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  • Committer: Monty Taylor
  • Date: 2008-11-16 06:29:53 UTC
  • mto: (584.1.9 devel)
  • mto: This revision was merged to the branch mainline in revision 589.
  • Revision ID: monty@inaugust.com-20081116062953-ivdltjmfe009b5fr
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storage/csv/transparent_file.cc
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  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
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#include "config.h"
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#include <cstdlib>
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#include "drizzled/internal/my_sys.h"
 
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#include <drizzled/common_includes.h>
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#include "transparent_file.h"
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using namespace drizzled;
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Transparent_file::Transparent_file() : lower_bound(0), buff_size(IO_SIZE)
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{
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  buff= static_cast<unsigned char *>(malloc(buff_size*sizeof(unsigned char)));
 
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{ 
 
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  buff= (unsigned char *) my_malloc(buff_size*sizeof(unsigned char),  MYF(MY_WME)); 
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}
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Transparent_file::~Transparent_file()
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{
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  free(buff);
 
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{ 
 
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  free((unsigned char*)buff); 
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}
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void Transparent_file::init_buff(int filedes_arg)
 
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void Transparent_file::init_buff(File filedes_arg)
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{
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  filedes= filedes_arg;
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  /* read the beginning of the file */
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  lower_bound= 0;
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  lseek(filedes, 0, SEEK_SET);
 
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  my_seek(filedes, 0, MY_SEEK_SET, MYF(0));
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  if (filedes && buff)
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    upper_bound= internal::my_read(filedes, buff, buff_size, MYF(0));
 
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    upper_bound= my_read(filedes, buff, buff_size, MYF(0));
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}
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unsigned char *Transparent_file::ptr()
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{
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  return buff;
 
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{ 
 
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  return buff; 
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}
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off_t Transparent_file::start()
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{
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  return lower_bound;
 
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{ 
 
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  return lower_bound; 
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}
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off_t Transparent_file::end()
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{
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  return upper_bound;
 
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{ 
 
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  return upper_bound; 
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}
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off_t Transparent_file::read_next()
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     No need to seek here, as the file managed by Transparent_file class
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     always points to upper_bound byte
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  */
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  if ((bytes_read= internal::my_read(filedes, buff, buff_size, MYF(0))) == MY_FILE_ERROR)
 
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  if ((bytes_read= my_read(filedes, buff, buff_size, MYF(0))) == MY_FILE_ERROR)
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    return (off_t) -1;
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  /* end of file */
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  if ((lower_bound <= offset) && (offset < upper_bound))
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    return buff[offset - lower_bound];
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  lseek(filedes, offset, SEEK_SET);
 
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  my_seek(filedes, offset, MY_SEEK_SET, MYF(0));
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  /* read appropriate portion of the file */
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  if ((bytes_read= internal::my_read(filedes, buff, buff_size,
 
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  if ((bytes_read= my_read(filedes, buff, buff_size,
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                           MYF(0))) == MY_FILE_ERROR)
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    return 0;
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