~drizzle-trunk/drizzle/development

/* Copyright (C) 2000-2001, 2003-2004 MySQL AB

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* Mallocs for used in threads */

#include <drizzled/server_includes.h>

#include <drizzled/drizzled_error_messages.h>

extern "C" {

  void sql_alloc_error_handler(void)

  {

    sql_print_error(ER(ER_OUT_OF_RESOURCES));

  }

}

void init_sql_alloc(MEM_ROOT *mem_root, uint32_t block_size, uint32_t pre_alloc)

{

  init_alloc_root(mem_root, block_size, pre_alloc);

  mem_root->error_handler=sql_alloc_error_handler;

}

void *sql_alloc(size_t Size)

{

  MEM_ROOT *root= *(MEM_ROOT **)pthread_getspecific(THR_MALLOC);

  return alloc_root(root,Size);

}

void *sql_calloc(size_t size)

{

  void *ptr;

  if ((ptr=sql_alloc(size)))

    memset(ptr, 0, size);

  return ptr;

}

char *sql_strdup(const char *str)

{

  size_t len= strlen(str)+1;

  char *pos;

  if ((pos= (char*) sql_alloc(len)))

    memcpy(pos,str,len);

  return pos;

}

char *sql_strmake(const char *str, size_t len)

{

  char *pos;

  if ((pos= (char*) sql_alloc(len+1)))

  {

    memcpy(pos,str,len);

    pos[len]=0;

  }

  return pos;

}

void* sql_memdup(const void *ptr, size_t len)

{

  void *pos;

  if ((pos= sql_alloc(len)))

    memcpy(pos,ptr,len);

  return pos;

}

void sql_element_free(void *ptr __attribute__((unused)))

{} /* purecov: deadcode */

char *sql_strmake_with_convert(const char *str, size_t arg_length,

			       const CHARSET_INFO * const from_cs,

			       size_t max_res_length,

			       const CHARSET_INFO * const to_cs, size_t *result_length)

{

  char *pos;

  size_t new_length= to_cs->mbmaxlen*arg_length;

  max_res_length--;				// Reserve place for end null

  set_if_smaller(new_length, max_res_length);

  if (!(pos= (char*) sql_alloc(new_length+1)))

    return pos;					// Error

  if ((from_cs == &my_charset_bin) || (to_cs == &my_charset_bin))

  {

    // Safety if to_cs->mbmaxlen > 0

    new_length= cmin(arg_length, max_res_length);

    memcpy(pos, str, new_length);

  }

  else

  {

    uint32_t dummy_errors;

    new_length= copy_and_convert((char*) pos, new_length, to_cs, str,

				 arg_length, from_cs, &dummy_errors);

  }

  pos[new_length]= 0;

  *result_length= new_length;

  return pos;

}