Method mergeStacks

common/buildcraft/lib/misc/StackUtil.java:119–131

Merges mergeSource into mergeTarget @param mergeSource - The stack to merge into mergeTarget, this stack is not modified @param mergeTarget - The target merge, this stack is modified if doMerge is set @param doMerge - To actually do the merge @return The number of items that was successfully merged

(ItemStack mergeSource, ItemStack mergeTarget, boolean doMerge)

     * @param doMerge - To actually do the merge
     * @return The number of items that was successfully merged. */
    public static int mergeStacks(ItemStack mergeSource, ItemStack mergeTarget, boolean doMerge) {
        if (!canMerge(mergeSource, mergeTarget)) {
            return 0;
        }
        int mergeCount = Math.min(mergeTarget.getMaxStackSize() - mergeTarget.stackSize, mergeSource.stackSize);
        if (mergeCount < 1) {
            return 0;
        }
        if (doMerge) {
            mergeTarget.stackSize += mergeCount;
        }
        return mergeCount;
    }

    /* ITEM COMPARISONS */
    /** Determines whether the given ItemStack should be considered equivalent for crafting purposes.