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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <drizzled/error.h>
#include <drizzled/field.h>
#include <drizzled/item/hex_string.h>
#include <drizzled/item/string.h>
#include <drizzled/type/decimal.h>
#include <algorithm>
using namespace std;
namespace drizzled
{
static char _dig_vec_lower[] =
"0123456789abcdefghijklmnopqrstuvwxyz";
inline uint32_t char_val(char X)
{
return (uint32_t) (X >= '0' && X <= '9' ? X-'0' :
X >= 'A' && X <= 'Z' ? X-'A'+10 :
X-'a'+10);
}
Item_hex_string::Item_hex_string(const char *str, uint32_t str_length)
{
max_length=(str_length+1)/2;
char *ptr=(char*) memory::sql_alloc(max_length+1);
if (!ptr)
return;
str_value.set(ptr,max_length,&my_charset_bin);
char *end=ptr+max_length;
if (max_length*2 != str_length)
*ptr++=char_val(*str++); // Not even, assume 0 prefix
while (ptr != end)
{
*ptr++= (char) (char_val(str[0])*16+char_val(str[1]));
str+=2;
}
*ptr=0; // Keep purify happy
collation.set(&my_charset_bin, DERIVATION_COERCIBLE);
fixed= 1;
unsigned_flag= 1;
}
int64_t Item_hex_string::val_int()
{
// following assert is redundant, because fixed=1 assigned in constructor
assert(fixed == 1);
char *end= (char*) str_value.ptr()+str_value.length(),
*ptr= end - min(str_value.length(), sizeof(int64_t));
uint64_t value=0;
for (; ptr != end ; ptr++)
value=(value << 8)+ (uint64_t) (unsigned char) *ptr;
return (int64_t) value;
}
type::Decimal *Item_hex_string::val_decimal(type::Decimal *decimal_value)
{
// following assert is redundant, because fixed=1 assigned in constructor
assert(fixed == 1);
uint64_t value= (uint64_t)val_int();
int2_class_decimal(E_DEC_FATAL_ERROR, value, true, decimal_value);
return (decimal_value);
}
int Item_hex_string::save_in_field(Field *field, bool)
{
field->set_notnull();
if (field->result_type() == STRING_RESULT)
return field->store(str_value.ptr(), str_value.length(),
collation.collation);
uint64_t nr;
uint32_t length= str_value.length();
if (length > 8)
{
nr= field->flags & UNSIGNED_FLAG ? UINT64_MAX : INT64_MAX;
goto warn;
}
nr= (uint64_t) val_int();
if ((length == 8) && !(field->flags & UNSIGNED_FLAG) && (nr > INT64_MAX))
{
nr= INT64_MAX;
goto warn;
}
return field->store((int64_t) nr, true); // Assume hex numbers are unsigned
warn:
if (!field->store((int64_t) nr, true))
field->set_warning(DRIZZLE_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE,
1);
return 1;
}
void Item_hex_string::print(String *str, enum_query_type)
{
char *end= (char*) str_value.ptr() + str_value.length(),
*ptr= end - min(str_value.length(), sizeof(int64_t));
str->append("0x");
for (; ptr != end ; ptr++)
{
str->append(_dig_vec_lower[((unsigned char) *ptr) >> 4]);
str->append(_dig_vec_lower[((unsigned char) *ptr) & 0x0F]);
}
}
bool Item_hex_string::eq(const Item *arg, bool binary_cmp) const
{
if (arg->basic_const_item() && arg->type() == type())
{
if (binary_cmp)
return !stringcmp(&str_value, &arg->str_value);
return !sortcmp(&str_value, &arg->str_value, collation.collation);
}
return false;
}
Item *Item_hex_string::safe_charset_converter(const CHARSET_INFO * const tocs)
{
Item_string *conv;
String tmp, *str= val_str(&tmp);
if (!(conv= new Item_string(str->ptr(), str->length(), tocs)))
return NULL;
conv->str_value.copy();
conv->str_value.mark_as_const();
return conv;
}
} /* namespace drizzled */
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