pointers - Call native method from Swift that has uint8_t ** as output parameter -


i have c method interface

size_t foo(uint8_t ** output)

this gets imported swift as

func foo(_ output: unsafemutablepointer<unsafemutablepointer<uint8>>) -> int

how can call method swift?

assuming foo() allocates uint8_t array, puts address memory location pointed output, , returns size of allocated array, can use swift this

var output : unsafemutablepointer<uint8> = nil let size = foo(&output) in 0 ..< size {     println(output[i]) }

you have decide responsible releasing allocated memory. if foo() functions allocates using malloc() can release swift with

free(output)

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