/* Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.

   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 */

#include "rpl_gtid.h"


/*
const size_t Uuid::TEXT_LENGTH;
const size_t Uuid::BYTE_LENGTH;
const size_t Uuid::BIT_LENGTH;
*/
const int Uuid::bytes_per_section[Uuid::NUMBER_OF_SECTIONS]=
{ 4, 2, 2, 2, 6 };
const int Uuid::hex_to_byte[]=
{
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, -1, -1, -1, -1, -1, -1,
  -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};


enum_return_status Uuid::parse(const char *s)
{
  DBUG_ENTER("Uuid::parse");
  unsigned char *u= bytes;
  unsigned char *ss= (unsigned char *)s;
  for (int i= 0; i < NUMBER_OF_SECTIONS; i++)
  {
    if (i > 0)
    {
      if (*ss != '-')
        RETURN_UNREPORTED_ERROR;
      ss++;
    }
    for (int j= 0; j < bytes_per_section[i]; j++)
    {
      int hi= hex_to_byte[*ss];
      if (hi == -1)
        RETURN_UNREPORTED_ERROR;
      ss++;
      int lo= hex_to_byte[*ss];
      if (lo == -1)
        RETURN_UNREPORTED_ERROR;
      ss++;
      *u= (hi << 4) + lo;
      u++;
    }
  }
  RETURN_OK;
}


bool Uuid::is_valid(const char *s)
{
  DBUG_ENTER("Uuid::is_valid");
  const unsigned char *ss= (const unsigned char *)s;
  for (int i= 0; i < NUMBER_OF_SECTIONS; i++)
  {
    if (i > 0)
    {
      if (*ss != '-')
        DBUG_RETURN(false);
      ss++;
    }
    for (int j= 0; j < bytes_per_section[i]; j++)
    {
      if (hex_to_byte[*ss] == -1)
        DBUG_RETURN(false);
      ss++;
      if (hex_to_byte[*ss] == -1)
        DBUG_RETURN(false);
      ss++;
    }
  }
  DBUG_RETURN(true);
}


size_t Uuid::to_string(const uchar* bytes_arg, char *buf)
{
  DBUG_ENTER("Uuid::to_string");
  static const char byte_to_hex[]= "0123456789abcdef";
  const unsigned char *u= bytes_arg;
  for (int i= 0; i < NUMBER_OF_SECTIONS; i++)
  {
    if (i > 0)
    {
      *buf= '-';
      buf++;
    }
    for (int j= 0; j < bytes_per_section[i]; j++)
    {
      int byte= *u;
      *buf= byte_to_hex[byte >> 4];
      buf++;
      *buf= byte_to_hex[byte & 0xf];
      buf++;
      u++;
    }
  }
  *buf= '\0';
  DBUG_RETURN(TEXT_LENGTH);
}


size_t Uuid::to_string(char *buf) const
{
  return to_string(bytes, buf);
}
