Interop file for using libnode from Golang.

interop.go

package interop

/*
#cgo CFLAGS: -I${SRCDIR}/../
#cgo LDFLAGS: -L${SRCDIR}/../ -lhello
#include <stdlib.h>
#include <string.h>
#include <node_c.h>

static char** create_argv_array(int array_size) {
	char** argv = calloc(sizeof(char*), array_size);

	return argv;
}

// libuv requires that argv memory is adjacent
static char* create_argv_placeholder(int total_length) {
	char* placeholder = calloc(sizeof(char), total_length);
	return placeholder;
}

static char* set_argv_string(char** argv, int index, char* cursor, char* str) {
	argv[index] = cursor;
	strcpy(cursor, str);
	return cursor + strlen(str) + 1;
}
*/
import "C"

func NodeMain(argv []string) {
	argc := C.int(len(argv))
	args := C.create_argv_array(argc)

	var totalLength int
	for _, s := range argv {
		totalLength += len(s)
	}

	cursor := C.create_argv_placeholder(C.int(totalLength))

	for i, s := range argv {
		cursor = C.set_argv_string(args, C.int(i), cursor, C.CString(s))
	}

	C.node_start(argc, args)
}