95 lines
2.1 KiB
Lua
95 lines
2.1 KiB
Lua
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-- Usage:
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-- lua auto.lua <name1> <name2> .. <nameN>
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--
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-- Example:
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-- lua auto.lua boot graphics
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local max_width = 18
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local pattern = [[
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// [%s]
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const char %s[] =
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{
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%s
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}; // [%s]
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]]
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--formatting parameters:
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-- - input file name
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-- - c variable name
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-- - array contents
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-- - input file name
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function auto(name)
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--the input file name
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local src = name .. ".lua"
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--and the output one
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local dst = name .. ".lua.h"
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--the name of the variable
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local cpp_name = name .. "_lua"
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--do a minimal code check
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--(syntax errors, really)
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loadfile(src)
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--no error catching? no
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--we have the main loop doing that for us
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--what character is this on this line?
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local counter = 0
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local function tohex(c)
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counter = counter + 1
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--if we've reached the maximum width (or 0)
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--then we'll carry on and add a newline
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if counter % max_width == 0 then
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return ("\n\t0x%02x, "):format(c:byte())
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end
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--otherwise we just use the hex of the current byte
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return ("0x%02x, "):format(c:byte())
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end
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--let's open the input file
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local src_file = io.open(src, "rb")
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--create an output string
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local out_data = ""
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--go through the input file line-by-line
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for line in src_file:lines() do
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--if the line is non-empty
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if #line > 0 then
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--set the counter to -1
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--this will start a new line (see tohex)
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counter = -1
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--append the output to what we had, plus a newline character (0x0a is newline)
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out_data = ("%s%s0x0a,"):format(out_data, line:gsub("\r", ""):gsub(".", tohex))
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end
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end
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--close our input
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src_file:close()
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--open, write and close the output
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out_file = io.open(dst, "wb")
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--see pattern above
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out_file:write(pattern:format(src, cpp_name, out_data, src))
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out_file:close()
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--tell the world we succeeded!
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print(name .. ": Success")
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end
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--usage
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if #arg == 0 then
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return print("Usage: lua auto.lua <name1> <name2> .. <name3>")
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end
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--the 'main' procedure
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for i, v in ipairs(arg) do
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--run the auto function for every argument
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--but do it with pcall, to catch errors
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v = v:gsub("%.lua$", ""):gsub("^(.+)/", "") -- normalize input
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local ok, err = pcall(auto, v)
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if not ok then
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--inform people we've failed
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print(v .. ": " .. err)
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end
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end
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