functpointer.cpp

inline bool FixupArgument(char fixup, ScriptOperation& codeOp, int argIndex, ccInstance* codeInst, ccInstance& c_this, int pc_at) {
    using FixupFunc = std::function<bool(ScriptOperation&, int, ccInstance*, ccInstance&, int)>;

    // #define FIXUP_GLOBALDATA  1     // code[fixup] += &globaldata[0]
    // #define FIXUP_FUNCTION    2     // code[fixup] += &code[0]
    // #define FIXUP_STRING      3     // code[fixup] += &strings[0]
    // #define FIXUP_IMPORT      4     // code[fixup] = &imported_thing[code[fixup]]
    // #define FIXUP_DATADATA    5     // globaldata[fixup] += &globaldata[0]
    // #define FIXUP_STACK       6     // code[fixup] += &stack[0]

    static const std::array<FixupFunc, 7> fixupFuncs{ {
        [](ScriptOperation&, int, ccInstance*, ccInstance&, int) { return false; }, // Placeholder for index 0
        [](ScriptOperation& op, int idx, ccInstance* inst, ccInstance&, int pc) { // FIXUP_GLOBALDATA
            ScriptVariable* gl_var = (ScriptVariable*)inst->code[pc];
            op.Args[idx].SetGlobalVar(&gl_var->RValue);
            return false;
        },
        [](ScriptOperation& op, int idx, ccInstance* inst, ccInstance&, int pc) { // FIXUP_FUNCTION
            op.Args[idx].SetInt32((int32_t)inst->code[pc]);
            return false;
        },
        [](ScriptOperation& op, int idx, ccInstance* inst, ccInstance&, int pc) { // FIXUP_STRING
            op.Args[idx].SetStringLiteral(&inst->strings[0] + inst->code[pc]);
            return false;
        },
        [](ScriptOperation& op, int idx, ccInstance* inst, ccInstance&, int pc) { // FIXUP_IMPORT
            const ScriptImport* import = simp.getByIndex(static_cast<uint32_t>(inst->code[pc]));
            if (import) {
                op.Args[idx] = import->Value;
            } else {
              cc_error("cannot resolve import, key = %ld", inst->code[pc]);
              return true;
            }
            return false;
            },
        [](ScriptOperation&, int, ccInstance*, ccInstance&, int) { return false; }, // Placeholder for FIXUP_DATADATA
        [](ScriptOperation& op, int idx, ccInstance* inst, ccInstance& c_this, int pc) { // FIXUP_STACK
            op.Args[idx] = c_this.GetStackPtrOffsetFw((int32_t)inst->code[pc]); 
            return false;
        }
} };

    if (fixup < fixupFuncs.size()) {
        return fixupFuncs[fixup](codeOp, argIndex, codeInst, c_this, pc_at);
    }
    else {
        cc_error("internal fixup type error: %d", fixup);
        return true;
    }
}