except.h

关于图的深度搜索的C语言代码实现

#ifndef EXCEPT_INCLUDED
        #define EXCEPT_INCLUDED
        #include <setjmp.h>
        #define T Except_T
        typedef struct T
        {
                char *reason;
        } T;
        typedef struct Except_Frame Except_Frame;
        struct Except_Frame
        {
                Except_Frame *prev;
                jmp_buf env;
                const char *file;
                int line;
                const T *exception;
        };
        enum
        {
                Except_entered = 0, Except_raised, Except_handled,
                        Except_finalized
        };
        #ifdef WIN32
                __declspec(thread)
        #endif

        extern Except_Frame *Except_stack;
        extern const Except_T Assert_Failed;
        void Except_raise(const T *e, const char *file, int line);
        #define RAISE(e) Except_raise(&(e), __FILE__, __LINE__)
        #define RERAISE Except_raise(Except_frame.exception, \
        Except_frame.file, Except_frame.line)
        #define RETURN switch (Except_stack = Except_stack->prev,0) default:	\
                return
        #define TRY do {							\
        volatile int Except_flag;						\
        Except_Frame Except_frame;						\
        Except_frame.prev = Except_stack;					\
        Except_stack = &Except_frame;						\
        Except_flag = setjmp(Except_frame.env);					\
        if (Except_flag == Except_entered) {


        #define EXCEPT(e)							\
        if (Except_flag == Except_entered) Except_stack = Except_stack->prev;	\
        } else if (Except_frame.exception == &(e)) {				\
        Except_flag = Except_handled;



        #define ELSE								\
        if (Except_flag == Except_entered) Except_stack = Except_stack->prev;	\
        } else {								\
        Except_flag = Except_handled;


        #define FINALLY								\
        if (Except_flag == Except_entered) Except_stack = Except_stack->prev;	\
        } {									\
        if (Except_flag == Except_entered)					\
        Except_flag = Except_finalized;


        #define END_TRY								\
        if (Except_flag == Except_entered) Except_stack = Except_stack->prev;	\
        } if (Except_flag == Except_raised) RERAISE;				\
        } while (0)

	#undef T
#endif