79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
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/*
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* Copyright 2012 Matthew McCormick
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* */
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// This file was Authored by Justin Crawford <Justasic@gmail.com>
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// Based on: https://github.com/freebsd/freebsd/blob/master/usr.bin/top/machine.c
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// Based on: Apple.cpp for load_string/mem_string and apple's documentation
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#include <sstream>
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#include <string>
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#include <stdlib.h> // getloadavg()
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#include <cmath> // floorf()
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#include <sys/types.h>
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#include "cpu.h"
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#include "load.h"
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#include "../luts.h"
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// Load Averages
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std::string load_string( bool use_colors = false )
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{
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std::stringstream ss;
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// Only get 3 load averages
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cont int nelem = 3;
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double averages[nelem];
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// based on: opensource.apple.com/source/Libc/Libc-262/gen/getloadavg.c
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if( getloadavg( averages, nelem ) < 0)
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{
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ss << "0.00 0.00 0.00"; // couldn't get averages.
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}
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else
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{
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if( use_colors )
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{
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// may not work
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uint8_t cpu_count = getCpuCount();
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unsigned load_percent = static_cast<unsigned int>(
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averages[0] / cpu_count * 0.5f * 100.0f);
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if( load_percent > 100 )
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{
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load_percent = 100;
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}
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ss << load_lut[load_percent];
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}
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for( int i = 0; i < nelem; ++i )
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{
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// Round to nearest, make sure this is only a 0.00 value not a 0.0000
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float avg = floorf( static_cast<float> (averages[i] ) * 100 + 0.5 ) / 100;
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ss << avg << " ";
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}
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if( use_colors )
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{
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ss << "#[fg=default,bg=default]";
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}
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}
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return ss.str();
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}
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