将带有字符串数组的glib C方法作为参数转换为Go

Question

我正在尝试向gotk3/glib Go存储库添加一些方法，但是我遇到了将方法g_settings_set_strv转换为Go的麻烦; C签名是这样的：

gboolean
g_settings_set_strv (GSettings *settings,
                     const gchar *key,
                     const gchar *const *value);

这就是我在Go中所拥有的（改编后的复制粘贴，我不是C人，只有Java，Python等）：

// SetStrv is a wrapper around g_settings_set_strv().
func (v *Settings) SetStrv(name string, values []string) bool {
    cstr1 := (*C.gchar)(C.CString(name))
    defer C.free(unsafe.Pointer(cstr1))

    cvalues := C.make_strings(C.int(len(values) + 1))
    defer C.destroy_strings(cvalues)

    for i, accel := range values {
        cstr := C.CString(accel)
        defer C.free(unsafe.Pointer(cstr))
        C.set_string(cvalues, C.int(i), (*C.gchar)(cstr))
    }
    C.set_string(cvalues, C.int(len(values)), nil)
    return gobool(C.g_settings_set_strv(v.native(), cstr1, cvalues))
}

但构建失败并显示以下消息：

./settings.go:246: cannot use (*C.gchar)(cstr) (type *C.gchar) as type *C.char in argument to func literal
./settings.go:249: cannot use cvalues (type **C.char) as type **C.gchar in argument to func literal

我被困在这...

Answer 1

此代码可以正常工作并执行以下操作：

// SetStrv is a wrapper around g_settings_set_strv().
func (v *Settings) SetStrv(name string, values []string) bool {
    cstr1 := (*C.gchar)(C.CString(name))
    defer C.free(unsafe.Pointer(cstr1))

    // cvalues := C.make_strings(C.int(len(values) + 1))
    cvalues := make([]*C.gchar, len(values))

    for i, accel := range values {
        cvalues[i] = (*C.gchar)(C.CString(accel))
        defer C.free(unsafe.Pointer(cvalues[i]))
    }
    cvalues = append(cvalues, nil)

    // C.set_string(cvalues, C.int(len(values)), nil)
    return gobool(C.g_settings_set_strv(v.native(), cstr1, &cvalues[0]))
}

感谢tommyshem from github的帮助（commit fix）。