tinygo/testdata/cgo
Ayke van Laethem 5c0a337c4f cgo: implement rudimentary C array decaying
This is just a first step. It's not complete, but it gets some real
world C code to parse.

This signature, from the ESP-IDF:

    esp_err_t esp_wifi_get_mac(wifi_interface_t ifx, uint8_t mac[6]);

Was previously converted to something like this (pseudocode):

    C.esp_err_t esp_wifi_get_mac(ifx C.wifi_interface_t, mac [6]uint8)

But this is not correct. C array parameters will decay. The array is
passed by reference instead of by value. Instead, this would be the
correct signature:

    C.esp_err_t esp_wifi_get_mac(ifx C.wifi_interface_t, mac *uint8)

So that it can be called like this (using CGo):

    var mac [6]byte
    errCode := C.esp_wifi_get_mac(C.ESP_IF_WIFI_AP, &mac[0])

This stores the result in the 6-element array mac.
2021-09-29 13:38:33 +02:00
..
extra.go cgo: refactor; support multiple cgo files in a single package 2019-05-12 10:49:15 +02:00
main.c cgo: implement rudimentary C array decaying 2021-09-29 13:38:33 +02:00
main.go cgo: implement rudimentary C array decaying 2021-09-29 13:38:33 +02:00
main.h cgo: implement rudimentary C array decaying 2021-09-29 13:38:33 +02:00
out.txt builder, cgo: support function definitions in CGo headers 2021-09-28 18:44:11 +02:00