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130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
/**
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* Copyright (c) 2015, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @file shlex.hh
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*/
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#ifndef LNAV_SHLEX_HH_H
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#define LNAV_SHLEX_HH_H
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#include <functional>
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#include <map>
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#include <string>
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#include <vector>
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#include <pwd.h>
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#include "base/attr_line.hh"
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#include "base/intern_string.hh"
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#include "base/opt_util.hh"
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#include "shlex.resolver.hh"
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enum class shlex_token_t {
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eof,
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whitespace,
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escape,
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double_quote_start,
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double_quote_end,
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single_quote_start,
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single_quote_end,
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variable_ref,
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quoted_variable_ref,
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tilde,
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};
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class shlex {
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public:
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static std::string escape(std::string s);
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shlex(const char* str, size_t len) : s_str(str), s_len(len) {}
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explicit shlex(const string_fragment& sf)
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: s_str(sf.data()), s_len(sf.length())
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{
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}
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explicit shlex(const std::string& str)
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: s_str(str.c_str()), s_len(str.size())
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{
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}
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shlex& with_ignore_quotes(bool val)
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{
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this->s_ignore_quotes = val;
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return *this;
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}
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struct tokenize_result_t {
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shlex_token_t tr_token;
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string_fragment tr_frag;
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};
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struct tokenize_error_t {
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const char* te_msg{nullptr};
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string_fragment te_source;
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};
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Result<tokenize_result_t, tokenize_error_t> tokenize();
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bool eval(std::string& result, const scoped_resolver& vars);
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struct split_element_t {
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string_fragment se_origin;
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std::string se_value;
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};
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Result<std::vector<split_element_t>, tokenize_error_t> split(
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const scoped_resolver& vars);
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void reset()
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{
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this->s_index = 0;
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this->s_state = state_t::STATE_NORMAL;
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}
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Result<tokenize_result_t, tokenize_error_t> scan_variable_ref();
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void resolve_home_dir(std::string& result, string_fragment cap) const;
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attr_line_t to_attr_line(const tokenize_error_t& te) const;
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enum class state_t {
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STATE_NORMAL,
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STATE_IN_DOUBLE_QUOTE,
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STATE_IN_SINGLE_QUOTE,
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};
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const char* s_str;
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ssize_t s_len;
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bool s_ignore_quotes{false};
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ssize_t s_index{0};
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state_t s_state{state_t::STATE_NORMAL};
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};
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#endif // LNAV_SHLEX_HH_H
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