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Diffstat (limited to 'src/st/croco/cr-enc-handler.c')
| -rw-r--r-- | src/st/croco/cr-enc-handler.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/st/croco/cr-enc-handler.c b/src/st/croco/cr-enc-handler.c new file mode 100644 index 0000000..65adc7a --- /dev/null +++ b/src/st/croco/cr-enc-handler.c @@ -0,0 +1,184 @@ +/* -*- 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; +} |