diff options
| author | Jacob Abel <jacobabel@nullpo.dev> | 2022-05-21 22:34:11 -0400 |
|---|---|---|
| committer | Jacob Abel <jacobabel@nullpo.dev> | 2022-10-23 17:50:20 -0400 |
| commit | febff1dccd2c173472fe4a6bed2e620429c5b1ba (patch) | |
| tree | 4d66beccb6704f2f897b5de7afcf22aa3d8ca70b /lib | |
| parent | 86ad681303d9bc567cca762b239f3fde0b951d64 (diff) | |
lib/strings: allow toInt to parse zero-padded strings
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/strings.nix | 20 | ||||
| -rw-r--r-- | lib/tests/misc.nix | 28 |
2 files changed, 44 insertions, 4 deletions
diff --git a/lib/strings.nix b/lib/strings.nix index be217cb06469..8f3568fc1fc5 100644 --- a/lib/strings.nix +++ b/lib/strings.nix @@ -792,15 +792,27 @@ rec { => 1337 toInt "-4" => -4 + toInt " 123 " + => 123 + toInt "00024" + => 24 toInt "3.14" => error: floating point JSON numbers are not supported */ # Obviously, it is a bit hacky to use fromJSON this way. toInt = str: - let may_be_int = fromJSON str; in - if isInt may_be_int - then may_be_int - else throw "Could not convert ${str} to int."; + let + strippedInput = match "[[:space:]]*(0*)(.*)" str; + isNonZeroEmpty = match "[[:space:]]*" (lib.last strippedInput) == []; + isZeroNonEmpty = head strippedInput != ""; + mayBeInt = fromJSON (lib.last strippedInput); + in + if isNonZeroEmpty && isZeroNonEmpty + then 0 + else + if isInt mayBeInt + then mayBeInt + else throw "Could not convert ${str} to int."; /* Read a list of paths from `file`, relative to the `rootPath`. Lines beginning with `#` are treated as comments and ignored. diff --git a/lib/tests/misc.nix b/lib/tests/misc.nix index 8e0cf1f45bb6..ef4483219f7e 100644 --- a/lib/tests/misc.nix +++ b/lib/tests/misc.nix @@ -327,6 +327,34 @@ runTests { expected = "Hello\\x20World"; }; + testToInt = testAllTrue [ + # Naive + (123 == toInt "123") + (0 == toInt "0") + # Whitespace Padding + (123 == toInt " 123") + (123 == toInt "123 ") + (123 == toInt " 123 ") + (123 == toInt " 123 ") + (0 == toInt " 0") + (0 == toInt "0 ") + (0 == toInt " 0 ") + # Zero Padding + (123 == toInt "0123") + (123 == toInt "0000123") + (0 == toInt "000000") + # Whitespace and Zero Padding + (123 == toInt " 0123") + (123 == toInt "0123 ") + (123 == toInt " 0123 ") + (123 == toInt " 0000123") + (123 == toInt "0000123 ") + (123 == toInt " 0000123 ") + (0 == toInt " 000000") + (0 == toInt "000000 ") + (0 == toInt " 000000 ") + ]; + # LISTS testFilter = { |