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https://github.com/ksherlock/mpw-shell.git
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f125b533f7
commit f0944a89f27e44b1764988806e655f09764e80df
Author: Kelvin Sherlock <ksherlock@gmail.com>
Date: Tue Aug 30 12:24:08 2016 -0400
exit throws execution of input error w/ possible 0 value. catch it.
commit 9e7f9c1ae049aa26513413f4767268b47ee22e98
Author: Kelvin Sherlock <ksherlock@gmail.com>
Date: Tue Aug 30 12:23:21 2016 -0400
builtins - more consistent argument handling.
commit be4c1c902f5a3a3f01e92ae52c7d6cc5d8731b65
Author: Kelvin Sherlock <ksherlock@gmail.com>
Date: Tue Aug 30 12:23:01 2016 -0400
.
commit 68d0c29fec112c6e7bc3a672b41eb7eb758a8941
Author: Kelvin Sherlock <ksherlock@gmail.com>
Date: Tue Aug 30 12:22:51 2016 -0400
exit command.
commit 25b0a7f7da9220b03026123bb5072c2da1d73fde
Author: Kelvin Sherlock <ksherlock@gmail.com>
Date: Tue Aug 30 12:21:16 2016 -0400
builtin quit command.
106 lines
1.7 KiB
C++
106 lines
1.7 KiB
C++
#include <algorithm>
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#include "mpw_parser.h"
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#include "phase3_parser.h"
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#include "command.h"
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#include "error.h"
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mpw_parser::mpw_parser(Environment &e, fdmask fds, bool interactive) : _env(e), _fds(fds), _interactive(interactive)
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{
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_p3 = phase3::make();
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_p2.set_next([this](int type, std::string &&s){
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_p3->parse(type, std::move(s));
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});
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_p1.set_next([this](std::string &&s){
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_p2.parse(std::move(s));
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});
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}
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mpw_parser::~mpw_parser() {
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}
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bool mpw_parser::continuation() const {
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if (_p1.continuation()) return true;
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if (_p2.continuation()) return true;
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if (_p3->continuation()) return true;
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return false;
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}
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void mpw_parser::finish() {
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_p1.finish();
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_p2.finish();
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_p3->parse(0, "");
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// and now execute the commands...
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execute();
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}
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void mpw_parser::reset() {
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_p1.reset();
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_p2.reset();
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_p3->reset();
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_abort = false;
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}
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void mpw_parser::abort() {
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_p1.abort();
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_p2.abort();
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//_p3->abort();
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_p3->reset();
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_abort = true;
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}
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void mpw_parser::parse(const void *begin, const void *end) {
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if (_abort) return;
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_p1.parse((const unsigned char *)begin, (const unsigned char *)end);
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// and execute...
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execute();
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}
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void mpw_parser::execute() {
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if (_abort) {
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_p3->command_queue.clear();
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return;
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}
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auto commands = std::move(_p3->command_queue);
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_p3->command_queue.clear();
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std::reverse(commands.begin(), commands.end());
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command_ptr cmd;
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try {
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while (!commands.empty()) {
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cmd = std::move(commands.back());
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commands.pop_back();
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cmd->execute(_env, _fds);
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}
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} catch (execution_of_input_terminated &ex) {
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_env.status(ex.status(), false);
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if (_interactive) {
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if (!cmd->terminal() || !commands.empty()) {
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if (ex.status()) fprintf(stderr, "### %s\n", ex.what());
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}
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return;
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}
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_abort = true;
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throw;
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}
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} |