src Directory Reference

Files
	fdl_abi.cpp
	ABI version function implementation (returns compile-time version macros).
	fdl_accessors_api.cpp
	C ABI field accessors with thread-local string buffering and per-document mutex locking.
	fdl_builder.cpp
	Builder functions: construct ojson objects with keys in canonical order.
	fdl_builder.h
	Internal helpers for constructing FDL JSON objects with canonical key order.
	fdl_builder_api.cpp
	C ABI wrappers for the document builder (create, add, set, remove operations).
	fdl_canonical.cpp
	Canonical JSON serialization – null stripping, key reordering per FDL spec, formatting.
	fdl_canonical.h
	Canonical JSON serialization — key ordering, null stripping, formatting.
	fdl_collection_helpers.h
	Template helpers for collection traversal (count, at, find_by_field).
	fdl_collections_api.cpp
	C ABI for collection traversal (count, at, find_by_id/label) and handle allocation.
	fdl_compat.h
	Cross-platform portability macros.
	fdl_constants.h
	Named constants replacing magic numbers throughout the FDL core library.
	fdl_custom_attr.cpp
	Shared implementation of custom attribute operations on ojson nodes.
	fdl_custom_attr.h
	Internal helpers for custom attribute operations on ojson nodes.
	fdl_custom_attr_api.cpp
	C ABI wrappers for custom attribute operations on all handle types.
	fdl_doc.cpp
	Document class implementation – parsing, header accessors, canonical serialization.
	fdl_doc.h
	Internal Document class and opaque fdl_doc handle definition.
	fdl_doc_api.cpp
	C ABI wrappers for document creation, parsing, serialization, and memory management.
	fdl_enum_map.h
	Bidirectional string<->enum conversions for FDL enumerated types.
	fdl_framing.cpp
	Framing-from-intent computation — aspect ratio fitting with protection.
	fdl_framing.h
	Internal implementation of framing-from-intent computation.
	fdl_framing_api.cpp
	C ABI wrapper for framing-from-intent computation and related handle-based operations.
	fdl_geometry.cpp
	Geometry operations on the 4-layer FDL dimension hierarchy.
	fdl_geometry.h
	Internal geometry operations on the 4-layer FDL dimension hierarchy.
	fdl_geometry_api.cpp
	C ABI wrappers for geometry operations.
	fdl_handles.cpp
	Handle node() resolution – lazy index-based lookup into the document ojson tree.
	fdl_handles.h
	Internal handle types and handle cache for opaque FDL sub-objects.
	fdl_pipeline.cpp
	Pipeline helper implementations: scale factor, output sizing, alignment shift, dimension clamping.
	fdl_pipeline.h
	Internal pipeline helper functions for template application.
	fdl_pipeline_api.cpp
	C ABI wrappers for pipeline helper functions.
	fdl_rounding.cpp
	FDL rounding functions (round, round_dimensions, round_point) using banker's rounding.
	fdl_rounding.h
	Banker's rounding (half-to-even) implementation.
	fdl_template.cpp
	Canvas template application — the full transformation pipeline.
	fdl_template.h
	Internal implementation of canvas template application.
	fdl_template_api.cpp
	C ABI wrapper for canvas template application and result management.
	fdl_tl_cache.h
	Bounded thread-local string cache with automatic eviction.
	fdl_validate.cpp
	Schema (Draft 2020-12) and semantic validation using embedded schema data.
	fdl_validate.h
	Internal validation — JSON Schema + semantic checks.
	fdl_validate_api.cpp
	C ABI wrappers for document validation.
	fdl_value_types.cpp
	Value-type operations: dimensions arithmetic, point arithmetic, floating-point comparison.