| 1 | /* $Id: RTStrPrintHexBytes.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTStrPrintHexBytes.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2019 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include "internal/iprt.h"
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| 32 | #include <iprt/string.h>
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| 33 |
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/errcore.h>
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| 36 |
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| 37 |
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| 38 | RTDECL(int) RTStrPrintHexBytes(char *pszBuf, size_t cbBuf, void const *pv, size_t cb, uint32_t fFlags)
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| 39 | {
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| 40 | AssertReturn( !(fFlags & ~(RTSTRPRINTHEXBYTES_F_UPPER | RTSTRPRINTHEXBYTES_F_SEP_SPACE | RTSTRPRINTHEXBYTES_F_SEP_COLON))
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| 41 | && (fFlags & (RTSTRPRINTHEXBYTES_F_SEP_SPACE | RTSTRPRINTHEXBYTES_F_SEP_COLON))
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| 42 | != (RTSTRPRINTHEXBYTES_F_SEP_SPACE | RTSTRPRINTHEXBYTES_F_SEP_COLON),
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| 43 | VERR_INVALID_FLAGS);
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| 44 | AssertPtrReturn(pszBuf, VERR_INVALID_POINTER);
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| 45 | AssertReturn(cb * 2 >= cb, VERR_BUFFER_OVERFLOW);
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| 46 | char const chSep = fFlags & RTSTRPRINTHEXBYTES_F_SEP_SPACE ? ' '
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| 47 | : fFlags & RTSTRPRINTHEXBYTES_F_SEP_COLON ? ':' : '\0';
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| 48 | AssertReturn(cbBuf >= cb * (2 + (chSep != '\0')) - (chSep != '\0') + 1, VERR_BUFFER_OVERFLOW);
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| 49 | if (cb)
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| 50 | AssertPtrReturn(pv, VERR_INVALID_POINTER);
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| 51 |
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| 52 | static char const s_szHexDigitsLower[17] = "0123456789abcdef";
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| 53 | static char const s_szHexDigitsUpper[17] = "0123456789ABCDEF";
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| 54 | const char *pszHexDigits = !(fFlags & RTSTRPRINTHEXBYTES_F_UPPER) ? s_szHexDigitsLower : s_szHexDigitsUpper;
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| 55 |
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| 56 | uint8_t const *pb = (uint8_t const *)pv;
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| 57 |
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| 58 | if (!chSep)
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| 59 | {
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| 60 | while (cb-- > 0)
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| 61 | {
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| 62 | uint8_t b = *pb++;
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| 63 | *pszBuf++ = pszHexDigits[b >> 4];
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| 64 | *pszBuf++ = pszHexDigits[b & 0xf];
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| 65 | }
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| 66 | }
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| 67 | else if (cb-- > 0)
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| 68 | {
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| 69 | uint8_t b = *pb++;
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| 70 | *pszBuf++ = pszHexDigits[b >> 4];
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| 71 | *pszBuf++ = pszHexDigits[b & 0xf];
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| 72 |
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| 73 | while (cb-- > 0)
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| 74 | {
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| 75 | b = *pb++;
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| 76 | *pszBuf++ = chSep;
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| 77 | *pszBuf++ = pszHexDigits[b >> 4];
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| 78 | *pszBuf++ = pszHexDigits[b & 0xf];
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| 79 | }
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| 80 | }
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| 81 |
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| 82 | *pszBuf = '\0';
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| 83 | return VINF_SUCCESS;
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| 84 | }
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| 85 |
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