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/* -*- c-basic-offset: 2 -*- */
/*
Copyright(C) 2013 Kouhei Sutou <kou@clear-code.com>
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 02110-1335 USA
*/
#include "mrn_field_normalizer.hpp"
#include "mrn_encoding.hpp"
// for debug
#define MRN_CLASS_NAME "mrn::FieldNormalizer"
namespace mrn {
FieldNormalizer::FieldNormalizer(grn_ctx *ctx, THD *thread, Field *field)
: ctx_(ctx),
thread_(thread),
field_(field) {
}
FieldNormalizer::~FieldNormalizer() {
}
bool FieldNormalizer::should_normalize() {
MRN_DBUG_ENTER_METHOD();
DBUG_PRINT("info",
("mroonga: result_type = %u", field_->result_type()));
DBUG_PRINT("info",
("mroonga: charset->name = %s", field_->charset()->name));
DBUG_PRINT("info",
("mroonga: charset->csname = %s", field_->charset()->csname));
DBUG_PRINT("info",
("mroonga: charset->state = %u", field_->charset()->state));
bool need_normalize_p;
if (field_->charset()->state & (MY_CS_BINSORT | MY_CS_CSSORT)) {
need_normalize_p = false;
DBUG_PRINT("info",
("mroonga: should_normalize: false: sort is required"));
} else {
if (is_text_type()) {
need_normalize_p = true;
DBUG_PRINT("info", ("mroonga: should_normalize: true: text type"));
} else {
need_normalize_p = false;
DBUG_PRINT("info", ("mroonga: should_normalize: false: no text type"));
}
}
DBUG_RETURN(need_normalize_p);
}
bool FieldNormalizer::is_text_type() {
MRN_DBUG_ENTER_METHOD();
bool text_type_p;
switch (field_->type()) {
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_BLOB:
case MYSQL_TYPE_VAR_STRING:
text_type_p = true;
break;
case MYSQL_TYPE_STRING:
switch (field_->real_type()) {
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_SET:
text_type_p = false;
break;
default:
text_type_p = true;
break;
}
break;
default:
text_type_p = false;
break;
}
DBUG_RETURN(text_type_p);
}
grn_obj *FieldNormalizer::normalize(const char *string,
unsigned int string_length) {
MRN_DBUG_ENTER_METHOD();
grn_obj *normalizer = find_grn_normalizer();
int flags = 0;
grn_encoding original_encoding = GRN_CTX_GET_ENCODING(ctx_);
encoding::set_raw(ctx_, field_->charset());
grn_obj *grn_string = grn_string_open(ctx_, string, string_length,
normalizer, flags);
GRN_CTX_SET_ENCODING(ctx_, original_encoding);
DBUG_RETURN(grn_string);
}
grn_obj *FieldNormalizer::find_grn_normalizer() {
MRN_DBUG_ENTER_METHOD();
const CHARSET_INFO *charset_info = field_->charset();
const char *normalizer_name = NULL;
const char *default_normalizer_name = "NormalizerAuto";
if ((strcmp(charset_info->name, "utf8_general_ci") == 0) ||
(strcmp(charset_info->name, "utf8mb4_general_ci") == 0)) {
normalizer_name = "NormalizerMySQLGeneralCI";
} else if ((strcmp(charset_info->name, "utf8_unicode_ci") == 0) ||
(strcmp(charset_info->name, "utf8mb4_unicode_ci") == 0)) {
normalizer_name = "NormalizerMySQLUnicodeCI";
} else if ((strcmp(charset_info->name, "utf8_unicode_520_ci") == 0) ||
(strcmp(charset_info->name, "utf8mb4_unicode_520_ci") == 0)) {
normalizer_name = "NormalizerMySQLUnicode520CI";
}
grn_obj *normalizer = NULL;
if (normalizer_name) {
normalizer = grn_ctx_get(ctx_, normalizer_name, -1);
if (!normalizer) {
char error_message[MRN_MESSAGE_BUFFER_SIZE];
snprintf(error_message, MRN_MESSAGE_BUFFER_SIZE,
"%s normalizer isn't found for %s. "
"Install groonga-normalizer-mysql normalizer. "
"%s is used as fallback.",
normalizer_name,
charset_info->name,
default_normalizer_name);
push_warning(thread_, MRN_SEVERITY_WARNING,
HA_ERR_UNSUPPORTED, error_message);
}
}
if (!normalizer) {
normalizer = grn_ctx_get(ctx_, default_normalizer_name, -1);
}
DBUG_RETURN(normalizer);
}
}
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