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246 lines
7.9 KiB
246 lines
7.9 KiB
4 years ago
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/* -----------------------------------------------------------------------------
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* SWIG API. Portion only visible from SWIG
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* ----------------------------------------------------------------------------- */
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/*
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This file implements the internal macros of the 'SWIG API', which
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are useful to implement all the SWIG target languges.
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Basic preprocessor macros:
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--------------------------
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%arg(Arg) Safe argument wrap
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%str(Arg) Stringtify the argument
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%begin_block Begin a execution block
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%end_block End a execution block
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%block(Block) Execute Block as a excecution block
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%define_as(Def, Val) Define 'Def' as 'Val', expanding Def and Val first
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%ifcplusplus(V1, V2) if C++ Mode; then V1; else V2; fi
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Casting Operations:
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-------------------
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Swig provides the following casting macros, which implement the
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corresponding C++ casting operations:
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%const_cast(a, Type) const_cast<Type >(a)
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%static_cast(a, Type) static_cast<Type >(a)
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%reinterpret_cast(a, Type) reinterpret_cast<Type >(a)
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%numeric_cast(a, Type) static_cast<Type >(a)
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%as_voidptr(a) const_cast<void *>(static_cast<const void *>(a))
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%as_voidptrptr(a) reinterpret_cast<void **>(a)
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or their C unsafe versions. In C++ we use the safe version unless
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SWIG_NO_CPLUSPLUS_CAST is defined (usually via the -nocppcast swig flag).
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Memory allocation:
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------------------
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These allocation/freeing macros are safe to use in C or C++ and
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dispatch the proper new/delete/delete[] or free/malloc calls as
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needed.
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%new_instance(Type) Allocate a new instance of given Type
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%new_copy(value,Type) Allocate and initialize a new instance with 'value'
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%new_array(size,Type) Allocate a new array with given size and Type
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%new_copy_array(cptr,size,Type) Allocate and initialize a new array from 'cptr'
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%delete(cptr) Delete an instance
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%delete_array(cptr) Delete an array
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Auxiliary loop macros:
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----------------------
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%formacro(Macro, Args...) or %formacro_1(Macro, Args...)
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for i in Args
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do
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Macro($i)
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done
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%formacro_2(Macro2, Args...)
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for i,j in Args
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do
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Macro2($i, $j)
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done
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Flags and conditional macros:
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-----------------------------
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%mark_flag(flag)
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flag := True
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%evalif(flag,expr)
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if flag; then
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expr
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fi
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%evalif_2(flag1 flag2,expr)
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if flag1 and flag2; then
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expr
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fi
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*/
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/* -----------------------------------------------------------------------------
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* Basic preprocessor macros
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* ----------------------------------------------------------------------------- */
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#define %arg(Arg...) Arg
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#define %str(Arg) `Arg`
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#ifndef %begin_block
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# define %begin_block do {
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#endif
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#ifndef %end_block
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# define %end_block } while(0)
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#endif
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#define %block(Block...) %begin_block Block; %end_block
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/* define a new macro */
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%define %define_as(Def, Val...)%#define Def Val %enddef
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/* include C++ or else value */
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%define %ifcplusplus(cppval, nocppval)
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#ifdef __cplusplus
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cppval
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#else
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nocppval
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#endif
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%enddef
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/* insert the SWIGVERSION in the interface and the wrapper code */
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#if SWIG_VERSION
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%insert("header") {
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%define_as(SWIGVERSION, SWIG_VERSION)
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%#define SWIG_VERSION SWIGVERSION
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}
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#endif
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/* -----------------------------------------------------------------------------
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* Casting operators
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* ----------------------------------------------------------------------------- */
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#if defined(SWIG_NO_CPLUSPLUS_CAST)
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/* Disable 'modern' cplusplus casting operators */
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# if defined(SWIG_CPLUSPLUS_CAST)
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# undef SWIG_CPLUSPLUS_CAST
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# endif
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#endif
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#if defined(__cplusplus) && defined(SWIG_CPLUSPLUS_CAST)
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# define %const_cast(a,Type...) const_cast< Type >(a)
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# define %static_cast(a,Type...) static_cast< Type >(a)
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# define %reinterpret_cast(a,Type...) reinterpret_cast< Type >(a)
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# define %numeric_cast(a,Type...) static_cast< Type >(a)
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#else /* C case */
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# define %const_cast(a,Type...) (Type)(a)
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# define %static_cast(a,Type...) (Type)(a)
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# define %reinterpret_cast(a,Type...) (Type)(a)
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# define %numeric_cast(a,Type...) (Type)(a)
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#endif /* __cplusplus */
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#define %as_voidptr(a) SWIG_as_voidptr(a)
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#define %as_voidptrptr(a) SWIG_as_voidptrptr(a)
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%insert("header") {
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%define_as(SWIG_as_voidptr(a), %const_cast(%static_cast(a,const void *), void *))
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%define_as(SWIG_as_voidptrptr(a), ((void)%as_voidptr(*a),%reinterpret_cast(a, void**)))
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}
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/* -----------------------------------------------------------------------------
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* Allocating/freeing elements
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* ----------------------------------------------------------------------------- */
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#if defined(__cplusplus)
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# define %new_instance(Type...) (new Type)
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# define %new_copy(val,Type...) (new Type(%static_cast(val, const Type&)))
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# define %new_array(size,Type...) (new Type[size])
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# define %new_copy_array(ptr,size,Type...) %reinterpret_cast(memcpy(%new_array(size,Type), ptr, sizeof(Type)*(size)), Type*)
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# define %delete(cptr) delete cptr
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# define %delete_array(cptr) delete[] cptr
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#else /* C case */
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# define %new_instance(Type...) (Type *)malloc(sizeof(Type))
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# define %new_copy(val,Type...) (Type *)memcpy(%new_instance(Type),&val,sizeof(Type))
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# define %new_array(size,Type...) (Type *)malloc((size)*sizeof(Type))
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# define %new_copy_array(ptr,size,Type...) (Type *)memcpy(%new_array(size,Type), ptr, sizeof(Type)*(size))
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# define %delete(cptr) free((char*)cptr)
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# define %delete_array(cptr) free((char*)cptr)
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#endif /* __cplusplus */
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/* -----------------------------------------------------------------------------
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* Swig names and mangling
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* ----------------------------------------------------------------------------- */
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#define %mangle(Type...) #@Type
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#define %descriptor(Type...) SWIGTYPE_ ## #@Type
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#define %string_name(Name) "SWIG_" %str(Name)
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#define %symbol_name(Name, Type...) SWIG_ ## Name ## _ #@Type
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#define %checkcode(Code) SWIG_TYPECHECK_ ## Code
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/* -----------------------------------------------------------------------------
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* Auxiliar loop macros
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* ----------------------------------------------------------------------------- */
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/* for loop for macro with one argument */
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%define %_formacro_1(macro, arg1,...)macro(arg1)
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#if #__VA_ARGS__ != "__fordone__"
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%_formacro_1(macro, __VA_ARGS__)
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#endif
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%enddef
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/* for loop for macro with one argument */
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%define %formacro_1(macro,...)%_formacro_1(macro,__VA_ARGS__,__fordone__)%enddef
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%define %formacro(macro,...)%_formacro_1(macro,__VA_ARGS__,__fordone__)%enddef
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/* for loop for macro with two arguments */
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%define %_formacro_2(macro, arg1, arg2, ...)macro(arg1, arg2)
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#if #__VA_ARGS__ != "__fordone__"
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%_formacro_2(macro, __VA_ARGS__)
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#endif
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%enddef
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/* for loop for macro with two arguments */
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%define %formacro_2(macro,...)%_formacro_2(macro, __VA_ARGS__, __fordone__)%enddef
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/* -----------------------------------------------------------------------------
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* Swig flags
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* ----------------------------------------------------------------------------- */
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/*
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mark a flag, ie, define a macro name but ignore it in
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the interface.
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the flag can be later used with %evalif
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*/
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%define %mark_flag(x) %define x 1 %enddef %enddef
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/*
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%evalif and %evalif_2 are use to evaluate or process
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an expression if the given predicate is 'true' (1).
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*/
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%define %_evalif(_x,_expr)
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#if _x == 1
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_expr
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#endif
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%enddef
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%define %_evalif_2(_x,_y,_expr)
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#if _x == 1 && _y == 1
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_expr
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#endif
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%enddef
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%define %evalif(_x,_expr...) %_evalif(%arg(_x),%arg(_expr)) %enddef
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%define %evalif_2(_x,_y,_expr...) %_evalif_2(%arg(_x),%arg(_y),%arg(_expr)) %enddef
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