get_encoding (3) - Linux Manuals

get_encoding: report the binary encoding of data in a dirfile


get_encoding --- report the binary encoding of data in a dirfile


#include <getdata.h>
unsigned long get_encoding(DIRFILE *dirfile, int fragment_index);


The get_encoding() function queries a dirfile(5) database specified by dirfile and returns the binary encoding for the fragment indexed by fragment_index. The binary encoding of a fragment indicate the encoding of data stored in binary files associated with RAW fields defined in the specified fragment. The encoding of a fragment containing no RAW fields is ignored.


Upon successful completion, get_encoding() returns the binary encoding of the specified fragment, which will one of the following symbols:
GD_UNENCODED,~GD_TEXT_ENCODED,~GD_SLIM_ENCODED,~ GD_GZIP_ENCODED,~GD_BZIP2_ENCODED,~GD_LZMA_ENCODED,~ GD_ENC_UNSUPPORTED. See dirfile_cbopen(3) and dirfile-encoding(5) for the meanings of these symbols and details on the supported encoding schemes. If the encoding scheme specified in the dirfile metadata is unknown to GetData, GD_ENC_UNSUPPORTED will be returned. On error, it returns zero and sets the dirfile error to a non-zero error value. Possible error values are:
The supplied dirfile was invalid.
The supplied index was out of range. The dirfile error may be retrieved by calling get_error(3). A descriptive error string for the last error encountered can be obtained from a call to get_error_string(3).