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c654a2656b
sheetjs/bits/38_xlstypes.js
reviewher c654a2656b archaic browser compatibility and testing 
IE11 Compatibility View levels 5 and 7 (see #952)
Firefox 5.0+ passes browser test (see #950)
2018-01-11 03:07:07 -05:00

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/* [MS-DTYP] 2.3.3 FILETIME */
/* [MS-OLEDS] 2.1.3 FILETIME (Packet Version) */
/* [MS-OLEPS] 2.8 FILETIME (Packet Version) */
function parse_FILETIME(blob) {
var dwLowDateTime = blob.read_shift(4), dwHighDateTime = blob.read_shift(4);
return new Date(((dwHighDateTime/1e7*Math.pow(2,32) + dwLowDateTime/1e7) - 11644473600)*1000).toISOString().replace(/\.000/,"");
}
/* [MS-OSHARED] 2.3.3.1.4 Lpstr */
function parse_lpstr(blob, type, pad/*:?number*/) {
var start = blob.l;
var str = blob.read_shift(0, 'lpstr-cp');
if(pad) while((blob.l - start) & 3) ++blob.l;
return str;
}
/* [MS-OSHARED] 2.3.3.1.6 Lpwstr */
function parse_lpwstr(blob, type, pad) {
var str = blob.read_shift(0, 'lpwstr');
if(pad) blob.l += (4 - ((str.length+1) & 3)) & 3;
return str;
}
/* [MS-OSHARED] 2.3.3.1.11 VtString */
/* [MS-OSHARED] 2.3.3.1.12 VtUnalignedString */
function parse_VtStringBase(blob, stringType, pad) {
if(stringType === 0x1F /*VT_LPWSTR*/) return parse_lpwstr(blob);
return parse_lpstr(blob, stringType, pad);
}
function parse_VtString(blob, t/*:number*/, pad/*:?boolean*/) { return parse_VtStringBase(blob, t, pad === false ? 0: 4); }
function parse_VtUnalignedString(blob, t/*:number*/) { if(!t) throw new Error("VtUnalignedString must have positive length"); return parse_VtStringBase(blob, t, 0); }
/* [MS-OSHARED] 2.3.3.1.9 VtVecUnalignedLpstrValue */
function parse_VtVecUnalignedLpstrValue(blob)/*:Array<string>*/ {
var length = blob.read_shift(4);
var ret/*:Array<string>*/ = [];
for(var i = 0; i != length; ++i) ret[i] = blob.read_shift(0, 'lpstr-cp').replace(chr0,'');
return ret;
}
/* [MS-OSHARED] 2.3.3.1.10 VtVecUnalignedLpstr */
function parse_VtVecUnalignedLpstr(blob)/*:Array<string>*/ {
return parse_VtVecUnalignedLpstrValue(blob);
}
/* [MS-OSHARED] 2.3.3.1.13 VtHeadingPair */
function parse_VtHeadingPair(blob) {
var headingString = parse_TypedPropertyValue(blob, VT_USTR);
var headerParts = parse_TypedPropertyValue(blob, VT_I4);
return [headingString, headerParts];
}
/* [MS-OSHARED] 2.3.3.1.14 VtVecHeadingPairValue */
function parse_VtVecHeadingPairValue(blob) {
var cElements = blob.read_shift(4);
var out = [];
for(var i = 0; i != cElements / 2; ++i) out.push(parse_VtHeadingPair(blob));
return out;
}
/* [MS-OSHARED] 2.3.3.1.15 VtVecHeadingPair */
function parse_VtVecHeadingPair(blob) {
// NOTE: When invoked, wType & padding were already consumed
return parse_VtVecHeadingPairValue(blob);
}
/* [MS-OLEPS] 2.18.1 Dictionary (uses 2.17, 2.16) */
function parse_dictionary(blob,CodePage) {
var cnt = blob.read_shift(4);
var dict/*:{[number]:string}*/ = ({}/*:any*/);
for(var j = 0; j != cnt; ++j) {
var pid = blob.read_shift(4);
var len = blob.read_shift(4);
dict[pid] = blob.read_shift(len, (CodePage === 0x4B0 ?'utf16le':'utf8')).replace(chr0,'').replace(chr1,'!');
}
if(blob.l & 3) blob.l = (blob.l>>2+1)<<2;
return dict;
}
/* [MS-OLEPS] 2.9 BLOB */
function parse_BLOB(blob) {
var size = blob.read_shift(4);
var bytes = blob.slice(blob.l,blob.l+size);
if((size & 3) > 0) blob.l += (4 - (size & 3)) & 3;
return bytes;
}
/* [MS-OLEPS] 2.11 ClipboardData */
function parse_ClipboardData(blob) {
// TODO
var o = {};
o.Size = blob.read_shift(4);
//o.Format = blob.read_shift(4);
blob.l += o.Size;
return o;
}
/* [MS-OLEPS] 2.14 Vector and Array Property Types */
function parse_VtVector(blob, cb) {
/* [MS-OLEPS] 2.14.2 VectorHeader */
/* var Length = blob.read_shift(4);
var o = [];
for(var i = 0; i != Length; ++i) {
o.push(cb(blob));
}
return o;*/
}
/* [MS-OLEPS] 2.15 TypedPropertyValue */
function parse_TypedPropertyValue(blob, type/*:number*/, _opts)/*:any*/ {
var t = blob.read_shift(2), ret, opts = _opts||{};
blob.l += 2;
if(type !== VT_VARIANT)
if(t !== type && VT_CUSTOM.indexOf(type)===-1) throw new Error('Expected type ' + type + ' saw ' + t);
switch(type === VT_VARIANT ? t : type) {
case 0x02 /*VT_I2*/: ret = blob.read_shift(2, 'i'); if(!opts.raw) blob.l += 2; return ret;
case 0x03 /*VT_I4*/: ret = blob.read_shift(4, 'i'); return ret;
case 0x0B /*VT_BOOL*/: return blob.read_shift(4) !== 0x0;
case 0x13 /*VT_UI4*/: ret = blob.read_shift(4); return ret;
case 0x1E /*VT_LPSTR*/: return parse_lpstr(blob, t, 4).replace(chr0,'');
case 0x1F /*VT_LPWSTR*/: return parse_lpwstr(blob);
case 0x40 /*VT_FILETIME*/: return parse_FILETIME(blob);
case 0x41 /*VT_BLOB*/: return parse_BLOB(blob);
case 0x47 /*VT_CF*/: return parse_ClipboardData(blob);
case 0x50 /*VT_STRING*/: return parse_VtString(blob, t, !opts.raw).replace(chr0,'');
case 0x51 /*VT_USTR*/: return parse_VtUnalignedString(blob, t/*, 4*/).replace(chr0,'');
case 0x100C /*VT_VECTOR|VT_VARIANT*/: return parse_VtVecHeadingPair(blob);
case 0x101E /*VT_LPSTR*/: return parse_VtVecUnalignedLpstr(blob);
default: throw new Error("TypedPropertyValue unrecognized type " + type + " " + t);
}
}
/* [MS-OLEPS] 2.14.2 VectorHeader */
/*function parse_VTVectorVariant(blob) {
var Length = blob.read_shift(4);
if(Length & 1 !== 0) throw new Error("VectorHeader Length=" + Length + " must be even");
var o = [];
for(var i = 0; i != Length; ++i) {
o.push(parse_TypedPropertyValue(blob, VT_VARIANT));
}
return o;
}*/
/* [MS-OLEPS] 2.20 PropertySet */
function parse_PropertySet(blob, PIDSI) {
var start_addr = blob.l;
var size = blob.read_shift(4);
var NumProps = blob.read_shift(4);
var Props = [], i = 0;
var CodePage = 0;
var Dictionary = -1, DictObj/*:{[number]:string}*/ = ({}/*:any*/);
for(i = 0; i != NumProps; ++i) {
var PropID = blob.read_shift(4);
var Offset = blob.read_shift(4);
Props[i] = [PropID, Offset + start_addr];
}
Props.sort(function(x,y) { return x[1] - y[1]; });
var PropH = {};
for(i = 0; i != NumProps; ++i) {
if(blob.l !== Props[i][1]) {
var fail = true;
if(i>0 && PIDSI) switch(PIDSI[Props[i-1][0]].t) {
case 0x02 /*VT_I2*/: if(blob.l+2 === Props[i][1]) { blob.l+=2; fail = false; } break;
case 0x50 /*VT_STRING*/: if(blob.l <= Props[i][1]) { blob.l=Props[i][1]; fail = false; } break;
case 0x100C /*VT_VECTOR|VT_VARIANT*/: if(blob.l <= Props[i][1]) { blob.l=Props[i][1]; fail = false; } break;
}
if((!PIDSI||i==0) && blob.l <= Props[i][1]) { fail=false; blob.l = Props[i][1]; }
if(fail) throw new Error("Read Error: Expected address " + Props[i][1] + ' at ' + blob.l + ' :' + i);
}
if(PIDSI) {
var piddsi = PIDSI[Props[i][0]];
PropH[piddsi.n] = parse_TypedPropertyValue(blob, piddsi.t, {raw:true});
if(piddsi.p === 'version') PropH[piddsi.n] = String(PropH[piddsi.n] >> 16) + "." + String(PropH[piddsi.n] & 0xFFFF);
if(piddsi.n == "CodePage") switch(PropH[piddsi.n]) {
case 0: PropH[piddsi.n] = 1252;
/* falls through */
case 874:
case 932:
case 936:
case 949:
case 950:
case 1250:
case 1251:
case 1253:
case 1254:
case 1255:
case 1256:
case 1257:
case 1258:
case 10000:
case 1200:
case 1201:
case 1252:
case 65000: case -536:
case 65001: case -535:
set_cp(CodePage = (PropH[piddsi.n]>>>0) & 0xFFFF); break;
default: throw new Error("Unsupported CodePage: " + PropH[piddsi.n]);
}
} else {
if(Props[i][0] === 0x1) {
CodePage = PropH.CodePage = (parse_TypedPropertyValue(blob, VT_I2)/*:number*/);
set_cp(CodePage);
if(Dictionary !== -1) {
var oldpos = blob.l;
blob.l = Props[Dictionary][1];
DictObj = parse_dictionary(blob,CodePage);
blob.l = oldpos;
}
} else if(Props[i][0] === 0) {
if(CodePage === 0) { Dictionary = i; blob.l = Props[i+1][1]; continue; }
DictObj = parse_dictionary(blob,CodePage);
} else {
var name = DictObj[Props[i][0]];
var val;
/* [MS-OSHARED] 2.3.3.2.3.1.2 + PROPVARIANT */
switch(blob[blob.l]) {
case 0x41 /*VT_BLOB*/: blob.l += 4; val = parse_BLOB(blob); break;
case 0x1E /*VT_LPSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]); break;
case 0x1F /*VT_LPWSTR*/: blob.l += 4; val = parse_VtString(blob, blob[blob.l-4]); break;
case 0x03 /*VT_I4*/: blob.l += 4; val = blob.read_shift(4, 'i'); break;
case 0x13 /*VT_UI4*/: blob.l += 4; val = blob.read_shift(4); break;
case 0x05 /*VT_R8*/: blob.l += 4; val = blob.read_shift(8, 'f'); break;
case 0x0B /*VT_BOOL*/: blob.l += 4; val = parsebool(blob, 4); break;
case 0x40 /*VT_FILETIME*/: blob.l += 4; val = parseDate(parse_FILETIME(blob)); break;
default: throw new Error("unparsed value: " + blob[blob.l]);
}
PropH[name] = val;
}
}
}
blob.l = start_addr + size; /* step ahead to skip padding */
return PropH;
}
/* [MS-OLEPS] 2.21 PropertySetStream */
function parse_PropertySetStream(file, PIDSI) {
var blob = file.content;
if(!blob) return ({}/*:any*/);
prep_blob(blob, 0);
var NumSets, FMTID0, FMTID1, Offset0, Offset1 = 0;
blob.chk('feff', 'Byte Order: ');
var vers = blob.read_shift(2); // TODO: check version
var SystemIdentifier = blob.read_shift(4);
blob.chk(CFB.utils.consts.HEADER_CLSID, 'CLSID: ');
NumSets = blob.read_shift(4);
if(NumSets !== 1 && NumSets !== 2) throw new Error("Unrecognized #Sets: " + NumSets);
FMTID0 = blob.read_shift(16); Offset0 = blob.read_shift(4);
if(NumSets === 1 && Offset0 !== blob.l) throw new Error("Length mismatch: " + Offset0 + " !== " + blob.l);
else if(NumSets === 2) { FMTID1 = blob.read_shift(16); Offset1 = blob.read_shift(4); }
var PSet0 = parse_PropertySet(blob, PIDSI);
var rval = ({ SystemIdentifier: SystemIdentifier }/*:any*/);
for(var y in PSet0) rval[y] = PSet0[y];
//rval.blob = blob;
rval.FMTID = FMTID0;
//rval.PSet0 = PSet0;
if(NumSets === 1) return rval;
if(blob.l !== Offset1) throw new Error("Length mismatch 2: " + blob.l + " !== " + Offset1);
var PSet1;
try { PSet1 = parse_PropertySet(blob, null); } catch(e) {/* empty */}
for(y in PSet1) rval[y] = PSet1[y];
rval.FMTID = [FMTID0, FMTID1]; // TODO: verify FMTID0/1
return rval;
}
function parsenoop2(blob, length) { blob.read_shift(length); return null; }
function writezeroes(n, o) { if(!o) o=new_buf(n); for(var j=0; j<n; ++j) o.write_shift(1, 0); return o; }
function parslurp(blob, length, cb) {
var arr = [], target = blob.l + length;
while(blob.l < target) arr.push(cb(blob, target - blob.l));
if(target !== blob.l) throw new Error("Slurp error");
return arr;
}
function parsebool(blob, length/*:number*/) { return blob.read_shift(length) === 0x1; }
function writebool(v/*:any*/, o) { if(!o) o=new_buf(2); o.write_shift(2, +!!v); return o; }
function parseuint16(blob/*::, length:?number, opts:?any*/) { return blob.read_shift(2, 'u'); }
function writeuint16(v/*:number*/, o) { if(!o) o=new_buf(2); o.write_shift(2, v); return o; }
function parseuint16a(blob, length/*:: :?number, opts:?any*/) { return parslurp(blob,length,parseuint16);}
/* --- 2.5 Structures --- */
/* [MS-XLS] 2.5.10 Bes (boolean or error) */
function parse_Bes(blob/*::, length*/) {
var v = blob.read_shift(1), t = blob.read_shift(1);
return t === 0x01 ? v : v === 0x01;
}
function write_Bes(v, t/*:string*/, o) {
if(!o) o = new_buf(2);
o.write_shift(1, +v);
o.write_shift(1, t == 'e' ? 1 : 0);
return o;
}
/* [MS-XLS] 2.5.240 ShortXLUnicodeString */
function parse_ShortXLUnicodeString(blob, length, opts) {
var cch = blob.read_shift(opts && opts.biff >= 12 ? 2 : 1);
var width = 1, encoding = 'sbcs-cont';
var cp = current_codepage;
if(opts && opts.biff >= 8) current_codepage = 1200;
if(!opts || opts.biff == 8 ) {
var fHighByte = blob.read_shift(1);
if(fHighByte) { width = 2; encoding = 'dbcs-cont'; }
} else if(opts.biff == 12) {
width = 2; encoding = 'wstr';
}
if(opts.biff >= 2 && opts.biff <= 5) encoding = 'cpstr';
var o = cch ? blob.read_shift(cch, encoding) : "";
current_codepage = cp;
return o;
}
/* 2.5.293 XLUnicodeRichExtendedString */
function parse_XLUnicodeRichExtendedString(blob) {
var cp = current_codepage;
current_codepage = 1200;
var cch = blob.read_shift(2), flags = blob.read_shift(1);
var fHighByte = flags & 0x1, fExtSt = flags & 0x4, fRichSt = flags & 0x8;
var width = 1 + (flags & 0x1); // 0x0 -> utf8, 0x1 -> dbcs
var cRun = 0, cbExtRst;
var z = {};
if(fRichSt) cRun = blob.read_shift(2);
if(fExtSt) cbExtRst = blob.read_shift(4);
var encoding = width == 2 ? 'dbcs-cont' : 'sbcs-cont';
var msg = cch === 0 ? "" : blob.read_shift(cch, encoding);
if(fRichSt) blob.l += 4 * cRun; //TODO: parse this
if(fExtSt) blob.l += cbExtRst; //TODO: parse this
z.t = msg;
if(!fRichSt) { z.raw = "<t>" + z.t + "</t>"; z.r = z.t; }
current_codepage = cp;
return z;
}
/* 2.5.296 XLUnicodeStringNoCch */
function parse_XLUnicodeStringNoCch(blob, cch, opts) {
var retval;
if(opts) {
if(opts.biff >= 2 && opts.biff <= 5) return blob.read_shift(cch, 'cpstr');
if(opts.biff >= 12) return blob.read_shift(cch, 'dbcs-cont');
}
var fHighByte = blob.read_shift(1);
if(fHighByte===0) { retval = blob.read_shift(cch, 'sbcs-cont'); }
else { retval = blob.read_shift(cch, 'dbcs-cont'); }
return retval;
}
/* 2.5.294 XLUnicodeString */
function parse_XLUnicodeString(blob, length, opts) {
var cch = blob.read_shift(opts && opts.biff == 2 ? 1 : 2);
if(cch === 0) { blob.l++; return ""; }
return parse_XLUnicodeStringNoCch(blob, cch, opts);
}
/* BIFF5 override */
function parse_XLUnicodeString2(blob, length, opts) {
if(opts.biff > 5) return parse_XLUnicodeString(blob, length, opts);
var cch = blob.read_shift(1);
if(cch === 0) { blob.l++; return ""; }
return blob.read_shift(cch, (opts.biff <= 4 || !blob.lens ) ? 'cpstr' : 'sbcs-cont');
}
/* TODO: BIFF5 and lower, codepage awareness */
function write_XLUnicodeString(str, opts, o) {
if(!o) o = new_buf(3 + 2 * str.length);
o.write_shift(2, str.length);
o.write_shift(1, 1);
o.write_shift(31, str, 'utf16le');
return o;
}
/* [MS-XLS] 2.5.61 ControlInfo */
function parse_ControlInfo(blob, length, opts) {
var flags = blob.read_shift(1);
blob.l++;
var accel = blob.read_shift(2);
blob.l += 2;
return [flags, accel];
}
/* [MS-OSHARED] 2.3.7.6 URLMoniker TODO: flags */
function parse_URLMoniker(blob/*::, length, opts*/) {
var len = blob.read_shift(4), start = blob.l;
var extra = false;
if(len > 24) {
/* look ahead */
blob.l += len - 24;
if(blob.read_shift(16) === "795881f43b1d7f48af2c825dc4852763") extra = true;
blob.l = start;
}
var url = blob.read_shift((extra?len-24:len)>>1, 'utf16le').replace(chr0,"");
if(extra) blob.l += 24;
return url;
}
/* [MS-OSHARED] 2.3.7.8 FileMoniker TODO: all fields */
function parse_FileMoniker(blob, length) {
var cAnti = blob.read_shift(2);
var ansiPath = blob.read_shift(0, 'lpstr-ansi');
var endServer = blob.read_shift(2);
if(blob.read_shift(2) != 0xDEAD) throw new Error("Bad FileMoniker");
var sz = blob.read_shift(4);
if(sz === 0) return ansiPath.replace(/\\/g,"/");
var bytes = blob.read_shift(4);
if(blob.read_shift(2) != 3) throw new Error("Bad FileMoniker");
var unicodePath = blob.read_shift(bytes>>1, 'utf16le').replace(chr0,"");
return unicodePath;
}
/* [MS-OSHARED] 2.3.7.2 HyperlinkMoniker TODO: all the monikers */
function parse_HyperlinkMoniker(blob, length) {
var clsid = blob.read_shift(16); length -= 16;
switch(clsid) {
case "e0c9ea79f9bace118c8200aa004ba90b": return parse_URLMoniker(blob, length);
case "0303000000000000c000000000000046": return parse_FileMoniker(blob, length);
default: throw new Error("Unsupported Moniker " + clsid);
}
}
/* [MS-OSHARED] 2.3.7.9 HyperlinkString */
function parse_HyperlinkString(blob, length) {
var len = blob.read_shift(4);
var o = len > 0 ? blob.read_shift(len, 'utf16le').replace(chr0, "") : "";
return o;
}
/* [MS-OSHARED] 2.3.7.1 Hyperlink Object */
function parse_Hyperlink(blob, length)/*:Hyperlink*/ {
var end = blob.l + length;
var sVer = blob.read_shift(4);
if(sVer !== 2) throw new Error("Unrecognized streamVersion: " + sVer);
var flags = blob.read_shift(2);
blob.l += 2;
var displayName, targetFrameName, moniker, oleMoniker, Location="", guid, fileTime;
if(flags & 0x0010) displayName = parse_HyperlinkString(blob, end - blob.l);
if(flags & 0x0080) targetFrameName = parse_HyperlinkString(blob, end - blob.l);
if((flags & 0x0101) === 0x0101) moniker = parse_HyperlinkString(blob, end - blob.l);
if((flags & 0x0101) === 0x0001) oleMoniker = parse_HyperlinkMoniker(blob, end - blob.l);
if(flags & 0x0008) Location = parse_HyperlinkString(blob, end - blob.l);
if(flags & 0x0020) guid = blob.read_shift(16);
if(flags & 0x0040) fileTime = parse_FILETIME(blob/*, 8*/);
blob.l = end;
var target = targetFrameName||moniker||oleMoniker||"";
if(target && Location) target+="#"+Location;
if(!target) target = "#" + Location;
return {Target: target};
}
function write_Hyperlink(hl) {
var out = new_buf(512), i = 0;
var Target = hl.Target;
var F = Target.indexOf("#") > -1 ? 0x1f : 0x17;
switch(Target.charAt(0)) { case "#": F=0x1c; break; case ".": F&=~2; break; }
out.write_shift(4,2); out.write_shift(4, F);
var data = [8,6815827,6619237,4849780,83]; for(i = 0; i < data.length; ++i) out.write_shift(4, data[i]);
if(F == 0x1C) {
Target = Target.slice(1);
out.write_shift(4, Target.length + 1);
for(i = 0; i < Target.length; ++i) out.write_shift(2, Target.charCodeAt(i));
out.write_shift(2, 0);
} else if(F & 0x02) {
data = "e0 c9 ea 79 f9 ba ce 11 8c 82 00 aa 00 4b a9 0b".split(" ");
for(i = 0; i < data.length; ++i) out.write_shift(1, parseInt(data[i], 16));
out.write_shift(4, 2*(Target.length + 1));
for(i = 0; i < Target.length; ++i) out.write_shift(2, Target.charCodeAt(i));
out.write_shift(2, 0);
} else {
data = "03 03 00 00 00 00 00 00 c0 00 00 00 00 00 00 46".split(" ");
for(i = 0; i < data.length; ++i) out.write_shift(1, parseInt(data[i], 16));
var P = 0;
while(Target.slice(P*3,P*3+3)=="../"||Target.slice(P*3,P*3+3)=="..\\") ++P;
out.write_shift(2, P);
out.write_shift(4, Target.length + 1);
for(i = 0; i < Target.length; ++i) out.write_shift(1, Target.charCodeAt(i) & 0xFF);
out.write_shift(1, 0);
out.write_shift(2, 0xFFFF);
out.write_shift(2, 0xDEAD);
for(i = 0; i < 6; ++i) out.write_shift(4, 0);
}
return out.slice(0, out.l);
}
/* 2.5.178 LongRGBA */
function parse_LongRGBA(blob, length) { var r = blob.read_shift(1), g = blob.read_shift(1), b = blob.read_shift(1), a = blob.read_shift(1); return [r,g,b,a]; }
/* 2.5.177 LongRGB */
function parse_LongRGB(blob, length) { var x = parse_LongRGBA(blob, length); x[3] = 0; return x; }
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