/*
   Copyright (c)  2014 IOnU Security Inc. All rights reserved
   Created April 2014 by Kendrick Webster
 
   K2Client/util.h - miscellaneous utility and low-level support functions
*/
#pragma once

#include "Hash.h"
#include "constants.h"

/* logging */
typedef enum
{
    LOG_FATAL,
    LOG_ERROR,
    LOG_WARNING,
    LOG_INFORMATIONAL,
    LOG_DEBUG,
    LOG_VERBOSE
}
log_level_t;
void initialize_logging(void);
void finalize_logging(void);
void set_log_level(log_level_t level); // ok to call at any time (w.r.t. initialize_logging et. al.)
void log_printf(log_level_t lev, const char* fmt, ...);
#define log_fatal(...)   log_printf(LOG_FATAL,         __VA_ARGS__)
#define log_error(...)   log_printf(LOG_ERROR,         __VA_ARGS__)
#define log_warn(...)    log_printf(LOG_WARNING,       __VA_ARGS__)
#define log_info(...)    log_printf(LOG_INFORMATIONAL, __VA_ARGS__)
#define log_debug(...)   log_printf(LOG_DEBUG,         __VA_ARGS__)
#define log_verbose(...) log_printf(LOG_VERBOSE,       __VA_ARGS__)


/* random number generator, thread safe and fast */
void seed_random(void); /* hash an entropy source (high-resolution clock, etc.) into the entropy pool */
void seed_random_with_bytes(void* buf, size_t len); /* hash a buffer into the RNG entropy pool */
unsigned int get_random(unsigned int modulus); /* returns number between 0 and (modulus - 1), note: slight bias (see implementation) */
void get_random_bytes(void* buf, size_t len); /* fills <len> bytes of <buf> with randomness */


/* misc */
#define TRUE 1
#define FALSE 0
int safe_strcpy(char* d, unsigned int n, const char* s); /* returns TRUE if string was truncated */