ERR_set_mark, ERR_pop_to_mark -- set marks and pop errors until mark
Synopsis
#include <openssl/err.h>
int ERR_set_mark(void);
int ERR_pop_to_mark(void);
DESCRIPTION
ERR_set_mark() sets a mark on the current topmost error record if
there is one.
ERR_pop_to_mark() will pop the top of the error stack until a mark is
found. The mark is then removed. If there is no mark, the whole
stack is removed.
RETURN VALUES
ERR_set_mark() returns 0 if the error stack is empty, otherwise 1.
ERR_pop_to_mark() returns 0 if there was no mark in the error stack,
which implies that the stack became empty, otherwise 1.
