forked from sheetjs/sheetjs
SheetJS
f968dfe4ed
- BIFF5 XLS write (bookType "biff5") - DBF Level 7 read - ODS whitespace and repeated rows - flow and lint cleanup
103 lines
4.1 KiB
JavaScript
103 lines
4.1 KiB
JavaScript
function firstbyte(f/*:RawData*/,o/*:?TypeOpts*/)/*:Array<number>*/ {
|
|
var x = "";
|
|
switch((o||{}).type || "base64") {
|
|
case 'buffer': return [f[0], f[1], f[2], f[3]];
|
|
case 'base64': x = Base64.decode(f.substr(0,24)); break;
|
|
case 'binary': x = f; break;
|
|
case 'array': return [f[0], f[1], f[2], f[3]];
|
|
default: throw new Error("Unrecognized type " + (o && o.type || "undefined"));
|
|
}
|
|
return [x.charCodeAt(0), x.charCodeAt(1), x.charCodeAt(2), x.charCodeAt(3)];
|
|
}
|
|
|
|
function read_cfb(cfb/*:CFBContainer*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
|
|
if(CFB.find(cfb, "EncryptedPackage")) return parse_xlsxcfb(cfb, opts);
|
|
return parse_xlscfb(cfb, opts);
|
|
}
|
|
|
|
function read_zip(data/*:RawData*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
|
|
/*:: if(!jszip) throw new Error("JSZip is not available"); */
|
|
var zip, d = data;
|
|
var o = opts||{};
|
|
if(!o.type) o.type = (has_buf && Buffer.isBuffer(data)) ? "buffer" : "base64";
|
|
switch(o.type) {
|
|
case "base64": zip = new jszip(d, { base64:true }); break;
|
|
case "binary": case "array": zip = new jszip(d, { base64:false }); break;
|
|
case "buffer": zip = new jszip(d); break;
|
|
default: throw new Error("Unrecognized type " + o.type);
|
|
}
|
|
return parse_zip(zip, o);
|
|
}
|
|
|
|
function read_plaintext(data/*:string*/, o/*:ParseOpts*/)/*:Workbook*/ {
|
|
var i = 0;
|
|
main: while(i < data.length) switch(data.charCodeAt(i)) {
|
|
case 0x0A: case 0x0D: case 0x20: ++i; break;
|
|
case 0x3C: return parse_xlml(data.slice(i),o);
|
|
default: break main;
|
|
}
|
|
return PRN.to_workbook(data, o);
|
|
}
|
|
|
|
function read_plaintext_raw(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
|
|
var str = "", bytes = firstbyte(data, o);
|
|
switch(o.type) {
|
|
case 'base64': str = Base64.decode(data); break;
|
|
case 'binary': str = data; break;
|
|
case 'buffer': str = data.toString('binary'); break;
|
|
case 'array': str = cc2str(data); break;
|
|
default: throw new Error("Unrecognized type " + o.type);
|
|
}
|
|
if(bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF) str = utf8read(str);
|
|
return read_plaintext(str, o);
|
|
}
|
|
|
|
function read_utf16(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
|
|
var d = data;
|
|
if(o.type == 'base64') d = Base64.decode(d);
|
|
d = cptable.utils.decode(1200, d.slice(2), 'str');
|
|
o.type = "binary";
|
|
return read_plaintext(d, o);
|
|
}
|
|
|
|
function bstrify(data/*:string*/)/*:string*/ {
|
|
return !data.match(/[^\x00-\x7F]/) ? data : utf8write(data);
|
|
}
|
|
|
|
function read_prn(data, d, o, str) {
|
|
if(str) { o.type = "string"; return PRN.to_workbook(data, o); }
|
|
return PRN.to_workbook(d, o);
|
|
}
|
|
|
|
function readSync(data/*:RawData*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
|
|
var zip, d = data, n = [0,0,0,0], str = false;
|
|
var o = opts||{};
|
|
_ssfopts = {};
|
|
if(o.dateNF) _ssfopts.dateNF = o.dateNF;
|
|
if(!o.type) o.type = (has_buf && Buffer.isBuffer(data)) ? "buffer" : "base64";
|
|
if(o.type == "file") { o.type = "buffer"; d = _fs.readFileSync(data); }
|
|
if(o.type == "string") { str = true; o.type = "binary"; d = bstrify(data); }
|
|
switch((n = firstbyte(d, o))[0]) {
|
|
case 0xD0: return read_cfb(CFB.read(d, o), o);
|
|
case 0x09: return parse_xlscfb(d, o);
|
|
case 0x3C: return parse_xlml(d, o);
|
|
case 0x49: if(n[1] === 0x44) return read_wb_ID(d, o); break;
|
|
case 0x54: if(n[1] === 0x41 && n[2] === 0x42 && n[3] === 0x4C) return DIF.to_workbook(d, o); break;
|
|
case 0x50: if(n[1] === 0x4B && n[2] < 0x20 && n[3] < 0x20) return read_zip(d, o); break;
|
|
case 0xEF: return n[3] === 0x3C ? parse_xlml(d, o) : read_prn(data, d, o, str);
|
|
case 0xFF: if(n[1] === 0xFE) { return read_utf16(d, o); } break;
|
|
case 0x00: if(n[1] === 0x00 && n[2] >= 0x02 && n[3] === 0x00) return WK_.to_workbook(d, o); break;
|
|
case 0x03: case 0x83: case 0x8B: case 0x8C: return DBF.to_workbook(d, o);
|
|
case 0x7B: if(n[1] === 0x5C && n[2] === 0x72 && n[3] === 0x74) return RTF.to_workbook(d, o); break;
|
|
case 0x0A: case 0x0D: case 0x20: return read_plaintext_raw(d, o);
|
|
}
|
|
if(n[2] <= 12 && n[3] <= 31) return DBF.to_workbook(d, o);
|
|
if(0x20>n[0]||n[0]>0x7F) throw new Error("Unsupported file " + n.join("|"));
|
|
return read_prn(data, d, o, str);
|
|
}
|
|
|
|
function readFileSync(filename/*:string*/, opts/*:?ParseOpts*/)/*:Workbook*/ {
|
|
var o = opts||{}; o.type = 'file';
|
|
return readSync(filename, o);
|
|
}
|