gd_rename(3)

NAME
gd_rename — change the name of a dirfile field

SYNOPSIS
#include <getdata.h>

int gd_rename(DIRFILE *dirfile, const char *old_code, const char *new_name, int move_data);

DESCRIPTION
The gd_rename() function changes the name of the field specified by old_code, which should not contain a representation suffix, defined in the dirfile specified by dirfile to new_name. If the new name is the same as the old name, this function does nothing. When renaming a metafield, the metafield should be specified in old_code by its full (slashed) field code, while new_name should only contain the new name (without slash). If the flag move_data is non-zero, and old_code specifies a RAW field, the binary file associated with the field will be renamed as well. If move_data is zero, no changes will be made to the binary file. If field_code specifies a field of type other than RAW, the move_data flag is ignored.

RETURN VALUE
On success, gd_rename() returns zero. On error, -1 is returned and the dirfile error is set to a non-zero error value. Possible error values are:

GD_E_ACCMODE
    The specified dirfile was opened read-only.

GD_E_ALLOC
    The library was unable to allocate memory.

GD_E_BAD_CODE
    The field specified by old_code was not found.

GD_E_BAD_DIRFILE
    The supplied dirfile was invalid.

GD_E_BAD_FIELD_TYPE
    An attempt was made to rename the immutable INDEX field.

GD_E_BAD_REPR
    The representation suffix specified in field_code was not recognised.

GD_E_DUPLICATE
    The new name specified is already in use by another field.

GD_E_PROTECTED
    The metadata of the format specification fragment containing the field was protected from change, or the binary data of the fragments was protected from change and binary file translation was requested.

GD_E_RAW_IO
    An I/O error occurred while attempting to rename the binary file.

GD_E_UNKNOWN_ENCODING
    The encoding scheme of the specified field could not be determined or was not understood by GetData.

GD_E_UNSUPPORTED
    The encoding scheme of the field does not support binary file renaming.

The dirfile error may be retrieved by calling gd_error(3). A descriptive error string for the last error encountered can be obtained from a call to gd_error_string(3).

SEE ALSO
gd_metaflush(3), gd_open(3), gd_error(3), gd_error_string(3), dirfile(5), dirfile-format(5)