gd_uninclude(3)

NAME

gd_uninclude—remove a format specification fragment from a Dirfile

SYNOPSIS

#include <getdata.h>

int gd_uninclude(DIRFILE *dirfile, int fragment_index, int del);

DESCRIPTION

The gd_uninclude() removes the format specification fragment indexed by fragment_index from the specified dirfile, as well as any fragments the indicated fragment INCLUDEs. Fields defined in the removed fragments will be removed from the dirfile.

Before removing the specified fragment, all pending writes are flushed to RAW fields defined the the removed fragments. If del is zero, metadata changes will also be written to the removed fragments. If del is non-zero, the format specification fragments will be deleted from disk, if possible. Regardless of the value of del, binary data files associated with RAW fields defined in the removed fragments will not be deleted. To delete these binary files, use gd_delete(3) before calling this function.

The primary format specification (the fragment indexed by zero) cannot be removed from the dirfile.

RETURN VALUE

On success, gd_uninclude() returns zero. On error, a negative-valued error code is returned. Possible error codes are:

GD_E_ACCMODE: The supplied dirfile was opened in read-only mode.
GD_E_ALLOC: The library was unable to allocate memory.
GD_E_BAD_DIRFILE: The supplied dirfile was invalid.
GD_E_BAD_INDEX: The supplied fragment index was out of range, or an attempt was made to remove the primary format specification.
GD_E_IO: An I/O error occurred while trying to write modified data or metadata to disk.
GD_E_PROTECTED: The metadata of the fragment which included the removed fragment was protected from change.

The error code is also stored in the DIRFILE object and may be retrieved after this function returns by calling gd_error(3). A descriptive error string for the error may be obtained by calling gd_error_string(3).

NOTES

This function re-arranges the remaining format specification fragments in some unspecified way, except for the primary fragment, which is guaranteed to remain at index zero. Callers which cache format specification fragment indices must re-initialise their cache after calling this function.

HISTORY

The dirfile_uninclude() function appeared in GetData-0.5.0.

In GetData-0.7.0, this function was renamed to gd_uninclude().

In GetData-0.10.0, the error return from this function changed from −1 to a negative-valued error code.