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235 lines
7.7 KiB
C
235 lines
7.7 KiB
C
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/* Conversion from and to IBM943.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Masahide Washizawa <washi@jp.ibm.com>, 2000.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "ibm943.h"
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#ifndef TRUE
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#define TRUE 1
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#define FALSE 0
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#endif
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#define FROM 0
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#define TO 1
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/* Definitions used in the body of the `gconv' function. */
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#define CHARSET_NAME "IBM943//"
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#define FROM_LOOP from_ibm943
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#define TO_LOOP to_ibm943
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/* Definitions of initialization and destructor function. */
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#define DEFINE_INIT 1
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#define DEFINE_FINI 1
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#define MIN_NEEDED_FROM 1
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#define MAX_NEEDED_FROM 2
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#define MIN_NEEDED_TO 4
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/* First, define the conversion function from IBM-943 to UCS4. */
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#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
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#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
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#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
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#define LOOPFCT FROM_LOOP
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#define BODY \
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{ \
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const struct gap *rp1 = __ibm943sb_to_ucs4_idx; \
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const struct gap *rp2 = __ibm943db_to_ucs4_idx; \
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uint32_t ch = *inptr; \
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uint32_t res; \
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\
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if (__builtin_expect (ch, 0) >= 0xffff) \
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{ \
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rp1 = NULL; \
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rp2 = NULL; \
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} \
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else if (__builtin_expect (ch, 0) == 0x80 \
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|| __builtin_expect (ch, 0) == 0xa0 \
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|| __builtin_expect (ch, 0) == 0xfd \
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|| __builtin_expect (ch, 0) == 0xfe \
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|| __builtin_expect (ch, 0) == 0xff) \
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{ \
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/* This is an illegal character. */ \
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if (! ignore_errors_p ()) \
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{ \
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result = __GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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} \
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else \
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{ \
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while (ch > rp1->end) \
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++rp1; \
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} \
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\
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/* Use the IBM943 table for single byte. */ \
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if (__builtin_expect (rp1 == NULL, 0) \
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|| __builtin_expect (ch < rp1->start, 0) \
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|| (res = __ibm943sb_to_ucs4[ch + rp1->idx], \
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__builtin_expect (res, '\1') == 0 && ch != 0)) \
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{ \
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\
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/* Use the IBM943 table for double byte. */ \
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if (__builtin_expect (inptr + 1 >= inend, 0)) \
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{ \
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/* The second character is not available. \
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Store the intermediate result. */ \
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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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ch = (ch * 0x100) + inptr[1]; \
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while (ch > rp2->end) \
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++rp2; \
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\
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if (__builtin_expect (rp2 == NULL, 0) \
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|| __builtin_expect (ch < rp2->start, 0) \
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|| (res = __ibm943db_to_ucs4[ch + rp2->idx], \
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__builtin_expect (res, '\1') == 0 && ch !=0)) \
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{ \
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/* This is an illegal character. */ \
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if (! ignore_errors_p ()) \
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{ \
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result = __GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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++*irreversible; \
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inptr += 2; \
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continue; \
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} \
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else \
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{ \
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put32 (outptr, res); \
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outptr += 4; \
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inptr += 2; \
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} \
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} \
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else \
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{ \
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if (res == 0x1c) \
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res = 0x1a; \
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else if (res == 0x7f) \
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res = 0x1c; \
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else if (res == 0xa5) \
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res = 0x5c; \
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else if (res == 0x203e) \
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res = 0x7e; \
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else if (res == 0x1a) \
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res = 0x7f; \
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put32 (outptr, res); \
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outptr += 4; \
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inptr++; \
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} \
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}
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#define LOOP_NEED_FLAGS
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#include <iconv/loop.c>
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/* Next, define the other direction. */
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#define MIN_NEEDED_INPUT MIN_NEEDED_TO
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#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
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#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
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#define LOOPFCT TO_LOOP
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#define BODY \
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{ \
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const struct gap *rp = __ucs4_to_ibm943sb_idx; \
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unsigned char sc; \
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uint32_t ch = get32(inptr); \
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uint16_t found = TRUE; \
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uint32_t i; \
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uint32_t low; \
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uint32_t high; \
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uint16_t pccode; \
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\
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if (__builtin_expect (ch, 0) >= 0xffff) \
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rp = NULL; \
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else \
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while (ch > rp->end) \
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++rp; \
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\
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/* Use the UCS4 table for single byte. */ \
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if (__builtin_expect (rp == NULL, 0) \
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|| __builtin_expect (ch < rp->start, 0) \
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|| (sc = __ucs4_to_ibm943sb[ch + rp->idx], \
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__builtin_expect (sc, '\1') == '\0' && ch != L'\0')) \
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{ \
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\
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/* Use the UCS4 table for double byte. */ \
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found = FALSE; \
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low = 0; \
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high = (sizeof (__ucs4_to_ibm943db) >> 1) \
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/ sizeof (__ucs4_to_ibm943db[0][FROM]); \
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pccode = ch; \
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while (low <= high) \
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{ \
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i = (low + high) >> 1; \
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if (pccode < __ucs4_to_ibm943db[i][FROM]) \
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high = i - 1; \
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else if (pccode > __ucs4_to_ibm943db[i][FROM]) \
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low = i + 1; \
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else \
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{ \
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pccode = __ucs4_to_ibm943db[i][TO]; \
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found = TRUE; \
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break; \
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} \
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} \
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if (found) \
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{ \
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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++ = pccode >> 8 & 0xff; \
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*outptr++ = pccode & 0xff; \
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} \
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else \
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{ \
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/* This is an illegal character. */ \
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if (! ignore_errors_p ()) \
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{ \
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result = __GCONV_ILLEGAL_INPUT; \
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break; \
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} \
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++*irreversible; \
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} \
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} \
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else \
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{ \
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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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if (ch == 0x5c) \
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*outptr++ = 0x5c; \
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else if (ch == 0x7e) \
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*outptr++ = 0x7e; \
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else \
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*outptr++ = sc; \
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} \
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\
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/* Now that we wrote the output increment the input pointer. */ \
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inptr += 4; \
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}
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#define LOOP_NEED_FLAGS
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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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