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49 lines
1.1 KiB
Lua
49 lines
1.1 KiB
Lua
if arg[1] == '--help' then
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print('Usage:')
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print(' gencharblob.lua source target varname')
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print('')
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print('Generates C file with big uint8_t blob.')
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print('Blob will be stored in a static const array named varname.')
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os.exit()
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end
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assert(#arg == 3)
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local source_file = arg[1]
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local target_file = arg[2]
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local varname = arg[3]
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source = io.open(source_file, 'r')
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target = io.open(target_file, 'w')
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target:write('#include <stdint.h>\n\n')
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target:write(('static const uint8_t %s[] = {\n'):format(varname))
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num_bytes = 0
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MAX_NUM_BYTES = 15 -- 78 / 5: maximum number of bytes on one line
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target:write(' ')
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increase_num_bytes = function()
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num_bytes = num_bytes + 1
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if num_bytes == MAX_NUM_BYTES then
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num_bytes = 0
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target:write('\n ')
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end
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end
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for line in source:lines() do
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for i = 1,string.len(line) do
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byte = string.byte(line, i)
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assert(byte ~= 0)
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target:write(string.format(' %3u,', byte))
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increase_num_bytes()
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end
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target:write(string.format(' %3u,', string.byte('\n', 1)))
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increase_num_bytes()
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end
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target:write(' 0};\n')
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source:close()
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target:close()
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