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unreal2 / killing floor protocol cleanup surrounding ucs-2 encoding issues

This commit is contained in:
mmorrison 2019-10-26 07:31:28 -05:00
parent 68e115a64f
commit 265424adc8
1 changed files with 17 additions and 21 deletions
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38
protocols/unreal2.js
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@ -76,35 +76,27 @@ class Unreal2 extends Core {
readExtraInfo(reader,state) {
this.debugLog(log => {
log("UNREAL2 EXTRA INFO:");
log(reader.uint(4));
log(reader.uint(4));
log(reader.uint(4));
log(reader.uint(4));
log(reader.buffer.slice(reader.i));
log("UNREAL2 EXTRA INFO", reader.buffer.slice(reader.i));
});
}
readUnrealString(reader, stripColor) {
let length = reader.uint(1), ucs2 = false;
if(length >= 0x80) {
// This is flagged as a UCS-2 String
length = (length&0x7f)*2;
ucs2 = true;
// For UCS-2 strings, some unreal 2 games randomly insert an extra 0x01 here,
// not included in the length. Skip it if present (hopefully this never happens legitimately)
const peek = reader.uint(1);
if (peek !== 1) reader.skip(-1);
this.debugLog(log => {
log("UCS2 STRING");
log("UCS2 Length: " + length);
log(reader.buffer.slice(reader.i,reader.i+length));
});
ucs2 = true;
}
// Killing floor sometimes injects 8 bytes of junk here
if (reader.remaining() >= 8 && length >= 8) {
const peek = reader.part(2);
reader.skip(-2);
if (peek[0] === 0x1b && peek[1] === 0x01) {
reader.skip(8);
length -= 8;
}
}
let out = '';
@ -115,11 +107,15 @@ class Unreal2 extends Core {
out = reader.string();
}
if(out.charCodeAt(out.length-1) === 0)
out = out.substring(0,out.length-1);
// Sometimes the string has a null at the end (included with the length)
// Strip it if present
if(out.charCodeAt(out.length-1) === 0) {
out = out.substring(0, out.length - 1);
}
if(stripColor)
out = out.replace(/\x1b...|[\x00-\x1a]/g,'');
if(stripColor) {
out = out.replace(/\x1b...|[\x00-\x1a]/gus,'');
}
return out;
}