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Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for HCL OneDB™.
Creating extensionsYou can create user-defined data types, routines, access methods, and other database objects to suit your needs. You can use application programming interfaces to write user-defined routines and applications that access data in HCL OneDB™ databases.
DataBlade® API Function ReferenceThe HCL OneDB™ DataBlade® API Function Reference describes the DataBlade® API functions and the subset of functions that the DataBlade® API supports.
Function descriptionsThis section gives comprehensive reference information about the functions that are valid within DataBlade® API modules. It lists the function descriptions in alphabetical order, with syntax, usage information, and return values for the functions.
The ifx_int8cvasc() functionThe ifx_int8cvasc() function converts a value held as printable characters in a C char type into an int8 type number.

The ifx_int8cvasc() function

The ifx_int8cvasc() function converts a value held as printable characters in a C char type into an int8 type number.

Syntax

mint ifx_int8cvasc(strng_val, len, int8_val)
   char *strng_val
   mint len;
   ifx_int8_t *int8_val;

strng_val: A pointer to a string.
len: The length of the strng_val string.
int8_val: A pointer to an int8 structure to contain the result of the conversion.

Usage

The character string, strng_val, can contain the following symbols:

A leading sign, either a plus (+) or minus (-)
An exponent that is preceded by either e or E
You can precede the exponent by a sign, either plus (+) or minus (-).

The strng_val character string must not contain a decimal separator or digits to the right of the decimal separator. The ifx_int8svasc() function truncates the decimal separator and any digits to the right of the decimal separator. The ifx_int8svasc() function ignores leading spaces in the character string.

When you use a nondefault locale (one other than U.S. English), ifx_int8svasc() supports non-ASCII characters in the strng_val character string. For more information, see the HCL OneDB™ GLS User's Guide.

Return values

0: The conversion was successful.
-1213: The string has non-numeric characters.
-1284: The operation resulted in overflow or underflow.