Modified the test a bit, gonna just merge whatever I have now and do work on the ESDI instead

README.md

@@ -1,14 +1,115 @@
+# TODO
+- [x] Read live telemetry (from a live session or replay)
+- [x] Read data from a stored `.ibt` file
+- [x] Allow to export the data to an `.ibt` file
+- [x] Allow to export the session info data to a `.yaml` file
+- [ ] Make sure variables with multiple counts are correctly parsed and stored
+- [ ] Correctly support and implement the bitFields data
+- [ ] Add the message broadcasting system
+- [ ] Explore a more convenient API for fetching the data for the SDK user
+- [ ] Change the pattern in which the data is fetched from the telemetry and
+how it is exported into `.ibt` files
+
+
 # About
-This project will be able to parse `.ibt` files, read live data from races and
-broadcast messages to the service. Its still not very mature at all, but after
-this commit I will turn it into a package instead and give it a stable API.
-Will also put some examples then.
+This project is a simple Go SDK for the popular iRacing racing simulator.
+It has the capabilites to:
+- Read live data (live session or replay)
+- Read data from a `.ibt` telemetry file
+
+It should run on Linux, MacOS and Windows. With the caveat that live sessions
+only happen on Windows (that I know about), therefore Linux and MacOS can only
+read data from telemetry files.
 
 
-## The SDK
-I used various sources to develop and understand how `iRacing` works, and learn
-a lot with it. Once I have matured this project a bit I will document its
-inner workings too.
+## Usage
+The SDK instance is created by calling `goirsdk.Init(Reader, exportTelem, exportYAML)`
+- `Reader` is a variable that implements the interface:
+```go
+type Reader interface {
+	io.Reader
+	io.ReaderAt
+	io.ReadCloser
+}
+```
+To read data from a `.ibt` file, the user should pass the `*os.File` of it, and
+to read live telemetry the user should pass nil
+
+- `exportTelem` should be an empty string if the user doesn't want to export
+the data, otherwise pass a string with the path for the destination telemetry
+file
+
+- `exportYAML` is just like the exportTelem but for the session info `yaml` data
+
+### Example
+```go
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"github.com/ESilva15/goirsdk"
+)
+
+func msToKph(v float32) int {
+	return int((3600 * v) / 1000)
+}
+
+func main() {
+	// Open the data source file
+	file, err := os.Open("/path/to/ibtFile")
+	if err != nil {
+		log.Fatalf("Failed to open IBT file: %v", err)
+	}
+
+	// Instantiate our iRacing SDK instance
+	irsdk, err := goirsdk.Init(file, "", "")
+	if err != nil {
+		log.Fatalf("Failed to create iRacing interface: %v", err)
+	}
+	defer irsdk.Close()
+
+	// Set up a loop to iterate our data
+	mainLoopTicker := time.NewTicker(time.Second / 60)
+	defer mainLoopTicker.Stop()
+
+	for {
+		// Update the data that the SDK is holding with the next tick
+		_, err := irsdk.Update(100 * time.Millisecond)
+		if err != nil {
+			log.Printf("could not update data: %v", err)
+			continue
+		}
+
+		// Vehicle Movement data gathered from the names we can find on the
+		// telemetry_docs.pdf file
+		// - I wish to make this less verbose if possible
+		if _, ok := irsdk.Vars.Vars["Gear"]; !ok {
+			log.Fatal("Field `Gear` doesn't exist")
+		}
+
+		if _, ok := irsdk.Vars.Vars["RPM"]; !ok {
+			log.Fatal("Field `RPM` doesn't exist")
+		}
+
+		if _, ok := irsdk.Vars.Vars["Speed"]; !ok {
+			log.Fatal("Field `Speed` doesn't exist")
+		}
+
+		gear := int32(irsdk.Vars.Vars["Gear"].Value.(int))
+		rpm := int32(irsdk.Vars.Vars["RPM"].Value.(float32))
+		speed := int32(msToKph(irsdk.Vars.Vars["Speed"].Value.(float32)))
+
+		fmt.Printf("\033[?25l\033[2J\033[H")
+		fmt.Printf("Gear: %d, RPM: %d, Speed: %d", gear, rpm, speed)
+
+		<-mainLoopTicker.C
+	}
+}
+```
 
 
 ## SharedMem

diskSubHeader.go

@@ -1,6 +1,8 @@
 package goirsdk
 
 import (
+	"github.com/ESilva15/goirsdk/logger"
+
 	"bytes"
 	"encoding/binary"
 	"fmt"
@@ -19,6 +21,31 @@ type DiskSubHeader struct {
 	RecordCount int32   // RecordCount holds the number of data frames
 }
 
+// readSubheader will read the subheader contents out of the telemetry data
+func (i *IBT) readSubheader() error {
+	log := logger.GetInstance()
+
+	var subheaderRaw [SubHeaderSize]byte
+	_, err := i.File.ReadAt(subheaderRaw[:], HeaderSize)
+	if err != nil {
+		return fmt.Errorf("Failed to read disk subheaders from file: %v", err)
+	}
+	i.SubHeaders, err = parseTelemetrySubHeader(subheaderRaw)
+	if err != nil {
+		return fmt.Errorf("Unable to parse disk subheaders from file: %v", err)
+	}
+
+	// Write to the output file - TODO add the check
+	if i.IBTExport != nil {
+    err = i.exportIBT(subheaderRaw[:], HeaderSize)
+		if err != nil {
+      log.Printf("Failed to export subheaders: %v\n", err)
+		}
+	}
+
+	return nil
+}
+
 // parseTelemetrySubHeader will return a pointer to a DiskSubHeader variable
 // or nil if an error occurs. In which case the error return value is more
 // valuable

examples/example.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"github.com/ESilva15/goirsdk"
+)
+
+func msToKph(v float32) int {
+	return int((3600 * v) / 1000)
+}
+
+func main() {
+	// Open the data source file
+	file, err := os.Open("/path/to/ibtFile")
+	if err != nil {
+		log.Fatalf("Failed to open IBT file: %v", err)
+	}
+
+	// Instantiate our iRacing SDK instance
+	irsdk, err := goirsdk.Init(file, "", "")
+	if err != nil {
+		log.Fatalf("Failed to create iRacing interface: %v", err)
+	}
+	defer irsdk.Close()
+
+	// Set up a loop to iterate our data
+	mainLoopTicker := time.NewTicker(time.Second / 60)
+	defer mainLoopTicker.Stop()
+
+	for {
+		// Update the data that the SDK is holding with the next tick
+		_, err := irsdk.Update(100 * time.Millisecond)
+		if err != nil {
+			log.Printf("could not update data: %v", err)
+			continue
+		}
+
+		// Vehicle Movement data gathered from the names we can find on the
+		// telemetry_docs.pdf file
+		// - I wish to make this less verbose if possible
+		if _, ok := irsdk.Vars.Vars["Gear"]; !ok {
+			log.Fatal("Field `Gear` doesn't exist")
+		}
+
+		if _, ok := irsdk.Vars.Vars["RPM"]; !ok {
+			log.Fatal("Field `RPM` doesn't exist")
+		}
+
+		if _, ok := irsdk.Vars.Vars["Speed"]; !ok {
+			log.Fatal("Field `Speed` doesn't exist")
+		}
+
+		gear := int32(irsdk.Vars.Vars["Gear"].Value.(int))
+		rpm := int32(irsdk.Vars.Vars["RPM"].Value.(float32))
+		speed := int32(msToKph(irsdk.Vars.Vars["Speed"].Value.(float32)))
+
+		fmt.Printf("\033[?25l\033[2J\033[H")
+		fmt.Printf("Gear: %d, RPM: %d, Speed: %d", gear, rpm, speed)
+
+		<-mainLoopTicker.C
+	}
+}

go.mod

@@ -1,10 +1,10 @@
-module github.com/ESilva15/goirsdk
-
-go 1.23.2
-
-require (
-	github.com/google/go-cmp v0.6.0
-	golang.org/x/sys v0.26.0
-	golang.org/x/text v0.19.0
-	gopkg.in/yaml.v3 v3.0.1
-)
+module github.com/ESilva15/goirsdk
+
+go 1.23.2
+
+require (
+	github.com/google/go-cmp v0.6.0
+	golang.org/x/sys v0.29.0
+	golang.org/x/text v0.19.0
+	gopkg.in/yaml.v3 v3.0.1
+)

go.sum

@@ -1,10 +1,10 @@
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-golang.org/x/sys v0.26.0 h1:KHjCJyddX0LoSTb3J+vWpupP9p0oznkqVk/IfjymZbo=
-golang.org/x/sys v0.26.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.19.0 h1:kTxAhCbGbxhK0IwgSKiMO5awPoDQ0RpfiVYBfK860YM=
-golang.org/x/text v0.19.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.19.0 h1:kTxAhCbGbxhK0IwgSKiMO5awPoDQ0RpfiVYBfK860YM=
+golang.org/x/text v0.19.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

headers.go

@@ -1,6 +1,8 @@
 package goirsdk
 
 import (
+	"github.com/ESilva15/goirsdk/logger"
+
 	"bytes"
 	"encoding/binary"
 	"fmt"
@@ -39,6 +41,47 @@ type TelemetryHeaders struct {
 	BufOffset int32
 }
 
+// readHeader will read the header out of the telemetry data
+func (i *IBT) readHeader() error {
+	log := logger.GetInstance()
+
+	var headerRaw [FileHeaderSize]byte
+	_, err := i.File.ReadAt(headerRaw[:], 0)
+	if err != nil {
+		return fmt.Errorf("Failed to read headers from file: %v", err)
+	}
+	i.Headers, err = parseTelemetryHeader(headerRaw)
+	if err != nil {
+		return fmt.Errorf("Unable to read headers from file: %v", err)
+	}
+
+	// Write to the output file - TODO: this should only write if necessary
+	if i.IBTExport != nil {
+    err = i.exportIBT(headerRaw[:], 0)
+		if err != nil {
+      log.Printf("Failed to export headers: %v\n", err)
+		}
+	}
+
+	return nil
+}
+
+// parseTelemetryHeader will read the IBT file headers from a correctly sized
+// buffer.
+// You need to pass a the first FILE_HEADER_SIZE bytes of the buffer
+func parseTelemetryHeader(buf [FileHeaderSize]byte) (*TelemetryHeaders, error) {
+	// utils.HexDump(buf[:])
+	// fmt.Printf("Len: %d\n", len(buf))
+
+	dst := TelemetryHeaders{}
+	err := binary.Read(bytes.NewBuffer(buf[:]), binary.LittleEndian, &dst)
+	if err != nil {
+		return nil, fmt.Errorf("unable to unpack data: %v", err)
+	}
+
+	return &dst, nil
+}
+
 // ToString renders a string showing the values of the struct
 func (th *TelemetryHeaders) ToString() string {
 	return fmt.Sprintf(
@@ -61,19 +104,3 @@ func (th *TelemetryHeaders) ToString() string {
 		th.NumBuf, th.NumBuf, th.BufLen, th.BufLen, th.BufOffset, th.BufOffset,
 	)
 }
-
-// parseTelemetryHeader will read the IBT file headers from a correctly sized
-// buffer.
-// You need to pass a the first FILE_HEADER_SIZE bytes of the buffer
-func parseTelemetryHeader(buf [FileHeaderSize]byte) (*TelemetryHeaders, error) {
-	// utils.HexDump(buf[:])
-	// fmt.Printf("Len: %d\n", len(buf))
-
-	dst := TelemetryHeaders{}
-	err := binary.Read(bytes.NewBuffer(buf[:]), binary.LittleEndian, &dst)
-	if err != nil {
-		return nil, fmt.Errorf("unable to unpack data: %v", err)
-	}
-
-	return &dst, nil
-}

irsdk.go

@@ -2,13 +2,12 @@
 package goirsdk
 
 import (
-	"github.com/ESilva15/goirsdk/logger"
-
 	"fmt"
 	"os"
 
 	"io"
 
+	"github.com/ESilva15/goirsdk/logger"
 	"github.com/ESilva15/goirsdk/winutils"
 	"gopkg.in/yaml.v3"
 )
@@ -31,14 +30,16 @@ type Reader interface {
 
 // IBT struct will hold the relevant data for a given IBT file
 type IBT struct {
-	File         Reader                    // Source of the data
-	FileToExport *os.File                  // If set, it will export the IBT data to the file
-	YAMLExport   *os.File                  // If set, it will export the session YAML to the file
-	Headers      *TelemetryHeaders         // IBT file Headers
-	SubHeaders   *DiskSubHeader            // IBT file Sub Headers
-	SessionInfo  *SessionInfoYAML          // IBT file Session Info
-	Vars         *TelemetryVars            // Vars will hold the telemetry data
-	winUtils     *winutils.IRacingWinUtils // WinUtils gives access to the system utilities
+	File           Reader                    // Source of the data
+	IBTExport      *os.File                  // If set, it will export the IBT data to the file
+	IBTExportPath  string                    // Path for IBT export
+	YAMLExport     *os.File                  // If set, it will export the session YAML to the file
+	YAMLExportPath string                    // Path for YAML export
+	Headers        *TelemetryHeaders         // IBT file Headers
+	SubHeaders     *DiskSubHeader            // IBT file Sub Headers
+	SessionInfo    *SessionInfoYAML          // IBT file Session Info
+	Vars           *TelemetryVars            // Vars will hold the telemetry data
+	winUtils       *winutils.IRacingWinUtils // WinUtils gives access to the system utilities
 }
 
 func (i *IBT) IsConnected() bool {
@@ -54,9 +55,12 @@ func (i *IBT) IsConnected() bool {
 	return false
 }
 
-func (i *IBT) exportYAML(path string) error {
-	file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
+func (i *IBT) exportYAML() error {
+	log := logger.GetInstance()
+
+	file, err := os.OpenFile(i.YAMLExportPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
 	if err != nil {
+		log.Printf("Failed to open file for YAML export: %v\n", err)
 		return fmt.Errorf("failed to open output file for YAML: %v", err)
 	}
 	defer file.Close()
@@ -65,29 +69,53 @@ func (i *IBT) exportYAML(path string) error {
 
 	err = enc.Encode(i.SessionInfo)
 	if err != nil {
+		log.Printf("Failed to write into file for YAML export: %v\n", err)
 		return fmt.Errorf("failed to write YAML contents to file: %v", err)
 	}
 
 	return nil
 }
 
-// Init serves to initialize and get a hold of a IBT struct
-func Init(f Reader, exportTelem string, exportYAML string) (*IBT, error) {
+func (i *IBT) exportIBT(data []byte, offset int64) error {
 	log := logger.GetInstance()
 
+	_, err := i.IBTExport.WriteAt(data, offset)
+
+	if err != nil {
+		i.IBTExport.Close()
+		i.IBTExport = nil
+		log.Println("Won't attempt to export anymore")
+		return err
+	}
+
+	return nil
+}
+
+// Init serves to initialize and get a hold of a IBT struct
+// f -> is the source data, pass nil for the SDK to read live data or a
+// *os.File to read from a file
+// exportTelem -> is a string with the path to export the telemetry data, pass
+// an empty string to not export any data
+// exportTelem -> is a string with the path to export the session info data, pass
+// an empty string to not export any data
+func Init(f Reader, exportTelem string, exportYAML string) (*IBT, error) {
+	// log := logger.GetInstance()
+
 	// Read the header of the file
 	var err error
 	ibt := IBT{
-		File:         f,
-		FileToExport: nil,
-		YAMLExport:   nil,
-		Vars:         &TelemetryVars{},
-		winUtils:     nil,
+		File:           f,
+		IBTExport:      nil,
+		IBTExportPath:  exportTelem,
+		YAMLExport:     nil,
+		YAMLExportPath: exportYAML,
+		Vars:           &TelemetryVars{},
+		winUtils:       nil,
 	}
 
 	// If requested to output to a telemetry file
 	if exportTelem != "" {
-		ibt.FileToExport, err = os.OpenFile(exportTelem, os.O_CREATE|os.O_RDWR, 0644)
+		ibt.IBTExport, err = os.OpenFile(exportTelem, os.O_CREATE|os.O_RDWR, 0644)
 		if err != nil {
 			return nil, fmt.Errorf("failed to open ibt export file: %v", err)
 		}
@@ -122,59 +150,21 @@ func Init(f Reader, exportTelem string, exportYAML string) (*IBT, error) {
 	}
 
 	// Read the file headers
-	var headerRaw [FileHeaderSize]byte
-	_, err = ibt.File.ReadAt(headerRaw[:], 0)
+	err = ibt.readHeader()
 	if err != nil {
-		return nil, fmt.Errorf("Failed to read headers from file: %v", err)
-	}
-	ibt.Headers, err = parseTelemetryHeader(headerRaw)
-	if err != nil {
-		return nil, fmt.Errorf("Unable to read headers from file: %v", err)
-	}
-	// Write to the output file
-	_, err = ibt.FileToExport.WriteAt(headerRaw[:], 0)
-	if err != nil {
-		log.Fatal(err)
+		return nil, err
 	}
 
 	// Read the disk sub headers
-	var subheaderRaw [SubHeaderSize]byte
-	_, err = ibt.File.ReadAt(subheaderRaw[:], HeaderSize)
+	err = ibt.readSubheader()
 	if err != nil {
-		return nil, fmt.Errorf("Failed to read disk subheaders from file: %v", err)
-	}
-	ibt.SubHeaders, err = parseTelemetrySubHeader(subheaderRaw)
-	if err != nil {
-		return nil, fmt.Errorf("Unable to parse disk subheaders from file: %v", err)
-	}
-	// Write to the output file
-	_, err = ibt.FileToExport.WriteAt(subheaderRaw[:], HeaderSize)
-	if err != nil {
-		log.Fatal(err)
+		return nil, err
 	}
 
 	// Read session info string
-	sessionInfoStringRaw := make([]byte, ibt.Headers.SessionInfoLength)
-	_, err = ibt.File.ReadAt(sessionInfoStringRaw, int64(ibt.Headers.SessionInfoOffset))
+	err = ibt.readSessionInfo()
 	if err != nil {
-		return nil, fmt.Errorf("Failed to read sessionInfoString from file: %v", err)
-	}
-	// Write to the output file
-	_, err = ibt.FileToExport.WriteAt(sessionInfoStringRaw[:], int64(ibt.Headers.SessionInfoOffset))
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	ibt.SessionInfo, err = parseSessionInfo(sessionInfoStringRaw, ibt.Headers.SessionInfoLength)
-	if err != nil {
-		return nil, fmt.Errorf("Unable to parse SessionInfoString from file: %v", err)
-	}
-	// Write to YAML output file
-	if exportYAML != "" {
-		err := ibt.exportYAML(exportYAML)
-		if err != nil {
-			return nil, err
-		}
+		return nil, err
 	}
 
 	// Read the telemetry vars info
@@ -186,6 +176,7 @@ func Init(f Reader, exportTelem string, exportYAML string) (*IBT, error) {
 	return &ibt, nil
 }
 
+// Close cleans up our irsdk instance
 func (i *IBT) Close() {
 	if i.winUtils != nil {
 		// If its not live data, the user is the one with ownership of the handle

irsdk_test.go

@@ -0,0 +1,101 @@
+package goirsdk
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"sort"
+	"testing"
+	"time"
+)
+
+type StandingsLine struct {
+	CarIdx     int
+	LapPct     float32
+	Lap        int32
+	DriverName string
+	EstTime    float32
+	TimeBehind float32
+}
+
+func lapTimeRepresentation(t float32) string {
+	if t < 0 {
+		t = 0
+	}
+
+	wholeSeconds := int64(t)
+	lapTime := time.Unix(wholeSeconds, int64((t-float32(wholeSeconds))*1e9))
+
+	return lapTime.Format("04:05.000")
+}
+
+func TestFunctionality(t *testing.T) {
+	input, err := os.Open("../testTelemetry/supercars_race_watkins_glenn.ibt")
+	if err != nil {
+		t.Fatal("Was unable to prepare telemetry file for testing.")
+	}
+
+	i, _ := Init(input, "", "")
+	defer i.Close()
+
+	// Set up a loop to iterate our data
+	mainLoopTicker := time.NewTicker(time.Second / 60)
+	defer mainLoopTicker.Stop()
+
+	for {
+		// Update the data that the SDK is holding with the next tick
+		_, err := i.Update(100 * time.Millisecond)
+		if err != nil {
+			log.Printf("could not update data: %v", err)
+			continue
+		}
+
+		// Vehicle Movement data gathered from the names we can find on the
+		// telemetry_docs.pdf file
+		// - I wish to make this less verbose if possible
+		if _, ok := i.Vars.Vars["CarIdxPosition"]; !ok {
+			log.Fatal("Field `CarIdxPosition` doesn't exist")
+		}
+		driversLapDistPct := i.Vars.Vars["CarIdxLapDistPct"].Value.([]float32)
+		driversEstTime := i.Vars.Vars["CarIdxEstTime"].Value.([]float32)
+		driversLap := i.Vars.Vars["CarIdxLap"].Value.([]int32)
+		// driversBehind := i.Vars.Vars["CarIdxF2Time"].Value.([]float32)
+
+		drivers := i.SessionInfo.DriverInfo.Drivers
+    myIdx := i.SessionInfo.DriverInfo.DriverCarIdx
+
+		standings := make([]StandingsLine, len(drivers))
+
+		fmt.Printf("\033[?25l\033[2J\033[H")
+		for k := range len(drivers) {
+			if drivers[k].CarIsPaceCar == 1 || drivers[k].IsSpectator == 1 {
+				continue
+			}
+
+			standings[k] = StandingsLine{
+				CarIdx:     k,
+				LapPct:     driversLapDistPct[k],
+				DriverName: drivers[k].UserName,
+				EstTime:    driversEstTime[k],
+				Lap:        driversLap[k],
+				TimeBehind: driversEstTime[myIdx],
+			}
+		}
+
+		sort.Slice(standings, func(i int, j int) bool {
+			if standings[i].Lap > int32(standings[j].Lap) {
+				return true
+			}
+
+			return standings[i].LapPct >= standings[j].LapPct
+		})
+
+    fmt.Printf("%v\n", driversEstTime)
+		// for p, v := range standings {
+		// 	fmt.Printf("[%2d] %-30s %13f %13f\n",
+		// 		p+1, v.DriverName, v.LapPct, driversEstTime[p] - driversEstTime[myIdx])
+		// }
+
+		<-mainLoopTicker.C
+	}
+}

sessionInfo.go

@@ -1,7 +1,10 @@
 package goirsdk
 
 import (
+	"github.com/ESilva15/goirsdk/logger"
+
 	"encoding/json"
+	"fmt"
 	"log"
 	"strings"
 
@@ -307,6 +310,40 @@ type Driver struct {
 	TeamIncidentCount       int     `yaml:"TeamIncidentCount"`
 }
 
+// readSessionInfo will read the session info yaml out of the telemetry data
+func (i *IBT) readSessionInfo() error {
+	log := logger.GetInstance()
+
+	sessionInfoStringRaw := make([]byte, i.Headers.SessionInfoLength)
+	_, err := i.File.ReadAt(sessionInfoStringRaw, int64(i.Headers.SessionInfoOffset))
+	if err != nil {
+		return fmt.Errorf("Failed to read sessionInfoString from file: %v", err)
+	}
+
+	// Write to the output file
+	if i.IBTExport != nil {
+		err := i.exportIBT(sessionInfoStringRaw[:], int64(i.Headers.SessionInfoOffset))
+		if err != nil {
+			log.Printf("Failed to export offline telemetry data: %v", err)
+		}
+	}
+
+	i.SessionInfo, err = parseSessionInfo(sessionInfoStringRaw, i.Headers.SessionInfoLength)
+	if err != nil {
+		return fmt.Errorf("Unable to parse SessionInfoString from file: %v", err)
+	}
+
+	// Write to YAML output file
+	if i.YAMLExportPath != "" {
+		err := i.exportYAML()
+		if err != nil {
+			log.Printf("Failed to export YAML string: %v\n", err)
+		}
+	}
+
+	return nil
+}
+
 // parseSessionInfo will parse the sessionInfo buffer into the SessionInfoYAML
 // struct
 func parseSessionInfo(buf []byte, len int32) (*SessionInfoYAML, error) {

variables.go

@@ -71,6 +71,20 @@ type Var struct {
 	Value interface{}
 }
 
+func (v *Var) ToString() string {
+	return fmt.Sprintf(
+		"Type:        %5d (0x%08x)\n"+
+			"Offset:      %5d (0x%08x)\n"+
+			"Count:       %5d (0x%08x)\n"+
+			"CountAsTime: %5t\n"+
+			"Name:        %s\n"+
+			"Description: %s\n"+
+			"Unit:        %s",
+		v.Type, v.Type, v.Offset, v.Offset, v.Count, v.Count,
+		v.CountAsTime, v.Name, v.Description, v.Unit,
+	)
+}
+
 func (v *IBTVar) ToString() string {
 	return fmt.Sprintf(
 		"Type:        %5d (0x%08x)\n"+
@@ -108,9 +122,12 @@ func (i *IBT) readVariablerHeaders() error {
 			return err
 		}
 
-		_, err = i.FileToExport.WriteAt(rbuf, int64(i.Headers.VarHeaderOffset+k*VarHeaderSize))
-		if err != nil {
-			log.Fatal(err)
+		if i.IBTExport != nil {
+			err = i.exportIBT(rbuf, int64(i.Headers.VarHeaderOffset+k*VarHeaderSize))
+			if err != nil {
+				// Don't outright kill it here - maybe nowhere else
+				log.Printf("Failed to export variable contents: %v\n", err)
+			}
 		}
 
 		var dst IBTVar
@@ -144,17 +161,103 @@ func (i *IBT) readData(buf []byte) error {
 		// Read the value
 		switch v.Type {
 		case IRSDK_char:
-			v.Value = string(rbuf[0])
+			if v.Count > 1 {
+				// Array of data
+				data := make([]string, v.Count)
+				for entry := 0; entry < int(v.Count); entry++ {
+					entryOffset := v.Offset + int32(entry)*int32(VarTypes[int(v.Type)].Size)
+					rbuf := buf[entryOffset : entryOffset+int32(VarTypes[int(v.Type)].Size)]
+
+					newValue := string(rbuf[0])
+					data[entry] = newValue
+				}
+
+				v.Value = data
+			} else {
+				// Single value
+				v.Value = string(rbuf[0])
+			}
 		case IRSDK_bool:
-			v.Value = int(rbuf[0]) > 0
+			if v.Count > 1 {
+				// Array of data
+				data := make([]bool, v.Count)
+				for entry := 0; entry < int(v.Count); entry++ {
+					entryOffset := v.Offset + int32(entry)*int32(VarTypes[int(v.Type)].Size)
+					rbuf := buf[entryOffset : entryOffset+int32(VarTypes[int(v.Type)].Size)]
+
+					newValue := int(rbuf[0]) > 0
+					data[entry] = newValue
+				}
+
+				v.Value = data
+			} else {
+				// Single value
+				v.Value = int(rbuf[0]) > 0
+			}
 		case IRSDK_int:
-			v.Value = int(binary.LittleEndian.Uint32(rbuf))
+			if v.Count > 1 {
+				// Array of data
+				data := make([]int32, v.Count)
+				for entry := 0; entry < int(v.Count); entry++ {
+					entryOffset := v.Offset + int32(entry)*int32(VarTypes[int(v.Type)].Size)
+					rbuf := buf[entryOffset : entryOffset+int32(VarTypes[int(v.Type)].Size)]
+					newValue := int32(binary.LittleEndian.Uint32(rbuf))
+					data[entry] = newValue
+				}
+
+				v.Value = data
+			} else {
+				// Single value
+				v.Value = int(binary.LittleEndian.Uint32(rbuf))
+			}
 		case IRSDK_bitField:
-			v.Value = fmt.Sprintf("0x%x", int(binary.LittleEndian.Uint32(rbuf)))
+			if v.Count > 1 {
+				// Array of data
+				data := make([]string, v.Count)
+				for entry := 0; entry < int(v.Count); entry++ {
+					entryOffset := v.Offset + int32(entry)*int32(VarTypes[int(v.Type)].Size)
+					rbuf := buf[entryOffset : entryOffset+int32(VarTypes[int(v.Type)].Size)]
+					newValue := fmt.Sprintf("0x%x", int(binary.LittleEndian.Uint32(rbuf)))
+					data[entry] = newValue
+				}
+
+				v.Value = data
+			} else {
+				// Single value
+				v.Value = fmt.Sprintf("0x%x", int(binary.LittleEndian.Uint32(rbuf)))
+			}
 		case IRSDK_float:
-			v.Value = math.Float32frombits(uint32(binary.LittleEndian.Uint32(rbuf)))
+			if v.Count > 1 {
+				// Array of data
+				data := make([]float32, v.Count)
+				for entry := 0; entry < int(v.Count); entry++ {
+					entryOffset := v.Offset + int32(entry)*int32(VarTypes[int(v.Type)].Size)
+					rbuf := buf[entryOffset : entryOffset+int32(VarTypes[int(v.Type)].Size)]
+					newValue := math.Float32frombits(uint32(binary.LittleEndian.Uint32(rbuf)))
+					data[entry] = newValue
+				}
+
+				v.Value = data
+			} else {
+				// Single value
+				v.Value = math.Float32frombits(uint32(binary.LittleEndian.Uint32(rbuf)))
+			}
 		case IRSDK_double:
-			v.Value = math.Float64frombits(uint64(binary.LittleEndian.Uint64(rbuf)))
+			if v.Count > 1 {
+				// Array of data
+				data := make([]float64, v.Count)
+				for entry := 0; entry < int(v.Count); entry++ {
+					entryOffset := v.Offset + int32(entry)*int32(VarTypes[int(v.Type)].Size)
+					rbuf := buf[entryOffset : entryOffset+int32(VarTypes[int(v.Type)].Size)]
+					newValue := math.Float64frombits(uint64(binary.LittleEndian.Uint64(rbuf)))
+					data[entry] = newValue
+				}
+
+				v.Value = data
+			} else {
+				// Single value
+				v.Value = math.Float64frombits(uint64(binary.LittleEndian.Uint64(rbuf)))
+			}
 		}
 		// --------------
 
@@ -164,6 +267,8 @@ func (i *IBT) readData(buf []byte) error {
 	return nil
 }
 
+// Update will read the next data chunk from the telemetry data, works for both the
+// live and offline data
 func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 	if i.winUtils != nil {
 		// Put a way to check if the sim is active here
@@ -203,9 +308,11 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 			return Failed, err
 		}
 
-		_, err = i.FileToExport.WriteAt(buf, int64(i.Headers.BufOffset+i.Vars.RecorderTick*i.Headers.BufLen))
-		if err != nil {
-			log.Fatalf("Failed to write to file [2]: %v", err)
+		if i.IBTExport != nil {
+			err = i.exportIBT(buf, int64(i.Headers.BufOffset+i.Vars.RecorderTick*i.Headers.BufLen))
+			if err != nil {
+				log.Printf("Failed to export live telemetry data: %v", err)
+			}
 		}
 
 		err = i.readData(buf)
@@ -217,6 +324,7 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 			return Ended, nil
 		}
 
+    // Document why this is here, I don't remember the exact words right now
 		i.Vars.RecorderTick++
 	} else {
 		// This will get the dataframe corresponding to a given tick
@@ -226,9 +334,11 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 
 		// Make this happen in a different thread, or have this send to a queue that has a thread
 		// writing to a file
-		_, err = i.FileToExport.WriteAt(buf, int64(start))
-		if err != nil {
-			log.Fatalf("Failed to write to file [1]: %v\n", err)
+		if i.IBTExport != nil {
+			err = i.exportIBT(buf, int64(start))
+			if err != nil {
+				log.Printf("Failed to export offline telemetry data: %v", err)
+			}
 		}
 
 		if err == io.EOF {