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- formula engine: reduce cyclomatic complexity

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- styles: allow empty and default cell formats, #628
formula
xuri 6 years ago
parent 4188dc7a4a
commit 882abb8098
No known key found for this signature in database
GPG Key ID: BA5E5BB1C948EDF7
8 changed files with 206 additions and 154 deletions
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303
calc.go
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@ -63,8 +63,8 @@ type formulaArg struct {
type formulaFuncs struct{}
// CalcCellValue provides a function to get calculated cell value. This
// feature is currently in beta. Array formula, table formula and some other
// formulas are not supported currently.
// feature is currently in working processing. Array formula, table formula
// and some other formulas are not supported currently.
func (f *File) CalcCellValue(sheet, cell string) (result string, err error) {
var (
formula string
@ -265,6 +265,89 @@ func (f *File) evalInfixExp(sheet string, tokens []efp.Token) (efp.Token, error)
return opdStack.Peek().(efp.Token), err
}
// calcAdd evaluate addition arithmetic operations.
func calcAdd(opdStack *Stack) error {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal + rOpdVal
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
return nil
}
// calcAdd evaluate subtraction arithmetic operations.
func calcSubtract(opdStack *Stack) error {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal - rOpdVal
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
return nil
}
// calcAdd evaluate multiplication arithmetic operations.
func calcMultiply(opdStack *Stack) error {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal * rOpdVal
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
return nil
}
// calcAdd evaluate division arithmetic operations.
func calcDivide(opdStack *Stack) error {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal / rOpdVal
if rOpdVal == 0 {
return errors.New(formulaErrorDIV)
}
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
return nil
}
// calculate evaluate basic arithmetic operations.
func calculate(opdStack *Stack, opt efp.Token) error {
if opt.TValue == "-" && opt.TType == efp.TokenTypeOperatorPrefix {
@ -279,80 +362,69 @@ func calculate(opdStack *Stack, opt efp.Token) error {
result := 0 - opdVal
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
}
if opt.TValue == "+" {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
if err := calcAdd(opdStack); err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal + rOpdVal
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
}
if opt.TValue == "-" && opt.TType == efp.TokenTypeOperatorInfix {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
if err := calcSubtract(opdStack); err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal - rOpdVal
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
}
if opt.TValue == "*" {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
if err := calcMultiply(opdStack); err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal * rOpdVal
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
}
if opt.TValue == "/" {
if opdStack.Len() < 2 {
return errors.New("formula not valid")
}
rOpd := opdStack.Pop().(efp.Token)
lOpd := opdStack.Pop().(efp.Token)
lOpdVal, err := strconv.ParseFloat(lOpd.TValue, 64)
if err != nil {
if err := calcDivide(opdStack); err != nil {
return err
}
rOpdVal, err := strconv.ParseFloat(rOpd.TValue, 64)
if err != nil {
return err
}
result := lOpdVal / rOpdVal
if rOpdVal == 0 {
return errors.New(formulaErrorDIV)
}
opdStack.Push(efp.Token{TValue: fmt.Sprintf("%g", result), TType: efp.TokenTypeOperand, TSubType: efp.TokenSubTypeNumber})
}
return nil
}
// parseOperatorPrefixToken parse operator prefix token.
func (f *File) parseOperatorPrefixToken(optStack, opdStack *Stack, token efp.Token) (err error) {
if optStack.Len() == 0 {
optStack.Push(token)
} else {
tokenPriority := getPriority(token)
topOpt := optStack.Peek().(efp.Token)
topOptPriority := getPriority(topOpt)
if tokenPriority > topOptPriority {
optStack.Push(token)
} else {
for tokenPriority <= topOptPriority {
optStack.Pop()
if err = calculate(opdStack, topOpt); err != nil {
return
}
if optStack.Len() > 0 {
topOpt = optStack.Peek().(efp.Token)
topOptPriority = getPriority(topOpt)
continue
}
break
}
optStack.Push(token)
}
}
return
}
// isOperatorPrefixToken determine if the token is parse operator prefix
// token.
func isOperatorPrefixToken(token efp.Token) bool {
if (token.TValue == "-" && token.TType == efp.TokenTypeOperatorPrefix) ||
token.TValue == "+" || token.TValue == "-" || token.TValue == "*" || token.TValue == "/" {
return true
}
return false
}
// parseToken parse basic arithmetic operator priority and evaluate based on
// operators and operands.
func (f *File) parseToken(sheet string, token efp.Token, opdStack, optStack *Stack) error {
@ -369,30 +441,9 @@ func (f *File) parseToken(sheet string, token efp.Token, opdStack, optStack *Sta
token.TType = efp.TokenTypeOperand
token.TSubType = efp.TokenSubTypeNumber
}
if (token.TValue == "-" && token.TType == efp.TokenTypeOperatorPrefix) || token.TValue == "+" || token.TValue == "-" || token.TValue == "*" || token.TValue == "/" {
if optStack.Len() == 0 {
optStack.Push(token)
} else {
tokenPriority := getPriority(token)
topOpt := optStack.Peek().(efp.Token)
topOptPriority := getPriority(topOpt)
if tokenPriority > topOptPriority {
optStack.Push(token)
} else {
for tokenPriority <= topOptPriority {
optStack.Pop()
if err := calculate(opdStack, topOpt); err != nil {
return err
}
if optStack.Len() > 0 {
topOpt = optStack.Peek().(efp.Token)
topOptPriority = getPriority(topOpt)
continue
}
break
}
optStack.Push(token)
}
if isOperatorPrefixToken(token) {
if err := f.parseOperatorPrefixToken(optStack, opdStack, token); err != nil {
return err
}
}
if token.TType == efp.TokenTypeSubexpression && token.TSubType == efp.TokenSubTypeStart { // (
@ -461,11 +512,44 @@ func (f *File) parseReference(sheet, reference string) (result []string, matrix
return
}
// prepareValueRange prepare value range.
func prepareValueRange(cr cellRange, valueRange []int) {
if cr.From.Row < valueRange[0] {
valueRange[0] = cr.From.Row
}
if cr.From.Col < valueRange[2] {
valueRange[2] = cr.From.Col
}
if cr.To.Row > valueRange[0] {
valueRange[1] = cr.To.Row
}
if cr.To.Col > valueRange[3] {
valueRange[3] = cr.To.Col
}
}
// prepareValueRef prepare value reference.
func prepareValueRef(cr cellRef, valueRange []int) {
if cr.Row < valueRange[0] {
valueRange[0] = cr.Row
}
if cr.Col < valueRange[2] {
valueRange[2] = cr.Col
}
if cr.Row > valueRange[0] {
valueRange[1] = cr.Row
}
if cr.Col > valueRange[3] {
valueRange[3] = cr.Col
}
}
// rangeResolver extract value as string from given reference and range list.
// This function will not ignore the empty cell. For example,
// A1:A2:A2:B3 will be reference A1:B3.
// This function will not ignore the empty cell. For example, A1:A2:A2:B3 will
// be reference A1:B3.
func (f *File) rangeResolver(cellRefs, cellRanges *list.List) (result []string, matrix [][]string, err error) {
var fromRow, toRow, fromCol, toCol int = 1, 1, 1, 1
// value range order: from row, to row, from column, to column
valueRange := []int{1, 1, 1, 1}
var sheet string
filter := map[string]string{}
// prepare value range
@ -476,18 +560,7 @@ func (f *File) rangeResolver(cellRefs, cellRanges *list.List) (result []string,
}
rng := []int{cr.From.Col, cr.From.Row, cr.To.Col, cr.To.Row}
sortCoordinates(rng)
if cr.From.Row < fromRow {
fromRow = cr.From.Row
}
if cr.From.Col < fromCol {
fromCol = cr.From.Col
}
if cr.To.Row > fromRow {
toRow = cr.To.Row
}
if cr.To.Col > toCol {
toCol = cr.To.Col
}
prepareValueRange(cr, valueRange)
if cr.From.Sheet != "" {
sheet = cr.From.Sheet
}
@ -497,24 +570,13 @@ func (f *File) rangeResolver(cellRefs, cellRanges *list.List) (result []string,
if cr.Sheet != "" {
sheet = cr.Sheet
}
if cr.Row < fromRow {
fromRow = cr.Row
}
if cr.Col < fromCol {
fromCol = cr.Col
}
if cr.Row > fromRow {
toRow = cr.Row
}
if cr.Col > toCol {
toCol = cr.Col
}
prepareValueRef(cr, valueRange)
}
// extract value from ranges
if cellRanges.Len() > 0 {
for row := fromRow; row <= toRow; row++ {
for row := valueRange[0]; row <= valueRange[1]; row++ {
var matrixRow = []string{}
for col := fromCol; col <= toCol; col++ {
for col := valueRange[2]; col <= valueRange[3]; col++ {
var cell, value string
if cell, err = CoordinatesToCellName(col, row); err != nil {
return
@ -672,28 +734,15 @@ func (fn *formulaFuncs) ARABIC(argsList *list.List) (result string, err error) {
err = errors.New("ARABIC requires 1 numeric argument")
return
}
charMap := map[rune]float64{'I': 1, 'V': 5, 'X': 10, 'L': 50, 'C': 100, 'D': 500, 'M': 1000}
val, last, prefix := 0.0, 0.0, 1.0
for _, char := range argsList.Front().Value.(formulaArg).Value {
digit := 0.0
switch char {
case '-':
if char == '-' {
prefix = -1
continue
case 'I':
digit = 1
case 'V':
digit = 5
case 'X':
digit = 10
case 'L':
digit = 50
case 'C':
digit = 100
case 'D':
digit = 500
case 'M':
digit = 1000
}
digit, _ = charMap[char]
val += digit
switch {
case last == digit && (last == 5 || last == 50 || last == 500):
@ -850,7 +899,7 @@ func (fn *formulaFuncs) BASE(argsList *list.List) (result string, err error) {
return
}
if radix < 2 || radix > 36 {
err = errors.New("radix must be an integer ≥ 2 and ≤ 36")
err = errors.New("radix must be an integer >= 2 and <= 36")
return
}
if argsList.Len() > 2 {

2
calc_test.go
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@ -381,7 +381,7 @@ func TestCalcCellValue(t *testing.T) {
// BASE
"=BASE()": "BASE requires at least 2 arguments",
"=BASE(1,2,3,4)": "BASE allows at most 3 arguments",
"=BASE(1,1)": "radix must be an integer ≥ 2 and ≤ 36",
"=BASE(1,1)": "radix must be an integer >= 2 and <= 36",
// CEILING
"=CEILING()": "CEILING requires at least 1 argument",
"=CEILING(1,2,3)": "CEILING allows at most 2 arguments",

4
cell.go
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@ -730,9 +730,9 @@ func (f *File) formattedValue(s int, v string) string {
return v
}
styleSheet := f.stylesReader()
ok := builtInNumFmtFunc[styleSheet.CellXfs.Xf[s].NumFmtID]
ok := builtInNumFmtFunc[*styleSheet.CellXfs.Xf[s].NumFmtID]
if ok != nil {
return ok(styleSheet.CellXfs.Xf[s].NumFmtID, v)
return ok(*styleSheet.CellXfs.Xf[s].NumFmtID, v)
}
return v
}

1
go.mod
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@ -6,6 +6,7 @@ require (
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
github.com/stretchr/testify v1.3.0
github.com/xuri/efp v0.0.0-20191019043341-b7dc4fe9aa91
golang.org/x/image v0.0.0-20190910094157-69e4b8554b2a
golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553
golang.org/x/text v0.3.2 // indirect

2
go.sum
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@ -9,6 +9,8 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/xuri/efp v0.0.0-20191019043341-b7dc4fe9aa91 h1:gp02YctZuIPTk0t7qI+wvg3VQwTPyNmSGG6ZqOsjSL8=
github.com/xuri/efp v0.0.0-20191019043341-b7dc4fe9aa91/go.mod h1:uBiSUepVYMhGTfDeBKKasV4GpgBlzJ46gXUBAqV8qLk=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/image v0.0.0-20190910094157-69e4b8554b2a h1:gHevYm0pO4QUbwy8Dmdr01R5r1BuKtfYqRqF0h/Cbh0=
golang.org/x/image v0.0.0-20190910094157-69e4b8554b2a/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=

16
styles.go
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@ -2299,21 +2299,21 @@ func setBorders(style *Style) *xlsxBorder {
// cell.
func setCellXfs(style *xlsxStyleSheet, fontID, numFmtID, fillID, borderID int, applyAlignment, applyProtection bool, alignment *xlsxAlignment, protection *xlsxProtection) int {
var xf xlsxXf
xf.FontID = fontID
xf.FontID = intPtr(fontID)
if fontID != 0 {
xf.ApplyFont = true
xf.ApplyFont = boolPtr(true)
}
xf.NumFmtID = numFmtID
xf.NumFmtID = intPtr(numFmtID)
if numFmtID != 0 {
xf.ApplyNumberFormat = true
xf.ApplyNumberFormat = boolPtr(true)
}
xf.FillID = fillID
xf.BorderID = borderID
xf.FillID = intPtr(fillID)
xf.BorderID = intPtr(borderID)
style.CellXfs.Count++
xf.Alignment = alignment
xf.ApplyAlignment = applyAlignment
xf.ApplyAlignment = boolPtr(applyAlignment)
if applyProtection {
xf.ApplyProtection = applyProtection
xf.ApplyProtection = boolPtr(applyProtection)
xf.Protection = protection
}
xfID := 0

6
styles_test.go
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@ -33,9 +33,9 @@ func TestStyleFill(t *testing.T) {
styles := xl.stylesReader()
style := styles.CellXfs.Xf[styleID]
if testCase.expectFill {
assert.NotEqual(t, style.FillID, 0, testCase.label)
assert.NotEqual(t, *style.FillID, 0, testCase.label)
} else {
assert.Equal(t, style.FillID, 0, testCase.label)
assert.Equal(t, *style.FillID, 0, testCase.label)
}
}
}
@ -188,7 +188,7 @@ func TestNewStyle(t *testing.T) {
assert.NoError(t, err)
styles := f.stylesReader()
fontID := styles.CellXfs.Xf[styleID].FontID
font := styles.Fonts.Font[fontID]
font := styles.Fonts.Font[*fontID]
assert.Contains(t, *font.Name.Val, "Times New Roman", "Stored font should contain font name")
assert.Equal(t, 2, styles.CellXfs.Count, "Should have 2 styles")
_, err = f.NewStyle(&Style{})

26
xmlStyles.go
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@ -209,19 +209,19 @@ type xlsxCellStyleXfs struct {
// xlsxXf directly maps the xf element. A single xf element describes all of the
// formatting for a cell.
type xlsxXf struct {
NumFmtID int `xml:"numFmtId,attr,omitempty"`
FontID int `xml:"fontId,attr,omitempty"`
FillID int `xml:"fillId,attr,omitempty"`
BorderID int `xml:"borderId,attr,omitempty"`
XfID *int `xml:"xfId,attr,omitempty"`
QuotePrefix bool `xml:"quotePrefix,attr,omitempty"`
PivotButton bool `xml:"pivotButton,attr,omitempty"`
ApplyNumberFormat bool `xml:"applyNumberFormat,attr,omitempty"`
ApplyFont bool `xml:"applyFont,attr,omitempty"`
ApplyFill bool `xml:"applyFill,attr,omitempty"`
ApplyBorder bool `xml:"applyBorder,attr,omitempty"`
ApplyAlignment bool `xml:"applyAlignment,attr,omitempty"`
ApplyProtection bool `xml:"applyProtection,attr,omitempty"`
NumFmtID *int `xml:"numFmtId,attr"`
FontID *int `xml:"fontId,attr"`
FillID *int `xml:"fillId,attr"`
BorderID *int `xml:"borderId,attr"`
XfID *int `xml:"xfId,attr"`
QuotePrefix *bool `xml:"quotePrefix,attr"`
PivotButton *bool `xml:"pivotButton,attr"`
ApplyNumberFormat *bool `xml:"applyNumberFormat,attr"`
ApplyFont *bool `xml:"applyFont,attr"`
ApplyFill *bool `xml:"applyFill,attr"`
ApplyBorder *bool `xml:"applyBorder,attr"`
ApplyAlignment *bool `xml:"applyAlignment,attr"`
ApplyProtection *bool `xml:"applyProtection,attr"`
Alignment *xlsxAlignment `xml:"alignment"`
Protection *xlsxProtection `xml:"protection"`
}

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