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140 lines
3.6 KiB
C++
140 lines
3.6 KiB
C++
/**
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* Copyright (c) 2007-2012, 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.hh
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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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#ifndef __lnav_util_hh
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#define __lnav_util_hh
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#include <time.h>
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#include <sys/types.h>
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#include <openssl/sha.h>
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#include <string>
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#include "byte_array.hh"
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/**
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* Round down a number based on a given granularity.
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*
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* @param
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* @param step The granularity.
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*/
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inline int rounddown(size_t size, int step)
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{
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return size - (size % step);
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}
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inline int rounddown_offset(size_t size, int step, int offset)
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{
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return size - ((size - offset) % step);
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}
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inline int roundup(size_t size, int step)
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{
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int retval = size + step;
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retval -= (retval % step);
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return retval;
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}
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inline time_t day_num(time_t ti)
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{
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return ti / (24 * 60 * 60);
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}
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inline time_t hour_num(time_t ti)
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{
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return ti / (60 * 60);
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}
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std::string time_ago(time_t last_time);
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#if SIZEOF_OFF_T == 8
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#define FORMAT_OFF_T "%qd"
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#elif SIZEOF_OFF_T == 4
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#define FORMAT_OFF_T "%ld"
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#else
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#error "off_t has unhandled size..."
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#endif
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struct sha_updater {
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sha_updater(SHA_CTX *context) : su_context(context) { };
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void operator()(const std::string &str)
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{
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SHA_Update(this->su_context, str.c_str(), str.length());
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}
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SHA_CTX *su_context;
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};
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std::string hash_string(const std::string &str);
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template<typename UnaryFunction, typename Member>
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struct object_field_t {
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object_field_t(UnaryFunction &func, Member &mem)
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: of_func(func), of_mem(mem) {};
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template<typename Object>
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void operator()(Object obj)
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{
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this->of_func(obj.*(this->of_mem));
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};
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UnaryFunction &of_func;
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Member of_mem;
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};
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template<typename UnaryFunction, typename Member>
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object_field_t<UnaryFunction, Member> object_field(UnaryFunction &func,
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Member mem)
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{
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return object_field_t<UnaryFunction, Member>(func, mem);
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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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std::string get_current_dir(void);
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bool change_to_parent_dir(void);
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enum file_format_t {
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FF_UNKNOWN,
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FF_SQLITE_DB,
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};
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file_format_t detect_file_format(const std::string &filename);
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#endif
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