40 lines
817 B
Go
40 lines
817 B
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Simple conversions to avoid depending on strconv.
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package os
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// itox converts val (an int) to a hexdecimal string.
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func itox(val int) string {
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if val < 0 {
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return "-" + uitox(uint(-val))
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}
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return uitox(uint(val))
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}
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const hex = "0123456789abcdef"
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// uitox converts val (a uint) to a hexdecimal string.
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func uitox(val uint) string {
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if val == 0 { // avoid string allocation
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return "0x0"
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}
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var buf [20]byte // big enough for 64bit value base 16 + 0x
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i := len(buf) - 1
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for val >= 16 {
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q := val / 16
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buf[i] = hex[val%16]
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i--
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val = q
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}
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// val < 16
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buf[i] = hex[val%16]
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i--
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buf[i] = 'x'
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i--
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buf[i] = '0'
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return string(buf[i:])
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}
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