133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
/*
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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*
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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, version 2.0,
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* as published by the Free Software Foundation.
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*
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* This program is also distributed with certain software (including
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* but not limited to OpenSSL) that is licensed under separate terms,
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* as designated in a particular file or component or in included license
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* documentation. The authors of MySQL hereby grant you an additional
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* permission to link the program and your derivative works with the
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* separately licensed software that they have included with MySQL.
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*
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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, version 2.0, for more details.
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*
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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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#include <mutex>
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#include "my_dbug.h"
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#include "my_sys.h" // escape_string_for_mysql
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#include "query_string_builder.h"
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namespace polarx_rpc {
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CHARSET_INFO *Query_string_builder::m_charset = NULL;
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std::once_flag Query_string_builder::m_charset_initialized;
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void Query_string_builder::init_charset() {
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m_charset = get_charset_by_csname("utf8mb4", MY_CS_PRIMARY, MYF(MY_WME));
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}
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Query_string_builder::Query_string_builder(size_t reserve)
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: m_in_quoted(false), m_in_identifier(false) {
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std::call_once(m_charset_initialized, init_charset);
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DBUG_ASSERT(m_charset != NULL);
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m_str.reserve(reserve);
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}
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Query_string_builder &Query_string_builder::quote_identifier(const char *s,
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size_t length) {
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m_str.append("`");
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escape_identifier(s, length);
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m_str.append("`");
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return *this;
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}
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Query_string_builder &
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Query_string_builder::quote_identifier_if_needed(const char *s, size_t length) {
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bool need_quote = false;
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if (length > 0 && isalpha(s[0])) {
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for (size_t i = 1; i < length; i++)
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if (!isalnum(s[i]) && s[i] != '_') {
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need_quote = true;
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break;
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}
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} else
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need_quote = true;
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if (need_quote)
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return quote_identifier(s, length);
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else
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return put(s, length);
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}
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Query_string_builder &Query_string_builder::escape_identifier(const char *s,
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size_t length) {
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size_t str_pos = m_str.size();
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// resize the buffer to fit the original size + worst case length of s
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m_str.resize(str_pos + length * 2);
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char *cursor_out = &m_str[str_pos];
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const char *cursor_in = s;
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for (size_t idx = 0; idx < length; ++idx) {
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if (*cursor_in == '`')
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*cursor_out++ = '`';
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*cursor_out++ = *cursor_in++;
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}
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m_str.resize(str_pos + (cursor_out - &m_str[str_pos]));
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return *this;
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}
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Query_string_builder &Query_string_builder::escape_string(const char *s,
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size_t length) {
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size_t str_pos = m_str.size();
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// resize the buffer to fit the original size + worst case length of s
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m_str.resize(str_pos + 2 * length + 1);
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size_t r = escape_string_for_mysql(m_charset, &m_str[str_pos], 2 * length + 1,
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s, length);
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m_str.resize(str_pos + r);
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return *this;
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}
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Query_string_builder &Query_string_builder::quote_string(const char *s,
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size_t length) {
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m_str.append("'");
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escape_string(s, length);
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m_str.append("'");
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return *this;
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}
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Query_string_builder &Query_string_builder::put(const char *s, size_t length) {
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if (m_in_quoted)
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escape_string(s, length);
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else if (m_in_identifier)
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escape_identifier(s, length);
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else
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m_str.append(s, length);
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return *this;
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}
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Query_formatter &Query_string_builder::format() {
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if (!m_formatter)
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m_formatter.reset(new Query_formatter(m_str, *m_charset));
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return *m_formatter;
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}
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} // namespace polarx_rpc
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