166 lines
5.3 KiB
C++
166 lines
5.3 KiB
C++
/* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/*
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This file provide mysql_string service to plugins.
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operations on mysql_string can be performed by plugins via these service
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functions.
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*/
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#include <my_sys.h>
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#include "string_service.h"
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#include "mysql/service_mysql_string.h"
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/* key_memory_string_iterator */
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#include "mysqld.h"
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PSI_memory_key key_memory_string_iterator;
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/*
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This service function converts the mysql_string to the character set
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specified by charset_name parameter.
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*/
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extern "C"
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int mysql_string_convert_to_char_ptr(mysql_string_handle string_handle,
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const char *charset_name,
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char *buffer,
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unsigned int buffer_size,
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int *error)
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{
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String *str= (String *) string_handle;
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int len= (int)my_convert(buffer, buffer_size - 1, &my_charset_utf8_general_ci,
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str->ptr(), str->length(), str->charset(),
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(uint*) error);
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buffer[len]= '\0';
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return (len);
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}
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/*
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This service function deallocates the mysql_string_handle allocated on
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server and used in plugins.
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*/
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extern "C"
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void mysql_string_free(mysql_string_handle string_handle)
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{
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String *str= (String *) string_handle;
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str->mem_free();
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delete [] str;
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}
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/*
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This service function deallocates the mysql_string_iterator_handle
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allocated on server and used in plugins.
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*/
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extern "C"
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void mysql_string_iterator_free(mysql_string_iterator_handle iterator_handle)
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{
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my_free((string_iterator *) iterator_handle);
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}
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/* This service function allocate mysql_string_iterator_handle and return it */
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extern "C"
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mysql_string_iterator_handle mysql_string_get_iterator(mysql_string_handle
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string_handle)
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{
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String *str= (String *) string_handle;
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string_iterator *iterator= (string_iterator *) my_malloc(key_memory_string_iterator,
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sizeof
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(struct st_string_iterator), MYF(0));
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iterator->iterator_str= str;
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iterator->iterator_ptr= str->ptr();
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iterator->ctype= 0;
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return (iterator);
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}
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/* Provide service which returns the next mysql_string_iterator_handle */
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extern "C"
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int mysql_string_iterator_next(mysql_string_iterator_handle iterator_handle)
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{
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int char_len, char_type, tmp_len;
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string_iterator *iterator= (string_iterator *) iterator_handle;
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String *str= iterator->iterator_str;
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const CHARSET_INFO *cs= str->charset();
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char *end= (char*) str->ptr() + str->length();
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if (iterator->iterator_ptr >= (const char*) end)
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return (0);
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char_len= (cs->cset->ctype(cs, &char_type, (uchar*) iterator->iterator_ptr,
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(uchar*) end));
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iterator->ctype= char_type;
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tmp_len= (char_len > 0 ? char_len : (char_len < 0 ? -char_len : 1));
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if(iterator->iterator_ptr+tmp_len > end)
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return (0);
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else
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iterator->iterator_ptr+= tmp_len;
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return (1);
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}
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/*
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Provide service which calculate weather the current iterator_ptr points to
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upper case character or not
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*/
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extern "C"
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int mysql_string_iterator_isupper(mysql_string_iterator_handle iterator_handle)
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{
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string_iterator *iterator= (string_iterator *) iterator_handle;
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return (iterator->ctype & _MY_U);
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}
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/*
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Provide service which calculate weather the current iterator_ptr points to
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lower case character or not
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*/
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extern "C"
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int mysql_string_iterator_islower(mysql_string_iterator_handle iterator_handle)
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{
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string_iterator *iterator= (string_iterator *) iterator_handle;
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return (iterator->ctype & _MY_L);
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}
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/*
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Provide service which calculate weather the current iterator_ptr points to
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digit or not
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*/
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extern "C"
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int mysql_string_iterator_isdigit(mysql_string_iterator_handle iterator_handle)
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{
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string_iterator *iterator= (string_iterator *) iterator_handle;
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return (iterator->ctype & _MY_NMR);
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}
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/*
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This function provide plugin service to convert a String pointed by handle to
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lower case. Conversion depends on the client character set info
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*/
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extern "C"
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mysql_string_handle mysql_string_to_lowercase(mysql_string_handle string_handle)
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{
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String *str= (String *) string_handle;
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String *res= new String[1];
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const CHARSET_INFO *cs= str->charset();
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if (cs->casedn_multiply == 1)
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{
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res->copy(*str);
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my_casedn_str(cs, res->c_ptr_quick());
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}
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else
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{
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size_t len= str->length() * cs->casedn_multiply;
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res->set_charset(cs);
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res->alloc(len);
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len= cs->cset->casedn(cs, (char*) str->ptr(), str->length(), (char *) res->ptr(), len);
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res->length(len);
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}
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return (res);
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}
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