You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: metablock_command.go
    path of file: ./repos/scan4all/vendor/github.com/andybalholm/brotli
    
    the code of the file until where you have to start completion: package brotli

/* Copyright 2015 Google Inc. All Rights Reserved.

   Distributed under MIT license.
   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

/* Greedy block splitter for one block category (literal, command or distance).
 */
type blockSplitterCommand struct {
	alphabet_size_     uint
	min_block_size_    uint
	split_threshold_   float64
	num_blocks_        uint
	split_             *blockSplit
	histograms_        []histogramCommand
	histograms_size_   *uint
	target_block_size_ uint
	block_size_        uint
	curr_histogram_ix_ uint
	last_histogram_ix_ [2]uint
	last_entropy_      [2]float64
	merge_last_count_  uint
}

func initBlockSplitterCommand(self *blockSplitterCommand, alphabet_size uint, min_block_size uint, split_threshold float64, num_symbols uint, split *blockSplit, histograms *[]histogramCommand, histograms_size *uint) {
	var max_num_blocks uint = num_symbols/min_block_size + 1
	var max_num_types uint = brotli_min_size_t(max_num_blocks, maxNumber
    
func initBlockSplitterCommand(self *blockSplitterCommand, alphabet_size uint, min_block_size uint, split_threshold float64, num_symbols uint, split *blockSplit, histograms *[]histogramCommand, histograms_size *uint) {
	var max_num_blocks uint = num_symbols/min_block_size + 1
	var max_num_types uint = brotli_min_size_t(max_num_blocks, maxNumberOfBlockTypes+1)
	/* We have to allocate one more histogram than the maximum number of block
	   types for the current histogram when the meta-block is too big. */
	self.alphabet_size_ = alphabet_size

	self.min_block_size_ = min_block_size
	self.split_threshold_ = split_threshold
	self.num_blocks_ = 0
	self.split_ = split
	self.histograms_size_ = histograms_size
	self.target_block_size_ = min_block_size
	self.block_size_ = 0
	self.curr_histogram_ix_ = 0
	self.merge_last_count_ = 0
	brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, max_num_blocks)
	brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, max_num_blocks)
	self.split_.num_blocks = max_num_blocks
	*histograms_size = max_num_types
	if histograms == nil || cap(*histograms) < int(*histograms_size) {
		*histograms = make([]histogramCommand, (*histograms_size))
	} else {
		*histograms = (*histograms)[:*histograms_size]
	}
	self.histograms_ = *histograms

	/* Clear only current histogram. */
	histogramClearCommand(&self.histograms_[0])

	self.last_histogram_ix_[1] = 0
	self.last_histogram_ix_[0] = self.last_histogram_ix_[1]
}