I've looked basically everywhere, and I can't find any documentation about this question. I want to pass a JS array as a C-array in em++, and everything I've found uses vectors. With vectors, you have to push back every value one by one then pass it into the C++ function. This is slow and really inconvenient, so I'd like to know of a normal C-array way of doing this.
For context, I want to do something like this:
int
add(const int test[], const int size)
{
int res = 0;
for (int i = 0; i < size; i++)
res += test[i];
return res;
};
You can do it with this syntax (using int** will lose size information, What is array to pointer decay?):
#include <utility>
// For an array of size 4
int add4(const int(&values)[4])
{
int sum{ 0 };
// if you cant use range based fors
for (std::size_t n = 0; n < 4; ++n) sum += values[n];
return sum;
}
// For any const sized array
// with this syntax you don't lose size information on the array
template<std::size_t N>
int add(const int(&values)[N])
{
int sum{ 0 };
// I prefer range based fors
for (const int value : values) sum += value;
return sum;
}
int main()
{
int values[4] { 1,2,3,4 };
int sum4 = add4(values);
// compiler will know array has size 8
int values8[]{ 1,2,3,4,5,6,7,8 };
int sum8 = add(values8);
}