blob: d860375e2622c66b1c6a56a0dee80b6d16167d99 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
if arg[1] == '--help' then
print('Usage:')
print(' gencharblob.lua source target varname')
print('')
print('Generates C file with big uint8_t blob.')
print('Blob will be stored in a static const array named varname.')
os.exit()
end
assert(#arg == 3)
local source_file = arg[1]
local target_file = arg[2]
local varname = arg[3]
source = io.open(source_file, 'r')
target = io.open(target_file, 'w')
target:write('#include <stdint.h>\n\n')
target:write(('static const uint8_t %s[] = {\n'):format(varname))
num_bytes = 0
MAX_NUM_BYTES = 15 -- 78 / 5: maximum number of bytes on one line
target:write(' ')
increase_num_bytes = function()
num_bytes = num_bytes + 1
if num_bytes == MAX_NUM_BYTES then
num_bytes = 0
target:write('\n ')
end
end
for line in source:lines() do
for i = 1,string.len(line) do
byte = string.byte(line, i)
assert(byte ~= 0)
target:write(string.format(' %3u,', byte))
increase_num_bytes()
end
target:write(string.format(' %3u,', string.byte('\n', 1)))
increase_num_bytes()
end
target:write(' 0};\n')
source:close()
target:close()
|
