1 files changed, 277 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/stringalloc.cpp b/src/VBox/Runtime/common/string/stringalloc.cpp
new file mode 100644
index 000000000..f21291404
--- /dev/null
+++ b/src/VBox/Runtime/common/string/stringalloc.cpp
@@ -0,0 +1,277 @@
+/* $Id: stringalloc.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
+/** @file
+ * IPRT - String Manipulation.
+ */
+
+/*
+ * Copyright (C) 2006-2007 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/alloca.h>
+#include <iprt/assert.h>
+#include <iprt/mem.h>
+#include <iprt/err.h>
+#include "internal/string.h"
+
+
+
+RTDECL(char *) RTStrAlloc(size_t cb)
+{
+    char *psz = (char *)RTMemAlloc(RT_MAX(cb, 1));
+    if (psz)
+        *psz = '\0';
+    return psz;
+}
+RT_EXPORT_SYMBOL(RTStrAlloc);
+
+
+RTDECL(int) RTStrAllocEx(char **ppsz, size_t cb)
+{
+    char *psz = *ppsz = (char *)RTMemAlloc(RT_MAX(cb, 1));
+    if (psz)
+    {
+        *psz = '\0';
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_STR_MEMORY;
+}
+RT_EXPORT_SYMBOL(RTStrAlloc);
+
+
+RTDECL(int) RTStrRealloc(char **ppsz, size_t cbNew)
+{
+    char *pszOld = *ppsz;
+    if (!cbNew)
+    {
+        RTMemFree(pszOld);
+        *ppsz = NULL;
+    }
+    else if (pszOld)
+    {
+        char *pszNew = (char *)RTMemRealloc(pszOld, cbNew);
+        if (!pszNew)
+            return VERR_NO_STR_MEMORY;
+        pszNew[cbNew - 1] = '\0';
+        *ppsz = pszNew;
+    }
+    else
+    {
+        char *pszNew = (char *)RTMemAlloc(cbNew);
+        if (!pszNew)
+            return VERR_NO_STR_MEMORY;
+        pszNew[0] = '\0';
+        pszNew[cbNew - 1] = '\0';
+        *ppsz = pszNew;
+    }
+    return VINF_SUCCESS;
+}
+
+RTDECL(void)  RTStrFree(char *pszString)
+{
+    if (pszString)
+        RTMemTmpFree(pszString);
+}
+RT_EXPORT_SYMBOL(RTStrFree);
+
+
+RTDECL(char *) RTStrDup(const char *pszString)
+{
+    AssertPtr(pszString);
+    size_t cch = strlen(pszString) + 1;
+    char *psz = (char *)RTMemAlloc(cch);
+    if (psz)
+        memcpy(psz, pszString, cch);
+    return psz;
+}
+RT_EXPORT_SYMBOL(RTStrDup);
+
+
+RTDECL(int)  RTStrDupEx(char **ppszString, const char *pszString)
+{
+    AssertPtr(ppszString);
+    AssertPtr(pszString);
+
+    size_t cch = strlen(pszString) + 1;
+    char *psz = (char *)RTMemAlloc(cch);
+    if (psz)
+    {
+        memcpy(psz, pszString, cch);
+        *ppszString = psz;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+RT_EXPORT_SYMBOL(RTStrDupEx);
+
+
+RTDECL(char *) RTStrDupN(const char *pszString, size_t cchMax)
+{
+    AssertPtr(pszString);
+    char  *pszEnd = (char *)memchr(pszString, '\0', cchMax);
+    size_t cch    = pszEnd ? (uintptr_t)pszEnd - (uintptr_t)pszString : cchMax;
+    char  *pszDst = (char *)RTMemAlloc(cch + 1);
+    if (pszDst)
+    {
+        memcpy(pszDst, pszString, cch);
+        pszDst[cch] = '\0';
+    }
+    return pszDst;
+}
+RT_EXPORT_SYMBOL(RTStrDupN);
+
+
+RTDECL(int) RTStrAAppend(char **ppsz, const char *pszAppend)
+{
+    if (!pszAppend)
+        return VINF_SUCCESS;
+    return RTStrAAppendN(ppsz, pszAppend, RTSTR_MAX);
+}
+
+
+RTDECL(int) RTStrAAppendN(char **ppsz, const char *pszAppend, size_t cchAppend)
+{
+    if (!cchAppend)
+        return VINF_SUCCESS;
+    if (cchAppend == RTSTR_MAX)
+        cchAppend = strlen(pszAppend);
+    else
+        Assert(cchAppend == RTStrNLen(pszAppend, cchAppend));
+
+    size_t const cchOrg = *ppsz ? strlen(*ppsz) : 0;
+    char *pszNew = (char *)RTMemRealloc(*ppsz, cchOrg + cchAppend + 1);
+    if (!pszNew)
+        return VERR_NO_STR_MEMORY;
+
+    memcpy(&pszNew[cchOrg], pszAppend, cchAppend);
+    pszNew[cchOrg + cchAppend] = '\0';
+
+    *ppsz = pszNew;
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(int) RTStrAAppendExNV(char **ppsz, size_t cPairs, va_list va)
+{
+    AssertPtr(ppsz);
+    if (!cPairs)
+        return VINF_SUCCESS;
+
+    /*
+     * Determin the length of each string and calc the new total.
+     */
+    struct RTStrAAppendExNVStruct
+    {
+        const char *psz;
+        size_t      cch;
+    } *paPairs = (struct RTStrAAppendExNVStruct *)alloca(cPairs * sizeof(*paPairs));
+    AssertReturn(paPairs, VERR_NO_STR_MEMORY);
+
+    size_t  cchOrg      = *ppsz ? strlen(*ppsz) : 0;
+    size_t  cchNewTotal = cchOrg;
+    for (size_t i = 0; i < cPairs; i++)
+    {
+        const char *psz = va_arg(va, const char *);
+        size_t      cch = va_arg(va, size_t);
+        AssertPtrNull(psz);
+        Assert(cch == RTSTR_MAX || cch == RTStrNLen(psz, cch));
+
+        if (cch == RTSTR_MAX)
+            cch = psz ? strlen(psz) : 0;
+        cchNewTotal += cch;
+
+        paPairs[i].cch = cch;
+        paPairs[i].psz = psz;
+    }
+    cchNewTotal++;                      /* '\0' */
+
+    /*
+     * Try reallocate the string.
+     */
+    char *pszNew = (char *)RTMemRealloc(*ppsz, cchNewTotal);
+    if (!pszNew)
+        return VERR_NO_STR_MEMORY;
+
+    /*
+     * Do the appending.
+     */
+    size_t off = cchOrg;
+    for (size_t i = 0; i < cPairs; i++)
+    {
+        memcpy(&pszNew[off], paPairs[i].psz, paPairs[i].cch);
+        off += paPairs[i].cch;
+    }
+    Assert(off + 1 == cchNewTotal);
+    pszNew[off] = '\0';
+
+    /* done */
+    *ppsz = pszNew;
+    return VINF_SUCCESS;
+}
+RT_EXPORT_SYMBOL(RTStrAAppendExNV);
+
+
+RTDECL(int) RTStrAAppendExN(char **ppsz, size_t cPairs, ...)
+{
+    va_list va;
+    va_start(va, cPairs);
+    int rc = RTStrAAppendExNV(ppsz, cPairs, va);
+    va_end(va);
+    return rc;
+}
+RT_EXPORT_SYMBOL(RTStrAAppendExN);
+
+
+RTDECL(int) RTStrATruncate(char **ppsz, size_t cchNew)
+{
+    char *pszOld = *ppsz;
+    if (!cchNew)
+    {
+        if (pszOld && *pszOld)
+        {
+            *pszOld = '\0';
+            char *pszNew = (char *)RTMemRealloc(pszOld, 1);
+            if (pszNew)
+                *ppsz = pszNew;
+        }
+    }
+    else
+    {
+        AssertPtrReturn(pszOld, VERR_OUT_OF_RANGE);
+        char *pszZero = (char *)memchr(pszOld, '\0', cchNew + 63);
+        AssertReturn(!pszZero || (size_t)(pszZero - pszOld) >= cchNew, VERR_OUT_OF_RANGE);
+        pszOld[cchNew] = '\0';
+        if (!pszZero)
+        {
+            char *pszNew = (char *)RTMemRealloc(pszOld,  cchNew + 1);
+            if (pszNew)
+                *ppsz = pszNew;
+        }
+    }
+    return VINF_SUCCESS;
+}
+RT_EXPORT_SYMBOL(RTStrATruncate);
+