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128 lines
3.7 KiB
128 lines
3.7 KiB
function trim(s)
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return (s:gsub("^%s*(.-)%s*$", "%1"))
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end
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function split_fmt(f)
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if not type(f) == "string" then
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io.stderr:write("ERROR! Argument '" .. format .. "' is not a string.")
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return nil
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end
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local ret = {}
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local curr = ""
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local in_spec = false
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for char in string.gmatch(f, ".") do
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if in_spec then
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if string.match(char, '[cdEefgiouXx]') then
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curr = curr .. char
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table.insert(ret, curr)
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in_spec = false
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curr = ""
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elseif string.match(char, '[qs]') then
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if string.match(curr, '^%%%-?[0-9]*$') then
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curr = curr .. char
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table.insert(ret, curr)
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in_spec = false
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curr = ""
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else
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io.stderr:write("Invalid format: '" .. curr .. char .. "'\n")
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return nil
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end
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elseif string.match(char, '[0-9%.%-]') then
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curr = curr .. char
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elseif string.match(char, '%%') then
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if string.match(curr, '^%%') then
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curr = curr .. char
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table.insert(ret, curr)
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in_spec = false
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curr = ""
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else
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io.stderr:write("Invalid format: '" .. curr .. char .. "'\n")
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return nil
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end
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else
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io.stderr:write("Invalid format: '" .. curr .. char .. "'\n")
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return nil
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end
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else
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if char == '%' then
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in_spec = true
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if curr ~= "" then
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table.insert(ret, curr)
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end
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curr = char
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else
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curr = curr .. char
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end
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end
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end
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if curr ~= "" then
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table.insert(ret, curr)
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end
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return ret
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end
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function table_length(t)
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local count = 0
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for _ in pairs(t) do
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count = count + 1
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end
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return count
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end
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function count_formats(formats)
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if type(formats) ~= 'table' then
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io.stderr:write("ERROR! formats is not a table.\n")
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return nil
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end
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local count = 0
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for i,v in ipairs(formats) do
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if string.match(v, '^%%') and not string.match(v, '%%$') then
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count = count + 1
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end
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end
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return count
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end
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function is_fmt_spec(str)
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return string.match(str, "^%%")
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end
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function conky_printf(format, ...)
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formats = split_fmt(format)
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values = {...}
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if count_formats(formats) ~= table_length(values) then
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io.stderr:write("ERROR! Number of format specifiers to printf doesn't match the number of values passed.\n")
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return nil
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end
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local parsed_values = {}
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for i,v in ipairs(values) do
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parsed_values[i] = conky_parse(v)
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end
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for i,fs in ipairs(formats) do
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if is_fmt_spec(fs) then -- we have a format specifier
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if string.match(fs, '[cdEefgiouXx]$') then -- we have a numeric format specifier, convert value to number
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parsed_values[i] = tonumber(trim((parsed_values[i])))
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end
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end
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end
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local formatted_output = ""
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local idx = 1
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for i,fs in ipairs(formats) do
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if is_fmt_spec(fs) then
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if not string.match(fs, '%%$') then
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formatted_output = formatted_output .. string.format(fs, parsed_values[idx])
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idx = idx + 1
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else
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formatted_output = formatted_output .. '%'
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end
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else
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formatted_output = formatted_output .. fs
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end
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end
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return formatted_output
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end
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