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/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
/*
* This file is part of The Croco Library
*
* Copyright (C) 2002-2003 Dodji Seketeli <dodji@seketeli.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2.1 of the GNU Lesser General Public
* License as published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
/*
*$Id$
*/
/**
*@file
*The definition of the #CREncHandler class.
*/
#include "cr-enc-handler.h"
#include "cr-utils.h"
#include <string.h>
struct CREncAlias {
const gchar *name;
enum CREncoding encoding;
};
static struct CREncAlias gv_default_aliases[] = {
{"UTF-8", CR_UTF_8},
{"UTF_8", CR_UTF_8},
{"UTF8", CR_UTF_8},
{"UTF-16", CR_UTF_16},
{"UTF_16", CR_UTF_16},
{"UTF16", CR_UTF_16},
{"UCS1", CR_UCS_1},
{"UCS-1", CR_UCS_1},
{"UCS_1", CR_UCS_1},
{"ISO-8859-1", CR_UCS_1},
{"ISO_8859-1", CR_UCS_1},
{"UCS-1", CR_UCS_1},
{"UCS_1", CR_UCS_1},
{"UCS4", CR_UCS_4},
{"UCS-4", CR_UCS_4},
{"UCS_4", CR_UCS_4},
{"ASCII", CR_ASCII},
{0, 0}
};
static CREncHandler gv_default_enc_handlers[] = {
{CR_UCS_1, cr_utils_ucs1_to_utf8, cr_utils_utf8_to_ucs1,
cr_utils_ucs1_str_len_as_utf8, cr_utils_utf8_str_len_as_ucs1},
{CR_ISO_8859_1, cr_utils_ucs1_to_utf8, cr_utils_utf8_to_ucs1,
cr_utils_ucs1_str_len_as_utf8, cr_utils_utf8_str_len_as_ucs1},
{CR_ASCII, cr_utils_ucs1_to_utf8, cr_utils_utf8_to_ucs1,
cr_utils_ucs1_str_len_as_utf8, cr_utils_utf8_str_len_as_ucs1},
{0, NULL, NULL, NULL, NULL}
};
/**
* cr_enc_handler_get_instance:
*@a_enc: the encoding of the Handler.
*
*Gets the instance of encoding handler.
*This function implements a singleton pattern.
*
*Returns the instance of #CREncHandler.
*/
CREncHandler *
cr_enc_handler_get_instance (enum CREncoding a_enc)
{
gulong i = 0;
for (i = 0; gv_default_enc_handlers[i].encoding; i++) {
if (gv_default_enc_handlers[i].encoding == a_enc) {
return (CREncHandler *) & gv_default_enc_handlers[i];
}
}
return NULL;
}
/**
* cr_enc_handler_resolve_enc_alias:
*@a_alias_name: the encoding name.
*@a_enc: output param. The returned encoding type
*or 0 if the alias is not supported.
*
*Given an encoding name (called an alias name)
*the function returns the matching encoding type.
*
*Returns CR_OK upon successful completion, an error code otherwise.
*/
enum CRStatus
cr_enc_handler_resolve_enc_alias (const guchar * a_alias_name,
enum CREncoding *a_enc)
{
gulong i = 0;
guchar *alias_name_up = NULL;
enum CRStatus status = CR_ENCODING_NOT_FOUND_ERROR;
g_return_val_if_fail (a_alias_name != NULL, CR_BAD_PARAM_ERROR);
alias_name_up = (guchar *) g_ascii_strup ((const gchar *) a_alias_name, -1);
for (i = 0; gv_default_aliases[i].name; i++) {
if (!strcmp (gv_default_aliases[i].name, (const gchar *) alias_name_up)) {
*a_enc = gv_default_aliases[i].encoding;
status = CR_OK;
break;
}
}
return status;
}
/**
* cr_enc_handler_convert_input:
*@a_this: the current instance of #CREncHandler.
*@a_in: the input buffer to convert.
*@a_in_len: in/out parameter. The len of the input
*buffer to convert. After return, contains the number of
*bytes actually consumed.
*@a_out: output parameter. The converted output buffer.
*Must be freed by the buffer.
*@a_out_len: output parameter. The length of the output buffer.
*
*Converts a raw input buffer into an utf8 buffer.
*
*Returns CR_OK upon successful completion, an error code otherwise.
*/
enum CRStatus
cr_enc_handler_convert_input (CREncHandler * a_this,
const guchar * a_in,
gulong * a_in_len,
guchar ** a_out, gulong * a_out_len)
{
enum CRStatus status = CR_OK;
g_return_val_if_fail (a_this && a_in && a_in_len && a_out,
CR_BAD_PARAM_ERROR);
if (a_this->decode_input == NULL)
return CR_OK;
if (a_this->enc_str_len_as_utf8) {
status = a_this->enc_str_len_as_utf8 (a_in,
&a_in[*a_in_len - 1],
a_out_len);
g_return_val_if_fail (status == CR_OK, status);
} else {
*a_out_len = *a_in_len;
}
*a_out = g_malloc0 (*a_out_len);
status = a_this->decode_input (a_in, a_in_len, *a_out, a_out_len);
if (status != CR_OK) {
g_free (*a_out);
*a_out = NULL;
}
g_return_val_if_fail (status == CR_OK, status);
return CR_OK;
}
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