Esempi in C++ (Cpp) per _btf_open

Esempio n. 1

File: btfiles.cpp Progetto: OPSF/uClinux

ssize_t btFiles::IO(char *buf, u_int64_t off, size_t len, const int iotype)
{
  u_int64_t n = 0;
  size_t pos,nio;
  BTFILE *pbf = m_btfhead;

  if( ( off + (u_int64_t)len ) > m_total_files_length) return -1;

  for(; pbf; pbf = pbf->bf_next){
    n += (u_int64_t) pbf->bf_length;
    if(n > off) break;
  }

  if( !pbf ) return -1;

  pos = (size_t) (off - (n - pbf->bf_length));

  for(; len ;){
    if( !pbf->bf_flag_opened ){
      if( _btf_open(pbf) < 0 ) return -1;
    }

    if( m_flag_automanage ) time(&pbf->bf_last_timestamp);

    if( fseek(pbf->bf_fp,(long) pos,SEEK_SET) < 0) return -1;

    nio = (len < pbf->bf_length - pos) ? len : (pbf->bf_length - pos);

    if(0 == iotype){
      if( 1 != fread(buf,nio,1,pbf->bf_fp) ) return -1;
    }else{
      if( 1 != fwrite(buf,nio,1,pbf->bf_fp) ) return -1;
    }

    len -= nio;
    buf += nio;

    if( len ){
      pbf = pbf->bf_next;
      if( !pbf ) return -1;
      pos = 0;
    }
  } // end for
  return 0;
}

Esempio n. 2

File: btfiles.cpp Progetto: akosciak/ctorrent_plus

ssize_t btFiles::IO(char *buf, uint64_t off, size_t len, const int iotype)
{
  uint64_t n = 0;
  off_t pos,nio;
  BTFILE *pbf = m_btfhead;

  if( (off + (uint64_t)len) > m_total_files_length ){
    CONSOLE.Warning(1, "error, data offset %llu length %lu out of range",
      (unsigned long long)off, (unsigned long)len);
    return -1;
  }

  for(; pbf; pbf = pbf->bf_next){
    n += (uint64_t) pbf->bf_length;
    if(n > off) break;
  }

  if( !pbf ){
    CONSOLE.Warning(1, "error, failed to find file for offset %llu",
      (unsigned long long)off);
    return -1;
  }

  pos = off - (n - pbf->bf_length);

  for(; len ;){
    if( (!pbf->bf_flag_opened || (iotype && pbf->bf_flag_readonly)) &&
        _btf_open(pbf, iotype) < 0 ){
      CONSOLE.Warning(1, "error, failed to open file \"%s\":  %s",
        pbf->bf_filename, strerror(errno));
      return -1;
    }

    pbf->bf_last_timestamp = now;

#ifdef HAVE_FSEEKO
    if( fseeko(pbf->bf_fp,pos,SEEK_SET) < 0 ){
#else
    if( fseek(pbf->bf_fp,(long) pos,SEEK_SET) < 0 ){
#endif
      CONSOLE.Warning(1, "error, failed to seek to %llu on file \"%s\":  %s",
        (unsigned long long)pos, pbf->bf_filename, strerror(errno));
      return -1;
    }
//  }

    nio = (len < pbf->bf_length - pos) ? len : (pbf->bf_length - pos);

    if(0 == iotype){
      errno = 0;
      if( 1 != fread(buf,nio,1,pbf->bf_fp) && ferror(pbf->bf_fp) ){
        CONSOLE.Warning(1, "error, read failed at %llu on file \"%s\":  %s",
          (unsigned long long)pos, pbf->bf_filename, strerror(errno));
        return -1;
      }
    }else{
      errno = 0;
      if( 1 != fwrite(buf,nio,1,pbf->bf_fp) ){
        CONSOLE.Warning(1, "error, write failed at %llu on file \"%s\":  %s",
          (unsigned long long)pos, pbf->bf_filename, strerror(errno));
        return -1;
      }
      if( fflush(pbf->bf_fp) == EOF ){
        CONSOLE.Warning(1, "error, flush failed at %llu on file \"%s\":  %s",
          (unsigned long long)pos, pbf->bf_filename, strerror(errno));
        return -1;
      }
    }

    len -= nio;
    buf += nio;

    if( len ){
      do{
        pbf = pbf->bf_next;
        if( !pbf ){
          CONSOLE.Warning(1,
            "error, data left over with no more files to write");
          return -1;
        }
      }while( 0==pbf->bf_length );
      pos = 0;
    }
  } // end for
  return 0;
}

int btFiles::_btf_destroy()
{
  BTFILE *pbf,*pbf_next;
  for(pbf = m_btfhead; pbf;){
    pbf_next = pbf->bf_next;
    if( pbf->bf_fp && pbf->bf_flag_opened ) fclose( pbf->bf_fp );
    if( pbf->bf_filename ) delete []pbf->bf_filename;
    if( pbf->bf_buffer ) delete []pbf->bf_buffer;
    delete pbf;
    pbf = pbf_next;
  }
  m_btfhead = (BTFILE*) 0;
  m_total_files_length = (uint64_t) 0;
  m_total_opened = 0;
  return 0;
}