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429 lines
13 KiB
429 lines
13 KiB
pushdef(_prediv,divnum)divert(-1)dnl Redirect output to /dev/null for now
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changecom(`|')
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| M4 macros for munging dinput.w
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| begindoc / enddoc
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| everything between begindoc and enddoc is ignored. They are in the .w
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| file so that autodoc can extract the documentation.
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define(`begindoc',`divert(-1)dnl')
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define(`enddoc',`divert('_prediv`)dnl')
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| Internal macros which persist outside a begin_interface / end_interface
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| begin with _ so that they won't collide with words that happen to
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| appear in dinput.w
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| Yeah, it isn't foolproof, but it's close enough for now.
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|-----------------------------------------------------------------------------
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| _Quote quotes its argument
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define(`_Quote', `$@')
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|-----------------------------------------------------------------------------
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| strsubst performs a search-and-replace on its argument
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| First, the helper functions...
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| strsubst__ -- Performs one found substitution, or stops
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| $1 = processed source string (don't rescan)
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| $2 = unprocessed source string
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| $3 = old
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| $4 = new
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| $5 = location where `old' was found in $1, or -1 if stop
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define(`strsubst__',
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`ifelse($5,-1,`$1$2',
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`strsubst_(`$1'_Quote(substr(`$2',0,$5))`$4',
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_Quote(substr(`$2',eval($5+len(`$3')))),
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`$3',`$4')')')
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| strsubst_ -- Try to perform one substitution, or stop
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| $1 = processed source string (don't rescan)
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| $2 = unprocessed source string
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| $3 = old
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| $4 = new
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define(`strsubst_', `strsubst__(`$1',`$2',`$3',`$4',index(`$2',`$3'))')
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| strsubst -- Perform a search-and-replace
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| $1 = source string
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| $2 = old
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| $3 = new
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define(`strsubst', `strsubst_(`',`$1',`$2',`$3')')
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|-----------------------------------------------------------------------------
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| uppercase converts a string to uppercase
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define(`uppercase',
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`translit(`$1', `abcdefghijklmnopqrstuvwxyz',
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`ABCDEFGHIJKLMNOPQRSTUVWXYZ')')
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|-----------------------------------------------------------------------------
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| Interface definition macros. It goes like this:
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| begin_interface(IMumble%, IUnknown)
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| begin_methods
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| declare_method(DeleteFeedback,DWORD)
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| declare_method(EnumFeedback,LPDIENUMFEEDBACKPROC%, LPVOID)
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| end_methods
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| end_interface
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| (Actually, the second parameter to begin_interface is assumed
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| to be IUnknown if omitted.)
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| While an interface is being built:
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| _itf contains the name of the interface
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| _itfP contains the name of the interface, sans % sign
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| _itfBase contains the name of the base interface
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| _itfBase{ contains the name of the base interface, sans % sign
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| _ucP contains an uppercase version of _itfP, sans leading `I'
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| _cset contains the current character set (W or A)
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| _methods contains a list of the methods, in the form
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| _invoke_(RETVAL,Method1,arg1,arg2)_invoke_(RETVAL,Method2,arg1,arg2)...
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| except that you might find an _invoke2_() inserted when the
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| base class methods disappear and the extended methods emerge.
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| declare_method takes a variable number of parameters. The first
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| is the method name. The rest are method argument types.
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| declare_method_ is like declare_method, except you can override
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| the return value.
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define(`begin_interface',`pushdef(`_itf',`$1')'dnl
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`pushdef(`_itfBase', ifelse(`$2',`', `IUnknown', `$2'))dnl')
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define(`begin_methods',
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`pushdef(`_methods',
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`_invoke2_(ifelse(_itfBase, `IUnknown', `_itf', `_itfBase'))')dnl')
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define(`declare_method_',
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`define(`_methods',defn(`_methods')`_invoke_($*)')dnl')
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define(`declare_method', `declare_method_(HRESULT,$*)')
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define(`end_base_class_methods',
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`define(`_methods',defn(`_methods')`_invoke2_(_itf)')dnl')
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define(`end_methods',`_emit_methods`'popdef(`_methods')dnl')
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define(`end_interface',`popdef(`_itf')dnl')
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|-----------------------------------------------------------------------------
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| _invoke_per_method calls its argument macro once for each method.
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| Optional second argument handles _invoke2_'s.
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define(`_invoke_per_method',
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`pushdef(`_invoke_', defn(`$1'))'dnl
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`pushdef(`_invoke2_', ifelse(`$2', `', `', defn(`$2')))'dnl
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`_methods`'popdef(`_invoke_')popdef(`_invoke2_')')
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|-----------------------------------------------------------------------------
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| _DePercent
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| Remove percent signs by turning TSTR% into WSTR/STR and other %'s
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| into W or A. Turning TSTR% into WSTR/STR is a hack: We have more
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| macros that map symbols like LPTSTRW -> LPWSTR.
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| $1 - W or A
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| $2... - the thing to change
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define(`_DePercent', `translit(`$2', `%', `$1')')
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define(`LPTSTRW', `LPWSTR')
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define(`LPTSTRA', `LPSTR')
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define(`LPCTSTRW', `LPCWSTR')
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define(`LPCTSTRA', `LPCSTR')
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|-----------------------------------------------------------------------------
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| _DoItf emits a single interface definition in the appropriate
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| character set.
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| $1 - character set (A or W)
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| _itf - temporarily redefined to the de-percentified name
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| _TF - interface name uppercased, without the leading "I"
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define(`_DoItf',
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`pushdef(`_cset', `$1')'dnl
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`pushdef(`_itf', _DePercent(`$1', _itf))'dnl
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`pushdef(`_itfBase', _DePercent(`$1', _itfBase))'dnl
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`pushdef(`_TF', uppercase(substr(_itf, 1)))'dnl
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`#undef INTERFACE
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`#'define INTERFACE _itf
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DECLARE_INTERFACE_(_itf, _itfBase)
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{
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/*** IUnknown methods ***/
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STDMETHOD(QueryInterface)(THIS_ REFIID riid, LPVOID * ppvObj) PURE;
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STDMETHOD_(ULONG,AddRef)(THIS) PURE;
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STDMETHOD_(ULONG,Release)(THIS) PURE;
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_invoke_per_method(`_emit_method_definition', `_emit_class_header')};
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typedef struct _itf *LP`'_TF;
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popdef(`_TF')popdef(`_itf')popdef(`_itfBase')popdef(`_cset')')
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|-----------------------------------------------------------------------------
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| _emit_method_definition
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| Called once for each method. Generates the STDMETHOD() line.
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| $1 - return type (usually HRESULT)
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| $2 - method name
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| $3 - arguments
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| If the return type is HRESULT, then use STDMETHOD. Otherwise,
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| use STDMETHOD_.
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| If there are no arguments, then use THIS. Otherwise, use THIS_.
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define(`_emit_method_definition',
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`_DePercent(_cset,
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ifelse($1,HRESULT,
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` STDMETHOD($2)',
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` STDMETHOD_($1,$2)')`(ifelse($#,2, THIS,
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`_Quote(THIS_ shift(shift($*)))')) PURE;
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')')
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|-----------------------------------------------------------------------------
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| _emit_class_header
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| Called once for each change of class. Generates a happy comment block.
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define(`_emit_class_header',
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`
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/*** $1 methods ***/
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')
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|-----------------------------------------------------------------------------
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| _DoAfterItfVariation
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| Emit $1, first as W, then as A.
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define(`_DoAfterItfVariation',
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`#ifdef UNICODE
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_DePercent(`W', `$*')
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#else
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_DePercent(`A', `$*')
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#endif')
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|-----------------------------------------------------------------------------
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| _DoAfterItf emits the follow-up stuff that comes after an interface
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| definition. If the interface name contains a percent sign, emit
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| the appropriate mix.
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define(`_DoAfterItf',
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`ifelse(_itf, _itfP,, `_DoAfterItfVariation(
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`#'define IID_`'_itfP IID_`'_itf
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`#'define _itfP _itf
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`#'define _itfP`'Vtbl _itf`'Vtbl)
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typedef struct _itfP *LP`'_ucP;
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')#if !defined(__cplusplus) || defined(CINTERFACE)
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_EmitWrapper(HRESULT, `QueryInterface', REFIID riid, LPVOID * ppvObj)'dnl
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`_EmitWrapper(ULONG, `AddRef')'dnl
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`_EmitWrapper(ULONG, `Release')'dnl
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`_invoke_per_method( `_EmitWrapper')#else
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_EmitCPPWrapper(HRESULT, `QueryInterface', REFIID riid, LPVOID * ppvObj)'dnl
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`_EmitCPPWrapper(ULONG, `AddRef')'dnl
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`_EmitCPPWrapper(ULONG, `Release')'dnl
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`_invoke_per_method( `_EmitCPPWrapper')#endif
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')
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|-----------------------------------------------------------------------------
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| _Arity - generate fake arguments based on arity
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| What comes out is "Method(p,a,b,c)" if arity is 4
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| Note that we skip `p' in the alphabetical list. Duh.
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| $1 = method
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| $2 = number of arguments (including method itself and return value)
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define(`_Arity',
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`$1(substr(`p,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,q,r,s,t,u,v,w,x,y,z',
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0, eval($2 * 2 - 3)))')
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|-----------------------------------------------------------------------------
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| _ArityCPP - generate fake arguments based on arity
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| What comes out is "Method(a,b,c)" if arity is 4 (we ate the `p')
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| Note that we skip `p' in the alphabetical list. Duh.
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| Note also that we need to special-case the situation where
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| the arity is exactly zero, so we don't underflow.
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| $1 = method
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| $2 = number of arguments (including method itself and return value)
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define(`_ArityCPP',
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`$1(ifelse($2,2,,`substr(`a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,q,r,s,t,u,v,w,x,y,z',
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0, eval($2 * 2 - 5))'))')
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|-----------------------------------------------------------------------------
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| _EmitWrapper - generate a wrapper macro
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| _itfP - interface name without % sign
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| $1 - return value name
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| $2 - method name
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| $3... - other arguments
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define(`_EmitWrapper',
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``#'define _itfP`'_`'_Arity($2,$#) (p)->lpVtbl->_Arity($2,$#)
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')
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|-----------------------------------------------------------------------------
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| _EmitCPPWrapper - generate a C++ wrapper macro
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| _itfP - interface name without % sign
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| $1 - return value name
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| $2 - method name
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| $3... - other arguments
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define(`_EmitCPPWrapper',
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``#'define _itfP`'_`'_Arity($2,$#) (p)->_ArityCPP($2,$#)
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')
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|-----------------------------------------------------------------------------
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| The long-awaited _emit_methods, which drives all the real work.
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|define(`emit_methods', `invoke_per_method(`_DoItf')')
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define(`_emit_methods',
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`pushdef(`_itfP', translit(_itf, `%'))'dnl
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`pushdef(`_ucP', uppercase(substr(_itfP, 1)))'dnl
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`ifelse(index(_itf, `%'), -1, `_DoItf(`W')',
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`_DoItf(`W')_DoItf(`A')')'dnl
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`_DoAfterItf()popdef(`_ucP')popdef(`_itfP')')
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|-----------------------------------------------------------------------------
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| dik_define - remember the definition as an m4 macro before spitting it out
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define(`dik_def', `define(strsubst(`_$1',` '),$2)`#'define `$1' $2')
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|-----------------------------------------------------------------------------
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| Message cracker definition macros. It goes like this:
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| begin_message_cracker(DIDM_,IDirectInputDeviceCallback *,this,CDIDev)
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| message_cracker(Acquire,HANDLE,hevt)
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| message_cracker(GetDataFormat,,,LPDIDATAFORMAT,pdidf)
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| end_message_cracker()
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|-----------------------------------------------------------------------------
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| _ifnb - macro which emits its second argument if the first is nonblank
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define(`_ifnb', `ifelse(`$1',,,`$2')')
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|-----------------------------------------------------------------------------
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| begin_message_cracker - Begin a set of message crackers
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| $1 - prefix for messages
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| $2 - type of first parameter
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| $3 - name of first parameter
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| $4 - type of parent object
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| For example, Windows messages would be
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| begin_message_cracker(WM_,HWND,hwnd,?)
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| IDirectInputDeviceCallback would be
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| begin_message_cracker(DIDM_,IDirectInputDeviceCallback *,this,CDIDev)
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| Variables used during message cracker macro generation:
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| _prefix - the prefix for the message
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| _type1 - type of the first argument
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| _name1 - name of the first argument
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| _ptype1 - type of parent object
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define(`begin_message_cracker',
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`pushdef(`_prefix',`$1')'dnl
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`pushdef(`_type1',`$2')'dnl
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`pushdef(`_name1',`$3')'dnl
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`pushdef(`_ptype',`$4')'dnl
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`HRESULT NTAPI;internal
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_ptype`'_CallDevice(struct _ptype *this, UINT didm, WPARAM wp, LPARAM lp);;internal
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')
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define(`end_message_cracker',
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`popdef(`_prefix')popdef(`_type1')popdef(`_name1')popdef(`_ptype')')
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|-----------------------------------------------------------------------------
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| message_cracker
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| $1 - name of message, mixed-case.
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| $2 - type of wParam, or null if wParam is ignored
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| $3 - name of wParam, or null if wParam is ignored
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| $4 - type of lParam, or null if lParam is ignored
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| $5 - name of lParam, or null if lParam is ignored
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| Local variable:
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| _uc - uppercase version of $1 with _prefix attached
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define(`message_cracker',
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`pushdef(`_uc', _prefix`'uppercase(`$1'))'dnl
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`/*
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* HRESULT Cls_On$1('dnl
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`_ifnb(`$2$4',`
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* ')_type1 _name1`'_ifnb(`$2',`, $2 $3`'')_ifnb(`$4',`, $4 $5'))
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*/
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`#'define HANDLE_`'_uc`'(_name1, wParam, lParam, fn) \
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((fn)((_name1)'dnl
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`_ifnb(`$2',`, ($2)(wParam)')'dnl
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`_ifnb(`$4',`, ($4)(lParam)')'dnl
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`))
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`#'define FORWARD_`'_uc`'(_name1`''dnl
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`_ifnb(`$2',`, $3`'')'dnl
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`_ifnb(`$4',`, $5'), fn) \
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((fn)(_name1, _uc, 'dnl
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`ifelse(`$2',,0,`(WPARAM)($3)'), 'dnl
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`ifelse(`$4',,0,`(LPARAM)($5)')))
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HRESULT static __inline
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dcb$1(struct _ptype *this`'_ifnb(`$2',`, $2 $3`'')_ifnb(`$4',`, $4 $5'))
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{
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return FORWARD_`'_uc`'(this`'_ifnb(`$2',`, $3`'')_ifnb(`$4',`, $5'),'dnl
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` _ptype`'_CallDevice);
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}
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')
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|-----------------------------------------------------------------------------
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| Restore comments and the previous diversion
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changecom()
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divert(_prediv)popdef(`_prediv')dnl End of macro header file
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