Skip to content

[ntuple] Add option to preserve BigInt precision for Int64/UInt64 fields #418

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
linev merged 1 commit into from
Aug 14, 2026
Merged

[ntuple] Add option to preserve BigInt precision for Int64/UInt64 fields #418

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
13 changes: 7 additions & 6 deletions modules/rntuple.mjs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -757,14 +757,15 @@ async function readHeaderFooter(tuple) {

class ReaderItem {

constructor(column, name) {
constructor(column, name, preserveBigInt) {
this.column = null;
this.name = name;
this.id = -1;
this.coltype = 0;
this.sz = 0;
this.simple = true;
this.page = -1; // current page for the reading
this.preserveBigInt = preserveBigInt; // keep precision of bigint

if (column?.coltype !== undefined) {
this.column = column;
Expand Down Expand Up @@ -914,16 +915,16 @@ class ReaderItem {
case kInt64:
case kIndex64:
this.func = function(obj) {
// FIXME: let process BigInt in the TTree::Draw
obj[this.name] = Number(this.view.getBigInt64(this.o, LITTLE_ENDIAN));
const val = this.view.getBigInt64(this.o, LITTLE_ENDIAN);
obj[this.name] = this.preserveBigInt ? val : Number(val);
this.shift_o(8);
};
this.sz = 8;
break;
case kUInt64:
this.func = function(obj) {
// FIXME: let process BigInt in the TTree::Draw
obj[this.name] = Number(this.view.getBigUint64(this.o, LITTLE_ENDIAN));
const val = this.view.getBigUint64(this.o, LITTLE_ENDIAN);
obj[this.name] = this.preserveBigInt ? val : Number(val);
this.shift_o(8);
};
this.sz = 8;
Expand Down Expand Up @@ -1446,7 +1447,7 @@ async function rntupleProcess(rntuple, selector, args = {}) {
}

function addColumnReadout(column, tgtname) {
const item = new ReaderItem(column, tgtname);
const item = new ReaderItem(column, tgtname, args.preserveBigInt);
item.assignReadFunc();
handle.columns.push(item);
return item;
Expand Down
Loading