github.com/transparency-dev/armored-witness-os@v0.1.3-0.20240514084412-27eef7325168/trusted_os/log.go (about)

     1  // Copyright 2022 The Armored Witness OS authors. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"bytes"
    19  	"os"
    20  )
    21  
    22  var buf bytes.Buffer
    23  
    24  const (
    25  	outputLimit = 1024
    26  	flushChr    = 0x0a // \n
    27  )
    28  
    29  func bufferedStdoutLog(c byte) (err error) {
    30  	buf.WriteByte(c)
    31  
    32  	if c == flushChr || buf.Len() > outputLimit {
    33  		_, err = os.Stdout.Write(buf.Bytes())
    34  		buf.Reset()
    35  	}
    36  
    37  	return
    38  }