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/* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 2005 Net Integration Technologies, Inc.
*
* Helper classes and functions to add more information to WvCrashes.
*/
#ifndef __WVASSERT_H
#define __WVASSERT_H
#include <assert.h>
#include "wvcrash.h"
#include "wvstring.h"
// WvCrash allows you to print a programme's last will and testament.
// That is, a little note about what it was hoping to do before it
// died.
//
// This helper class lets you write a will, and when it gets
// destroyed, it will restore the old will from before. This lets you
// safely nest them.
class WvCrashWill
{
public:
// Leave a will behind.
WvCrashWill(const char *will);
WvCrashWill(WVSTRING_FORMAT_DECL);
// Restore the will that was there before you created this object.
~WvCrashWill();
// Rewrite the will you're leaving behind.
void rewrite(const char *will);
void rewrite(WVSTRING_FORMAT_DECL);
private:
WvString old_will;
};
#if !defined(__GLIBC__)
# define wvassert(expr, args...) assert(expr)
# define wvassert_perror(errnum) perror(errnum)
#elif defined(NDEBUG)
# define wvassert(expr, args...) (__ASSERT_VOID_CAST (0))
# define wvassert_perror(errnum) (__ASSERT_VOID_CAST (0))
#else // Not NDEBUG
static inline void __wvcrash_leave_will()
{
}
static inline void __wvcrash_leave_will(const char *will)
{
wvcrash_leave_will(will);
}
static inline void __wvcrash_leave_will(WVSTRING_FORMAT_DECL)
{
wvcrash_leave_will(WvFastString(WVSTRING_FORMAT_CALL));
}
// Use this function instead of assert(). You may also leave parameters
// at the end, which allow you to log messages. For instance:
//
// wvassert(a == b, "a: '%s'\n b: '%s'", a, b);
# define wvassert(expr, args...) \
(__ASSERT_VOID_CAST ((expr) ? 0 : \
(__wvcrash_leave_will (args), \
(__assert_fail (__STRING(expr), __FILE__, __LINE__, \
__ASSERT_FUNCTION), 0))))
// Use this function instead of assert_perror(). You may also leave
// parameters at the end, which allow you to log messages. For instance:
//
// wvassert(errno, "Error trying to read file: '%s'", filename);
# define wvassert_perror(errnum, args...) \
(__ASSERT_VOID_CAST (!(errnum) ? 0 : \
(__wvcrash_leave_will (args), \
(__assert_perror_fail ((errnum), __FILE__, __LINE__, \
__ASSERT_FUNCTION), 0))))
#endif // NDEBUG
#endif // WVASSERT_H
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