1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // Simple conversions to avoid depending on strconv. 6 7 package os 8 9 // Convert integer to decimal string 10 func itoa(val int) string { 11 if val < 0 { 12 return "-" + uitoa(uint(-val)) 13 } 14 return uitoa(uint(val)) 15 } 16 17 // Convert unsigned integer to decimal string 18 func uitoa(val uint) string { 19 if val == 0 { // avoid string allocation 20 return "0" 21 } 22 var buf [20]byte // big enough for 64bit value base 10 23 i := len(buf) - 1 24 for val >= 10 { 25 q := val / 10 26 buf[i] = byte('0' + val - q*10) 27 i-- 28 val = q 29 } 30 // val < 10 31 buf[i] = byte('0' + val) 32 return string(buf[i:]) 33 } 34