-- added for compatibility with PSP Lua Player
-- table functions
function tinsert(t, p, v)
 return table.insert(t, p, v)
end

function tinsert(t, v)
 return table.insert(t, v)
end

function tremove(t)
 return table.remove(t)
end

function tremove(t, pos)
 return table.remove(t, pos)
end

-- string functions
function strlower(s)
 return string.lower(s)
end

function strfind(s, pattern)
 return string.find(s, pattern)
end

function strfind(s, pattern, init)
 return string.find(s, pattern, init)
end

function strfind(s, pattern, init, plain)
 return string.find(s, pattern, init, plain)
end

function strsub(s, i)
 return string.sub(s, i)
end

function strsub(s, i, j)
 return string.sub(s, i, j)
end

function gsub(s, pat, repl)
 return string.gsub(s, pat, repl)
end

function gsub(s, pat, repl, n)
 return string.gsub(s, pat, repl, n)
end