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2015.1.3
by Brian Aker
Merge in CAST operators for SIGNED/UNSIGNED |
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/* - mode: c++ c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2010 Brian Aker
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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 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 "config.h" |
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#include "drizzled/function/cast/unsigned.h" |
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#include "drizzled/error.h" |
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namespace drizzled { |
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namespace function { |
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namespace cast { |
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void Unsigned::print(String *str, enum_query_type query_type) |
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{
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str->append(STRING_WITH_LEN("cast(")); |
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args[0]->print(str, query_type); |
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str->append(STRING_WITH_LEN(" as unsigned)")); |
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}
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int64_t Unsigned::val_int() |
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{
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int64_t value= 0; |
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int error= 0; |
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char buff[MAX_FIELD_WIDTH]; |
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String tmp(buff,sizeof(buff), &my_charset_bin), *res; |
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/*
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For a string result, we must first get the string and then convert it
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to a longlong
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*/
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if (not (res= args[0]->val_str(&tmp))) |
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{
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null_value= true; |
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error= 0; |
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return 0; |
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}
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null_value= false; |
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char *end= res->ptr() + res->length(); |
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if (res->length() and ((char *)res->ptr())[0] == '-') |
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{
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error= -1; |
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}
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else
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{
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value= res->charset()->cset->strntoull10rnd(res->charset(), |
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res->ptr(), |
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res->length(), |
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true, &end, &error); |
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}
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if (error or (end != res->ptr() + res->length())) |
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{
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my_error(ER_INVALID_CAST_TO_UNSIGNED, MYF(0), res->c_str()); |
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}
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return value; |
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}
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} // namespace cast |
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} // namespace function |
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} // namespace drizzled |