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Diffstat (limited to 'REORG.TODO/iconvdata/ibm939.c')
| -rw-r--r-- | REORG.TODO/iconvdata/ibm939.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/REORG.TODO/iconvdata/ibm939.c b/REORG.TODO/iconvdata/ibm939.c new file mode 100644 index 0000000000..19c562a30c --- /dev/null +++ b/REORG.TODO/iconvdata/ibm939.c @@ -0,0 +1,281 @@ +/* Conversion to and from IBM939. + Copyright (C) 2000-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Masahide Washizawa <washi@yamato.ibm.co.jp>, 2000. + + 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 + <http://www.gnu.org/licenses/>. */ + +/* IBM939 is designed for the representation of Japanese Latin/Kanji + using a stateful EBCDIC encoding scheme. It is also known as + CCSID 939 or CP939. See: + https://www-01.ibm.com/software/globalization/ccsid/ccsid939.html */ + +#include <dlfcn.h> +#include <stdint.h> +#include <wchar.h> +#include <byteswap.h> +#include "ibm939.h" + +/* 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 CHARSET_NAME "IBM939//" +#define FROM_LOOP from_ibm939 +#define TO_LOOP to_ibm939 +#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 4 +#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 3 +#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 retore the state. */ +#define SAVE_RESET_STATE(Save) \ + if (Save) \ + save_curcs = *curcsp; \ + else \ + *curcsp = save_curcs + + +/* Current codeset type. */ +enum +{ + sb = 0, + db = 64 +}; + +/* First, define the conversion function from IBM-939 to UCS4. */ +#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 = *inptr; \ + uint32_t res; \ + \ + if (__builtin_expect (ch, 0) == SO) \ + { \ + /* Shift OUT, change to DBCS converter (redundant escape okay). */ \ + curcs = db; \ + ++inptr; \ + continue; \ + } \ + else if (__builtin_expect (ch, 0) == SI) \ + { \ + /* Shift IN, change to SBCS converter (redundant escape okay). */ \ + curcs = sb; \ + ++inptr; \ + continue; \ + } \ + \ + if (curcs == sb) \ + { \ + /* Use the IBM939 table for single byte. */ \ + res = __ibm939sb_to_ucs4[ch]; \ + if (__builtin_expect (res == L'\0', 0) && ch != '\0') \ + { \ + /* This is an illegal character. */ \ + STANDARD_FROM_LOOP_ERR_HANDLER (1); \ + } \ + else \ + { \ + put32 (outptr, res); \ + outptr += 4; \ + } \ + ++inptr; \ + } \ + else \ + { \ + /* Use the IBM939 table for double byte. */ \ + const struct gap *rp2 = __ibm939db_to_ucs4_idx; \ + \ + 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]; \ + while (ch > rp2->end) \ + ++rp2; \ + \ + if (__builtin_expect (rp2->start == 0xffff, 0) \ + || __builtin_expect (ch < rp2->start, 0) \ + || (res = __ibm939db_to_ucs4[ch + rp2->idx], \ + __builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \ + { \ + /* This is an illegal character. */ \ + STANDARD_FROM_LOOP_ERR_HANDLER (2); \ + } \ + else \ + { \ + put32 (outptr, res); \ + outptr += 4; \ + } \ + 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> + +/* Next, define the other direction */ +#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); \ + const struct gap *rp1 = __ucs4_to_ibm939sb_idx; \ + const struct gap *rp2 = __ucs4_to_ibm939db_idx; \ + \ + if (__glibc_unlikely (ch >= 0xffff)) \ + { \ + UNICODE_TAG_HANDLER (ch, 4); \ + goto ibm939_invalid_char; \ + } \ + \ + while (ch > rp1->end) \ + ++rp1; \ + \ + /* Use the UCS4 table for single byte. */ \ + unsigned char sbconv; \ + if (__builtin_expect (ch < rp1->start, 0) \ + || (sbconv = __ucs4_to_ibm939sb[ch + rp1->idx], \ + __builtin_expect (sbconv, L'\1') == L'\0' && ch != '\0')) \ + { \ + /* Use the UCS4 table for double byte. */ \ + while (ch > rp2->end) \ + ++rp2; \ + \ + const char *cp; \ + if (__builtin_expect (ch < rp2->start, 0) \ + || (cp = __ucs4_to_ibm939db[ch + rp2->idx], \ + __builtin_expect (cp[0], L'\1')==L'\0' && ch != '\0')) \ + { \ + /* This is an illegal character. */ \ + ibm939_invalid_char: \ + STANDARD_TO_LOOP_ERR_HANDLER (4); \ + } \ + else \ + { \ + if (curcs == sb) \ + { \ + if (__glibc_unlikely (outptr + 1 > outend)) \ + { \ + result = __GCONV_FULL_OUTPUT; \ + break; \ + } \ + *outptr++ = SO; \ + curcs = db; \ + } \ + \ + if (__glibc_unlikely (outptr + 2 > outend)) \ + { \ + result = __GCONV_FULL_OUTPUT; \ + break; \ + } \ + *outptr++ = cp[0]; \ + *outptr++ = cp[1]; \ + } \ + } \ + else \ + { \ + if (curcs == db) \ + { \ + if (__glibc_unlikely (outptr + 1 > outend)) \ + { \ + result = __GCONV_FULL_OUTPUT; \ + break; \ + } \ + *outptr++ = SI; \ + curcs = sb; \ + } \ + \ + if (__glibc_unlikely (outptr + 1 > outend)) \ + { \ + result = __GCONV_FULL_OUTPUT; \ + break; \ + } \ + if (ch == 0x7e) \ + *outptr++ = 0xa0; \ + else if (ch == 0x5c) \ + *outptr++ = 0xb2; \ + else \ + *outptr++ = sbconv; \ + } \ + \ + /* 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> |