Add NewSector function

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.23.0'
+
+    - name: Build
+      run: go build -v ./...
+      working-directory: fmp
+
+    - name: Test
+      run: go test -v ./...
+      working-directory: fmp

fmp/fmp_const.go

@@ -1,7 +1,6 @@
 package fmp
 
 type FmpError string
-type FmpChunkType uint8
 
 func (e FmpError) Error() string { return string(e) }
 
@@ -16,41 +15,305 @@ var (
 )
 
 const (
-	FMP_CHUNK_SIMPLE_DATA FmpChunkType = iota
-	FMP_CHUNK_SEGMENTED_DATA
-	FMP_CHUNK_SIMPLE_KEY_VALUE
-	FMP_CHUNK_LONG_KEY_VALUE
-	FMP_CHUNK_PATH_PUSH
-	FMP_CHUNK_PATH_POP
-	FMP_CHUNK_NOOP
+	FmpDateLayout     = "02/01/2006"
+	FmpTimeLayout     = "15:04:05"
+	FmpDateTimeLayout = "02/01/2006 15:04:05"
 )
 
+type FmpChunkType uint8
+
 const (
-	FMP_COLLATION_ENGLISH     = 0x00
-	FMP_COLLATION_FRENCH      = 0x01
-	FMP_COLLATION_GERMAN      = 0x03
-	FMP_COLLATION_ITALIAN     = 0x04
-	FMP_COLLATION_DUTCH       = 0x05
-	FMP_COLLATION_SWEDISH     = 0x07
-	FMP_COLLATION_SPANISH     = 0x08
-	FMP_COLLATION_DANISH      = 0x09
-	FMP_COLLATION_PORTUGUESE  = 0x0A
-	FMP_COLLATION_NORWEGIAN   = 0x0C
-	FMP_COLLATION_FINNISH     = 0x11
-	FMP_COLLATION_GREEK       = 0x14
-	FMP_COLLATION_ICELANDIC   = 0x15
-	FMP_COLLATION_TURKISH     = 0x18
-	FMP_COLLATION_ROMANIAN    = 0x27
-	FMP_COLLATION_POLISH      = 0x2a
-	FMP_COLLATION_HUNGARIAN   = 0x2b
-	FMP_COLLATION_RUSSIAN     = 0x31
-	FMP_COLLATION_CZECH       = 0x38
-	FMP_COLLATION_UKRAINIAN   = 0x3e
-	FMP_COLLATION_CROATIAN    = 0x42
-	FMP_COLLATION_CATALAN     = 0x49
-	FMP_COLLATION_FINNISH_ALT = 0x62
-	FMP_COLLATION_SWEDISH_ALT = 0x63
-	FMP_COLLATION_GERMAN_ALT  = 0x64
-	FMP_COLLATION_SPANISH_ALT = 0x65
-	FMP_COLLATION_ASCII       = 0x66
+	FmpChunkSimpleData FmpChunkType = iota
+	FmpChunkSegmentedData
+	FmpChunkSimpleKeyValue
+	FmpChunkLongKeyValue
+	FmpChunkPathPush
+	FmpChunkPathPushLong
+	FmpChunkPathPop
+	FmpChunkNoop
+)
+
+type FmpFieldType uint8
+
+const (
+	FmpFieldSimple      FmpFieldType = 1
+	FmpFieldCalculation FmpFieldType = 2
+	FmpFieldScript      FmpFieldType = 3
+)
+
+type FmpFieldStorageType uint8
+
+const (
+	FmpFieldStorageRegular             FmpFieldStorageType = 0
+	FmpFieldStorageGlobal              FmpFieldStorageType = 1
+	FmpFieldStorageCalculation         FmpFieldStorageType = 8
+	FmpFieldStorageUnstoredCalculation FmpFieldStorageType = 10
+)
+
+type FmpDataType uint8
+
+const (
+	FmpDataText      FmpDataType = 1
+	FmpDataNumber    FmpDataType = 2
+	FmpDataDate      FmpDataType = 3
+	FmpDataTime      FmpDataType = 4
+	FmpDataTS        FmpDataType = 5
+	FmpDataContainer FmpDataType = 6
+)
+
+type FmpAutoEnterOption uint8
+
+const (
+	FmpAutoEnterData FmpAutoEnterOption = iota
+	FmpAutoEnterSerialNumber
+	FmpAutoEnterCalculation
+	FmpAutoEnterCalculationReplacingExistingValue
+	FmpAutoEnterFromLastVisitedRecord
+	FmpAutoEnterCreateDate
+	FmpAutoEnterCreateTime
+	FmpAutoEnterCreateTS
+	FmpAutoEnterCreateName
+	FmpAutoEnterCreateAccountName
+	FmpAutoEnterModDate
+	FmpAutoEnterModTime
+	FmpAutoEnterModTS
+	FmpAutoEnterModName
+	FmpAutoEnterModAccountName
+)
+
+var autoEnterPresetMap = map[uint8]FmpAutoEnterOption{
+	0: FmpAutoEnterCreateDate,
+	1: FmpAutoEnterCreateTime,
+	2: FmpAutoEnterCreateTS,
+	3: FmpAutoEnterCreateName,
+	4: FmpAutoEnterCreateAccountName,
+	5: FmpAutoEnterModDate,
+	6: FmpAutoEnterModTime,
+	7: FmpAutoEnterModTS,
+	8: FmpAutoEnterModName,
+	9: FmpAutoEnterModAccountName,
+}
+
+var autoEnterOptionMap = map[uint8]FmpAutoEnterOption{
+	2:   FmpAutoEnterSerialNumber,
+	4:   FmpAutoEnterData,
+	8:   FmpAutoEnterCalculation,
+	16:  FmpAutoEnterFromLastVisitedRecord,
+	32:  FmpAutoEnterCalculation,
+	136: FmpAutoEnterCalculationReplacingExistingValue,
+}
+
+type FmpCalculationOperator byte
+
+const (
+	FmpCalcOperatorAdd         FmpCalculationOperator = '+'
+	FmpCalcOperatorSubtract    FmpCalculationOperator = '-'
+	FmpCalcOperatorMultiply    FmpCalculationOperator = '*'
+	FmpCalcOperatorDivide      FmpCalculationOperator = '/'
+	FmpCalcOperatorConcatenate FmpCalculationOperator = '&'
+)
+
+// var calcOperatorMap = map[uint8]FmpCalculationOperator{
+// 	0x25: FmpCalcOperatorAdd,
+// 	0x26: FmpCalcOperatorSubtract,
+// 	0x27: FmpCalcOperatorMultiply,
+// 	0x28: FmpCalcOperatorDivide,
+// 	0x50: FmpCalcOperatorConcatenate,
+// }
+
+type FmpScriptStepType uint64
+
+const (
+	FmpScriptPerformScript                     FmpScriptStepType = 1
+	FmpScriptSaveCopyAsXML                     FmpScriptStepType = 3
+	FmpScriptGoToNextField                     FmpScriptStepType = 4
+	FmpScriptGoToPreviousField                 FmpScriptStepType = 5
+	FmpScriptGoToLayout                        FmpScriptStepType = 6
+	FmpScriptNewRecordRequest                  FmpScriptStepType = 7
+	FmpScriptDuplicateRecordRequest            FmpScriptStepType = 8
+	FmpScriptDeleteRecordRequest               FmpScriptStepType = 9
+	FmpScriptDeleteAllRecords                  FmpScriptStepType = 10
+	FmpScriptInsertFromIndex                   FmpScriptStepType = 11
+	FmpScriptInsertFromLastVisited             FmpScriptStepType = 12
+	FmpScriptInsertCurrentDate                 FmpScriptStepType = 13
+	FmpScriptInsertCurrentTime                 FmpScriptStepType = 14
+	FmpScriptGoToRecordRequestPage             FmpScriptStepType = 16
+	FmpScriptGoToField                         FmpScriptStepType = 17
+	FmpScriptCheckSelection                    FmpScriptStepType = 18
+	FmpScriptCheckRecord                       FmpScriptStepType = 19
+	FmpScriptCheckFoundSet                     FmpScriptStepType = 20
+	FmpScriptUnsortRecords                     FmpScriptStepType = 21
+	FmpScriptEnterFindMode                     FmpScriptStepType = 22
+	FmpScriptShowAllRecords                    FmpScriptStepType = 23
+	FmpScriptModifyLastFind                    FmpScriptStepType = 24
+	FmpScriptOmitRecord                        FmpScriptStepType = 25
+	FmpScriptOmitMultipleRecords               FmpScriptStepType = 26
+	FmpScriptShowOmmitedOnly                   FmpScriptStepType = 27
+	FmpScriptPerformFind                       FmpScriptStepType = 28
+	FmpScriptShowHideToolbars                  FmpScriptStepType = 29
+	FmpScriptViewAs                            FmpScriptStepType = 30
+	FmpScriptAdjustWindow                      FmpScriptStepType = 31
+	FmpScriptOpenHelp                          FmpScriptStepType = 32
+	FmpScriptOpenFile                          FmpScriptStepType = 33
+	FmpScriptCloseFile                         FmpScriptStepType = 34
+	FmpScriptImportRecords                     FmpScriptStepType = 35
+	FmpScriptExportRecords                     FmpScriptStepType = 36
+	FmpScriptSaveACopyAs                       FmpScriptStepType = 37
+	FmpScriptOpenManageDatabase                FmpScriptStepType = 38
+	FmpScriptSortRecords                       FmpScriptStepType = 39
+	FmpScriptRelookupFieldContents             FmpScriptStepType = 40
+	FmpScriptEnterPreviewMode                  FmpScriptStepType = 41
+	FmpScriptPrintSetup                        FmpScriptStepType = 42
+	FmpScriptPrint                             FmpScriptStepType = 43
+	FmpScriptExitApplication                   FmpScriptStepType = 44
+	FmpScriptUndoRedo                          FmpScriptStepType = 45
+	FmpScriptCut                               FmpScriptStepType = 46
+	FmpScriptCopy                              FmpScriptStepType = 47
+	FmpScriptPaste                             FmpScriptStepType = 48
+	FmpScriptClear                             FmpScriptStepType = 49
+	FmpScriptSelectAll                         FmpScriptStepType = 50
+	FmpScriptRevertRecordRequest               FmpScriptStepType = 51
+	FmpScriptEnterBrowserMode                  FmpScriptStepType = 55
+	FmpScriptInsertPicture                     FmpScriptStepType = 56
+	FmpScriptSendEvent                         FmpScriptStepType = 57
+	FmpScriptInsertCurrentUserName             FmpScriptStepType = 60
+	FmpScriptInsertText                        FmpScriptStepType = 61
+	FmpScriptPauseResumeScript                 FmpScriptStepType = 62
+	FmpScriptSendMail                          FmpScriptStepType = 63
+	FmpScriptSendDDEExecute                    FmpScriptStepType = 64
+	FmpScriptDialPhone                         FmpScriptStepType = 65
+	FmpScriptSpeak                             FmpScriptStepType = 66
+	FmpScriptPerformApplescript                FmpScriptStepType = 67
+	FmpScriptIf                                FmpScriptStepType = 68
+	FmpScriptElse                              FmpScriptStepType = 69
+	FmpScriptEndIf                             FmpScriptStepType = 70
+	FmpScriptLoop                              FmpScriptStepType = 71
+	FmpScriptExitLoopIf                        FmpScriptStepType = 72
+	FmpScriptEndLoop                           FmpScriptStepType = 73
+	FmpScriptGoToRelatedRecord                 FmpScriptStepType = 74
+	FmpScriptCommitRecordsRequests             FmpScriptStepType = 75
+	FmpScriptSetField                          FmpScriptStepType = 76
+	FmpScriptInsertCalculatedResult            FmpScriptStepType = 77
+	FmpScriptFreezeWindow                      FmpScriptStepType = 79
+	FmpScriptRefreshWindow                     FmpScriptStepType = 80
+	FmpScriptScrollWindow                      FmpScriptStepType = 81
+	FmpScriptNewFile                           FmpScriptStepType = 82
+	FmpScriptChangePassword                    FmpScriptStepType = 83
+	FmpScriptSetMultiUser                      FmpScriptStepType = 84
+	FmpScriptAllowUserAbort                    FmpScriptStepType = 85
+	FmpScriptSetErrorCapture                   FmpScriptStepType = 86
+	FmpScriptShowCustomDialog                  FmpScriptStepType = 87
+	FmpScriptOpenScriptWorkspace               FmpScriptStepType = 88
+	FmpScriptBlankLineComment                  FmpScriptStepType = 89
+	FmpScriptHaltScript                        FmpScriptStepType = 90
+	FmpScriptReplaceFieldContents              FmpScriptStepType = 91
+	FmpScriptShowHideTextRuler                 FmpScriptStepType = 92
+	FmpScriptBeep                              FmpScriptStepType = 93
+	FmpScriptSetUseSystemFormats               FmpScriptStepType = 94
+	FmpScriptRecoverFile                       FmpScriptStepType = 95
+	FmpScriptSaveACopyAsAddOnPackage           FmpScriptStepType = 96
+	FmpScriptSetZoomLevel                      FmpScriptStepType = 97
+	FmpScriptCopyAllRecordsRequests            FmpScriptStepType = 98
+	FmpScriptGoToPortalRow                     FmpScriptStepType = 99
+	FmpScriptCopyRecordRequest                 FmpScriptStepType = 101
+	FmpScriptFluchCacheToDisk                  FmpScriptStepType = 102
+	FmpScriptExitScript                        FmpScriptStepType = 103
+	FmpScriptDeletePortalRow                   FmpScriptStepType = 104
+	FmpScriptOpenPreferences                   FmpScriptStepType = 105
+	FmpScriptCorrectWord                       FmpScriptStepType = 106
+	FmpScriptSpellingOptions                   FmpScriptStepType = 107
+	FmpScriptSelectDictionaries                FmpScriptStepType = 108
+	FmpScriptEditUserDictionary                FmpScriptStepType = 109
+	FmpScriptOpenUrl                           FmpScriptStepType = 111
+	FmpScriptOpenManageValueLists              FmpScriptStepType = 112
+	FmpScriptOpenSharing                       FmpScriptStepType = 113
+	FmpScriptOpenFileOptions                   FmpScriptStepType = 114
+	FmpScriptAllowFormattingBar                FmpScriptStepType = 115
+	FmpScriptSetNextSerialValue                FmpScriptStepType = 116
+	FmpScriptExecuteSQL                        FmpScriptStepType = 117
+	FmpScriptOpenHosts                         FmpScriptStepType = 118
+	FmpScriptMoveResizeWindow                  FmpScriptStepType = 119
+	FmpScriptArrangeAllWindows                 FmpScriptStepType = 120
+	FmpScriptCloseWindow                       FmpScriptStepType = 121
+	FmpScriptNewWindow                         FmpScriptStepType = 122
+	FmpScriptSelectWindow                      FmpScriptStepType = 123
+	FmpScriptSetWindowTitle                    FmpScriptStepType = 124
+	FmpScriptElseIf                            FmpScriptStepType = 125
+	FmpScriptConstrainFoundSet                 FmpScriptStepType = 126
+	FmpScriptExtendFoundSet                    FmpScriptStepType = 127
+	FmpScriptPerformFindReplace                FmpScriptStepType = 128
+	FmpScriptOpenFindReplace                   FmpScriptStepType = 129
+	FmpScriptSetSelection                      FmpScriptStepType = 130
+	FmpScriptInsertFile                        FmpScriptStepType = 131
+	FmpScriptExportFieldContents               FmpScriptStepType = 132
+	FmpScriptOpenRecordRequest                 FmpScriptStepType = 133
+	FmpScriptAddAccount                        FmpScriptStepType = 134
+	FmpScriptDeleteAccount                     FmpScriptStepType = 135
+	FmpScriptResetAccountPassword              FmpScriptStepType = 136
+	FmpScriptEnableAccount                     FmpScriptStepType = 137
+	FmpScriptRelogin                           FmpScriptStepType = 138
+	FmpScriptConvertFile                       FmpScriptStepType = 139
+	FmpScriptOpenManageDataSources             FmpScriptStepType = 140
+	FmpScriptSetVariable                       FmpScriptStepType = 141
+	FmpScriptInstallMenuSet                    FmpScriptStepType = 142
+	FmpScriptSaveRecordsAsExcel                FmpScriptStepType = 143
+	FmpScriptSaveRecordsAsPdf                  FmpScriptStepType = 144
+	FmpScriptGoToObject                        FmpScriptStepType = 145
+	FmpScriptSetWebViewer                      FmpScriptStepType = 146
+	FmpScriptSetFieldByName                    FmpScriptStepType = 147
+	FmpScriptInstallOntimerScript              FmpScriptStepType = 148
+	FmpScriptOpenEditSavedFinds                FmpScriptStepType = 149
+	FmpScriptPerformQuickFind                  FmpScriptStepType = 150
+	FmpScriptOpenManageLayouts                 FmpScriptStepType = 151
+	FmpScriptSaveRecordsAsSnapshotLink         FmpScriptStepType = 152
+	FmpScriptSortRecordsByField                FmpScriptStepType = 154
+	FmpScriptFindMatchingRecords               FmpScriptStepType = 155
+	FmpScriptManageContainers                  FmpScriptStepType = 156
+	FmpScriptInstallPluginFile                 FmpScriptStepType = 157
+	FmpScriptInsertPdf                         FmpScriptStepType = 158
+	FmpScriptInsertAudioVideo                  FmpScriptStepType = 159
+	FmpScriptInsertFromUrl                     FmpScriptStepType = 160
+	FmpScriptInsertFromDevice                  FmpScriptStepType = 161
+	FmpScriptPerformScriptOnServer             FmpScriptStepType = 164
+	FmpScriptOpenManageThemes                  FmpScriptStepType = 165
+	FmpScriptShowHideMenubar                   FmpScriptStepType = 166
+	FmpScriptRefreshObject                     FmpScriptStepType = 167
+	FmpScriptSetLayoutObjectAnimation          FmpScriptStepType = 168
+	FmpScriptClosePopover                      FmpScriptStepType = 169
+	FmpScriptOpenUploadToHost                  FmpScriptStepType = 172
+	FmpScriptEnableTouchKeyboard               FmpScriptStepType = 174
+	FmpScriptPerformJavascriptInWebViewer      FmpScriptStepType = 175
+	FmpScriptCommentedOut                      FmpScriptStepType = 176
+	FmpScriptAvplayerPlay                      FmpScriptStepType = 177
+	FmpScriptAvplayerSetPlaybackState          FmpScriptStepType = 178
+	FmpScriptAvplayerSetOptions                FmpScriptStepType = 179
+	FmpScriptRefreshPortal                     FmpScriptStepType = 180
+	FmpScriptGetFolderPath                     FmpScriptStepType = 181
+	FmpScriptTruncateTable                     FmpScriptStepType = 182
+	FmpScriptOpenFavorites                     FmpScriptStepType = 183
+	FmpScriptConfigureRegionMonitorScript      FmpScriptStepType = 185
+	FmpScriptConfigureLocalNotification        FmpScriptStepType = 187
+	FmpScriptGetFileExists                     FmpScriptStepType = 188
+	FmpScriptGetFileSize                       FmpScriptStepType = 189
+	FmpScriptCreateDataFile                    FmpScriptStepType = 190
+	FmpScriptOpenDataFile                      FmpScriptStepType = 191
+	FmpScriptWriteToDataFile                   FmpScriptStepType = 192
+	FmpScriptReadFromDataFile                  FmpScriptStepType = 193
+	FmpScriptGetDataFilePosition               FmpScriptStepType = 194
+	FmpScriptSetDataFilePosition               FmpScriptStepType = 195
+	FmpScriptCloseDataFile                     FmpScriptStepType = 196
+	FmpScriptDeleteFile                        FmpScriptStepType = 197
+	FmpScriptRenameFile                        FmpScriptStepType = 199
+	FmpScriptSetErrorLogging                   FmpScriptStepType = 200
+	FmpScriptConfigureNfcReading               FmpScriptStepType = 201
+	FmpScriptConfigureMachineLearningModel     FmpScriptStepType = 202
+	FmpScriptExecuteFileMakerDataAPI           FmpScriptStepType = 203
+	FmpScriptOpenTransaction                   FmpScriptStepType = 205
+	FmpScriptCommitTransaction                 FmpScriptStepType = 206
+	FmpScriptRevertTransaction                 FmpScriptStepType = 207
+	FmpScriptSetSessionIdentifier              FmpScriptStepType = 208
+	FmpScriptSetDictionary                     FmpScriptStepType = 209
+	FmpScriptPerformScriptOnServerWithCallback FmpScriptStepType = 210
+	FmpScriptTriggerClarisConnectFlow          FmpScriptStepType = 211
+	FmpScriptAssert                            FmpScriptStepType = 255
 )

fmp/fmp_debug.go

@@ -3,8 +3,35 @@ package fmp
 import (
 	"fmt"
 	"os"
+	"slices"
 )
 
+const debugging = false
+
+func debug(str string, args ...interface{}) {
+	if debugging {
+		fmt.Printf(str+"\n", args...)
+	}
+}
+
+func dump(data []byte) {
+	if debugging {
+		for _, b := range data {
+			fmt.Printf("%02x ", b)
+		}
+		fmt.Println()
+	}
+}
+
+func dumpPath(path []uint64) {
+	if debugging {
+		for _, p := range path {
+			fmt.Printf("%v. ", p)
+		}
+		fmt.Println()
+	}
+}
+
 func (f *FmpFile) ToDebugFile(fname string) {
 	f_sectors, err := os.Create(fname + ".sectors")
 	if err != nil {
@@ -54,7 +81,15 @@ func (c *FmpChunk) String() string {
 
 func (dict *FmpDict) string(parentPath string) string {
 	s := ""
-	for k, v := range *dict {
+	keys := make([]uint64, 0, len(*dict))
+
+	for k := range *dict {
+		keys = append(keys, k)
+	}
+	slices.Sort(keys)
+
+	for _, k := range keys {
+		v := (*dict)[k]
 		s += fmt.Sprintf("%v%v: %v\n", parentPath, k, string(v.Value))
 
 		if v.Children != nil {

fmp/fmp_dict.go

@@ -0,0 +1,58 @@
+package fmp
+
+type FmpDict map[uint64]*FmpDictEntry
+
+type FmpDictEntry struct {
+	Value    []byte
+	Children *FmpDict
+}
+
+func (dict *FmpDict) GetEntry(path ...uint64) *FmpDictEntry {
+	for i, key := range path {
+		_, ok := (*dict)[key]
+		if !ok {
+			return nil
+		}
+
+		if i == len(path)-1 {
+			return (*dict)[key]
+		} else {
+			dict = (*dict)[key].Children
+			if dict == nil {
+				return nil
+			}
+		}
+	}
+	return nil
+}
+
+func (dict *FmpDict) GetValue(path ...uint64) []byte {
+	ent := dict.GetEntry(path...)
+	if ent != nil {
+		return ent.Value
+	}
+	return nil
+}
+
+func (dict *FmpDict) GetChildren(path ...uint64) *FmpDict {
+	ent := dict.GetEntry(path...)
+	if ent != nil {
+		return ent.Children
+	}
+	return &FmpDict{}
+}
+
+func (dict *FmpDict) set(path []uint64, value []byte) {
+	for i, key := range path {
+		_, ok := (*dict)[key]
+		if !ok {
+			(*dict)[key] = &FmpDictEntry{Children: &FmpDict{}}
+		}
+
+		if i == len(path)-1 {
+			(*dict)[key].Value = value
+		} else {
+			dict = (*dict)[key].Children
+		}
+	}
+}

fmp/fmp_file.go

@@ -20,17 +20,31 @@ const (
 	hbamSize   = len(hbamSequence)
 )
 
+type FmpFile struct {
+	VersionDate time.Time
+	CreatorName string
+	FileSize    uint
+	Sectors     []*FmpSector
+	Chunks      []*FmpChunk
+	Dictionary  *FmpDict
+
+	tables          []*FmpTable
+	numSectors      uint64 // Excludes the header sector
+	currentSectorID uint64
+
+	stream *os.File
+}
+
 func OpenFile(path string) (*FmpFile, error) {
 	info, err := os.Stat(path)
 	if err != nil {
 		return nil, err
 	}
 
-	stream, err := os.Open(path)
+	stream, err := os.OpenFile(path, os.O_RDWR, 0)
 	if err != nil {
 		return nil, err
 	}
-	defer stream.Close()
 
 	ctx := &FmpFile{stream: stream, Dictionary: &FmpDict{}}
 	if err := ctx.readHeader(); err != nil {
@@ -40,7 +54,6 @@ func OpenFile(path string) (*FmpFile, error) {
 	ctx.FileSize = uint(info.Size())
 	ctx.numSectors = uint64((ctx.FileSize / sectorSize) - 1)
 	ctx.Sectors = make([]*FmpSector, 0)
-	currentPath := make([]uint64, 0)
 	ctx.stream.Seek(2*sectorSize, io.SeekStart)
 
 	for {
@@ -55,7 +68,7 @@ func OpenFile(path string) (*FmpFile, error) {
 		ctx.Sectors = append(ctx.Sectors, sector)
 
 		if sector.ID != 0 {
-			err = sector.processChunks(ctx.Dictionary, &currentPath)
+			err = sector.processChunks(ctx.Dictionary)
 			if err != nil {
 				return nil, err
 			}
@@ -72,9 +85,14 @@ func OpenFile(path string) (*FmpFile, error) {
 		}
 	}
 
+	ctx.readTables()
 	return ctx, nil
 }
 
+func (ctx *FmpFile) Close() {
+	ctx.stream.Close()
+}
+
 func (ctx *FmpFile) readHeader() error {
 	buf := make([]byte, headerSize)
 	_, err := ctx.stream.Read(buf)
@@ -100,7 +118,7 @@ func (ctx *FmpFile) readHeader() error {
 }
 
 func (ctx *FmpFile) readSector() (*FmpSector, error) {
-	println("---------- Reading sector", ctx.currentSectorID)
+	debug("---------- Reading sector %d", ctx.currentSectorID)
 	buf := make([]byte, sectorHeaderSize)
 	n, err := ctx.stream.Read(buf)
 
@@ -115,8 +133,8 @@ func (ctx *FmpFile) readSector() (*FmpSector, error) {
 		ID:      ctx.currentSectorID,
 		Deleted: buf[0] > 0,
 		Level:   uint8(buf[1]),
-		PrevID:  parseVarUint64(buf[4 : 4+4]),
-		NextID:  parseVarUint64(buf[8 : 8+4]),
+		PrevID:  decodeVarUint64(buf[4 : 4+4]),
+		NextID:  decodeVarUint64(buf[8 : 8+4]),
 		Chunks:  make([]*FmpChunk, 0),
 	}
 
@@ -135,3 +153,101 @@ func (ctx *FmpFile) readSector() (*FmpSector, error) {
 	}
 	return sector, nil
 }
+
+func (ctx *FmpFile) readTables() {
+	tables := make([]*FmpTable, 0)
+	ent := ctx.Dictionary.GetEntry(3, 16, 5)
+
+	for path, tableEnt := range *ent.Children {
+		if path < 128 {
+			continue
+		}
+
+		table := &FmpTable{
+			ID:      path,
+			Name:    decodeString(tableEnt.Children.GetValue(16)),
+			Columns: map[uint64]*FmpColumn{},
+			Records: map[uint64]*FmpRecord{},
+		}
+
+		tables = append(tables, table)
+
+		for colPath, colEnt := range *ctx.Dictionary.GetChildren(table.ID, 3, 5) {
+			name := decodeString(colEnt.Children.GetValue(16))
+			flags := colEnt.Children.GetValue(2)
+
+			column := &FmpColumn{
+				Index:       colPath,
+				Name:        name,
+				Type:        FmpFieldType(flags[0]),
+				DataType:    FmpDataType(flags[1]),
+				StorageType: FmpFieldStorageType(flags[9]),
+				Repetitions: flags[25],
+				Indexed:     flags[8] == 128,
+			}
+
+			if flags[11] == 1 {
+				column.AutoEnter = autoEnterPresetMap[flags[4]]
+			} else {
+				column.AutoEnter = autoEnterOptionMap[flags[11]]
+			}
+
+			table.Columns[column.Index] = column
+		}
+
+		for recPath, recEnt := range *ctx.Dictionary.GetChildren(table.ID, 5) {
+			record := &FmpRecord{Index: recPath, Values: make(map[uint64]string)}
+			table.Records[record.Index] = record
+
+			if recPath > table.lastRecordID {
+				table.lastRecordID = recPath
+			}
+
+			for colIndex, value := range *recEnt.Children {
+				record.Values[colIndex] = decodeString(value.Value)
+			}
+		}
+	}
+
+	ctx.tables = tables
+}
+
+func (ctx *FmpFile) NewSector() (*FmpSector, error) {
+	id := uint64(len(ctx.Sectors)) + 1
+	prevID := id - 2
+
+	ctx.Sectors[prevID].NextID = uint64(id)
+	_, err := ctx.stream.WriteAt(encodeUint(4, int(id)), int64((id-1)*sectorSize)+4)
+
+	if err != nil {
+		return nil, err
+	}
+
+	sector := &FmpSector{
+		ID:      uint64(id),
+		Deleted: false,
+		Level:   0,
+		PrevID:  prevID,
+		NextID:  0,
+		Chunks:  make([]*FmpChunk, 0),
+	}
+
+	ctx.Sectors = append(ctx.Sectors, sector)
+
+	sectorBuf := make([]byte, sectorSize)
+	sectorBuf[0] = 0 // deleted
+	sectorBuf[1] = 0 // level
+	writeToSlice(sectorBuf, 4, encodeUint(4, int(prevID))...)
+	writeToSlice(sectorBuf, 8, encodeUint(4, int(id))...)
+
+	_, err = ctx.stream.WriteAt(sectorBuf, int64((id+1)*sectorSize))
+	if err != nil {
+		return nil, err
+	}
+	return sector, nil
+}
+
+func (ctx *FmpFile) setValue(path []uint64, value []byte) {
+	// ctx.Dictionary.set(path, value)
+
+}

fmp/fmp_sector.go

@@ -1,10 +1,24 @@
 package fmp
 
-import (
-	"encoding/hex"
-	"fmt"
-	"io"
-)
+type FmpSector struct {
+	ID      uint64
+	Level   uint8
+	Deleted bool
+	PrevID  uint64
+	NextID  uint64
+	Prev    *FmpSector
+	Next    *FmpSector
+	Payload []byte
+	Chunks  []*FmpChunk
+}
+
+type FmpChunk struct {
+	Type   FmpChunkType
+	Length uint64
+	Key    uint64 // If Type == FMP_CHUNK_SHORT_KEY_VALUE or FMP_CHUNK_LONG_KEY_VALUE
+	Index  uint64 // Segment index, if Type == FMP_CHUNK_SEGMENTED_DATA
+	Value  []byte
+}
 
 func (sect *FmpSector) readChunks() error {
 	if len(sect.Chunks) > 0 {
@@ -19,22 +33,17 @@ func (sect *FmpSector) readChunks() error {
 
 		chunk, err := sect.readChunk(sect.Payload)
 		if chunk == nil {
-			fmt.Printf("0x%02x (pos %v, unknown)\n", sect.Payload[0], pos)
+			debug("0x%02x (pos %v, unknown)\n", sect.Payload[0], pos)
 		} else {
-			fmt.Printf("0x%02x (pos %v, type %v)\n", sect.Payload[0], pos, int(chunk.Type))
+			debug("0x%02x (pos %v, type %v)\n", sect.Payload[0], pos, int(chunk.Type))
 		}
 
-		if err == io.EOF {
-			println("break1")
-			break
-		}
 		if err != nil {
-			println(hex.EncodeToString(sect.Payload))
-			println("break2")
+			debug("chunk error at sector %d", sect.ID)
+			dump(sect.Payload)
 			return err
 		}
 		if chunk == nil {
-			println("break3")
 			break
 		}
 		if chunk.Length == 0 {
@@ -51,55 +60,49 @@ func (sect *FmpSector) readChunks() error {
 	return nil
 }
 
-func (sect *FmpSector) processChunks(dict *FmpDict, currentPath *[]uint64) error {
+func (sect *FmpSector) processChunks(dict *FmpDict) error {
 	err := sect.readChunks()
 	if err != nil {
 		return err
 	}
 
+	currentPath := make([]uint64, 0)
 	for _, chunk := range sect.Chunks {
 		switch chunk.Type {
-		case FMP_CHUNK_PATH_PUSH:
-			*currentPath = append(*currentPath, uint64(chunk.Value[0]))
+		case FmpChunkPathPush, FmpChunkPathPushLong:
+			currentPath = append(currentPath, decodeVarUint64(chunk.Value))
+			dumpPath(currentPath)
 
-		case FMP_CHUNK_PATH_POP:
-			if len(*currentPath) > 0 {
-				*currentPath = (*currentPath)[:len(*currentPath)-1]
+		case FmpChunkPathPop:
+			if len(currentPath) > 0 {
+				currentPath = (currentPath)[:len(currentPath)-1]
 			}
 
-		case FMP_CHUNK_SIMPLE_DATA:
-			dict.set(*currentPath, chunk.Value)
+		case FmpChunkSimpleData:
+			dict.set(currentPath, chunk.Value)
 
-		case FMP_CHUNK_SEGMENTED_DATA:
+		case FmpChunkSegmentedData:
 			// Todo: take index into account
 			dict.set(
-				*currentPath,
-				append(dict.getValue(*currentPath), chunk.Value...),
+				currentPath,
+				append(dict.GetValue(currentPath...), chunk.Value...),
 			)
 
-		case FMP_CHUNK_SIMPLE_KEY_VALUE:
+		case FmpChunkSimpleKeyValue:
 			dict.set(
-				append(*currentPath, uint64(chunk.Key)),
+				append(currentPath, uint64(chunk.Key)),
 				chunk.Value,
 			)
 
-		case FMP_CHUNK_LONG_KEY_VALUE:
+		case FmpChunkLongKeyValue:
 			dict.set(
-				append(*currentPath, uint64(chunk.Key)), // todo: ??
+				append(currentPath, uint64(chunk.Key)), // todo: ??
 				chunk.Value,
 			)
 
-		case FMP_CHUNK_NOOP:
+		case FmpChunkNoop:
 			// noop
 		}
-
-		if chunk.Delayed {
-			if len(*currentPath) == 0 {
-				println("warning: delayed pop without path")
-			} else {
-				*currentPath = (*currentPath)[:len(*currentPath)-1]
-			}
-		}
 	}
 	return nil
 }
@@ -112,182 +115,149 @@ func (sect *FmpSector) readChunk(payload []byte) (*FmpChunk, error) {
 	chunk := &FmpChunk{}
 	chunkCode := payload[0]
 
-	if (chunkCode & 0xC0) == 0xC0 {
-		chunkCode &= 0x3F
-		chunk.Delayed = true
-	}
-
 	switch chunkCode {
 	case 0x00:
 		chunk.Length = 2
-		chunk.Type = FMP_CHUNK_SIMPLE_DATA
+		chunk.Type = FmpChunkSimpleData
 		chunk.Value = payload[1:chunk.Length]
 
-	case 0x01:
-		chunk.Length = 3
-		chunk.Type = FMP_CHUNK_SIMPLE_KEY_VALUE
-		chunk.Key = uint64(payload[1])
-		chunk.Value = payload[2:chunk.Length]
-
-	case 0x02, 0x03, 0x04, 0x05:
-		valueLength := uint64(2 * (chunkCode - 1))
-		chunk.Length = 2 + valueLength
-		chunk.Type = FMP_CHUNK_SIMPLE_KEY_VALUE
+	case 0x01, 0x02, 0x03, 0x04, 0x05:
+		chunk.Length = 2 + 2*uint64(chunkCode-0x01) + addIf(chunkCode == 0x01, 1)
+		chunk.Type = FmpChunkSimpleKeyValue
 		chunk.Key = uint64(payload[1])
 		chunk.Value = payload[2:chunk.Length]
 
 	case 0x06:
-		valueLength := uint64(payload[2])
-		chunk.Length = 3 + valueLength
-		chunk.Type = FMP_CHUNK_SIMPLE_KEY_VALUE
+		chunk.Length = 3 + uint64(payload[2])
+		chunk.Type = FmpChunkSimpleKeyValue
 		chunk.Key = uint64(payload[1])
 		chunk.Value = payload[3:chunk.Length]
 
 	case 0x07:
-		valueLength := parseVarUint64(payload[2 : 2+2])
+		valueLength := decodeVarUint64(payload[2 : 2+2])
 		chunk.Length = min(4+valueLength, uint64(len(payload)))
-		chunk.Type = FMP_CHUNK_SEGMENTED_DATA
+		chunk.Type = FmpChunkSegmentedData
 		chunk.Index = uint64(payload[1])
 		chunk.Value = payload[4:chunk.Length]
 
 	case 0x08:
 		chunk.Length = 3
-		chunk.Type = FMP_CHUNK_SIMPLE_DATA
+		chunk.Type = FmpChunkSimpleData
 		chunk.Value = payload[1:chunk.Length]
 
 	case 0x09:
 		chunk.Length = 4
-		chunk.Type = FMP_CHUNK_SIMPLE_KEY_VALUE
-		chunk.Key = parseVarUint64(payload[1 : 1+2])
+		chunk.Type = FmpChunkSimpleKeyValue
+		chunk.Key = decodeVarUint64(payload[1 : 1+2])
 		chunk.Value = payload[3:chunk.Length]
 
 	case 0x0A, 0x0B, 0x0C, 0x0D:
-		valueLength := uint64(2 * (chunkCode - 0x09))
-		chunk.Length = 3 + valueLength
-		chunk.Type = FMP_CHUNK_SIMPLE_KEY_VALUE
-		chunk.Key = parseVarUint64(payload[1 : 1+2])
+		chunk.Length = 3 + 2*uint64(chunkCode-0x09)
+		chunk.Type = FmpChunkSimpleKeyValue
+		chunk.Key = decodeVarUint64(payload[1 : 1+2])
 		chunk.Value = payload[3:chunk.Length]
 
 	case 0x0E:
-		if payload[1] == 0xFE {
-			chunk.Length = 10
-			chunk.Type = FMP_CHUNK_PATH_PUSH
-			chunk.Value = payload[2:chunk.Length]
-			break
-		}
-
 		if payload[1] == 0xFF {
 			chunk.Length = 7
-			chunk.Type = FMP_CHUNK_SIMPLE_DATA
+			chunk.Type = FmpChunkSimpleData
 			chunk.Value = payload[2:chunk.Length]
 			break
 		}
 
-		valueLength := uint64(payload[2])
-		chunk.Length = 4 + valueLength
-		chunk.Type = FMP_CHUNK_SIMPLE_KEY_VALUE
-		chunk.Key = parseVarUint64(payload[1 : 1+2])
+		chunk.Length = 4 + uint64(payload[3])
+		chunk.Type = FmpChunkSimpleKeyValue
+		chunk.Key = decodeVarUint64(payload[1 : 1+2])
 		chunk.Value = payload[4:chunk.Length]
 
 	case 0x0F:
-		valueLength := parseVarUint64(payload[3 : 3+2])
-		chunk.Length = min(5+valueLength, uint64(len(payload)))
-		chunk.Type = FMP_CHUNK_SEGMENTED_DATA
-		chunk.Index = parseVarUint64(payload[1 : 1+2])
+		valueLength := decodeVarUint64(payload[3 : 3+2])
+		chunk.Length = uint64(len(payload))
+		if chunk.Length > 5+valueLength {
+			return nil, ErrBadChunk
+		}
+		chunk.Type = FmpChunkSegmentedData
+		chunk.Index = decodeVarUint64(payload[1 : 1+2])
 		chunk.Value = payload[5:chunk.Length]
 
 	case 0x10, 0x11:
-		valueLength := 3 + (uint64(chunkCode) - 0x10)
-		chunk.Length = 1 + valueLength
-		chunk.Type = FMP_CHUNK_SIMPLE_DATA
+		chunk.Length = 4 + addIf(chunkCode == 0x11, 1)
+		chunk.Type = FmpChunkSimpleData
 		chunk.Value = payload[1:chunk.Length]
 
 	case 0x12, 0x13, 0x14, 0x15:
-		valueLength := 1 + 2*(uint64(chunkCode)-0x10)
-		chunk.Length = 1 + valueLength
-		chunk.Type = FMP_CHUNK_SIMPLE_DATA
+		chunk.Length = 4 + 2*(uint64(chunkCode)-0x11)
+		chunk.Type = FmpChunkSimpleData
 		chunk.Value = payload[1:chunk.Length]
 
 	case 0x16:
-		valueLength := uint64(payload[4])
-		chunk.Type = FMP_CHUNK_LONG_KEY_VALUE
-		chunk.Length = 5 + valueLength
-		chunk.Key = parseVarUint64(payload[1 : 1+3])
+		chunk.Length = 5 + uint64(payload[4])
+		chunk.Type = FmpChunkLongKeyValue
+		chunk.Key = decodeVarUint64(payload[1 : 1+3])
 		chunk.Value = payload[5:chunk.Length]
 
 	case 0x17:
-		valueLength := parseVarUint64(payload[4 : 4+2])
-		chunk.Length = 6 + valueLength
-		chunk.Type = FMP_CHUNK_LONG_KEY_VALUE
-		chunk.Key = parseVarUint64(payload[1 : 1+3])
+		chunk.Length = 6 + decodeVarUint64(payload[4:4+2])
+		chunk.Type = FmpChunkLongKeyValue
+		chunk.Key = decodeVarUint64(payload[1 : 1+3])
 		chunk.Value = payload[6:chunk.Length]
 
-	case 0x19:
-		chunk.Type = FMP_CHUNK_SIMPLE_DATA
-		chunk.Length = 2
-		chunk.Value = payload[1:chunk.Length]
-
-	case 0x1A, 0x1B, 0x1C, 0x1D:
-		valueLength := 2 * uint64(chunkCode-0x19)
-		chunk.Length = 1 + valueLength
-		chunk.Type = FMP_CHUNK_SIMPLE_DATA
-		chunk.Value = payload[1:chunk.Length]
+	case 0x19, 0x1A, 0x1B, 0x1C, 0x1D:
+		valueLength := uint64(payload[1])
+		chunk.Length = 2 + valueLength + 2*uint64(chunkCode-0x19) + addIf(chunkCode == 0x19, 1)
+		chunk.Type = FmpChunkSimpleData
+		chunk.Value = payload[2 : 2+valueLength]
 
 	case 0x1E:
 		keyLength := uint64(payload[1])
 		valueLength := uint64(payload[2+keyLength])
 		chunk.Length = 2 + keyLength + 1 + valueLength
-		chunk.Type = FMP_CHUNK_LONG_KEY_VALUE
-		chunk.Key = parseVarUint64(payload[2 : 2+keyLength])
+		chunk.Type = FmpChunkLongKeyValue
+		chunk.Key = decodeVarUint64(payload[2 : 2+keyLength])
 		chunk.Value = payload[2+keyLength+1 : chunk.Length]
 
 	case 0x1F:
-		keyLength := uint64(uint64(payload[1]))
-		valueLength := parseVarUint64(payload[2+keyLength : 2+keyLength+2+1])
+		keyLength := uint64(payload[1])
+		valueLength := decodeVarUint64(payload[2+keyLength : 2+keyLength+2+1])
 		chunk.Length = 2 + keyLength + 2 + valueLength
-		chunk.Type = FMP_CHUNK_LONG_KEY_VALUE
-		chunk.Key = parseVarUint64(payload[2 : 2+keyLength])
+		chunk.Type = FmpChunkLongKeyValue
+		chunk.Key = decodeVarUint64(payload[2 : 2+keyLength])
 		chunk.Value = payload[2+keyLength+2 : chunk.Length]
 
-	case 0x20:
+	case 0x20, 0xE0:
 		if payload[1] == 0xFE {
 			chunk.Length = 10
-			chunk.Type = FMP_CHUNK_PATH_PUSH
-			chunk.Value = payload[1:chunk.Length]
+			chunk.Type = FmpChunkPathPush
+			chunk.Value = payload[2:chunk.Length]
 			break
 		}
 
 		chunk.Length = 2
-		chunk.Type = FMP_CHUNK_PATH_PUSH
+		chunk.Type = FmpChunkPathPush
 		chunk.Value = payload[1:chunk.Length]
 
 	case 0x23:
-		chunk.Length = 2
-		chunk.Type = FMP_CHUNK_SIMPLE_DATA
+		chunk.Length = 2 + uint64(payload[1])
+		chunk.Type = FmpChunkSimpleData
 		chunk.Value = payload[1:chunk.Length]
 
-	case 0x28:
-		chunk.Length = 3
-		chunk.Type = FMP_CHUNK_PATH_PUSH
-		chunk.Value = payload[1:chunk.Length]
-
-	case 0x30:
-		chunk.Length = 4
-		chunk.Type = FMP_CHUNK_PATH_PUSH
+	case 0x28, 0x30:
+		chunk.Length = 3 + addIf(chunkCode == 0x30, 1)
+		chunk.Type = FmpChunkPathPush
 		chunk.Value = payload[1:chunk.Length]
 
 	case 0x38:
 		valueLength := uint64(payload[1])
 		chunk.Length = 2 + valueLength
-		chunk.Type = FMP_CHUNK_PATH_PUSH
+		chunk.Type = FmpChunkPathPushLong
 		chunk.Value = payload[2:chunk.Length]
 
 	case 0x3D, 0x40:
-		chunk.Type = FMP_CHUNK_PATH_POP
+		chunk.Type = FmpChunkPathPop
 		chunk.Length = 1
 
 	case 0x80:
-		chunk.Type = FMP_CHUNK_NOOP
+		chunk.Type = FmpChunkNoop
 		chunk.Length = 1
 
 	default:

fmp/fmp_table.go

@@ -1,47 +1,63 @@
 package fmp
 
-func (ctx *FmpFile) Tables() []*FmpTable {
-	tables := make([]*FmpTable, 0)
+type FmpTable struct {
+	ID      uint64
+	Name    string
+	Columns map[uint64]*FmpColumn
+	Records map[uint64]*FmpRecord
 
-	for key, ent := range *ctx.Dictionary {
-		if key != 3 {
-			continue
-		}
-		println("Found a 3")
+	lastRecordID uint64
+}
 
-		for key, ent = range *ent.Children {
-			if key != 16 {
-				continue
-			}
-			println("Found a 3.16")
+type FmpColumn struct {
+	Index       uint64
+	Name        string
+	Type        FmpFieldType
+	DataType    FmpDataType
+	StorageType FmpFieldStorageType
+	AutoEnter   FmpAutoEnterOption
+	Repetitions uint8
+	Indexed     bool
+}
 
-			for key, ent = range *ent.Children {
-				if key != 5 {
-					continue
-				}
-				println("Found a 3.16.5")
+type FmpRecord struct {
+	Table  *FmpTable
+	Index  uint64
+	Values map[uint64]string
+}
 
-				for tablePath := range *ent.Children {
-					if key >= 128 {
-						continue
-					}
-
-					// Found a table!
-					println("Found a table at 3.16.5.", tablePath)
-				}
-			}
+func (ctx *FmpFile) Table(name string) *FmpTable {
+	for _, table := range ctx.tables {
+		if table.Name == name {
+			return table
 		}
 	}
-
-	// metaDict := ctx.Dictionary.get([]uint64{4, 1, 7})
-	// if metaDict == nil {
-	// 	return tables
-	// }
-	// for _, meta := range *metaDict.Children {
-	// 	name := decodeByteSeq(meta.Children.get([]uint64{16}).Value)
-	// 	table := &FmpTable{Name: name}
-	// 	tables = append(tables, table)
-	// }
-
-	return tables
+	return nil
+}
+
+func (t *FmpTable) Column(name string) *FmpColumn {
+	for _, column := range t.Columns {
+		if column.Name == name {
+			return column
+		}
+	}
+	return nil
+}
+
+func (t *FmpTable) NewRecord(values map[string]string) (*FmpRecord, error) {
+	vals := make(map[uint64]string)
+	for k, v := range values {
+		col := t.Column(k)
+		vals[col.Index] = v
+	}
+
+	id := t.lastRecordID + 1
+	t.lastRecordID = id
+	t.Records[id] = &FmpRecord{Table: t, Index: id, Values: vals}
+
+	return t.Records[id], nil
+}
+
+func (r *FmpRecord) Value(name string) string {
+	return r.Values[r.Table.Column(name).Index]
 }

fmp/fmp_test.go

@@ -1,17 +1,22 @@
 package fmp
 
-import "testing"
+import (
+	"slices"
+	"testing"
+)
 
 func TestOpenFile(t *testing.T) {
 	f, err := OpenFile("../files/Untitled.fmp12")
 	if err != nil {
 		t.Fatal(err)
 	}
-	if f.FileSize != 393216 {
-		t.Errorf("expected file size to be 393216, got %d", f.FileSize)
+	defer f.Close()
+
+	if f.FileSize != 229376 {
+		t.Errorf("expected file size to be 229376, got %d", f.FileSize)
 	}
-	if f.numSectors != 95 {
-		t.Errorf("expected number of sectors to be 95, got %d", f.numSectors)
+	if f.numSectors != 55 {
+		t.Errorf("expected number of sectors to be 55, got %d", f.numSectors)
 	}
 	if f.CreatorName != "Pro 12.0" {
 		t.Errorf("expected application name to be 'Pro 12.0', got '%s'", f.CreatorName)
@@ -19,6 +24,7 @@ func TestOpenFile(t *testing.T) {
 	if f.VersionDate.Format("2006-01-02") != "2025-01-11" {
 		t.Errorf("expected version date to be '2025-01-11', got '%s'", f.VersionDate.Format("2006-01-02"))
 	}
+
 	f.ToDebugFile("../private/output")
 }
 
@@ -27,16 +33,81 @@ func TestTables(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	tables := f.Tables()
+	defer f.Close()
 
-	if len(tables) != 1 || tables[0].Name != "Untitled" {
-		tablesString := ""
-		for i, table := range tables {
-			tablesString += table.Name
-			if i < len(tables)-1 {
-				tablesString += ", "
-			}
-		}
-		t.Errorf("expected tables to be 'Untitled', got '%s'", tablesString)
+	expectedNames := []string{"Untitled"}
+	tableNames := []string{}
+	for _, table := range f.tables {
+		tableNames = append(tableNames, table.Name)
+	}
+	if !slicesHaveSameElements(tableNames, expectedNames) {
+		t.Errorf("tables do not match")
+	}
+
+	table := f.Table("Untitled")
+	if table == nil {
+		t.Errorf("expected table to exist, but it does not")
+		return
+	}
+	if table.Name != "Untitled" {
+		t.Errorf("expected table name to be 'Untitled', but it is '%s'", table.Name)
+	}
+	if len(table.Records) != 3 {
+		t.Errorf("expected table to have 3 records, but it has %d", len(table.Records))
+	}
+	if table.Records[1].Values[1] != "629FAA83-50D8-401F-A560-C8D45217D17B" {
+		t.Errorf("first record has an incorrect ID '%s'", table.Records[0].Values[0])
+	}
+
+	col := table.Column("PrimaryKey")
+	if col == nil {
+		t.Errorf("expected column to exist, but it does not")
+		return
+	}
+	if col.Name != "PrimaryKey" {
+		t.Errorf("expected column name to be 'PrimaryKey', but it is '%s'", col.Name)
+	}
+	if col.Type != FmpFieldSimple {
+		t.Errorf("expected field type to be simple, but it is not")
+	}
+	if col.DataType != FmpDataText {
+		t.Errorf("expected field data type to be text, but it is not")
+	}
+	if col.StorageType != FmpFieldStorageRegular {
+		t.Errorf("expected field storage type to be regular, but it is not")
+	}
+	if col.Repetitions != 1 {
+		t.Errorf("expected field repetition count to be 1, but it is %d", col.Repetitions)
+	}
+	if !col.Indexed {
+		t.Errorf("expected field to be indexed, but it is not")
+	}
+	if col.AutoEnter != FmpAutoEnterCalculationReplacingExistingValue {
+		t.Errorf("expected field to have auto enter calculation replacing existing value, but it does not")
+	}
+
+	newRecord, err := table.NewRecord(map[string]string{"PrimaryKey": "629FAA83-50D8-401F-A560-C8D45217D17B"})
+	if newRecord == nil || err != nil {
+		t.Errorf("expected new record to be created, but it is nil")
+		return
+	}
+	if newRecord.Index != 4 {
+		t.Errorf("expected new record index to be 4, but it is %d", newRecord.Index)
+	}
+	if newRecord.Value("PrimaryKey") != "629FAA83-50D8-401F-A560-C8D45217D17B" {
+		t.Errorf("expected new record primary key to be '629FAA83-50D8-401F-A560-C8D45217D17B', but it is '%s'", newRecord.Value("PrimaryKey"))
 	}
 }
+
+func slicesHaveSameElements[Type comparable](a, b []Type) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for _, av := range a {
+		found := slices.Contains(b, av)
+		if !found {
+			return false
+		}
+	}
+	return true
+}

fmp/fmp_type.go

@@ -1,91 +0,0 @@
-package fmp
-
-import (
-	"io"
-	"time"
-)
-
-type FmpFile struct {
-	VersionDate time.Time
-	CreatorName string
-	FileSize    uint
-	Sectors     []*FmpSector
-	Chunks      []*FmpChunk
-	Dictionary  *FmpDict
-
-	numSectors      uint64 // Excludes the header sector
-	currentSectorID uint64
-
-	stream io.ReadSeeker
-}
-
-type FmpSector struct {
-	ID      uint64
-	Level   uint8
-	Deleted bool
-	PrevID  uint64
-	NextID  uint64
-	Prev    *FmpSector
-	Next    *FmpSector
-	Payload []byte
-	Chunks  []*FmpChunk
-}
-
-type FmpChunk struct {
-	Type    FmpChunkType
-	Length  uint64
-	Key     uint64 // If Type == FMP_CHUNK_SHORT_KEY_VALUE or FMP_CHUNK_LONG_KEY_VALUE
-	Index   uint64 // Segment index, if Type == FMP_CHUNK_SEGMENTED_DATA
-	Value   []byte
-	Delayed bool
-}
-
-type FmpDict map[uint64]*FmpDictEntry
-
-type FmpDictEntry struct {
-	Value    []byte
-	Children *FmpDict
-}
-
-type FmpTable struct {
-	Name string
-}
-
-func (dict *FmpDict) get(path []uint64) *FmpDictEntry {
-	for i, key := range path {
-		_, ok := (*dict)[key]
-		if !ok {
-			return nil
-		}
-
-		if i == len(path)-1 {
-			return (*dict)[key]
-		} else {
-			dict = (*dict)[key].Children
-		}
-	}
-	return nil
-}
-
-func (dict *FmpDict) getValue(path []uint64) []byte {
-	ent := dict.get(path)
-	if ent != nil {
-		return ent.Value
-	}
-	return nil
-}
-
-func (dict *FmpDict) set(path []uint64, value []byte) {
-	for i, key := range path {
-		_, ok := (*dict)[key]
-		if !ok {
-			(*dict)[key] = &FmpDictEntry{Children: &FmpDict{}}
-		}
-
-		if i == len(path)-1 {
-			(*dict)[key].Value = value
-		} else {
-			dict = (*dict)[key].Children
-		}
-	}
-}

fmp/fmp_util.go

@@ -1,6 +1,13 @@
 package fmp
 
-func parseVarUint64(payload []byte) uint64 {
+func addIf(cond bool, val uint64) uint64 {
+	if cond {
+		return val
+	}
+	return 0
+}
+
+func decodeVarUint64(payload []byte) uint64 {
 	var length uint64
 	n := min(len(payload), 8) // clamp to uint64
 	for i := range n {
@@ -10,10 +17,25 @@ func parseVarUint64(payload []byte) uint64 {
 	return length
 }
 
-func decodeByteSeq(payload []byte) string {
+func decodeString(payload []byte) string {
 	result := ""
 	for i := range payload {
 		result += string(payload[i] ^ 0x5A)
 	}
 	return result
 }
+
+func encodeUint(size uint, value int) []byte {
+	result := make([]byte, size)
+	for i := range size {
+		result[i] = byte(value & 0xFF)
+		value >>= 8
+	}
+	return result
+}
+
+func writeToSlice(slice []byte, start int, payload ...byte) {
+	for i := range payload {
+		slice[start+i] = payload[i]
+	}
+}