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+/* Zutils - Utilities dealing with compressed files
+ Copyright (C) 2009-2024 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 );