/* Zutils - Utilities dealing with compressed files
   Copyright (C) 2009-2022 Antonio Diaz Diaz.

   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, either version 2 of the License, or
   (at your option) any later version.

   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, see <http://www.gnu.org/licenses/>.
*/

inline const char * name_or_stdin( const char * const name )
  { return ( name[0] == '-' && name[1] == 0 ) ? "(stdin)" : name; }

int readblock( const int fd, uint8_t * const buf, const int size );
int writeblock( const int fd, const uint8_t * const buf, const int size );
bool feed_data( const std::string & filename, const int infd, const int outfd,
                const uint8_t * magic_data, const int magic_size );

struct Children
  {
  const char * compressor_name;
  pid_t pid[2];				// data feeder, compressor
  };
bool good_status( const Children & children, const bool finished );
bool set_data_feeder( const std::string & filename, int * const infdp,
                      Children & children, int format_index );

enum { magic_buf_size = 10 };		// >= longest extended magic (bzip2)

// Return format_index, or -1 if uncompressed.
//
int test_format( const int infd, uint8_t magic_data[],
                 int * const magic_sizep );
