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185 lines
6.1 KiB
Rust
185 lines
6.1 KiB
Rust
/*
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* Copyright (c) 2020-2023, Stalwart Labs Ltd.
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*
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* This file is part of the Stalwart Sieve Interpreter.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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* in the LICENSE file at the top-level directory of this distribution.
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* You can be released from the requirements of the AGPLv3 license by
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* purchasing a commercial license. Please contact licensing@stalw.art
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* for more details.
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*/
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use serde::{Deserialize, Serialize};
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use std::convert::TryFrom;
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use crate::sieve::{
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compiler::{
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grammar::instruction::{CompilerState, Instruction},
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lexer::{tokenizer::TokenInfo, word::Word, Token},
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CompileError, ErrorType, Value, VariableType,
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},
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Envelope,
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};
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#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
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pub(crate) enum Modifier {
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Lower,
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Upper,
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LowerFirst,
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UpperFirst,
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QuoteWildcard,
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QuoteRegex,
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EncodeUrl,
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Length,
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Replace { find: Value, replace: Value },
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}
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impl Modifier {
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pub fn order(&self) -> usize {
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match self {
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Modifier::Lower => 41,
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Modifier::Upper => 40,
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Modifier::LowerFirst => 31,
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Modifier::UpperFirst => 30,
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Modifier::QuoteWildcard => 20,
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Modifier::QuoteRegex => 21,
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Modifier::EncodeUrl => 15,
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Modifier::Length => 10,
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Modifier::Replace { .. } => 40,
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}
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
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pub(crate) struct Set {
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pub modifiers: Vec<Modifier>,
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pub name: VariableType,
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pub value: Value,
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}
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impl<'x> CompilerState<'x> {
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pub(crate) fn parse_set(&mut self) -> Result<(), CompileError> {
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let mut modifiers = Vec::new();
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let mut name = None;
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let mut is_local = false;
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let value;
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loop {
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let token_info = self.tokens.unwrap_next()?;
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match token_info.token {
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Token::Tag(
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word @ (Word::Lower
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| Word::Upper
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| Word::LowerFirst
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| Word::UpperFirst
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| Word::QuoteWildcard
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| Word::QuoteRegex
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| Word::Length
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| Word::EncodeUrl),
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) => {
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let modifier = word.into();
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if !modifiers.contains(&modifier) {
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modifiers.push(modifier);
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}
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}
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Token::Tag(Word::Replace) => {
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let find = self.tokens.unwrap_next()?;
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let replace = self.tokens.unwrap_next()?;
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modifiers.push(Modifier::Replace {
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find: self.parse_string_token(find)?,
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replace: self.parse_string_token(replace)?,
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});
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}
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Token::Tag(Word::Local) => {
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is_local = true;
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}
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_ => {
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if name.is_none() {
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name = self.parse_variable_name(token_info, is_local)?.into();
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} else {
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value = self.parse_string_token(token_info)?;
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break;
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}
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}
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}
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}
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modifiers.sort_unstable_by_key(|m| std::cmp::Reverse(m.order()));
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self.instructions.push(Instruction::Set(Set {
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modifiers,
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name: name.unwrap(),
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value,
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}));
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Ok(())
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}
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pub(crate) fn parse_variable_name(
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&mut self,
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token_info: TokenInfo,
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register_as_local: bool,
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) -> Result<VariableType, CompileError> {
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match token_info.token {
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Token::StringConstant(value) => self
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.register_variable(value.into_string(), register_as_local)
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.map_err(|error_type| CompileError {
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line_num: token_info.line_num,
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line_pos: token_info.line_pos,
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error_type,
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}),
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_ => Err(token_info.custom(ErrorType::ExpectedConstantString)),
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}
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}
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pub(crate) fn register_variable(
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&mut self,
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name: String,
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register_as_local: bool,
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) -> Result<VariableType, ErrorType> {
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let name = name.to_lowercase();
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if let Some((namespace, part)) = name.split_once('.') {
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match namespace {
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"global" | "t" => Ok(VariableType::Global(part.to_string())),
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"envelope" => Envelope::try_from(part)
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.map(VariableType::Envelope)
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.map_err(|_| ErrorType::InvalidNamespace(namespace.to_string())),
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_ => Err(ErrorType::InvalidNamespace(namespace.to_string())),
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}
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} else {
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Ok(if !self.is_var_global(&name) {
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VariableType::Local(self.register_local_var(name, register_as_local))
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} else {
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VariableType::Global(name)
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})
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}
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}
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}
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impl From<Word> for Modifier {
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fn from(word: Word) -> Self {
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match word {
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Word::Lower => Modifier::Lower,
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Word::Upper => Modifier::Upper,
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Word::LowerFirst => Modifier::LowerFirst,
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Word::UpperFirst => Modifier::UpperFirst,
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Word::QuoteWildcard => Modifier::QuoteWildcard,
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Word::QuoteRegex => Modifier::QuoteRegex,
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Word::Length => Modifier::Length,
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Word::EncodeUrl => Modifier::EncodeUrl,
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_ => unreachable!(),
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}
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}
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}
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