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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/session.h>
#include <drizzled/error.h>
#include <drizzled/item/string.h>
namespace drizzled
{
Item *Item_string::safe_charset_converter(const CHARSET_INFO * const tocs)
{
Item_string *conv;
size_t conv_errors;
char *ptr;
String tmp, cstr, *ostr= val_str(&tmp);
cstr.copy(ostr->ptr(), ostr->length(), ostr->charset(), tocs, &conv_errors);
if (conv_errors || !(conv= new Item_string(cstr.ptr(), cstr.length(),
cstr.charset(),
collation.derivation)))
{
/*
Safe conversion is not possible (or EOM).
We could not convert a string into the requested character set
without data loss. The target charset does not cover all the
characters from the string. Operation cannot be done correctly.
*/
return NULL;
}
if (!(ptr= current_session->strmake(cstr.ptr(), cstr.length())))
return NULL;
conv->str_value.set(ptr, cstr.length(), cstr.charset());
/* Ensure that no one is going to change the result string */
conv->str_value.mark_as_const();
return conv;
}
Item *Item_static_string_func::safe_charset_converter(const CHARSET_INFO * const tocs)
{
Item_string *conv;
size_t conv_errors;
String tmp, cstr, *ostr= val_str(&tmp);
cstr.copy(ostr->ptr(), ostr->length(), ostr->charset(), tocs, &conv_errors);
if (conv_errors ||
!(conv= new Item_static_string_func(func_name,
cstr.ptr(), cstr.length(),
cstr.charset(),
collation.derivation)))
{
/*
Safe conversion is not possible (or EOM).
We could not convert a string into the requested character set
without data loss. The target charset does not cover all the
characters from the string. Operation cannot be done correctly.
*/
return NULL;
}
conv->str_value.copy();
/* Ensure that no one is going to change the result string */
conv->str_value.mark_as_const();
return conv;
}
bool Item_string::eq(const Item *item, bool binary_cmp) const
{
if (type() == item->type() && item->basic_const_item())
{
if (binary_cmp)
return !stringcmp(&str_value, &item->str_value);
return (collation.collation == item->collation.collation &&
!sortcmp(&str_value, &item->str_value, collation.collation));
}
return 0;
}
void Item_string::print(String *str, enum_query_type query_type)
{
if (query_type == QT_ORDINARY && is_cs_specified())
{
str->append('_');
str->append(collation.collation->csname);
}
str->append('\'');
str_value.print(str);
str->append('\'');
}
double Item_string::val_real()
{
assert(fixed == 1);
int error;
char *end, *org_end;
double tmp;
const CHARSET_INFO * const cs= str_value.charset();
org_end= (char*) str_value.ptr() + str_value.length();
tmp= my_strntod(cs, (char*) str_value.ptr(), str_value.length(), &end,
&error);
if (error || (end != org_end && !check_if_only_end_space(cs, end, org_end)))
{
/*
We can use str_value.ptr() here as Item_string is gurantee to put an
end \0 here.
*/
push_warning_printf(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
ER_TRUNCATED_WRONG_VALUE,
ER(ER_TRUNCATED_WRONG_VALUE), "DOUBLE",
str_value.ptr());
}
return tmp;
}
/**
@todo
Give error if we wanted a signed integer and we got an unsigned one
*/
int64_t Item_string::val_int()
{
assert(fixed == 1);
int err;
int64_t tmp;
char *end= (char*) str_value.ptr()+ str_value.length();
char *org_end= end;
const CHARSET_INFO * const cs= str_value.charset();
tmp= (*(cs->cset->strtoll10))(cs, str_value.ptr(), &end, &err);
/*
TODO: Give error if we wanted a signed integer and we got an unsigned
one
*/
if (err > 0 ||
(end != org_end && !check_if_only_end_space(cs, end, org_end)))
{
push_warning_printf(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
ER_TRUNCATED_WRONG_VALUE,
ER(ER_TRUNCATED_WRONG_VALUE), "INTEGER",
str_value.ptr());
}
return tmp;
}
type::Decimal *Item_string::val_decimal(type::Decimal *decimal_value)
{
return val_decimal_from_string(decimal_value);
}
int Item_string::save_in_field(Field *field, bool)
{
String *result;
result=val_str(&str_value);
return save_str_value_in_field(field, result);
}
} /* namespace drizzled */
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