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Diffstat (limited to 'src/VBox/Runtime/common/misc/RTFileModeToFlags.cpp')
-rw-r--r--src/VBox/Runtime/common/misc/RTFileModeToFlags.cpp337
1 files changed, 337 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/misc/RTFileModeToFlags.cpp b/src/VBox/Runtime/common/misc/RTFileModeToFlags.cpp
new file mode 100644
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+++ b/src/VBox/Runtime/common/misc/RTFileModeToFlags.cpp
@@ -0,0 +1,337 @@
+/* $Id: RTFileModeToFlags.cpp $ */
+/** @file
+ * IPRT - RTFileModeToFlags.
+ */
+
+/*
+ * Copyright (C) 2013 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*******************************************************************************
+* Header Files *
+*******************************************************************************/
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/file.h>
+#include <iprt/string.h>
+#include "internal/iprt.h"
+
+
+RTR3DECL(int) RTFileModeToFlags(const char *pszMode, uint64_t *puMode)
+{
+ AssertPtrReturn(pszMode, VERR_INVALID_POINTER);
+ AssertPtrReturn(puMode, VERR_INVALID_POINTER);
+
+ int rc = VINF_SUCCESS;
+
+ const char *pszCur = pszMode;
+ uint64_t uMode = 0;
+ char chPrev = 0;
+
+ if (*pszCur == '\0')
+ return VERR_INVALID_PARAMETER;
+
+ while ( pszCur
+ && *pszCur != '\0')
+ {
+ bool fSkip = false;
+ switch (*pszCur)
+ {
+ /* Opens an existing file for writing and places the
+ * file pointer at the end of the file. The file is
+ * created if it does not exist. */
+ case 'a':
+ if ((uMode & RTFILE_O_ACTION_MASK) == 0)
+ {
+ uMode |= RTFILE_O_OPEN_CREATE
+ | RTFILE_O_WRITE
+ | RTFILE_O_APPEND;
+ }
+ else
+ rc = VERR_INVALID_PARAMETER;
+ break;
+
+ case 'b': /* Binary mode. */
+ /* Just skip as being valid. */
+ fSkip = true;
+ break;
+
+ /* Creates a file or open an existing one for
+ * writing only. The file pointer will be placed
+ * at the beginning of the file.*/
+ case 'c':
+ if ((uMode & RTFILE_O_ACTION_MASK) == 0)
+ {
+ uMode |= RTFILE_O_OPEN_CREATE
+ | RTFILE_O_WRITE;
+ }
+ else
+ rc = VERR_INVALID_PARAMETER;
+ break;
+
+ /* Opens an existing file for reading and places the
+ * file pointer at the beginning of the file. If the
+ * file does not exist an error will be returned. */
+ case 'r':
+ if ((uMode & RTFILE_O_ACTION_MASK) == 0)
+ {
+ uMode |= RTFILE_O_OPEN
+ | RTFILE_O_READ;
+ }
+ else
+ rc = VERR_INVALID_PARAMETER;
+ break;
+
+ case 't': /* Text mode. */
+ /* Just skip as being valid. */
+ fSkip = true;
+ break;
+
+ /* Creates a new file or replaces an existing one
+ * for writing. Places the file pointer at the beginning.
+ * An existing file will be truncated to 0 bytes. */
+ case 'w':
+ if ((uMode & RTFILE_O_ACTION_MASK) == 0)
+ {
+ uMode |= RTFILE_O_CREATE_REPLACE
+ | RTFILE_O_WRITE
+ | RTFILE_O_TRUNCATE;
+ }
+ else
+ rc = VERR_INVALID_PARAMETER;
+ break;
+
+ /* Creates a new file and opens it for writing. Places
+ * the file pointer at the beginning. If the file
+ * exists an error will be returned. */
+ case 'x':
+ if ((uMode & RTFILE_O_ACTION_MASK) == 0)
+ {
+ uMode |= RTFILE_O_CREATE
+ | RTFILE_O_WRITE;
+ }
+ else
+ rc = VERR_INVALID_PARAMETER;
+ break;
+
+ case '+':
+ {
+ switch (chPrev)
+ {
+ case 'a':
+ case 'c':
+ case 'w':
+ case 'x':
+ /* Also open / create file with read access. */
+ uMode |= RTFILE_O_READ;
+ break;
+
+ case 'r':
+ /* Also open / create file with write access. */
+ uMode |= RTFILE_O_WRITE;
+ break;
+
+ case 'b':
+ case 't':
+ /* Silently eat skipped parameters. */
+ fSkip = true;
+ break;
+
+ case 0: /* No previous character yet. */
+ case '+':
+ /* Eat plusses which don't belong to a command. */
+ fSkip = true;
+ break;
+
+ default:
+ rc = VERR_INVALID_PARAMETER;
+ break;
+ }
+
+ break;
+ }
+
+ default:
+ rc = VERR_INVALID_PARAMETER;
+ break;
+ }
+
+ if (RT_FAILURE(rc))
+ break;
+
+ if (!fSkip)
+ chPrev = *pszCur;
+ pszCur++;
+ }
+
+ /* No action mask set? */
+ if ( RT_SUCCESS(rc)
+ && (uMode & RTFILE_O_ACTION_MASK) == 0)
+ rc = VERR_INVALID_PARAMETER;
+
+ /** @todo Handle sharing mode. */
+ uMode |= RTFILE_O_DENY_NONE;
+
+ if (RT_SUCCESS(rc))
+ *puMode = uMode;
+
+ return rc;
+}
+RT_EXPORT_SYMBOL(RTFileModeToFlags);
+
+
+RTR3DECL(int) RTFileModeToFlagsEx(const char *pszAccess, const char *pszDisposition,
+ const char *pszSharing, uint64_t *puMode)
+{
+ AssertPtrReturn(pszAccess, VERR_INVALID_POINTER);
+ AssertPtrReturn(pszDisposition, VERR_INVALID_POINTER);
+ /* pszSharing is not used yet. */
+ AssertPtrReturn(puMode, VERR_INVALID_POINTER);
+
+ int rc = VINF_SUCCESS;
+
+ const char *pszCur = pszAccess;
+ uint64_t uMode = 0;
+ char chPrev = 0;
+
+ if (*pszCur == '\0')
+ return VERR_INVALID_PARAMETER;
+
+ /*
+ * Handle access mode.
+ */
+ while ( pszCur
+ && *pszCur != '\0')
+ {
+ bool fSkip = false;
+ switch (*pszCur)
+ {
+ case 'b': /* Binary mode. */
+ /* Just skip as being valid. */
+ fSkip = true;
+ break;
+
+ case 'r': /* Read. */
+ uMode |= RTFILE_O_READ;
+ break;
+
+ case 't': /* Text mode. */
+ /* Just skip as being valid. */
+ fSkip = true;
+ break;
+
+ case 'w': /* Write. */
+ uMode |= RTFILE_O_WRITE;
+ break;
+
+ case '+':
+ {
+ switch (chPrev)
+ {
+ case 'w':
+ /* Also use read access in write mode. */
+ uMode |= RTFILE_O_READ;
+ break;
+
+ case 'r':
+ /* Also use write access in read mode. */
+ uMode |= RTFILE_O_WRITE;
+ break;
+
+ case 'b':
+ case 't':
+ /* Silently eat skipped parameters. */
+ fSkip = true;
+ break;
+
+ case 0: /* No previous character yet. */
+ case '+':
+ /* Eat plusses which don't belong to a command. */
+ fSkip = true;
+ break;
+
+ default:
+ rc = VERR_INVALID_PARAMETER;
+ break;
+ }
+
+ break;
+ }
+
+ default:
+ rc = VERR_INVALID_PARAMETER;
+ break;
+ }
+
+ if (RT_FAILURE(rc))
+ break;
+
+ if (!fSkip)
+ chPrev = *pszCur;
+ pszCur++;
+ }
+
+ if (RT_FAILURE(rc))
+ return rc;
+
+ /*
+ * Handle disposition.
+ */
+ pszCur = pszDisposition;
+
+ /* Create a new file, always, overwrite an existing file. */
+ if (!RTStrCmp(pszCur, "ca"))
+ uMode |= RTFILE_O_CREATE_REPLACE;
+ /* Create a new file if it does not exist, fail if exist. */
+ else if (!RTStrCmp(pszCur, "ce"))
+ uMode |= RTFILE_O_CREATE;
+ /* Open existing file, create file if does not exist. */
+ else if (!RTStrCmp(pszCur, "oc"))
+ uMode |= RTFILE_O_OPEN_CREATE;
+ /* Open existing file and place the file pointer at
+ * the end of the file, if opened with write access.
+ * Create the file if does not exist. */
+ else if (!RTStrCmp(pszCur, "oa"))
+ uMode |= RTFILE_O_OPEN_CREATE | RTFILE_O_APPEND;
+ /* Open existing, fail if does not exist. */
+ else if (!RTStrCmp(pszCur, "oe"))
+ uMode |= RTFILE_O_OPEN;
+ /* Open and truncate existing, fail of not exist. */
+ else if (!RTStrCmp(pszCur, "ot"))
+ uMode |= RTFILE_O_OPEN | RTFILE_O_TRUNCATE;
+ else
+ rc = VERR_INVALID_PARAMETER;
+
+ /* No action mask set? */
+ if ( RT_SUCCESS(rc)
+ && (uMode & RTFILE_O_ACTION_MASK) == 0)
+ rc = VERR_INVALID_PARAMETER;
+
+ /** @todo Handle sharing mode. */
+ uMode |= RTFILE_O_DENY_NONE;
+
+ if (RT_SUCCESS(rc))
+ *puMode = uMode;
+
+ return rc;
+}
+RT_EXPORT_SYMBOL(RTFileModeToFlagsEx);
+
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