Full prototype:
_Noreturn void longjmp(jmp_buf, int);
Purpose and Notes:
Returns the execution of the code and restores the enviornment to that which is saved by the jmp_buf variable passed in as the first argument. It also sets the return value of the
setjmp call there to the second value passed in to the function or 1 if the second argument is null.
The function gives all control of the program from their to the
setjmp macro location and the code continues from there.
Essentially a way to jump around the code base other than function calls and goto statements and can be in non-local scope.
It should be noted that this function is absolutly HATED and despised by many a programmers for the spaghetti code it can cause as well as the mental overhead of being able to jump to different spots in the code all willy nilly.
Returns:
_Noreturn void- Doesn't return anything as the code will continue execution wherever the
setjmp it takes you to is from.
Argument 1:
jmp_buf- The saved state by a call to
set_jmp earlier in the code execution. The location and enviornment to go to.
Argument 2:
int- The value you want the destination
setjmp macro to return.