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rex.new = rex.newPOSIX
util = {}
function util.grep(expr, filename)
if not posix.stat(filename, "mode") then
return nil
end
local lines = {}
local pat = rex.new(expr)
local pos = 1
for line in io.lines(filename) do
if pat:match(line) then
table.insert(lines, pos, line)
end
pos = pos + 1
end
if table.getn(lines) == 0 then
return nil
end
return lines
end
function util.igrep(expr, filename)
return ipairs(rex.grep(expr, filename))
end
function util.bgrep(expr, filename)
if not posix.stat(filename, "mode") then
return nil
end
local pat = rex.new(expr)
for line in io.lines(filename) do
if pat:match(line) then
return true
end
end
return false
end
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