Difference between revisions of "SDK Function Levels"
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====Level 1==== | ====Level 1==== | ||
| − | Functions available at [[Overview of Level 1|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: | + | Functions available at [[SDK Overview of Level 1|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: |
<code lang="recital"> | <code lang="recital"> | ||
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====Level 2==== | ====Level 2==== | ||
| − | Functions available at [[Overview of Level 2|level 2]] are high-level functions used to execute RECITAL commands and evaluate expressions. | + | Functions available at [[SDK Overview of Level 2|level 2]] are high-level functions used to execute RECITAL commands and evaluate expressions. |
====Level 3==== | ====Level 3==== | ||
| − | Functions available at [[Overview of Level 3|level 3]] are low-level functions separated into the following category dependent usage. | + | Functions available at [[SDK Overview of Level 3|level 3]] are low-level functions separated into the following category dependent usage. |
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====Level 4==== | ====Level 4==== | ||
| − | Functions available at [[Overview of Level 4|level 4]] are for use with building classes and managing objects. | + | Functions available at [[SDK Overview of Level 4|level 4]] are for use with building classes and managing objects. |
[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:SDK]] | [[Category:SDK]] | ||
[[Category:Reference]] | [[Category:Reference]] | ||
Latest revision as of 14:13, 30 March 2009
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 level 4 are for use with building classes and managing objects.
