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DIRECTOR: Comments for bytecode argument parser

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This commit is contained in:
Scott Percival
2019-12-02 21:57:10 +08:00
parent f1b0c10fe4
commit 237a5f97a8
1 changed files with 7 additions and 2 deletions
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engines/director/lingo/lingo-bytecode.cpp
+7 -2
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@@ -495,26 +495,31 @@ void Lingo::addCodeV4(Common::SeekableSubReadStreamEndian &stream, ScriptType ty
for (uint c = 0; c < argc; c++) {
switch (_lingoV4[opcode]->proto[c]) {
case 'b':
// read one uint8 as an argument
offsetList.push_back(_currentScript->size());
arg = (int8)codeStore[pointer];
arg = (uint8)codeStore[pointer];
pointer += 1;
break;
case 'w':
// read one uint16 as an argument
offsetList.push_back(_currentScript->size());
offsetList.push_back(_currentScript->size());
arg = (int16)READ_BE_UINT16(&codeStore[pointer]);
arg = (uint16)READ_BE_UINT16(&codeStore[pointer]);
pointer += 2;
break;
case 'v':
// argument refers to a variable; remove struct size alignment
if (arg % 6) {
warning("Opcode 0x%02x arg %d not a multiple of 6!", opcode, arg);
}
arg /= 6;
break;
case 'n':
// argument is negative
arg *= -1;
break;
case 'j':
// argument refers to a code offset; fix alignment in post
jumpList.push_back(offsetList.size());
break;
default: