SDK Function Levels

The API (Applications Programming Interface) provides a library of 'C' functions that are divided into four different levels.

Level 1

Functions available at level 1 are for use with parameter passing between Recital and your C function. These are used to check the type and number of parameters passed and to convert Recital data types to C data types. A 'C' UDF which uses the RECITAL/API can have a variable number of parameters passed to it from Recital. For example:

store "RECITAL" to m_string
store 7.0 to m_value
m_result = dbapi_udf ( m_string, m_value)

Level 2

Functions available at level 2 are high-level functions used to execute RECITAL commands and evaluate expressions.

Level 3

Functions available at level 3 are low-level functions separated into the following category dependent usage.

TYPE	DESCRIPTION
ARRAY	Recital array access
BLOB	Operations on binary large objects
CHARACTER	Character string functions
CURRENCY	Currency functions
DATE	Date, datetime and time functions
DBF	Database I/O operations
FIELD	Field I/O operations
MEMO	Memo I/O operations
MEMVAR	Recital memory variable operations

Level 4

Functions available at [[Overview of Level 4|level 4] are for use with building classes and managing objects.