excpt.h

C标准库源代码

/***
*excpt.h - defines exception values, types and routines
*
*       Copyright (c) 1990-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       This file contains the definitions and prototypes for the compiler-
*       dependent intrinsics, support functions and keywords which implement
*       the structured exception handling extensions.
*
*       [Public]
*
****/

#if _MSC_VER > 1000
#pragma once
#endif  /* _MSC_VER > 1000 */

#ifndef _INC_EXCPT
#define _INC_EXCPT

#if !defined (_WIN32) && !defined (_MAC)
#error ERROR: Only Mac or Win32 targets supported!
#endif  /* !defined (_WIN32) && !defined (_MAC) */

#ifndef _CRTBLD
/* This version of the header files is NOT for user programs.
 * It is intended for use when building the C runtimes ONLY.
 * The version intended for public use will not have this message.
 */
#error ERROR: Use of C runtime library internal header file.
#endif  /* _CRTBLD */

#ifdef _MSC_VER
/*
 * Currently, all MS C compilers for Win32 platforms default to 8 byte
 * alignment.
 */
#pragma pack(push,8)
#endif  /* _MSC_VER */

#ifdef __cplusplus
extern "C" {
#endif  /* __cplusplus */

#ifndef _INTERNAL_IFSTRIP_
#include <cruntime.h>
#endif  /* _INTERNAL_IFSTRIP_ */


/* Define _CRTIMP */

#ifndef _CRTIMP
#ifdef CRTDLL
#define _CRTIMP __declspec(dllexport)
#else  /* CRTDLL */
#ifdef _DLL
#define _CRTIMP __declspec(dllimport)
#else  /* _DLL */
#define _CRTIMP
#endif  /* _DLL */
#endif  /* CRTDLL */
#endif  /* _CRTIMP */


/* Define __cdecl for non-Microsoft compilers */

#if (!defined (_MSC_VER) && !defined (__cdecl))
#define __cdecl
#endif  /* (!defined (_MSC_VER) && !defined (__cdecl)) */

/* Define _CRTAPI1 (for compatibility with the NT SDK) */

#ifndef _CRTAPI1
#if _MSC_VER >= 800 && _M_IX86 >= 300
#define _CRTAPI1 __cdecl
#else  /* _MSC_VER >= 800 && _M_IX86 >= 300 */
#define _CRTAPI1
#endif  /* _MSC_VER >= 800 && _M_IX86 >= 300 */
#endif  /* _CRTAPI1 */


/*
 * Exception disposition return values.
 */
typedef enum _EXCEPTION_DISPOSITION {
    ExceptionContinueExecution,
    ExceptionContinueSearch,
    ExceptionNestedException,
    ExceptionCollidedUnwind
} EXCEPTION_DISPOSITION;


/*
 * Prototype for SEH support function.
 */

#ifdef _M_IX86

/*
 * Declarations to keep MS C 8 (386/486) compiler happy
 */
struct _EXCEPTION_RECORD;
struct _CONTEXT;

EXCEPTION_DISPOSITION __cdecl _except_handler (
    struct _EXCEPTION_RECORD *ExceptionRecord,
    void * EstablisherFrame,
    struct _CONTEXT *ContextRecord,
    void * DispatcherContext
    );

#elif defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC)

/*
 * Declarations to keep MIPS, ALPHA, and PPC compiler happy
 */
typedef struct _EXCEPTION_POINTERS *Exception_info_ptr;
struct _EXCEPTION_RECORD;
struct _CONTEXT;
struct _DISPATCHER_CONTEXT;


_CRTIMP EXCEPTION_DISPOSITION __C_specific_handler (
    struct _EXCEPTION_RECORD *ExceptionRecord,
    void *EstablisherFrame,
    struct _CONTEXT *ContextRecord,
    struct _DISPATCHER_CONTEXT *DispatcherContext
    );

#endif  /* defined (_M_MRX000) || defined (_M_ALPHA) || defined (_M_PPC) */


/*
 * Keywords and intrinsics for SEH
 */

#ifdef _MSC_VER

#define GetExceptionCode            _exception_code
#define exception_code              _exception_code
#define GetExceptionInformation     (struct _EXCEPTION_POINTERS *)_exception_info
#define exception_info              (struct _EXCEPTION_POINTERS *)_exception_info
#define AbnormalTermination         _abnormal_termination
#define abnormal_termination        _abnormal_termination

unsigned long __cdecl _exception_code(void);
void *        __cdecl _exception_info(void);
int           __cdecl _abnormal_termination(void);

#endif  /* _MSC_VER */


/*
 * Legal values for expression in except().
 */

#define EXCEPTION_EXECUTE_HANDLER       1
#define EXCEPTION_CONTINUE_SEARCH       0
#define EXCEPTION_CONTINUE_EXECUTION    -1


#ifndef _INTERNAL_IFSTRIP_
/*
 * for convenience, define a type name for a pointer to signal-handler
 */

typedef void (__cdecl * _PHNDLR)(int);

/*
 * Exception-action table used by the C runtime to identify and dispose of
 * exceptions corresponding to C runtime errors or C signals.
 */
struct _XCPT_ACTION {

    /*
     * exception code or number. defined by the host OS.
     */
    unsigned long XcptNum;

    /*
     * signal code or number. defined by the C runtime.
     */
    int SigNum;

    /*
     * exception action code. either a special code or the address of
     * a handler function. always determines how the exception filter
     * should dispose of the exception.
     */
    _PHNDLR XcptAction;
};

extern struct _XCPT_ACTION _XcptActTab[];

/*
 * number of entries in the exception-action table
 */
extern int _XcptActTabCount;

/*
 * size of exception-action table (in bytes)
 */
extern int _XcptActTabSize;

/*
 * index of the first floating point exception entry
 */
extern int _First_FPE_Indx;

/*
 * number of FPE entries
 */
extern int _Num_FPE;

/*
 * return values and prototype for the exception filter function used in the
 * C startup
 */
int __cdecl _XcptFilter(unsigned long, struct _EXCEPTION_POINTERS *);

#endif  /* _INTERNAL_IFSTRIP_ */

#ifdef __cplusplus
}
#endif  /* __cplusplus */

#ifdef _MSC_VER
#pragma pack(pop)
#endif  /* _MSC_VER */

#endif  /* _INC_EXCPT */