def test_make_8dot3_name_cut_ext():
"""Test that make_8dot3_filename generates valid 8dot3 filenames."""
fde = mock.MagicMock()
fde.get_entries.return_value = ([], [], [])
sfn = EightDotThree()
lfn = sfn.make_8dot3_name("This is a long filename.TeXT", fde)
assert "THISIS.TEX" == lfn
assert sfn.is_8dot3_conform(lfn)
def test_make_8dot3_name():
"""Test that make_8dot3_filename generates valid 8dot3 filenames."""
fde = mock.MagicMock()
fde.get_entries.return_value = ([], [], [])
sfn = EightDotThree()
n = sfn.make_8dot3_name("This is a long filename.txt", fde)
sfn.set_str_name(n)
assert "THISIS.TXT" == n
assert sfn.is_8dot3_conform(sfn.get_unpadded_filename())
def test_make_8dot3_name_collision():
"""Test that make_8dot3_filename generates valid 8dot3 filenames."""
fde = mock.MagicMock()
fde_sub = mock.MagicMock()
fde_sub.get_short_name.side_effect = [
"THISIS.TXT", "THISIS~1.TXT", "THISIS~2.TXT"
]
fde.get_entries.return_value = ([fde_sub, fde_sub], [fde_sub], [])
sfn = EightDotThree()
lfn = sfn.make_8dot3_name("This is a long filename.txt", fde)
assert "THISIS~3.TXT" == lfn
assert sfn.is_8dot3_conform(lfn)
def test_is_8dot3_conform_false():
"""Test that non-8.3 file names are correctly detected."""
assert not EightDotThree.is_8dot3_conform("This is a Long file.txt")
def test_is_8dot3_conform_true():
"""Test that 8.3 file names are correctly detected."""
assert EightDotThree.is_8dot3_conform("TESTFILE.TXT")
def make_lfn_entry(dir_name: str,
short_name):
"""Generate a `FATLongDirectoryEntry` instance from directory name.
:param dir_name: Long name of directory
:param short_name: `EightDotThree` class instance
:raises PyFATException if entry name does not require an LFN
entry or the name exceeds the FAT limitation of 255 characters
"""
lfn_entry = FATLongDirectoryEntry()
#: Length in bytes of an LFN entry
lfn_entry_length = 26
dir_name_str = dir_name
dir_name = dir_name.encode(FAT_LFN_ENCODING)
dir_name_modulus = len(dir_name) % lfn_entry_length
if EightDotThree.is_8dot3_conform(dir_name_str):
raise PyFATException("Directory entry is already 8.3 conform, "
"no need to create an LFN entry.",
errno=errno.EINVAL)
if len(dir_name) > 255:
raise PyFATException("Long file name exceeds 255 "
"characters, not supported.",
errno=errno.ENAMETOOLONG)
checksum = short_name.checksum()
if dir_name_modulus != 0:
# Null-terminate string if required
dir_name += '\0'.encode(FAT_LFN_ENCODING)
# Fill the rest with 0xFF if it doesn't fit evenly
new_sz = lfn_entry_length - len(dir_name)
new_sz %= lfn_entry_length
new_sz += len(dir_name)
dir_name += b'\xFF' * (new_sz - len(dir_name))
# Generate linked LFN entries
lfn_entries = len(dir_name) // lfn_entry_length
for i in range(lfn_entries):
if i == lfn_entries-1:
lfn_entry_ord = 0x40 | i+1
else:
lfn_entry_ord = i+1
n = i*lfn_entry_length
dirname1 = dir_name[n:n+10]
n += 10
dirname2 = dir_name[n:n+12]
n += 12
dirname3 = dir_name[n:n+4]
lfn_entry.add_lfn_entry(LDIR_Ord=lfn_entry_ord,
LDIR_Name1=dirname1,
LDIR_Attr=FATDirectoryEntry.ATTR_LONG_NAME,
LDIR_Type=0x00,
LDIR_Chksum=checksum,
LDIR_Name2=dirname2,
LDIR_FstClusLO=0,
LDIR_Name3=dirname3)
return lfn_entry