Skip to content

[Java] implement a better fix for an out of bounds exception #865

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
merged 1 commit into from
Sep 20, 2025
Merged

[Java] implement a better fix for an out of bounds exception #865

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
14 changes: 9 additions & 5 deletions java/src/json/ext/SWARBasicStringEncoder.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,9 +23,13 @@ void encode(ByteList src) throws IOException {
int beg = 0;
int pos = 0;

ByteBuffer bb = ByteBuffer.wrap(ptrBytes, 0, len);
while (ptr + pos + 8 <= len) {
long x = bb.getLong(ptr + pos);
// There are optimizations in JRuby where ptr > 0 will be true. For example, if we
// slice a string, the underlying byte array is the same, but the
// begin index and real size are different. When reading from the ptrBytes
// array, we need to always add ptr to the index.
ByteBuffer bb = ByteBuffer.wrap(ptrBytes, ptr, len);
while (pos + 8 <= len) {
long x = bb.getLong(pos);
if (skipChunk(x)) {
pos += 8;
continue;
Expand All @@ -43,8 +47,8 @@ void encode(ByteList src) throws IOException {
}
}

if (ptr + pos + 4 <= len) {
int x = bb.getInt(ptr + pos);
if (pos + 4 <= len) {
int x = bb.getInt(pos);
if (skipChunk(x)) {
pos += 4;
}
Expand Down
Loading