/* egprs_rlc_compression.h
 *  Routines for EGPRS RLC bitmap compression handling
 */
#include <gprs_rlcmac.h>
#include <gprs_debug.h>

extern "C" {
#include <osmocom/core/talloc.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/stats.h>
}

#include <arpa/inet.h>
#include <errno.h>
#include <string.h>

#define	MAX_CDWDTBL_LEN          79        /* total number of codewords */
#define	BITS_TO_BYTES(X)      ((X ? (X/8):0)+1)
#define	MOD8(X)             (((X)+8) & (0x07))

typedef struct node {
	struct node *left;
	struct node *right;
	uint16_t *run_length;
} Node;

extern const char *one_run_len_code_list[MAX_CDWDTBL_LEN];
extern const char *zero_run_len_code_list[MAX_CDWDTBL_LEN];

/* Creating singleton class
 */
class egprs_compress
{
	static egprs_compress *s_instance;

	egprs_compress()
	{
		ones_list = (Node *)malloc(sizeof(Node));
		zeros_list = (Node *)malloc(sizeof(Node));
	}
	void build_codeword(Node *root, const char *cdwd[]);
public:
	static Node *ones_list;
	static Node *zeros_list;

	void decode_tree_init(void)
	{
		instance()->build_codeword(
			ones_list, one_run_len_code_list);
		instance()->build_codeword(
			zeros_list, zero_run_len_code_list);
	}
	static egprs_compress *instance()
	{
		if (!s_instance)
			s_instance = new egprs_compress;

		return s_instance;
	}
};