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except.h
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except.h
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#ifndef EXCEPT_INCLUDE
#define EXCEPT_INCLUDE
#include <setjmp.h>
#define T Except_T
typedef struct T
{
const 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
};
extern Except_Frame *Except_stack;
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 = &Execpt_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