“内存集"没有DLL，所以怎么ctype [英] "memset" has no DLL so how ctype it

问题描述

如何在jsctypes中使用memset.没有它的DLL.我搜索/搜索了js ctype代码，但找不到要翻录的示例.

How to use memset in jsctypes. There no DLL for it. I searched/scoured js ctype codes but couldn't find an example to rip.

推荐答案

如果您只想将数组memset设置为零字节，那么我有一个好消息，大家":js-ctypes会将新数组初始化为零.

If you just want to memset an array to zero-bytes, then I have "Good news, everyone": js-ctypes will initialize new arrays to zero.

否则，创建一个类型化的数组，对其进行初始化并创建一个指向该数组的指针可能是最简单的.

Otherwise it would be probably easiest to just create a typed array, initialize it, and create a pointer to it.

显然，这些天，您也可以直接在ctypes数组上设置数组元素(前提是数组类型的大小已知)...

Apparently you can also set array elements directly on a ctypes array these days (provided the array type has a known size)...

// Note that size is the number of array elements to set,
// not the number of bytes.
function memset(array, val, size) {
 for (var i = 0; i < size; ++i) {
   array[i] = val;
 }
}

var a = ctypes.uint8_t.array()(10);
memset(a, 0xde, a.length);
console.log(a.toSource());
// "ctypes.uint8_t.array(10)([222, 222, 222, 222, 222, 222, 222, 222, 222, 222])"

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