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Diffstat (limited to 'iconvdata/iso-2022-jp.c')
| -rw-r--r-- | iconvdata/iso-2022-jp.c | 693 |
1 files changed, 693 insertions, 0 deletions
diff --git a/iconvdata/iso-2022-jp.c b/iconvdata/iso-2022-jp.c new file mode 100644 index 0000000000..cb4257baf8 --- /dev/null +++ b/iconvdata/iso-2022-jp.c @@ -0,0 +1,693 @@ +/* Conversion module for ISO-2022-JP. + Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <gconv.h> +#include <stdint.h> +#include <string.h> +#include "jis0201.h" +#include "jis0212.h" +#include "jis0201.h" +#include "gb2312.h" +#include "ksc5601.h" +#include "iso8859-7jp.h" + +/* This makes obvious what everybody knows: 0x1b is the Esc character. */ +#define ESC 0x1b + +/* We provide our own initialization and destructor function. */ +#define DEFINE_INIT 0 +#define DEFINE_FINI 0 + +/* Definitions used in the body of the `gconv' function. */ +#define FROM_LOOP from_iso2022jp +#define TO_LOOP to_iso2022jp +#define MIN_NEEDED_FROM 1 +#define MAX_NEEDED_FROM 4 +#define MIN_NEEDED_TO 4 +#define FROM_DIRECTION dir == from_iso2022jp +#define PREPARE_LOOP \ + enum direction dir = ((struct iso2022jp_data *) step->data)->dir; \ + enum variant var = ((struct iso2022jp_data *) step->data)->var; \ + int set = data->statep->count; +#define END_LOOP \ + data->statep->count = set; +#define EXTRA_LOOP_ARGS , var, set + + +/* Direction of the transformation. */ +enum direction +{ + illegal_dir, + to_iso2022jp, + from_iso2022jp +}; + +/* We handle ISO-2022-jp and ISO-2022-JP-2 here. */ +enum variant +{ + illegal_var, + iso2022jp, + iso2022jp2 +}; + + +struct iso2022jp_data +{ + enum direction dir; + enum variant var; + mbstate_t save_state; +}; + + +/* The COUNT element of the state keeps track of the currently selected + character set. The possible values are: */ +enum +{ + ASCII_set = 0, + JISX0208_1978_set, + JISX0208_1983_set, + JISX0201_set, + GB2312_set, + KSC5601_set, + JISX0212_set, + ISO88591_set, + ISO88597_set +}; + + +int +gconv_init (struct gconv_step *step) +{ + /* Determine which direction. */ + struct iso2022jp_data *new_data; + enum direction dir = illegal_dir; + enum variant var; + int result; + + if (__strcasecmp (step->from_name, "ISO-2022-JP//") == 0) + { + dir = from_iso2022jp; + var = iso2022jp; + } + else if (__strcasecmp (step->to_name, "ISO-2022-JP//") == 0) + { + dir = to_iso2022jp; + var = iso2022jp; + } + else if (__strcasecmp (step->from_name, "ISO-2022-JP-2//") == 0) + { + dir = from_iso2022jp; + var = iso2022jp2; + } + else if (__strcasecmp (step->to_name, "ISO-2022-JP-2//") == 0) + { + dir = to_iso2022jp; + var = iso2022jp2; + } + + result = GCONV_NOCONV; + if (dir != illegal_dir + && ((new_data + = (struct iso2022jp_data *) malloc (sizeof (struct iso2022jp_data))) + != NULL)) + { + new_data->dir = dir; + new_data->var = var; + step->data = new_data; + + if (dir == from_iso2022jp) + { + step->min_needed_from = MIN_NEEDED_FROM; + step->max_needed_from = MAX_NEEDED_FROM; + step->min_needed_to = MIN_NEEDED_TO; + step->max_needed_to = MIN_NEEDED_TO; + } + else + { + step->min_needed_from = MIN_NEEDED_TO; + step->max_needed_from = MAX_NEEDED_TO; + step->min_needed_to = MIN_NEEDED_FROM; + step->max_needed_to = MIN_NEEDED_FROM + 2; + } + + /* Yes, this is a stateful encoding. */ + step->stateful = 1; + + result = GCONV_OK; + } + + return result; +} + + +void +gconv_end (struct gconv_step *data) +{ + free (data->data); +} + + +/* 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 != 0) \ + { \ + enum direction dir = ((struct iso2022jp_data *) step->data)->dir; \ + \ + if (dir == from_iso2022jp) \ + /* It's easy, we don't have to emit anything, we just reset the \ + state for the input. */ \ + data->statep->count = 0; \ + else \ + { \ + char *outbuf = data->outbuf; \ + \ + /* We are not in the initial state. To switch back we have \ + to emit the sequence `Esc ( B'. */ \ + if (outbuf + 3 > data->outbufend) \ + /* We don't have enough room in the output buffer. */ \ + status = GCONV_FULL_OUTPUT; \ + else \ + { \ + /* Write out the shift sequence. */ \ + *outbuf++ = ESC; \ + *outbuf++ = '('; \ + *outbuf++ = 'B'; \ + data->outbuf = outbuf; \ + data->statep->count = 0; \ + } \ + } \ + } + + +/* 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) \ + ((struct iso2022jp_data *) step->data)->save_state.count \ + = data->statep->count; \ + else \ + data->statep->count \ + = ((struct iso2022jp_data *) step->data)->save_state.count + + +/* First define the conversion function from ISO-2022-JP to UCS4. */ +#define MIN_NEEDED_INPUT MIN_NEEDED_FROM +#define MAX_NEEDED_INPUT MAX_NEEDED_FROM +#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO +#define LOOPFCT FROM_LOOP +#define BODY \ + { \ + uint32_t ch = *inptr; \ + \ + /* This is a 7bit character set, disallow all 8bit characters. */ \ + if (ch > 0x7f) \ + { \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + \ + /* Recognize escape sequences. */ \ + if (ch == ESC) \ + { \ + /* We now must be prepared to read two to three more \ + chracters. If we have a match in the first character but \ + then the input buffer ends we terminate with an error since \ + we must not risk missing an escape sequence just because it \ + is not entirely in the current input buffer. */ \ + if (inptr + 2 >= inbufend \ + || (var == iso2022jp2 && inptr[1] == '$' && inptr[2] == '(' \ + && inptr +3 >= inbufend)) \ + { \ + /* Not enough input available. */ \ + result = GCONV_EMPTY_INPUT; \ + break; \ + } \ + \ + if (inptr[1] == '(') \ + { \ + if (inptr[2] = 'B') \ + { \ + /* ASCII selected. */ \ + set = ASCII_set; \ + inptr += 3; \ + continue; \ + } \ + else if (inptr[2] == 'J') \ + { \ + /* JIS X 0201 selected. */ \ + set = JISX0201_set; \ + inptr += 3; \ + continue; \ + } \ + } \ + else if (inptr[1] == '$') \ + { \ + if (inptr[2] == '@') \ + { \ + /* JIS X 0208-1978 selected. */ \ + set = JISX0208_1978_set; \ + inptr += 3; \ + continue; \ + } \ + else if (inptr[2] == 'B') \ + { \ + /* JIS X 0208-1983 selected. */ \ + set = JISX0208_1983_set; \ + inptr += 3; \ + continue; \ + } \ + else if (var == iso2022jp2) \ + { \ + if (inptr[2] == 'A') \ + { \ + /* GB 2312-1980 selected. */ \ + set = GB2312_set; \ + inptr += 3; \ + continue; \ + } \ + else if (inptr[2] == '(') \ + { \ + if (inptr[3] == 'C') \ + { \ + /* KSC 5601-1987 selected. */ \ + set = KSC5601_set; \ + inptr += 4; \ + continue; \ + } \ + else (inptr[3] == 'D') \ + { \ + /* JIS X 0212-1990 selected. */ \ + set = JISX0212_set; \ + inptr += 4; \ + continue; \ + } \ + } \ + } \ + } \ + else if (var == iso2022jp2 && inptr[1] == '.') \ + { \ + if (inptr[2] == 'A') \ + { \ + /* ISO 8859-1-GR selected. */ \ + set = ISO88591_set; \ + inptr += 3; \ + continue; \ + } \ + else if (inptr[2] == 'F') \ + { \ + /* ISO 8859-7-GR selected. */ \ + set = ISO88597_set; \ + inptr += 3; \ + continue; \ + } \ + } \ + } \ + \ + if (set == ASCII_set \ + || (var < ISO88591_set && (ch < 0x21 || ch == 0x7f)) \ + || (var >= ISO88591_set && ch < 0x20)) \ + /* Almost done, just advance the input pointer. */ \ + ++inptr; \ + else if (set == JISX0201_set) \ + { \ + /* Use the JIS X 0201 table. */ \ + ch = jisx0201_to_ucs4 (ch + 0x80); \ + if (ch == UNKNOWN_10646_CHAR) \ + { \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + ++inptr; \ + } \ + else if (set == ISO88591_set) \ + { \ + /* This is quite easy. All characters are defined and the \ + ISO 10646 value is computed by adding 0x80. */ \ + ch += 0x80; \ + ++inptr; \ + } \ + else if (set == ISO88597_set) \ + { \ + /* We use the table from the ISO 8859-7 module. */ \ + ch = iso88597_to_ucs4[ch - 0x20]; \ + if (ch == 0) \ + { \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + ++inptr; \ + } \ + else \ + { \ + if (set == JISX0208_1978_set || set == JISX0208_1983_set) \ + /* XXX I don't have the tables for these two old variants of \ + JIS X 0208. Therefore I'm using the tables for JIS X \ + 0208-1990. If somebody has problems with this please \ + provide the appropriate tables. */ \ + ch = jisx0208_to_ucs4 (&inptr, \ + NEED_LENGTH_TEST ? inbufend - inptr : 2, 0); \ + else if (set == JISX0212_set) \ + /* Use the JIS X 0212 table. */ \ + ch = jisx0212_to_ucs4 (&inptr, \ + NEED_LENGTH_TEST ? inbufend - inptr : 2, 0); \ + else if (set == GB2312_set) \ + /* Use the GB 2312 table. */ \ + ch = gb2312_to_ucs4 (&inptr, \ + NEED_LENGTH_TEST ? inbufend - inptr : 2, 0); \ + else \ + { \ + assert (set == KSC5601_set); \ + \ + /* Use the KSC 5601 table. */ \ + ch = ksc5601_to_ucs4 (&inptr, \ + NEED_LENGTH_TEST ? inbufend - inptr : 2, \ + 0); \ + } \ + \ + if (NEED_LENGTH_TEST && ch == 0) \ + { \ + result = GCONV_EMPTY_INPUT; \ + break; \ + } \ + else if (ch == UNKNOWN_10646_CHAR) \ + { \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + } \ + \ + *((uint32_t *) outptr)++ = ch; \ + } +#define EXTRA_LOOP_DECLS , enum variant var, int set +#include <iconv/loop.c> + + +/* Next, define the other direction. */ +#define MIN_NEEDED_INPUT MIN_NEEDED_TO +#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM +#define MAX_NEEDED_OUTPUT (MAX_NEEDED_FROM + 2) +#define LOOPFCT TO_LOOP +#define BODY \ + { \ + unsigned char ch; \ + size_t written = 0; \ + \ + ch = *((uint32_t *) inptr); \ + \ + /* First see whether we can write the character using the currently \ + selected character set. */ \ + if (set == ASCII_set \ + || (ch >= 0x01 && ((set < ISO88591_set && (ch < 0x21 || ch == 0x7f)) \ + || (set >= ISO88591_set && ch < 0x20)))) \ + { \ + /* Please note that the NUL byte is *not* matched if we are not \ + currently using the ASCII charset. This is because we must \ + switch to the initial state whenever a NUL byte is written. */ \ + if (ch <= 0x7f) \ + { \ + *outptr++ = ch; \ + written = 1; \ + } \ + } \ + else if (set == JISX0201_set) \ + written = ucs4_to_jisx0201 (ch, outptr); \ + else if (set == ISO88591_set) \ + { \ + if (ch >= 0xa0 && ch <= 0xff) \ + { \ + *outptr++ = ch - 0x80; \ + written = 1; \ + } \ + } \ + else if (set == ISO88597_set) \ + { \ + const struct gap *rp = from_idx; \ + \ + while (ch > rp->end) \ + ++rp; \ + if (ch >= rp->start) \ + { \ + unsigned char res = iso88597_from_ucs4[ch + rp->idx]; \ + if (res != '\0') \ + { \ + *outptr++ = res; \ + written = 1; \ + } \ + } \ + } \ + else \ + { \ + if (set == JISX0208_1978_set || set == JISX0208_1983_set) \ + written = ucs4_to_jisx0208 (ch, outptr, \ + (NEED_LENGTH_TEST \ + ? outbufend - outptr : 2)); \ + else if (set == JISX0212_set) \ + written = ucs4_to_jisx0212 (ch, outptr, \ + (NEED_LENGTH_TEST \ + ? outbufend - outptr : 2)); \ + else if (set == GB2312_set) \ + written = ucs4_to_gb2312 (ch, outptr, (NEED_LENGTH_TEST \ + ? outbufend - outptr : 2)); \ + else \ + { \ + assert (set == KSC5601_set); \ + \ + written = ucs4_to_ksc5601 (ch, outptr, \ + (NEED_LENGTH_TEST \ + ? outbufend - outptr : 2)); \ + } \ + \ + if (NEED_LENGTH_TEST && written == 0) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + } \ + \ + if (written == UNKNOWN_10646_CHAR) \ + { \ + /* Either this is an unknown character or we have to switch \ + the currently selected character set. The character sets \ + do not code entirely separate parts of ISO 10646 and \ + therefore there is no single correct result. If we choose \ + the character set to use wrong we might be end up with \ + using yet another character set for the next character \ + though the current and the next could be encoded with one \ + character set. We leave this kind of optimization for \ + later and now simply use a fixed order in which we test for \ + availability */ \ + \ + /* First test whether we have at least three more bytes for \ + the escape sequence. The two charsets which require four \ + bytes will be handled later. */ \ + if (NEED_LENGTH_TEST && outptr + 3 > outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + if (ch <= 0x7f) \ + { \ + /* We must encode using ASCII. First write out the \ + escape sequence. */ \ + *outptr++ = ESC; \ + *outptr++ = '('; \ + *outptr++ = 'B'; \ + set = ASCII_set; \ + \ + if (NEED_LENGTH_TEST && outptr == outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + *outptr++ = ch; \ + } \ + else if (ch >= 0xa0 && ch <= 0xff) \ + { \ + /* This character set is not available in ISO-2022-JP. */ \ + if (var == iso2022jp) \ + { \ + result == GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + \ + /* We must use the ISO 8859-1 upper half. */ \ + *outptr++ = ESC; \ + *outptr++ = '.'; \ + *outptr++ = 'A'; \ + set = ISO88591_set; \ + \ + if (NEED_LENGTH_TEST && outptr == outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + *outptr++ = ch - 0x80; \ + } \ + else \ + { \ + /* Now it becomes difficult. We must search the other \ + character sets one by one and we cannot use simple \ + arithmetic to determine whether the character can be \ + encoded using this set. */ \ + size_t written; \ + unsigned char buf[2]; \ + \ + written = ucs4_to_jisx0201 (ch, buf); \ + if (written != UNKNOWN_10646_CHAR) \ + { \ + /* We use JIS X 0201. */ \ + *outptr++ = ESC; \ + *outptr++ = '$'; \ + *outptr++ = '@'; \ + set = JISX0201_set; \ + \ + if (NEED_LENGTH_TEST && outptr == outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + *outptr++ = buf[0]; \ + } \ + else \ + { \ + written = ucs4_to_jisx0208 (ch, buf, 2); \ + if (written != UNKNOWN_10646_CHAR) \ + { \ + /* We use JIS X 0208. */ \ + *outptr++ = ESC; \ + *outptr++ = '$'; \ + *outptr++ = 'B'; \ + set = JISX0208_1983_set; \ + \ + if (NEED_LENGTH_TEST && outptr + 2 > outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + *outptr++ = buf[0]; \ + *outptr++ = buf[1]; \ + } \ + else if (var == iso2022jp) \ + { \ + /* We have no other choice. */ \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + else \ + { \ + written = ucs4_to_jisx0208 (ch, buf, 2); \ + if (written != UNKNOWN_10646_CHAR) \ + { \ + /* We use JIS X 0212. */ \ + if (outptr + 4 > outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + *outptr++ = ESC; \ + *outptr++ = '$'; \ + *outptr++ = '('; \ + *outptr++ = 'D'; \ + set = JISX0212_set; \ + \ + if (NEED_LENGTH_TEST && outptr + 2 > outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + *outptr++ = buf[0]; \ + *outptr++ = buf[1]; \ + } \ + else \ + { \ + written = ucs4_to_gb2312 (ch, buf, 2); \ + if (written != UNKNOWN_10646_CHAR) \ + { \ + /* We use GB 2312. */ \ + *outptr++ = ESC; \ + *outptr++ = '$'; \ + *outptr++ = 'A'; \ + set = GB2312_set; \ + \ + if (NEED_LENGTH_TEST && outptr + 2 > outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + *outptr++ = buf[0]; \ + *outptr++ = buf[1]; \ + } \ + else \ + { \ + written = ucs4_to_ksc5601 (ch, buf, 2); \ + if (written != UNKNOWN_10646_CHAR) \ + { \ + /* We use KSC 5601. */ \ + if (outptr + 4 > outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + *outptr++ = ESC; \ + *outptr++ = '$'; \ + *outptr++ = '('; \ + *outptr++ = 'C'; \ + set = KSC5601_set; \ + \ + if (NEED_LENGTH_TEST \ + && outptr + 2 > outbufend) \ + { \ + result = GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + *outptr++ = buf[0]; \ + *outptr++ = buf[1]; \ + } \ + else \ + { \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + } \ + } \ + } \ + } \ + } \ + } \ + \ + /* Now that we wrote the output increment the input pointer. */ \ + inptr += 4; \ + } +#define EXTRA_LOOP_DECLS , enum variant var, int set +#include <iconv/loop.c> + + +/* Now define the toplevel functions. */ +#include <iconv/skeleton.c> |