| 1 | /* $Id: RTPathCopyComponents.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTPathCountComponents
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010-2020 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/path.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 | #include <iprt/string.h>
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| 37 | #include "internal/path.h"
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| 38 |
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| 39 |
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| 40 | RTDECL(int) RTPathCopyComponents(char *pszDst, size_t cbDst, const char *pszSrc, size_t cComponents)
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| 41 | {
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| 42 | /*
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| 43 | * Quick input validation.
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| 44 | */
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| 45 | AssertPtr(pszDst);
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| 46 | AssertPtr(pszSrc);
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| 47 | if (cbDst == 0)
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| 48 | return VERR_BUFFER_OVERFLOW;
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| 49 |
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| 50 | /*
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| 51 | * Fend of the simple case where nothing is wanted.
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| 52 | */
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| 53 | if (cComponents == 0)
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| 54 | {
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| 55 | *pszDst = '\0';
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| 56 | return VINF_SUCCESS;
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| 57 | }
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| 58 |
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| 59 | /*
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| 60 | * Parse into the path until we've counted the desired number of objects
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| 61 | * or hit the end.
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| 62 | */
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| 63 | size_t off = rtPathRootSpecLen(pszSrc);
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| 64 | size_t c = off != 0;
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| 65 | while (c < cComponents && pszSrc[off])
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| 66 | {
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| 67 | c++;
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| 68 | while (!RTPATH_IS_SLASH(pszSrc[off]) && pszSrc[off])
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| 69 | off++;
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| 70 | while (RTPATH_IS_SLASH(pszSrc[off]))
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| 71 | off++;
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| 72 | }
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| 73 |
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| 74 | /*
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| 75 | * Copy up to but not including 'off'.
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| 76 | */
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| 77 | if (off >= cbDst)
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| 78 | return VERR_BUFFER_OVERFLOW;
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| 79 |
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| 80 | memcpy(pszDst, pszSrc, off);
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| 81 | pszDst[off] = '\0';
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| 82 | return VINF_SUCCESS;
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| 83 | }
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| 84 |
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