106 lines
2.8 KiB
JavaScript
106 lines
2.8 KiB
JavaScript
function write_zip(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes*/ {
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var _opts = options || {};
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var out = [], cdirs = [];
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var o/*:CFBlob*/ = new_buf(1);
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var method = (_opts.compression ? 8 : 0), flags = 0;
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var desc = false;
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if(desc) flags |= 8;
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var i = 0, j = 0;
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var start_cd = 0, fcnt = 0;
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var root = cfb.FullPaths[0], fp = root, fi = cfb.FileIndex[0];
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var crcs = [];
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var sz_cd = 0;
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for(i = 1; i < cfb.FullPaths.length; ++i) {
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fp = cfb.FullPaths[i].slice(root.length); fi = cfb.FileIndex[i];
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if(!fi.size || !fi.content || fp == "\u0001Sh33tJ5") continue;
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var start = start_cd;
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/* TODO: CP437 filename */
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var namebuf = new_buf(fp.length);
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for(j = 0; j < fp.length; ++j) namebuf.write_shift(1, fp.charCodeAt(j) & 0x7F);
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namebuf = namebuf.slice(0, namebuf.l);
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crcs[fcnt] = CRC32.buf(/*::((*/fi.content/*::||[]):any)*/, 0);
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var outbuf = fi.content/*::||[]*/;
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if(method == 8) outbuf = _deflateRawSync(outbuf);
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/* local file header */
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o = new_buf(30);
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o.write_shift(4, 0x04034b50);
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o.write_shift(2, 20);
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o.write_shift(2, flags);
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o.write_shift(2, method);
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/* TODO: last mod file time/date */
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if(fi.mt) write_dos_date(o, fi.mt);
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else o.write_shift(4, 0);
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o.write_shift(-4, (flags & 8) ? 0 : crcs[fcnt]);
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o.write_shift(4, (flags & 8) ? 0 : outbuf.length);
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o.write_shift(4, (flags & 8) ? 0 : /*::(*/fi.content/*::||[])*/.length);
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o.write_shift(2, namebuf.length);
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o.write_shift(2, 0);
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start_cd += o.length;
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out.push(o);
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start_cd += namebuf.length;
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out.push(namebuf);
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/* TODO: extra fields? */
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/* TODO: encryption header ? */
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start_cd += outbuf.length;
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out.push(outbuf);
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/* data descriptor */
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if(flags & 8) {
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o = new_buf(12);
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o.write_shift(-4, crcs[fcnt]);
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o.write_shift(4, outbuf.length);
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o.write_shift(4, /*::(*/fi.content/*::||[])*/.length);
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start_cd += o.l;
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out.push(o);
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}
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/* central directory */
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o = new_buf(46);
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o.write_shift(4, 0x02014b50);
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o.write_shift(2, 0);
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o.write_shift(2, 20);
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o.write_shift(2, flags);
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o.write_shift(2, method);
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o.write_shift(4, 0); /* TODO: last mod file time/date */
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o.write_shift(-4, crcs[fcnt]);
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o.write_shift(4, outbuf.length);
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o.write_shift(4, /*::(*/fi.content/*::||[])*/.length);
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o.write_shift(2, namebuf.length);
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o.write_shift(2, 0);
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o.write_shift(2, 0);
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o.write_shift(2, 0);
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o.write_shift(2, 0);
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o.write_shift(4, 0);
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o.write_shift(4, start);
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sz_cd += o.l;
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cdirs.push(o);
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sz_cd += namebuf.length;
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cdirs.push(namebuf);
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++fcnt;
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}
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/* end of central directory */
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o = new_buf(22);
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o.write_shift(4, 0x06054b50);
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o.write_shift(2, 0);
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o.write_shift(2, 0);
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o.write_shift(2, fcnt);
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o.write_shift(2, fcnt);
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o.write_shift(4, sz_cd);
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o.write_shift(4, start_cd);
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o.write_shift(2, 0);
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return bconcat(([bconcat((out/*:any*/)), bconcat(cdirs), o]/*:any*/));
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}
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