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a466821e8f
* Added divide operator (#49) * Tidy up divide operator logic * Added modulo operator * Fix divide test typo * Add divide by zero test * Handle int modulo by 0 and add tests * Tidy up divide/modulo operator node creation * Fix linter errors
79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
package yqlib
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import (
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"fmt"
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"strconv"
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"strings"
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yaml "gopkg.in/yaml.v3"
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)
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func divideOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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log.Debugf("Divide operator")
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return crossFunction(d, context.ReadOnlyClone(), expressionNode, divide, false)
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}
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func divide(d *dataTreeNavigator, context Context, lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
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lhs.Node = unwrapDoc(lhs.Node)
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rhs.Node = unwrapDoc(rhs.Node)
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lhsNode := lhs.Node
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if lhsNode.Tag == "!!null" {
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return nil, fmt.Errorf("%v (%v) cannot be divided by %v (%v)", lhsNode.Tag, lhs.GetNicePath(), rhs.Node.Tag, rhs.GetNicePath())
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}
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target := &yaml.Node{}
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if lhsNode.Kind == yaml.ScalarNode && rhs.Node.Kind == yaml.ScalarNode {
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if err := divideScalars(target, lhsNode, rhs.Node); err != nil {
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return nil, err
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}
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} else {
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return nil, fmt.Errorf("%v (%v) cannot be divided by %v (%v)", lhsNode.Tag, lhs.GetNicePath(), rhs.Node.Tag, rhs.GetNicePath())
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}
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return lhs.CreateReplacement(target), nil
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}
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func divideScalars(target *yaml.Node, lhs *yaml.Node, rhs *yaml.Node) error {
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lhsTag := lhs.Tag
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rhsTag := guessTagFromCustomType(rhs)
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lhsIsCustom := false
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if !strings.HasPrefix(lhsTag, "!!") {
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// custom tag - we have to have a guess
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lhsTag = guessTagFromCustomType(lhs)
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lhsIsCustom = true
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}
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if lhsTag == "!!str" && rhsTag == "!!str" {
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res := split(lhs.Value, rhs.Value)
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target.Kind = res.Kind
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target.Tag = res.Tag
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target.Content = res.Content
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} else if (lhsTag == "!!int" || lhsTag == "!!float") && (rhsTag == "!!int" || rhsTag == "!!float") {
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target.Kind = yaml.ScalarNode
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target.Style = lhs.Style
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lhsNum, err := strconv.ParseFloat(lhs.Value, 64)
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if err != nil {
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return err
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}
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rhsNum, err := strconv.ParseFloat(rhs.Value, 64)
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if err != nil {
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return err
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}
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quotient := lhsNum / rhsNum
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if lhsIsCustom {
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target.Tag = lhs.Tag
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} else {
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target.Tag = "!!float"
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}
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target.Value = fmt.Sprintf("%v", quotient)
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} else {
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return fmt.Errorf("%v cannot be divided by %v", lhsTag, rhsTag)
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}
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return nil
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}
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