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All these message functions use printf formatting.

int gl_output(char *msg, ...) 
Send a message to the normal output stream.
int gl_warning(char *msg, ...) 
Send a message to the warning output stream.
int gl_error(char *msg, ...) 
Send a message to the error output stream.
int gl_debug(char *msg, ...) 
Send a message to the debug output stream.
int gl_verbose(char *msg, ...) 
Send a message to the verbose output stream.
int gl_testmsg(char *msg, ...) 
Send a message to the test output stream.

Property formatting

char *gl_name(object obj) 
Construct a string containing a name for the object.
char *gl_strftime(timestamp ts) 
Convert a timestamp to a string using a static buffer.

Property access

char *gl_global_getvar(char *name) 
Get the string value of a global variable.
gl_get_value(object obj, char *name, T &value) 
Get the value of a property of type T.
void *gl_get_addr(object obj, char *name) 
Get a pointer to the property of an object.
FUNCTIONADDR gl_get_function(CLASS *oclass, char *fname) 
Get a pointer to a class function.
int gl_set_parent(OBJECT *obj, OBJECT *parent) 
Set the parent of an object.

Exception handling

void gl_throw(char *msg, ...) 
Throw an exception with a printf style message (which stops the simulation)

Random numbers

gl_random_D(double a, ...) 
Get a random number of distribution D.


timestamp gl_globalclock 
Get the value of the simulation's global clock.
DATETIME *gl_localtime(timestamp ts, DATETIME *dt) 
Convert a timestamp to date/time structure.
timestamp gl_timestamp(double t) 
Convert a double (in seconds from 1/1/1970) to a timestamp.
double gl_seconds(timestamp ts) 
Convert a timestamp into seconds (from 1/1/1970).
double gl_minutes(timestamp ts) 
Convert a timestamp into minutes (from 1/1/1970).
double gl_hours(timestamp ts) 
Convert a timestamp into hours (from 1/1/1970).
double gl_days(timestamp ts) 
Convert a timestamp into days (from 1/1/1970).
double gl_weeks(timestamp ts) 
Convert a timestamp into weeks (from 1/1/1970).



typedef struct {
	char name[1024];	// name of module
	CLASS *oclass;		// list of classes implemented by module
	unsigned short major;	// major version number
	unsigned short minor;	// minor version number
	PROPERTY *globals;	// list of globals used by module


typedef struct {
	char name[64];	// class name
	MODULE *module;	// module that implement the class
	PROPERTY *pmap;	// list of properties
	FUNCTION *fmap;	// list of functions
	CLASS *parent;	// class parent
	CLASS *next;	// next class in list


typedef struct {
	unsigned int id;	// id (unique)
	CLASS *oclass;	// class
	object next;	// next object in list
	object parent;	// parent
	unsigned int rank;	// rank
	timestamp clock;	// clock
	double latitude, longitude; // geocoordinates
	timestamp in_svc, out_svc;	// service times
	char *name; // name of object


typedef struct {
	char name[64];	// name
	long ptype;	// type (see PT_* enum, e.g., PT_bool)
	unsigned long size;	// array size
	long access;	// access flags (see PA_* enum, e.g., PA_PUBLIC)
	UNIT *unit;	// units if any, or NULL
	void *addr;	// property location (header offset for objects, address for globals) */
	KEYWORD *keywords;	// list of valid keywords
	struct s_property_map *next;	// next property in property list 
	PROPERTYFLAGS flags;	// property flags (e.g., PF_RECALC) 


This structure defines a function published by a class.

typedef struct {
	char name[64];	// name of function
	int64 (*addr)(void*, ...);	// entry of function
	FUNCTION *next;	// next function in list 


typedef struct {
	char name[64];	// name of unit
	double c,e,h,k,m,s,a,b;	// unit parameters
	int prec;	// precision of unit
	struct s_unit *next;	// the next unit is the unit list