mirror of
https://github.com/MontFerret/ferret.git
synced 2024-12-23 01:24:30 +02:00
105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
package strings
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import (
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"context"
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"strings"
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"github.com/MontFerret/ferret/pkg/runtime/core"
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"github.com/MontFerret/ferret/pkg/runtime/values"
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"github.com/MontFerret/ferret/pkg/runtime/values/types"
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)
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// FindFirst returns the position of the first occurrence of the string search inside the string text. Positions start at 0.
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// @param src (String) - The source string.
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// @param search (String) - The string to seek.
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// @param start (Int, optional) - Limit the search to a subset of the text, beginning at start.
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// @param end (Int, optional) - Limit the search to a subset of the text, ending at end
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// @returns (Int) - The character position of the match.
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// If search is not contained in text, -1 is returned. If search is empty, start is returned.
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func FindFirst(_ context.Context, args ...core.Value) (core.Value, error) {
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err := core.ValidateArgs(args, 2, 4)
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if err != nil {
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return values.NewInt(-1), err
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}
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argsCount := len(args)
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text := args[0].String()
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runes := []rune(text)
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search := args[1].String()
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start := values.NewInt(0)
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end := values.NewInt(len(text))
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if argsCount == 3 {
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arg3 := args[2]
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if arg3.Type() == types.Int {
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start = arg3.(values.Int)
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}
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}
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if argsCount == 4 {
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arg4 := args[3]
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if arg4.Type() == types.Int {
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end = arg4.(values.Int)
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}
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}
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found := strings.Index(string(runes[start:end]), search)
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if found > -1 {
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return values.NewInt(found + int(start)), nil
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}
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return values.NewInt(found), nil
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}
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// FindLast returns the position of the last occurrence of the string search inside the string text. Positions start at 0.
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// @param src (String) - The source string.
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// @param search (String) - The string to seek.
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// @param start (Int, optional) - Limit the search to a subset of the text, beginning at start.
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// @param end (Int, optional) - Limit the search to a subset of the text, ending at end
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// @returns (Int) - The character position of the match.
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// If search is not contained in text, -1 is returned. If search is empty, start is returned.
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func FindLast(_ context.Context, args ...core.Value) (core.Value, error) {
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err := core.ValidateArgs(args, 2, 4)
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if err != nil {
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return values.NewInt(-1), err
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}
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argsCount := len(args)
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text := args[0].String()
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runes := []rune(text)
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search := args[1].String()
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start := values.NewInt(0)
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end := values.NewInt(len(text))
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if argsCount == 3 {
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arg3 := args[2]
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if arg3.Type() == types.Int {
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start = arg3.(values.Int)
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}
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}
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if argsCount == 4 {
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arg4 := args[3]
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if arg4.Type() == types.Int {
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end = arg4.(values.Int)
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}
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}
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found := strings.LastIndex(string(runes[start:end]), search)
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if found > -1 {
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return values.NewInt(found + int(start)), nil
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}
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return values.NewInt(found), nil
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}
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