Header-only C client for the ClickHouse Native wire format — the Native Protocol over TCP carrying Native Format blocks. One core header, plus optional follow-up headers for TCP, compression, codecs, and I/O backends.
Designed for embedding inside PostgreSQL extensions (palloc arena, longjmp) but with no PG-specific code. Including clickhouse.h alone gives a pure block decoder over caller-supplied chc_io, usable for reading clickhouse-local's FORMAT Native from a pipe with no TCP, no compression, no link-time deps beyond libc.
Without it, the server emits binary type tags & chc_block_read returns CHC_ERR_TYPE.
clickhouse-c is distributed as a flat set of headers: each header contains both declarations & implementation, guarded by a sentinel macro. Exactly one translation unit per consumer defines the implementation macro & includes headers; everyone else includes for declarations only.
