These_are_miscellaneous_tests_of_my_own_division.
_
hello_world
The_quick_brown_fox_jumps_over_the_lazy_doggerel.txt
___well_____then_____.____how__about_____this_____
Once_upon_a_time_there_was_a_file_name_sanitiser;_it_was_a_good_file_name_sanitiser,_and_never_exposed_security_vulnerabilities_to_the_World._“It’s_a_dangerous_place,”_its_grand._“If_a_wolf_should_come_out_of_the_forest,_then_what_would_you_do_”
(Some_Peter_and_the_Wolf_snuck_in_there.)
.hidden
C:_WINDOWS_system32_driver_etc_hosts
_WINDIR__system32_driver_etc_hosts
Kinda_funny_how_Windows_has_a__etc_hosts.
_
_
...
....
_._._._._._._
__._.._._._._..__.._
I’m_basically_just_typing_random_stuff_here.
OK,_time_for_some_more_serious_stuff.
_
For_Unicode_paths,_some_file_systems_limit_paths_to_roughly_255_UTF-8_code_units,_others_to_roughly_255_UTF-16_code_units._UTF-8_is_the_tighter_of_these_restrictions_in_all_circumstances:_UTF-16_uses_one_code_unit_until_U+F._Now_then:_one-byte_characters:
__One-byte_characters:
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345
12345678901234567890.abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678.abcdefghijklmnopqrstuvwxyz
__Two-byte_characters:
áɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠ.
áɓç.°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³
áɓçđéƒɠ.°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³
áɓçđéƒɠɦïķá.°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³°¹²³
áɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓçđéƒɠɦïķáɓç.°¹²³
__Three-byte_characters:
‐‑‒–—―‖‗‘’‚‛“”„‟†‡•‣․‥…‧‐‑‒–—―‖‗‘’‚‛“”„‟†‡•‣․‥…‧‐‑‒–—―‖‗‘’‚‛“”„‟†‡•‣․‥…‧‐‑‒–—―‖‗‘’‚‛“
‐‑‒–—.₁₂₃₄₅₆₇₈₉₀₁₂₃₄₅₆₇₈₉₀₁₂₃₄₅₆₇₈₉₀₁₂₃₄₅₆₇₈₉₀₁₂₃₄₅₆₇₈₉₀₁₂₃₄₅₆₇₈₉₀₁₂₃₄₅₆₇₈₉₀₁₂₃₄₅₆₇₈₉
‐‑‒–—―‖‗‘’‚‛“”„‟†‡•‣․‥…‧‐‑‒–—―‖‗‘’‚‛“”„‟†‡•‣․‥…‧‐‑‒–—―‖‗‘’‚‛“”„‟†‡•‣․‥…‧‐‑.₁₂₃₄₅₆₇₈₉₀
__Four-byte_characters:
𐀀𐀁𐀂𐀃𐀄𐀅𐀆𐀇𐀈𐀉𐀊𐀋𐀍𐀎𐀏𐀐𐀑𐀒𐀓𐀔𐀕𐀖𐀗𐀘𐀙𐀚𐀛𐀜𐀝𐀞𐀟𐀠𐀡𐀢𐀣𐀤𐀥𐀦𐀨𐀩𐀪𐀫𐀬𐀭𐀮𐀯𐀰𐀱𐀲𐀳𐀴𐀵𐀶𐀷𐀸𐀹𐀺𐀼𐀽𐀿𐁀𐁁𐁂.
𐀀𐀁𐀂𐀃𐀄𐀅𐀆.𐂀𐂁𐂂𐂃𐂄𐂅𐂆𐂇𐂈𐂉𐂊𐂋𐂌𐂍𐂀𐂁𐂂𐂃𐂄𐂅𐂆𐂇𐂈𐂉𐂊𐂋𐂌𐂍𐂀𐂁𐂂𐂃𐂄𐂅𐂆𐂇𐂈𐂉𐂊𐂋𐂌𐂍𐂀𐂁𐂂𐂃𐂄𐂅𐂆𐂇𐂈𐂉𐂊𐂋𐂌𐂍
𐀀𐀁𐀂𐀃𐀄𐀅𐀆𐀇𐀈𐀉𐀊𐀋𐀍𐀎𐀏𐀐𐀑𐀒𐀓𐀔𐀕𐀖𐀗𐀘𐀙𐀚𐀛𐀜𐀝𐀞𐀟𐀠𐀡𐀢𐀣𐀤𐀥𐀦𐀨𐀩𐀪𐀫𐀬𐀭𐀮𐀯𐀰𐀱𐀲.𐂀𐂁𐂂𐂃𐂄𐂅𐂆𐂇𐂈𐂉𐂊𐂋𐂌𐂍
_
abcdef.ghij
abcde.fghij
AUX.abcdef
lpT7.abcdef
cOm6.abcdef
CON
aux.h
Lpt1.exe
xyz
nül
COM1.jpg.png
_
Some_sanitisers_try_stripping_out_ZWSP_(​),_which_can_be_used_as_a_fingerprinting_vector_and_has_no_particularly_legitimate_purpose_in_a_file_name;_I’m_not,_because_removing_it_doesn’t_solve_the_fingerprinting_risk,_as_you_can_use_ZWNJ_and_ZWJ_(.)