m8
/
src
/
m8
/
reader.cc
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131#include "m8/reader.hh"
#include "ob/term.hh"
namespace aec = OB::Term::ANSI_Escape_Codes;
#include "lib/linenoise.hh"
#include <cctype>
#include <cstdint>
#include <cstddef>
#include <string>
#include <sstream>
#include <iostream>
#include <fstream>
#include <vector>
#include <map>
#include <filesystem>
namespace fs = std::filesystem;
Reader::Reader()
{
if (readline_)
{
auto const fn_file = [](std::string file) {
auto const tilde = file.find_first_of("~");
if (tilde != std::string::npos)
{
std::string home {std::getenv("HOME")};
if (home.empty())
{
throw std::runtime_error("could not open the input file");
}
file.replace(tilde, 1, home);
}
return file;
};
history_ = fn_file(history_);
linenoise::LoadHistory(history_.c_str());
linenoise::SetMultiLine(true);
linenoise::SetHistoryMaxLen(1000);
linenoise::SetCompletionCallback([](const char* editBuffer, std::vector<std::string>& completions) {
// if (editBuffer[0] == 'a')
// {
// completions.push_back("all");
// completions.push_back("alli");
// }
});
}
}
Reader::~Reader()
{
if (readline_)
{
linenoise::SaveHistory(history_.c_str());
}
}
void Reader::open(std::string const& file_name)
{
ifile_.open(file_name);
if (! ifile_.is_open())
{
throw std::runtime_error("could not open the input file");
}
lines_[0] = 0;
readline_ = false;
}
std::string Reader::line()
{
return line_;
}
bool Reader::next(std::string& str)
{
++row_;
lines_[row_] = ifile_.tellg();
bool status {false};
if (readline_)
{
bool quit {false};
prompt_ = aec::wrap("M8[", aec::fg_magenta) + aec::wrap(std::to_string(row_), aec::fg_green) + aec::wrap("]>", aec::fg_magenta) + " ";
std::string input = linenoise::Readline(prompt_.c_str(), quit);
if (input == ".quit" || input == ".quit" || quit)
{
std::cout << "\n";
--row_;
status = false;
}
else
{
linenoise::AddHistory(input.c_str());
str = input;
line_ = str;
status = true;
}
return status;
}
else
{
if (std::getline(ifile_, str))
{
line_ = str;
status = true;
}
else
{
--row_;
status = false;
}
return status;
}
}
std::uint32_t Reader::row()
{
return row_;
}
std::uint32_t Reader::col()
{
return col_;
}