From f9ea03470e3a0bbe67ccb0a531dcf0e39aec1e90 Mon Sep 17 00:00:00 2001 From: Aqua-sama Date: Mon, 30 Mar 2020 14:08:41 +0300 Subject: Move scripts/rcc to top level - add rcc generator for use when importing as subproject --- rcc_format/zstd.py | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 rcc_format/zstd.py (limited to 'rcc_format/zstd.py') diff --git a/rcc_format/zstd.py b/rcc_format/zstd.py new file mode 100644 index 0000000..34eeb64 --- /dev/null +++ b/rcc_format/zstd.py @@ -0,0 +1,43 @@ +import subprocess +from rcc_format.util import * + +def zstd(filelist, args): + if args.train is not None: + train(filelist, args.train, args.binary, args.dsize) + return + + write_header(args.output, args.namespace) + + for f in filelist: + with open(f.path, 'rb') as contents: + write_item(args.output, f.variable, compress(contents, args.binary, args.level, dictionary=args.dict)) + + write_entries(args.output, filelist) + if args.dict is not None: + write_item(args.output, 'dict', args.dict.read()) + print("constexpr auto dictionary = std::span(dict, dict_len);", file=args.output) + else: + print("constexpr std::span dictionary {};", file=args.output) + + print("constexpr auto compression = embed::Zstd;", file=args.output) + + write_footer(args.output, args.namespace) + +def train(filelist, output, zstd_bin, maxdict): + cmd = [ zstd_bin, '--train', '--maxdict=' + str(maxdict), '-o', output.name ] + + for f in filelist: + cmd.append(f.path) + + subprocess.run(cmd) + +def compress(file, zstd_bin, level, dictionary=None): + cmd = [ zstd_bin, '--compress', '--stdout', '-' + str(level) ] + + if dictionary is not None: + cmd.append('-D') + cmd.append(dictionary.name) + + cmd.append(file.name) + return subprocess.run(cmd, capture_output=True).stdout + -- cgit v1.2.1