610 lines
14 KiB
C++
610 lines
14 KiB
C++
/*
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Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights
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reserved.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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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
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02110-1301 USA
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*/
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#include "value.h"
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#include "binlog_event.h"
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#include <boost/lexical_cast.hpp>
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#include <iomanip>
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#include <boost/format.hpp>
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#include <mysql.h>
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#define DIG_PER_DEC1 9
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using namespace mysql;
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using namespace mysql::system;
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namespace mysql {
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static const int dig2bytes[DIG_PER_DEC1 + 1] = {0, 1, 1, 2, 2, 3, 3, 4, 4, 4};
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int decimal_bin_size(int precision, int scale)
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{
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int intg = precision - scale;
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int intg0 = intg / DIG_PER_DEC1;
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int frac0 = scale / DIG_PER_DEC1;
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int intg0x = intg - intg0 * DIG_PER_DEC1;
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int frac0x = scale - frac0 * DIG_PER_DEC1;
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return(
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intg0 * sizeof(boost::int32_t) + dig2bytes[intg0x] +
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frac0 * sizeof(boost::int32_t) + dig2bytes[frac0x]
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);
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}
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int calc_field_size(unsigned char column_type, const unsigned char *field_ptr, boost::uint32_t metadata)
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{
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boost::uint32_t length;
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switch (column_type) {
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case MYSQL_TYPE_VAR_STRING:
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/* This type is hijacked for result set types. */
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length= metadata;
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break;
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case MYSQL_TYPE_NEWDECIMAL:
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{
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int precision = (metadata & 0xff);
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int scale = metadata >> 8;
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length = decimal_bin_size(precision, scale);
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break;
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}
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case MYSQL_TYPE_DECIMAL:
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case MYSQL_TYPE_FLOAT:
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case MYSQL_TYPE_DOUBLE:
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length= metadata;
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break;
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/*
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The cases for SET and ENUM are include for completeness, however
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both are mapped to type MYSQL_TYPE_STRING and their real types
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are encoded in the field metadata.
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*/
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case MYSQL_TYPE_SET:
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case MYSQL_TYPE_ENUM:
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case MYSQL_TYPE_STRING:
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{
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//unsigned char type= metadata >> 8U;
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unsigned char type = metadata & 0xff;
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if ((type == MYSQL_TYPE_SET) || (type == MYSQL_TYPE_ENUM))
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{
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//length= metadata & 0x00ff;
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length = (metadata & 0xff00) >> 8;
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}
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else
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{
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/*
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We are reading the actual size from the master_data record
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because this field has the actual lengh stored in the first
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byte.
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*/
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length= (unsigned int) *field_ptr+1;
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//DBUG_ASSERT(length != 0);
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}
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break;
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}
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case MYSQL_TYPE_YEAR:
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case MYSQL_TYPE_TINY:
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length= 1;
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break;
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case MYSQL_TYPE_SHORT:
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length= 2;
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break;
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case MYSQL_TYPE_INT24:
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length= 3;
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break;
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case MYSQL_TYPE_LONG:
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length= 4;
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break;
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case MYSQL_TYPE_LONGLONG:
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length= 8;
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break;
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case MYSQL_TYPE_NULL:
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length= 0;
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break;
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case MYSQL_TYPE_NEWDATE:
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length= 3;
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break;
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case MYSQL_TYPE_DATE:
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case MYSQL_TYPE_TIME:
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length= 3;
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break;
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case MYSQL_TYPE_TIMESTAMP:
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length= 4;
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break;
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case MYSQL_TYPE_DATETIME:
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length= 8;
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break;
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case MYSQL_TYPE_BIT:
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{
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/*
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Decode the size of the bit field from the master.
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from_len is the length in bytes from the master
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from_bit_len is the number of extra bits stored in the master record
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If from_bit_len is not 0, add 1 to the length to account for accurate
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number of bytes needed.
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*/
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boost::uint32_t from_len= (metadata >> 8U) & 0x00ff;
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boost::uint32_t from_bit_len= metadata & 0x00ff;
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//DBUG_ASSERT(from_bit_len <= 7);
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length= from_len + ((from_bit_len > 0) ? 1 : 0);
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break;
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}
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case MYSQL_TYPE_VARCHAR:
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{
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length= metadata > 255 ? 2 : 1;
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length+= length == 1 ? (boost::uint32_t) *field_ptr : *((boost::uint16_t *)field_ptr);
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break;
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}
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case MYSQL_TYPE_TINY_BLOB:
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case MYSQL_TYPE_MEDIUM_BLOB:
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case MYSQL_TYPE_LONG_BLOB:
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case MYSQL_TYPE_BLOB:
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case MYSQL_TYPE_GEOMETRY:
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{
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switch (metadata)
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{
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case 1:
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length= 1+ (boost::uint32_t) field_ptr[0];
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break;
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case 2:
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length= 2+ (boost::uint32_t) (*(boost::uint16_t *)(field_ptr) & 0xFFFF);
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break;
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case 3:
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// TODO make platform indep.
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length= 3+ (boost::uint32_t) (long) (*((boost::uint32_t *) (field_ptr)) & 0xFFFFFF);
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break;
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case 4:
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// TODO make platform indep.
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length= 4+ (boost::uint32_t) (long) *((boost::uint32_t *) (field_ptr));
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break;
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default:
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length= 0;
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break;
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}
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break;
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}
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default:
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length= ~(boost::uint32_t) 0;
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}
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return length;
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}
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/*
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Value::Value(Value &val)
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{
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m_size= val.length();
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m_storage= val.storage();
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m_type= val.type();
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m_metadata= val.metadata();
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m_is_null= val.is_null();
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}
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*/
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Value::Value(const Value& val)
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{
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m_size= val.m_size;
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m_storage= val.m_storage;
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m_type= val.m_type;
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m_metadata= val.m_metadata;
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m_is_null= val.m_is_null;
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}
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Value &Value::operator=(const Value &val)
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{
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m_size= val.m_size;
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m_storage= val.m_storage;
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m_type= val.m_type;
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m_metadata= val.m_metadata;
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m_is_null= val.m_is_null;
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return *this;
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}
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bool Value::operator==(const Value &val) const
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{
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return (m_size == val.m_size) &&
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(m_storage == val.m_storage) &&
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(m_type == val.m_type) &&
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(m_metadata == val.m_metadata);
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}
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bool Value::operator!=(const Value &val) const
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{
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return !operator==(val);
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}
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char *Value::as_c_str(unsigned long &size) const
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{
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if (m_is_null || m_size == 0)
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{
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size= 0;
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return 0;
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}
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/*
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Length encoded; First byte is length of string.
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*/
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int metadata_length= m_size > 251 ? 2: 1;
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/*
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Size is length of the character string; not of the entire storage
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*/
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size= m_size - metadata_length;
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char *str = const_cast<char *>(m_storage + metadata_length);
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if (m_type == MYSQL_TYPE_VARCHAR && m_metadata > 255) {
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str++;
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size--;
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}
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return str;
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}
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unsigned char *Value::as_blob(unsigned long &size) const
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{
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if (m_is_null || m_size == 0)
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{
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size= 0;
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return 0;
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}
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/*
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Size was calculated during construction of the object and only inludes the
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size of the blob data, not the metadata part which also is stored in the
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storage. For blobs this part can be between 1-4 bytes long.
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*/
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size= m_size - m_metadata;
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/*
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Adjust the storage pointer with the size of the metadata.
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*/
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return (unsigned char *)(m_storage + m_metadata);
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}
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boost::int32_t Value::as_int32() const
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{
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if (m_is_null)
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{
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return 0;
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}
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boost::uint32_t to_int;
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Protocol_chunk<boost::uint32_t> prot_integer(to_int);
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buffer_source buff(m_storage, m_size);
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buff >> prot_integer;
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return to_int;
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}
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boost::int8_t Value::as_int8() const
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{
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if (m_is_null)
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{
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return 0;
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}
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boost::int8_t to_int;
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Protocol_chunk<boost::int8_t> prot_integer(to_int);
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buffer_source buff(m_storage, m_size);
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buff >> prot_integer;
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return to_int;
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}
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boost::int16_t Value::as_int16() const
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{
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if (m_is_null)
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{
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return 0;
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}
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boost::int16_t to_int;
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Protocol_chunk<boost::int16_t> prot_integer(to_int);
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buffer_source buff(m_storage, m_size);
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buff >> prot_integer;
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return to_int;
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}
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boost::int64_t Value::as_int64() const
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{
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if (m_is_null)
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{
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return 0;
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}
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boost::int64_t to_int;
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Protocol_chunk<boost::int64_t> prot_integer(to_int);
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buffer_source buff(m_storage, m_size);
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buff >> prot_integer;
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return to_int;
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}
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float Value::as_float() const
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{
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// TODO
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return *((const float *)storage());
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}
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double Value::as_double() const
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{
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// TODO
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return *((const double *)storage());
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}
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void Converter::to(std::string &str, const Value &val) const
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{
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if (val.is_null())
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{
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str= "(NULL)";
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return;
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}
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switch(val.type())
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{
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case MYSQL_TYPE_DECIMAL:
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str= "not implemented";
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break;
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case MYSQL_TYPE_TINY:
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str= boost::lexical_cast<std::string>(static_cast<int>(val.as_int8()));
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break;
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case MYSQL_TYPE_SHORT:
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str= boost::lexical_cast<std::string>(val.as_int16());
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break;
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case MYSQL_TYPE_LONG:
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str= boost::lexical_cast<std::string>(val.as_int32());
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break;
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case MYSQL_TYPE_FLOAT:
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{
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str= boost::str(boost::format("%d") % val.as_float());
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}
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break;
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case MYSQL_TYPE_DOUBLE:
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str= boost::str(boost::format("%d") % val.as_double());
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break;
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case MYSQL_TYPE_NULL:
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str= "not implemented";
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break;
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case MYSQL_TYPE_TIMESTAMP:
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str= boost::lexical_cast<std::string>((boost::uint32_t)val.as_int32());
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break;
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case MYSQL_TYPE_LONGLONG:
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str= boost::lexical_cast<std::string>(val.as_int64());
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break;
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case MYSQL_TYPE_INT24:
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str= "not implemented";
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break;
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case MYSQL_TYPE_DATE:
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{
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const char* val_storage = val.storage();
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unsigned int date_val = (val_storage[0] & 0xff) + ((val_storage[1] & 0xff) << 8) + ((val_storage[2] & 0xff) << 16);
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unsigned int date_year = date_val >> 9;
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date_val -= (date_year << 9);
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unsigned int date_month = date_val >> 5;
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unsigned int date_day = date_val - (date_month << 5);
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str = boost::str(boost::format("%04d-%02d-%02d") % date_year % date_month % date_day);
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break;
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}
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case MYSQL_TYPE_DATETIME:
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{
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boost::uint64_t timestamp= val.as_int64();
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unsigned long d= timestamp / 1000000;
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unsigned long t= timestamp % 1000000;
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std::ostringstream os;
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os << std::setfill('0') << std::setw(4) << d / 10000
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<< std::setw(1) << '-'
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<< std::setw(2) << (d % 10000) / 100
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<< std::setw(1) << '-'
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<< std::setw(2) << d % 100
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<< std::setw(1) << ' '
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<< std::setw(2) << t / 10000
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<< std::setw(1) << ':'
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<< std::setw(2) << (t % 10000) / 100
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<< std::setw(1) << ':'
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<< std::setw(2) << t % 100;
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str= os.str();
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}
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break;
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case MYSQL_TYPE_TIME:
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{
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const char* val_storage = val.storage();
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unsigned int time_val = (val_storage[0] & 0xff) + ((val_storage[1] & 0xff) << 8) + ((val_storage[2] & 0xff) << 16);
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unsigned int time_sec = time_val % 100;
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time_val -= time_sec;
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unsigned int time_min = (time_val % 10000) / 100;
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unsigned int time_hour = (time_val - time_min) / 10000;
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str = boost::str(boost::format("%02d:%02d:%02d") % time_hour % time_min % time_sec);
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break;
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}
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case MYSQL_TYPE_YEAR:
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{
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const char* val_storage = val.storage();
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unsigned int year_val = (val_storage[0] & 0xff);
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year_val = year_val > 0 ? (year_val + 1900) : 0;
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str = boost::str(boost::format("%04d") % year_val);
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break;
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}
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case MYSQL_TYPE_NEWDATE:
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str= "not implemented";
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break;
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case MYSQL_TYPE_VARCHAR:
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{
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unsigned long size;
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char *ptr= val.as_c_str(size);
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str.append(ptr, size);
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}
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break;
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case MYSQL_TYPE_VAR_STRING:
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{
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str.append(val.storage(), val.length());
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}
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break;
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case MYSQL_TYPE_STRING:
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{
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unsigned char str_type = 0;
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if (val.metadata()) {
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str_type = val.metadata() & 0xff;
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}
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if (str_type == MYSQL_TYPE_SET) {
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str = "not implemented";
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break;
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} else if (str_type == MYSQL_TYPE_ENUM) {
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unsigned int val_storage = static_cast<unsigned int>(*val.storage());
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str = boost::str(boost::format("%u") % val_storage);
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break;
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}
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unsigned long size;
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char *ptr= val.as_c_str(size);
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str.append(ptr, size);
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}
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break;
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case MYSQL_TYPE_BIT:
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str= "not implemented";
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break;
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case MYSQL_TYPE_NEWDECIMAL:
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str= "not implemented";
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break;
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case MYSQL_TYPE_ENUM:
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str= "not implemented";
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break;
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case MYSQL_TYPE_SET:
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str= "not implemented";
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break;
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case MYSQL_TYPE_TINY_BLOB:
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case MYSQL_TYPE_MEDIUM_BLOB:
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case MYSQL_TYPE_LONG_BLOB:
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case MYSQL_TYPE_BLOB:
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{
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unsigned long size;
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unsigned char *ptr= val.as_blob(size);
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str.append((const char *)ptr, size);
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}
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break;
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case MYSQL_TYPE_GEOMETRY:
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str= "not implemented";
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break;
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default:
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str= "not implemented";
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break;
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}
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}
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void Converter::to(float &out, const Value &val) const
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{
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switch(val.type())
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{
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case MYSQL_TYPE_FLOAT:
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out= val.as_float();
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break;
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default:
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out= 0;
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}
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}
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void Converter::to(long &out, const Value &val) const
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{
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switch(val.type())
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{
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case MYSQL_TYPE_DECIMAL:
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// TODO
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out= 0;
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break;
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case MYSQL_TYPE_TINY:
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out= val.as_int8();
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break;
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case MYSQL_TYPE_SHORT:
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out= val.as_int16();
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break;;
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case MYSQL_TYPE_LONG:
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out= (long)val.as_int32();
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break;
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case MYSQL_TYPE_FLOAT:
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out= 0;
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break;
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case MYSQL_TYPE_DOUBLE:
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out= (long)val.as_double();
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case MYSQL_TYPE_NULL:
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out= 0;
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break;
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case MYSQL_TYPE_TIMESTAMP:
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out=(boost::uint32_t)val.as_int32();
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break;
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|
|
case MYSQL_TYPE_LONGLONG:
|
|
out= (long)val.as_int64();
|
|
break;
|
|
case MYSQL_TYPE_INT24:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_DATE:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_TIME:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_DATETIME:
|
|
out= (long)val.as_int64();
|
|
break;
|
|
case MYSQL_TYPE_YEAR:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_NEWDATE:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_VARCHAR:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_BIT:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_NEWDECIMAL:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_ENUM:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_SET:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_TINY_BLOB:
|
|
case MYSQL_TYPE_MEDIUM_BLOB:
|
|
case MYSQL_TYPE_LONG_BLOB:
|
|
case MYSQL_TYPE_BLOB:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_VAR_STRING:
|
|
{
|
|
std::string str;
|
|
str.append(val.storage(), val.length());
|
|
out= boost::lexical_cast<long>(str.c_str());
|
|
}
|
|
break;
|
|
case MYSQL_TYPE_STRING:
|
|
out= 0;
|
|
break;
|
|
case MYSQL_TYPE_GEOMETRY:
|
|
out= 0;
|
|
break;
|
|
default:
|
|
out= 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
} // end namespace mysql
|