File List

Here is a list of all files with brief descriptions:

[detail level 123456]

▼ include
▼ openswmm
► engine
openswmm_2d.h	Optional 2D surface routing module — C API
openswmm_callbacks.h	Callback function typedefs for the OpenSWMM Engine C API
openswmm_climate.h	OpenSWMM Engine — Climatology configuration C API
openswmm_controls.h	OpenSWMM Engine — Control Rules C API
openswmm_datetime.h	OpenSWMM Engine — SWMM DateTime conversion utilities (C API)
openswmm_edit.h	OpenSWMM Engine — Model editing C API (deletion and type conversion)
openswmm_engine.h	OpenSWMM Engine — primary transparent C API (master header)
openswmm_engine_export.h
openswmm_forcing.h	Runtime forcing API — inject fluxes with mass-balance tracking
openswmm_gages.h	OpenSWMM Engine — Rain Gage C API
openswmm_geopackage.h	OpenSWMM Engine — GeoPackage C API
openswmm_gw2d.h	G-step 19 — the two-zone groundwater kernel's C API: authoring the [2D_AQUIFER*] rows, and reading the state and ledger while a run is in flight
openswmm_gw_transport.h	U4 (2026-09-07) — C API for the [GW_*] subsurface-transport authoring sections
openswmm_heat.h	Heat-transport configuration as an editable surface (phase H6a)
openswmm_hotstart.h	Hot start file management — transparent C API
openswmm_infil2d.h	Per-cell infiltration for the 2D overland-flow mesh — C API
openswmm_inflows.h	OpenSWMM Engine — Inflows (External, DWF, RDII) C API
openswmm_infrastructure.h	OpenSWMM Engine — Infrastructure (Transects, Streets, Inlets, LIDs) C API
openswmm_initial_quality.h	C API — [INITIAL_QUALITY] per-element initial concentrations (E-A4)
openswmm_links.h	OpenSWMM Engine — Link (conduit/pump/orifice/weir/outlet) C API
openswmm_massbalance.h	OpenSWMM Engine — Mass Balance / Continuity C API
openswmm_model.h	OpenSWMM Engine — Model building and options C API
openswmm_nodes.h	OpenSWMM Engine — Node C API
openswmm_output.h	OpenSWMM Engine — Output File Reader C API
openswmm_pollutants.h	OpenSWMM Engine — Pollutant / Water Quality C API
openswmm_process_components.h	C API — [PROCESS_COMPONENTS] registrations (E-C3 subset of the transport IO plan §5): enumerate, find, register, remove
openswmm_quality.h	OpenSWMM Engine — Water Quality (Landuse / Buildup / Washoff / Treatment) C API
openswmm_reactions.h	C API — the reaction system ([REACTION_*] / .rxn) surface for GUI editors (E-C1: validation + discovery)
openswmm_spatial.h	OpenSWMM Engine — Spatial Frame C API
openswmm_statistics.h	OpenSWMM Engine — Statistics Query C API
openswmm_subcatchments.h	OpenSWMM Engine — Subcatchment C API
openswmm_tables.h	OpenSWMM Engine — Tables (Time Series & Curves) and Patterns C API
openswmm_transport.h	E6 — the ARD transport configuration surface ([TRANSPORT_OPTIONS], [TRANSPORT_BOUNDARIES], [TRANSPORT_SOURCES])
openswmm_water_age.h	Water-age source-table CRUD (subplan X5 = water-age plan A6, the minimal GUI-facing subset; TRANSPORT_QUALITY_GUI_PLAN §6 prereq 5)
openswmm_xsect.h	OpenSWMM Engine — standalone cross-section geometry C API
► legacy
► engine
openswmm_legacy_solver_export.h
openswmm_solver.h
► output
openswmm_output.h	Header file for SWMM output API
openswmm_output_enums.h	Header file for SWMM output API enumeration types
► plugin_sdk
IInputPlugin.hpp	Interface for input file reader/writer plugins
IOutputPlugin.hpp	Interface for output-writing plugins
IPluginComponentInfo.hpp	Interface that describes a plugin component — metadata and factory methods
IReportPlugin.hpp	Interface for report-writing plugins
IStateIOPlugin.hpp	Interface for state / hot-start IO plugins
PluginDiscovery.hpp	Public, framework-free facade for enumerating plugin file filters
PluginState.hpp	Plugin lifecycle state enumerator
SimulationSnapshot.hpp	Read-only snapshot of simulation state passed to plugins
▼ manuals
application
▼ reference
► hydraulics
sections
► hydrology
sections
► quality
sections
▼ user
manual
▼ src
▼ engine
► 2d
► api
Api2D.cpp	C API implementation for the 2D surface routing module
Api2D.hpp	C API implementation bridge for the 2D surface routing module
ApiGw2D.cpp	G-step 19 — implementation of openswmm_gw2d.h
ApiGwTransport.cpp	U4 — implementation of openswmm_gw_transport.h
ApiInfil2D.cpp	C API implementation for 2D per-cell infiltration (plan §5.5.6, I6)
► coupling
NodeCoupling.cpp	Implementation of 2D↔1D node coupling via orifice exchange
NodeCoupling.hpp	Orifice-equation exchange between 2D surface and SWMM nodes
► data
BoundaryData.hpp	Structure-of-Arrays (SoA) storage for 2D mesh boundary conditions
MeshData.hpp	Structure-of-Arrays (SoA) storage for 2D triangular mesh geometry
PendingRows2D.hpp	Parse-time scratch rows for [2D_BOUNDARY_CONDITIONS] and [2D_EDGE_CONVEYANCE] input sections
Report2DVars.hpp	Header-only token ↔ bitmask helpers for [2D_OPTIONS] REPORT_2D_VARIABLES / REPORT_2D_SPECIES / REPORT_2D_STEP
Serialize2D.hpp	Header-only helpers shared by 2D model serialization consumers (InpWriter [2D_*] emission, GeoPackage writer)
SolverOptions2D.hpp	Configuration options for the 2D surface routing solver
SurfaceStateData.hpp	Structure-of-Arrays (SoA) storage for 2D surface routing state
SurfaceTransportState.hpp	Overland transport S1 — per-cell species MASS on the 2D surface
► gpu
ExplicitKokkosSurfaceSolver.cpp	Kokkos port of the explicit local-inertial LTS marcher
ExplicitKokkosSurfaceSolver.hpp	Kokkos (OpenMP/CUDA/HIP/SYCL) port of the explicit local-inertial FV marcher with tiered local timestepping
GpuPluginCuda.cpp	Plugin entry points for the Phase 2 Kokkos/CUDA surface solver
GpuPluginHip.cpp	Plugin entry points for the Phase 5 Kokkos/HIP surface solver (AMD)
GpuPluginOmp.cpp	Plugin entry points for the Phase 1 Kokkos/OpenMP surface solver
GpuPluginStub.cpp	Placeholder GPU surface-solver plugin (Phase 0 scaffold)
GpuPluginSycl.cpp	Plugin entry points for the Phase 5 Kokkos/SYCL surface solver (Intel)
KokkosPerfCounters.hpp	OPENSWMM_PERF=1 launch/fence/deep_copy counters for the Kokkos surface solver, riding the in-process Kokkos::Tools callbacks
KokkosTypes.hpp	Execution-space selection + view aliases for the Kokkos marcher plugin
► gw
GwTransportData.hpp	U4 (2026-09-07) — authoring state for subsurface (groundwater) transport: [GW_TRANSPORT_OPTIONS], [GW_TRANSPORT_PARAMS], [GW_SORPTION], [GW_INITIAL_QUALITY], [GW_BOUNDARY_QUALITY] and [GW_SOURCES]
GwTransportSections.cpp	U4 — [GW_*] parsers, registration and resolution (see header)
GwTransportSections.hpp	U4 (2026-09-07) — parsers and registration for the [GW_*] subsurface-transport authoring sections. See GwTransportData.hpp for the shape and the authoring-only contract
► infil
Infil2D.cpp	Per-cell infiltration for the 2D overland-flow mesh (track I)
Infil2D.hpp	Per-cell infiltration for the 2D overland-flow mesh (track I)
► input
SectionHandlers2D.cpp	Implementation of 2D input section parsers
SectionHandlers2D.hpp	Input section parsers for the 2D surface routing module
► mesh
MeshBuilder.cpp	Implementation of mesh topology construction and geometry computation
MeshBuilder.hpp	Topology construction and geometry precomputation for the 2D mesh
QuadVfr.hpp	Volume–free-surface relationship (VFR) for a quadrilateral cell
RainfallInterpolator.cpp	Implementation of natural-neighbour / IDW rainfall interpolation
RainfallInterpolator.hpp	Static per-cell weights mapping raingage rainfall onto the 2D mesh
VertexReconstruction.cpp	Implementation of pseudo-Laplacian vertex stencil construction and head reconstruction
VertexReconstruction.hpp	Pseudo-Laplacian vertex reconstruction stencil computation
VfrClosure.hpp	Volume–free-surface (VFR) closure for a planar-bed triangular cell
► output
Default2DOutputPlugin.cpp	HDF5 output plugin for 2D surface routing results (CF/UGRID)
Default2DOutputPlugin.hpp	Built-in HDF5 output plugin for 2D surface routing results
► solver
DiffusiveKernels.hpp	Face law and step bound for MOMENTUM_EQUATION DIFFUSIVE_WAVE (plans/2D_FULL_SWE_SHOCK_CAPTURING_PLAN_2026-09-05.md §2.3)
ExplicitInertialSolver.cpp	Implementation of the explicit local-inertial FV marcher with power-of-two tiered local timestepping (LTS)
ExplicitInertialSolver.hpp	Explicit local-inertial FV time-marcher for the 2D surface
GpuPluginAbi.h	Stable C ABI between the core engine and an optional GPU solver plugin
InertialEdges.cpp	Implementation of the unique interior-edge builder
InertialEdges.hpp	Unique interior-edge structure for the local-inertial momentum DOFs
InertialKernels.hpp	Single-source flat kernels for the explicit local-inertial marcher
ISurfaceSolver.hpp	Backend-neutral interface for the 2D surface-routing time integrator
SurfaceFluxCalculator.cpp	Implementation of gradient computation, slope limiting, and edge fluxes
SurfaceFluxCalculator.hpp	Edge flux computation, gradient calculation, and slope limiting
SurfaceSolverFactory.cpp	Implementation of runtime 2D surface-solver backend selection
SurfaceSolverFactory.hpp	Runtime selection of the 2D surface solver backend (Phase 4)
SweKernels.hpp	Face kernels for MOMENTUM_EQUATION FULL_SWE — the conservative shallow-water equations with the convective term and shock capturing (plans/2D_FULL_SWE_SHOCK_CAPTURING_PLAN_2026-09-05.md §2.2)
► subsurface
SigmaColumn.cpp	G-steps 4 and 5 — see the header for the coordinate, the flux forms and the handover convention
SigmaColumn.hpp	G-steps 4 and 5 — closure B: the σ-coordinate explicit unsaturated column with a moving lower boundary (the water table)
SoilCharacteristic.cpp	G-steps 2 and 13 — see the header, especially its
SoilCharacteristic.hpp	G-steps 2 and 13 — the four production soil-characteristic laws and the closure-A quasi-steady recharge q₀(hᵤ, h_g)
SubsurfaceData.cpp	Sizing, storage accounting and token round-trip for the two-zone groundwater state (G-step 1)
SubsurfaceData.hpp	G-step 1 — state, parameters and options for the two-zone groundwater kernel (TWO_ZONE_GROUNDWATER_EXPLICIT_LTS_PLAN §4)
SubsurfaceSections.cpp	Parsers, resolution and writer for the [2D_AQUIFER*] sections
SubsurfaceSections.hpp	G-step 1 — [2D_AQUIFER_OPTIONS], [2D_AQUIFER] and [2D_AQUIFER_NODE]: parsing, unit resolution and writing
SubsurfaceSolver.cpp	The two-zone groundwater kernel (G-steps 3, 6-12, 14, 16)
SubsurfaceSolver.hpp	G-steps 3, 6-12, 16 — the two-zone groundwater kernel: saturated FV update, lateral Darcy, closure dispatch, node exchange, Dunne transfer, ET, and the LTS tier hooks the surface marcher calls
SurfaceRouter2D.cpp	Implementation of the 2D surface routing orchestrator
SurfaceRouter2D.hpp	Top-level orchestrator for the optional 2D surface routing module
► controls
Controls.cpp	Rule-based control engine — full legacy parity implementation
Controls.hpp	Rule-based control engine — full legacy parity
► core
charconv_compat.hpp	Portable from_chars for floating-point types
Constants.hpp	Global physical, numerical, and model constants for OpenSWMM Engine
DateTime.hpp	DateTime utility functions — numerically identical to legacy datetime.c
ErrorCodes.cpp	Error/warning description table and formatting — legacy-compatible
ErrorCodes.hpp	Legacy-compatible error and warning codes with description lookup
FilePathPair.hpp	Carrier for an external file reference in a SWMM model
HotStartManager.cpp	Hot start file I/O — implementation
HotStartManager.hpp	Hot start file manager — in-memory representation + I/O
InpWriter.cpp	Comprehensive .inp serialisation — round-trip identical output
InpWriter.hpp	Write a SimulationContext to a SWMM .inp file
InterfaceFile.cpp	Routing interface file — coupling between separate SWMM simulations
InterfaceFile.hpp	Routing interface file — coupling between separate SWMM simulations
openswmm_api_common.hpp	Internal shared helpers for C API impl files
openswmm_climate_impl.cpp	C API implementation — climatology configuration get/set
openswmm_controls_impl.cpp	C API implementation — control rules and direct link control actions
openswmm_datetime_impl.cpp	C API implementation — SWMM DateTime encode/decode utilities
openswmm_edit_impl.cpp	C API implementation — object deletion and type conversion
openswmm_engine_impl.cpp	C API implementation — engine lifecycle, callbacks, errors, timing
openswmm_forcing_impl.cpp	C API implementation — runtime forcing with mass-balance tracking
openswmm_gages_impl.cpp	C API implementation — rain gage identity, creation, properties, state, bulk
openswmm_heat_impl.cpp	Heat-configuration C API (phase H6a)
openswmm_hotstart_impl.cpp	Hot start C API implementation — thin wrappers around HotStartManager
openswmm_inflows_impl.cpp	C API implementation — external inflows, DWF, RDII
openswmm_infrastructure_impl.cpp	C API implementation — transects, streets, inlets, LID controls, LID usage
openswmm_initial_quality_impl.cpp	C API implementation — [INITIAL_QUALITY] per-element rows (E-A4)
openswmm_links_impl.cpp	C API implementation — link identity, creation, properties, state, bulk
openswmm_massbalance_impl.cpp	C API implementation — continuity errors and flux totals
openswmm_model_impl.cpp	C API implementation — model building, options, user flags, CRS
openswmm_nodes_impl.cpp	C API implementation — node identity, creation, properties, state, bulk
openswmm_pollutants_impl.cpp	C API implementation — pollutant identity, creation, properties, quality injection
openswmm_process_components_impl.cpp	C API implementation — [PROCESS_COMPONENTS] registrations (E-C3)
openswmm_quality_impl.cpp	C API implementation — landuse, buildup, washoff, treatment
openswmm_reactions_impl.cpp	C API implementation — reaction-system validation + discovery (E-C1)
openswmm_spatial_impl.cpp	C API implementation — spatial frame: CRS, coordinates, vertices, polygons
openswmm_statistics_impl.cpp	C API implementation — node, link, subcatchment statistics queries
openswmm_subcatchments_impl.cpp	C API implementation — subcatchment identity, creation, properties, state, bulk
openswmm_tables_impl.cpp	C API implementation — tables (time series, curves) and patterns
openswmm_transport_impl.cpp	E6 — ARD transport configuration surface. See the header for the read-only-rows decision and its reason
openswmm_water_age_impl.cpp	Water-age source-table CRUD implementation (subplan X5)
openswmm_xsect_impl.cpp	C API implementation — standalone cross-section geometry
PathResolver.cpp	PathResolver implementation — see PathResolver.hpp
PathResolver.hpp	Pure-function path normalisation and relative-path math
PerfTimers.hpp
SimulationContext.hpp	The central, reentrant simulation context for the new engine
SimulationOptions.hpp	Simulation options parsed from the [OPTIONS] section
SpatialFrame.hpp	Spatial frame — CRS specification and coordinate data for nodes/links
StringCase.hpp	Case-insensitive string helpers matching legacy SWMM name semantics
ThreadInfo.cpp	Process-wide hardware / OpenMP thread capability query
ThreadInfo.hpp	Process-wide hardware / OpenMP thread capability query
TypeHelpers.hpp	Shared C↔internal type mapping utilities for node and link type enums
UnitConversion.cpp	Global unit conversion — matching legacy SWMM UCF()
UnitConversion.hpp	Global unit conversion factors — matching legacy SWMM Ucf[]/Qcf[]
UserFlags.hpp	User-defined model flags (InfoWorks ICM-style, two-section design)
► data
ArdConfigData.hpp	Parsed configuration of the Eulerian ARD transport component (org.hydrocouple.openswmm.transport.ard, config file model.ard)
BedZoneData.hpp	Plan H6b — the bed / hyporheic transient-storage zone
ForcingData.hpp	Per-element runtime forcing state — SoA layout
GageData.hpp	Structure-of-Arrays (SoA) storage for rain gages
HeatData.hpp	Heat-transport data (heat plan §1, §3; phase H1)
HeatOverrideData.hpp	Plan PE — per-element radiative and bed attributes
HydrologyData.hpp	SoA stores for snowpacks, aquifers, LID controls, and LID usage
InflowData.hpp	SoA stores for external inflows, DWF, RDII, and time patterns
InfraData.hpp	SoA stores for transects, streets, inlets, and control rules
InitialQualityData.hpp	SoA store for [INITIAL_QUALITY] per-element initial concentrations
LidLayerSpeciesData.hpp	Phase A4 — per-(LID unit, layer, species) transported state
LinkData.hpp	Structure-of-Arrays (SoA) storage for all link types
LinkSubtypes.hpp	Relational (normalized) Structure-of-Arrays side-tables for link subtypes
NameIndex.hpp	O(1) name-to-index lookup for SWMM objects
NodeData.hpp	Structure-of-Arrays (SoA) storage for all node types
NodeSubtypes.hpp	Relational (normalized) Structure-of-Arrays side-tables for node subtypes
PollutantData.hpp	Structure-of-Arrays (SoA) storage for pollutants and water quality
QualityData.hpp	SoA stores for land uses, buildup, washoff, and treatment
ReactionData.hpp	Multispecies reaction system data (EPANET-MSX conventions) — SoA, hot/cold split per LARD plan §16 D-L3 / reactions plan D-R3
ReactionTokens.hpp	POD reaction-VM instruction + span types (phase R2, D-L3 flat pool). Data-layer header: no dependencies, included by both ReactionData (which owns the pool) and the transport-side compiler/evaluator (ReactionExpression)
SpeciesRegistry.hpp	Single source of truth for all transported constituents (Unified Transport master plan §4.1; phase T0a)
StorageGeometry.hpp	Storage-shape raw parameters ⇄ area-relation coefficients, and the INP/GeoPackage keywords for each shape
SubcatchData.hpp	Structure-of-Arrays (SoA) storage for subcatchments
TableData.cpp	File-backed I/O, cache management, validation, and multicolumn lookup for Table/TableData
TableData.hpp	Time series and rating curve data with bidirectional cursor
WaterAgeData.hpp	Water-age tracking data (water age plan §1–§2, phase A1a)
► edit
ObjectDeleter.cpp	Implementation of object deletion and cascade analysis
ObjectDeleter.hpp	Internal C++ API for object deletion and cascade analysis
TypeConverter.cpp	In-place node and link type conversion
TypeConverter.hpp	Internal C++ API for in-place node and link type conversion
VirtualJunctionOps.cpp	Virtual-junction rule validation, flag editing, split and fusion
VirtualJunctionOps.hpp	Internal C++ API for virtual-junction editing: rule validation, derived geometry, set/clear flag, conduit split and pair re-fusion
► hydraulics
► fv
ExplicitFvSolver.cpp	Implementation of the CPU explicit finite-volume 1D network solver
ExplicitFvSolver.hpp	Serial/OpenMP CPU reference implementation of the explicit FV 1D solver
FvKernels.hpp	Single-source scalar kernels for the explicit FV 1D network solver
FvOptions.hpp	Option struct for the explicit finite-volume 1D network solver
INetworkSolver.hpp	Backend-neutral interface for the explicit FV 1D network integrator
NetworkMeshBuilder.cpp	Implementation of the FV network mesh construction
NetworkMeshBuilder.hpp	Build the FV cell/face mesh from a SimulationContext
NetworkMeshData.hpp	SoA storage for the 1D finite-volume network mesh and its state
NetworkSolverFactory.cpp	Implementation of runtime FV backend selection
NetworkSolverFactory.hpp	Runtime backend selection for the explicit FV 1D network solver
PressurizedHeadSolver.cpp	Implementation of the R2a implicit pressurized head update
PressurizedHeadSolver.hpp	Implicit acoustic/slot head update on the pressurized subset (slot program R2a, Strategy E)
Culvert.cpp	Culvert inlet control — numerically identical to legacy culvert.c
Culvert.hpp	Culvert inlet control — FHWA HEC-5 equations
Divider.cpp	Flow divider node logic — legacy-faithful divider_getOutflow
Divider.hpp	Flow divider node logic — cutoff, overflow, tabular, weir
DynamicWave.cpp	Dynamic wave routing – batch-oriented St. Venant equations
DynamicWave.hpp	Dynamic wave routing solver — batch-oriented St. Venant equations
Exfiltration.cpp	Storage exfiltration — numerically identical to legacy exfil.c
Exfiltration.hpp	Storage node exfiltration — Green-Ampt bottom/bank seepage
ForceMain.cpp	Force main friction — numerically identical to legacy forcmain.c
ForceMain.hpp	Force main friction — Hazen-Williams and Darcy-Weisbach
HydClosureKernels.hpp	Portable scalar closures shared by the host solvers and the device backend: FHWA HEC-5 culvert inlet control and force-main friction
HydStructures.cpp	Non-conduit link flow — batch by type, numerically identical to legacy
HydStructures.hpp	Non-conduit link flow: pumps, orifices, weirs, outlets
Inlet.cpp	Street inlet capture — numerically identical to legacy inlet.c
Inlet.hpp	Street inlet capture efficiency — FHWA HEC-22
KinematicWave.cpp	Kinematic wave routing — batch-oriented, numerically identical to legacy
KinematicWave.hpp	Kinematic wave routing solver — batch-oriented design
Link.cpp	Link hydraulics — numerically identical to legacy link.c
Link.hpp	Link hydraulics — velocity, Froude, Manning conveyance, settings
Node.cpp	Node hydraulics — numerically identical to legacy node.c
Node.hpp	Node hydraulics — volume/depth/head conversions, surface area, overflow
Outfall.cpp	Outfall boundary depths — matching legacy link_setOutfallDepth / outfall_setOutletDepth
Outfall.hpp	Outfall boundary depth computation — free/normal/fixed/tidal/timeseries
Roadway.cpp	Roadway weir overflow — numerically identical to legacy roadway.c
Roadway.hpp	Roadway weir overflow — FHWA HDS-5
Routing.cpp	Top-level routing dispatcher
Routing.hpp	Top-level routing dispatcher — KW / DW / Steady-state
Street.cpp	Street cross-section — numerically identical to legacy street.c
Street.hpp	Street cross-section geometry — gutter + road crown + backing
TimestepController.cpp	Explicit next-timestep computation — implementation
TimestepController.hpp	Explicit next-timestep computation for the new engine
TopoSort.cpp	Topological sort — Kahn's algorithm, numerically identical to legacy
TopoSort.hpp	Topological sort of network links for KW/steady-state routing
Transect.cpp	Irregular transect — numerically identical to legacy transect.c
Transect.hpp	Irregular transect cross-section geometry (HEC-2 style)
xsect_tables.hpp	Cross-section lookup tables — translated from legacy xsect.dat
XSectBatch.cpp	Data-oriented batch cross-section geometry — shape-grouped SoA
XSectBatch.hpp	Cross-section geometry — unified batch + per-element API
XSection.cpp	Cross-section geometry — faithful 1:1 port of legacy xsect.c
XSectKernels.hpp	Portable cross-section geometry kernels — one implementation, three consumers (host dynamic wave, host finite volume, device finite volume)
XSectLookup.hpp	Bit-exact geometry-table interpolation — the single source of truth
► hydrology
Climate.cpp	Climate processing — numerically identical to legacy climate.c
Climate.hpp	Climate processing — evaporation, temperature, wind
ClimateFile.cpp	Multi-format climate file reader — faithful to legacy climate.c
ClimateFile.hpp	Multi-format climate file reader for temperature, evaporation, wind
Gage.cpp	Rain gage processing — numerically identical to legacy gage.c
Gage.hpp	Rain gage processing — rainfall interpolation, type conversion
Groundwater.cpp	Two-zone groundwater — matching legacy gwater.c via RKF45 ODE solver
Groundwater.hpp	Two-zone groundwater model — batch-oriented ODE integration
Infiltration.cpp	Infiltration models — numerically identical to legacy infil.c
Infiltration.hpp	Infiltration models — Horton, Green-Ampt, SCS Curve Number
Inflow.cpp	External/DWF inflows — batch SoA, numerically identical to legacy
Inflow.hpp	External inflows, dry weather flows, and RDII at nodes
LID.cpp	LID control modules — batch-oriented, type-grouped
LID.hpp	Low Impact Development (LID) control modules
RDII.cpp	RDII unit hydrograph convolution — matching legacy rdii.c
RDII.hpp	RDII — rainfall-dependent infiltration/inflow via unit hydrograph
RdiiInterface.cpp	RDII interface file — use/save pre-computed RDII inflows
RdiiInterface.hpp	RDII interface file — use/save pre-computed RDII inflows
Runoff.cpp	Subcatchment runoff — 3-subarea nonlinear reservoir model
Runoff.hpp	Subcatchment runoff generation — batch-oriented nonlinear reservoir
RunoffInterface.cpp	Runoff interface file — binary save/load of pre-computed runoff
RunoffInterface.hpp	Runoff interface file — save/load pre-computed runoff results
Snow.cpp	Snowmelt — batch-oriented, vectorisable kernels
Snow.hpp	Snowmelt — degree-day and rain-on-snow methods
► input
► geopackage
► formats
ClimateFormat.cpp	User-CSV climate file — parser + materialiser
ClimateFormat.hpp	User-CSV climate-file parser / materialiser
FormatTypes.hpp	Plain-data types shared by every external-file format parser
HotstartFormat.cpp	Legacy HSF v4 binary hot-start file — parser + materialiser
HotstartFormat.hpp	Legacy HSF v4 binary hot-start file — parser / materialiser
RaingageFormat.cpp	SWMM "Standard" raingage text format — parser + materialiser
RaingageFormat.hpp	SWMM "Standard" raingage text-file parser / materialiser
RoutingInterfaceFormat.cpp	SWMM5 routing-interface text format — parser + materialiser
RoutingInterfaceFormat.hpp	SWMM5 routing interface text format — parser / materialiser
TimeseriesFormat.cpp	SWMM-native timeseries text format — parser + materialiser
TimeseriesFormat.hpp	SWMM-native timeseries text-file parser / materialiser
ExternalContentReader.cpp	Slice IO-8 — Part D content → SimulationContext slot hydration + scratch-file materialisation
ExternalContentReader.hpp	Slice IO-8 — hydrate SimulationContext external-file slots from the Part D GeoPackage tables and materialise scratch files in the legacy on-disk format so legacy fopen sites keep working
ExternalContentWriter.cpp	Slice IO-7 — implementation of the Part D content fan-out
ExternalContentWriter.hpp	Slice IO-7 — fan-out from in-memory external-file slots to the Part D GeoPackage tables
GeoPackageInputPlugin.cpp	IInputPlugin implementation for GeoPackage format
GeoPackageInputPlugin.hpp	IInputPlugin implementation for reading/writing SWMM models from/to GeoPackage
GeoPackageOutputPlugin.cpp	IOutputPlugin that writes per-timestep results to a GeoPackage
GeoPackageOutputPlugin.hpp	IOutputPlugin that writes per-timestep results to a GeoPackage
GeoPackagePluginInfo.cpp	IPluginComponentInfo implementation for the GeoPackage I/O plugin
GeoPackagePluginInfo.hpp	IPluginComponentInfo implementation for the GeoPackage I/O plugin
GeoPackageReader.cpp	Reads a GeoPackage file into a SimulationContext (all SWMM input sections)
GeoPackageReader.hpp	Reads a GeoPackage file into a SimulationContext (model input tables)
GeoPackageReportPlugin.cpp	IReportPlugin that writes summary statistics to a GeoPackage
GeoPackageReportPlugin.hpp	IReportPlugin that writes summary statistics to a GeoPackage
GeoPackageSchema.cpp	DDL implementation for the OpenSWMM GeoPackage schema
GeoPackageSchema.hpp	DDL and metadata registration for the OpenSWMM GeoPackage schema
GeoPackageWriter.cpp	Writes a SimulationContext to GeoPackage (all SWMM input sections)
GeoPackageWriter.hpp	Writes a SimulationContext to a GeoPackage file (model input tables)
GpkgGeometry.hpp	GeoPackage Binary geometry encoding and decoding (ISO WKB with GP header)
GpkgUtils.hpp	RAII wrappers and utilities for SQLite operations in GeoPackage I/O
openswmm_geopackage_impl.cpp	C API implementation for GeoPackage I/O
► handlers
CatchmentHandler.cpp	Section handlers for [SUBCATCHMENTS], [SUBAREAS], and [RAINGAGES]
CatchmentHandler.hpp	Section handlers for subcatchments and rain gages
ControlsHandler.cpp	Section handlers for [CONTROLS] and [REPORT]
ControlsHandler.hpp	Section handlers for [CONTROLS] and [REPORT]
FilesHandler.cpp	[FILES] section handler — secondary file references
FilesHandler.hpp	[FILES] section handler — secondary file references
HydrologyHandler.cpp	Section handlers for [EVAPORATION], [TEMPERATURE], [SNOWPACKS], [AQUIFERS], [GROUNDWATER], [GWF], [LID_CONTROLS], and [LID_USAGE]
HydrologyHandler.hpp	Section handlers for hydrology-related input sections
InflowsHandler.cpp	Section handlers for [PATTERNS], [INFLOWS], [DWF], [RDII], [HYDROGRAPHS], and [RDII_DECAY]
InflowsHandler.hpp	Section handlers for patterns, inflows, DWF, and RDII
InfraHandler.cpp	Section handlers for [STREETS], [INLETS], [INLET_USAGE], [ADJUSTMENTS], [EVENTS]
InfraHandler.hpp	Section handlers for [STREETS], [INLETS], [INLET_USAGE]
LinksHandler.cpp	Section handlers for [CONDUITS], [PUMPS], [ORIFICES], [WEIRS], [OUTLETS], [XSECTIONS], [LOSSES], [TRANSECTS]
LinksHandler.hpp	Section handlers for link types: CONDUITS, PUMPS, ORIFICES, WEIRS, OUTLETS, XSECTIONS, LOSSES, TRANSECTS
NodesHandler.cpp	Section handlers for [JUNCTIONS], [OUTFALLS], [DIVIDERS], [STORAGE], [COORDINATES]
NodesHandler.hpp	Section handlers for node types: JUNCTIONS, OUTFALLS, DIVIDERS, STORAGE
OptionsHandler.cpp	[OPTIONS] section handler for the new engine
OptionsHandler.hpp	[OPTIONS] section handler declaration
PluginsHandler.cpp	[PLUGINS] section handler — parses plugin library specs (Phase 4, R12)
PluginsHandler.hpp	[PLUGINS] section handler (Phase 4, R12)
ProcessComponentsHandler.cpp	[PROCESS_COMPONENTS] section handler — parses component registrations (Unified Transport suite, D-UT8; phase IO1)
ProcessComponentsHandler.hpp	[PROCESS_COMPONENTS] section handler (Unified Transport suite, D-UT8)
QualityHandler.cpp	Section handlers for [POLLUTANTS], [LANDUSES], [COVERAGES], [BUILDUP], [WASHOFF], [TREATMENT], and [LOADINGS]
QualityHandler.hpp	Section handlers for water quality input sections
SpatialHandler.cpp	Section handlers for [MAP], [VERTICES], [POLYGONS], [SYMBOLS]
SpatialHandler.hpp	Section handlers for spatial sections: [MAP], [VERTICES], [POLYGONS]
TablesHandler.cpp	Section handlers for [TIMESERIES] and [CURVES]
TablesHandler.hpp	Section handlers for [TIMESERIES] and [CURVES]
TitleHandler.cpp	[TITLE] section handler implementation
TitleHandler.hpp	[TITLE] section handler
UserFlagsHandler.cpp	[USER_FLAGS] section handler — parses flag schema definitions (R28)
UserFlagsHandler.hpp	[USER_FLAGS] section handler (R28)
UserFlagValuesHandler.cpp	[USER_FLAG_VALUES] section handler — implements R28 per-object values
UserFlagValuesHandler.hpp	[USER_FLAG_VALUES] section handler (R28)
InputParseUtils.hpp	Shared parsing utilities for input section handlers
InputReader.cpp	Implementation of the top-level SWMM .inp file reader
InputReader.hpp	Top-level SWMM .inp file reader
MultiColumnSeriesFile.cpp	Parse-once cache for multi-column series files (CSV/TSV/TSF)
MultiColumnSeriesFile.hpp	Parse-once cache for multi-column external series files (CSV / TSV / PCSWMM TSF)
PostParseResolver.cpp	Post-parse cross-reference resolution
PostParseResolver.hpp	Post-parse cross-reference resolution for the input system
SectionParser.hpp	Utility for splitting raw INP section lines into (data, comment) pairs
SectionRegistry.cpp	Implementation of the section-handler registry
SectionRegistry.hpp	Registry that maps SWMM section tags to handler functions
Tokenizer.cpp	Implementation of the multi-delimiter SWMM input tokenizer
Tokenizer.hpp	Multi-delimiter tokenizer for SWMM input files
► math
FindRoot.cpp	Newton-Raphson + Ridder — numerically identical to legacy findroot.c
FindRoot.hpp	Newton-Raphson and Ridder root finders
MathExpr.cpp	Shunting-yard parser + stack evaluator
MathExpr.hpp	Mathematical expression parser and evaluator
OdeSolver.cpp	RK45 Cash-Karp ODE integrator — numerically identical to legacy
OdeSolver.hpp	Runge-Kutta-Cash-Karp (RK45) ODE integrator with adaptive step control
SIMD.hpp	SIMD abstraction layer for vectorized arithmetic operations
► output
IOThread.cpp	IOThread — producer/consumer output writer implementation
IOThread.hpp	Separate IO writer thread with a bounded task queue (Phase 5, R17)
openswmm_output_impl.cpp	C FFI wrapper for the OutputReader class
OutputReader.cpp	OutputReader — reads SWMM 5.x binary .out files
OutputReader.hpp	Internal C++ class for reading SWMM 5.x binary output files
WriteTask.hpp	Ring-buffer task descriptor for the IO thread (Phase 5, R17)
► plugins
BuiltinPluginInfos.cpp	Singletons + file_filters() implementations for built-in plugins
BuiltinPluginInfos.hpp	IPluginComponentInfo singletons for the engine's built-in default plugins
DefaultInputPlugin.cpp	DefaultInputPlugin — reads/writes SWMM .inp files
DefaultInputPlugin.hpp	DefaultInputPlugin — reads/writes SWMM .inp files
DefaultOutputPlugin.cpp	DefaultOutputPlugin — SWMM 5.x binary .out file writer
DefaultOutputPlugin.hpp	Built-in output plugin that writes the legacy SWMM binary output format
DefaultReportPlugin.cpp	DefaultReportPlugin — legacy SWMM-compatible .rpt report writer
DefaultReportPlugin.hpp	Built-in report plugin that writes the legacy SWMM .rpt summary
DefaultStateIOPlugin.cpp	Built-in state IO plugin implementation
DefaultStateIOPlugin.hpp	Built-in state IO plugin — wraps HotStartManager for read/write
PluginDiscovery.cpp	Public filter-discovery facade — implementation
PluginFactory.cpp	Plugin loader, auto-discovery, and lifecycle manager — implementation
PluginFactory.hpp	Plugin loader, auto-discovery, and lifecycle manager
ProcessComponentRegistry.cpp	Registry + config-file delivery for [PROCESS_COMPONENTS] — IO1–IO2
ProcessComponentRegistry.hpp	Registry + config-file delivery for [PROCESS_COMPONENTS] (Unified Transport suite D-UT8; phases IO1–IO2)
► quality
► lard
LagrangianSolver.hpp	LARD (Lagrangian ARD) quality engine — X2: LTD transport core
RwptDispersion.hpp	X3b: RWPT longitudinal dispersion on LARD segments
SegmentStore.hpp	LARD segment slabs — per-link ring buffers of plug-flow segments
Landuse.cpp	Pollutant buildup/washoff — batch SoA, numerically identical to legacy
Landuse.hpp	Pollutant buildup and washoff per land use — batch SoA
NegativeSources.hpp	D-NS1: one clamp-bookkeeping seam for all three quality engines
QualityRouting.cpp	Water quality routing — batch SoA, numerically identical to legacy
QualityRouting.hpp	Water quality routing — constituent transport, mixing, decay
Treatment.cpp	Treatment expression parser (Shunting-yard) and evaluator (stack machine)
Treatment.hpp	Treatment expression evaluator for water quality
► transport
► components
► EulerianArdComponent
ArdConfig.cpp	Transport.ard component apply hook — phase E3 body (dispersion subset of model.ard)
ArdConfig.hpp	The org.hydrocouple.openswmm.transport.ard process component — phase E3: parse the dispersion subset of model.ard into SimulationContext::ard_config
ArdEngine.cpp	Solver-agnostic Eulerian ARD transport engine — phase E1 body
ArdEngine.hpp	Solver-agnostic Eulerian ARD transport engine (phase E1)
► HeatFluxModules
BedExchange.cpp	Plan H6b — implementation. See BedExchange.hpp for the derivation
BedExchange.hpp	Plan H6b — bed conduction, deep-ground conduction, and hyporheic exchange, integrated SIMULTANEOUSLY with the surface fluxes
HeatFluxes.cpp	Plan D-H5e — the single node/link surface-flux binding
HeatFluxes.hpp	Plan D-H5e — the single node/link surface-flux binding
HeatOverrides.cpp	Plan PE — resolution and lookup. See the header
HeatOverrides.hpp	Plan PE — resolve per-element attributes, and read them
RadiativeExchange.cpp	Phase H3 body — shortwave/longwave radiation
RadiativeExchange.hpp	Phase H3 — shortwave and longwave radiation at the water surface (heat plan §2.2; RHEComponent §6)
SolarRadiation.cpp	Phase H6a — solar position, clear-sky irradiance, cloud
SolarRadiation.hpp	Phase H6a — where incoming shortwave Jin comes from (heat plan §2.5, D-H6a)
SurfaceExchange.cpp	Phase H2 body — latent/sensible surface exchange
SurfaceExchange.hpp	Phase H2 — latent and sensible heat exchange at the water surface (heat plan §2.1; CSHComponent §4.4–4.5)
► HeatModule
HeatComponent.cpp	Heat component apply hook — phase H1 body
HeatComponent.hpp	The org.hydrocouple.openswmm.heat process component — phase H1: parse [HEAT_SOURCES] (model.heat) into SimulationContext::heat_config
HeatLegacy.cpp	Phase H1 body — LEGACY CSTR temperature transport
HeatLegacy.hpp	Phase H1 — the LEGACY (CSTR) engine's temperature transport
HeatLid.cpp	Phase H5b body — temperature through the LID layer stack
HeatLid.hpp	Phase H5b — temperature through the LID layer stack
HeatWatershed.cpp	Phase H5a — temperature on subcatchment surfaces
HeatWatershed.hpp	Phase H5a — temperature on subcatchment surfaces
► ReactionModule
MsxLegacyTransport.cpp	R4b body. Formula provenance is routeLegacyHeat — see the header
MsxLegacyTransport.hpp	Phase R4b (transport half) — MSX species advect under LEGACY
ReactionArdBinding.cpp	Phase E4/R6 body — Eulerian ARD engine reaction stage
ReactionArdBinding.hpp	Phase E4/R6 — reaction binding for the Eulerian ARD engine
ReactionExpression.cpp	Reaction expression compiler + Tier-1 evaluator — phase R2 body
ReactionExpression.hpp	Reaction expression compiler + Tier-1 evaluator (phase R2)
ReactionIntegrator.cpp	Reaction kinetics integration — phase R3 body
ReactionIntegrator.hpp	Reaction kinetics integration over one reaction step (phase R3): EUL / RK5 (Cash–Karp) / ROS2 / BDF2 for RATE species, joint damped-Newton for EQUIL species, in-order FORMULA evaluation, rate-unit scaling
ReactionLegacyBinding.cpp	Phase R4 body — LEGACY quality engine reaction binding
ReactionLegacyBinding.hpp	Phase R4 — reaction binding for the LEGACY (CSTR) quality engine
ReactionsComponent.cpp	Reactions process component — phase R1 body
ReactionsComponent.hpp	The org.hydrocouple.openswmm.reactions process component — phase R1: parse model.rxn [REACTION_*] sections into ReactionData + the species registry
ReactionsWriter.cpp	Canonical .rxn serializer (E-C3)
ReactionsWriter.hpp	Canonical .rxn text from engine state (E-C3)
► WaterAgeModule
WaterAgeComponent.cpp	Waterage component apply hook — phase A1a body
WaterAgeComponent.hpp	The org.hydrocouple.openswmm.waterage process component — phase A1a: parse [WATER_AGE_SOURCES] (model.age) into SimulationContext::water_age_config
WaterAgeLegacy.cpp	Phase A1b body — LEGACY CSTR water-age mirror
WaterAgeLegacy.hpp	Phase A1b — the LEGACY (CSTR) engine's water-age mirror
WaterAgeLid.cpp	Phase A4 body — water age through the LID layer stack
WaterAgeLid.hpp	Phase A4 — water age through the LID layer stack
WaterAgeWatershed.cpp	Phase A3 body — subcatchment surface water age
WaterAgeWatershed.hpp	Phase A3 — water age on subcatchment surfaces
LidLayerCommon.cpp	LID layer topology and geometry, shared by every species track
LidLayerCommon.hpp	LID layer topology and geometry, shared by every species track
WatershedCommon.cpp	The arriving-water rate at a subarea (S1 — snow mixing volume)
WatershedCommon.hpp	The arriving-water rate at a subarea — shared by every species track on the watershed surface
► fvkernels
SpeciesTransportKernels.cpp	Shared 1D FV species transport kernels — bodies moved VERBATIM from hydraulics/fv/ExplicitFvSolver.cpp (phase E0; see the header)
SpeciesTransportKernels.hpp	Shared 1D FV species transport kernels (advection reconstruction, Zalesak FCT flux limiting, implicit per-chain dispersion)
InitialQualitySeeds.hpp	[INITIAL_QUALITY] reserved-species (WATER_AGE/__TEMPERATURE__) helpers for the per-engine seed sites (E-A3)
MsxInitialQuality.cpp	U2 — [INITIAL_QUALITY] MSX rows mirrored into ReactionData (see header)
MsxInitialQuality.hpp	U2 (2026-09-07) — [INITIAL_QUALITY] rows for MSX species
TransportPolicy.cpp	Domain × Species-class transport contract (see the header)
TransportPolicy.hpp	The Domain × Species-class transport contract (OPT plan §5, E2)
▼ legacy
► engine
climate.c	Climate related functions
consts.h	Header file for SWMM constants
controls.c	Rule-based controls functions
culvert.c
datetime.c
datetime.h	Header file for date and time functions
dwflow.c
dynwave.c
enums.h	Header file for enumerated constants
error.c	Error messages
error.h	Header file for error codes
exfil.c
exfil.h	Exfiltration object header file
findroot.c
findroot.h	Header file for root finding method
flowrout.c
forcmain.c
funcs.h	Header file for global interfacing functions
gage.c
globals.h
gwater.c
hash.c
hash.h
headers.h
hotstart.c
iface.c
infil.c
infil.h
inflow.c
inlet.c
inlet.h
input.c
inputrpt.c
keywords.c
keywords.h
kinwave.c
landuse.c
lid.c
lid.h
lidproc.c
link.c
macros.h
massbal.c
mathexpr.c
mathexpr.h
mempool.c
mempool.h
node.c
objects.h	Definitions of data structures
odesolve.c
odesolve.h
output.c
project.c
qualrout.c
rain.c
rdii.c
report.c
roadway.c
routing.c
runoff.c
shape.c
snow.c
stats.c
statsrpt.c
street.c
street.h
subcatch.c
surfqual.c	Subcatchment water quality functions
table.c
text.h
toposort.c
transect.c
treatmnt.c
xsect.c
► output
errormanager.c	Source file providing a simple interface for managing SWMM output API runtime error messages
errormanager.h	Header file for SWMM output API error handling