replicate.qh

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#pragma once
 
#if defined(CSQC)
const int REPLICATEVARS_SEND_ALL = -1; // sync all cvars with the server (init)
const int REPLICATEVARS_CHECK = 0; // check if any cvar has changed and sync it with the server
const int REPLICATEVARS_DESTROY = 1; // destroy data associated with cvars (shutdown)
#define REPLICATE_INIT(type, name) type name
#elif defined(SVQC)
#define REPLICATE_INIT(type, name) .type name
#endif
 
#ifdef GAMEQC

    #define REPLICATE(...) EVAL_REPLICATE(OVERLOAD(REPLICATE, __VA_ARGS__))
    #define EVAL_REPLICATE(...) __VA_ARGS__
 
    #if defined(SVQC)
    ACCUMULATE void ReplicateVars(entity this, entity store, string thisname, int i) {}
    ACCUMULATE void ReplicateVars_ApplyChange(entity this, entity store, string thisname, int i) {}
    #define REPLICATE_APPLYCHANGE(var, ApplyChange_code) \
        void ReplicateVars_ApplyChange(entity this, entity store, string thisname, int i) \
            { if (thisname == var) { ApplyChange_code } }
    #elif defined(CSQC)
    noref float ReplicateVars_time;
    ACCUMULATE void ReplicateVars(int mode)
    {
        if (!ReplicateVars_time || time < ReplicateVars_time)
            return;
        ReplicateVars_time = time + 0.8 + random() * 0.4; // check cvars periodically
    }
    void ReplicateVars_Start()
    {
        if (!ReplicateVars_time) // make sure it gets executed only once
        {
            ReplicateVars_time = time;
            ReplicateVars(REPLICATEVARS_SEND_ALL);
        }
    }
    #endif
 
    #define REPLICATE_3(fld, type, var) REPLICATE_4(fld, type, var, )
    #define REPLICATE_4(fld, type, var, func) REPLICATE_##type(fld, var, func)
    #if defined(SVQC)
        #define REPLICATE_string(fld, var, func) \
            REPLICATE_7(fld, string, var, , \
        { strcpy(field, it); }, \
        { strfree(field); }, \
        { \
            /* also initialize to the default value of func when requesting cvars */ \
            string s = func(this, strcat(field)); \
            if (s != field) \
            { \
                strcpy(field, s); \
            } \
        })
        #define REPLICATE_vector(fld, var, func) REPLICATE_7(fld, vector, var, func, { field = stov(it); },          , )
        #define REPLICATE_float(fld, var, func) REPLICATE_7(fld, float, var, func,  { field = stof(it); },          , )
        #define REPLICATE_bool(fld, var, func) REPLICATE_7(fld, bool, var, func,   { field = boolean(stoi(it)); }, , )
        #define REPLICATE_int(fld, var, func) REPLICATE_7(fld, int, var, func,    { field = stoi(it); },          , )
 
        #define REPLICATE_7(fld, type, var, func, create, destroy, after) \
            void ReplicateVars(entity this, entity store, string thisname, int i) \
            { \
                type field = store.fld; \
                if (i < 0) { destroy } \
                else \
                { \
                    string it = func(argv(i + 1)); \
                    bool current = thisname == var; \
                    if (i > 0) \
                    { \
                        if (current) { create } \
                    } \
                    else \
                    { \
                        stuffcmd(this, strcat("cl_cmd sendcvar ", var, "\n")); \
                    } \
                    if (current) { after } \
                } \
                store.fld = field; \
            }
    #elif defined(CSQC)
        #define REPLICATE_vector(fld, var, func) REPLICATE_7(fld, vector, var, func, (fld != stov(cvar_string(var))), { fld = stov(cvar_string(var)); }, )
        #define REPLICATE_string(fld, var, func) REPLICATE_7(fld, float, var, func, (fld != cvar_string(var)), { strcpy(fld, cvar_string(var)); }, { strfree(fld); })
        #define REPLICATE_float(fld, var, func) REPLICATE_7(fld, float, var, func, (fld != cvar(var)), { fld = cvar(var); }, )
        #define REPLICATE_bool(fld, var, func) REPLICATE_7(fld, bool, var, func, (fld != cvar(var)), { fld = cvar(var); }, )
        #define REPLICATE_int(fld, var, func) REPLICATE_7(fld, int, var, func, (fld != cvar(var)), { fld = cvar(var); }, )
 
        void ReplicateVars_Send(string cvarname) { localcmd(strcat("cl_cmd sendcvar ", cvarname, "\n")); }
 
        #define REPLICATE_7(fld, type, var, func, check, update, destroy) \
            void ReplicateVars(int mode) \
            { \
                if (mode == REPLICATEVARS_DESTROY) { destroy } \
                else if (mode == REPLICATEVARS_SEND_ALL || check) \
                { \
                    ReplicateVars_Send(var); \
                    update \
                } \
            }
 
        #define REPLICATE_SIMPLE(field, cvarname) MACRO_BEGIN \
            float thecvar = cvar(cvarname); \
            if(field != thecvar) \
            { \
                ReplicateVars_Send(cvarname); \
                field = thecvar; \
            } \
        MACRO_END
    #endif
 
#endif