Manage empty values

[rcorredera]

I find out some values can be empty, so I changed the Regex to manage this case.

[RX14]

{0, 1} can be replaced by ?.

[alexanderturinske]

@fresc81

[cwalther]

I just ran into the same bug, however your solution does not work for me. It gives me undefined instead of the expected empty string for empty REG_SZ values. It also still doesn’t properly handle names and values that start or end with spaces.

My version of reg.exe (10.0.18362.476) appears to use exactly four spaces as delimiters, so this works for me (in combination with removing some unjustified trim()s):

ITEM_PATTERN  = /^    (.*)    (REG_SZ|REG_MULTI_SZ|REG_EXPAND_SZ|REG_DWORD|REG_QWORD|REG_BINARY|REG_NONE)    (.*?)[\r\n]*$/

That is, until we get into the territory of names and values containing <space><space><space><space>REG_SZ and the like, in which case all bets are off because the output of reg.exe becomes ambiguous.