ministring.h revision c58f1213e628a545081c70e26c6b67a841cff880
883N/A/** @file
883N/A * IPRT - C++ string class.
883N/A */
883N/A
883N/A/*
883N/A * Copyright (C) 2007-2012 Oracle Corporation
883N/A *
883N/A * This file is part of VirtualBox Open Source Edition (OSE), as
883N/A * available from http://www.virtualbox.org. This file is free software;
883N/A * you can redistribute it and/or modify it under the terms of the GNU
883N/A * General Public License (GPL) as published by the Free Software
883N/A * Foundation, in version 2 as it comes in the "COPYING" file of the
883N/A * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
883N/A * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
883N/A *
883N/A * The contents of this file may alternatively be used under the terms
883N/A * of the Common Development and Distribution License Version 1.0
883N/A * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
883N/A * VirtualBox OSE distribution, in which case the provisions of the
883N/A * CDDL are applicable instead of those of the GPL.
883N/A *
883N/A * You may elect to license modified versions of this file under the
1574N/A * terms and conditions of either the GPL or the CDDL or both.
883N/A */
883N/A
883N/A#ifndef ___iprt_cpp_ministring_h
883N/A#define ___iprt_cpp_ministring_h
883N/A
883N/A#include <iprt/mem.h>
883N/A#include <iprt/string.h>
883N/A#include <iprt/stdarg.h>
883N/A#include <iprt/cpp/list.h>
1273N/A
883N/A#include <new>
883N/A
883N/A
883N/A/** @defgroup grp_rt_cpp_string C++ String support
883N/A * @ingroup grp_rt_cpp
883N/A * @{
883N/A */
883N/A
1653N/A/** @brief C++ string class.
883N/A *
956N/A * This is a C++ string class that does not depend on anything else except IPRT
883N/A * memory management functions. Semantics are like in std::string, except it
883N/A * can do a lot less.
883N/A *
883N/A * Note that RTCString does not differentiate between NULL strings
883N/A * and empty strings. In other words, RTCString("") and RTCString(NULL)
883N/A * behave the same. In both cases, RTCString allocates no memory, reports
883N/A * a zero length and zero allocated bytes for both, and returns an empty
883N/A * C string from c_str().
1574N/A *
1574N/A * @note RTCString ASSUMES that all strings it deals with are valid UTF-8.
1574N/A * The caller is responsible for not breaking this assumption.
883N/A */
883N/A#ifdef VBOX
883N/A /** @remarks Much of the code in here used to be in com::Utf8Str so that
883N/A * com::Utf8Str can now derive from RTCString and only contain code
883N/A * that is COM-specific, such as com::Bstr conversions. Compared to
883N/A * the old Utf8Str though, RTCString always knows the length of its
883N/A * member string and the size of the buffer so it can use memcpy()
883N/A * instead of strdup().
883N/A */
883N/A#endif
887N/Aclass RT_DECL_CLASS RTCString
887N/A{
887N/Apublic:
913N/A /**
913N/A * Creates an empty string that has no memory allocated.
913N/A */
913N/A RTCString()
883N/A : m_psz(NULL),
883N/A m_cch(0),
883N/A m_cbAllocated(0)
883N/A {
}
/**
* 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 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 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)
: 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
)
{
int vrc = RTStrRealloc(&m_psz, cb);
if (RT_SUCCESS(vrc))
m_cbAllocated = cb;
#ifdef RT_EXCEPTIONS_ENABLED
else
throw std::bad_alloc();
#endif
}
}
/**
* Deallocates all memory.
*/
inline void setNull()
{
cleanup();
}
RTMEMEF_NEW_AND_DELETE_OPERATORS();
/**
* Assigns a copy of pcsz to "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 "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 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, ...);
/**
* 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);
/**
* Appends the string "that" to "this".
*
* @param that 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 &that);
/**
* Appends the string "that" to "this".
*
* @param pszThat The C string to append.
*
* @throws std::bad_alloc On allocation error. The object is left unchanged.
*
* @returns Reference to the object.
*/
RTCString &append(const char *pszThat);
/**
* Appends the given character to "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 unicode code point to "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);
/**
* Shortcut to append(), RTCString variant.
*
* @param that The string to append.
*
* @returns Reference to the object.
*/
RTCString &operator+=(const RTCString &that)
{
return append(that);
}
/**
* Shortcut to append(), const char* variant.
*
* @param pszThat The C string to append.
*
* @returns Reference to the object.
*/
RTCString &operator+=(const char *pszThat)
{
return append(pszThat);
}
/**
* Shortcut to append(), char variant.
*
* @param pszThat The character to append.
*
* @returns Reference to the object.
*/
RTCString &operator+=(char c)
{
return append(c);
}
/**
* Converts the member string to upper case.
*
* @returns Reference to the object.
*/
RTCString &toUpper()
{
if (length())
{
/* Folding an UTF-8 string may result in a shorter encoding (see
testcase), so recalculate the length afterwars. */
::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()
{
if (length())
{
/* Folding an UTF-8 string may result in a shorter encoding (see
testcase), so recalculate the length afterwars. */
::RTStrToLower(m_psz);
size_t cchNew = strlen(m_psz);
Assert(cchNew <= m_cch);
m_cch = cchNew;
}
return *this;
}
/**
* 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 string.
*
* @param i The index into the string buffer.
* @returns char at the index or null.
*/
inline char operator[](size_t i) const
{
if (i < length())
return m_psz[i];
return '\0';
}
/**
* Returns the contained string as a C-style const char* 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
{
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()
{
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()
{
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
{
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
{
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
{
/* 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 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 RTCString &that, CaseSensitivity cs = CaseSensitive) const
{
if (cs == CaseSensitive)
return ::RTStrCmp(m_psz, that.m_psz);
return ::RTStrICmp(m_psz, that.m_psz);
}
/**
* Compares the two strings.
*
* @returns true if equal, false if not.
* @param that The string to compare with.
*/
bool equals(const RTCString &that) const
{
return that.length() == length()
&& memcmp(that.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
{
/* 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
{
/* 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
{
/* 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 pcszFind in "this" starting at "pos" and returns its position
* as a byte (not codepoint) offset, counting from the beginning of "this" at 0.
*
* @param pcszFind The substring to find.
* @param pos The (byte) offset into the string buffer to start
* searching.
*
* @returns 0 based position of pcszFind. npos if not found.
*/
size_t find(const char *pcszFind, size_t pos = 0) const;
/**
* 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);
/**
* 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;
/**
* 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;
/**
* 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;
/**
* Returns a substring of "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 "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 "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
* "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 "this" ends with "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;
/**
* Returns true if "this" begins with "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;
/**
* Returns true if "this" contains "that" (strstr).
*
* @param that Substring to look for.
* @param cs Case sensitivity selector.
* @returns true if match, false if mismatch.
*/
bool contains(const RTCString &that, CaseSensitivity cs = CaseSensitive) const;
/**
* 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
{
return RTStrToInt32(m_psz);
}
/**
* 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
{
return RTStrToUInt32(m_psz);
}
/**
* 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
{
return RTStrToInt64(m_psz);
}
/**
* 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
{
return RTStrToUInt64(m_psz);
}
/**
* 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;
/**
* 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;
/** 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.
*/
RTCList<RTCString, RTCString *> split(const RTCString &a_rstrSep,
SplitMode a_enmMode = RemoveEmptyParts) const;
/**
* 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.
*/
static RTCString join(const RTCList<RTCString, RTCString *> &a_rList,
const RTCString &a_rstrSep = "");
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()
{
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;
}
}
static DECLCALLBACK(size_t) printfOutputCallback(void *pvArg, const char *pachChars, size_t cbChars);
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, ...)
{
va_list va;
va_start(va, a_pszFormat);
printfV(a_pszFormat, va);
va_end(va);
}
RTMEMEF_NEW_AND_DELETE_OPERATORS();
protected:
RTCStringFmt() {}
};
/** @} */
#endif