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/**
* Copyright (c) 2007-2012, 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.
*/
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "config.h"
#include "grep_proc.hh"
#include "line_buffer.hh"
#include "listview_curses.hh"
using namespace std;
class my_source : public grep_proc_source<vis_line_t> {
public:
my_source(auto_fd& fd) { this->ms_buffer.set_fd(fd); };
bool grep_value_for_line(vis_line_t line_number, string& value_out)
{
bool retval = false;
try {
auto load_result = this->ms_buffer.load_next_line(this->ms_range);
if (load_result.isOk()) {
auto li = load_result.unwrap();
this->ms_range = li.li_file_range;
if (!li.li_file_range.empty()) {
auto read_result
= this->ms_buffer.read_range(li.li_file_range)
.then([&value_out](auto sbr) {
value_out = to_string(sbr);
});
retval = read_result.isOk();
}
}
} catch (const line_buffer::error& e) {
fprintf(stderr,
"error: source buffer error %d %s\n",
this->ms_buffer.get_fd(),
strerror(e.e_err));
}
return retval;
};
private:
line_buffer ms_buffer;
file_range ms_range;
};
class my_sink : public grep_proc_sink<vis_line_t> {
public:
my_sink() : ms_finished(false) {}
void grep_match(grep_proc<vis_line_t>& gp,
vis_line_t line,
int start,
int end)
{
printf("%d:%d:%d\n", (int) line, start, end);
}
void grep_capture(grep_proc<vis_line_t>& gp,
vis_line_t line,
int start,
int end,
char* capture)
{
fprintf(stderr, "%d(%d:%d)%s\n", (int) line, start, end, capture);
}
void grep_end(grep_proc<vis_line_t>& gp) { this->ms_finished = true; }
bool ms_finished;
};
int
main(int argc, char* argv[])
{
int retval = EXIT_SUCCESS;
auto_fd fd;
if (argc < 3) {
fprintf(stderr, "error: expecting pattern and file arguments\n");
retval = EXIT_FAILURE;
} else if ((fd = open(argv[2], O_RDONLY)) == -1) {
perror("open");
retval = EXIT_FAILURE;
} else {
auto compile_res = lnav::pcre2pp::code::from(
string_fragment::from_c_str(argv[1]), PCRE2_CASELESS);
if (compile_res.isErr()) {
auto ce = compile_res.unwrapErr();
fprintf(stderr,
"error: invalid pattern -- %s\n",
ce.get_message().c_str());
} else {
auto co = compile_res.unwrap().to_shared();
auto psuperv = std::make_shared<pollable_supervisor>();
my_source ms(fd);
my_sink msink;
grep_proc<vis_line_t> gp(co, ms, psuperv);
gp.set_sink(&msink);
gp.queue_request();
gp.start();
while (!msink.ms_finished) {
vector<struct pollfd> pollfds;
psuperv->update_poll_set(pollfds);
poll(&pollfds[0], pollfds.size(), -1);
psuperv->check_poll_set(pollfds);
}
}
}
return retval;
}
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