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parttimejob/node_modules/node-hex/lib/index.js

54 lines
1.0 KiB

'use strict';
var zero = function (n, max) {
n = n.toString(16).toUpperCase();
while (n.length < max) {
n = '0' + n;
}
return n;
};
module.exports = function (buffer) {
var rows = Math.ceil(buffer.length / 16);
var last = buffer.length % 16 || 16;
var offsetLength = buffer.length.toString(16).length;
if (offsetLength < 6) offsetLength = 6;
var i;
var str = '';
var b = 0;
var lastBytes;
var lastSpaces;
var v;
for (i = 0; i < rows; i++) {
str += '\u001b[36m' + zero(b, offsetLength) + '\u001b[0m ';
lastBytes = i === rows - 1 ? last : 16;
lastSpaces = 16 - lastBytes;
var j;
for (j = 0; j < lastBytes; j++) {
str += ' ' + zero(buffer[b], 2);
b++;
}
for (j = 0; j < lastSpaces; j++) {
str += ' ';
}
b -= lastBytes;
str += ' ';
for (j = 0; j < lastBytes; j++) {
v = buffer[b];
str += (v > 31 && v < 127) || v > 159 ? String.fromCharCode(v) : '.';
b++;
}
str += '\n';
}
return str;
};