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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 rfmtdouble() functionThe rfmtdouble() function uses a formatting mask to convert a C double value to a character string.

The rfmtdouble() function

The rfmtdouble() function uses a formatting mask to convert a C double value to a character string.

Syntax

mint rfmtdouble(dbl_val, fmtstring, outbuf)
   double dbl_val;
   char *fmtstring;
   char *outbuf;

dbl_val: The double number to format.
fmtstring: A pointer to a character buffer that contains the formatting mask for the value in dbl_val.
outbuf: A pointer to a character buffer to contain the formatted string for the value in dbl_val.

Usage

The fmtstring argument of the rfmtdouble() function points to the numeric-formatting mask, which contains characters that describe how to format the double value.

When you use rfmtdouble() to format MONEY values, the function uses the currency symbols that the DBMONEY environment variable specifies. If you do not set this environment variable, rfmtdouble() uses the currency symbols that the client locale defines. The default locale, U.S. English, defines currency symbols as if you set DBMONEY to ‘$,.’. (For a discussion of DBMONEY, see the HCL OneDB™ Guide to SQL: Reference.)

When you use a nondefault locale that has a multibyte code set, rfmtdouble() supports multibyte characters in the format string. For more information, see the HCL OneDB GLS User's Guide.

Return values

0: The conversion was successful.
-1211: The program ran out of memory (memory-allocation error).
-1217: The format string is too large.