/**
* @brief increases production amount if possible
* @param[in,out] prod Pointer to the production
* @param[in] amount Additional amount to add
* @returns the amount added
*/
int PR_IncreaseProduction (production_t* prod, int amount)
{
if (PR_IsDisassembly(prod))
return 0;
base_t* base = PR_ProductionBase(prod);
assert(base);
/* amount limit per one production */
if (prod->amount + amount > MAX_PRODUCTION_AMOUNT) {
amount = std::max(0, MAX_PRODUCTION_AMOUNT - prod->amount);
}
const technology_t* tech = PR_GetTech(&prod->data);
assert(tech);
amount = PR_RequirementsMet(amount, &tech->requireForProduction, base);
if (amount == 0)
return 0;
prod->amount += amount;
PR_UpdateRequiredItemsInBasestorage(base, -amount, &tech->requireForProduction);
return amount;
}
/**
* @brief decreases production amount
* @param[in,out] prod Pointer to the production
* @param[in] amount Additional amount to remove (positive number)
* @returns the amount removed
* @note if production amount falls below 1 it removes the whole production from the queue as well
*/
int PR_DecreaseProduction (production_t* prod, int amount)
{
assert(prod);
base_t* base = PR_ProductionBase(prod);
assert(base);
if (PR_IsDisassembly(prod))
return 0;
if (prod->amount <= amount) {
production_queue_t* queue = PR_GetProductionForBase(base);
amount = prod->amount;
PR_QueueDelete(base, queue, prod->idx);
return amount;
}
const technology_t* tech = PR_GetTech(&prod->data);
if (tech == nullptr)
cgi->Com_Error(ERR_DROP, "No tech pointer for production");
prod->amount += -amount;
PR_UpdateRequiredItemsInBasestorage(base, amount, &tech->requireForProduction);
return amount;
}
/**
* @brief Calculates the remaining time for a technology in minutes
* @param[in] prod Pointer to the production structure
*/
int PR_GetRemainingMinutes (const production_t* prod)
{
assert(prod);
const base_t *base = PR_ProductionBase(prod);
return (prod->totalFrames - prod->frame) / std::max(1, PR_WorkersAvailable(base));
}