397 lines
12 KiB
C
397 lines
12 KiB
C
/* Conversion from and to IBM1364.
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Copyright (C) 2005-2017 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>, 2005.
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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 <wchar.h>
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#include <byteswap.h>
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#ifndef CHARSET_NAME
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/* This is really the IBM1364 converter, not another module sharing
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the code. */
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# define DATA_HEADER "ibm1364.h"
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# define CHARSET_NAME "IBM1364//"
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# define FROM_LOOP from_ibm1364
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# define TO_LOOP to_ibm1364
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# define SB_TO_UCS4 __ibm1364sb_to_ucs4
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# define DB_TO_UCS4_IDX __ibm1364db_to_ucs4_idx
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# define DB_TO_UCS4 __ibm1364db_to_ucs4
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# define UCS4_TO_SB_IDX __ucs4_to_ibm1364sb_idx
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# define UCS4_TO_SB __ucs4_to_ibm1364sb
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# define UCS4_TO_DB_IDX __ucs4_to_ibm1364db_idx
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# define UCS4_TO_DB __ucs4_to_ibm1364db
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# define UCS_LIMIT 0xffff
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#endif
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#include DATA_HEADER
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/* The shift sequences for this charset (it does not use ESC). */
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#define SI 0x0F /* Shift In, host code to turn DBCS off. */
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#define SO 0x0E /* Shift Out, host code to turn DBCS on. */
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/* Definitions used in the body of the `gconv' function. */
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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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#ifdef HAS_COMBINED
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# define MAX_NEEDED_TO 8
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#else
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# define MAX_NEEDED_TO 4
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#endif
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#define ONE_DIRECTION 0
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#define PREPARE_LOOP \
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int save_curcs; \
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int *curcsp = &data->__statep->__count;
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#define EXTRA_LOOP_ARGS , curcsp
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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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/* 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 & ~7) != sb) \
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{ \
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if (FROM_DIRECTION) \
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data->__statep->__count &= 7; \
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else \
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{ \
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/* We are not in the initial state. To switch back we have \
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to emit `SI'. */ \
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if (__glibc_unlikely (outbuf >= outend)) \
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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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else \
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{ \
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/* Write out the shift sequence. */ \
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*outbuf++ = SI; \
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data->__statep->__count &= 7; \
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} \
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} \
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}
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/* Since we might have to reset input pointer we must be able to save
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and retore the state. */
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#define SAVE_RESET_STATE(Save) \
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if (Save) \
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save_curcs = *curcsp; \
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else \
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*curcsp = save_curcs
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/* Current codeset type. */
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enum
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{
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sb = 0,
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db = 64
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};
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/* Subroutine to write out converted UCS4 from IBM-13XX. */
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#ifdef HAS_COMBINED
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# define SUB_COMBINED_UCS_FROM_IBM13XX \
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{ \
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if (res != UCS_LIMIT || ch < __TO_UCS4_COMBINED_MIN \
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|| ch > __TO_UCS4_COMBINED_MAX) \
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{ \
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put32 (outptr, res); \
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outptr += 4; \
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} \
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else \
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{ \
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/* This is a combined character. Make sure we have room. */ \
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if (__glibc_unlikely (outptr + 8 > outend)) \
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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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const struct divide *cmbp \
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= &DB_TO_UCS4_COMB[ch - __TO_UCS4_COMBINED_MIN]; \
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assert (cmbp->res1 != 0 && cmbp->res2 != 0); \
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\
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put32 (outptr, cmbp->res1); \
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outptr += 4; \
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put32 (outptr, cmbp->res2); \
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outptr += 4; \
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} \
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}
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#else
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# define SUB_COMBINED_UCS_FROM_IBM13XX \
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{ \
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put32 (outptr, res); \
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outptr += 4; \
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}
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#endif /* HAS_COMBINED */
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/* First, define the conversion function from IBM-13XX 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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uint32_t ch = *inptr; \
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\
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if (__builtin_expect (ch, 0) == SO) \
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{ \
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/* Shift OUT, change to DBCS converter. */ \
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if (curcs == db) \
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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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curcs = db; \
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++inptr; \
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continue; \
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} \
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if (__builtin_expect (ch, 0) == SI) \
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{ \
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/* Shift IN, change to SBCS converter. */ \
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if (curcs == sb) \
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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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curcs = sb; \
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++inptr; \
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continue; \
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} \
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\
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if (curcs == sb) \
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{ \
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/* Use the IBM13XX table for single byte. */ \
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uint32_t res = SB_TO_UCS4[ch]; \
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if (__builtin_expect (res, L'\1') == L'\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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} \
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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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} \
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++inptr; \
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} \
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else \
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{ \
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assert (curcs == db); \
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\
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if (__glibc_unlikely (inptr + 1 >= inend)) \
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{ \
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/* The second character is not available. Store the \
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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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\
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/* Use the IBM1364 table for double byte. */ \
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const struct gap *rp2 = DB_TO_UCS4_IDX; \
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while (ch > rp2->end) \
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++rp2; \
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\
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uint32_t res; \
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if (__builtin_expect (rp2->start == 0xffff, 0) \
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|| __builtin_expect (ch < rp2->start, 0) \
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|| (res = DB_TO_UCS4[ch + rp2->idx], \
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__builtin_expect (res, L'\1') == L'\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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} \
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else \
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{ \
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SUB_COMBINED_UCS_FROM_IBM13XX; \
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} \
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inptr += 2; \
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} \
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}
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#define LOOP_NEED_FLAGS
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#define EXTRA_LOOP_DECLS , int *curcsp
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#define INIT_PARAMS int curcs = *curcsp & ~7
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#define UPDATE_PARAMS *curcsp = curcs
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#include <iconv/loop.c>
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/* Subroutine to convert two UCS4 codes to IBM-13XX. */
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#ifdef HAS_COMBINED
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# define SUB_COMBINED_UCS_TO_IBM13XX \
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{ \
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const struct combine *cmbp = UCS4_COMB_TO_DB; \
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while (cmbp->res1 < ch) \
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++cmbp; \
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/* XXX if last char is beginning of combining store in state */ \
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if (cmbp->res1 == ch && inptr + 4 < inend) \
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{ \
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/* See if input is part of a combined character. */ \
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uint32_t ch_next = get32 (inptr + 4); \
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while (cmbp->res2 != ch_next) \
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{ \
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++cmbp; \
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if (cmbp->res1 != ch) \
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goto not_combined; \
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} \
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\
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/* It is a combined character. First make sure we are in \
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double byte mode. */ \
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if (curcs == sb) \
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{ \
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/* We know there is room for at least one byte. */ \
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*outptr++ = SO; \
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curcs = db; \
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} \
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\
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if (__glibc_unlikely (outptr + 2 > outend)) \
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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++ = cmbp->ch[0]; \
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*outptr++ = cmbp->ch[1]; \
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inptr += 8; \
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continue; \
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\
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not_combined:; \
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} \
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}
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#else
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# define SUB_COMBINED_UCS_TO_IBM13XX
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#endif /* HAS_COMBINED */
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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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uint32_t ch = get32 (inptr); \
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\
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if (__glibc_unlikely (ch >= UCS_LIMIT)) \
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{ \
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UNICODE_TAG_HANDLER (ch, 4); \
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\
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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 += 4; \
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continue; \
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} \
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\
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SUB_COMBINED_UCS_TO_IBM13XX; \
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\
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const struct gap *rp1 = UCS4_TO_SB_IDX; \
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while (ch > rp1->end) \
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++rp1; \
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\
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/* Use the UCS4 table for single byte. */ \
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const char *cp; \
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if (__builtin_expect (ch < rp1->start, 0) \
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|| (cp = UCS4_TO_SB[ch + rp1->idx], \
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__builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0')) \
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{ \
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/* Use the UCS4 table for double byte. */ \
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const struct gap *rp2 = UCS4_TO_DB_IDX; \
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while (ch > rp2->end) \
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++rp2; \
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\
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if (__builtin_expect (ch < rp2->start, 0) \
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|| (cp = UCS4_TO_DB[ch + rp2->idx], \
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__builtin_expect (cp[0], L'\1') == L'\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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} \
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else \
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{ \
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if (curcs == sb) \
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{ \
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/* We know there is room for at least one byte. */ \
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*outptr++ = SO; \
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curcs = db; \
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} \
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\
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if (__glibc_unlikely (outptr + 2 > outend)) \
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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++ = cp[0]; \
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*outptr++ = cp[1]; \
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} \
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} \
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else \
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{ \
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if (__glibc_unlikely (curcs == db)) \
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{ \
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/* We know there is room for at least one byte. */ \
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*outptr++ = SI; \
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curcs = sb; \
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\
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if (__glibc_unlikely (outptr >= outend)) \
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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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\
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*outptr++ = cp[0]; \
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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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#define EXTRA_LOOP_DECLS , int *curcsp
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#define INIT_PARAMS int curcs = *curcsp & ~7
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#define REINIT_PARAMS curcs = *curcsp & ~7
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#define UPDATE_PARAMS *curcsp = curcs
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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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