/*
 Copyright 2010 Sun Microsystems, Inc.
 All rights reserved. Use is subject to license terms.

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License, version 2.0,
 as published by the Free Software Foundation.

 This program is also distributed with certain software (including
 but not limited to OpenSSL) that is licensed under separate terms,
 as designated in a particular file or component or in included license
 documentation.  The authors of MySQL hereby grant you an additional
 permission to link the program and your derivative works with the
 separately licensed software that they have included with MySQL.

 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, version 2.0, 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
*/
/*
 * decimal_utils.cpp
 */

#include "my_global.h"
#include "m_string.h"
C_MODE_START
#include "decimal.h"
C_MODE_END

#include "decimal_utils.hpp"

int decimal_str2bin(const char *str, int str_len,
                    int prec, int scale,
                    void *bin, int bin_len)
{
    register int retval;                      /* return value from str2dec() */
    decimal_t dec;                            /* intermediate representation */
    decimal_digit_t digits[9];                /* for dec->buf */
    char *end = (char *) str + str_len;       
    
    assert(str != 0);   
    assert(bin != 0);
    if(prec < 1) return E_DEC_BAD_PREC;
    if((scale < 0) || (scale > prec)) return E_DEC_BAD_SCALE;
    
    if(decimal_bin_size(prec, scale) > bin_len)
        return E_DEC_OOM;
    
    dec.len = 9;                              /* big enough for any decimal */
    dec.buf = digits;
    
    retval = string2decimal(str, &dec, &end);
    if(retval != E_DEC_OK) return retval;
    
    return decimal2bin(&dec, (unsigned char *) bin, prec, scale);
}

int decimal_bin2str(const void *bin, int bin_len,
                    int prec, int scale, 
                    char *str, int str_len)
{
    register int retval;                      /* return from bin2decimal() */
    decimal_t dec;                            /* intermediate representation */
    decimal_digit_t digits[9];                /* for dec->buf */
    int to_len;
    
    assert(bin != 0);
    assert(str != 0);
    if(prec < 1) return E_DEC_BAD_PREC;
    if((scale < 0) || (scale > prec)) return E_DEC_BAD_SCALE;
    
    dec.len = 9;                              /* big enough for any decimal */
    dec.buf = digits;
    
    // Note: bin_len is unused -- bin2decimal() does not take a length
    retval = bin2decimal((const uchar *) bin, &dec, prec, scale);
    if(retval != E_DEC_OK) return retval;
    
    to_len = decimal_string_size(&dec);
    if(to_len > str_len) return E_DEC_OOM;   
    
    return decimal2string(&dec, str, &to_len, 0, 0, 0);
}
