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