[JS]How to transform from float to buffer by javascript

2021-9-9 萧 写技术 

<head>
<title>Float to Buffer</title>

</head>


Input Float:
<textarea id="in"></textarea>

Output ASCII:
<textarea id="out"></textarea>

<input type="button" value="Transfor" onclick="transf();" />


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<a href="http://log.anycle.com">author:Anycle</a>

<style>
textarea{width:100%; margin:20px 0; }
input{width:200px; padding:5px; margin:auto;}
</style>

<script>

var hex = function(x){
	switch(x){
		case 10:
			y = 'A';
			break;
		case 11:
			y = 'B';
			break;
		case 12:
			y = 'C';
			break;
		case 13:
			y = 'D';
			break;
		case 14:
			y = 'E';
			break;
		case 15:
			y = 'F';
			break;	
		default:
			y = x.toString();
	}	
	return y;
}

var dec2hex = function(x){
	return hex( Math.floor(x/16) ) + hex(x%16);
}

var transf = function(){
	sin = document.getElementById("in").value;
	
	var ff = new Float32Array(1);
	ff[0] = sin;
	var ii = new Uint32Array(ff.buffer);
	console.log(ii);
	
	hh = "";
	yy = "";
	for(i=0; i<4; i++){
		hh = ii % 256;
		hh = dec2hex(hh);
		yy = yy + hh + " ";
		
		ii = Math.floor(ii/256);
	}

	document.getElementById("out").value = yy;
	
}
</script>

标签: JS

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