Add ISO/IEC 8211 writer/encoder and builders (#12)#13
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Implement a first-class writer/encoder for EncDotNet.Iso8211 as the symmetric inverse of the existing reader, enabling downstream serialization of documents back to .000 cells. Round-trip surface: - Iso8211DocumentWriter: Write(doc)->byte[], Write(Stream), WriteAsync, WriteToFile/WriteToFileAsync. Byte-identical for canonical sources. - Iso8211RecordWriter: encodes one record (leader/directory/field area). - Iso8211WriterOptions: lexical level, encoding, entry-map auto-sizing. Construction-from-scratch: - Iso8211SubfieldEncoder: encodes every Iso8211SubfieldFormatType (inverse of the reader's ConvertValue). - Iso8211FieldBuilder / Iso8211RecordBuilder / Iso8211DocumentBuilder: fluent builders mirroring reader subfield sequencing and UT placement. - Iso8211DataDescriptiveRecordWriter: encodes DDR field definitions. Tests: byte-identical round-trips, builder Write->Read, per-format encode/decode, DDR encode->read, stream/file overloads, and an opt-in corpus round-trip (skips without ISO8211_CORPUS_DIR). No breaking changes to reader APIs; XML docs on all new public types. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: ead2ac19-7b31-431f-84c2-edb303f789fe
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Adds a first-class ISO/IEC 8211 writer/encoder — the symmetric inverse of the existing reader — so datasets can be produced, not just parsed. Closes #12.
What's new (8 source files under
src/EncDotNet.Iso8211, no breaking changes to reader APIs)Iso8211DocumentWriter—Write(doc) → byte[],Write(Stream)/WriteAsync,WriteToFile/WriteToFileAsync. Round-trippable and byte-identical for canonically-encoded sources (recomputes only directory / base address / record length).Iso8211RecordWriter— encodes one record (leader + directory + field area).Iso8211SubfieldEncoder— inverse of the reader'sConvertValue; handles everyIso8211SubfieldFormatType(fixed/variable char, ASCII int/real, signed/unsigned/floating binary little-endian at declared widths, bit strings).Iso8211FieldBuilder/Iso8211RecordBuilder/Iso8211DocumentBuilder— fluent construction from scratch, mirroring reader subfield sequencing, repeating-group wrap, and UT/FT placement.Iso8211DataDescriptiveRecordWriter— DDR encoder (field controls + descriptors + format controls, canonical 2-UT layout).Iso8211WriterOptions— lexical level, encoding (ASCII default), directory entry auto-sizing.Tests
Byte-identical round-trips, builder Write→Read model equivalence, per-format encode/decode, DDR encode→read, stream/file overloads, plus an opt-in corpus round-trip that self-skips unless
ISO8211_CORPUS_DIRis set. Full suite: 469 passed, 0 failed. Builds clean fornet8.0;net10.0. XML docs on all new public types; README updated with a writing/builders section.Motivation
Unblocks downstream
philliphoff/EncDotNet.S100, which needs to serialize anS101Documentback to a.000cell for ans100 s57 convertcommand.