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Use local functions instead of anonymous functions for gsub (less GC overhead)

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dmiller
2020-11-30 23:22:06 +00:00
parent c8fdcd80b5
commit 86deb87187
5 changed files with 69 additions and 43 deletions
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7
nselib/stringaux.lua
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@@ -70,6 +70,9 @@ end
-- This pattern must match the percent sign '%' since it is used in
-- escaping.
local FILESYSTEM_UNSAFE = "[^a-zA-Z0-9._-]"
local function _escape_helper (c)
return format("%%%02x", byte(c))
end
---
-- Escape a string to remove bytes and strings that may have meaning to
-- a filesystem, such as slashes.
@@ -97,9 +100,7 @@ function filename_escape(s)
elseif s == ".." then
return "%2e%2e"
else
return (gsub(s, FILESYSTEM_UNSAFE, function (c)
return format("%%%02x", byte(c))
end))
return (gsub(s, FILESYSTEM_UNSAFE, _escape_helper))
end
end