/*
 * sysstat: System performance tools for Linux
 * (C) 1999-2016 by Sebastien Godard (sysstat <at> orange.fr)
 */

#ifndef _COMMON_H
#define _COMMON_H

/* Maximum length of sensors device name */
#define MAX_SENSORS_DEV_LEN	20

#include <time.h>
#include <sched.h>	/* For __CPU_SETSIZE */
#include <limits.h>

#ifdef HAVE_SYS_SYSMACROS_H
/* Needed on some non-glibc environments */
#include <sys/sysmacros.h>
#endif

#include "rd_stats.h"

/*
 ***************************************************************************
 * Various keywords and constants
 ***************************************************************************
 */

#define FALSE	0
#define TRUE	1

#define PLAIN_OUTPUT	0

#define DISP_HDR	1

/* Number of seconds per day */
#define SEC_PER_DAY	3600 * 24

/* Maximum number of CPUs */
#if defined(__CPU_SETSIZE) && __CPU_SETSIZE > 8192
#define NR_CPUS		__CPU_SETSIZE
#else
#define NR_CPUS		8192
#endif

/* Maximum number of interrupts */
#define NR_IRQS		1024

/* Size of /proc/interrupts line, CPU data excluded */
#define INTERRUPTS_LINE	128

/* Keywords */
#define K_ISO	"ISO"
#define K_ALL	"ALL"
#define K_UTC	"UTC"

/* Files */
#define STAT			"/proc/stat"
#define UPTIME			"/proc/uptime"
#define DISKSTATS		"/proc/diskstats"
#define INTERRUPTS		"/proc/interrupts"
#define MEMINFO			"/proc/meminfo"
#define SYSFS_BLOCK		"/sys/block"
#define SYSFS_DEV_BLOCK		"/sys/dev/block"
#define SYSFS_DEVCPU		"/sys/devices/system/cpu"
#define SYSFS_TIME_IN_STATE	"cpufreq/stats/time_in_state"
#define S_STAT			"stat"
#define DEVMAP_DIR		"/dev/mapper"
#define DEVICES			"/proc/devices"
#define SYSFS_USBDEV		"/sys/bus/usb/devices"
#define DEV_DISK_BY		"/dev/disk/by"
#define SYSFS_IDVENDOR		"idVendor"
#define SYSFS_IDPRODUCT		"idProduct"
#define SYSFS_BMAXPOWER		"bMaxPower"
#define SYSFS_MANUFACTURER	"manufacturer"
#define SYSFS_PRODUCT		"product"
#define SYSFS_FCHOST		"/sys/class/fc_host"

#define MAX_FILE_LEN		256
#define MAX_PF_NAME		1024
#define MAX_NAME_LEN		128

#define IGNORE_VIRTUAL_DEVICES	FALSE
#define ACCEPT_VIRTUAL_DEVICES	TRUE

/* Environment variables */
#define ENV_TIME_FMT		"S_TIME_FORMAT"
#define ENV_TIME_DEFTM		"S_TIME_DEF_TIME"
#define ENV_COLORS		"S_COLORS"
#define ENV_COLORS_SGR		"S_COLORS_SGR"

#define C_NEVER			"never"
#define C_ALWAYS		"always"

#define DIGITS			"0123456789"

/*
 ***************************************************************************
 * Macro functions definitions.
 ***************************************************************************
 */

/* Allocate and init structure */
#define SREALLOC(S, TYPE, SIZE)	do {								 \
   					TYPE *_p_;						 \
				   	_p_ = S;						 \
   				   	if (SIZE) {						 \
   				      		if ((S = (TYPE *) realloc(S, (SIZE))) == NULL) { \
				         		perror("realloc");			 \
				         		exit(4);				 \
				      		}						 \
				      		/* If the ptr was null, then it's a malloc() */	 \
						if (!_p_) {					 \
							memset(S, 0, (SIZE));			 \
						}						 \
				   	}							 \
					if (!S) {						 \
						/* Should never happen */			 \
						fprintf(stderr, "srealloc\n");		 	 \
						exit(4);					 \
					}							 \
				} while (0)

/*
 * Macros used to display statistics values.
 *
 * NB: Define SP_VALUE() to normalize to %;
 * HZ is 1024 on IA64 and % should be normalized to 100.
 * SP_VALUE_100() will not output value bigger than 100; this is needed for some
 * corner cases, should be used with care.
 */
#define S_VALUE(m,n,p)		(((double) ((n) - (m))) / (p) * HZ)
#define SP_VALUE(m,n,p)		(((double) ((n) - (m))) / (p) * 100)
#define SP_VALUE_100(m,n,p)	MINIMUM((((double) ((n) - (m))) / (p) * 100), 100.0)

/*
 * Under very special circumstances, STDOUT may become unavailable.
 * This is what we try to guess here.
 */
#define TEST_STDOUT(_fd_)	do {					\
					if (write(_fd_, "", 0) == -1) {	\
				        	perror("stdout");	\
				       		exit(6);		\
				 	}				\
				} while (0)

#define MINIMUM(a,b)	((a) < (b) ? (a) : (b))

#define PANIC(m)	sysstat_panic(__FUNCTION__, m)

/* Number of ticks per second */
#define HZ		hz
extern unsigned int hz;

/* Number of bit shifts to convert pages to kB */
extern unsigned int kb_shift;

/*
 * kB <-> number of pages.
 * Page size depends on machine architecture (4 kB, 8 kB, 16 kB, 64 kB...)
 */
#define KB_TO_PG(k)	((k) >> kb_shift)
#define PG_TO_KB(k)	((k) << kb_shift)

/* Type of persistent device names used in sar and iostat */
extern char persistent_name_type[MAX_FILE_LEN];

/*
 ***************************************************************************
 * Colors definitions
 ***************************************************************************
 */

#define C_LIGHT_RED	"\e[31;22m"
#define C_BOLD_RED	"\e[31;1m"
#define C_LIGHT_GREEN	"\e[32;22m"
#define C_LIGHT_YELLOW	"\e[33;22m"
#define C_BOLD_YELLOW	"\e[33;1m"
#define C_BOLD_BLUE	"\e[34;1m"
#define C_LIGHT_CYAN	"\e[36;22m"
#define C_NORMAL	"\e[0m"

#define PERCENT_LIMIT_HIGH	75.0
#define PERCENT_LIMIT_LOW	50.0

#define MAX_SGR_LEN	16

#define IS_INT		0
#define IS_STR		1
#define IS_RESTART	2
#define IS_COMMENT	3
#define IS_ZERO		4

/*
 ***************************************************************************
 * Structures definitions
 ***************************************************************************
 */

/* Structure used for extended disk statistics */
struct ext_disk_stats {
	double util;
	double await;
	double svctm;
	double arqsz;
};

/*
 ***************************************************************************
 * Functions prototypes
 ***************************************************************************
 */

void compute_ext_disk_stats
	(struct stats_disk *, struct stats_disk *, unsigned long long,
	 struct ext_disk_stats *);
int count_bits
	(void *, int);
int count_csvalues
	(int, char **);
void cprintf_f
	(int, int, int, ...);
void cprintf_in
	(int, char *, char *, int);
void cprintf_pc
	(int, int, int, ...);
void cprintf_s
	(int, char *, char *);
void cprintf_u64
	(int, int, ...);
void cprintf_x
	(int, int, ...);
char *device_name
	(char *);
void get_HZ
	(void);
unsigned int get_devmap_major
	(void);
unsigned long long get_interval
	(unsigned long long, unsigned long long);
void get_kb_shift
	(void);
time_t get_localtime
	(struct tm *, int);
time_t get_time
	(struct tm *, int);
unsigned long long get_per_cpu_interval
	(struct stats_cpu *, struct stats_cpu *);
char *get_persistent_name_from_pretty
	(char *);
char *get_persistent_type_dir
	(char *);
char *get_pretty_name_from_persistent
	(char *);
int get_sysfs_dev_nr
	(int);
int get_win_height
	(void);
void init_colors
	(void);
void init_nls
	(void);
int is_device
	(char *, int);
double ll_sp_value
	(unsigned long long, unsigned long long, unsigned long long);
int is_iso_time_fmt
	(void);
int print_gal_header
	(struct tm *, char *, char *, char *, char *, int, int);
void print_version
	(void);
char *strtolower
	(char *);
void sysstat_panic
	(const char *, int);
void xprintf
	(int, const char *, ...);
void xprintf0
	(int, const char *, ...);

#endif  /* _COMMON_H */