forked from sheetjs/sheetjs
SheetJS
d4999ac421
- browser shim updated (h/t @wintersm for discovering this) - smart tag ignores (h/t @lostinplace) - sheet_to_row_object_array bugfix (fixes #80, h/t @ChrisBurkeBSD) - README improved - baltic and vietnamese codepages: updated codepage to 1.3.4 - iOS Numbers can handle inline strings -> disabling SST by default - avoid Buffer accessors (see https://github.com/joyent/node/issues/7809) - caching certain hot regexes
88 lines
3.4 KiB
JavaScript
88 lines
3.4 KiB
JavaScript
function readIEEE754(buf, idx, isLE, nl, ml) {
|
|
if(isLE === undefined) isLE = true;
|
|
if(!nl) nl = 8;
|
|
if(!ml && nl === 8) ml = 52;
|
|
var e, m, el = nl * 8 - ml - 1, eMax = (1 << el) - 1, eBias = eMax >> 1;
|
|
var bits = -7, d = isLE ? -1 : 1, i = isLE ? (nl - 1) : 0, s = buf[idx + i];
|
|
|
|
i += d;
|
|
e = s & ((1 << (-bits)) - 1); s >>>= (-bits); bits += el;
|
|
for (; bits > 0; e = e * 256 + buf[idx + i], i += d, bits -= 8);
|
|
m = e & ((1 << (-bits)) - 1); e >>>= (-bits); bits += ml;
|
|
for (; bits > 0; m = m * 256 + buf[idx + i], i += d, bits -= 8);
|
|
if (e === eMax) return m ? NaN : ((s ? -1 : 1) * Infinity);
|
|
else if (e === 0) e = 1 - eBias;
|
|
else { m = m + Math.pow(2, ml); e = e - eBias; }
|
|
return (s ? -1 : 1) * m * Math.pow(2, e - ml);
|
|
}
|
|
|
|
var __toBuffer, ___toBuffer;
|
|
__toBuffer = ___toBuffer = function toBuffer_(bufs) { var x = []; for(var i = 0; i < bufs[0].length; ++i) { x.push.apply(x, bufs[0][i]); } return x; };
|
|
var __double, ___double;
|
|
__double = ___double = function(b, idx) { return readIEEE754(b, idx);};
|
|
|
|
var is_buf = function is_buf_a(a) { return Array.isArray(a); };
|
|
if(has_buf) {
|
|
__toBuffer = function(bufs) { return (bufs[0].length > 0 && Buffer.isBuffer(bufs[0][0])) ? Buffer.concat(bufs[0]) : ___toBuffer(bufs);};
|
|
__double = function double_(b,i) { if(Buffer.isBuffer(b)) return b.readDoubleLE(i); return ___double(b,i); };
|
|
is_buf = function is_buf_b(a) { return Buffer.isBuffer(a) || Array.isArray(a); };
|
|
}
|
|
|
|
|
|
var __readUInt8 = function(b, idx) { return b[idx]; };
|
|
var __readUInt16LE = function(b, idx) { return b[idx+1]*(1<<8)+b[idx]; };
|
|
var __readInt16LE = function(b, idx) { var u = b[idx+1]*(1<<8)+b[idx]; return (u < 0x8000) ? u : (0xffff - u + 1) * -1; };
|
|
var __readUInt32LE = function(b, idx) { return b[idx+3]*(1<<24)+(b[idx+2]<<16)+(b[idx+1]<<8)+b[idx]; };
|
|
var __readInt32LE = function(b, idx) { return (b[idx+3]<<24)|(b[idx+2]<<16)|(b[idx+1]<<8)|b[idx]; };
|
|
|
|
|
|
function ReadShift(size, t) {
|
|
var o="", oo=[], w, vv, i, loc;
|
|
if(t === 'dbcs') {
|
|
loc = this.l;
|
|
if(has_buf && Buffer.isBuffer(this)) o = this.slice(this.l, this.l+2*size).toString("utf16le");
|
|
else for(i = 0; i != size; ++i) { o+=String.fromCharCode(__readUInt16LE(this, loc)); loc+=2; }
|
|
size *= 2;
|
|
} else switch(size) {
|
|
case 1: o = __readUInt8(this, this.l); break;
|
|
case 2: o = (t === 'i' ? __readInt16LE : __readUInt16LE)(this, this.l); break;
|
|
case 4: o = __readUInt32LE(this, this.l); break;
|
|
case 8: if(t === 'f') { o = __double(this, this.l); break; }
|
|
}
|
|
this.l+=size; return o;
|
|
}
|
|
|
|
function WriteShift(t, val, f) {
|
|
var size, i;
|
|
if(f === 'dbcs') {
|
|
for(i = 0; i != val.length; ++i) this.writeUInt16LE(val.charCodeAt(i), this.l + 2 * i);
|
|
size = 2 * val.length;
|
|
} else switch(t) {
|
|
case 1: size = 1; this[this.l] = val&255; break;
|
|
case 3: size = 3; this[this.l+2] = val & 255; val >>>= 8; this[this.l+1] = val&255; val >>>= 8; this[this.l] = val&255; break;
|
|
case 4: size = 4; this.writeUInt32LE(val, this.l); break;
|
|
case 8: size = 8; if(f === 'f') { this.writeDoubleLE(val, this.l); break; }
|
|
/* falls through */
|
|
case 16: break;
|
|
case -4: size = 4; this.writeInt32LE(val, this.l); break;
|
|
}
|
|
this.l += size; return this;
|
|
}
|
|
|
|
function prep_blob(blob, pos) {
|
|
blob.l = pos;
|
|
blob.read_shift = ReadShift;
|
|
blob.write_shift = WriteShift;
|
|
}
|
|
|
|
function parsenoop(blob, length) { blob.l += length; }
|
|
|
|
function writenoop(blob, length) { blob.l += length; }
|
|
|
|
function new_buf(sz) {
|
|
var o = has_buf ? new Buffer(sz) : new Array(sz);
|
|
prep_blob(o, 0);
|
|
return o;
|
|
}
|
|
|