forked from sheetjs/sheetjs
117 lines
5.0 KiB
JavaScript
117 lines
5.0 KiB
JavaScript
function firstbyte(f/*:RawData*/,o/*:?TypeOpts*/)/*:Array<number>*/ {
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var x = "";
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switch((o||{}).type || "base64") {
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case 'buffer': return [f[0], f[1], f[2], f[3], f[4], f[5], f[6], f[7]];
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case 'base64': x = Base64.decode(f.slice(0,12)); break;
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case 'binary': x = f; break;
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case 'array': return [f[0], f[1], f[2], f[3], f[4], f[5], f[6], f[7]];
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default: throw new Error("Unrecognized type " + (o && o.type || "undefined"));
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}
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return [x.charCodeAt(0), x.charCodeAt(1), x.charCodeAt(2), x.charCodeAt(3), x.charCodeAt(4), x.charCodeAt(5), x.charCodeAt(6), x.charCodeAt(7)];
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}
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function read_cfb(cfb/*:CFBContainer*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
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if(CFB.find(cfb, "EncryptedPackage")) return parse_xlsxcfb(cfb, opts);
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return parse_xlscfb(cfb, opts);
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}
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function read_zip(data/*:RawData*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
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var zip, d = data;
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var o = opts||{};
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if(!o.type) o.type = (has_buf && Buffer.isBuffer(data)) ? "buffer" : "base64";
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zip = zip_read(d, o);
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return parse_zip(zip, o);
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}
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function read_plaintext(data/*:string*/, o/*:ParseOpts*/)/*:Workbook*/ {
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var i = 0;
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main: while(i < data.length) switch(data.charCodeAt(i)) {
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case 0x0A: case 0x0D: case 0x20: ++i; break;
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case 0x3C: return parse_xlml(data.slice(i),o);
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default: break main;
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}
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return PRN.to_workbook(data, o);
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}
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function read_plaintext_raw(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
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var str = "", bytes = firstbyte(data, o);
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switch(o.type) {
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case 'base64': str = Base64.decode(data); break;
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case 'binary': str = data; break;
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case 'buffer': str = data.toString('binary'); break;
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case 'array': str = cc2str(data); break;
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default: throw new Error("Unrecognized type " + o.type);
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}
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if(bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF) str = utf8read(str);
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return read_plaintext(str, o);
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}
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function read_utf16(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
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var d = data;
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if(o.type == 'base64') d = Base64.decode(d);
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d = cptable.utils.decode(1200, d.slice(2), 'str');
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o.type = "binary";
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return read_plaintext(d, o);
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}
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function bstrify(data/*:string*/)/*:string*/ {
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return !data.match(/[^\x00-\x7F]/) ? data : utf8write(data);
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}
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function read_prn(data, d, o, str) {
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if(str) { o.type = "string"; return PRN.to_workbook(data, o); }
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return PRN.to_workbook(d, o);
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}
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function readSync(data/*:RawData*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
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reset_cp();
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var o = opts||{};
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if(typeof ArrayBuffer !== 'undefined' && data instanceof ArrayBuffer) return readSync(new Uint8Array(data), (o = dup(o), o.type = "array", o));
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var d = data, n = [0,0,0,0], str = false;
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if(o.cellStyles) { o.cellNF = true; o.sheetStubs = true; }
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_ssfopts = {};
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if(o.dateNF) _ssfopts.dateNF = o.dateNF;
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if(!o.type) o.type = (has_buf && Buffer.isBuffer(data)) ? "buffer" : "base64";
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if(o.type == "file") { o.type = has_buf ? "buffer" : "binary"; d = read_binary(data); }
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if(o.type == "string") { str = true; o.type = "binary"; o.codepage = 65001; d = bstrify(data); }
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if(o.type == 'array' && typeof Uint8Array !== 'undefined' && data instanceof Uint8Array && typeof ArrayBuffer !== 'undefined') {
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// $FlowIgnore
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var ab=new ArrayBuffer(3), vu=new Uint8Array(ab); vu.foo="bar";
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// $FlowIgnore
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if(!vu.foo) {o=dup(o); o.type='array'; return readSync(ab2a(d), o);}
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}
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switch((n = firstbyte(d, o))[0]) {
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case 0xD0: if(n[1] === 0xCF && n[2] === 0x11 && n[3] === 0xE0 && n[4] === 0xA1 && n[5] === 0xB1 && n[6] === 0x1A && n[7] === 0xE1) return read_cfb(CFB.read(d, o), o); break;
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case 0x09: if(n[1] <= 0x08) return parse_xlscfb(d, o); break;
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case 0x3C: return parse_xlml(d, o);
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case 0x49:
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if(n[1] === 0x49 && n[2] === 0x2a && n[3] === 0x00) throw new Error("TIFF Image File is not a spreadsheet");
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if(n[1] === 0x44) return read_wb_ID(d, o);
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break;
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case 0x54: if(n[1] === 0x41 && n[2] === 0x42 && n[3] === 0x4C) return DIF.to_workbook(d, o); break;
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case 0x50: return (n[1] === 0x4B && n[2] < 0x09 && n[3] < 0x09) ? read_zip(d, o) : read_prn(data, d, o, str);
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case 0xEF: return n[3] === 0x3C ? parse_xlml(d, o) : read_prn(data, d, o, str);
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case 0xFF:
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if(n[1] === 0xFE) { return read_utf16(d, o); }
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else if(n[1] === 0x00 && n[2] === 0x02 && n[3] === 0x00) return WK_.to_workbook(d, o);
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break;
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case 0x00:
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if(n[1] === 0x00) {
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if(n[2] >= 0x02 && n[3] === 0x00) return WK_.to_workbook(d, o);
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if(n[2] === 0x00 && (n[3] === 0x08 || n[3] === 0x09)) return WK_.to_workbook(d, o);
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}
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break;
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case 0x03: case 0x83: case 0x8B: case 0x8C: return DBF.to_workbook(d, o);
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case 0x7B: if(n[1] === 0x5C && n[2] === 0x72 && n[3] === 0x74) return RTF.to_workbook(d, o); break;
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case 0x0A: case 0x0D: case 0x20: return read_plaintext_raw(d, o);
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case 0x89: if(n[1] === 0x50 && n[2] === 0x4E && n[3] === 0x47) throw new Error("PNG Image File is not a spreadsheet"); break;
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}
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if(DBF.versions.indexOf(n[0]) > -1 && n[2] <= 12 && n[3] <= 31) return DBF.to_workbook(d, o);
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return read_prn(data, d, o, str);
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}
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function readFileSync(filename/*:string*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
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var o = opts||{}; o.type = 'file';
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return readSync(filename, o);
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}
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