Adding upstream version 6.1.22-dfsg.upstream/6.1.22-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 197 insertions, 0 deletions

diff --git a/src/VBox/Runtime/common/string/straprintf.cpp b/src/VBox/Runtime/common/string/straprintf.cpp
new file mode 100644
index 00000000..59c12d67
--- /dev/null
+++ b/src/VBox/Runtime/common/string/straprintf.cpp
@@ -0,0 +1,197 @@
+/* $Id: straprintf.cpp $ */
+/** @file
+ * IPRT - Allocating String Formatters.
+ */
+
+/*
+ * Copyright (C) 2006-2020 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/string.h>
+#include "internal/iprt.h"
+
+#include <iprt/assert.h>
+#include <iprt/alloc.h>
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+/** strallocoutput() argument structure. */
+typedef struct STRALLOCARG
+{
+    /** Pointer to current buffer position. */
+    char       *psz;
+    /** Number of bytes left in the buffer - not including the trailing zero. */
+    size_t      cch;
+    /** Pointer to the start of the buffer. */
+    char       *pszBuffer;
+    /** The number of bytes in the buffer. */
+    size_t      cchBuffer;
+    /** Set if the buffer was allocated using RTMemRealloc(). If clear
+     * pszBuffer points to the initial stack buffer. */
+    bool        fAllocated;
+    /** Allocation tag used for statistics and such. */
+    const char *pszTag;
+} STRALLOCARG;
+/** Pointer to a strallocoutput() argument structure. */
+typedef STRALLOCARG *PSTRALLOCARG;
+
+
+/*********************************************************************************************************************************
+*   Internal Functions                                                                                                           *
+*********************************************************************************************************************************/
+static DECLCALLBACK(size_t) strallocoutput(void *pvArg, const char *pachChars, size_t cbChars);
+
+
+/**
+ * Output callback.
+ *
+ * @returns number of bytes written.
+ * @param   pvArg       Pointer to a STRBUFARG structure.
+ * @param   pachChars   Pointer to an array of utf-8 characters.
+ * @param   cbChars     Number of bytes in the character array pointed to by pachChars.
+ */
+static DECLCALLBACK(size_t) strallocoutput(void *pvArg, const char *pachChars, size_t cbChars)
+{
+    PSTRALLOCARG    pArg = (PSTRALLOCARG)pvArg;
+    if (pArg->psz)
+    {
+        /*
+         * The fast path
+         */
+        if (cbChars <= pArg->cch)
+        {
+            if (cbChars)
+            {
+                memcpy(pArg->psz, pachChars, cbChars);
+                pArg->cch -= cbChars;
+                pArg->psz += cbChars;
+            }
+            *pArg->psz = '\0';
+            return cbChars;
+        }
+
+        /*
+         * Need to (re)allocate the buffer.
+         */
+        size_t cbAdded = RT_MIN(pArg->cchBuffer, _1M);
+        if (cbAdded <= cbChars)
+            cbAdded = RT_ALIGN_Z(cbChars, _4K);
+        if (cbAdded <= _1G)
+        {
+            char *pszBuffer = (char *)RTMemReallocTag(pArg->fAllocated ? pArg->pszBuffer : NULL,
+                                                      cbAdded + pArg->cchBuffer, pArg->pszTag);
+            if (pszBuffer)
+            {
+                size_t off = pArg->psz - pArg->pszBuffer;
+                if (!pArg->fAllocated)
+                {
+                    memcpy(pszBuffer, pArg->pszBuffer, off);
+                    pArg->fAllocated = true;
+                }
+
+                pArg->pszBuffer = pszBuffer;
+                pArg->cchBuffer += cbAdded;
+                pArg->psz = pszBuffer + off;
+                pArg->cch += cbAdded;
+
+                if (cbChars)
+                {
+                    memcpy(pArg->psz, pachChars, cbChars);
+                    pArg->cch -= cbChars;
+                    pArg->psz += cbChars;
+                }
+                *pArg->psz = '\0';
+                return cbChars;
+            }
+            /* else allocation failure */
+        }
+        /* else wrap around */
+
+        /* failure */
+        pArg->psz = NULL;
+    }
+    return 0;
+}
+
+
+RTDECL(int) RTStrAPrintfVTag(char **ppszBuffer, const char *pszFormat, va_list args, const char *pszTag)
+{
+#ifdef IN_RING3
+    char            szBuf[2048];
+#else
+    char            szBuf[256];
+#endif
+    STRALLOCARG     Arg;
+    Arg.fAllocated  = false;
+    Arg.cchBuffer   = sizeof(szBuf);
+    Arg.pszBuffer   = szBuf;
+    Arg.cch         = sizeof(szBuf) - 1;
+    Arg.psz         = szBuf;
+    Arg.pszTag      = pszTag;
+    szBuf[0] = '\0';
+    int cbRet = (int)RTStrFormatV(strallocoutput, &Arg, NULL, NULL, pszFormat, args);
+    if (Arg.psz)
+    {
+        if (!Arg.fAllocated)
+        {
+            /* duplicate the string in szBuf */
+            Assert(Arg.pszBuffer == szBuf);
+            char *psz = (char *)RTMemAllocTag(cbRet + 1, pszTag);
+            if (psz)
+                memcpy(psz, szBuf, cbRet + 1);
+            *ppszBuffer = psz;
+        }
+        else
+        {
+            /* adjust the allocated buffer */
+            char *psz = (char *)RTMemReallocTag(Arg.pszBuffer, cbRet + 1, pszTag);
+            *ppszBuffer = psz ? psz : Arg.pszBuffer;
+        }
+    }
+    else
+    {
+        /* allocation error */
+        *ppszBuffer = NULL;
+        cbRet = -1;
+
+        /* free any allocated buffer */
+        if (Arg.fAllocated)
+            RTMemFree(Arg.pszBuffer);
+    }
+
+    return cbRet;
+}
+RT_EXPORT_SYMBOL(RTStrAPrintfVTag);
+
+
+RTDECL(char *) RTStrAPrintf2VTag(const char *pszFormat, va_list args, const char *pszTag)
+{
+    char *pszBuffer;
+    RTStrAPrintfVTag(&pszBuffer, pszFormat, args, pszTag);
+    return pszBuffer;
+}
+RT_EXPORT_SYMBOL(RTStrAPrintf2VTag);
+