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-rw-r--r--iconvdata/euccn.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/iconvdata/euccn.c b/iconvdata/euccn.c
new file mode 100644
index 0000000000..108974a972
--- /dev/null
+++ b/iconvdata/euccn.c
@@ -0,0 +1,304 @@
+/* Mapping tables for EUC-CN handling.
+ 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 <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <gb2312.h>
+
+/* Direction of the transformation. */
+enum direction
+{
+ illegal,
+ to_euccn,
+ from_euccn
+};
+
+struct euccn_data
+{
+ enum direction dir;
+};
+
+
+int
+gconv_init (struct gconv_step *step)
+{
+ /* Determine which direction. */
+ struct euccn_data *new_data;
+ enum direction dir;
+ int result;
+
+ if (strcasestr (step->from_name, "EUC-CN") != NULL)
+ dir = from_euccn;
+ else if (strcasestr (step->to_name, "EUC-CN") != NULL)
+ dir = to_euccn;
+ else
+ dir = illegal;
+
+ result = GCONV_NOCONV;
+ if (dir != illegal
+ && ((new_data
+ = (struct euccn_data *) malloc (sizeof (struct euccn_data)))
+ != NULL))
+ {
+ new_data->dir = dir;
+ step->data = new_data;
+ result = GCONV_OK;
+ }
+
+ return result;
+}
+
+
+void
+gconv_end (struct gconv_step *data)
+{
+ free (data->data);
+}
+
+
+int
+gconv (struct gconv_step *step, struct gconv_step_data *data,
+ const char *inbuf, size_t *inbufsize, size_t *written, int do_flush)
+{
+ struct gconv_step *next_step = step + 1;
+ struct gconv_step_data *next_data = data + 1;
+ gconv_fct fct = next_step->fct;
+ size_t do_write;
+ int result;
+
+ /* If the function is called with no input this means we have to reset
+ to the initial state. The possibly partly converted input is
+ dropped. */
+ if (do_flush)
+ {
+ do_write = 0;
+
+ /* Call the steps down the chain if there are any. */
+ if (data->is_last)
+ result = GCONV_OK;
+ else
+ {
+ struct gconv_step *next_step = step + 1;
+ struct gconv_step_data *next_data = data + 1;
+
+ result = (*fct) (next_step, next_data, NULL, 0, written, 1);
+
+ /* Clear output buffer. */
+ data->outbufavail = 0;
+ }
+ }
+ else
+ {
+ enum direction dir = ((struct euccn_data *) step->data)->dir;
+
+ do_write = 0;
+
+ do
+ {
+ result = GCONV_OK;
+
+ if (dir == from_euccn)
+ {
+ size_t inchars = *inbufsize;
+ size_t outwchars = data->outbufavail;
+ char *outbuf = data->outbuf;
+ size_t cnt = 0;
+
+ while (cnt < inchars
+ && (outwchars + sizeof (wchar_t) <= data->outbufsize))
+ {
+ int inchar = (unsigned char) inbuf[cnt];
+ wchar_t ch;
+
+ if (inchar <= 0x7f)
+ ch = (wchar_t) inchar;
+ else if ((inchar <= 0xa0 || inchar > 0xfe)
+ && inchar != 0x8e && inchar != 0x8f)
+ /* This is illegal. */
+ ch = L'\0';
+ else
+ {
+ /* Two or more byte character. First test whether the
+ next character is also available. */
+ const char *endp;
+ int inchar2;
+
+ if (cnt + 1 >= inchars)
+ {
+ /* The second character is not available. Store
+ the intermediate result. */
+ result = GCONV_INCOMPLETE_INPUT;
+ break;
+ }
+
+ inchar2 = (unsigned char) inbuf[++cnt];
+
+ /* All second bytes of a multibyte character must be
+ >= 0xa1. */
+ if (inchar2 < 0xa1)
+ {
+ /* This is an illegal character. */
+ --cnt;
+ result = GCONV_ILLEGAL_INPUT;
+ break;
+ }
+
+ /* This is code set 1: GB 2312-80. */
+ endp = &inbuf[cnt - 1];
+
+ ch = gb2312_to_ucs4 (&endp, 2, 0x80);
+ if (ch != L'\0')
+ ++cnt;
+
+ if (ch == UNKNOWN_10646_CHAR)
+ ch = L'\0';
+
+ if (ch == L'\0')
+ --cnt;
+ }
+
+ if (ch == L'\0' && inbuf[cnt] != '\0')
+ {
+ /* This is an illegal character. */
+ result = GCONV_ILLEGAL_INPUT;
+ break;
+ }
+
+ *((wchar_t *) (outbuf + outwchars)) = ch;
+ ++do_write;
+ outwchars += sizeof (wchar_t);
+ ++cnt;
+ }
+ *inbufsize -= cnt;
+ data->outbufavail = outwchars;
+ }
+ else
+ {
+ size_t inwchars = *inbufsize;
+ size_t outchars = data->outbufavail;
+ char *outbuf = data->outbuf;
+ size_t cnt = 0;
+ int extra = 0;
+
+ while (inwchars >= cnt + sizeof (wchar_t)
+ && outchars < data->outbufsize)
+ {
+ wchar_t ch = *((wchar_t *) (inbuf + cnt));
+
+ if (ch <= L'\x7f')
+ /* It's plain ASCII. */
+ outbuf[outchars] = ch;
+ else
+ {
+ /* Try the JIS character sets. */
+ size_t found;
+
+ found = ucs4_to_gb2312 (ch, &outbuf[outchars],
+ (data->outbufsize
+ - outchars));
+ if (found > 0)
+ {
+ /* It's a GB 2312 character, adjust it for
+ EUC-CN. */
+ outbuf[outchars++] += 0x80;
+ outbuf[outchars] += 0x80;
+ }
+ else if (found == 0)
+ {
+ /* We ran out of space. */
+ extra = 2;
+ break;
+ }
+ else
+ /* Illegal character. */
+ break;
+ }
+
+ ++do_write;
+ ++outchars;
+ cnt += sizeof (wchar_t);
+ }
+ *inbufsize -= cnt;
+ data->outbufavail = outchars;
+
+ if (outchars + extra < data->outbufsize)
+ {
+ /* If there is still room in the output buffer something
+ is wrong with the input. */
+ if (inwchars >= cnt + sizeof (wchar_t))
+ {
+ /* An error occurred. */
+ result = GCONV_ILLEGAL_INPUT;
+ break;
+ }
+ if (inwchars != cnt)
+ {
+ /* There are some unprocessed bytes at the end of the
+ input buffer. */
+ result = GCONV_INCOMPLETE_INPUT;
+ break;
+ }
+ }
+ }
+
+ if (result != GCONV_OK)
+ break;
+
+ if (data->is_last)
+ {
+ /* This is the last step. */
+ result = (*inbufsize > (dir == from_euccn
+ ? 0 : sizeof (wchar_t) - 1)
+ ? GCONV_FULL_OUTPUT : GCONV_EMPTY_INPUT);
+ break;
+ }
+
+ /* Status so far. */
+ result = GCONV_EMPTY_INPUT;
+
+ if (data->outbufavail > 0)
+ {
+ /* Call the functions below in the chain. */
+ size_t newavail = data->outbufavail;
+
+ result = (*fct) (next_step, next_data, data->outbuf, &newavail,
+ written, 0);
+
+ /* Correct the output buffer. */
+ if (newavail != data->outbufavail && newavail > 0)
+ {
+ memmove (data->outbuf,
+ &data->outbuf[data->outbufavail - newavail],
+ newavail);
+ data->outbufavail = newavail;
+ }
+ }
+ }
+ while (*inbufsize > 0 && result == GCONV_EMPTY_INPUT);
+ }
+
+ if (written != NULL && data->is_last)
+ *written = do_write;
+
+ return result;
+}
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