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glibc/iconvdata/ibm1364.c

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/* Conversion from and to IBM1364.
Copyright (C) 2005-2024 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 <wchar.h>
#include <byteswap.h>
#ifndef CHARSET_NAME
/* This is really the IBM1364 converter, not another module sharing
the code. */
# define DATA_HEADER "ibm1364.h"
# define CHARSET_NAME "IBM1364//"
# define FROM_LOOP from_ibm1364
# define TO_LOOP to_ibm1364
# define SB_TO_UCS4 __ibm1364sb_to_ucs4
# define DB_TO_UCS4_IDX __ibm1364db_to_ucs4_idx
# define DB_TO_UCS4 __ibm1364db_to_ucs4
# define UCS4_TO_SB_IDX __ucs4_to_ibm1364sb_idx
# define UCS4_TO_SB __ucs4_to_ibm1364sb
# define UCS4_TO_DB_IDX __ucs4_to_ibm1364db_idx
# define UCS4_TO_DB __ucs4_to_ibm1364db
# define UCS_LIMIT 0xffff
#endif
#include DATA_HEADER
/* 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 MIN_NEEDED_FROM 1
#define MAX_NEEDED_FROM 2
#define MIN_NEEDED_TO 4
#ifdef HAS_COMBINED
# define MAX_NEEDED_TO 8
#else
# define MAX_NEEDED_TO 4
#endif
#define ONE_DIRECTION 0
#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 restore the state. */
#define SAVE_RESET_STATE(Save) \
if (Save) \
save_curcs = *curcsp; \
else \
*curcsp = save_curcs
/* Current codeset type. */
enum
{
sb = 0,
db = 64
};
/* Subroutine to write out converted UCS4 from IBM-13XX. */
#ifdef HAS_COMBINED
# define SUB_COMBINED_UCS_FROM_IBM13XX \
{ \
if (res != UCS_LIMIT || ch < __TO_UCS4_COMBINED_MIN \
|| ch > __TO_UCS4_COMBINED_MAX) \
{ \
put32 (outptr, res); \
outptr += 4; \
} \
else \
{ \
/* This is a combined character. Make sure we have room. */ \
if (__glibc_unlikely (outptr + 8 > outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
\
const struct divide *cmbp \
= &DB_TO_UCS4_COMB[ch - __TO_UCS4_COMBINED_MIN]; \
assert (cmbp->res1 != 0 && cmbp->res2 != 0); \
\
put32 (outptr, cmbp->res1); \
outptr += 4; \
put32 (outptr, cmbp->res2); \
outptr += 4; \
} \
}
#else
# define SUB_COMBINED_UCS_FROM_IBM13XX \
{ \
put32 (outptr, res); \
outptr += 4; \
}
#endif /* HAS_COMBINED */
/* First, define the conversion function from IBM-13XX to UCS4. */
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT MAX_NEEDED_TO
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
uint32_t ch = *inptr; \
\
if (__builtin_expect (ch, 0) == SO) \
{ \
/* Shift OUT, change to DBCS converter (redundant escape okay). */ \
curcs = db; \
++inptr; \
continue; \
} \
if (__builtin_expect (ch, 0) == SI) \
{ \
/* Shift IN, change to SBCS converter (redundant escape okay). */ \
curcs = sb; \
++inptr; \
continue; \
} \
\
if (curcs == sb) \
{ \
/* Use the IBM13XX table for single byte. */ \
uint32_t res = SB_TO_UCS4[ch]; \
if (__builtin_expect (res, L'\1') == L'\0' && ch != '\0') \
{ \
/* This is an illegal character. */ \
if (! ignore_errors_p ()) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
++*irreversible; \
} \
else \
{ \
put32 (outptr, res); \
outptr += 4; \
} \
++inptr; \
} \
else \
{ \
assert (curcs == db); \
\
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]; \
\
/* Use the IBM1364 table for double byte. */ \
const struct gap *rp2 = DB_TO_UCS4_IDX; \
while (ch > rp2->end) \
++rp2; \
\
uint32_t res; \
if (__builtin_expect (rp2->start == 0xffff, 0) \
|| __builtin_expect (ch < rp2->start, 0) \
|| (res = DB_TO_UCS4[ch + rp2->idx], \
__builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \
{ \
/* This is an illegal character. */ \
if (! ignore_errors_p ()) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
++*irreversible; \
} \
else \
{ \
SUB_COMBINED_UCS_FROM_IBM13XX; \
} \
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>
/* Subroutine to convert two UCS4 codes to IBM-13XX. */
#ifdef HAS_COMBINED
# define SUB_COMBINED_UCS_TO_IBM13XX \
{ \
const struct combine *cmbp = UCS4_COMB_TO_DB; \
while (cmbp->res1 < ch) \
++cmbp; \
/* XXX if last char is beginning of combining store in state */ \
if (cmbp->res1 == ch && inptr + 4 < inend) \
{ \
/* See if input is part of a combined character. */ \
uint32_t ch_next = get32 (inptr + 4); \
while (cmbp->res2 != ch_next) \
{ \
++cmbp; \
if (cmbp->res1 != ch) \
goto not_combined; \
} \
\
/* It is a combined character. First make sure we are in \
double byte mode. */ \
if (curcs == sb) \
{ \
/* We know there is room for at least one byte. */ \
*outptr++ = SO; \
curcs = db; \
} \
\
if (__glibc_unlikely (outptr + 2 > outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
*outptr++ = cmbp->ch[0]; \
*outptr++ = cmbp->ch[1]; \
inptr += 8; \
continue; \
\
not_combined:; \
} \
}
#else
# define SUB_COMBINED_UCS_TO_IBM13XX
#endif /* HAS_COMBINED */
/* Next, define the other direction. */
#define MIN_NEEDED_INPUT MIN_NEEDED_TO
#define MAX_NEEDED_INPUT MAX_NEEDED_TO
#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
#define LOOPFCT TO_LOOP
#define BODY \
{ \
uint32_t ch = get32 (inptr); \
\
if (__glibc_unlikely (ch >= UCS_LIMIT)) \
{ \
UNICODE_TAG_HANDLER (ch, 4); \
\
if (! ignore_errors_p ()) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
++*irreversible; \
inptr += 4; \
continue; \
} \
\
SUB_COMBINED_UCS_TO_IBM13XX; \
\
const struct gap *rp1 = UCS4_TO_SB_IDX; \
while (ch > rp1->end) \
++rp1; \
\
/* Use the UCS4 table for single byte. */ \
const char *cp; \
if (__builtin_expect (ch < rp1->start, 0) \
|| (cp = UCS4_TO_SB[ch + rp1->idx], \
__builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0')) \
{ \
/* Use the UCS4 table for double byte. */ \
const struct gap *rp2 = UCS4_TO_DB_IDX; \
while (ch > rp2->end) \
++rp2; \
\
if (__builtin_expect (ch < rp2->start, 0) \
|| (cp = UCS4_TO_DB[ch + rp2->idx], \
__builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0')) \
{ \
/* This is an illegal character. */ \
if (! ignore_errors_p ()) \
{ \
result = __GCONV_ILLEGAL_INPUT; \
break; \
} \
++*irreversible; \
} \
else \
{ \
if (curcs == sb) \
{ \
/* We know there is room for at least one byte. */ \
*outptr++ = SO; \
curcs = db; \
} \
\
if (__glibc_unlikely (outptr + 2 > outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
*outptr++ = cp[0]; \
*outptr++ = cp[1]; \
} \
} \
else \
{ \
if (__glibc_unlikely (curcs == db)) \
{ \
/* We know there is room for at least one byte. */ \
*outptr++ = SI; \
curcs = sb; \
\
if (__glibc_unlikely (outptr >= outend)) \
{ \
result = __GCONV_FULL_OUTPUT; \
break; \
} \
} \
\
*outptr++ = cp[0]; \
} \
\
/* 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>
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