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/* -*- c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Copyright(C) 2013-2017 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_mysql.h>
#include <mrn_mysql_compat.h>
#include <mrn_path_mapper.hpp>
#include <mrn_windows.hpp>
#include <mrn_macro.hpp>
#include <mrn_variables.hpp>
#include <mrn_context_pool.hpp>
MRN_BEGIN_DECLS
extern mrn::ContextPool *mrn_context_pool;
struct EscapeInfo
{
grn_ctx *ctx;
bool script_mode;
grn_obj target_characters;
grn_obj escaped_value;
};
MRN_API my_bool mroonga_escape_init(UDF_INIT *init, UDF_ARGS *args,
char *message)
{
EscapeInfo *info = NULL;
bool script_mode = false;
init->ptr = NULL;
if (!(1 <= args->arg_count && args->arg_count <= 2)) {
snprintf(message,
MYSQL_ERRMSG_SIZE,
"mroonga_escape(): Incorrect number of arguments: %u for 1..2",
args->arg_count);
goto error;
}
if (args->attribute_lengths[0] == strlen("script") &&
strncmp(args->attributes[0], "script", strlen("script")) == 0) {
switch (args->arg_type[0]) {
case ROW_RESULT:
snprintf(message,
MYSQL_ERRMSG_SIZE,
"mroonga_escape(): "
"The 1st script argument must be "
"string, integer or floating point: <row>");
goto error;
break;
default:
break;
}
script_mode = true;
} else {
if (args->arg_type[0] != STRING_RESULT) {
strcpy(message,
"mroonga_escape(): The 1st query argument must be string");
goto error;
}
}
if (args->arg_count == 2) {
if (args->arg_type[1] != STRING_RESULT) {
strcpy(message,
"mroonga_escape(): "
"The 2st argument must be escape target characters as string");
goto error;
}
}
init->maybe_null = 1;
info = static_cast<EscapeInfo *>(mrn_my_malloc(sizeof(EscapeInfo),
MYF(MY_WME | MY_ZEROFILL)));
if (!info) {
strcpy(message, "mroonga_escape(): out of memory");
goto error;
}
info->ctx = mrn_context_pool->pull();
info->script_mode = script_mode;
GRN_TEXT_INIT(&(info->target_characters), 0);
GRN_TEXT_INIT(&(info->escaped_value), 0);
init->ptr = reinterpret_cast<char *>(info);
return FALSE;
error:
if (info) {
mrn_context_pool->release(info->ctx);
my_free(info);
}
return TRUE;
}
static void escape(EscapeInfo *info, UDF_ARGS *args)
{
grn_ctx *ctx = info->ctx;
GRN_BULK_REWIND(&(info->escaped_value));
if (info->script_mode) {
switch (args->arg_type[0]) {
case STRING_RESULT:
{
char *value = args->args[0];
unsigned long value_length = args->lengths[0];
GRN_TEXT_PUTC(ctx, &(info->escaped_value), '"');
if (args->arg_count == 2) {
grn_obj special_characters;
GRN_TEXT_INIT(&special_characters, 0);
GRN_TEXT_PUT(ctx,
&special_characters,
args->args[1],
args->lengths[1]);
GRN_TEXT_PUTC(ctx, &special_characters, '\0');
grn_expr_syntax_escape(ctx,
value,
value_length,
GRN_TEXT_VALUE(&special_characters),
'\\',
&(info->escaped_value));
GRN_OBJ_FIN(ctx, &special_characters);
} else {
const char *special_characters = "\"\\";
grn_expr_syntax_escape(ctx,
value,
value_length,
special_characters,
'\\',
&(info->escaped_value));
}
GRN_TEXT_PUTC(ctx, &(info->escaped_value), '"');
}
break;
case REAL_RESULT:
{
double value = *reinterpret_cast<double *>(args->args[0]);
grn_text_ftoa(ctx, &(info->escaped_value), value);
}
break;
case INT_RESULT:
{
longlong value = *reinterpret_cast<longlong *>(args->args[0]);
grn_text_lltoa(ctx, &(info->escaped_value), value);
}
break;
case DECIMAL_RESULT:
{
grn_obj value_raw;
GRN_TEXT_INIT(&value_raw, GRN_OBJ_DO_SHALLOW_COPY);
GRN_TEXT_SET(ctx, &value_raw, args->args[0], args->lengths[0]);
grn_obj value;
GRN_FLOAT_INIT(&value, 0);
if (grn_obj_cast(ctx, &value_raw, &value, GRN_FALSE) == GRN_SUCCESS) {
grn_text_ftoa(ctx, &(info->escaped_value), GRN_FLOAT_VALUE(&value));
} else {
GRN_TEXT_PUT(ctx,
&(info->escaped_value),
args->args[0],
args->lengths[0]);
}
GRN_OBJ_FIN(ctx, &value);
GRN_OBJ_FIN(ctx, &value_raw);
}
break;
default:
break;
}
} else {
char *query = args->args[0];
unsigned long query_length = args->lengths[0];
if (args->arg_count == 2) {
char *target_characters = args->args[1];
unsigned long target_characters_length = args->lengths[1];
GRN_TEXT_PUT(ctx, &(info->target_characters),
target_characters,
target_characters_length);
GRN_TEXT_PUTC(ctx, &(info->target_characters), '\0');
grn_expr_syntax_escape(ctx, query, query_length,
GRN_TEXT_VALUE(&(info->target_characters)),
GRN_QUERY_ESCAPE,
&(info->escaped_value));
} else {
grn_expr_syntax_escape_query(ctx, query, query_length,
&(info->escaped_value));
}
}
}
MRN_API char *mroonga_escape(UDF_INIT *init, UDF_ARGS *args, char *result,
unsigned long *length, char *is_null, char *error)
{
EscapeInfo *info = reinterpret_cast<EscapeInfo *>(init->ptr);
grn_ctx *ctx = info->ctx;
if (!args->args[0]) {
*is_null = 1;
return NULL;
}
*is_null = 0;
escape(info, args);
if (ctx->rc) {
my_message(ER_ERROR_ON_WRITE, ctx->errbuf, MYF(0));
goto error;
}
*length = GRN_TEXT_LEN(&(info->escaped_value));
return GRN_TEXT_VALUE(&(info->escaped_value));
error:
*error = 1;
return NULL;
}
MRN_API void mroonga_escape_deinit(UDF_INIT *init)
{
EscapeInfo *info = reinterpret_cast<EscapeInfo *>(init->ptr);
if (info) {
grn_obj_unlink(info->ctx, &(info->target_characters));
grn_obj_unlink(info->ctx, &(info->escaped_value));
mrn_context_pool->release(info->ctx);
my_free(info);
}
}
MRN_END_DECLS
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