Jens Geyer created THRIFT-6065:
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Summary: Haxe TMemoryStream cannot be written to (fixed-size
buffer, uninitialized Position)
Key: THRIFT-6065
URL: https://issues.apache.org/jira/browse/THRIFT-6065
Project: Thrift
Issue Type: Bug
Components: Haxe - Library
Reporter: Jens Geyer
TMemoryStream (lib/haxe/src/org/apache/thrift/transport/TMemoryStream.hx)
cannot be written to.
Its Write() does Data.set(Position + i, ...) into a fixed-size Bytes, which
cannot grow, so writing to a freshly constructed stream is out of bounds. On
the neko target the no-argument constructor never initializes Position, so the
first write throws "Invalid operation (+)". Write() also never advances
Position, and the constructor leaves Position at the end of any supplied data,
so a stream built from existing bytes cannot be read without first resetting
Position = 0.
Fix: back the stream with a growable buffer (capacity doubling) so writing past
the current end enlarges the backing Bytes and advances Position, track the
logical length separately for Read/Peek, and always initialize Position = 0.
This lets a single TMemoryStream be used for an in-memory write-then-read
round-trip (write, set Position = 0, read), as an alternative to a temporary
file via TFileStream.
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