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[SWIG][mmlspark] allow allocating more than int max array #2859

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Apr 19, 2020
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[SWIG][mmlspark] allow allocating more than int max array #2859

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35 changes: 30 additions & 5 deletions swig/lightgbmlib.i
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Original file line number Diff line number Diff line change
Expand Up @@ -233,11 +233,6 @@
%pointer_cast(int32_t *, void *, int32_t_to_voidp_ptr)
%pointer_cast(int64_t *, void *, int64_t_to_voidp_ptr)

%array_functions(double, doubleArray)
%array_functions(float, floatArray)
%array_functions(int, intArray)
%array_functions(long, longArray)

/* Custom pointer manipulation template */
%define %pointer_manipulation(TYPE, NAME)
%{
Expand Down Expand Up @@ -278,6 +273,36 @@ TYPE *NAME##_handle();

%enddef

%define %long_array_functions(TYPE,NAME)
%{
static TYPE *new_##NAME(int64_t nelements) { %}
%{ return new TYPE[nelements](); %}
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%{}

static void delete_##NAME(TYPE *ary) { %}
%{ delete [] ary; %}
%{}

static TYPE NAME##_getitem(TYPE *ary, int64_t index) {
return ary[index];
}
static void NAME##_setitem(TYPE *ary, int64_t index, TYPE value) {
ary[index] = value;
}
%}

TYPE *new_##NAME(int64_t nelements);
void delete_##NAME(TYPE *ary);
TYPE NAME##_getitem(TYPE *ary, int64_t index);
void NAME##_setitem(TYPE *ary, int64_t index, TYPE value);

%enddef

%long_array_functions(double, doubleArray)
%long_array_functions(float, floatArray)
%long_array_functions(int, intArray)
%long_array_functions(long, longArray)

%pointer_manipulation(void*, voidpp)

/* Allow dereferencing of void** to void* */
Expand Down