Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

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

1 files changed, 1605 insertions, 0 deletions

diff --git a/include/iprt/cpp/ministring.h b/include/iprt/cpp/ministring.h
new file mode 100644
index 00000000..0e70d3d9
--- /dev/null
+++ b/include/iprt/cpp/ministring.h
@@ -0,0 +1,1605 @@
+/** @file
+ * IPRT - C++ string class.
+ */
+
+/*
+ * Copyright (C) 2007-2019 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.
+ */
+
+#ifndef IPRT_INCLUDED_cpp_ministring_h
+#define IPRT_INCLUDED_cpp_ministring_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/mem.h>
+#include <iprt/string.h>
+#include <iprt/stdarg.h>
+#include <iprt/cpp/list.h>
+
+#include <new>
+
+
+/** @defgroup grp_rt_cpp_string     C++ String support
+ * @ingroup grp_rt_cpp
+ * @{
+ */
+
+/** @brief  C++ string class.
+ *
+ * This is a C++ string class that does not depend on anything else except IPRT
+ * memory management functions.  Semantics are like in std::string, except it
+ * can do a lot less.
+ *
+ * Note that RTCString does not differentiate between NULL strings
+ * and empty strings.  In other words, RTCString("") and RTCString(NULL)
+ * behave the same.  In both cases, RTCString allocates no memory, reports
+ * a zero length and zero allocated bytes for both, and returns an empty
+ * C-style string from c_str().
+ *
+ * @note    RTCString ASSUMES that all strings it deals with are valid UTF-8.
+ *          The caller is responsible for not breaking this assumption.
+ */
+#ifdef VBOX
+ /** @remarks Much of the code in here used to be in com::Utf8Str so that
+  *          com::Utf8Str can now derive from RTCString and only contain code
+  *          that is COM-specific, such as com::Bstr conversions.  Compared to
+  *          the old Utf8Str though, RTCString always knows the length of its
+  *          member string and the size of the buffer so it can use memcpy()
+  *          instead of strdup().
+  */
+#endif
+class RT_DECL_CLASS RTCString
+{
+public:
+    /**
+     * Creates an empty string that has no memory allocated.
+     */
+    RTCString()
+        : m_psz(NULL),
+          m_cch(0),
+          m_cbAllocated(0)
+    {
+    }
+
+    /**
+     * Creates a copy of another RTCString.
+     *
+     * This allocates s.length() + 1 bytes for the new instance, unless s is empty.
+     *
+     * @param   a_rSrc          The source string.
+     *
+     * @throws  std::bad_alloc
+     */
+    RTCString(const RTCString &a_rSrc)
+    {
+        copyFromN(a_rSrc.m_psz, a_rSrc.m_cch);
+    }
+
+    /**
+     * Creates a copy of a C-style string.
+     *
+     * This allocates strlen(pcsz) + 1 bytes for the new instance, unless s is empty.
+     *
+     * @param   pcsz            The source string.
+     *
+     * @throws  std::bad_alloc
+     */
+    RTCString(const char *pcsz)
+    {
+        copyFromN(pcsz, pcsz ? strlen(pcsz) : 0);
+    }
+
+    /**
+     * Create a partial copy of another RTCString.
+     *
+     * @param   a_rSrc          The source string.
+     * @param   a_offSrc        The byte offset into the source string.
+     * @param   a_cchSrc        The max number of chars (encoded UTF-8 bytes)
+     *                          to copy from the source string.
+     */
+    RTCString(const RTCString &a_rSrc, size_t a_offSrc, size_t a_cchSrc = npos)
+    {
+        if (a_offSrc < a_rSrc.m_cch)
+            copyFromN(&a_rSrc.m_psz[a_offSrc], RT_MIN(a_cchSrc, a_rSrc.m_cch - a_offSrc));
+        else
+        {
+            m_psz = NULL;
+            m_cch = 0;
+            m_cbAllocated = 0;
+        }
+    }
+
+    /**
+     * Create a partial copy of a C-style string.
+     *
+     * @param   a_pszSrc        The source string (UTF-8).
+     * @param   a_cchSrc        The max number of chars (encoded UTF-8 bytes)
+     *                          to copy from the source string.  This must not
+     *                          be '0' as the compiler could easily mistake
+     *                          that for the va_list constructor.
+     */
+    RTCString(const char *a_pszSrc, size_t a_cchSrc)
+    {
+        size_t cchMax = a_pszSrc ? RTStrNLen(a_pszSrc, a_cchSrc) : 0;
+        copyFromN(a_pszSrc, RT_MIN(a_cchSrc, cchMax));
+    }
+
+    /**
+     * Create a string containing @a a_cTimes repetitions of the character @a
+     * a_ch.
+     *
+     * @param   a_cTimes        The number of times the character is repeated.
+     * @param   a_ch            The character to fill the string with.
+     */
+    RTCString(size_t a_cTimes, char a_ch)
+        : m_psz(NULL),
+          m_cch(0),
+          m_cbAllocated(0)
+    {
+        Assert((unsigned)a_ch < 0x80);
+        if (a_cTimes)
+        {
+            reserve(a_cTimes + 1);
+            memset(m_psz, a_ch, a_cTimes);
+            m_psz[a_cTimes] = '\0';
+            m_cch = a_cTimes;
+        }
+    }
+
+    /**
+     * Create a new string given the format string and its arguments.
+     *
+     * @param   a_pszFormat     Pointer to the format string (UTF-8),
+     *                          @see pg_rt_str_format.
+     * @param   a_va            Argument vector containing the arguments
+     *                          specified by the format string.
+     * @sa      printfV
+     * @remarks Not part of std::string.
+     */
+    RTCString(const char *a_pszFormat, va_list a_va) RT_IPRT_FORMAT_ATTR(1, 0)
+        : m_psz(NULL),
+          m_cch(0),
+          m_cbAllocated(0)
+    {
+        printfV(a_pszFormat, a_va);
+    }
+
+    /**
+     * Destructor.
+     */
+    virtual ~RTCString()
+    {
+        cleanup();
+    }
+
+    /**
+     * String length in bytes.
+     *
+     * Returns the length of the member string in bytes, which is equal to strlen(c_str()).
+     * In other words, this does not count unicode codepoints; use utf8length() for that.
+     * The byte length is always cached so calling this is cheap and requires no
+     * strlen() invocation.
+     *
+     * @returns m_cbLength.
+     */
+    size_t length() const
+    {
+        return m_cch;
+    }
+
+    /**
+     * String length in unicode codepoints.
+     *
+     * As opposed to length(), which returns the length in bytes, this counts
+     * the number of unicode codepoints.  This is *not* cached so calling this
+     * is expensive.
+     *
+     * @returns Number of codepoints in the member string.
+     */
+    size_t uniLength() const
+    {
+        return m_psz ? RTStrUniLen(m_psz) : 0;
+    }
+
+    /**
+     * The allocated buffer size (in bytes).
+     *
+     * Returns the number of bytes allocated in the internal string buffer, which is
+     * at least length() + 1 if length() > 0; for an empty string, this returns 0.
+     *
+     * @returns m_cbAllocated.
+     */
+    size_t capacity() const
+    {
+        return m_cbAllocated;
+    }
+
+    /**
+     * Make sure at that least cb of buffer space is reserved.
+     *
+     * Requests that the contained memory buffer have at least cb bytes allocated.
+     * This may expand or shrink the string's storage, but will never truncate the
+     * contained string.  In other words, cb will be ignored if it's smaller than
+     * length() + 1.
+     *
+     * @param   cb              New minimum size (in bytes) of member memory buffer.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     */
+    void reserve(size_t cb)
+    {
+        if (   (   cb != m_cbAllocated
+                && cb > m_cch + 1)
+            || (   m_psz == NULL
+                && cb > 0))
+        {
+            int rc = RTStrRealloc(&m_psz, cb);
+            if (RT_SUCCESS(rc))
+                m_cbAllocated = cb;
+#ifdef RT_EXCEPTIONS_ENABLED
+            else
+                throw std::bad_alloc();
+#endif
+        }
+    }
+
+    /**
+     * A C like version of the reserve method, i.e. return code instead of throw.
+     *
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     * @param   cb              New minimum size (in bytes) of member memory buffer.
+     */
+    int reserveNoThrow(size_t cb) RT_NOEXCEPT
+    {
+        if (   (   cb != m_cbAllocated
+                && cb > m_cch + 1)
+            || (   m_psz == NULL
+                && cb > 0))
+        {
+            int rc = RTStrRealloc(&m_psz, cb);
+            if (RT_SUCCESS(rc))
+                m_cbAllocated = cb;
+            else
+                return rc;
+        }
+        return VINF_SUCCESS;
+    }
+
+    /**
+     * Deallocates all memory.
+     */
+    inline void setNull()
+    {
+        cleanup();
+    }
+
+    RTMEMEF_NEW_AND_DELETE_OPERATORS();
+
+    /**
+     * Assigns a copy of pcsz to @a this.
+     *
+     * @param   pcsz            The source string.
+     *
+     * @throws  std::bad_alloc  On allocation failure.  The object is left describing
+     *             a NULL string.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &operator=(const char *pcsz)
+    {
+        if (m_psz != pcsz)
+        {
+            cleanup();
+            copyFromN(pcsz, pcsz ? strlen(pcsz) : 0);
+        }
+        return *this;
+    }
+
+    /**
+     * Assigns a copy of s to @a this.
+     *
+     * @param   s               The source string.
+     *
+     * @throws  std::bad_alloc  On allocation failure.  The object is left describing
+     *             a NULL string.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &operator=(const RTCString &s)
+    {
+        if (this != &s)
+        {
+            cleanup();
+            copyFromN(s.m_psz, s.m_cch);
+        }
+        return *this;
+    }
+
+    /**
+     * Assigns a copy of another RTCString.
+     *
+     * @param   a_rSrc          Reference to the source string.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     */
+    RTCString &assign(const RTCString &a_rSrc);
+
+    /**
+     * Assigns a copy of another RTCString.
+     *
+     * @param   a_rSrc          Reference to the source string.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int assignNoThrow(const RTCString &a_rSrc) RT_NOEXCEPT;
+
+    /**
+     * Assigns a copy of a C-style string.
+     *
+     * @param   a_pszSrc        Pointer to the C-style source string.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     * @remarks ASSUMES valid
+     */
+    RTCString &assign(const char *a_pszSrc);
+
+    /**
+     * Assigns a copy of a C-style string.
+     *
+     * @param   a_pszSrc        Pointer to the C-style source string.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     * @remarks ASSUMES valid
+     */
+    int assignNoThrow(const char *a_pszSrc) RT_NOEXCEPT;
+
+    /**
+     * Assigns a partial copy of another RTCString.
+     *
+     * @param   a_rSrc          The source string.
+     * @param   a_offSrc        The byte offset into the source string.
+     * @param   a_cchSrc        The max number of chars (encoded UTF-8 bytes)
+     *                          to copy from the source string.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     */
+    RTCString &assign(const RTCString &a_rSrc, size_t a_offSrc, size_t a_cchSrc = npos);
+
+    /**
+     * Assigns a partial copy of another RTCString.
+     *
+     * @param   a_rSrc          The source string.
+     * @param   a_offSrc        The byte offset into the source string.
+     * @param   a_cchSrc        The max number of chars (encoded UTF-8 bytes)
+     *                          to copy from the source string.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int assignNoThrow(const RTCString &a_rSrc, size_t a_offSrc, size_t a_cchSrc = npos) RT_NOEXCEPT;
+
+    /**
+     * Assigns a partial copy of a C-style string.
+     *
+     * @param   a_pszSrc        The source string (UTF-8).
+     * @param   a_cchSrc        The max number of chars (encoded UTF-8 bytes)
+     *                          to copy from the source string.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     */
+    RTCString &assign(const char *a_pszSrc, size_t a_cchSrc);
+
+    /**
+     * Assigns a partial copy of a C-style string.
+     *
+     * @param   a_pszSrc        The source string (UTF-8).
+     * @param   a_cchSrc        The max number of chars (encoded UTF-8 bytes)
+     *                          to copy from the source string.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int assignNoThrow(const char *a_pszSrc, size_t a_cchSrc) RT_NOEXCEPT;
+
+    /**
+     * Assigs a string containing @a a_cTimes repetitions of the character @a a_ch.
+     *
+     * @param   a_cTimes        The number of times the character is repeated.
+     * @param   a_ch            The character to fill the string with.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     */
+    RTCString &assign(size_t a_cTimes, char a_ch);
+
+    /**
+     * Assigs a string containing @a a_cTimes repetitions of the character @a a_ch.
+     *
+     * @param   a_cTimes        The number of times the character is repeated.
+     * @param   a_ch            The character to fill the string with.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int assignNoThrow(size_t a_cTimes, char a_ch) RT_NOEXCEPT;
+
+    /**
+     * Assigns the output of the string format operation (RTStrPrintf).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   ...             Ellipsis containing the arguments specified by
+     *                          the format string.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &printf(const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(1, 2);
+
+    /**
+     * Assigns the output of the string format operation (RTStrPrintf).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   ...             Ellipsis containing the arguments specified by
+     *                          the format string.
+     *
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int printfNoThrow(const char *pszFormat, ...) RT_NOEXCEPT RT_IPRT_FORMAT_ATTR(1, 2);
+
+    /**
+     * Assigns the output of the string format operation (RTStrPrintfV).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   va              Argument vector containing the arguments
+     *                          specified by the format string.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &printfV(const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(1, 0);
+
+    /**
+     * Assigns the output of the string format operation (RTStrPrintfV).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   va              Argument vector containing the arguments
+     *                          specified by the format string.
+     *
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int printfVNoThrow(const char *pszFormat, va_list va) RT_NOEXCEPT RT_IPRT_FORMAT_ATTR(1, 0);
+
+    /**
+     * Appends the string @a that to @a rThat.
+     *
+     * @param   rThat            The string to append.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     * @returns Reference to the object.
+     */
+    RTCString &append(const RTCString &rThat);
+
+    /**
+     * Appends the string @a that to @a rThat.
+     *
+     * @param   rThat            The string to append.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int appendNoThrow(const RTCString &rThat) RT_NOEXCEPT;
+
+    /**
+     * Appends the string @a pszSrc to @a this.
+     *
+     * @param   pszSrc          The C-style string to append.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     * @returns Reference to the object.
+     */
+    RTCString &append(const char *pszSrc);
+
+    /**
+     * Appends the string @a pszSrc to @a this.
+     *
+     * @param   pszSrc          The C-style string to append.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int appendNoThrow(const char *pszSrc) RT_NOEXCEPT;
+
+    /**
+     * Appends the a substring from @a rThat to @a this.
+     *
+     * @param   rThat           The string to append a substring from.
+     * @param   offStart        The start of the substring to append (byte offset,
+     *                          not codepoint).
+     * @param   cchMax          The maximum number of bytes to append.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     * @returns Reference to the object.
+     */
+    RTCString &append(const RTCString &rThat, size_t offStart, size_t cchMax = RTSTR_MAX);
+
+    /**
+     * Appends the a substring from @a rThat to @a this.
+     *
+     * @param   rThat           The string to append a substring from.
+     * @param   offStart        The start of the substring to append (byte offset,
+     *                          not codepoint).
+     * @param   cchMax          The maximum number of bytes to append.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int appendNoThrow(const RTCString &rThat, size_t offStart, size_t cchMax = RTSTR_MAX) RT_NOEXCEPT;
+
+    /**
+     * Appends the first @a cchMax chars from string @a pszThat to @a this.
+     *
+     * @param   pszThat         The C-style string to append.
+     * @param   cchMax          The maximum number of bytes to append.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     * @returns Reference to the object.
+     */
+    RTCString &append(const char *pszThat, size_t cchMax);
+
+    /**
+     * Appends the first @a cchMax chars from string @a pszThat to @a this.
+     *
+     * @param   pszThat         The C-style string to append.
+     * @param   cchMax          The maximum number of bytes to append.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int appendNoThrow(const char *pszThat, size_t cchMax) RT_NOEXCEPT;
+
+    /**
+     * Appends the given character to @a this.
+     *
+     * @param   ch              The character to append.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     * @returns Reference to the object.
+     */
+    RTCString &append(char ch);
+
+    /**
+     * Appends the given character to @a this.
+     *
+     * @param   ch              The character to append.
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int appendNoThrow(char ch) RT_NOEXCEPT;
+
+    /**
+     * Appends the given unicode code point to @a this.
+     *
+     * @param   uc              The unicode code point to append.
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     * @returns Reference to the object.
+     */
+    RTCString &appendCodePoint(RTUNICP uc);
+
+    /**
+     * Appends the given unicode code point to @a this.
+     *
+     * @param   uc              The unicode code point to append.
+     * @returns VINF_SUCCESS, VERR_INVALID_UTF8_ENCODING or VERR_NO_STRING_MEMORY.
+     */
+    int appendCodePointNoThrow(RTUNICP uc) RT_NOEXCEPT;
+
+    /**
+     * Appends the output of the string format operation (RTStrPrintf).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   ...             Ellipsis containing the arguments specified by
+     *                          the format string.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &appendPrintf(const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(1, 2);
+
+    /**
+     * Appends the output of the string format operation (RTStrPrintf).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   ...             Ellipsis containing the arguments specified by
+     *                          the format string.
+     *
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int appendPrintfNoThrow(const char *pszFormat, ...) RT_NOEXCEPT RT_IPRT_FORMAT_ATTR(1, 2);
+
+    /**
+     * Appends the output of the string format operation (RTStrPrintfV).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   va              Argument vector containing the arguments
+     *                          specified by the format string.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &appendPrintfV(const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(1, 0);
+
+    /**
+     * Appends the output of the string format operation (RTStrPrintfV).
+     *
+     * @param   pszFormat       Pointer to the format string,
+     *                          @see pg_rt_str_format.
+     * @param   va              Argument vector containing the arguments
+     *                          specified by the format string.
+     *
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     */
+    int appendPrintfVNoThrow(const char *pszFormat, va_list va) RT_NOEXCEPT RT_IPRT_FORMAT_ATTR(1, 0);
+
+    /**
+     * Shortcut to append(), RTCString variant.
+     *
+     * @param   rThat           The string to append.
+     * @returns Reference to the object.
+     */
+    RTCString &operator+=(const RTCString &rThat)
+    {
+        return append(rThat);
+    }
+
+    /**
+     * Shortcut to append(), const char* variant.
+     *
+     * @param   pszThat         The C-style string to append.
+     * @returns                 Reference to the object.
+     */
+    RTCString &operator+=(const char *pszThat)
+    {
+        return append(pszThat);
+    }
+
+    /**
+     * Shortcut to append(), char variant.
+     *
+     * @param ch                The character to append.
+     *
+     * @returns                 Reference to the object.
+     */
+    RTCString &operator+=(char ch)
+    {
+        return append(ch);
+    }
+
+    /**
+     * Converts the member string to upper case.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &toUpper() RT_NOEXCEPT
+    {
+        if (length())
+        {
+            /* Folding an UTF-8 string may result in a shorter encoding (see
+               testcase), so recalculate the length afterwards. */
+            ::RTStrToUpper(m_psz);
+            size_t cchNew = strlen(m_psz);
+            Assert(cchNew <= m_cch);
+            m_cch = cchNew;
+        }
+        return *this;
+    }
+
+    /**
+     * Converts the member string to lower case.
+     *
+     * @returns Reference to the object.
+     */
+    RTCString &toLower() RT_NOEXCEPT
+    {
+        if (length())
+        {
+            /* Folding an UTF-8 string may result in a shorter encoding (see
+               testcase), so recalculate the length afterwards. */
+            ::RTStrToLower(m_psz);
+            size_t cchNew = strlen(m_psz);
+            Assert(cchNew <= m_cch);
+            m_cch = cchNew;
+        }
+        return *this;
+    }
+
+    /**
+     * Erases a sequence from the string.
+     *
+     * @returns Reference to the object.
+     * @param   offStart        Where in @a this string to start erasing.
+     * @param   cchLength       How much following @a offStart to erase.
+     */
+    RTCString &erase(size_t offStart = 0, size_t cchLength = npos) RT_NOEXCEPT;
+
+    /**
+     * Replaces a span of @a this string with a replacement string.
+     *
+     * @returns Reference to the object.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   rStrReplacement The replacement string.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @note    Non-standard behaviour if offStart is beyond the end of the string.
+     *          No change will occure and strict builds hits a debug assertion.
+     */
+    RTCString &replace(size_t offStart, size_t cchLength, const RTCString &rStrReplacement);
+
+    /**
+     * Replaces a span of @a this string with a replacement string.
+     *
+     * @returns VINF_SUCCESS, VERR_OUT_OF_RANGE or VERR_NO_STRING_MEMORY.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   rStrReplacement The replacement string.
+     */
+    int replaceNoThrow(size_t offStart, size_t cchLength, const RTCString &rStrReplacement) RT_NOEXCEPT;
+
+    /**
+     * Replaces a span of @a this string with a replacement substring.
+     *
+     * @returns Reference to the object.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   rStrReplacement The string from which a substring is taken.
+     * @param   offReplacement  The offset into @a rStrReplacement where the
+     *                          replacement substring starts.
+     * @param   cchReplacement   The maximum length of the replacement substring.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @note    Non-standard behaviour if offStart or offReplacement is beyond the
+     *          end of the repective strings.  No change is made in the former case,
+     *          while we consider it an empty string in the latter.  In both
+     *          situation a debug assertion is raised in strict builds.
+     */
+    RTCString &replace(size_t offStart, size_t cchLength, const RTCString &rStrReplacement,
+                       size_t offReplacement, size_t cchReplacement);
+
+    /**
+     * Replaces a span of @a this string with a replacement substring.
+     *
+     * @returns VINF_SUCCESS, VERR_OUT_OF_RANGE or VERR_NO_STRING_MEMORY.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   rStrReplacement The string from which a substring is taken.
+     * @param   offReplacement  The offset into @a rStrReplacement where the
+     *                          replacement substring starts.
+     * @param   cchReplacement   The maximum length of the replacement substring.
+     */
+    int replaceNoThrow(size_t offStart, size_t cchLength, const RTCString &rStrReplacement,
+                       size_t offReplacement, size_t cchReplacement) RT_NOEXCEPT;
+
+    /**
+     * Replaces a span of @a this string with the replacement string.
+     *
+     * @returns Reference to the object.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   pszReplacement  The replacement string.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @note    Non-standard behaviour if offStart is beyond the end of the string.
+     *          No change will occure and strict builds hits a debug assertion.
+     */
+    RTCString &replace(size_t offStart, size_t cchLength, const char *pszReplacement);
+
+    /**
+     * Replaces a span of @a this string with the replacement string.
+     *
+     * @returns VINF_SUCCESS, VERR_OUT_OF_RANGE or VERR_NO_STRING_MEMORY.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   pszReplacement  The replacement string.
+     */
+    int replaceNoThrow(size_t offStart, size_t cchLength, const char *pszReplacement) RT_NOEXCEPT;
+
+    /**
+     * Replaces a span of @a this string with the replacement string.
+     *
+     * @returns Reference to the object.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   pszReplacement  The replacement string.
+     * @param   cchReplacement  How much of @a pszReplacement to use at most.  If a
+     *                          zero terminator is found before reaching this value,
+     *                          we'll stop there.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     * @note    Non-standard behaviour if offStart is beyond the end of the string.
+     *          No change will occure and strict builds hits a debug assertion.
+     */
+    RTCString &replace(size_t offStart, size_t cchLength, const char *pszReplacement, size_t cchReplacement);
+
+    /**
+     * Replaces a span of @a this string with the replacement string.
+     *
+     * @returns VINF_SUCCESS, VERR_OUT_OF_RANGE or VERR_NO_STRING_MEMORY.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   pszReplacement  The replacement string.
+     * @param   cchReplacement  How much of @a pszReplacement to use at most.  If a
+     *                          zero terminator is found before reaching this value,
+     *                          we'll stop there.
+     */
+    int replaceNoThrow(size_t offStart, size_t cchLength, const char *pszReplacement, size_t cchReplacement) RT_NOEXCEPT;
+
+    /**
+     * Index operator.
+     *
+     * Returns the byte at the given index, or a null byte if the index is not
+     * smaller than length().  This does _not_ count codepoints but simply points
+     * into the member C-style string.
+     *
+     * @param   i       The index into the string buffer.
+     * @returns char at the index or null.
+     */
+    inline char operator[](size_t i) const RT_NOEXCEPT
+    {
+        if (i < length())
+            return m_psz[i];
+        return '\0';
+    }
+
+    /**
+     * Returns the contained string as a const C-style string pointer.
+     *
+     * This never returns NULL; if the string is empty, this returns a pointer to
+     * static null byte.
+     *
+     * @returns const pointer to C-style string.
+     */
+    inline const char *c_str() const RT_NOEXCEPT
+    {
+        return (m_psz) ? m_psz : "";
+    }
+
+    /**
+     * Returns a non-const raw pointer that allows to modify the string directly.
+     * As opposed to c_str() and raw(), this DOES return NULL for an empty string
+     * because we cannot return a non-const pointer to a static "" global.
+     *
+     * @warning
+     *      -# Be sure not to modify data beyond the allocated memory! Call
+     *         capacity() to find out how large that buffer is.
+     *      -# After any operation that modifies the length of the string,
+     *         you _must_ call RTCString::jolt(), or subsequent copy operations
+     *         may go nowhere.  Better not use mutableRaw() at all.
+     */
+    char *mutableRaw() RT_NOEXCEPT
+    {
+        return m_psz;
+    }
+
+    /**
+     * Clean up after using mutableRaw.
+     *
+     * Intended to be called after something has messed with the internal string
+     * buffer (e.g. after using mutableRaw() or Utf8Str::asOutParam()).  Resets the
+     * internal lengths correctly.  Otherwise subsequent copy operations may go
+     * nowhere.
+     */
+    void jolt() RT_NOEXCEPT
+    {
+        if (m_psz)
+        {
+            m_cch = strlen(m_psz);
+            m_cbAllocated = m_cch + 1; /* (Required for the Utf8Str::asOutParam case) */
+        }
+        else
+        {
+            m_cch = 0;
+            m_cbAllocated = 0;
+        }
+    }
+
+    /**
+     * Returns @c true if the member string has no length.
+     *
+     * This is @c true for instances created from both NULL and "" input
+     * strings.
+     *
+     * This states nothing about how much memory might be allocated.
+     *
+     * @returns @c true if empty, @c false if not.
+     */
+    bool isEmpty() const RT_NOEXCEPT
+    {
+        return length() == 0;
+    }
+
+    /**
+     * Returns @c false if the member string has no length.
+     *
+     * This is @c false for instances created from both NULL and "" input
+     * strings.
+     *
+     * This states nothing about how much memory might be allocated.
+     *
+     * @returns @c false if empty, @c true if not.
+     */
+    bool isNotEmpty() const RT_NOEXCEPT
+    {
+        return length() != 0;
+    }
+
+    /** Case sensitivity selector. */
+    enum CaseSensitivity
+    {
+        CaseSensitive,
+        CaseInsensitive
+    };
+
+    /**
+     * Compares the member string to a C-string.
+     *
+     * @param   pcszThat    The string to compare with.
+     * @param   cs          Whether comparison should be case-sensitive.
+     * @returns 0 if equal, negative if this is smaller than @a pcsz, positive
+     *          if larger.
+     */
+    int compare(const char *pcszThat, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT
+    {
+        /* This klugde is for m_cch=0 and m_psz=NULL.  pcsz=NULL and psz=""
+           are treated the same way so that str.compare(str2.c_str()) works. */
+        if (length() == 0)
+            return pcszThat == NULL || *pcszThat == '\0' ? 0 : -1;
+
+        if (cs == CaseSensitive)
+            return ::RTStrCmp(m_psz, pcszThat);
+        return ::RTStrICmp(m_psz, pcszThat);
+    }
+
+    /**
+     * Compares the member string to another RTCString.
+     *
+     * @param   rThat       The string to compare with.
+     * @param   cs          Whether comparison should be case-sensitive.
+     * @returns 0 if equal, negative if this is smaller than @a pcsz, positive
+     *          if larger.
+     */
+    int compare(const RTCString &rThat, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT
+    {
+        if (cs == CaseSensitive)
+            return ::RTStrCmp(m_psz, rThat.m_psz);
+        return ::RTStrICmp(m_psz, rThat.m_psz);
+    }
+
+    /**
+     * Compares the two strings.
+     *
+     * @returns true if equal, false if not.
+     * @param   rThat    The string to compare with.
+     */
+    bool equals(const RTCString &rThat) const RT_NOEXCEPT
+    {
+        return rThat.length() == length()
+            && (   length() == 0
+                || memcmp(rThat.m_psz, m_psz, length()) == 0);
+    }
+
+    /**
+     * Compares the two strings.
+     *
+     * @returns true if equal, false if not.
+     * @param   pszThat The string to compare with.
+     */
+    bool equals(const char *pszThat) const RT_NOEXCEPT
+    {
+        /* This klugde is for m_cch=0 and m_psz=NULL.  pcsz=NULL and psz=""
+           are treated the same way so that str.equals(str2.c_str()) works. */
+        if (length() == 0)
+            return pszThat == NULL || *pszThat == '\0';
+        return RTStrCmp(pszThat, m_psz) == 0;
+    }
+
+    /**
+     * Compares the two strings ignoring differences in case.
+     *
+     * @returns true if equal, false if not.
+     * @param   that    The string to compare with.
+     */
+    bool equalsIgnoreCase(const RTCString &that) const RT_NOEXCEPT
+    {
+        /* Unfolded upper and lower case characters may require different
+           amount of encoding space, so the length optimization doesn't work. */
+        return RTStrICmp(that.m_psz, m_psz) == 0;
+    }
+
+    /**
+     * Compares the two strings ignoring differences in case.
+     *
+     * @returns true if equal, false if not.
+     * @param   pszThat The string to compare with.
+     */
+    bool equalsIgnoreCase(const char *pszThat) const RT_NOEXCEPT
+    {
+        /* This klugde is for m_cch=0 and m_psz=NULL.  pcsz=NULL and psz=""
+           are treated the same way so that str.equalsIgnoreCase(str2.c_str()) works. */
+        if (length() == 0)
+            return pszThat == NULL || *pszThat == '\0';
+        return RTStrICmp(pszThat, m_psz) == 0;
+    }
+
+    /** @name Comparison operators.
+     * @{  */
+    bool operator==(const RTCString &that) const { return equals(that); }
+    bool operator!=(const RTCString &that) const { return !equals(that); }
+    bool operator<( const RTCString &that) const { return compare(that) < 0; }
+    bool operator>( const RTCString &that) const { return compare(that) > 0; }
+
+    bool operator==(const char *pszThat) const    { return equals(pszThat); }
+    bool operator!=(const char *pszThat) const    { return !equals(pszThat); }
+    bool operator<( const char *pszThat) const    { return compare(pszThat) < 0; }
+    bool operator>( const char *pszThat) const    { return compare(pszThat) > 0; }
+    /** @} */
+
+    /** Max string offset value.
+     *
+     * When returned by a method, this indicates failure.  When taken as input,
+     * typically a default, it means all the way to the string terminator.
+     */
+    static const size_t npos;
+
+    /**
+     * Find the given substring.
+     *
+     * Looks for @a pszNeedle in @a this starting at @a offStart and returns its
+     * position as a byte (not codepoint) offset, counting from the beginning of
+     * @a this as 0.
+     *
+     * @param   pszNeedle       The substring to find.
+     * @param   offStart        The (byte) offset into the string buffer to start
+     *                          searching.
+     *
+     * @returns 0 based position of pszNeedle. npos if not found.
+     */
+    size_t find(const char *pszNeedle, size_t offStart = 0) const RT_NOEXCEPT;
+
+    /**
+     * Find the given substring.
+     *
+     * Looks for @a pStrNeedle in @a this starting at @a offStart and returns its
+     * position as a byte (not codepoint) offset, counting from the beginning of
+     * @a this as 0.
+     *
+     * @param   pStrNeedle      The substring to find.
+     * @param   offStart        The (byte) offset into the string buffer to start
+     *                          searching.
+     *
+     * @returns 0 based position of pStrNeedle. npos if not found or pStrNeedle is
+     *          NULL or an empty string.
+     */
+    size_t find(const RTCString *pStrNeedle, size_t offStart = 0) const RT_NOEXCEPT;
+
+    /**
+     * Find the given substring.
+     *
+     * Looks for @a rStrNeedle in @a this starting at @a offStart and returns its
+     * position as a byte (not codepoint) offset, counting from the beginning of
+     * @a this as 0.
+     *
+     * @param   rStrNeedle      The substring to find.
+     * @param   offStart        The (byte) offset into the string buffer to start
+     *                          searching.
+     *
+     * @returns 0 based position of pStrNeedle. npos if not found or pStrNeedle is
+     *          NULL or an empty string.
+     */
+    size_t find(const RTCString &rStrNeedle, size_t offStart = 0) const RT_NOEXCEPT;
+
+    /**
+     * Find the given character (byte).
+     *
+     * @returns 0 based position of chNeedle. npos if not found or pStrNeedle is
+     *          NULL or an empty string.
+     * @param   chNeedle        The character (byte) to find.
+     * @param   offStart        The (byte) offset into the string buffer to start
+     *                          searching.  Default is start of the string.
+     *
+     * @note    This searches for a C character value, not a codepoint.  Use the
+     *          string version to locate codepoints above U+7F.
+     */
+    size_t find(char chNeedle, size_t offStart = 0) const RT_NOEXCEPT;
+
+    /**
+     * Replaces all occurences of cFind with cReplace in the member string.
+     * In order not to produce invalid UTF-8, the characters must be ASCII
+     * values less than 128; this is not verified.
+     *
+     * @param   chFind      Character to replace. Must be ASCII < 128.
+     * @param   chReplace   Character to replace cFind with. Must be ASCII < 128.
+     */
+    void findReplace(char chFind, char chReplace) RT_NOEXCEPT;
+
+    /**
+     * Count the occurences of the specified character in the string.
+     *
+     * @param   ch          What to search for. Must be ASCII < 128.
+     * @remarks QString::count
+     */
+    size_t count(char ch) const RT_NOEXCEPT;
+
+    /**
+     * Count the occurences of the specified sub-string in the string.
+     *
+     * @param   psz         What to search for.
+     * @param   cs          Case sensitivity selector.
+     * @remarks QString::count
+     */
+    size_t count(const char *psz, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Count the occurences of the specified sub-string in the string.
+     *
+     * @param   pStr        What to search for.
+     * @param   cs          Case sensitivity selector.
+     * @remarks QString::count
+     */
+    size_t count(const RTCString *pStr, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Strips leading and trailing spaces.
+     *
+     * @returns this
+     */
+    RTCString &strip() RT_NOEXCEPT;
+
+    /**
+     * Strips leading spaces.
+     *
+     * @returns this
+     */
+    RTCString &stripLeft() RT_NOEXCEPT;
+
+    /**
+     * Strips trailing spaces.
+     *
+     * @returns this
+     */
+    RTCString &stripRight() RT_NOEXCEPT;
+
+    /**
+     * Returns a substring of @a this as a new Utf8Str.
+     *
+     * Works exactly like its equivalent in std::string. With the default
+     * parameters "0" and "npos", this always copies the entire string. The
+     * "pos" and "n" arguments represent bytes; it is the caller's responsibility
+     * to ensure that the offsets do not copy invalid UTF-8 sequences. When
+     * used in conjunction with find() and length(), this will work.
+     *
+     * @param   pos             Index of first byte offset to copy from @a this,
+     *                          counting from 0.
+     * @param   n               Number of bytes to copy, starting with the one at "pos".
+     *                          The copying will stop if the null terminator is encountered before
+     *                          n bytes have been copied.
+     */
+    RTCString substr(size_t pos = 0, size_t n = npos) const
+    {
+        return RTCString(*this, pos, n);
+    }
+
+    /**
+     * Returns a substring of @a this as a new Utf8Str. As opposed to substr(), this
+     * variant takes codepoint offsets instead of byte offsets.
+     *
+     * @param   pos             Index of first unicode codepoint to copy from
+     *                          @a this, counting from 0.
+     * @param   n               Number of unicode codepoints to copy, starting with
+     *                          the one at "pos".  The copying will stop if the null
+     *                          terminator is encountered before n codepoints have
+     *                          been copied.
+     */
+    RTCString substrCP(size_t pos = 0, size_t n = npos) const;
+
+    /**
+     * Returns true if @a this ends with @a that.
+     *
+     * @param   that    Suffix to test for.
+     * @param   cs      Case sensitivity selector.
+     * @returns true if match, false if mismatch.
+     */
+    bool endsWith(const RTCString &that, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Returns true if @a this begins with @a that.
+     * @param   that    Prefix to test for.
+     * @param   cs      Case sensitivity selector.
+     * @returns true if match, false if mismatch.
+     */
+    bool startsWith(const RTCString &that, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Checks if the string starts with the given word, ignoring leading blanks.
+     *
+     * @param   pszWord The word to test for.
+     * @param   enmCase Case sensitivity selector.
+     * @returns true if match, false if mismatch.
+     */
+    bool startsWithWord(const char *pszWord, CaseSensitivity enmCase = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Checks if the string starts with the given word, ignoring leading blanks.
+     *
+     * @param   rThat   Prefix to test for.
+     * @param   enmCase Case sensitivity selector.
+     * @returns true if match, false if mismatch.
+     */
+    bool startsWithWord(const RTCString &rThat, CaseSensitivity enmCase = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Returns true if @a this contains @a that (strstr).
+     *
+     * @param   that    Substring to look for.
+     * @param   cs      Case sensitivity selector.
+     * @returns true if found, false if not found.
+     */
+    bool contains(const RTCString &that, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Returns true if @a this contains @a pszNeedle (strstr).
+     *
+     * @param   pszNeedle   Substring to look for.
+     * @param   cs          Case sensitivity selector.
+     * @returns true if found, false if not found.
+     */
+    bool contains(const char *pszNeedle, CaseSensitivity cs = CaseSensitive) const RT_NOEXCEPT;
+
+    /**
+     * Attempts to convert the member string into a 32-bit integer.
+     *
+     * @returns 32-bit unsigned number on success.
+     * @returns 0 on failure.
+     */
+    int32_t toInt32() const RT_NOEXCEPT
+    {
+        return RTStrToInt32(c_str());
+    }
+
+    /**
+     * Attempts to convert the member string into an unsigned 32-bit integer.
+     *
+     * @returns 32-bit unsigned number on success.
+     * @returns 0 on failure.
+     */
+    uint32_t toUInt32() const RT_NOEXCEPT
+    {
+        return RTStrToUInt32(c_str());
+    }
+
+    /**
+     * Attempts to convert the member string into an 64-bit integer.
+     *
+     * @returns 64-bit unsigned number on success.
+     * @returns 0 on failure.
+     */
+    int64_t toInt64() const RT_NOEXCEPT
+    {
+        return RTStrToInt64(c_str());
+    }
+
+    /**
+     * Attempts to convert the member string into an unsigned 64-bit integer.
+     *
+     * @returns 64-bit unsigned number on success.
+     * @returns 0 on failure.
+     */
+    uint64_t toUInt64() const RT_NOEXCEPT
+    {
+        return RTStrToUInt64(c_str());
+    }
+
+    /**
+     * Attempts to convert the member string into an unsigned 64-bit integer.
+     *
+     * @param   i       Where to return the value on success.
+     * @returns IPRT error code, see RTStrToInt64.
+     */
+    int toInt(uint64_t &i) const RT_NOEXCEPT;
+
+    /**
+     * Attempts to convert the member string into an unsigned 32-bit integer.
+     *
+     * @param   i       Where to return the value on success.
+     * @returns IPRT error code, see RTStrToInt32.
+     */
+    int toInt(uint32_t &i) const RT_NOEXCEPT;
+
+    /** Splitting behavior regarding empty sections in the string. */
+    enum SplitMode
+    {
+        KeepEmptyParts,  /**< Empty parts are added as empty strings to the result list. */
+        RemoveEmptyParts /**< Empty parts are skipped. */
+    };
+
+    /**
+     * Splits a string separated by strSep into its parts.
+     *
+     * @param   a_rstrSep   The separator to search for.
+     * @param   a_enmMode   How should empty parts be handled.
+     * @returns separated strings as string list.
+     * @throws  std::bad_alloc  On allocation error.
+     */
+    RTCList<RTCString, RTCString *> split(const RTCString &a_rstrSep,
+                                          SplitMode a_enmMode = RemoveEmptyParts) const;
+
+    /**
+     * Joins a list of strings together using the provided separator and
+     * an optional prefix for each item in the list.
+     *
+     * @param   a_rList         The list to join.
+     * @param   a_rstrPrefix    The prefix used for appending to each item.
+     * @param   a_rstrSep       The separator used for joining.
+     * @returns joined string.
+     * @throws  std::bad_alloc  On allocation error.
+     */
+    static RTCString joinEx(const RTCList<RTCString, RTCString *> &a_rList,
+                            const RTCString &a_rstrPrefix /* = "" */,
+                            const RTCString &a_rstrSep /* = "" */);
+
+    /**
+     * Joins a list of strings together using the provided separator.
+     *
+     * @param   a_rList     The list to join.
+     * @param   a_rstrSep   The separator used for joining.
+     * @returns joined string.
+     * @throws  std::bad_alloc  On allocation error.
+     */
+    static RTCString join(const RTCList<RTCString, RTCString *> &a_rList,
+                          const RTCString &a_rstrSep = "");
+
+    /**
+     * Swaps two strings in a fast way.
+     *
+     * Exception safe.
+     *
+     * @param   a_rThat  The string to swap with.
+     */
+    inline void swap(RTCString &a_rThat) RT_NOEXCEPT
+    {
+        char   *pszTmp         = m_psz;
+        size_t  cchTmp         = m_cch;
+        size_t  cbAllocatedTmp = m_cbAllocated;
+
+        m_psz                  = a_rThat.m_psz;
+        m_cch                  = a_rThat.m_cch;
+        m_cbAllocated          = a_rThat.m_cbAllocated;
+
+        a_rThat.m_psz          = pszTmp;
+        a_rThat.m_cch          = cchTmp;
+        a_rThat.m_cbAllocated  = cbAllocatedTmp;
+    }
+
+protected:
+
+    /**
+     * Hide operator bool() to force people to use isEmpty() explicitly.
+     */
+    operator bool() const;
+
+    /**
+     * Destructor implementation, also used to clean up in operator=() before
+     * assigning a new string.
+     */
+    void cleanup() RT_NOEXCEPT
+    {
+        if (m_psz)
+        {
+            RTStrFree(m_psz);
+            m_psz = NULL;
+            m_cch = 0;
+            m_cbAllocated = 0;
+        }
+    }
+
+    /**
+     * Protected internal helper to copy a string.
+     *
+     * This ignores the previous object state, so either call this from a
+     * constructor or call cleanup() first.  copyFromN() unconditionally sets
+     * the members to a copy of the given other strings and makes no
+     * assumptions about previous contents.  Can therefore be used both in copy
+     * constructors, when member variables have no defined value, and in
+     * assignments after having called cleanup().
+     *
+     * @param   pcszSrc         The source string.
+     * @param   cchSrc          The number of chars (bytes) to copy from the
+     *                          source strings.  RTSTR_MAX is NOT accepted.
+     *
+     * @throws  std::bad_alloc  On allocation failure.  The object is left
+     *                          describing a NULL string.
+     */
+    void copyFromN(const char *pcszSrc, size_t cchSrc)
+    {
+        if (cchSrc)
+        {
+            m_psz = RTStrAlloc(cchSrc + 1);
+            if (RT_LIKELY(m_psz))
+            {
+                m_cch = cchSrc;
+                m_cbAllocated = cchSrc + 1;
+                memcpy(m_psz, pcszSrc, cchSrc);
+                m_psz[cchSrc] = '\0';
+            }
+            else
+            {
+                m_cch = 0;
+                m_cbAllocated = 0;
+#ifdef RT_EXCEPTIONS_ENABLED
+                throw std::bad_alloc();
+#endif
+            }
+        }
+        else
+        {
+            m_cch = 0;
+            m_cbAllocated = 0;
+            m_psz = NULL;
+        }
+    }
+
+    /**
+     * Appends exactly @a cchSrc chars from @a pszSrc to @a this.
+     *
+     * This is an internal worker for the append() methods.
+     *
+     * @returns Reference to the object.
+     * @param   pszSrc          The source string.
+     * @param   cchSrc          The source string length (exact).
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     *
+     */
+    RTCString &appendWorker(const char *pszSrc, size_t cchSrc);
+
+    /**
+     * Appends exactly @a cchSrc chars from @a pszSrc to @a this.
+     *
+     * This is an internal worker for the appendNoThrow() methods.
+     *
+     * @returns VINF_SUCCESS or VERR_NO_STRING_MEMORY.
+     * @param   pszSrc          The source string.
+     * @param   cchSrc          The source string length (exact).
+     */
+    int appendWorkerNoThrow(const char *pszSrc, size_t cchSrc) RT_NOEXCEPT;
+
+    /**
+     * Replaces exatly @a cchLength chars at @a offStart with @a cchSrc from @a
+     * pszSrc.
+     *
+     * @returns Reference to the object.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   pszSrc          The replacement string.
+     * @param   cchSrc          The exactly length of the replacement string.
+     *
+     * @throws  std::bad_alloc  On allocation error.  The object is left unchanged.
+     */
+    RTCString &replaceWorker(size_t offStart, size_t cchLength, const char *pszSrc, size_t cchSrc);
+
+    /**
+     * Replaces exatly @a cchLength chars at @a offStart with @a cchSrc from @a
+     * pszSrc.
+     *
+     * @returns VINF_SUCCESS, VERR_OUT_OF_RANGE or VERR_NO_STRING_MEMORY.
+     * @param   offStart        Where in @a this string to start replacing.
+     * @param   cchLength       How much following @a offStart to replace.  npos is
+     *                          accepted.
+     * @param   pszSrc          The replacement string.
+     * @param   cchSrc          The exactly length of the replacement string.
+     */
+    int replaceWorkerNoThrow(size_t offStart, size_t cchLength, const char *pszSrc, size_t cchSrc) RT_NOEXCEPT;
+
+    static DECLCALLBACK(size_t) printfOutputCallback(void *pvArg, const char *pachChars, size_t cbChars);
+    static DECLCALLBACK(size_t) printfOutputCallbackNoThrow(void *pvArg, const char *pachChars, size_t cbChars) RT_NOEXCEPT;
+
+    char   *m_psz;                      /**< The string buffer. */
+    size_t  m_cch;                      /**< strlen(m_psz) - i.e. no terminator included. */
+    size_t  m_cbAllocated;              /**< Size of buffer that m_psz points to; at least m_cbLength + 1. */
+};
+
+/** @} */
+
+
+/** @addtogroup grp_rt_cpp_string
+ * @{
+ */
+
+/**
+ * Concatenate two strings.
+ *
+ * @param   a_rstr1     String one.
+ * @param   a_rstr2     String two.
+ * @returns the concatenate string.
+ *
+ * @relates RTCString
+ */
+RTDECL(const RTCString) operator+(const RTCString &a_rstr1, const RTCString &a_rstr2);
+
+/**
+ * Concatenate two strings.
+ *
+ * @param   a_rstr1     String one.
+ * @param   a_psz2      String two.
+ * @returns the concatenate string.
+ *
+ * @relates RTCString
+ */
+RTDECL(const RTCString) operator+(const RTCString &a_rstr1, const char *a_psz2);
+
+/**
+ * Concatenate two strings.
+ *
+ * @param   a_psz1      String one.
+ * @param   a_rstr2     String two.
+ * @returns the concatenate string.
+ *
+ * @relates RTCString
+ */
+RTDECL(const RTCString) operator+(const char *a_psz1, const RTCString &a_rstr2);
+
+/**
+ * Class with RTCString::printf as constructor for your convenience.
+ *
+ * Constructing a RTCString string object from a format string and a variable
+ * number of arguments can easily be confused with the other RTCString
+ * constructors, thus this child class.
+ *
+ * The usage of this class is like the following:
+ * @code
+    RTCStringFmt strName("program name = %s", argv[0]);
+   @endcode
+ */
+class RTCStringFmt : public RTCString
+{
+public:
+
+    /**
+     * Constructs a new string given the format string and the list of the
+     * arguments for the format string.
+     *
+     * @param   a_pszFormat     Pointer to the format string (UTF-8),
+     *                          @see pg_rt_str_format.
+     * @param   ...             Ellipsis containing the arguments specified by
+     *                          the format string.
+     */
+    explicit RTCStringFmt(const char *a_pszFormat, ...) RT_IPRT_FORMAT_ATTR(1, 2)
+    {
+        va_list va;
+        va_start(va, a_pszFormat);
+        printfV(a_pszFormat, va);
+        va_end(va);
+    }
+
+    RTMEMEF_NEW_AND_DELETE_OPERATORS();
+
+protected:
+    RTCStringFmt() {}
+};
+
+/** @} */
+
+#endif /* !IPRT_INCLUDED_cpp_ministring_h */
+