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/* Copyright (C) 2000 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 */
/* Open a temporary file and cache it with io_cache. Delete it on close */
#include "mysys_priv.h"
#include <mystrings/m_string.h>
#include <mysys/my_static.h>
#include <mysys/mysys_err.h>
#include <mysys/iocache.h>
/*
** Open tempfile cached by IO_CACHE
** Should be used when no seeks are done (only reinit_io_buff)
** Return false if cache is inited ok
** The actual file is created when the IO_CACHE buffer gets filled
** If dir is not given, use TMPDIR.
*/
bool open_cached_file(IO_CACHE *cache, const char* dir, const char *prefix,
size_t cache_size, myf cache_myflags)
{
cache->dir= dir ? strdup(dir) : (char*) 0;
cache->prefix= (prefix ? strdup(prefix) :
(char*) 0);
if ((cache->dir == NULL) || (cache->prefix == NULL))
return true;
cache->file_name=0;
cache->buffer=0; /* Mark that not open */
if (!init_io_cache(cache,-1,cache_size,WRITE_CACHE,0L,0,
MYF(cache_myflags | MY_NABP)))
{
return false;
}
free(cache->dir);
free(cache->prefix);
return true;
}
/* Create the temporary file */
bool real_open_cached_file(IO_CACHE *cache)
{
char name_buff[FN_REFLEN];
int error=1;
if ((cache->file=create_temp_file(name_buff, cache->dir, cache->prefix,
(O_RDWR | O_TRUNC),
MYF(MY_WME))) >= 0)
{
error=0;
my_delete(name_buff,MYF(MY_WME | ME_NOINPUT));
}
return(error);
}
void close_cached_file(IO_CACHE *cache)
{
if (my_b_inited(cache))
{
File file=cache->file;
cache->file= -1; /* Don't flush data */
(void) end_io_cache(cache);
if (file >= 0)
{
(void) my_close(file,MYF(0));
#ifdef CANT_DELETE_OPEN_FILES
if (cache->file_name)
{
(void) my_delete(cache->file_name,MYF(MY_WME | ME_NOINPUT));
free(cache->file_name);
}
#endif
}
free(cache->dir);
free(cache->prefix);
}
return;
}
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