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Source file src/os/str.go

  // Copyright 2009 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // Simple conversions to avoid depending on strconv.
  
  package os
  
  // Convert integer to decimal string
  func itoa(val int) string {
  	if val < 0 {
  		return "-" + uitoa(uint(-val))
  	}
  	return uitoa(uint(val))
  }
  
  // Convert unsigned integer to decimal string
  func uitoa(val uint) string {
  	if val == 0 { // avoid string allocation
  		return "0"
  	}
  	var buf [20]byte // big enough for 64bit value base 10
  	i := len(buf) - 1
  	for val >= 10 {
  		q := val / 10
  		buf[i] = byte('0' + val - q*10)
  		i--
  		val = q
  	}
  	// val < 10
  	buf[i] = byte('0' + val)
  	return string(buf[i:])
  }
  

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