doc: add code samples from uvbook (unadapted)

PR-URL: https://github.com/libuv/libuv/pull/1246
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/docs/code/interfaces/main.c b/docs/code/interfaces/main.c
new file mode 100644
index 00000000..cac12c26
--- /dev/null
+++ b/docs/code/interfaces/main.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <uv.h>
+
+int main() {
+    char buf[512];
+    uv_interface_address_t *info;
+    int count, i;
+
+    uv_interface_addresses(&info, &count);
+    i = count;
+
+    printf("Number of interfaces: %d\n", count);
+    while (i--) {
+        uv_interface_address_t interface = info[i];
+
+        printf("Name: %s\n", interface.name);
+        printf("Internal? %s\n", interface.is_internal ? "Yes" : "No");
+        
+        if (interface.address.address4.sin_family == AF_INET) {
+            uv_ip4_name(&interface.address.address4, buf, sizeof(buf));
+            printf("IPv4 address: %s\n", buf);
+        }
+        else if (interface.address.address4.sin_family == AF_INET6) {
+            uv_ip6_name(&interface.address.address6, buf, sizeof(buf));
+            printf("IPv6 address: %s\n", buf);
+        }
+
+        printf("\n");
+    }
+
+    uv_free_interface_addresses(info, count);
+    return 0;
+}