From 51b4ccd6187c62dfb4f2b493951bc830faf1cff4 Mon Sep 17 00:00:00 2001 From: suke Date: Wed, 13 Aug 2014 12:46:23 +0000 Subject: * ext/win32ole/win32ole.c: seperate WIN32OLE_VARIANT src from win32ole.c. * ext/win32ole/win32ole.h: ditto. * ext/win32ole/win32ole_variant.c: ditto. * ext/win32ole/win32ole_variant.c: ditto. * ext/win32ole/depend: ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47172 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- ext/win32ole/win32ole_variant.c | 668 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 668 insertions(+) create mode 100644 ext/win32ole/win32ole_variant.c (limited to 'ext/win32ole/win32ole_variant.c') diff --git a/ext/win32ole/win32ole_variant.c b/ext/win32ole/win32ole_variant.c new file mode 100644 index 0000000000..21de9b7264 --- /dev/null +++ b/ext/win32ole/win32ole_variant.c @@ -0,0 +1,668 @@ +#include "win32ole.h" + +static void olevariant_free(struct olevariantdata *pvar); +static void ole_val2olevariantdata(VALUE val, VARTYPE vt, struct olevariantdata *pvar); +static void ole_set_byref(VARIANT *realvar, VARIANT *var, VARTYPE vt); +static VALUE folevariant_s_allocate(VALUE klass); +static VALUE folevariant_s_array(VALUE klass, VALUE dims, VALUE vvt); +static void check_type_val2variant(VALUE val); +static VALUE folevariant_initialize(VALUE self, VALUE args); +static LONG *ary2safe_array_index(int ary_size, VALUE *ary, SAFEARRAY *psa); +static void unlock_safe_array(SAFEARRAY *psa); +static SAFEARRAY *get_locked_safe_array(VALUE val); +static VALUE folevariant_ary_aref(int argc, VALUE *argv, VALUE self); +static VALUE folevariant_ary_aset(int argc, VALUE *argv, VALUE self); +static VALUE folevariant_value(VALUE self); +static VALUE folevariant_vartype(VALUE self); +static VALUE folevariant_set_value(VALUE self, VALUE val); + +static void +olevariant_free(struct olevariantdata *pvar) +{ + VariantClear(&(pvar->realvar)); + VariantClear(&(pvar->var)); + free(pvar); +} + +static void +ole_val2olevariantdata(VALUE val, VARTYPE vt, struct olevariantdata *pvar) +{ + HRESULT hr = S_OK; + + if (((vt & ~VT_BYREF) == (VT_ARRAY | VT_UI1)) && RB_TYPE_P(val, T_STRING)) { + long len = RSTRING_LEN(val); + void *pdest = NULL; + SAFEARRAY *p = NULL; + SAFEARRAY *psa = SafeArrayCreateVector(VT_UI1, 0, len); + if (!psa) { + rb_raise(rb_eRuntimeError, "fail to SafeArrayCreateVector"); + } + hr = SafeArrayAccessData(psa, &pdest); + if (SUCCEEDED(hr)) { + memcpy(pdest, RSTRING_PTR(val), len); + SafeArrayUnaccessData(psa); + V_VT(&(pvar->realvar)) = (vt & ~VT_BYREF); + p = V_ARRAY(&(pvar->realvar)); + if (p != NULL) { + SafeArrayDestroy(p); + } + V_ARRAY(&(pvar->realvar)) = psa; + if (vt & VT_BYREF) { + V_VT(&(pvar->var)) = vt; + V_ARRAYREF(&(pvar->var)) = &(V_ARRAY(&(pvar->realvar))); + } else { + hr = VariantCopy(&(pvar->var), &(pvar->realvar)); + } + } else { + if (psa) + SafeArrayDestroy(psa); + } + } else if (vt & VT_ARRAY) { + if (val == Qnil) { + V_VT(&(pvar->var)) = vt; + if (vt & VT_BYREF) { + V_ARRAYREF(&(pvar->var)) = &(V_ARRAY(&(pvar->realvar))); + } + } else { + hr = ole_val_ary2variant_ary(val, &(pvar->realvar), (VARTYPE)(vt & ~VT_BYREF)); + if (SUCCEEDED(hr)) { + if (vt & VT_BYREF) { + V_VT(&(pvar->var)) = vt; + V_ARRAYREF(&(pvar->var)) = &(V_ARRAY(&(pvar->realvar))); + } else { + hr = VariantCopy(&(pvar->var), &(pvar->realvar)); + } + } + } +#if (_MSC_VER >= 1300) || defined(__CYGWIN__) || defined(__MINGW32__) + } else if ( (vt & ~VT_BYREF) == VT_I8 || (vt & ~VT_BYREF) == VT_UI8) { + ole_val2variant_ex(val, &(pvar->realvar), (vt & ~VT_BYREF)); + ole_val2variant_ex(val, &(pvar->var), (vt & ~VT_BYREF)); + V_VT(&(pvar->var)) = vt; + if (vt & VT_BYREF) { + ole_set_byref(&(pvar->realvar), &(pvar->var), vt); + } +#endif + } else { + if (val == Qnil) { + V_VT(&(pvar->var)) = vt; + if (vt == (VT_BYREF | VT_VARIANT)) { + ole_set_byref(&(pvar->realvar), &(pvar->var), vt); + } else { + V_VT(&(pvar->realvar)) = vt & ~VT_BYREF; + if (vt & VT_BYREF) { + ole_set_byref(&(pvar->realvar), &(pvar->var), vt); + } + } + } else { + ole_val2variant_ex(val, &(pvar->realvar), (VARTYPE)(vt & ~VT_BYREF)); + if (vt == (VT_BYREF | VT_VARIANT)) { + ole_set_byref(&(pvar->realvar), &(pvar->var), vt); + } else if (vt & VT_BYREF) { + if ( (vt & ~VT_BYREF) != V_VT(&(pvar->realvar))) { + hr = VariantChangeTypeEx(&(pvar->realvar), &(pvar->realvar), + cWIN32OLE_lcid, 0, (VARTYPE)(vt & ~VT_BYREF)); + } + if (SUCCEEDED(hr)) { + ole_set_byref(&(pvar->realvar), &(pvar->var), vt); + } + } else { + if (vt == V_VT(&(pvar->realvar))) { + hr = VariantCopy(&(pvar->var), &(pvar->realvar)); + } else { + hr = VariantChangeTypeEx(&(pvar->var), &(pvar->realvar), + cWIN32OLE_lcid, 0, vt); + } + } + } + } + if (FAILED(hr)) { + ole_raise(hr, eWIN32OLERuntimeError, "failed to change type"); + } +} + +static void +ole_set_byref(VARIANT *realvar, VARIANT *var, VARTYPE vt) +{ + V_VT(var) = vt; + if (vt == (VT_VARIANT|VT_BYREF)) { + V_VARIANTREF(var) = realvar; + } else { + if (V_VT(realvar) != (vt & ~VT_BYREF)) { + rb_raise(eWIN32OLERuntimeError, "variant type mismatch"); + } + switch(vt & ~VT_BYREF) { + case VT_I1: + V_I1REF(var) = &V_I1(realvar); + break; + case VT_UI1: + V_UI1REF(var) = &V_UI1(realvar); + break; + case VT_I2: + V_I2REF(var) = &V_I2(realvar); + break; + case VT_UI2: + V_UI2REF(var) = &V_UI2(realvar); + break; + case VT_I4: + V_I4REF(var) = &V_I4(realvar); + break; + case VT_UI4: + V_UI4REF(var) = &V_UI4(realvar); + break; + case VT_R4: + V_R4REF(var) = &V_R4(realvar); + break; + case VT_R8: + V_R8REF(var) = &V_R8(realvar); + break; + +#if (_MSC_VER >= 1300) || defined(__CYGWIN__) || defined(__MINGW32__) +#ifdef V_I8REF + case VT_I8: + V_I8REF(var) = &V_I8(realvar); + break; +#endif +#ifdef V_UI8REF + case VT_UI8: + V_UI8REF(var) = &V_UI8(realvar); + break; +#endif +#endif + case VT_INT: + V_INTREF(var) = &V_INT(realvar); + break; + + case VT_UINT: + V_UINTREF(var) = &V_UINT(realvar); + break; + + case VT_CY: + V_CYREF(var) = &V_CY(realvar); + break; + case VT_DATE: + V_DATEREF(var) = &V_DATE(realvar); + break; + case VT_BSTR: + V_BSTRREF(var) = &V_BSTR(realvar); + break; + case VT_DISPATCH: + V_DISPATCHREF(var) = &V_DISPATCH(realvar); + break; + case VT_ERROR: + V_ERRORREF(var) = &V_ERROR(realvar); + break; + case VT_BOOL: + V_BOOLREF(var) = &V_BOOL(realvar); + break; + case VT_UNKNOWN: + V_UNKNOWNREF(var) = &V_UNKNOWN(realvar); + break; + case VT_ARRAY: + V_ARRAYREF(var) = &V_ARRAY(realvar); + break; + default: + rb_raise(eWIN32OLERuntimeError, "unknown type specified(setting BYREF):%d", vt); + break; + } + } +} + +static VALUE +folevariant_s_allocate(VALUE klass) +{ + struct olevariantdata *pvar; + VALUE obj; + ole_initialize(); + obj = Data_Make_Struct(klass,struct olevariantdata,0,olevariant_free,pvar); + VariantInit(&(pvar->var)); + VariantInit(&(pvar->realvar)); + return obj; +} + +/* + * call-seq: + * WIN32OLE_VARIANT.array(ary, vt) + * + * Returns Ruby object wrapping OLE variant whose variant type is VT_ARRAY. + * The first argument should be Array object which specifies dimensions + * and each size of dimensions of OLE array. + * The second argument specifies variant type of the element of OLE array. + * + * The following create 2 dimensions OLE array. The first dimensions size + * is 3, and the second is 4. + * + * ole_ary = WIN32OLE_VARIANT.array([3,4], VT_I4) + * ruby_ary = ole_ary.value # => [[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]] + * + */ +static VALUE +folevariant_s_array(VALUE klass, VALUE elems, VALUE vvt) +{ + VALUE obj = Qnil; + VARTYPE vt; + struct olevariantdata *pvar; + SAFEARRAYBOUND *psab = NULL; + SAFEARRAY *psa = NULL; + UINT dim = 0; + UINT i = 0; + + ole_initialize(); + + vt = NUM2UINT(vvt); + vt = (vt | VT_ARRAY); + Check_Type(elems, T_ARRAY); + obj = folevariant_s_allocate(klass); + + Data_Get_Struct(obj, struct olevariantdata, pvar); + dim = RARRAY_LEN(elems); + + psab = ALLOC_N(SAFEARRAYBOUND, dim); + + if(!psab) { + rb_raise(rb_eRuntimeError, "memory allocation error"); + } + + for (i = 0; i < dim; i++) { + psab[i].cElements = FIX2INT(rb_ary_entry(elems, i)); + psab[i].lLbound = 0; + } + + psa = SafeArrayCreate((VARTYPE)(vt & VT_TYPEMASK), dim, psab); + if (psa == NULL) { + if (psab) free(psab); + rb_raise(rb_eRuntimeError, "memory allocation error(SafeArrayCreate)"); + } + + V_VT(&(pvar->var)) = vt; + if (vt & VT_BYREF) { + V_VT(&(pvar->realvar)) = (vt & ~VT_BYREF); + V_ARRAY(&(pvar->realvar)) = psa; + V_ARRAYREF(&(pvar->var)) = &(V_ARRAY(&(pvar->realvar))); + } else { + V_ARRAY(&(pvar->var)) = psa; + } + if (psab) free(psab); + return obj; +} + +static void +check_type_val2variant(VALUE val) +{ + VALUE elem; + int len = 0; + int i = 0; + if(!rb_obj_is_kind_of(val, cWIN32OLE) && + !rb_obj_is_kind_of(val, cWIN32OLE_VARIANT) && + !rb_obj_is_kind_of(val, rb_cTime)) { + switch (TYPE(val)) { + case T_ARRAY: + len = RARRAY_LEN(val); + for(i = 0; i < len; i++) { + elem = rb_ary_entry(val, i); + check_type_val2variant(elem); + } + break; + case T_STRING: + case T_FIXNUM: + case T_BIGNUM: + case T_FLOAT: + case T_TRUE: + case T_FALSE: + case T_NIL: + break; + default: + rb_raise(rb_eTypeError, "can not convert WIN32OLE_VARIANT from type %s", + rb_obj_classname(val)); + } + } +} + +/* + * Document-class: WIN32OLE_VARIANT + * + * WIN32OLE_VARIANT objects represents OLE variant. + * + * Win32OLE converts Ruby object into OLE variant automatically when + * invoking OLE methods. If OLE method requires the argument which is + * different from the variant by automatic conversion of Win32OLE, you + * can convert the specfied variant type by using WIN32OLE_VARIANT class. + * + * param = WIN32OLE_VARIANT.new(10, WIN32OLE::VARIANT::VT_R4) + * oleobj.method(param) + * + * WIN32OLE_VARIANT does not support VT_RECORD variant. Use WIN32OLE_RECORD + * class instead of WIN32OLE_VARIANT if the VT_RECORD variant is needed. + */ + +/* + * call-seq: + * WIN32OLE_VARIANT.new(val, vartype) #=> WIN32OLE_VARIANT object. + * + * Returns Ruby object wrapping OLE variant. + * The first argument specifies Ruby object to convert OLE variant variable. + * The second argument specifies VARIANT type. + * In some situation, you need the WIN32OLE_VARIANT object to pass OLE method + * + * shell = WIN32OLE.new("Shell.Application") + * folder = shell.NameSpace("C:\\Windows") + * item = folder.ParseName("tmp.txt") + * # You can't use Ruby String object to call FolderItem.InvokeVerb. + * # Instead, you have to use WIN32OLE_VARIANT object to call the method. + * shortcut = WIN32OLE_VARIANT.new("Create Shortcut(\&S)") + * item.invokeVerb(shortcut) + * + */ +static VALUE +folevariant_initialize(VALUE self, VALUE args) +{ + int len = 0; + VARIANT var; + VALUE val; + VALUE vvt; + VARTYPE vt; + struct olevariantdata *pvar; + + len = RARRAY_LEN(args); + if (len < 1 || len > 3) { + rb_raise(rb_eArgError, "wrong number of arguments (%d for 1..3)", len); + } + VariantInit(&var); + val = rb_ary_entry(args, 0); + + check_type_val2variant(val); + + Data_Get_Struct(self, struct olevariantdata, pvar); + if (len == 1) { + ole_val2variant(val, &(pvar->var)); + } else { + vvt = rb_ary_entry(args, 1); + vt = NUM2INT(vvt); + if ((vt & VT_TYPEMASK) == VT_RECORD) { + rb_raise(rb_eArgError, "not supported VT_RECORD WIN32OLE_VARIANT object"); + } + ole_val2olevariantdata(val, vt, pvar); + } + return self; +} + +static SAFEARRAY * +get_locked_safe_array(VALUE val) +{ + struct olevariantdata *pvar; + SAFEARRAY *psa = NULL; + HRESULT hr; + Data_Get_Struct(val, struct olevariantdata, pvar); + if (!(V_VT(&(pvar->var)) & VT_ARRAY)) { + rb_raise(rb_eTypeError, "variant type is not VT_ARRAY."); + } + psa = V_ISBYREF(&(pvar->var)) ? *V_ARRAYREF(&(pvar->var)) : V_ARRAY(&(pvar->var)); + if (psa == NULL) { + return psa; + } + hr = SafeArrayLock(psa); + if (FAILED(hr)) { + ole_raise(hr, rb_eRuntimeError, "failed to SafeArrayLock"); + } + return psa; +} + +static LONG * +ary2safe_array_index(int ary_size, VALUE *ary, SAFEARRAY *psa) +{ + long dim; + LONG *pid; + long i; + dim = SafeArrayGetDim(psa); + if (dim != ary_size) { + rb_raise(rb_eArgError, "unmatch number of indices"); + } + pid = ALLOC_N(LONG, dim); + if (pid == NULL) { + rb_raise(rb_eRuntimeError, "failed to allocate memory for indices"); + } + for (i = 0; i < dim; i++) { + pid[i] = NUM2INT(ary[i]); + } + return pid; +} + +static void +unlock_safe_array(SAFEARRAY *psa) +{ + HRESULT hr; + hr = SafeArrayUnlock(psa); + if (FAILED(hr)) { + ole_raise(hr, rb_eRuntimeError, "failed to SafeArrayUnlock"); + } +} + +/* + * call-seq: + * WIN32OLE_VARIANT[i,j,...] #=> element of OLE array. + * + * Returns the element of WIN32OLE_VARIANT object(OLE array). + * This method is available only when the variant type of + * WIN32OLE_VARIANT object is VT_ARRAY. + * + * REMARK: + * The all indicies should be 0 or natural number and + * lower than or equal to max indicies. + * (This point is different with Ruby Array indicies.) + * + * obj = WIN32OLE_VARIANT.new([[1,2,3],[4,5,6]]) + * p obj[0,0] # => 1 + * p obj[1,0] # => 4 + * p obj[2,0] # => WIN32OLERuntimeError + * p obj[0, -1] # => WIN32OLERuntimeError + * + */ +static VALUE +folevariant_ary_aref(int argc, VALUE *argv, VALUE self) +{ + struct olevariantdata *pvar; + SAFEARRAY *psa; + VALUE val = Qnil; + VARIANT variant; + LONG *pid; + HRESULT hr; + + Data_Get_Struct(self, struct olevariantdata, pvar); + if (!V_ISARRAY(&(pvar->var))) { + rb_raise(eWIN32OLERuntimeError, + "`[]' is not available for this variant type object"); + } + psa = get_locked_safe_array(self); + if (psa == NULL) { + return val; + } + + pid = ary2safe_array_index(argc, argv, psa); + + VariantInit(&variant); + V_VT(&variant) = (V_VT(&(pvar->var)) & ~VT_ARRAY) | VT_BYREF; + hr = SafeArrayPtrOfIndex(psa, pid, &V_BYREF(&variant)); + if (FAILED(hr)) { + ole_raise(hr, eWIN32OLERuntimeError, "failed to SafeArrayPtrOfIndex"); + } + val = ole_variant2val(&variant); + + unlock_safe_array(psa); + if (pid) free(pid); + return val; +} + +/* + * call-seq: + * WIN32OLE_VARIANT[i,j,...] = val #=> set the element of OLE array + * + * Set the element of WIN32OLE_VARIANT object(OLE array) to val. + * This method is available only when the variant type of + * WIN32OLE_VARIANT object is VT_ARRAY. + * + * REMARK: + * The all indicies should be 0 or natural number and + * lower than or equal to max indicies. + * (This point is different with Ruby Array indicies.) + * + * obj = WIN32OLE_VARIANT.new([[1,2,3],[4,5,6]]) + * obj[0,0] = 7 + * obj[1,0] = 8 + * p obj.value # => [[7,2,3], [8,5,6]] + * obj[2,0] = 9 # => WIN32OLERuntimeError + * obj[0, -1] = 9 # => WIN32OLERuntimeError + * + */ +static VALUE +folevariant_ary_aset(int argc, VALUE *argv, VALUE self) +{ + struct olevariantdata *pvar; + SAFEARRAY *psa; + VARIANT var; + VARTYPE vt; + LONG *pid; + HRESULT hr; + VOID *p = NULL; + + Data_Get_Struct(self, struct olevariantdata, pvar); + if (!V_ISARRAY(&(pvar->var))) { + rb_raise(eWIN32OLERuntimeError, + "`[]' is not available for this variant type object"); + } + psa = get_locked_safe_array(self); + if (psa == NULL) { + rb_raise(rb_eRuntimeError, "failed to get SafeArray pointer"); + } + + pid = ary2safe_array_index(argc-1, argv, psa); + + VariantInit(&var); + vt = (V_VT(&(pvar->var)) & ~VT_ARRAY); + p = val2variant_ptr(argv[argc-1], &var, vt); + if ((V_VT(&var) == VT_DISPATCH && V_DISPATCH(&var) == NULL) || + (V_VT(&var) == VT_UNKNOWN && V_UNKNOWN(&var) == NULL)) { + rb_raise(eWIN32OLERuntimeError, "argument does not have IDispatch or IUnknown Interface"); + } + hr = SafeArrayPutElement(psa, pid, p); + if (FAILED(hr)) { + ole_raise(hr, eWIN32OLERuntimeError, "failed to SafeArrayPutElement"); + } + + unlock_safe_array(psa); + if (pid) free(pid); + return argv[argc-1]; +} + +/* + * call-seq: + * WIN32OLE_VARIANT.value #=> Ruby object. + * + * Returns Ruby object value from OLE variant. + * obj = WIN32OLE_VARIANT.new(1, WIN32OLE::VARIANT::VT_BSTR) + * obj.value # => "1" (not Fixnum object, but String object "1") + * + */ +static VALUE +folevariant_value(VALUE self) +{ + struct olevariantdata *pvar; + VALUE val = Qnil; + VARTYPE vt; + int dim; + SAFEARRAY *psa; + Data_Get_Struct(self, struct olevariantdata, pvar); + + val = ole_variant2val(&(pvar->var)); + vt = V_VT(&(pvar->var)); + + if ((vt & ~VT_BYREF) == (VT_UI1|VT_ARRAY)) { + if (vt & VT_BYREF) { + psa = *V_ARRAYREF(&(pvar->var)); + } else { + psa = V_ARRAY(&(pvar->var)); + } + if (!psa) { + return val; + } + dim = SafeArrayGetDim(psa); + if (dim == 1) { + val = rb_funcall(val, rb_intern("pack"), 1, rb_str_new2("C*")); + } + } + return val; +} + +/* + * call-seq: + * WIN32OLE_VARIANT.vartype #=> OLE variant type. + * + * Returns OLE variant type. + * obj = WIN32OLE_VARIANT.new("string") + * obj.vartype # => WIN32OLE::VARIANT::VT_BSTR + * + */ +static VALUE +folevariant_vartype(VALUE self) +{ + struct olevariantdata *pvar; + Data_Get_Struct(self, struct olevariantdata, pvar); + return INT2FIX(V_VT(&pvar->var)); +} + +/* + * call-seq: + * WIN32OLE_VARIANT.value = val #=> set WIN32OLE_VARIANT value to val. + * + * Sets variant value to val. If the val type does not match variant value + * type(vartype), then val is changed to match variant value type(vartype) + * before setting val. + * Thie method is not available when vartype is VT_ARRAY(except VT_UI1|VT_ARRAY). + * If the vartype is VT_UI1|VT_ARRAY, the val should be String object. + * + * obj = WIN32OLE_VARIANT.new(1) # obj.vartype is WIN32OLE::VARIANT::VT_I4 + * obj.value = 3.2 # 3.2 is changed to 3 when setting value. + * p obj.value # => 3 + */ +static VALUE +folevariant_set_value(VALUE self, VALUE val) +{ + struct olevariantdata *pvar; + VARTYPE vt; + Data_Get_Struct(self, struct olevariantdata, pvar); + vt = V_VT(&(pvar->var)); + if (V_ISARRAY(&(pvar->var)) && ((vt & ~VT_BYREF) != (VT_UI1|VT_ARRAY) || !RB_TYPE_P(val, T_STRING))) { + rb_raise(eWIN32OLERuntimeError, + "`value=' is not available for this variant type object"); + } + ole_val2olevariantdata(val, vt, pvar); + return Qnil; +} + +void +Init_win32ole_variant() +{ + cWIN32OLE_VARIANT = rb_define_class("WIN32OLE_VARIANT", rb_cObject); + rb_define_alloc_func(cWIN32OLE_VARIANT, folevariant_s_allocate); + rb_define_singleton_method(cWIN32OLE_VARIANT, "array", folevariant_s_array, 2); + rb_define_method(cWIN32OLE_VARIANT, "initialize", folevariant_initialize, -2); + rb_define_method(cWIN32OLE_VARIANT, "value", folevariant_value, 0); + rb_define_method(cWIN32OLE_VARIANT, "value=", folevariant_set_value, 1); + rb_define_method(cWIN32OLE_VARIANT, "vartype", folevariant_vartype, 0); + rb_define_method(cWIN32OLE_VARIANT, "[]", folevariant_ary_aref, -1); + rb_define_method(cWIN32OLE_VARIANT, "[]=", folevariant_ary_aset, -1); + + /* + * represents VT_EMPTY OLE object. + */ + rb_define_const(cWIN32OLE_VARIANT, "Empty", rb_funcall(cWIN32OLE_VARIANT, rb_intern("new"), 2, Qnil, INT2FIX(VT_EMPTY))); + + /* + * represents VT_NULL OLE object. + */ + rb_define_const(cWIN32OLE_VARIANT, "Null", rb_funcall(cWIN32OLE_VARIANT, rb_intern("new"), 2, Qnil, INT2FIX(VT_NULL))); + + /* + * represents Nothing of VB.NET or VB. + */ + rb_define_const(cWIN32OLE_VARIANT, "Nothing", rb_funcall(cWIN32OLE_VARIANT, rb_intern("new"), 2, Qnil, INT2FIX(VT_DISPATCH))); +} -- cgit v1.2.3