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Add support for signed data

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- Use Buffer write functions
This commit is contained in:
Santiago Gimeno 2013-05-21 14:11:40 +02:00
parent 97eade2c49
commit e69f1b7475
1 changed files with 19 additions and 15 deletions
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32
lib/unpackbuffer.js
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@ -23,26 +23,30 @@ module.exports.addUnpack = function(Buffer)
var arg = format[current_arg]; var arg = format[current_arg];
switch (arg) { switch (arg) {
case 'C': case 'C':
data.push(this[offset++]); data.push(this.readUInt8(offset++));
break;
case 'c':
data.push(this.readInt8(offset++));
break; break;
case 'S': case 'S':
case 's': //TODO: 16bit signed unpack data.push(this.readUInt16LE(offset));
var b1 = this[offset++]; offset += 2;
var b2 = this[offset++]; break;
data.push(b2*256+b1); case 's':
data.push(this.readInt16LE(offset));
offset += 2;
break; break;
case 'n': case 'n':
var b1 = this[offset++]; data.push(this.readUInt16BE(offset));
var b2 = this[offset++]; offset += 2;
data.push(b1*256+b2);
break; break;
case 'L': case 'L':
case 'l': //TODO: 32bit signed unpack data.push(this.readUInt32LE(offset));
var b1 = this[offset++]; offset += 4;
var b2 = this[offset++]; break;
var b3 = this[offset++]; case 'l':
var b4 = this[offset++]; data.push(this.readInt32LE(offset));
data.push(((b4*256+b3)*256 + b2)*256 + b1); offset += 4;
break; break;
case 'x': case 'x':
offset++; offset++;