AJ Keller
36 linhas
1021 B
JavaScript
36 linhas
1021 B
JavaScript
module.exports = {
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debugBytes
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};
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/**
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* @description Output passed bytes on the console as a hexdump, if enabled
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* @param prefix - label to show to the left of bytes
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* @param data - bytes to output, a buffer or string
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* @private
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*/
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function debugBytes (prefix, data) {
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if (typeof data === 'string') data = new Buffer(data);
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console.log('Debug bytes:');
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for (var j = 0; j < data.length;) {
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var hexPart = '';
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var ascPart = '';
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for (var end = Math.min(data.length, j + 16); j < end; ++j) {
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var byt = data[j];
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var hex = ('0' + byt.toString(16)).slice(-2);
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hexPart += (((j & 0xf) === 0x8) ? ' ' : ' '); // puts an extra space 8 bytes in
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hexPart += hex;
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var asc = (byt >= 0x20 && byt < 0x7f) ? String.fromCharCode(byt) : '.';
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ascPart += asc;
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}
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// pad to fixed width for alignment
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hexPart = (hexPart + ' ').substring(0, 3 * 17);
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console.log(prefix + ' ' + hexPart + '|' + ascPart + '|');
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}
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}
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