/* -*- c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Copyright ( C ) 2010 Tetsuro IKEDA
Copyright ( C ) 2010 - 2013 Kentoku SHIBA
Copyright ( C ) 2011 - 2017 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.hpp>
#include <mrn_mysql.h>
#include <mrn_mysql_compat.h>
#include <mrn_err.h>
#include <mrn_encoding.hpp>
#include <mrn_windows.hpp>
#include <mrn_table.hpp>
#include <mrn_macro.hpp>
#include <mrn_database_manager.hpp>
#include <mrn_context_pool.hpp>
#include <mrn_variables.hpp>
#include <mrn_current_thread.hpp>
MRN_BEGIN_DECLS
extern mrn::DatabaseManager *mrn_db_manager;
extern mrn::ContextPool *mrn_context_pool;
struct st_mrn_snip_info
{
grn_ctx *ctx;
grn_obj *db;
bool use_shared_db;
grn_obj *snippet;
String result_str;
};
static my_bool mrn_snippet_prepare(st_mrn_snip_info *snip_info, UDF_ARGS *args,
char *message, grn_obj **snippet)
{
unsigned int i;
CHARSET_INFO *cs;
grn_ctx *ctx = snip_info->ctx;
long long snip_max_len;
long long snip_max_num;
long long skip_leading_spaces;
long long html_escape;
int flags = GRN_SNIP_COPY_TAG;
grn_snip_mapping *mapping = NULL;
grn_rc rc;
String *result_str = &snip_info->result_str;
myf utf8_flag= current_thd->get_utf8_flag();
*snippet = NULL;
snip_max_len = *((long long *) args->args[1 ]);
snip_max_num = *((long long *) args->args[2 ]);
if (args->arg_type[3 ] == STRING_RESULT) {
if (!(cs = get_charset_by_name(args->args[3 ],
MYF(utf8_flag)))) {
snprintf(message, MYSQL_ERRMSG_SIZE,
"Unknown charset: <%s>" , args->args[3 ]);
goto error;
}
} else {
uint charset_id = static_cast <uint>(*((long long *) args->args[3 ]));
if (!(cs = get_charset(charset_id, MYF(0 )))) {
snprintf(message, MYSQL_ERRMSG_SIZE,
"Unknown charset ID: <%u>" , charset_id);
goto error;
}
}
if (!mrn::encoding::set_raw(ctx, cs)) {
snprintf(message, MYSQL_ERRMSG_SIZE,
"Unsupported charset: <%s>" , cs->coll_name.str);
goto error;
}
if (!(cs->state & (MY_CS_BINSORT | MY_CS_CSSORT))) {
flags |= GRN_SNIP_NORMALIZE;
}
skip_leading_spaces = *((long long *) args->args[4 ]);
if (skip_leading_spaces) {
flags |= GRN_SNIP_SKIP_LEADING_SPACES;
}
html_escape = *((long long *) args->args[5 ]);
if (html_escape) {
mapping = (grn_snip_mapping *) -1 ;
}
*snippet = grn_snip_open(ctx, flags, static_cast <unsigned int >(snip_max_len),
static_cast <unsigned int >(snip_max_num),
"" , 0 , "" , 0 , mapping);
if (ctx->rc) {
snprintf(message, MYSQL_ERRMSG_SIZE,
"Failed to open grn_snip: <%s>" , ctx->errbuf);
goto error;
}
for (i = 8 ; i < args->arg_count; i += 3 ) {
rc = grn_snip_add_cond(ctx, *snippet,
args->args[i], args->lengths[i],
args->args[i + 1 ], args->lengths[i + 1 ],
args->args[i + 2 ], args->lengths[i + 2 ]);
if (rc) {
snprintf(message, MYSQL_ERRMSG_SIZE,
"Failed to add a condition to grn_snip: <%s>" , ctx->errbuf);
goto error;
}
}
result_str->set_charset(cs);
return FALSE ;
error:
if (*snippet) {
grn_obj_close(ctx, *snippet);
}
return TRUE ;
}
MRN_API my_bool mroonga_snippet_init(UDF_INIT *init, UDF_ARGS *args, char *message)
{
uint i;
st_mrn_snip_info *snip_info = NULL;
bool can_open_snippet = TRUE ;
init->ptr = NULL;
if (!mrn_initialized)
{
snprintf(message,
MYSQL_ERRMSG_SIZE,
"mroonga_snippet(): Mroonga isn't initialized" );
goto error;
}
if (args->arg_count < 11 || (args->arg_count - 11 ) % 3 )
{
snprintf(message, MYSQL_ERRMSG_SIZE,
"Incorrect number of arguments for mroonga_snippet(): %u" ,
args->arg_count);
goto error;
}
if (args->arg_type[0 ] != STRING_RESULT) {
strcpy(message, "mroonga_snippet() requires string for 1st argument" );
goto error;
}
if (args->arg_type[1 ] != INT_RESULT) {
strcpy(message, "mroonga_snippet() requires int for 2nd argument" );
goto error;
}
if (args->arg_type[2 ] != INT_RESULT) {
strcpy(message, "mroonga_snippet() requires int for 3rd argument" );
goto error;
}
if (
args->arg_type[3 ] != STRING_RESULT &&
args->arg_type[3 ] != INT_RESULT
) {
strcpy(message,
"mroonga_snippet() requires string or int for 4th argument" );
goto error;
}
if (args->arg_type[4 ] != INT_RESULT) {
strcpy(message, "mroonga_snippet() requires int for 5th argument" );
goto error;
}
if (args->arg_type[5 ] != INT_RESULT) {
strcpy(message, "mroonga_snippet() requires int for 6th argument" );
goto error;
}
for (i = 6 ; i < args->arg_count; i++) {
if (args->arg_type[i] != STRING_RESULT) {
snprintf(message, MYSQL_ERRMSG_SIZE,
"mroonga_snippet() requires string for %uth argument" ,
i);
goto error;
}
}
init->maybe_null = 1 ;
if (!(snip_info = (st_mrn_snip_info *) mrn_my_malloc(sizeof (st_mrn_snip_info),
MYF(MY_WME | MY_ZEROFILL))))
{
strcpy(message, "mroonga_snippet() out of memory" );
goto error;
}
snip_info->ctx = mrn_context_pool->pull();
{
const char *current_db_path = MRN_THD_DB_PATH(current_thd);
const char *action;
if (current_db_path) {
action = "open database" ;
mrn::Database *db;
int error = mrn_db_manager->open(current_db_path, &db);
if (error == 0 ) {
snip_info->db = db->get();
grn_ctx_use(snip_info->ctx, snip_info->db);
snip_info->use_shared_db = true ;
}
} else {
action = "create anonymous database" ;
snip_info->db = grn_db_create(snip_info->ctx, NULL, NULL);
snip_info->use_shared_db = false ;
}
if (!snip_info->db) {
snprintf(message, MYSQL_ERRMSG_SIZE,
"mroonga_snippet(): failed to %s: %s" ,
action,
snip_info->ctx->errbuf);
goto error;
}
}
for (i = 1 ; i < args->arg_count; i++) {
if (!args->args[i]) {
can_open_snippet = FALSE ;
break ;
}
}
if (can_open_snippet) {
if (mrn_snippet_prepare(snip_info, args, message, &snip_info->snippet)) {
goto error;
}
}
init->ptr = (char *) snip_info;
return FALSE ;
error:
if (snip_info) {
if (!snip_info->use_shared_db) {
grn_obj_close(snip_info->ctx, snip_info->db);
}
mrn_context_pool->release(snip_info->ctx);
my_free(snip_info);
}
return TRUE ;
}
MRN_API char *mroonga_snippet(UDF_INIT *init, UDF_ARGS *args, char *result,
unsigned long *length, uchar *is_null, uchar *error)
{
st_mrn_snip_info *snip_info = (st_mrn_snip_info *) init->ptr;
grn_ctx *ctx = snip_info->ctx;
String *result_str = &snip_info->result_str;
char *target;
unsigned int target_length;
grn_obj *snippet = NULL;
grn_rc rc;
unsigned int i, n_results, max_tagged_length, result_length;
if (!args->args[0 ]) {
*is_null = 1 ;
return NULL;
}
*is_null = 0 ;
target = args->args[0 ];
target_length = args->lengths[0 ];
if (!snip_info->snippet) {
for (i = 1 ; i < args->arg_count; i++) {
if (!args->args[i]) {
my_printf_error(ER_MRN_INVALID_NULL_VALUE_NUM,
ER_MRN_INVALID_NULL_VALUE_STR, MYF(0 ),
"mroonga_snippet() arguments" );
goto error;
}
}
if (mrn_snippet_prepare(snip_info, args, NULL, &snippet)) {
goto error;
}
} else {
snippet = snip_info->snippet;
}
rc = grn_snip_exec(ctx, snippet, target, target_length,
&n_results, &max_tagged_length);
if (rc) {
my_printf_error(ER_MRN_ERROR_FROM_GROONGA_NUM,
ER_MRN_ERROR_FROM_GROONGA_STR, MYF(0 ), ctx->errbuf);
goto error;
}
result_str->length(0 );
if (result_str->reserve((args->lengths[6 ] + args->lengths[7 ] +
max_tagged_length) * n_results)) {
my_error(ER_OUT_OF_RESOURCES, MYF(0 ), HA_ERR_OUT_OF_MEM);
goto error;
}
for (i = 0 ; i < n_results; i++) {
result_str->q_append(args->args[6 ], args->lengths[6 ]);
rc = grn_snip_get_result(ctx, snippet, i,
(char *) result_str->ptr() + result_str->length(),
&result_length);
if (rc) {
my_printf_error(ER_MRN_ERROR_FROM_GROONGA_NUM,
ER_MRN_ERROR_FROM_GROONGA_STR, MYF(0 ), ctx->errbuf);
goto error;
}
result_str->length(result_str->length() + result_length);
result_str->q_append(args->args[7 ], args->lengths[7 ]);
}
if (!snip_info->snippet) {
rc = grn_obj_close(ctx, snippet);
if (rc) {
my_printf_error(ER_MRN_ERROR_FROM_GROONGA_NUM,
ER_MRN_ERROR_FROM_GROONGA_STR, MYF(0 ), ctx->errbuf);
goto error;
}
}
*length = result_str->length();
return (char *) result_str->ptr();
error:
*error = 1 ;
return NULL;
}
MRN_API void mroonga_snippet_deinit(UDF_INIT *init)
{
st_mrn_snip_info *snip_info = (st_mrn_snip_info *) init->ptr;
if (snip_info) {
if (snip_info->snippet) {
grn_obj_close(snip_info->ctx, snip_info->snippet);
}
MRN_STRING_FREE(snip_info->result_str);
if (!snip_info->use_shared_db) {
grn_obj_close(snip_info->ctx, snip_info->db);
}
mrn_context_pool->release(snip_info->ctx);
my_free(snip_info);
}
}
MRN_END_DECLS
Messung V0.5 in Prozent C=100 H=61 G=82
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(vorverarbeitet am 2026-10-08)
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