time-to-botec/js/node_modules/@stdlib/strided/napi/unary/README.md

Unary

C API for registering a Node-API module exporting a strided array interface for applying a unary callback to an input strided array.

Usage

var headerDir = require( '@stdlib/strided/napi/unary' );

headerDir

Absolute file path for the directory containing header files for C APIs.

var dir = headerDir;
// returns <string>

Examples

var headerDir = require( '@stdlib/strided/napi/unary' );

console.log( headerDir );
// => <string>

---

C APIs

Usage

#include "stdlib/strided/napi/unary.h"

stdlib_strided_napi_unary( env, info, *obj )

Invokes a strided array interface which applies a unary callback to an input strided array based on provided JavaScript arguments.

#include "stdlib/strided/base/function_object.h"
#include <node_api.h>

// ...

static const struct StridedFunctionObject obj = {...};

// ...

/**
* Receives JavaScript callback invocation data.
*
* @param env    environment under which the function is invoked
* @param info   callback data
* @return       Node-API value
*/
napi_value addon( napi_env env, napi_callback_info info ) {
    stdlib_strided_napi_unary( env, info, &obj );
    return NULL;
}

// ...

The function accepts the following arguments:

• env: [in] napi_env environment under which the function is invoked.
• info: [in] napi_callback_info callback data.
• obj: [in] struct StridedFunctionObject* strided array function object.

void stdlib_strided_napi_unary( napi_env env, napi_callback_info info, const struct StridedFunctionObject *obj );

STDLIB_STRIDED_NAPI_MODULE_UNARY( obj )

Macro for registering a Node-API module exporting a strided array interface for applying a unary callback to an input strided array.

#include "stdlib/strided/base/function_object.h"

// ...

// Create a strided function object:
static const struct StridedFunctionObject obj = {...};

// ...

// Register a Node-API module:
STDLIB_STRIDED_NAPI_MODULE_UNARY( obj );

The macro expects the following arguments:

• obj: struct StridedFunctionObject strided array function object.

When used, this macro should be used instead of NAPI_MODULE. The macro includes NAPI_MODULE, thus ensuring Node-API module registration.

Notes

• The function expects that the callback info argument provides access to the following JavaScript arguments:

  • N: number of indexed elements.
  • X: input typed array.
  • strideX: X stride length.
  • Y: destination typed array.
  • strideY: Y stride length.