Returns information about a specified column. This routine is the preferred alternative to
- synopsis: #include ”SDDS.h”
int32_t SDDS_GetColumnInformation(SDDS_TABLE *SDDS_table, char *field_name, void
*memory, int32_t mode, name-or-index)
- SDDS_table: Address of the SDDS_TABLE structure for the data set.
- field_name: A NULL terminated string giving the name of the field that information
is requested for. These field names are identical to the names used in the namelist
- memory: The address in which to place the information. Should have type data-type*
in the user’s program, where data-type is the data type of the information. Note that for
STRING information, data-type is char *. If memory is NULL, the existence and type
of the information will be verified; the type will be returned as usual.
- mode: One of the following constants (defined in SDDS.h):
- SDDS_GET_BY_NAME - Indicates that the next argument is a NULL-terminated
character string containing the name of the column for which information is desired.
- SDDS_GET_BY_INDEX - Indicates that the next argument is a non-negative
integer giving the index of the column for which information is desired. This index
is obtained from SDDS_DefineColumn or SDDS_GetColumnIndex.
- return value:
On success, returns the SDDS data type of the information. This is one of the following
constants (defined in SDDS.h): SDDS_LONGDOUBLE, SDDS_DOUBLE, SDDS_FLOAT,
SDDS_LONG, SDDS_ULONG, SDDS_SHORT, SDDS_USHORT, SDDS_CHARACTER, or
On failure, returns zero and records an error message.
- see also: