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61 lines
1.2 KiB
Ruby
Executable File
61 lines
1.2 KiB
Ruby
Executable File
#!/usr/bin/ruby
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@out_bytes = []
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@offset_map = {}
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@nentries_offset = 4
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def usage
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abort("Usage: #{$0} <outfile> <infile> [<infile> ...]")
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end
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def new_romfs
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@out_bytes = [0x4D, 0x47, 0x46, 0x53, 0x00]
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end
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def set_int32(offset, num)
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@out_bytes[offset+0] = num & 0xFF
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@out_bytes[offset+1] = num >> 8 & 0xFF
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@out_bytes[offset+2] = num >> 16 & 0xFF
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@out_bytes[offset+3] = num >> 24 & 0xFF
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end
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def add_int32(num)
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@out_bytes += [num & 0xFF]
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@out_bytes += [num >> 8 & 0xFF]
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@out_bytes += [num >> 16 & 0xFF]
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@out_bytes += [num >> 24 & 0xFF]
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end
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def add_file_header(name, size)
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@offset_map[name] = @out_bytes.length
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add_int32(0) # offset
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add_int32(size)
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@out_bytes += [name.length]
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@out_bytes += name.bytes
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@out_bytes[@nentries_offset] += 1
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end
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outfile = ARGV.shift || usage
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usage if ARGV.empty?
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abort("Too many files (>15)") if ARGV.count > 255
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new_romfs
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ARGV.each do |name|
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if File.file?(name)
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add_file_header(name, File.size(name))
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else
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puts "skipping #{name} - not a regular file"
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end
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end
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@offset_map.each_pair do |name, offset|
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set_int32(offset, @out_bytes.length)
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data = File.read(name)
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@out_bytes += data.bytes
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end
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File.write(outfile, @out_bytes.map(&:chr).join)
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