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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Runtime/generic/RTFileReadAllByHandleEx-generic.cpp
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/generic/RTFileReadAllByHandleEx-generic.cpp')
-rw-r--r--src/VBox/Runtime/generic/RTFileReadAllByHandleEx-generic.cpp127
1 files changed, 127 insertions, 0 deletions
diff --git a/src/VBox/Runtime/generic/RTFileReadAllByHandleEx-generic.cpp b/src/VBox/Runtime/generic/RTFileReadAllByHandleEx-generic.cpp
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+/* $Id: RTFileReadAllByHandleEx-generic.cpp $ */
+/** @file
+ * IPRT - RTFileReadAllByHandleEx, generic implementation.
+ */
+
+/*
+ * Copyright (C) 2008-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+* Header Files *
+*********************************************************************************************************************************/
+#include <iprt/file.h>
+#include "internal/iprt.h"
+
+#include <iprt/mem.h>
+#include <iprt/assert.h>
+#include <iprt/string.h>
+#include <iprt/errcore.h>
+
+
+RTDECL(int) RTFileReadAllByHandleEx(RTFILE File, RTFOFF off, RTFOFF cbMax, uint32_t fFlags, void **ppvFile, size_t *pcbFile)
+{
+ AssertReturn(!(fFlags & ~RTFILE_RDALL_VALID_MASK), VERR_INVALID_PARAMETER);
+
+ /*
+ * Save the current offset first.
+ */
+ RTFOFF offOrg;
+ int rc = RTFileSeek(File, 0, RTFILE_SEEK_CURRENT, (uint64_t *)&offOrg);
+ if (RT_SUCCESS(rc))
+ {
+ /*
+ * Get the file size, adjust it and check that it might fit into memory.
+ */
+ RTFOFF cbFile;
+ AssertCompile(sizeof(cbFile) == sizeof(uint64_t));
+ rc = RTFileSeek(File, 0, RTFILE_SEEK_END, (uint64_t *)&cbFile);
+ if (RT_SUCCESS(rc))
+ {
+ RTFOFF cbAllocFile = cbFile > off ? cbFile - off : 0;
+ if (cbAllocFile <= cbMax)
+ { /* likely */ }
+ else if (!(fFlags & RTFILE_RDALL_F_FAIL_ON_MAX_SIZE))
+ cbAllocFile = cbMax;
+ else
+ rc = VERR_OUT_OF_RANGE;
+ if (RT_SUCCESS(rc))
+ {
+ size_t cbAllocMem = (size_t)cbAllocFile;
+ if ((RTFOFF)cbAllocMem == cbAllocFile)
+ {
+ /*
+ * Try allocate the required memory and initialize the header (hardcoded fun).
+ */
+ void *pvHdr = RTMemAlloc(cbAllocMem + 32 + (fFlags & RTFILE_RDALL_F_TRAILING_ZERO_BYTE ? 1 : 0));
+ if (pvHdr)
+ {
+ memset(pvHdr, 0xff, 32);
+ *(size_t *)pvHdr = cbAllocMem;
+
+ /*
+ * Seek and read.
+ */
+ rc = RTFileSeek(File, off, RTFILE_SEEK_BEGIN, NULL);
+ if (RT_SUCCESS(rc))
+ {
+ void *pvFile = (uint8_t *)pvHdr + 32;
+ rc = RTFileRead(File, pvFile, cbAllocMem, NULL);
+ if (RT_SUCCESS(rc))
+ {
+ if (fFlags & RTFILE_RDALL_F_TRAILING_ZERO_BYTE)
+ ((uint8_t *)pvFile)[cbAllocFile] = '\0';
+
+ /*
+ * Success - fill in the return values.
+ */
+ *ppvFile = pvFile;
+ *pcbFile = cbAllocMem;
+ }
+ }
+
+ if (RT_FAILURE(rc))
+ RTMemFree(pvHdr);
+ }
+ else
+ rc = VERR_NO_MEMORY;
+ }
+ else
+ rc = VERR_TOO_MUCH_DATA;
+ }
+ }
+ /* restore the position. */
+ RTFileSeek(File, offOrg, RTFILE_SEEK_BEGIN, NULL);
+ }
+ return rc;
+}
+RT_EXPORT_SYMBOL(RTFileReadAllByHandleEx);
+