_TABLE_IDX_02E9 + COMP_TABLE_LEN_02E9)
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#define COMP_TABLE_LEN_0300 5
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{ 0xa9dc, 0xabc4 }, /* 0x12B44 = 0x1295C U+0300 */
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{ 0xabb8, 0xabc8 }, /* 0x12B48 = 0x12B38 U+0300 */
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{ 0xabb7, 0xabca }, /* 0x12B4A = 0x12B37 U+0300 */
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{ 0xabb0, 0xabcc }, /* 0x12B4C = 0x12B30 U+0300 */
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{ 0xabc3, 0xabce }, /* 0x12B4E = 0x12B43 U+0300 */
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#define COMP_TABLE_IDX_0301 (COMP_TABLE_IDX_0300 + COMP_TABLE_LEN_0300)
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#define COMP_TABLE_LEN_0301 4
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{ 0xabb8, 0xabc9 }, /* 0x12B49 = 0x12B38 U+0301 */
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{ 0xabb7, 0xabcb }, /* 0x12B4B = 0x12B37 U+0301 */
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{ 0xabb0, 0xabcd }, /* 0x12B4D = 0x12B30 U+0301 */
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{ 0xabc3, 0xabcf }, /* 0x12B4F = 0x12B43 U+0301 */
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#define COMP_TABLE_IDX_309A (COMP_TABLE_IDX_0301 + COMP_TABLE_LEN_0301)
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#define COMP_TABLE_LEN_309A 14
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{ 0xa4ab, 0xa4f7 }, /* 0x12477 = 0x1242B U+309A */
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{ 0xa4ad, 0xa4f8 }, /* 0x12478 = 0x1242D U+309A */
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{ 0xa4af, 0xa4f9 }, /* 0x12479 = 0x1242F U+309A */
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{ 0xa4b1, 0xa4fa }, /* 0x1247A = 0x12431 U+309A */
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{ 0xa4b3, 0xa4fb }, /* 0x1247B = 0x12433 U+309A */
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{ 0xa5ab, 0xa5f7 }, /* 0x12577 = 0x1252B U+309A */
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{ 0xa5ad, 0xa5f8 }, /* 0x12578 = 0x1252D U+309A */
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{ 0xa5af, 0xa5f9 }, /* 0x12579 = 0x1252F U+309A */
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{ 0xa5b1, 0xa5fa }, /* 0x1257A = 0x12531 U+309A */
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{ 0xa5b3, 0xa5fb }, /* 0x1257B = 0x12533 U+309A */
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{ 0xa5bb, 0xa5fc }, /* 0x1257C = 0x1253B U+309A */
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{ 0xa5c4, 0xa5fd }, /* 0x1257D = 0x12544 U+309A */
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{ 0xa5c8, 0xa5fe }, /* 0x1257E = 0x12548 U+309A */
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{ 0xa6f5, 0xa6f8 }, /* 0x12678 = 0x12675 U+309A */
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};
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#define MIN_NEEDED_INPUT TO_LOOP_MIN_NEEDED_FROM
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#define MAX_NEEDED_INPUT TO_LOOP_MAX_NEEDED_FROM
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#define MIN_NEEDED_OUTPUT TO_LOOP_MIN_NEEDED_TO
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#define MAX_NEEDED_OUTPUT TO_LOOP_MAX_NEEDED_TO
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#define LOOPFCT TO_LOOP
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#define BODY \
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{ \
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uint32_t ch = get32 (inptr); \
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\
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if ((*statep >> 3) != 0) \
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{ \
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/* Attempt to combine the last character with this one. */ \
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uint16_t lasttwo = *statep >> 3; \
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unsigned int idx; \
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unsigned int len; \
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\
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if (ch == 0x02e5) \
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idx = COMP_TABLE_IDX_02E5, len = COMP_TABLE_LEN_02E5; \
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else if (ch == 0x02e9) \
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idx = COMP_TABLE_IDX_02E9, len = COMP_TABLE_LEN_02E9; \
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else if (ch == 0x0300) \
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idx = COMP_TABLE_IDX_0300, len = COMP_TABLE_LEN_0300; \
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else if (ch == 0x0301) \
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idx = COMP_TABLE_IDX_0301, len = COMP_TABLE_LEN_0301; \
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else if (ch == 0x309a) \
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idx = COMP_TABLE_IDX_309A, len = COMP_TABLE_LEN_309A; \
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else \
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goto not_combining; \
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\
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do \
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if (comp_table_data[idx].base == lasttwo) \
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break; \
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while (++idx, --len > 0); \
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\
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if (len > 0) \
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{ \
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/* Output the combined character. */ \
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if (__builtin_expect (outptr + 1 >= outend, 0)) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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lasttwo = comp_table_data[idx].composed; \
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*outptr++ = (lasttwo >> 8) & 0xff; \
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*outptr++ = lasttwo & 0xff; \
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*statep = 0; \
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inptr += 4; \
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continue; \
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} \
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\
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not_combining: \
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/* Output the buffered character. */ \
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if (__builtin_expect (outptr + 1 >= outend, 0)) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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*outptr++ = (lasttwo >> 8) & 0xff; \
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*outptr++ = lasttwo & 0xff; \
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*statep = 0; \
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continue; \
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} \
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\
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if (ch < 0x80) \
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/* Plain ASCII character. */ \
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*outptr++ = ch; \
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else if (ch >= 0xff61 && ch <= 0xff9f) \
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{ \
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/* Half-width katakana. */ \
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if (__builtin_expect (outptr + 1 >= outend, 0)) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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*outptr++ = 0x8e; \
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*outptr++ = ch - 0xfec0; \
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} \
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else \
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{ \
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uint32_t jch = ucs4_to_jisx0213 (ch); \
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if (jch == 0) \
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{ \
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UNICODE_TAG_HANDLER (ch, 4); \
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\
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/* Illegal character. */ \
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STANDARD_TO_LOOP_ERR_HANDLER (4); \
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} \
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\
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if (jch & 0x0080) \
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{ \
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/* A possible match in comp_table_data. We have to buffer it. */\
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\
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/* We know it's a JISX 0213 plane 1 character. */ \
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assert ((jch & 0x8000) == 0); \
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\
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*statep = (jch | 0x8080) << 3; \
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inptr += 4; \
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continue; \
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} \
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\
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if (jch & 0x8000) \
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{ \
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/* JISX 0213 plane 2. */ \
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if (__builtin_expect (outptr + 2 >= outend, 0)) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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*outptr++ = 0x8f; \
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} \
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else \
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{ \
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/* JISX 0213 plane 1. */ \
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if (__builtin_expect (outptr + 1 >= outend, 0)) \
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{ \
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result = __GCONV_FULL_OUTPUT; \
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break; \
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} \
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} \
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*outptr++ = (jch >> 8) | 0x80; \
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*outptr++ = (jch & 0xff) | 0x80; \
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} \
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\
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inptr += 4; \
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}
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#define LOOP_NEED_FLAGS
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#define EXTRA_LOOP_DECLS , int *statep
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#include <iconv/loop.c>
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/* Now define the toplevel functions. */
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#include <iconv/skeleton.c>
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