utypes.h

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/*===========================================================================*/
/* UClassID-based RTTI */
/*===========================================================================*/

/**
 * UClassID is used to identify classes without using RTTI, since RTTI
 * is not yet supported by all C++ compilers.  Each class hierarchy which needs
 * to implement polymorphic clone() or operator==() defines two methods,
 * described in detail below.  UClassID values can be compared using
 * operator==(). Nothing else should be done with them.
 *
 * \par
 * getDynamicClassID() is declared in the base class of the hierarchy as
 * a pure virtual.  Each concrete subclass implements it in the same way:
 *
 * \code
 *      class Base {
 *      public:
 *          virtual UClassID getDynamicClassID() const = 0;
 *      }
 *
 *      class Derived {
 *      public:
 *          virtual UClassID getDynamicClassID() const
 *            { return Derived::getStaticClassID(); }
 *      }
 * \endcode
 *
 * Each concrete class implements getStaticClassID() as well, which allows
 * clients to test for a specific type.
 *
 * \code
 *      class Derived {
 *      public:
 *          static UClassID U_EXPORT2 getStaticClassID();
 *      private:
 *          static char fgClassID;
 *      }
 *
 *      // In Derived.cpp:
 *      UClassID Derived::getStaticClassID()
 *        { return (UClassID)&Derived::fgClassID; }
 *      char Derived::fgClassID = 0; // Value is irrelevant
 * \endcode
 * @stable ICU 2.0
 */
typedef void* UClassID;

/*===========================================================================*/
/* Shared library/DLL import-export API control                              */
/*===========================================================================*/

/*
 * Control of symbol import/export.
 * ICU is separated into three libraries.
 */

/*
 * \def U_COMBINED_IMPLEMENTATION
 * Set to export library symbols from inside the ICU library
 * when all of ICU is in a single library.
 * This can be set as a compiler option while building ICU, and it
 * needs to be the first one tested to override U_COMMON_API, U_I18N_API, etc.
 * @stable ICU 2.0
 */

/**
 * \def U_DATA_API
 * Set to export library symbols from inside the stubdata library,
 * and to import them from outside.
 * @draft ICU 3.0
 */

/**
 * \def U_COMMON_API
 * Set to export library symbols from inside the common library,
 * and to import them from outside.
 * @stable ICU 2.0
 */

/**
 * \def U_I18N_API
 * Set to export library symbols from inside the i18n library,
 * and to import them from outside.
 * @stable ICU 2.0
 */

/**
 * \def U_LAYOUT_API
 * Set to export library symbols from inside the layout engine library,
 * and to import them from outside.
 * @stable ICU 2.0
 */

/**
 * \def U_LAYOUTEX_API
 * Set to export library symbols from inside the layout extensions library,
 * and to import them from outside.
 * @stable ICU 2.6
 */

/**
 * \def U_IO_API
 * Set to export library symbols from inside the ustdio library,
 * and to import them from outside.
 * @stable ICU 2.0
 */

#if defined(U_COMBINED_IMPLEMENTATION)
#define U_DATA_API     U_EXPORT
#define U_COMMON_API   U_EXPORT
#define U_I18N_API     U_EXPORT
#define U_LAYOUT_API   U_EXPORT
#define U_LAYOUTEX_API U_EXPORT
#define U_IO_API       U_EXPORT
#elif defined(U_STATIC_IMPLEMENTATION)
#define U_DATA_API
#define U_COMMON_API
#define U_I18N_API
#define U_LAYOUT_API
#define U_LAYOUTEX_API
#define U_IO_API
#elif defined(U_COMMON_IMPLEMENTATION)
#define U_DATA_API     U_IMPORT
#define U_COMMON_API   U_EXPORT
#define U_I18N_API     U_IMPORT
#define U_LAYOUT_API   U_IMPORT
#define U_LAYOUTEX_API U_IMPORT
#define U_IO_API       U_IMPORT
#elif defined(U_I18N_IMPLEMENTATION)
#define U_DATA_API     U_IMPORT
#define U_COMMON_API   U_IMPORT
#define U_I18N_API     U_EXPORT
#define U_LAYOUT_API   U_IMPORT
#define U_LAYOUTEX_API U_IMPORT
#define U_IO_API       U_IMPORT
#elif defined(U_LAYOUT_IMPLEMENTATION)
#define U_DATA_API     U_IMPORT
#define U_COMMON_API   U_IMPORT
#define U_I18N_API     U_IMPORT
#define U_LAYOUT_API   U_EXPORT
#define U_LAYOUTEX_API U_IMPORT
#define U_IO_API       U_IMPORT
#elif defined(U_LAYOUTEX_IMPLEMENTATION)
#define U_DATA_API     U_IMPORT
#define U_COMMON_API   U_IMPORT
#define U_I18N_API     U_IMPORT
#define U_LAYOUT_API   U_IMPORT
#define U_LAYOUTEX_API U_EXPORT
#define U_IO_API       U_IMPORT
#elif defined(U_IO_IMPLEMENTATION)
#define U_DATA_API     U_IMPORT
#define U_COMMON_API   U_IMPORT
#define U_I18N_API     U_IMPORT
#define U_LAYOUT_API   U_IMPORT
#define U_LAYOUTEX_API U_IMPORT
#define U_IO_API       U_EXPORT
#else
#define U_DATA_API     U_IMPORT
#define U_COMMON_API   U_IMPORT
#define U_I18N_API     U_IMPORT
#define U_LAYOUT_API   U_IMPORT
#define U_LAYOUTEX_API U_IMPORT
#define U_IO_API       U_IMPORT
#endif

/**
 * \def U_STANDARD_CPP_NAMESPACE
 * Control of C++ Namespace
 * @stable ICU 2.0
 */
#ifdef __cplusplus
#define U_STANDARD_CPP_NAMESPACE        ::
#else
#define U_STANDARD_CPP_NAMESPACE
#endif


/*===========================================================================*/
/* Global delete operator                                                    */
/*===========================================================================*/

/*
 * The ICU4C library must not use the global new and delete operators.
 * These operators here are defined to enable testing for this.
 * See Jitterbug 2581 for details of why this is necessary.
 *
 * Verification that ICU4C's memory usage is correct, i.e.,
 * that global new/delete are not used:
 *
 * a) Check for imports of global new/delete (see uobject.cpp for details)
 * b) Verify that new is never imported.
 * c) Verify that delete is only imported from object code for interface/mixin classes.
 * d) Add global delete and delete[] only for the ICU4C library itself
 *    and define them in a way that crashes or otherwise easily shows a problem.
 *
 * The following implements d).
 * The operator implementations crash; this is intentional and used for library debugging.
 *
 * Note: This is currently only done on Windows because
 * some Linux/Unix compilers have problems with defining global new/delete.
 * On Windows, WIN32 is defined, and it is _MSC_Ver>=1200 for MSVC 6.0 and higher.
 */
#if defined(XP_CPLUSPLUS) && defined(WIN32) && (_MSC_Ver>=1200) && (defined(U_COMMON_IMPLEMENTATION) || defined(U_I18N_IMPLEMENTATION) || defined(U_LAYOUT_IMPLEMENTATION) || defined(U_USTDIO_IMPLEMENTATION))

/**
 * Global operator new, defined only inside ICU4C, must not be used.
 * Crashes intentionally.
 * @internal
 */
inline void *
operator new(size_t /*size*/) {
    char *q=NULL;
    *q=5; /* break it */
    return q;
}

/**
 * Global operator new[], defined only inside ICU4C, must not be used.
 * Crashes intentionally.
 * @internal
 */
inline void *
operator new[](size_t /*size*/) {
    char *q=NULL;
    *q=5; /* break it */
    return q;
}

/**
 * Global operator delete, defined only inside ICU4C, must not be used.
 * Crashes intentionally.
 * @internal
 */
inline void
operator delete(void * /*p*/) {
    char *q=NULL;
    *q=5; /* break it */
}

/**
 * Global operator delete[], defined only inside ICU4C, must not be used.
 * Crashes intentionally.
 * @internal
 */
inline void
operator delete[](void * /*p*/) {
    char *q=NULL;