Fix file corrupted in some cases, check file extension and format code

Fix file corrupted when save as in XLAM / XLSM / XLTM / XLTX extension in some case
New exported error ErrWorkbookExt has been added, and check file extension on save the workbook
Format source code with `gofumpt`

.gitignore

@@ -1,6 +1,9 @@
 ~$*.xlsx
-test/Test*.xlsx
+test/Test*.xlam
 test/Test*.xlsm
+test/Test*.xlsx
+test/Test*.xltm
+test/Test*.xltx
 # generated files
 test/BadEncrypt.xlsx
 test/BadWorkbook.SaveAsEmptyStruct.xlsx

README.md

@@ -13,7 +13,7 @@
 
 ## Introduction
 
-Excelize is a library written in pure Go providing a set of functions that allow you to write to and read from XLSX / XLSM / XLTM / XLTX files. Supports reading and writing spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports complex components by high compatibility, and provided streaming API for generating or reading data from a worksheet with huge amounts of data. This library needs Go version 1.15 or later. The full API docs can be seen using go's built-in documentation tool, or online at [go.dev](https://pkg.go.dev/github.com/xuri/excelize/v2) and [docs reference](https://xuri.me/excelize/).
+Excelize is a library written in pure Go providing a set of functions that allow you to write to and read from XLAM / XLSM / XLSX / XLTM / XLTX files. Supports reading and writing spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports complex components by high compatibility, and provided streaming API for generating or reading data from a worksheet with huge amounts of data. This library needs Go version 1.15 or later. The full API docs can be seen using go's built-in documentation tool, or online at [go.dev](https://pkg.go.dev/github.com/xuri/excelize/v2) and [docs reference](https://xuri.me/excelize/).
 
 ## Basic Usage
 

README_zh.md

@@ -13,7 +13,7 @@
 
 ## 简介
 
-Excelize 是 Go 语言编写的用于操作 Office Excel 文档基础库，基于 ECMA-376，ISO/IEC 29500 国际标准。可以使用它来读取、写入由 Microsoft Excel™ 2007 及以上版本创建的电子表格文档。支持 XLSX / XLSM / XLTM / XLTX 等多种文档格式，高度兼容带有样式、图片(表)、透视表、切片器等复杂组件的文档，并提供流式读写 API，用于处理包含大规模数据的工作簿。可应用于各类报表平台、云计算、边缘计算等系统。使用本类库要求使用的 Go 语言为 1.15 或更高版本，完整的 API 使用文档请访问 [go.dev](https://pkg.go.dev/github.com/xuri/excelize/v2) 或查看 [参考文档](https://xuri.me/excelize/)。
+Excelize 是 Go 语言编写的用于操作 Office Excel 文档基础库，基于 ECMA-376，ISO/IEC 29500 国际标准。可以使用它来读取、写入由 Microsoft Excel™ 2007 及以上版本创建的电子表格文档。支持 XLAM / XLSM / XLSX / XLTM / XLTX 等多种文档格式，高度兼容带有样式、图片(表)、透视表、切片器等复杂组件的文档，并提供流式读写 API，用于处理包含大规模数据的工作簿。可应用于各类报表平台、云计算、边缘计算等系统。使用本类库要求使用的 Go 语言为 1.15 或更高版本，完整的 API 使用文档请访问 [go.dev](https://pkg.go.dev/github.com/xuri/excelize/v2) 或查看 [参考文档](https://xuri.me/excelize/)。
 
 ## 快速上手
 

adjust_test.go

@@ -298,9 +298,11 @@ func TestAdjustHelper(t *testing.T) {
 	f := NewFile()
 	f.NewSheet("Sheet2")
 	f.Sheet.Store("xl/worksheets/sheet1.xml", &xlsxWorksheet{
-		MergeCells: &xlsxMergeCells{Cells: []*xlsxMergeCell{{Ref: "A:B1"}}}})
+		MergeCells: &xlsxMergeCells{Cells: []*xlsxMergeCell{{Ref: "A:B1"}}},
+	})
 	f.Sheet.Store("xl/worksheets/sheet2.xml", &xlsxWorksheet{
-		AutoFilter: &xlsxAutoFilter{Ref: "A1:B"}})
+		AutoFilter: &xlsxAutoFilter{Ref: "A1:B"},
+	})
 	// testing adjustHelper with illegal cell coordinates.
 	assert.EqualError(t, f.adjustHelper("Sheet1", rows, 0, 0), newCellNameToCoordinatesError("A", newInvalidCellNameError("A")).Error())
 	assert.EqualError(t, f.adjustHelper("Sheet2", rows, 0, 0), newCellNameToCoordinatesError("B", newInvalidCellNameError("B")).Error())

calc.go

@@ -1377,7 +1377,7 @@ func (f *File) rangeResolver(cellRefs, cellRanges *list.List) (arg formulaArg, e
 	if cellRanges.Len() > 0 {
 		arg.Type = ArgMatrix
 		for row := valueRange[0]; row <= valueRange[1]; row++ {
-			var matrixRow = []formulaArg{}
+			matrixRow := []formulaArg{}
 			for col := valueRange[2]; col <= valueRange[3]; col++ {
 				var cell, value string
 				if cell, err = CoordinatesToCellName(col, row); err != nil {
@@ -1473,7 +1473,7 @@ func formulaCriteriaParser(exp string) (fc *formulaCriteria) {
 func formulaCriteriaEval(val string, criteria *formulaCriteria) (result bool, err error) {
 	var value, expected float64
 	var e error
-	var prepareValue = func(val, cond string) (value float64, expected float64, err error) {
+	prepareValue := func(val, cond string) (value float64, expected float64, err error) {
 		if value, err = strconv.ParseFloat(val, 64); err != nil {
 			return
 		}
@@ -3385,7 +3385,7 @@ func (fn *formulaFuncs) DECIMAL(argsList *list.List) formulaArg {
 	if argsList.Len() != 2 {
 		return newErrorFormulaArg(formulaErrorVALUE, "DECIMAL requires 2 numeric arguments")
 	}
-	var text = argsList.Front().Value.(formulaArg).String
+	text := argsList.Front().Value.(formulaArg).String
 	var radix int
 	var err error
 	radix, err = strconv.Atoi(argsList.Back().Value.(formulaArg).String)
@@ -3934,7 +3934,7 @@ func (fn *formulaFuncs) MDETERM(argsList *list.List) (result formulaArg) {
 		return newErrorFormulaArg(formulaErrorVALUE, "MDETERM requires at least 1 argument")
 	}
 	strMtx = argsList.Front().Value.(formulaArg).Matrix
-	var rows = len(strMtx)
+	rows := len(strMtx)
 	for _, row := range argsList.Front().Value.(formulaArg).Matrix {
 		if len(row) != rows {
 			return newErrorFormulaArg(formulaErrorVALUE, formulaErrorVALUE)
@@ -4257,30 +4257,107 @@ type romanNumerals struct {
 
 var romanTable = [][]romanNumerals{
 	{
-		{1000, "M"}, {900, "CM"}, {500, "D"}, {400, "CD"}, {100, "C"}, {90, "XC"},
-		{50, "L"}, {40, "XL"}, {10, "X"}, {9, "IX"}, {5, "V"}, {4, "IV"}, {1, "I"},
+		{1000, "M"},
+		{900, "CM"},
+		{500, "D"},
+		{400, "CD"},
+		{100, "C"},
+		{90, "XC"},
+		{50, "L"},
+		{40, "XL"},
+		{10, "X"},
+		{9, "IX"},
+		{5, "V"},
+		{4, "IV"},
+		{1, "I"},
 	},
 	{
-		{1000, "M"}, {950, "LM"}, {900, "CM"}, {500, "D"}, {450, "LD"}, {400, "CD"},
-		{100, "C"}, {95, "VC"}, {90, "XC"}, {50, "L"}, {45, "VL"}, {40, "XL"},
-		{10, "X"}, {9, "IX"}, {5, "V"}, {4, "IV"}, {1, "I"},
+		{1000, "M"},
+		{950, "LM"},
+		{900, "CM"},
+		{500, "D"},
+		{450, "LD"},
+		{400, "CD"},
+		{100, "C"},
+		{95, "VC"},
+		{90, "XC"},
+		{50, "L"},
+		{45, "VL"},
+		{40, "XL"},
+		{10, "X"},
+		{9, "IX"},
+		{5, "V"},
+		{4, "IV"},
+		{1, "I"},
 	},
 	{
-		{1000, "M"}, {990, "XM"}, {950, "LM"}, {900, "CM"}, {500, "D"}, {490, "XD"},
-		{450, "LD"}, {400, "CD"}, {100, "C"}, {99, "IC"}, {90, "XC"}, {50, "L"},
-		{45, "VL"}, {40, "XL"}, {10, "X"}, {9, "IX"}, {5, "V"}, {4, "IV"}, {1, "I"},
+		{1000, "M"},
+		{990, "XM"},
+		{950, "LM"},
+		{900, "CM"},
+		{500, "D"},
+		{490, "XD"},
+		{450, "LD"},
+		{400, "CD"},
+		{100, "C"},
+		{99, "IC"},
+		{90, "XC"},
+		{50, "L"},
+		{45, "VL"},
+		{40, "XL"},
+		{10, "X"},
+		{9, "IX"},
+		{5, "V"},
+		{4, "IV"},
+		{1, "I"},
 	},
 	{
-		{1000, "M"}, {995, "VM"}, {990, "XM"}, {950, "LM"}, {900, "CM"}, {500, "D"},
-		{495, "VD"}, {490, "XD"}, {450, "LD"}, {400, "CD"}, {100, "C"}, {99, "IC"},
-		{90, "XC"}, {50, "L"}, {45, "VL"}, {40, "XL"}, {10, "X"}, {9, "IX"},
-		{5, "V"}, {4, "IV"}, {1, "I"},
+		{1000, "M"},
+		{995, "VM"},
+		{990, "XM"},
+		{950, "LM"},
+		{900, "CM"},
+		{500, "D"},
+		{495, "VD"},
+		{490, "XD"},
+		{450, "LD"},
+		{400, "CD"},
+		{100, "C"},
+		{99, "IC"},
+		{90, "XC"},
+		{50, "L"},
+		{45, "VL"},
+		{40, "XL"},
+		{10, "X"},
+		{9, "IX"},
+		{5, "V"},
+		{4, "IV"},
+		{1, "I"},
 	},
 	{
-		{1000, "M"}, {999, "IM"}, {995, "VM"}, {990, "XM"}, {950, "LM"}, {900, "CM"},
-		{500, "D"}, {499, "ID"}, {495, "VD"}, {490, "XD"}, {450, "LD"}, {400, "CD"},
-		{100, "C"}, {99, "IC"}, {90, "XC"}, {50, "L"}, {45, "VL"}, {40, "XL"},
-		{10, "X"}, {9, "IX"}, {5, "V"}, {4, "IV"}, {1, "I"},
+		{1000, "M"},
+		{999, "IM"},
+		{995, "VM"},
+		{990, "XM"},
+		{950, "LM"},
+		{900, "CM"},
+		{500, "D"},
+		{499, "ID"},
+		{495, "VD"},
+		{490, "XD"},
+		{450, "LD"},
+		{400, "CD"},
+		{100, "C"},
+		{99, "IC"},
+		{90, "XC"},
+		{50, "L"},
+		{45, "VL"},
+		{40, "XL"},
+		{10, "X"},
+		{9, "IX"},
+		{5, "V"},
+		{4, "IV"},
+		{1, "I"},
 	},
 }
 
@@ -4751,8 +4828,8 @@ func (fn *formulaFuncs) SUMIF(argsList *list.List) formulaArg {
 	if argsList.Len() < 2 {
 		return newErrorFormulaArg(formulaErrorVALUE, "SUMIF requires at least 2 arguments")
 	}
-	var criteria = formulaCriteriaParser(argsList.Front().Next().Value.(formulaArg).String)
-	var rangeMtx = argsList.Front().Value.(formulaArg).Matrix
+	criteria := formulaCriteriaParser(argsList.Front().Next().Value.(formulaArg).String)
+	rangeMtx := argsList.Front().Value.(formulaArg).Matrix
 	var sumRange [][]formulaArg
 	if argsList.Len() == 3 {
 		sumRange = argsList.Back().Value.(formulaArg).Matrix
@@ -5886,7 +5963,7 @@ func (fn *formulaFuncs) MEDIAN(argsList *list.List) formulaArg {
 	if argsList.Len() == 0 {
 		return newErrorFormulaArg(formulaErrorVALUE, "MEDIAN requires at least 1 argument")
 	}
-	var values = []float64{}
+	values := []float64{}
 	var median, digits float64
 	var err error
 	for token := argsList.Front(); token != nil; token = token.Next() {
@@ -9047,7 +9124,6 @@ func compareFormulaArg(lhs, rhs, matchMode formulaArg, caseSensitive bool) byte
 			if matchPattern(rs, ls) {
 				return criteriaEq
 			}
-
 		}
 		return map[int]byte{1: criteriaG, -1: criteriaL, 0: criteriaEq}[strings.Compare(ls, rs)]
 	case ArgEmpty:
@@ -9931,9 +10007,8 @@ func (fn *formulaFuncs) ACCRINT(argsList *list.List) formulaArg {
 			return newErrorFormulaArg(formulaErrorNUM, formulaErrorNUM)
 		}
 	}
-	cm := newBoolFormulaArg(true)
 	if argsList.Len() == 8 {
-		if cm = argsList.Back().Value.(formulaArg).ToBool(); cm.Type != ArgNumber {
+		if cm := argsList.Back().Value.(formulaArg).ToBool(); cm.Type != ArgNumber {
 			return newErrorFormulaArg(formulaErrorVALUE, formulaErrorVALUE)
 		}
 	}
@@ -10206,10 +10281,8 @@ func coupdays(from, to time.Time, basis int) float64 {
 			date = date.AddDate(0, 13-int(date.Month()), 0)
 		}
 		days += getDaysInMonthRange(toY, int(date.Month()), int(toM)-1, basis)
-		date = date.AddDate(0, int(toM)-int(date.Month()), 0)
 	}
-	days += toDay - fromDay
-	if days > 0 {
+	if days += toDay - fromDay; days > 0 {
 		return float64(days)
 	}
 	return 0
@@ -11375,8 +11448,7 @@ func (fn *formulaFuncs) ODDFPRICE(argsList *list.List) formulaArg {
 	if args.Type != ArgList {
 		return args
 	}
-	settlement, maturity, issue, firstCoupon, rate, yld, redemption, frequency, basisArg :=
-		args.List[0], args.List[1], args.List[2], args.List[3], args.List[4], args.List[5], args.List[6], args.List[7], args.List[8]
+	settlement, maturity, issue, firstCoupon, rate, yld, redemption, frequency, basisArg := args.List[0], args.List[1], args.List[2], args.List[3], args.List[4], args.List[5], args.List[6], args.List[7], args.List[8]
 	if basisArg.Number < 0 || basisArg.Number > 4 {
 		return newErrorFormulaArg(formulaErrorNUM, "invalid basis")
 	}

calc_test.go

@@ -3386,7 +3386,6 @@ func TestCalcCellValue(t *testing.T) {
 	_, err = f.CalcCellValue("Sheet1", "A1")
 	assert.EqualError(t, err, "not support UNSUPPORT function")
 	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestCalcCellValue.xlsx")))
-
 }
 
 func TestCalculate(t *testing.T) {
@@ -3438,7 +3437,6 @@ func TestCalcWithDefinedName(t *testing.T) {
 	result, err = f.CalcCellValue("Sheet1", "D1")
 	assert.NoError(t, err)
 	assert.Equal(t, "YES", result, `=IF("B1_as_string"=defined_name1,"YES","NO")`)
-
 }
 
 func TestCalcISBLANK(t *testing.T) {
@@ -3748,7 +3746,8 @@ func TestCalcXIRR(t *testing.T) {
 		{25.00, "02/01/2017"},
 		{8.00, "03/01/2017"},
 		{15.00, "06/01/2017"},
-		{-1e-10, "09/01/2017"}}
+		{-1e-10, "09/01/2017"},
+	}
 	f := prepareCalcData(cellData)
 	formulaList := map[string]string{
 		"=XIRR(A1:A4,B1:B4)":     "-0.196743861298328",
@@ -3886,7 +3885,8 @@ func TestCalcXLOOKUP(t *testing.T) {
 }
 
 func TestCalcXNPV(t *testing.T) {
-	cellData := [][]interface{}{{nil, 0.05},
+	cellData := [][]interface{}{
+		{nil, 0.05},
 		{"01/01/2016", -10000, nil},
 		{"02/01/2016", 2000},
 		{"05/01/2016", 2400},
@@ -3895,7 +3895,8 @@ func TestCalcXNPV(t *testing.T) {
 		{"01/01/2017", 4100},
 		{},
 		{"02/01/2016"},
-		{"01/01/2016"}}
+		{"01/01/2016"},
+	}
 	f := prepareCalcData(cellData)
 	formulaList := map[string]string{
 		"=XNPV(B1,B2:B7,A2:A7)": "4447.938009440515",

cell_test.go

@@ -30,11 +30,13 @@ func TestConcurrency(t *testing.T) {
 			_, err := f.GetCellValue("Sheet1", fmt.Sprintf("A%d", val))
 			assert.NoError(t, err)
 			// Concurrency set rows
-			assert.NoError(t, f.SetSheetRow("Sheet1", "B6", &[]interface{}{" Hello",
+			assert.NoError(t, f.SetSheetRow("Sheet1", "B6", &[]interface{}{
+				" Hello",
 				[]byte("World"), 42, int8(1<<8/2 - 1), int16(1<<16/2 - 1), int32(1<<32/2 - 1),
 				int64(1<<32/2 - 1), float32(42.65418), float64(-42.65418), float32(42), float64(42),
 				uint(1<<32 - 1), uint8(1<<8 - 1), uint16(1<<16 - 1), uint32(1<<32 - 1),
-				uint64(1<<32 - 1), true, complex64(5 + 10i)}))
+				uint64(1<<32 - 1), true, complex64(5 + 10i),
+			}))
 			// Concurrency create style
 			style, err := f.NewStyle(`{"font":{"color":"#1265BE","underline":"single"}}`)
 			assert.NoError(t, err)
@@ -384,7 +386,7 @@ func TestGetCellFormula(t *testing.T) {
 
 func ExampleFile_SetCellFloat() {
 	f := NewFile()
-	var x = 3.14159265
+	x := 3.14159265
 	if err := f.SetCellFloat("Sheet1", "A1", x, 2, 64); err != nil {
 		fmt.Println(err)
 	}
@@ -534,6 +536,7 @@ func TestGetCellRichText(t *testing.T) {
 	_, err = f.GetCellRichText("Sheet1", "A")
 	assert.EqualError(t, err, newCellNameToCoordinatesError("A", newInvalidCellNameError("A")).Error())
 }
+
 func TestSetCellRichText(t *testing.T) {
 	f := NewFile()
 	assert.NoError(t, f.SetRowHeight("Sheet1", 1, 35))

comment.go

@@ -74,7 +74,7 @@ func (f *File) GetComments() (comments map[string][]Comment) {
 // getSheetComments provides the method to get the target comment reference by
 // given worksheet file path.
 func (f *File) getSheetComments(sheetFile string) string {
-	var rels = "xl/worksheets/_rels/" + sheetFile + ".rels"
+	rels := "xl/worksheets/_rels/" + sheetFile + ".rels"
 	if sheetRels := f.relsReader(rels); sheetRels != nil {
 		sheetRels.Lock()
 		defer sheetRels.Unlock()