fix(NODE-6818): flip byte order depending on system endianness

[nbbeeken]

Description

What is changing?

Is there new documentation needed for these changes?

What is the motivation for this change?

Release Highlight

Fixed float byte-wise handling on big-endian systems

Caution

Among the platforms BSON and the MongoDB driver support this issue impacts s390x big-endian systems. x86, ARM, and other little-endian systems are not affected. Existing versions of the driver can be upgraded to this release.

A recent change to the BSON library started parsing and serializing floats using a Float64Array. When reading the bytes from this array the ordering is dependent on the platform it is running on and we now properly account for that ordering.

Double check the following

• Ran npm run check:lint script
• Self-review completed using the steps outlined here
• PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• Changes are covered by tests
• New TODOs have a related JIRA ticket

[nbbeeken]

https://spruce.mongodb.com/version/67c8d4281b65e60007a1b6c6