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335 lines
10 KiB
C++
335 lines
10 KiB
C++
/**
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* Copyright (c) 2013, 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 lnav_util.cc
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*
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* Dumping ground for useful functions with no other home.
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*/
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#include "lnav_util.hh"
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#include <stdio.h>
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#include <sys/stat.h>
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#include "base/ansi_scrubber.hh"
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#include "base/itertools.hh"
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#include "base/result.h"
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#include "bookmarks.hh"
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#include "config.h"
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#include "fmt/format.h"
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#include "log_format_fwd.hh"
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#include "view_curses.hh"
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#include "yajlpp/yajlpp.hh"
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#include "yajlpp/yajlpp_def.hh"
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bool
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change_to_parent_dir()
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{
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bool retval = false;
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char cwd[3] = "";
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if (getcwd(cwd, sizeof(cwd)) == nullptr) {
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/* perror("getcwd"); */
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}
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if (strcmp(cwd, "/") != 0) {
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if (chdir("..") == -1) {
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perror("chdir('..')");
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} else {
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retval = true;
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}
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}
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return retval;
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}
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bool
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is_dev_null(const struct stat& st)
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{
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struct stat null_stat;
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stat("/dev/null", &null_stat);
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return st.st_dev == null_stat.st_dev && st.st_ino == null_stat.st_ino;
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}
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bool
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is_dev_null(int fd)
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{
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struct stat fd_stat;
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fstat(fd, &fd_stat);
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return is_dev_null(fd_stat);
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}
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void
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write_line_to(FILE* outfile, const attr_line_t& al)
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{
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const auto& al_attrs = al.get_attrs();
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auto lr = find_string_attr_range(al_attrs, &SA_ORIGINAL_LINE);
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if (!lr.is_valid() || lr.lr_start > 1) {
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// If the line is prefixed with some extra information, include that
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// in the output. For example, the log file name or time offset.
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lnav::console::println(outfile, al);
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} else {
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lnav::console::println(outfile, al.subline(lr.lr_start, lr.length()));
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}
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}
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namespace lnav {
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std::string
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to_json(const std::string& str)
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{
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yajlpp_gen gen;
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yajl_gen_config(gen, yajl_gen_beautify, false);
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yajl_gen_string(gen, str);
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return gen.to_string_fragment().to_string();
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}
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static void
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to_json(yajlpp_gen& gen, const attr_line_t& al)
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{
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{
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yajlpp_map root_map(gen);
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root_map.gen("str");
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root_map.gen(al.get_string());
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root_map.gen("attrs");
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{
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yajlpp_array attr_array(gen);
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for (const auto& sa : al.get_attrs()) {
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yajlpp_map elem_map(gen);
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elem_map.gen("start");
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elem_map.gen(sa.sa_range.lr_start);
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elem_map.gen("end");
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elem_map.gen(sa.sa_range.lr_end);
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elem_map.gen("type");
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elem_map.gen(sa.sa_type->sat_name);
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elem_map.gen("value");
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sa.sa_value.match(
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[&](int64_t i) { elem_map.gen(i); },
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[&](role_t r) {
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elem_map.gen(lnav::enums::to_underlying(r));
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},
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[&](const intern_string_t& str) { elem_map.gen(str); },
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[&](const std::string& str) { elem_map.gen(str); },
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[&](const text_attrs& ta) { elem_map.gen(ta.ta_attrs); },
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[&](const std::shared_ptr<logfile>& lf) {
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elem_map.gen("");
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},
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[&](const bookmark_metadata* bm) { elem_map.gen(""); },
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[&](const timespec& ts) { elem_map.gen(""); },
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[&](const string_fragment& sf) { elem_map.gen(sf); });
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}
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}
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}
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}
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std::string
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to_json(const attr_line_t& al)
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{
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yajlpp_gen gen;
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yajl_gen_config(gen, yajl_gen_beautify, false);
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to_json(gen, al);
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return gen.to_string_fragment().to_string();
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}
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std::string
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to_json(const lnav::console::user_message& um)
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{
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yajlpp_gen gen;
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yajl_gen_config(gen, yajl_gen_beautify, false);
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{
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yajlpp_map root_map(gen);
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root_map.gen("level");
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switch (um.um_level) {
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case console::user_message::level::raw:
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root_map.gen("raw");
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break;
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case console::user_message::level::ok:
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root_map.gen("ok");
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break;
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case console::user_message::level::info:
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root_map.gen("info");
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break;
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case console::user_message::level::warning:
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root_map.gen("warning");
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break;
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case console::user_message::level::error:
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root_map.gen("error");
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break;
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}
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root_map.gen("message");
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to_json(gen, um.um_message);
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root_map.gen("reason");
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to_json(gen, um.um_reason);
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root_map.gen("snippets");
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{
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yajlpp_array snippet_array(gen);
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for (const auto& snip : um.um_snippets) {
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yajlpp_map snip_map(gen);
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snip_map.gen("source");
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snip_map.gen(snip.s_location.sl_source);
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snip_map.gen("line");
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snip_map.gen(snip.s_location.sl_line_number);
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snip_map.gen("content");
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to_json(gen, snip.s_content);
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}
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}
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root_map.gen("help");
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to_json(gen, um.um_help);
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}
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return gen.to_string_fragment().to_string();
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}
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static int
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read_string_attr_type(yajlpp_parse_context* ypc,
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const unsigned char* str,
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size_t len)
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{
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auto* sa = (string_attr*) ypc->ypc_obj_stack.top();
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auto type = std::string((const char*) str, len);
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if (type == "role") {
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sa->sa_type = &VC_ROLE;
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} else if (type == "preformatted") {
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sa->sa_type = &SA_PREFORMATTED;
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} else if (type == "style") {
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sa->sa_type = &VC_STYLE;
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} else {
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log_error("unhandled string_attr type: %s", type.c_str());
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ensure(false);
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}
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return 1;
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}
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static int
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read_string_attr_int_value(yajlpp_parse_context* ypc, long long in)
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{
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auto* sa = (string_attr*) ypc->ypc_obj_stack.top();
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if (sa->sa_type == &VC_ROLE) {
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sa->sa_value = static_cast<role_t>(in);
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} else if (sa->sa_type == &VC_STYLE) {
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sa->sa_value = text_attrs{
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static_cast<int32_t>(in),
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};
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}
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return 1;
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}
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static const struct json_path_container string_attr_handlers = {
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yajlpp::property_handler("start").for_field(&string_attr::sa_range,
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&line_range::lr_start),
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yajlpp::property_handler("end").for_field(&string_attr::sa_range,
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&line_range::lr_end),
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yajlpp::property_handler("type").add_cb(read_string_attr_type),
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yajlpp::property_handler("value").add_cb(read_string_attr_int_value),
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};
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static const typed_json_path_container<attr_line_t> attr_line_handlers = {
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yajlpp::property_handler("str").for_field(&attr_line_t::al_string),
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yajlpp::property_handler("attrs#")
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.for_field(&attr_line_t::al_attrs)
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.with_children(string_attr_handlers),
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};
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template<>
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Result<attr_line_t, std::vector<console::user_message>>
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from_json(const std::string& json)
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{
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static const auto STRING_SRC = intern_string::lookup("string");
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return attr_line_handlers.parser_for(STRING_SRC).of(json);
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}
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static const json_path_container snippet_handlers = {
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yajlpp::property_handler("source").for_field(&console::snippet::s_location,
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&source_location::sl_source),
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yajlpp::property_handler("line").for_field(
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&console::snippet::s_location, &source_location::sl_line_number),
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yajlpp::property_handler("content")
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.for_child(&console::snippet::s_content)
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.with_children(attr_line_handlers),
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};
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static const json_path_handler_base::enum_value_t LEVEL_ENUM[] = {
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{"raw", lnav::console::user_message::level::raw},
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{"ok", lnav::console::user_message::level::ok},
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{"info", lnav::console::user_message::level::info},
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{"warning", lnav::console::user_message::level::warning},
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{"error", lnav::console::user_message::level::error},
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json_path_handler_base::ENUM_TERMINATOR,
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};
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static const typed_json_path_container<console::user_message>
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user_message_handlers = {
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yajlpp::property_handler("level")
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.with_enum_values(LEVEL_ENUM)
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.for_field(&console::user_message::um_level),
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yajlpp::property_handler("message")
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.for_child(&console::user_message::um_message)
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.with_children(attr_line_handlers),
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yajlpp::property_handler("reason")
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.for_child(&console::user_message::um_reason)
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.with_children(attr_line_handlers),
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yajlpp::property_handler("snippets#")
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.for_field(&console::user_message::um_snippets)
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.with_children(snippet_handlers),
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yajlpp::property_handler("help")
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.for_child(&console::user_message::um_help)
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.with_children(attr_line_handlers),
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};
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template<>
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Result<lnav::console::user_message, std::vector<console::user_message>>
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from_json(const std::string& json)
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{
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static const auto STRING_SRC = intern_string::lookup("string");
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return user_message_handlers.parser_for(STRING_SRC).of(json);
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}
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} // namespace lnav
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