tiny

Documentation

Index

• Constants
• Variables
• func Abort(s string)
• func Add()
• func AddEntry(n string, t rune)
• func Alloc(n string)
• func Assignment()
• func Block()
• func BoolExpression()
• func BoolOr()
• func BoolTerm()
• func BoolXor()
• func Branch(l string)
• func BranchFalse(l string)
• func Clear()
• func Decl()
• func Divide()
• func DoIf()
• func DoRead()
• func DoWhile()
• func DoWrite()
• func Emit(s string)
• func EmitLn(s string)
• func Epilog()
• func Equals()
• func Error(s string)
• func Expected(s string)
• func Expression()
• func Factor()
• func FirstFactor()
• func FirstTerm()
• func GetChar()
• func GetName()
• func GetNum() (val int)
• func Go()
• func Greater()
• func Header()
• func InTable(n string) bool
• func Init()
• func IsAddOp(r rune) bool
• func IsAlNum(r rune) bool
• func IsAlpha(r rune) bool
• func IsDigit(r rune) bool
• func IsMulOp(r rune) bool
• func IsOrOp(r rune) bool
• func IsRelOp(r rune) bool
• func IsWhite(r rune) bool
• func Less()
• func LessOrEqual()
• func LoadConst(n int)
• func LoadVar(name string)
• func Locate(n string) int
• func Lookup(table []string, s string, n int) int
• func Main()
• func Match(x rune)
• func MatchString(x string)
• func Multiply()
• func NegFactor()
• func Negate()
• func NewLabel() (out string)
• func NewLine()
• func NotEqual()
• func NotFactor()
• func NotIt()
• func PopAdd()
• func PopAnd()
• func PopCompare()
• func PopDiv()
• func PopMul()
• func PopOr()
• func PopSub()
• func PopXor()
• func PostLabel(l string)
• func Prog()
• func Prolog()
• func Push()
• func ReadVar()
• func Relation()
• func Scan()
• func SetEqual()
• func SetGreater()
• func SetGreaterOrEqual()
• func SetLess()
• func SetLessOrEqual()
• func SetNEqual()
• func SkipWhite()
• func Store(name string)
• func Subtract()
• func Term()
• func Term1()
• func TopDecls()
• func Undefined(n string)
• func WriteVar()

Constants

const KWCode string = "xileweRWvbep"

KWCode is the Keyword Code

const MaxEntry = 100

MaxEntry is the number of Entries allowed in the Symbol Table

const NKW = 11

NKW is the Number of Keywords

const NKW1 = 12

NKW1 is the Number of Keywords + 1 (?)

Variables

var KWList = []string{"IF", "ELSE", "ENDIF", "WHILE", "ENDWHILE", "READ",
	"WRITE", "VAR", "BEGIN", "END", "PROGRAM"}

KWList is the Keyword List

var LCount int

LCount is a Label Counter

var Look rune

Look is a Lookahead character

var NEntry int

NEntry is the Next Entry in the Symbol Table

var ST []string

ST is the Symbol Table

var SType []rune

SType is the Symbol Type Table

var Token rune

Token is an Encoded Token

var Value string

Value is an Unencoded Token

Functions

func Abort

func Abort(s string)

Abort Reports Error and Halts

func Add

func Add()

Add Recognizes and Translates an Add

func AddEntry

func AddEntry(n string, t rune)

AddEntry Adds a New Entry to Symbol Table

func Alloc

func Alloc(n string)

Alloc Allocates Storage for a Variable

func Assignment

func Assignment()

Assignment Parses and Translates an Assignment Statement

func Block

func Block()

Block Parses and Translates a Block of Statements

func BoolExpression

func BoolExpression()

BoolExpression Parses and Translates a Boolean Expression

func BoolOr

func BoolOr()

BoolOr Recognizes and Translates a Boolean OR

func BoolTerm

func BoolTerm()

BoolTerm Parses and Translates a Boolean Term

func BoolXor

func BoolXor()

BoolXor Recognizes and Translates an Exclusive OR

func Branch

func Branch(l string)

Branch Branches Unconditional

func BranchFalse

func BranchFalse(l string)

BranchFalse Branches false

func Clear

func Clear()

Clear Clears the Primary Register

func Decl

func Decl()

Decl Processes a Data Declaration

func Divide

func Divide()

Divide Recognizes and Translates a Divide

func DoIf

func DoIf()

DoIf Recognizes and Translates an IF Construct

func DoRead

func DoRead()

DoRead Processes a Read Statement

func DoWhile

func DoWhile()

DoWhile Parses and Translates a WHILE Statement

func DoWrite

func DoWrite()

DoWrite Processes a Write Statement

func Emit

func Emit(s string)

Emit Ouputs a String with Tab

func EmitLn

func EmitLn(s string)

EmitLn Ouputs a String with Tab and CRLF

func Epilog

func Epilog()

Epilog Writes the Epilog

func Equals

func Equals()

Equals Recognizes and Translates a Relational "Equals"

func Error

func Error(s string)

Error Reports an Error

func Expected

func Expected(s string)

Expected Reports What Was Expected

func Expression

func Expression()

Expression Parses and Translates a Math Expression

func Factor

func Factor()

Factor Parses and Translates a Math Factor

func FirstFactor

func FirstFactor()

FirstFactor Parses and Translates a Leading Factor

func FirstTerm

func FirstTerm()

FirstTerm Parses and Translates a Leading Term

func GetChar

func GetChar()

GetChar Reads New Character From Input Stream

func GetName

func GetName()

GetName Gets an Identifier

func GetNum

func GetNum() (val int)

GetNum Gets a Number

func Go

func Go()

Go starts the execution of this chapter

func Greater

func Greater()

Greater Recognizes and Translates a Relational "Greater Than"

func Header

func Header()

Header Writes Header Info

func InTable

func InTable(n string) bool

InTable Looks for Symbol in Table

func Init

func Init()

Init Initializes

func IsAddOp

func IsAddOp(r rune) bool

IsAddOp Recognizes an AddOp

func IsAlNum

func IsAlNum(r rune) bool

IsAlNum Recognizes an Alphanumeric Character

func IsAlpha

func IsAlpha(r rune) bool

IsAlpha Recognizes an Alpha Character

func IsDigit

func IsDigit(r rune) bool

IsDigit Recognizes a Decimal Digit

func IsMulOp

func IsMulOp(r rune) bool

IsMulOp Recognizes a MulOp

func IsOrOp

func IsOrOp(r rune) bool

IsOrOp Recognizes a Boolean OrOp

func IsRelOp

func IsRelOp(r rune) bool

IsRelOp Recognizes a RelOp

func IsWhite

func IsWhite(r rune) bool

IsWhite Recognizes White Space

func Less

func Less()

Less Recognizes and Translates a Relational "Less Than"

func LessOrEqual

func LessOrEqual()

LessOrEqual Recognizes and Translates a Relational "Less Than or Equal"

func LoadConst

func LoadConst(n int)

LoadConst Loads a Constant Value to Primary Register

func LoadVar

func LoadVar(name string)

LoadVar Loads a Variable to Primary Register

func Locate

func Locate(n string) int

Locate Locates a Symbol in Table

func Lookup

func Lookup(table []string, s string, n int) int

Lookup Looks Up Tokens in the Keyword Table

func Main

func Main()

Main Parses and Translates a Main PROGRAM

func Match

func Match(x rune)

Match Matches a Specific Input Character

func MatchString

func MatchString(x string)

MatchString Matches a Specific Input String

func Multiply

func Multiply()

Multiply Recognizes and Translates a Multiply

func NegFactor

func NegFactor()

NegFactor Parses and Translates a Negative Factor

func Negate

func Negate()

Negate Negates the Primary Register

func NewLabel

func NewLabel() (out string)

NewLabel Generates a Unique label

func NewLine

func NewLine()

NewLine Skips Over an End-of-Line

func NotEqual

func NotEqual()

NotEqual Recognizes and Translates a Relational "Not Equals"

func NotFactor

func NotFactor()

NotFactor Parses and Translates a Boolean Factor with Leading NOT

func NotIt

func NotIt()

NotIt Complements the Primary Register

func PopAdd

func PopAdd()

PopAdd Adds Top of Stack to Primary

func PopAnd

func PopAnd()

PopAnd ANDs Top of Stack with Primary

func PopCompare

func PopCompare()

PopCompare Compares Top of Stack with Primary

func PopDiv

func PopDiv()

PopDiv Divides Top of Stack by Primary

func PopMul

func PopMul()

PopMul Multiplies Top of Stack by Primary

func PopOr

func PopOr()

PopOr ORs Top of Stack with Primary

func PopSub

func PopSub()

PopSub Subtracts Primary from Top of Stack

func PopXor

func PopXor()

PopXor XORs Top of Stack with Primary

func PostLabel

func PostLabel(l string)

PostLabel Posts a Label to Outputs

func Prog

func Prog()

Prog Parses and Translates a Program

func Prolog

func Prolog()

Prolog Writes the Prolog

func Push

func Push()

Push Pushes Primary onto Stack

func ReadVar

func ReadVar()

ReadVar Reads Variable to Primary Register

func Relation

func Relation()

Relation Parses and Translates a Relation

func Scan

func Scan()

Scan Gets an Identifier and Scans it for Keywords

func SetEqual

func SetEqual()

SetEqual Sets D0 if Compare was =

func SetGreater

func SetGreater()

SetGreater Sets D0 If Compare was >

func SetGreaterOrEqual

func SetGreaterOrEqual()

SetGreaterOrEqual Sets D0 if Compare was >= 0

func SetLess

func SetLess()

SetLess Sets D0 if Compare was <

func SetLessOrEqual

func SetLessOrEqual()

SetLessOrEqual Sets D0 if Compare was <= 0

func SetNEqual

func SetNEqual()

SetNEqual Sets D0

func SkipWhite

func SkipWhite()

SkipWhite Skips Over Leading White Space

func Store

func Store(name string)

Store Stores Primary to Variable

func Subtract

func Subtract()

Subtract Recognizes and Translates a Subtract

func Term

func Term()

Term Parses and Translates a Math Term

func Term1

func Term1()

Term1 Is Common Code Used by Term and FirstTerm

func TopDecls

func TopDecls()

TopDecls Parses and Translates Global Declarations

func Undefined

func Undefined(n string)

Undefined Reports an Undefined Identifier

func WriteVar

func WriteVar()

WriteVar Writes Variable from Primary Register