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/*
* Copyright (C) 2002,2003 Red Hat, Inc.
*
* This 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* This file used to contain a full iso2022 decoder which was removed for
* version 0.40. Now it only performs input conversion from the given
* character encoding. TODO: probably this layer could be removed completely.
*/
#include <config.h>
#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <glib.h>
#include "debug.h"
#include "buffer.h"
#include "iso2022.h"
#include "vteconv.h"
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#include <glib/gi18n-lib.h>
#include <gdk/gdkkeysyms.h>
/* An invalid codepoint. */
#define INVALID_CODEPOINT 0xFFFD
struct _vte_iso2022_state {
const gchar *codeset, *native_codeset, *utf8_codeset, *target_codeset;
VteConv conv;
VteByteArray *buffer;
};
struct _vte_iso2022_state *
_vte_iso2022_state_new(const char *native_codeset)
{
struct _vte_iso2022_state *state;
state = g_slice_new0(struct _vte_iso2022_state);
state->native_codeset = state->codeset = g_intern_string(native_codeset);
if (native_codeset == NULL) {
const char *codeset;
g_get_charset(&codeset);
state->native_codeset = state->codeset = g_intern_string(codeset);
}
state->utf8_codeset = g_intern_string("UTF-8");
state->target_codeset = VTE_CONV_GUNICHAR_TYPE;
_vte_debug_print(VTE_DEBUG_SUBSTITUTION,
"Native codeset \"%s\", currently %s\n",
state->native_codeset, state->codeset);
state->conv = _vte_conv_open(state->target_codeset, state->codeset);
state->buffer = _vte_byte_array_new();
if (state->conv == VTE_INVALID_CONV) {
g_warning(_("Unable to convert characters from %s to %s."),
state->codeset, state->target_codeset);
_vte_debug_print(VTE_DEBUG_SUBSTITUTION,
"Using UTF-8 instead.\n");
state->codeset = state->utf8_codeset;
state->conv = _vte_conv_open(state->target_codeset,
state->codeset);
if (state->conv == VTE_INVALID_CONV) {
g_error(_("Unable to convert characters from %s to %s."),
state->codeset, state->target_codeset);
}
}
return state;
}
void
_vte_iso2022_state_free(struct _vte_iso2022_state *state)
{
_vte_byte_array_free(state->buffer);
if (state->conv != VTE_INVALID_CONV) {
_vte_conv_close(state->conv);
}
g_slice_free(struct _vte_iso2022_state, state);
}
void
_vte_iso2022_state_set_codeset(struct _vte_iso2022_state *state,
const char *codeset)
{
VteConv conv;
g_return_if_fail(state != NULL);
g_return_if_fail(codeset != NULL);
g_return_if_fail(strlen(codeset) > 0);
_vte_debug_print(VTE_DEBUG_SUBSTITUTION, "%s\n", codeset);
conv = _vte_conv_open(state->target_codeset, codeset);
if (conv == VTE_INVALID_CONV) {
g_warning(_("Unable to convert characters from %s to %s."),
codeset, state->target_codeset);
return;
}
if (state->conv != VTE_INVALID_CONV) {
_vte_conv_close(state->conv);
}
state->codeset = g_intern_string (codeset);
state->conv = conv;
}
const char *
_vte_iso2022_state_get_codeset(struct _vte_iso2022_state *state)
{
return state->codeset;
}
gsize
_vte_iso2022_process(struct _vte_iso2022_state *state,
const guchar *cdata, gsize length,
GArray *gunichars)
{
glong processed = 0;
gsize converted;
const guchar *inbuf;
gunichar *outbuf, *buf;
gsize inbytes, outbytes;
guint i, j;
gunichar c;
gboolean stop;
inbuf = cdata;
inbytes = length;
_vte_byte_array_set_minimum_size(state->buffer,
sizeof(gunichar) * length * 2);
buf = (gunichar *)state->buffer->data;
outbuf = buf;
outbytes = sizeof(gunichar) * length * 2;
do {
converted = _vte_conv_cu(state->conv,
&inbuf, &inbytes,
&outbuf, &outbytes);
stop = FALSE;
switch (converted) {
case ((gsize)-1):
switch (errno) {
case EILSEQ:
/* Munge the input. */
inbuf++;
inbytes--;
*outbuf++ = INVALID_CODEPOINT;
outbytes -= sizeof(gunichar);
break;
case EINVAL:
/* Incomplete. Save for later. */
stop = TRUE;
break;
case E2BIG:
/* Should never happen. */
g_assert_not_reached();
break;
default:
/* Should never happen. */
g_assert_not_reached();
break;
}
default:
break;
}
} while ((inbytes > 0) && !stop);
/* skip blanks -- TODOegmont: why here? */
j = gunichars->len;
g_array_set_size(gunichars, gunichars->len + outbuf-buf);
for (i = 0; buf + i < outbuf; i++) {
c = buf[i];
if (G_UNLIKELY (c == '\0')) {
/* Skip the padding character. */
continue;
}
g_array_index(gunichars, gunichar, j++) = c;
}
gunichars->len = j;
/* Done. */
processed = length - inbytes;
_vte_debug_print(VTE_DEBUG_SUBSTITUTION,
"Consuming %ld bytes.\n", (long) processed);
return processed;
}
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