Classes
class	Capacitor
class	Component
	Base class for every circuit component. More...
class	CurrentSource
class	Diode
class	ElectricalCircuit
	The circuit itself: MNA assembly, Jacobian, solve and timestep. More...
class	ElectricalCircuitFactory
	Builds the circuit from the input deck's circuit{} section. More...
class	ElectricNode
	Circuit node; the unknowns of the modified nodal analysis. More...
class	FEMTwoTerminals
	Terminal pair coupling the circuit to the finite-element problem. More...
class	Inductor
struct	NetlistControl
	one supported control card ( only ".tran" today; ".end" sets a flag instead of a record ) More...
struct	NetlistDirective
	one "* belfem:" extension directive ( plan §5, Option A ): superconductor, timed switch, per-instance BDF order More...
struct	NetlistElement
	one element card ( R/C/L/V/I/D ), lexed but not interpreted: all payloads stay strings; numeric conversion and semantic validation are the netlist factory's job More...
struct	NetlistModel
	one .model card ( ".model dmod d( is=1e-14 )" ) More...
class	NetlistParser
	Lexes an ngspice netlist into the intermediate representation the NgspiceCircuitFactory consumes ( todo/ngspice_parser_plan.md §9.1 ). More...
class	NgspiceCircuitFactory
	Builds an ElectricalCircuit from a lexed netlist ( todo/ngspice_parser_plan.md §9.2, decisions O5/O6/O8/O9 ). More...
class	Resistor
class	Superconductor
class	Switch
class	TwoTerminals
class	VoltageSource

Enumerations
enum class	ComponentType { RESISTOR = 0 , CAPACITOR = 1 , INDUCTOR = 2 , VOLTAGESOURCE = 3 , CURRENTSOURCE = 4 , SWITCH = 5 , DIODE = 6 , SUPERCONDUCTOR = 7 , TERMINALPAIR = 8 , UNDEFINED = 9 }

Functions
std::string	to_string (const ComponentType aComponentType)
ComponentType	component_type (const string &aString)
void	save_shift_register (hid_t &aGroup, const string &aLabel, const ShiftRegister< real > &aRegister)
	write one time-stepping history register into the restart group, as aLabel ( samples, newest first ) and aLabel_cap ( capacity )
void	load_shift_register (hid_t &aGroup, const string &aLabel, ShiftRegister< real > &aRegister)
	restore one history register saved by save_shift_register().
real	spice_number_to_si (const string &aToken)
	Convert one SPICE number token into its SI value.

Enumeration Type Documentation

◆ ComponentType

enum class belfem::electronics::ComponentType

strong

Enumerator
RESISTOR
CAPACITOR
INDUCTOR
VOLTAGESOURCE
CURRENTSOURCE
SWITCH
DIODE
SUPERCONDUCTOR
TERMINALPAIR
UNDEFINED

Function Documentation

◆ component_type()

ComponentType belfem::electronics::component_type ( const string & aString )

◆ load_shift_register()

void belfem::electronics::load_shift_register	(	hid_t &	aGroup,
		const string &	aLabel,
		ShiftRegister< real > &	aRegister )

inline

restore one history register saved by save_shift_register().

The rebuild is clear() + oldest-first push(): the visible window is identical to the dumped one. The revert flag after a FULL rebuild is CanRevert rather than the live CanRevertFull ( the backup slot is not refilled ) — calling shift_back() before the first post-restore shift() is therefore FORBIDDEN; every production reject path shifts first.

◆ save_shift_register()

void belfem::electronics::save_shift_register	(	hid_t &	aGroup,
		const string &	aLabel,
		const ShiftRegister< real > &	aRegister )

inline

write one time-stepping history register into the restart group, as aLabel ( samples, newest first ) and aLabel_cap ( capacity )

◆ spice_number_to_si()

real belfem::electronics::spice_number_to_si ( const string & aToken )

Convert one SPICE number token into its SI value.

Implements the ngspice number grammar (ngspice manual, "Ngspice scale factors" table and the "Letters following a number" rule): an integer (12, -44), a floating point number (3.14159), either followed by an integer exponent (1e-14, 2.65e3), optionally followed by a case-insensitive scale factor

T = 1e12 G = 1e9 Meg = 1e6 K = 1e3 mil = 25.4e-6 m = 1e-3 u = 1e-6 n = 1e-9 p = 1e-12 f = 1e-15 a = 1e-18

with longest match first (Meg and mil win over m). Letters immediately after the number or the scale factor are ignored, so 10, 10V, 10Volts and 10Hz are the same number and 1k, 1kOhm and 1kHz the same value. SPICE values are dimensionless SI: F is the femto scale factor, never Farad – a 100 F capacitor is written "100", while "100F" is 100 fF. The same trap exists for currents: A is the atto scale factor, never Ampere – a 1 A source is written "1", while "1A" is 1e-18.

Errors (BELFEM_ERROR): empty token, no leading number ("abc", "inf", "0x10"), a magnitude outside [DBL_MIN, DBL_MAX] other than exact zero, before or after the scale factor is applied ("1e999", "1e-999", "1e300T", and subnormals like "1e-320"), or any non-letter character after the number/scale factor – including the old-style embedded suffix "2k5" (write "2.5k") and embedded whitespace. Conversion is locale-independent (std::from_chars).

Parameters

aToken one whitespace-free token from a netlist card

Returns: the value in SI units

◆ to_string()

string belfem::electronics::to_string ( const ComponentType aComponentType )

Classes

Enumerations

Functions