Ryan Malloy
15fa553c0e
Clean-room DE binary reader (~400 lines C) with Chebyshev/Clenshaw evaluation — no GPL dependency on jpl_eph. Per-backend lazy initialization preserves PARALLEL SAFE. Existing VSOP87/ELP82B functions stay IMMUTABLE; new _de() variants are STABLE with automatic fallback to compiled-in ephemerides on any DE failure. Implementation: - de_reader.c: header parse, record seek, Clenshaw recurrence - eph_provider.c: GUC (pg_orbit.ephemeris_path), lazy init, ICRS-to-ecliptic frame rotation, on_proc_exit cleanup - de_funcs.c: 11 new SQL functions (_de variants + diagnostics) - Constant chain of custody rules 6-8 (frame rotation, same-provider, AU consistency) Extract observe_from_geocentric() to astro_math.h for shared use by planet_funcs.c, moon_funcs.c, and de_funcs.c. 57 → 68 functions, 11 → 12 regression test suites, all passing.
5 lines
147 B
Plaintext
5 lines
147 B
Plaintext
comment = 'Orbital mechanics types and functions for PostgreSQL'
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default_version = '0.3.0'
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module_pathname = '$libdir/pg_orbit'
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relocatable = true
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