michael@0: /* internal.h
michael@0: 
michael@0:    Internal definitions used by Expat.  This is not needed to compile
michael@0:    client code.
michael@0: 
michael@0:    The following calling convention macros are defined for frequently
michael@0:    called functions:
michael@0: 
michael@0:    FASTCALL    - Used for those internal functions that have a simple
michael@0:                  body and a low number of arguments and local variables.
michael@0: 
michael@0:    PTRCALL     - Used for functions called though function pointers.
michael@0: 
michael@0:    PTRFASTCALL - Like PTRCALL, but for low number of arguments.
michael@0: 
michael@0:    inline      - Used for selected internal functions for which inlining
michael@0:                  may improve performance on some platforms.
michael@0: 
michael@0:    Note: Use of these macros is based on judgment, not hard rules,
michael@0:          and therefore subject to change.
michael@0: */
michael@0: 
michael@0: #if defined(__GNUC__) && defined(__i386__)
michael@0: /* We'll use this version by default only where we know it helps.
michael@0: 
michael@0:    regparm() generates warnings on Solaris boxes.   See SF bug #692878.
michael@0: 
michael@0:    Instability reported with egcs on a RedHat Linux 7.3.
michael@0:    Let's comment out:
michael@0:    #define FASTCALL __attribute__((stdcall, regparm(3)))
michael@0:    and let's try this:
michael@0: */
michael@0: #define FASTCALL __attribute__((regparm(3)))
michael@0: #define PTRFASTCALL __attribute__((regparm(3)))
michael@0: #endif
michael@0: 
michael@0: /* Using __fastcall seems to have an unexpected negative effect under
michael@0:    MS VC++, especially for function pointers, so we won't use it for
michael@0:    now on that platform. It may be reconsidered for a future release
michael@0:    if it can be made more effective.
michael@0:    Likely reason: __fastcall on Windows is like stdcall, therefore
michael@0:    the compiler cannot perform stack optimizations for call clusters.
michael@0: */
michael@0: 
michael@0: /* Make sure all of these are defined if they aren't already. */
michael@0: 
michael@0: #ifndef FASTCALL
michael@0: #define FASTCALL
michael@0: #endif
michael@0: 
michael@0: #ifndef PTRCALL
michael@0: #define PTRCALL
michael@0: #endif
michael@0: 
michael@0: #ifndef PTRFASTCALL
michael@0: #define PTRFASTCALL
michael@0: #endif
michael@0: 
michael@0: #ifndef XML_MIN_SIZE
michael@0: #if !defined(__cplusplus) && !defined(inline)
michael@0: #ifdef __GNUC__
michael@0: #define inline __inline
michael@0: #endif /* __GNUC__ */
michael@0: #endif
michael@0: #endif /* XML_MIN_SIZE */
michael@0: 
michael@0: #ifdef __cplusplus
michael@0: #define inline inline
michael@0: #else
michael@0: #ifndef inline
michael@0: #define inline
michael@0: #endif
michael@0: #endif