Function modifyfvar

source/src/command.cpp:1380–1415

void diveq(char *name, int *arg) { modifyvar(name, *arg, '/'); }    COMMANDN(div=, diveq, "si");

void modifyfvar(const char *name, float arg, char op)
{
    ident *id = idents->access(name);
    if(!id) return;
    if(identaccessdenied(id))
    {
        conoutf("not allowed in this execution context: %s", id->name);
        scripterr();
        return;
    }
    if((id->type == ID_VAR && id->minval > id->maxval) || (id->type == ID_FVAR && id->minvalf > id->maxvalf)) { conoutf("variable %s is read-only", id->name); return; }
    float val = 0;
    switch(id->type)
    {
        case ID_VAR: val = *id->storage.i; break;
        case ID_FVAR: val = *id->storage.f; break;
        case ID_SVAR: { { if(id->getfun) ((void (__cdecl *)())id->getfun)(); } val = atof(*id->storage.s); break; }
        case ID_ALIAS: val = atof(id->action); break;
        default: return;
    }
    switch(op)
    {
        case '+': val += arg; break;
        case '-': val -= arg; break;
        case '*': val *= arg; break;
        case '/': val = (arg == 0.0f) ? 0 : val / arg; break;
    }
    switch(id->type)
    {
        case ID_VAR: *id->storage.i = clamp((int)val, id->minval, id->maxval); break;
        case ID_FVAR: *id->storage.f = clamp(val, id->minvalf, id->maxvalf); break;
        case ID_SVAR: *id->storage.s = exchangestr(*id->storage.s, floatstr(val)); break;
        case ID_ALIAS: alias(name, floatstr(val)); return;
    }
    if(id->fun) ((void (__cdecl *)())id->fun)();
}

void addeqf(char *name, float *arg) { modifyfvar(name, *arg, '+'); }    COMMANDN(+=f, addeqf, "sf");
void subeqf(char *name, float *arg) { modifyfvar(name, *arg, '-'); }    COMMANDN(-=f, subeqf, "sf");