OpenSWMM Engine — Tables (Time Series & Curves) and Patterns C API. More...

#include "openswmm_engine.h"

Include dependency graph for openswmm_tables.h:

This graph shows which files directly or indirectly include this file:

Functions
SWMM_ENGINE_API int	swmm_table_count (SWMM_Engine engine)
	Get the total number of tables (time series + curves) in the model.

SWMM_ENGINE_API int	swmm_table_index (SWMM_Engine engine, const char *id)
	Look up a table's zero-based index by its string identifier.

SWMM_ENGINE_API const char *	swmm_table_id (SWMM_Engine engine, int idx)
	Get the string identifier of a table by index.

SWMM_ENGINE_API int	swmm_timeseries_add (SWMM_Engine engine, const char *id)
	Add a new time series to the model.

SWMM_ENGINE_API int	swmm_curve_add (SWMM_Engine engine, const char *id, int type)
	Add a new curve to the model.

SWMM_ENGINE_API int	swmm_table_add_point (SWMM_Engine engine, int idx, double x, double y)
	Append a data point (x, y) to a table.

SWMM_ENGINE_API int	swmm_table_get_point_count (SWMM_Engine engine, int idx, int *count)
	Get the number of data points in a table.

SWMM_ENGINE_API int	swmm_table_get_point (SWMM_Engine engine, int idx, int pt_idx, double x, double y)
	Get a specific data point from a table.

SWMM_ENGINE_API int	swmm_table_clear (SWMM_Engine engine, int idx)
	Remove all data points from a table.

SWMM_ENGINE_API int	swmm_table_lookup (SWMM_Engine engine, int idx, double x, double *y)
	Interpolate a Y value from a table for a given X.

SWMM_ENGINE_API int	swmm_pattern_add (SWMM_Engine engine, const char *id, int type)
	Add a new time pattern to the model.

SWMM_ENGINE_API int	swmm_pattern_set_factors (SWMM_Engine engine, int idx, const double *factors, int count)
	Set the multiplier factors for a time pattern.

SWMM_ENGINE_API int	swmm_pattern_count (SWMM_Engine engine)
	Get the total number of time patterns in the model.

Detailed Description

OpenSWMM Engine — Tables (Time Series & Curves) and Patterns C API.

Table identity, creation, data point management, cursor-optimized lookup, and time pattern management.

See also: openswmm_engine.h

Author: Caleb Buahin caleb.nosp@m..bua.nosp@m.hin@g.nosp@m.mail.nosp@m..com

Copyright: Copyright (c) 2026 HydroCouple. All rights reserved.

License\n MIT License

Function Documentation

◆ swmm_curve_add()

SWMM_ENGINE_API int swmm_curve_add	(	SWMM_Engine	engine,
		const char *	id,
		int	type
	)

Add a new curve to the model.

Curve types: 0=STORAGE, 1=DIVERSION, 2=TIDAL, 3=RATING, 4=CONTROL, 5=SHAPE, 6=PUMP1..PUMP4, etc.

Parameters

engine	Engine handle (SWMM_STATE_BUILDING).
id	Unique null-terminated identifier.
type	Curve type code.

Returns: SWMM_OK on success, or an error code.

◆ swmm_pattern_add()

SWMM_ENGINE_API int swmm_pattern_add	(	SWMM_Engine	engine,
		const char *	id,
		int	type
	)

Add a new time pattern to the model.

Pattern types: 0=MONTHLY, 1=DAILY, 2=HOURLY, 3=WEEKEND.

Parameters

engine	Engine handle (SWMM_STATE_BUILDING).
id	Unique null-terminated identifier.
type	Pattern type code.

Returns: SWMM_OK on success, or an error code.

◆ swmm_pattern_count()

SWMM_ENGINE_API int swmm_pattern_count ( SWMM_Engine engine )

Get the total number of time patterns in the model.

Parameters

engine Engine handle.

Returns: Number of patterns, or -1 on error.

◆ swmm_pattern_set_factors()

SWMM_ENGINE_API int swmm_pattern_set_factors	(	SWMM_Engine	engine,
		int	idx,
		const double *	factors,
		int	count
	)

Set the multiplier factors for a time pattern.

Parameters

engine	Engine handle.
idx	Zero-based pattern index.
factors	Array of multiplier values.
count	Number of factors (e.g., 12 for MONTHLY, 24 for HOURLY).

Returns: SWMM_OK on success, or an error code.

◆ swmm_table_add_point()

SWMM_ENGINE_API int swmm_table_add_point	(	SWMM_Engine	engine,
		int	idx,
		double	x,
		double	y
	)

Append a data point (x, y) to a table.

For time series, x is in decimal days; for curves, x depends on the curve type (e.g., depth for storage curves).

Parameters

engine	Engine handle.
idx	Zero-based table index.
x	X value (independent variable).
y	Y value (dependent variable).

Returns: SWMM_OK on success, or an error code.

◆ swmm_table_clear()

SWMM_ENGINE_API int swmm_table_clear	(	SWMM_Engine	engine,
		int	idx
	)

Remove all data points from a table.

Parameters

engine	Engine handle.
idx	Zero-based table index.

Returns: SWMM_OK on success, or an error code.

◆ swmm_table_count()

SWMM_ENGINE_API int swmm_table_count ( SWMM_Engine engine )

Get the total number of tables (time series + curves) in the model.

Parameters

engine Engine handle.

Returns: Number of tables, or -1 on error.

◆ swmm_table_get_point()

SWMM_ENGINE_API int swmm_table_get_point	(	SWMM_Engine	engine,
		int	idx,
		int	pt_idx,
		double *	x,
		double *	y
	)

Get a specific data point from a table.

Parameters

	engine	Engine handle.
	idx	Zero-based table index.
	pt_idx	Zero-based point index within the table.
[out]	x	Receives the X value.
[out]	y	Receives the Y value.

Returns: SWMM_OK on success, or an error code.

◆ swmm_table_get_point_count()

SWMM_ENGINE_API int swmm_table_get_point_count	(	SWMM_Engine	engine,
		int	idx,
		int *	count
	)

Get the number of data points in a table.

Parameters

	engine	Engine handle.
	idx	Zero-based table index.
[out]	count	Receives the point count.

Returns: SWMM_OK on success, or an error code.

◆ swmm_table_id()

SWMM_ENGINE_API const char * swmm_table_id	(	SWMM_Engine	engine,
		int	idx
	)

Get the string identifier of a table by index.

Parameters

engine	Engine handle.
idx	Zero-based table index.

Returns: Null-terminated string owned by the engine, or NULL on error.

◆ swmm_table_index()

SWMM_ENGINE_API int swmm_table_index	(	SWMM_Engine	engine,
		const char *	id
	)

Look up a table's zero-based index by its string identifier.

Parameters

engine	Engine handle.
id	Null-terminated table identifier.

Returns: Zero-based index, or -1 if not found.

◆ swmm_table_lookup()

SWMM_ENGINE_API int swmm_table_lookup	(	SWMM_Engine	engine,
		int	idx,
		double	x,
		double *	y
	)

Interpolate a Y value from a table for a given X.

Uses cursor-based lookup for efficient sequential access (e.g., during time-stepping through a time series).

Parameters

	engine	Engine handle.
	idx	Zero-based table index.
	x	X value to look up.
[out]	y	Receives the interpolated Y value.

Returns: SWMM_OK on success, or an error code.

Here is the call graph for this function:

◆ swmm_timeseries_add()

SWMM_ENGINE_API int swmm_timeseries_add	(	SWMM_Engine	engine,
		const char *	id
	)

Add a new time series to the model.

Parameters

engine	Engine handle (SWMM_STATE_BUILDING).
id	Unique null-terminated identifier.

Returns: SWMM_OK on success, or an error code.

Functions

Detailed Description

Function Documentation

◆ swmm_curve_add()

◆ swmm_pattern_add()

◆ swmm_pattern_count()

◆ swmm_pattern_set_factors()

◆ swmm_table_add_point()

◆ swmm_table_clear()

◆ swmm_table_count()

◆ swmm_table_get_point()

◆ swmm_table_get_point_count()

◆ swmm_table_id()

◆ swmm_table_index()

◆ swmm_table_lookup()

◆ swmm_timeseries_add()