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#if 0
#include <setjmp.h>
#include <string.h>
/** save program state **/
int setjmp(jmp_buf env)
{
extern int __setjmp(jmp_buf);
memset(env, 0, sizeof(jmp_buf));
return __setjmp(env);
}
/***
saves the current state of the calling environment
in the TYPEDEF(jmp_buf) ARGUMENT(env).
***/
/*
RETURN(0, the environment has been saved by THIS())
RETURN(NONZERO, the environment has been restored by FUNCTION(longjmp))
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)
*/
#endif
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