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163 lines
4.2 KiB
C++
163 lines
4.2 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 ON
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* 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 "config.h"
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#include <stdio.h>
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#include <fcntl.h>
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#include <sqlite3.h>
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#include "lnav_util.hh"
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std::string hash_string(const std::string &str)
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{
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byte_array<SHA_DIGEST_LENGTH> hash;
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SHA_CTX context;
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SHA_Init(&context);
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SHA_Update(&context, str.c_str(), str.length());
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SHA_Final(hash.out(), &context);
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return hash.to_string();
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}
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std::string time_ago(time_t last_time)
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{
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time_t delta, current_time = time(NULL);
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const char *fmt;
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char buffer[64];
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int amount;
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delta = current_time - last_time;
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if (delta < 0) {
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return "in the future";
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}
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else if (delta < 60) {
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return "just now";
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}
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else if (delta < (60 * 2)) {
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return "one minute ago";
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}
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else if (delta < (60 * 60)) {
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fmt = "%d minutes ago";
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amount = delta / 60;
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}
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else if (delta < (2 * 60 * 60)) {
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return "one hour ago";
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}
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else if (delta < (24 * 60 * 60)) {
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fmt = "%d hours ago";
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amount = delta / (60 * 60);
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}
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else if (delta < (2 * 24 * 60 * 60)) {
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return "one day ago";
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}
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else if (delta < (365 * 24 * 60 * 60)) {
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fmt = "%d days ago";
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amount = delta / (24 * 60 * 60);
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}
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else {
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return "over a year ago";
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}
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snprintf(buffer, sizeof(buffer), fmt, amount);
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return std::string(buffer);
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}
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/* XXX figure out how to do this with the template */
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void sqlite_close_wrapper(void *mem)
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{
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sqlite3_close((sqlite3 *)mem);
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}
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std::string get_current_dir(void)
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{
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char cwd[FILENAME_MAX];
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std::string retval = ".";
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if (getcwd(cwd, sizeof(cwd)) == NULL) {
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perror("getcwd");
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}
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else {
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retval = std::string(cwd);
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}
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if (retval != "/") {
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retval += "/";
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}
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return retval;
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}
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bool change_to_parent_dir(void)
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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)) == NULL) {
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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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}
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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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file_format_t detect_file_format(const std::string &filename)
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{
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file_format_t retval = FF_UNKNOWN;
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int fd;
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if ((fd = open(filename.c_str(), O_RDONLY)) != -1) {
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char buffer[32];
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int rc;
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if ((rc = read(fd, buffer, sizeof(buffer))) > 0) {
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if (rc > 16 &&
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strncmp(buffer, "SQLite format 3", 16) == 0) {
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retval = FF_SQLITE_DB;
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}
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}
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}
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return retval;
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}
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