Contents

Preface

What's New

Related Documents

Typographic and Syntax Conventions

1

Introduction

Overview

LEF Reader Working Modes

Comparison Utility

Compressed LEF Files

Orientation Codes

2

LEF Reader Setup and Control Routines

Calling the API Routines

LEF API Routines

lefrInit

lefrInitSession

lefrClear

lefrGetUserData

lefrPrintUnusedCallbacks

lefrRead

lefrRegisterLef58Type

lefrReset

lefrSetCommentChar

lefrSetRegisterUnusedCallbacks

lefrSetShiftCase

lefrSetUserData

lefrSetVersionValue

Examples

3

LEF Reader Callback Routines

Callback Function Format

Callback Type

LEF_Data

User Data

Callback Types and Setting Routines

Examples

User Callback Routines

lefrDensityCbkFnType

lefrDoubleCbkFnType

lefrIntergerCbkFnType

lefrLayerCbkFnType

lefrMacroCbkFnType

lefrMacroForeignCbkFnType

lefrMacroNumCbkFnType

lefrMacroSiteCbkFnType

lefrMaxStackViaCbkFnType

lefrNonDefaultCbkFnType

lefrObstructionCbkFnType

lefrPinCbkFnType

lefrPropCbkFnType

lefrSiteCbkFnType

lefrSpacingCbkFnType

lefrStringCbkFnType

lefrUnitsCbkFnType

lefrUseMinSpacingCbkFnType

lefrViaCbkFnType

lefrViaRuleCbkFnType

lefrVoidCbkFnType

Examples

4

LEF Reader Classes

Introduction

Callback Style Interface

Retrieving Repeating LEF Data

Deriving C Syntax from C++ Syntax

C++ Syntax

C Syntax

LEF Reader Classes

Layer Classes

lefiAntennaModel

lefiAntennaPWL

lefiInfluence

lefiLayer

lefiLayerDensity

lefiOrthogonal

lefiParallel

lefiSpacingTable

lefiTwoWidths

Macro Data Classes

lefiDensity

lefiMacro

lefiMacroForeign

lefiMacroSite

lefiPoints

Macro Examples

Macro Obstruction Class

lefiObstruction

Macro Obstruction Examples

Macro Pin Classes

lefiPin

lefiPinAntennaModel

lefiGeometries

lefiGeomEnum

lefiGeomRect

lefiGeomRectIter

lefiGeomPath

lefiGeomPathIter

lefiGeomPolygon

lefiGeomPolygonIter

lefiGeomVia

lefiGeomViaIter

Macro Pin Examples

Maximum Via Stack Class

lefiMaxStackVia

Miscellaneous Class

lefiUserData

Nondefault Rule Class

lefiNonDefault

Nondefault Rule Examples

Property Definition Classes

lefiProp

lefiPropType

Property Definition Examples

Same-Net Spacing Class

lefiSpacing

Same-Net Spacing Examples

Site Classes

lefiSite

lefiSitePattern

Site Examples

Units Class

lefiUnits

Units Examples

Use Min Spacing Class

lefiUseMinSpacing

Via Classes

lefiVia

lefiViaLayer

Via Examples

Via Rule Classes

lefiViaRule

lefiViaRuleLayer

Via Rule Examples

5

LEF Writer Callback Routines

Callback Function Format

Callback Type

User Data

Callback Types and Setting Routines

6

LEF Writer Routines

LEF Writer Setup and Control

lefwInit

lefwEnd

lefwCurrentLineNumber

lefwNewLine

lefwPrintError

Setup Examples

Bus Bit Characters

lefwBusBitChars

Bus Bit Characters Example

Clearance Measure

lefwClearanceMeasure

Divider Character

lefwDividerChar

Divider Character Examples

Extensions

lefwStartBeginext

lefwEndBeginext

lefwBeginextCreator

lefwBeginextDate

lefwBeginextRevision

lefwBeginextSyntax

Extensions Examples

Layer (Cut, Masterslice, Overlap, Implant)

Defining Masterslice and Overlap Layers

Defining Cut Layers

Defining Implant Layers

lefwStartLayer

lefwEndLayer

lefwLayerACCurrentDensity

lefwLayerACCutarea

lefwLayerACFrequency

lefwLayerACTableEntries

lefwLayerAntennaAreaFactor

lefwLayerAntennaAreaRatio

lefwLayerAntennaCumAreaRatio

lefwLayerAntennaCumDiffAreaRatio

lefwLayerAntennaCumDiffAreaRatioPwl

lefwLayerAntennaDiffAreaRatio

lefwLayerAntennaDiffAreaRatioPwl

lefwLayerAntennaModel

lefwLayerArraySpacing

lefwLayerCutSpacing

lefwLayerCutSpacingAdjacent

lefwLayerCutSpacingArea

lefwLayerCutSpacingCenterToCenter

lefwLayerCutSpacingEnd

lefwLayerCutSpacingLayer

lefwLayerCutSpacingParallel

lefwLayerCutSpacingSamenet

lefwLayerCutSpacingTableOrtho

lefwLayerDCCurrentDensity

lefwLayerDCCutarea

lefwLayerDCTableEntries

lefwLayerEnclosure

lefwLayerEnclosureLength

lefwLayerEnclosureWidth

lefwLayerPreferEnclosure

lefwLayerResistancePerCut

lefwLayerWidth

Layer Examples

Layer (Routing)

lefwStartLayerRouting

lefwEndLayerRouting

lefwDensityCheckStep

lefwDensityCheckWindow

lefwFillActiveSpacing

lefwLayerACCurrentDensity

lefwLayerACFrequency

lefwLayerACTableEntries

lefwLayerACWidth

lefwLayerAntennaAreaDiffReducePwl

lefwLayerAntennaAreaFactor

lefwLayerAntennaAreaMinusDiff

lefwLayerAntennaAreaRatio

lefwLayerAntennaCumAreaRatio

lefwLayerAntennaCumDiffAreaRatio

lefwLayerAntennaCumDiffAreaRatioPwl

lefwLayerAntennaCumDiffSideAreaRatio

lefwLayerAntennaCumDiffSideAreaRatioPwl

lefwLayerAntennaCumSideAreaRatio

lefwLayerAntennaCumRoutingPlusCut

lefwLayerAntennaDiffAreaRatio

lefwLayerAntennaDiffAreaRatioPwl

lefwLayerAntennaDiffSideAreaRatio

lefwLayerAntennaDiffSideAreaRatioPwl

lefwLayerAntennaGatePlusDiff

lefwLayerAntennaModel

lefwLayerAntennaSideAreaFactor

lefwLayerAntennaSideAreaRatio

lefwLayerDCCurrentDensity

lefwLayerDCTableEntries

lefwLayerDCWidth

lefwLayerRouting

lefwLayerRoutingArea

lefwLayerRoutingCapacitance

lefwLayerRoutingCapMultiplier

lefwLayerRoutingDiagMinEdgeLength

lefwLayerRoutingDiagPitch

lefwLayerRoutingDiagPitchXYDistance

lefwLayerRoutingDiagSpacing

lefwLayerRoutingDiagWidth

lefwLayerRoutingEdgeCap

lefwLayerRoutingHeight

lefwLayerRoutingMaxwidth

lefwLayerRoutingMinenclosedarea

lefwLayerRoutingMinimumcut

lefwLayerRoutingMinimumcutConnections

lefwLayerRoutingMinimumcutLengthWithin

lefwLayerRoutingMinimumcutWithin

lefwLayerRoutingMinsize

lefwLayerRoutingMinstep

lefwLayerRoutingMinstepMaxEdges

lefwLayerRoutingMinstepWithOptions

lefwLayerRoutingMinwidth

lefwLayerRoutingOffset

lefwLayerRoutingOffsetXYDistance

lefwLayerRoutingPitch

lefwLayerRoutingPitchXYDistance

lefwLayerRoutingProtrusion

lefwLayerRoutingResistance

lefwLayerRoutingShrinkage

lefwLayerRoutingSpacing

lefwLayerRoutingSpacingEndOfLine

lefwLayerRoutingSpacingEOLParallel

lefwLayerRoutingSpacingEndOfNotchWidth

lefwLayerRoutingSpacingLengthThreshold

lefwLayerRoutingSpacingNotchLength

lefwLayerRoutingSpacingRange

lefwLayerRoutingSpacingRangeInfluence

lefwLayerRoutingSpacingRangeRange

lefwLayerRoutingSpacingRangeUseLengthThreshold

lefwLayerRoutingSpacingSameNet

lefwLayerRoutingStartSpacingtableInfluence

lefwLayerRoutingStartSpacingInfluenceWidth

lefwLayerRoutingStartSpacingtableParallel

lefwLayerRoutingStartSpacingtableParallelWidth

lefwLayerRoutingStartSpacingtableTwoWidths

lefwLayerRoutingStartSpacingtableTwoWidthsWidth

lefwLayerRoutingEndSpacingtable

lefwLayerRoutingThickness

lefwLayerRoutingWireExtension

lefwMaxAdjacentSlotSpacing

lefwMaxCoaxialSlotSpacing

lefwMaxEdgeSlotSpacing

lefwMaximumDensity

lefwMinimumDensity

lefwSlotLength

lefwSlotWidth

lefwSlotWireLength

lefwSlotWireWidth

lefwSplitWireWidth

Routing Layer Examples

Macro

lefwStartMacro

lefwEndMacro

lefwMacroClass

lefwMacroEEQ

lefwMacroForeign

lefwMacroForeignStr

lefwMacroOrigin

lefwMacroSite

lefwMacroSitePattern

lefwMacroSitePatternStr

lefwMacroSize

lefwMacroSymmetry

lefwStartMacroDensity

lefwMacroDensityLayerRect

lefwEndMacroDensity

Macro Examples

Macro Obstruction

lefwStartMacroObs

lefwEndMacroObs

lefwMacroObsDesignRuleWidth

lefwMacroObsLayer

lefwMacroObsLayerPath

lefwMacroObsLayerPolygon

lefwMacroObsLayerRect

lefwMacroObsLayerWidth

lefwMacroObsVia

Macro Obstruction Examples

Macro Pin

lefwStartMacroPin

lefwEndMacroPin

lefwMacroPinAntennaDiffArea

lefwMacroPinAntennaGateArea

lefwMacroPinAntennaMaxAreaCar

lefwMacroPinAntennaMaxCutCar

lefwMacroPinAntennaMaxSideAreaCar

lefwMacroPinAntennaModel

lefwMacroPinAntennaPartialCutArea

lefwMacroPinAntennaPartialMetalArea

lefwMacroPinAntennaPartialMetalSideArea

lefwMacroPinDirection

lefwMacroPinGroundSensitivity

lefwMacroPinMustjoin

lefwMacroPinNetExpr

lefwMacroPinShape

lefwMacroPinSupplySensitivity

lefwMacroPinTaperRule

lefwMacroPinUse

Macro Pin Examples

Macro Pin Port

lefwStartMacroPinPort

lefwEndMacroPinPort

lefwMacroPinPortDesignRuleWidth

lefwMacroPinPortLayer

lefwMacroPinPortLayerPath

lefwMacroPinPortLayerPolygon

lefwMacroPinPortLayerRect

lefwMacroPinPortLayerWidth

lefwMacroPinPortVia

Macro Pin Port Examples

Manufacturing Grid

lefwManufacturingGrid

Maximum Via Stack

lefwMaxviastack

Nondefault Rule

lefwStartNonDefaultRule

lefwEndNonDefaultRule

lefwNonDefaultRuleHardspacing

lefwNonDefaultRuleLayer

lefwNonDefaultRuleMinCuts

lefwNonDefaultRuleStartVia

lefwNonDefaultRuleEndVia

lefwNonDefaultRuleUseVia

lefwNonDefaultRuleUseViaRule

Nondefault Rules Example

Property

lefwIntProperty

lefwRealProperty

lefwStringProperty

Property Example

Property Definitions

lefwStartPropDef

lefwEndPropDef

lefwIntPropDef

lefwRealPropDef

lefwStringPropDef

Property Definitions Examples

Same-Net Spacing

lefwStartSpacing

lefwEndSpacing

lefwSpacing

Same-Net Spacing Examples

Site

lefwSite

lefwEndSite

lefwSiteRowPattern

lefwSiteRowPatternStr

Site Examples

Units

lefwStartUnits

lefwEndUnits

lefwUnits

lefwUnitsFrequency

Units Examples

Use Min Spacing

lefwUseMinSpacing

Version

lefwVersion

Version Examples

Via

lefwStartVia

lefwEndVia

lefwViaLayer

lefwViaLayerPolygon

lefwViaLayerRect

lefwViaResistance

lefwViaViarule

lefwViaViaruleOffset

lefwViaViaruleOrigin

lefwViaViarulePattern

lefwViaViaruleRowCol

Via Examples

Via Rule

lefwStartViaRule

lefwEndViaRule

lefwViaRuleLayer

lefwViaRuleVia

Via Rule Examples

Via Rule Generate

lefwStartViaRuleGen

lefwEndViaRuleGen

lefwViaRuleGenDefault

lefwViaRuleGenLayer

lefwViaRuleGenLayer3

lefwViaRuleGenLayerEnclosure

Via Rule Generate Examples

7

LEF Compressed File Routines

lefGZipOpen

lefGZipClose

Example

8

LEF File Comparison Utility

lefdefdiff

Example

A

LEF Reader and Writer Examples

LEF Reader Program

LEF Writer Program