registerCFunctionEntry

Create function entry based on specified parameters and register in code replacement table

Syntax

entry = registerCFunctionEntry(hTable,priority,numInputs,functionName,inputType,implementationName,outputType,headerFile,genCallback,genFileName)

Description

entry = registerCFunctionEntry(hTable,priority,numInputs,functionName,inputType,implementationName,outputType,headerFile,genCallback,genFileName) provides a quick way to create and register a code replacement function entry.

This function can be used only if your function entry meets the following conditions:

• The input arguments are of the same type.

• The input argument names and the return argument name follow the default Simulink^® naming convention:

  • For input argument names, u1, u2, ..., un

  • For return argument, y1

Examples

Create C Function Entry in Table

This example shows how to use the registerCFunctionEntry function to create a C function entry for sqrt in a code replacement table.

hLib = RTW.TflTable;

hLib.registerCFunctionEntry(100, 1, 'sqrt', 'double', 'sqrt', ...
                            'double', '<math.h>', '', '');

Input Arguments

hTable — Handle to a code replacement table

handle

The hTable is a handle to a code replacement table previously returned by hTable = RTW.TflTable.

Example: hLib

priority — Specifies the search priority of the function entry

integer 0..100

The priority specifies the search priority of the function entry, relative to other entries of the same function name and conceptual argument list within this table. Highest priority is 0, and lowest priority is 100. If the table provides two implementations for a function, the implementation with the higher priority shadows the one with the lower priority.

Example: 100

numInputs — Specifies the number of input arguments

positive integer

Example: 1

functionName — Specifies the name of the function to replace

character vector | string scalar

The functionName specifies the name of the function to replace. The name must match a function name listed in “Code You Can Replace” in What Is Code Replacement Customization? (MATLAB^® code) or What Is Code Replacement Customization? (Simulink models).

Example: 'sqrt'

inputType — Specifies the data type of the input arguments

character vector | string scalar

This function requires that the input arguments are of the same type.

Example: 'double'

implementationName — Specifies the name of the implementation

character vector | string scalar

The implementationName specifies the name of the implementation. For example, if functionName is 'sqrt', implementationName can be 'sqrt' or a different name.

Example: 'sqrt'

outputType — Specifies the data type of the return argument

character vector | string scalar

Example: 'double'

headerFile — Specifies the header file that declares the implementation function

character vector | string scalar

Example: '<math.h>'

genCallback — Specifies callback that follows code generation

'' | 'RTW.copyFileToBuildDir'

The genCallback specifies a callback that follows code generation. If you specify 'RTW.copyFileToBuildDir', and if this function entry is matched and used, the code generator calls function RTW.copyFileToBuildDir after code generation. This callback function copies additional header, source, or object files that you have specified for this function entry to the build folder.

Example: ''

genFileName — Specifies ''

'' | character vector | string scalar

This argument is reserved for MathWorks developers.

Example: ''

Output Arguments

entry — Handle to the created code replacement function entry

handle

The entry is a handle to the created code replacement function entry. Specifying the return argument in the registerCFunctionEntry function call is optional.

Version History

Introduced in R2007b