From 5068d34c08f951a7ea6257d305a1627b09a95817 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 19:44:55 +0200 Subject: Adding upstream version 0.11.1. Signed-off-by: Daniel Baumann --- src/lnav_util.cc | 334 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 334 insertions(+) create mode 100644 src/lnav_util.cc (limited to 'src/lnav_util.cc') diff --git a/src/lnav_util.cc b/src/lnav_util.cc new file mode 100644 index 0000000..e5540d9 --- /dev/null +++ b/src/lnav_util.cc @@ -0,0 +1,334 @@ +/** + * Copyright (c) 2013, 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 lnav_util.cc + * + * Dumping ground for useful functions with no other home. + */ + +#include "lnav_util.hh" + +#include +#include + +#include "base/ansi_scrubber.hh" +#include "base/itertools.hh" +#include "base/result.h" +#include "bookmarks.hh" +#include "config.h" +#include "fmt/format.h" +#include "log_format_fwd.hh" +#include "view_curses.hh" +#include "yajlpp/yajlpp.hh" +#include "yajlpp/yajlpp_def.hh" + +bool +change_to_parent_dir() +{ + bool retval = false; + char cwd[3] = ""; + + if (getcwd(cwd, sizeof(cwd)) == nullptr) { + /* perror("getcwd"); */ + } + if (strcmp(cwd, "/") != 0) { + if (chdir("..") == -1) { + perror("chdir('..')"); + } else { + retval = true; + } + } + + return retval; +} + +bool +is_dev_null(const struct stat& st) +{ + struct stat null_stat; + + stat("/dev/null", &null_stat); + + return st.st_dev == null_stat.st_dev && st.st_ino == null_stat.st_ino; +} + +bool +is_dev_null(int fd) +{ + struct stat fd_stat; + + fstat(fd, &fd_stat); + return is_dev_null(fd_stat); +} + +void +write_line_to(FILE* outfile, const attr_line_t& al) +{ + const auto& al_attrs = al.get_attrs(); + auto lr = find_string_attr_range(al_attrs, &SA_ORIGINAL_LINE); + + if (!lr.is_valid() || lr.lr_start > 1) { + // If the line is prefixed with some extra information, include that + // in the output. For example, the log file name or time offset. + lnav::console::println(outfile, al); + } else { + lnav::console::println(outfile, al.subline(lr.lr_start, lr.length())); + } +} + +namespace lnav { + +std::string +to_json(const std::string& str) +{ + yajlpp_gen gen; + + yajl_gen_config(gen, yajl_gen_beautify, false); + yajl_gen_string(gen, str); + + return gen.to_string_fragment().to_string(); +} + +static void +to_json(yajlpp_gen& gen, const attr_line_t& al) +{ + { + yajlpp_map root_map(gen); + + root_map.gen("str"); + root_map.gen(al.get_string()); + + root_map.gen("attrs"); + { + yajlpp_array attr_array(gen); + + for (const auto& sa : al.get_attrs()) { + yajlpp_map elem_map(gen); + + elem_map.gen("start"); + elem_map.gen(sa.sa_range.lr_start); + elem_map.gen("end"); + elem_map.gen(sa.sa_range.lr_end); + elem_map.gen("type"); + elem_map.gen(sa.sa_type->sat_name); + elem_map.gen("value"); + sa.sa_value.match( + [&](int64_t i) { elem_map.gen(i); }, + [&](role_t r) { + elem_map.gen(lnav::enums::to_underlying(r)); + }, + [&](const intern_string_t& str) { elem_map.gen(str); }, + [&](const std::string& str) { elem_map.gen(str); }, + [&](const text_attrs& ta) { elem_map.gen(ta.ta_attrs); }, + [&](const std::shared_ptr& lf) { + elem_map.gen(""); + }, + [&](const bookmark_metadata* bm) { elem_map.gen(""); }, + [&](const timespec& ts) { elem_map.gen(""); }, + [&](const string_fragment& sf) { elem_map.gen(sf); }); + } + } + } +} + +std::string +to_json(const attr_line_t& al) +{ + yajlpp_gen gen; + + yajl_gen_config(gen, yajl_gen_beautify, false); + to_json(gen, al); + + return gen.to_string_fragment().to_string(); +} + +std::string +to_json(const lnav::console::user_message& um) +{ + yajlpp_gen gen; + + yajl_gen_config(gen, yajl_gen_beautify, false); + + { + yajlpp_map root_map(gen); + + root_map.gen("level"); + switch (um.um_level) { + case console::user_message::level::raw: + root_map.gen("raw"); + break; + case console::user_message::level::ok: + root_map.gen("ok"); + break; + case console::user_message::level::info: + root_map.gen("info"); + break; + case console::user_message::level::warning: + root_map.gen("warning"); + break; + case console::user_message::level::error: + root_map.gen("error"); + break; + } + + root_map.gen("message"); + to_json(gen, um.um_message); + root_map.gen("reason"); + to_json(gen, um.um_reason); + root_map.gen("snippets"); + { + yajlpp_array snippet_array(gen); + + for (const auto& snip : um.um_snippets) { + yajlpp_map snip_map(gen); + + snip_map.gen("source"); + snip_map.gen(snip.s_location.sl_source); + snip_map.gen("line"); + snip_map.gen(snip.s_location.sl_line_number); + snip_map.gen("content"); + to_json(gen, snip.s_content); + } + } + root_map.gen("help"); + to_json(gen, um.um_help); + } + + return gen.to_string_fragment().to_string(); +} + +static int +read_string_attr_type(yajlpp_parse_context* ypc, + const unsigned char* str, + size_t len) +{ + auto* sa = (string_attr*) ypc->ypc_obj_stack.top(); + auto type = std::string((const char*) str, len); + + if (type == "role") { + sa->sa_type = &VC_ROLE; + } else if (type == "preformatted") { + sa->sa_type = &SA_PREFORMATTED; + } else if (type == "style") { + sa->sa_type = &VC_STYLE; + } else { + log_error("unhandled string_attr type: %s", type.c_str()); + ensure(false); + } + return 1; +} + +static int +read_string_attr_int_value(yajlpp_parse_context* ypc, long long in) +{ + auto* sa = (string_attr*) ypc->ypc_obj_stack.top(); + + if (sa->sa_type == &VC_ROLE) { + sa->sa_value = static_cast(in); + } else if (sa->sa_type == &VC_STYLE) { + sa->sa_value = text_attrs{ + static_cast(in), + }; + } + return 1; +} + +static const struct json_path_container string_attr_handlers = { + yajlpp::property_handler("start").for_field(&string_attr::sa_range, + &line_range::lr_start), + yajlpp::property_handler("end").for_field(&string_attr::sa_range, + &line_range::lr_end), + yajlpp::property_handler("type").add_cb(read_string_attr_type), + yajlpp::property_handler("value").add_cb(read_string_attr_int_value), +}; + +static const typed_json_path_container attr_line_handlers = { + yajlpp::property_handler("str").for_field(&attr_line_t::al_string), + yajlpp::property_handler("attrs#") + .for_field(&attr_line_t::al_attrs) + .with_children(string_attr_handlers), +}; + +template<> +Result> +from_json(const std::string& json) +{ + static const auto STRING_SRC = intern_string::lookup("string"); + + return attr_line_handlers.parser_for(STRING_SRC).of(json); +} + +static const json_path_container snippet_handlers = { + yajlpp::property_handler("source").for_field(&console::snippet::s_location, + &source_location::sl_source), + yajlpp::property_handler("line").for_field( + &console::snippet::s_location, &source_location::sl_line_number), + yajlpp::property_handler("content") + .for_child(&console::snippet::s_content) + .with_children(attr_line_handlers), +}; + +static const json_path_handler_base::enum_value_t LEVEL_ENUM[] = { + {"raw", lnav::console::user_message::level::raw}, + {"ok", lnav::console::user_message::level::ok}, + {"info", lnav::console::user_message::level::info}, + {"warning", lnav::console::user_message::level::warning}, + {"error", lnav::console::user_message::level::error}, + + json_path_handler_base::ENUM_TERMINATOR, +}; + +static const typed_json_path_container + user_message_handlers = { + yajlpp::property_handler("level") + .with_enum_values(LEVEL_ENUM) + .for_field(&console::user_message::um_level), + yajlpp::property_handler("message") + .for_child(&console::user_message::um_message) + .with_children(attr_line_handlers), + yajlpp::property_handler("reason") + .for_child(&console::user_message::um_reason) + .with_children(attr_line_handlers), + yajlpp::property_handler("snippets#") + .for_field(&console::user_message::um_snippets) + .with_children(snippet_handlers), + yajlpp::property_handler("help") + .for_child(&console::user_message::um_help) + .with_children(attr_line_handlers), +}; + +template<> +Result> +from_json(const std::string& json) +{ + static const auto STRING_SRC = intern_string::lookup("string"); + + return user_message_handlers.parser_for(STRING_SRC).of(json); +} + +} // namespace lnav -- cgit v1.2.3