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Source file src/os/str.go

     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	

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