Specify Boolean and Data Type Limit Identifiers

You can use configuration parameters to replace the default Boolean and data type limit identifiers. If you want to associate the data type limit identifiers with the data type names, consider replacing the default identifiers. You can also use configuration parameters to import a header file with the Boolean and data type limit identifier definitions.

Data Type Limit Identifiers

You can control the data type limit identifiers in the generated code by using the configuration parameters in this table.

Configuration Parameter	Default Identifier
Configuration Parameter	`DataTypeReplacement` = `'CoderTypedefs'`	`DataTypeReplacement` = `'CDataTypesFixedWidth'`
64-bit integer maximum identifier (`MaxIdInt64`)	`MAX_int64_T`	`INT64_MAX`
16-bit integer maximum identifier (`MaxIdInt16`)	`MAX_int16_T`	`INT16_MAX`
32-bit integer maximum identifier (`MaxIdInt32`)	`MAX_int32_T`	`INT32_MAX`
8-bit integer maximum identifier (`MaxIdInt8`)	`MAX_int8_T`	`INT8_MAX`
64-bit unsigned integer maximum identifier (`MaxIdUint64`)	`MAX_uint64_T`	`UINT64_MAX`
16-bit unsigned integer maximum identifier (`MaxIdUint16`)	`MAX_uint16_T`	`UINT16_MAX`
32-bit unsigned integer maximum identifier (`MaxIdUint32`)	`MAX_uint32_T`	`UINT32_MAX`
8-bit unsigned integer maximum identifier (`MaxIdUint8`)	`MAX_uint8_T`	`UINT8_MAX`
64-bit integer minimum identifier (`MinIdInt64`)	`MIN_int64_T`	`INT64_MIN`
16-bit integer minimum identifier (`MinIdInt16`)	`MIN_int16_T`	`INT16_MIN`
32-bit integer minimum identifier (`MinIdInt32`)	`MIN_int32_T`	`INT32_MIN`
8-bit integer minimum identifier (`MinIdInt8`)	`MIN_int8_T`	`INT8_MIN`

For example, to change the default identifiers for the 8-bit integer data limit minimum and maximum to s4g_S4MIN and s4g_S4MAX, respectively:

set_param(gcs,'MinIdInt8','s4g_S4MIN');
set_param(gcs,'MaxIdInt8','s4g_S4MAX')

If you do not import a header file, the generated file rtwtypes.h defines the 8-bit integer data minimum and maximum identifiers:

#define s4g_S4MAX                      ((int8_T)(127))
#define s4g_S4MIN                      ((int8_T)(-128))

If you do import a header file defining the data type limit identifiers, the header file is included in rtwtypes.h.

Boolean Identifiers

You can control the Boolean identifiers in the generated code by using the configuration parameters in this table. When changing Boolean identifiers, you must define false to be numerically equivalent to 0, and true to be numerically equivalent to 1.

Boolean	Configuration Parameter	Default Identifier
True	Boolean true identifier (`BooleanTrueId`)	`true`
False	Boolean false identifier (`BooleanFalseId`)	`false`

For example, to change the default Boolean true and false identifiers:

set_param(gcs,'BooleanTrueId','bTrue');
set_param(gcs,'BooleanFalseId','bFalse')

If you do not import a header file, the generated file rtwtypes.h defines the Boolean identifiers:

#define bFalse                         (0U)
#define bTrue                          (1U)

If you do import a header file defining the Boolean identifiers, the header file is included in rtwtypes.h.

Note

When changing Boolean identifiers, you must define false to be numerically equivalent to 0, and true to be numerically equivalent to 1.

Boolean and Data Type Limit Identifier Header Files

You can import a header file that defines Boolean and data type limit identifiers by using the configuration parameter Type limit identifier replacement header file or command-line parameter TypeLimitIdReplacementHeaderFile. The header file is included in rtwtypes.h. You must use the command-line parameters to specify the Boolean and data type limit identifiers that are included in the imported header file.

For example, if you have a header file myfile.h with data type limit definitions, use TypeLimitIdReplacementHeaderFile to include the definitions in the generated code:

set_param(gcs,'TypeLimitIdReplacementHeaderFile','myfile.h');

The generated file rtwtypes.h includes myfile.h.

/* Import type limit identifier replacement definitions. */
#include "myfile.h"