// TypeByFile looks up for a file's mimetype by its content.
// It uses a magic number database which is described in magic(5).
func (d *Decoder) TypeByFile(filename string) (string, error) {
path := C.CString(filename)
defer C.free(unsafe.Pointer(path))
out := C.magic_file(d.db, path)
if out == nil {
return "", errors.New(C.GoString(C.magic_error(d.db)))
}
return C.GoString(out), nil
}
// TypeByFile looks up for a file's mimetype by its content.
// It uses a magic number database which is described in magic(5).
func (m *Magic) TypeByFile(filePath string) (string, error) {
path := C.CString(filePath)
defer C.free(unsafe.Pointer(path))
out := C.magic_file(m.db, path)
if out == nil {
return "", errors.New(C.GoString(C.magic_error(m.db)))
}
return C.GoString(out), nil
}
// File returns a textual description of the contents of the filename argument.
// If the filename is nil, then stdin is used.
func (m *Magic) File(file string) (string, error) {
if m.ptr == nil {
return "", ConnectionError
}
cf := C.CString(file)
defer C.free(unsafe.Pointer(cf))
cr := C.magic_file(m.ptr, cf)
if cr == nil {
return "", m.check()
}
r := C.GoString(cr)
C.free(unsafe.Pointer(cr))
return r, nil
}
// File returns a textual description of the contents of the filename argument.
// If the filename is nil, then stdin is used.
func (m *Magic) File(file string) (string, error) {
if m.ptr == nil {
return "", ConnectionError
}
cf := C.CString(file)
defer C.free(unsafe.Pointer(cf))
cr := C.magic_file(m.ptr, cf)
if cr == nil {
return "", m.check()
}
// The cr pointer is tracked by the Magic Cookie
// and does not need to be freed here. Doing so
// causes an error when Close() is called because
// a free attempt is made against an item that has
// already been freed.
r := C.GoString(cr)
return r, nil
}
func File(cookie Magic_t, filename string) string {
cfilename := C.CString(filename)
defer C.free(unsafe.Pointer(cfilename))
return C.GoString(C.magic_file(cookie, cfilename))
}