51f85ba032
* Use std::sting instead of char[] in the graph drawing functions. This is the only change to the code. Rest is just styling. * Corrected whole code to follow Allman/GNU coding style, with 2 spaces for each indentation step. * Added license headers to all code files * Added vim modelines to all files. They sit on the first line and enable the following settings: 2 space indentation, tab expansion to spaces, line at 80th column, automatic line breaking on "\ !@*+-;:,./?" characters, automatic line break if line exceeds 80 colums. This should keep the code nice and tidy.
90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
/*
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* Copyright 2012 Matthew McCormick
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* Copyright 2013 Justin Crawford <Justasic@gmail.com>
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* Copyright 2015 Pawel 'l0ner' Soltys
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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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#include <string>
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#include <sstream>
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#include <fstream>
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#include <cmath> // floorf()
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#include <unistd.h>
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#include <stdlib.h> // getloadavg()
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#include "load.h"
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#include "../luts.h"
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std::string load_string( bool use_colors = false )
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{
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std::ostringstream oss;
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// Both apple and BSD style systems have these api calls
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// Only get 3 load averages
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const int nelem = 3;
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double averages[nelem];
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// based on:
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// http://www.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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oss << "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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for( int i = 0; i < nelem; ++i )
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{
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// Round to nearest, make sure this is
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// 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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oss << avg << " ";
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}
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}
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std::string load_line( oss.str() );
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oss.str( "" );
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if( use_colors )
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{
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// Likely does not work on BSD, but not tested
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unsigned number_of_cpus = sysconf( _SC_NPROCESSORS_ONLN );
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std::istringstream iss( load_line.substr( 0, 4 ) );
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float recent_load;
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iss >> recent_load;
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// colors range from zero to twice the number of
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// cpu's for the most recent load metric
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unsigned load_percent = static_cast< unsigned int >(
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recent_load / number_of_cpus * 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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oss << load_lut[load_percent];
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}
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oss << load_line.substr( 0, 14 );
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if( use_colors )
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{
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oss << "#[fg=default,bg=default]";
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}
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return oss.str();
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}
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