2023-01-23 18:54:21 +07:00
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/*
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* SPDX-License-Identifier: AGPL-3.0-only
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* Copyright (c) since 2022, mzz2017 (mzz@tuta.io). All rights reserved.
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*/
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package routing
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import (
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"fmt"
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2023-01-24 13:25:21 +07:00
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"github.com/antlr/antlr4/runtime/Go/antlr/v4"
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2023-01-23 18:54:21 +07:00
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"github.com/v2rayA/RoutingA-dist/go/routingA"
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)
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func Parse(in string) (routingRules []RoutingRule, finalOutbound string, err error) {
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errorListener := NewConsoleErrorListener()
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lexer := routingA.NewroutingALexer(antlr.NewInputStream(in))
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lexer.RemoveErrorListeners()
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lexer.AddErrorListener(errorListener)
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input := antlr.NewCommonTokenStream(lexer, 0)
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parser := routingA.NewroutingAParser(input)
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parser.RemoveErrorListeners()
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parser.AddErrorListener(errorListener)
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parser.BuildParseTrees = true
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tree := parser.Start()
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walker := NewRoutingAWalker(parser)
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antlr.ParseTreeWalkerDefault.Walk(walker, tree)
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if errorListener.ErrorBuilder.Len() != 0 {
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return nil, "", fmt.Errorf("%v", errorListener.ErrorBuilder.String())
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}
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return walker.RoutingRules, walker.FinalOutbound, nil
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}
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