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-rw-r--r--iconv/gconv_simple.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/iconv/gconv_simple.c b/iconv/gconv_simple.c
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--- /dev/null
+++ b/iconv/gconv_simple.c
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+/* Simple transformations functions.
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ 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 <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <sys/param.h>
+
+
+int
+__gconv_transform_dummy (struct gconv_step *step, struct gconv_step_data *data,
+ const char *inbuf, size_t *inlen, size_t *written,
+ int do_flush)
+{
+ size_t do_write;
+
+ /* We have no stateful encoding. So we don't have to do anything
+ special. */
+ if (do_flush)
+ do_write = 0;
+ else
+ {
+ do_write = MIN (*inlen, data->outbufsize - data->outbufavail);
+
+ memcpy (data->outbuf, inbuf, do_write);
+
+ *inlen -= do_write;
+ data->outbufavail += do_write;
+ }
+
+ /* ### TODO Actually, this number must be devided according to the
+ size of the input charset. I.e., if the input is in UCS4 the
+ number of copied bytes must be divided by 4. */
+ if (written != NULL)
+ *written = do_write;
+
+ return GCONV_OK;
+}
+
+
+int
+__gconv_transform_init_rstate (struct gconv_step *step,
+ struct gconv_step_data *data)
+{
+ /* We have to provide the transformation function an correctly initialized
+ object of type `mbstate_t'. This must be dynamically allocated. */
+ data->data = calloc (1, sizeof (mbstate_t));
+
+ return data->data == NULL ? GCONV_NOMEM : GCONV_OK;
+}
+
+
+void
+__gconv_transform_end_rstate (struct gconv_step_data *data)
+{
+ if (data->data != NULL)
+ free (data->data);
+}
+
+
+int
+__gconv_transform_ucs4_utf8 (struct gconv_step *step,
+ struct gconv_step_data *data, const char *inbuf,
+ size_t *inlen, 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)
+ {
+ /* Clear the state. */
+ memset (data->data, '\0', sizeof (mbstate_t));
+ 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
+ {
+ do_write = 0;
+
+ do
+ {
+ const char *newinbuf = inbuf;
+ size_t actually = __wcsnrtombs (&data->outbuf[data->outbufavail],
+ (const wchar_t **) &newinbuf,
+ *inlen / sizeof (wchar_t),
+ data->outbufsize - data->outbufavail,
+ (mbstate_t *) data->data);
+
+ /* Status so far. */
+ result = GCONV_EMPTY_INPUT;
+
+ /* Remember how much we converted. */
+ do_write += newinbuf - inbuf;
+ *inlen -= (newinbuf - inbuf) * sizeof (wchar_t);
+
+ data->outbufavail += actually;
+ 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)
+ {
+ memmove (data->outbuf,
+ &data->outbuf[data->outbufavail - newavail],
+ newavail);
+ data->outbufavail = newavail;
+ }
+ }
+ }
+ while (*inlen > 0 && result == GCONV_EMPTY_INPUT);
+ }
+
+ if (written != NULL && data->is_last)
+ *written = do_write / sizeof (wchar_t);
+
+ return result;
+}
+
+
+int
+__gconv_transform_utf8_ucs4 (struct gconv_step *step,
+ struct gconv_step_data *data, const char *inbuf,
+ size_t *inlen, 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)
+ {
+ /* Clear the state. */
+ memset (data->data, '\0', sizeof (mbstate_t));
+ 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);
+ }
+ }
+ else
+ {
+ do_write = 0;
+
+ do
+ {
+ const char *newinbuf = inbuf;
+ size_t actually = __mbsnrtowcs ((wchar_t *) &data->outbuf[data->outbufavail],
+ &newinbuf, *inlen,
+ ((data->outbufsize
+ - data->outbufavail)
+ / sizeof (wchar_t)),
+ (mbstate_t *) data->data);
+
+ /* Status so far. */
+ result = GCONV_EMPTY_INPUT;
+
+ /* Remember how much we converted. */
+ do_write += actually;
+ *inlen -= newinbuf - inbuf;
+
+ data->outbufavail += actually * sizeof (wchar_t);
+ 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)
+ {
+ memmove (data->outbuf,
+ &data->outbuf[data->outbufavail - newavail],
+ newavail);
+ data->outbufavail = newavail;
+ }
+ }
+ }
+ while (*inlen > 0 && result == GCONV_EMPTY_INPUT);
+ }
+
+ if (written != NULL && data->is_last)
+ *written = do_write;
+
+ return GCONV_OK;
+}
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