#include <setjmp.h>

int setjmp(jmp_buf env)
{
	extern int __setjmp(jmp_buf);
	/*
	RETURN(0, the environment has been saved by THIS())
	RETURN(NONZERO, the environment has been restored by FUNCTION(longjmp))
	*/
	return __setjmp(env);
}

/** save program state **/

/***
saves the current state of the calling environment
in the TYPEDEF(jmp_buf) ARGUMENT(env).
***/

/* CONSTRAINT: entire controlling expression of a selection or iteration statement */
/* CONSTRAINT: one operand of a relational or equality operator which is the entire controlling expression of a selction or iteration statement */
/* CONSTRAINT: the operand of a unary ! as the entire controlling expression of a selection or iteration statement */
/* CONSTRAINT: an entire expression statement */

/*
UNSPECIFIED(Whether THIS() is a macro or identifier with external linkage)
UNDEFINED(A macro definition of THIS() is suppressed in order to access an actual function)
UNDEFINED(A program defines an external identifier named LITERAL(setjmp))
*/
/*
STDC(1)
*/