used as it will ensure smoother transition to {\tt std::string} when wxWidgets
starts using it instead of wxString.
+Also please note that in this manual \texttt{char} is sometimes used instead of
+\texttt{wxChar} because it hasn't been fully updated yet. Please substitute as
+necessary and refer to the sources in case of a doubt.
+
+
\wxheading{Derived from}
None
\latexignore{\rtfignore{\wxheading{Function groups}}}
-\membersection{Constructors and assignment operators}
+\membersection{Constructors and assignment operators}\label{constructorsinwxstring}
A string may be constructed either from a C string, (some number of copies of)
a single character or a wide (UNICODE) string. For all constructors (except the
\helpref{operator $=$}{wxstringoperatorassign}\\
\helpref{\destruct{wxString}}{wxstringdestruct}
-\membersection{String length}
+\membersection{String length}\label{lengthfunctionsinwxstring}
These functions return the string length and check whether the string is empty
or empty it.
\helpref{Empty}{wxstringempty}\\
\helpref{Clear}{wxstringclear}
-\membersection{Character access}
+\membersection{Character access}\label{characteraccessinwxstring}
Many functions in this section take a character index in the string. As with C
strings and/or arrays, the indices start from $0$, so the first character of a
\helpref{Last}{wxstringlast}\\
\helpref{operator []}{wxstringoperatorbracket}\\
\helpref{c\_str}{wxstringcstr}\\
+\helpref{mb\_str}{wxstringmbstr}\\
+\helpref{wc\_str}{wxstringwcstr}\\
+\helpref{fn\_str}{wxstringfnstr}\\
\helpref{operator const char*}{wxstringoperatorconstcharpt}
-\membersection{Concatenation}
+\membersection{Concatenation}\label{concatenationinwxstring}
Anything may be concatenated (appended to) with a string. However, you can't
append something to a C string (including literal constants), so to do this it
\helpref{Append}{wxstringappend}\\
\helpref{Prepend}{wxstringprepend}
-\membersection{Comparison}
+\membersection{Comparison}\label{comparisoninwxstring}
The default comparison function \helpref{Cmp}{wxstringcmp} is case-sensitive and
so is the default version of \helpref{IsSameAs}{wxstringissameas}. For case
\helpref{CmpNoCase}{wxstringcmpnocase}\\
\helpref{IsSameAs}{wxstringissameas}\\
\helpref{Matches}{wxstringmatches}\\
-\helpref{StartsWith}{wxstringstartswith}
+\helpref{StartsWith}{wxstringstartswith}\\
+\helpref{EndsWith}{wxstringendswith}
-\membersection{Substring extraction}
+\membersection{Substring extraction}\label{substringextractioninwxstring}
These functions allow to extract substring from this string. All of them don't
modify the original string and return a new string containing the extracted
\helpref{BeforeLast}{wxstringbeforelast}\\
\helpref{AfterFirst}{wxstringafterfirst}\\
\helpref{AfterLast}{wxstringafterlast}\\
-\helpref{StartsWith}{wxstringstartswith}
+\helpref{StartsWith}{wxstringstartswith}\\
+\helpref{EndsWith}{wxstringendswith}
-\membersection{Case conversion}
+
+\membersection{Case conversion}\label{caseconversioninwxstring}
The MakeXXX() variants modify the string in place, while the other functions
return a new string which contains the original text converted to the upper or
\helpref{MakeLower}{wxstringmakelower}\\
\helpref{Lower}{wxstringlower}
-\membersection{Searching and replacing}
+\membersection{Searching and replacing}\label{searchingandreplacinginwxstring}
These functions replace the standard {\it strchr()} and {\it strstr()}
functions.
\helpref{Find}{wxstringfind}\\
\helpref{Replace}{wxstringreplace}
-\membersection{Conversion to numbers}
+\membersection{Conversion to numbers}\label{conversiontonumbersinwxstring}
The string provides functions for conversion to signed and unsigned integer and
floating point numbers. All three functions take a pointer to the variable to
\helpref{ToULong}{wxstringtoulong}\\
\helpref{ToDouble}{wxstringtodouble}
-\membersection{Writing values into the string}
+\membersection{Writing values into the string}\label{writingintostringinwxstring}
Both formatted versions (\helpref{Printf}{wxstringprintf}) and stream-like
insertion operators exist (for basic types only). Additionally, the
\helpref{PrintfV}{wxstringprintfv}\\
\helpref{operator \cinsert}{wxstringoperatorout}
-\membersection{Memory management}
+\membersection{Memory management}\label{memoryinwxstring}
These are "advanced" functions and they will be needed quite rarely.
\helpref{Alloc}{wxstringalloc} and \helpref{Shrink}{wxstringshrink} are only
\helpref{GetWriteBuf}{wxstringgetwritebuf}\\
\helpref{UngetWriteBuf}{wxstringungetwritebuf}
-\membersection{Miscellaneous}
+\membersection{Miscellaneous}\label{miscellaneousinwxstring}
Other string functions.
\helpref{Pad}{wxstringpad}\\
\helpref{Truncate}{wxstringtruncate}
-\membersection{wxWidgets 1.xx compatibility functions}
+\membersection{wxWidgets 1.xx compatibility functions}\label{backwardcompatibilityinwxstring}
These functions are deprecated, please consider using new wxWidgets 2.0
functions instead of them (or, even better, std::string compatible variants).
\func{}{wxString}{\void}
-Default constructor.
+Default constructor. Initializes the string to {\tt ""} (empty string).
\func{}{wxString}{\param{const wxString\&}{ x}}
\func{}{wxString}{\param{const char*}{ psz}, \param{size\_t}{ nLength = wxSTRING\_MAXLEN}}
Takes first {\it nLength} characters from the C string {\it psz}.
-The default value of wxSTRING\_MAXLEN means to take all the string.
+The default value of {\tt wxSTRING\_MAXLEN} means to take all the string.
Note that this constructor may be used even if {\it psz} points to a buffer
with binary data (i.e. containing {\tt NUL} characters) as long as you provide
\func{}{wxString}{\param{const unsigned char*}{ psz}, \param{size\_t}{ nLength = wxSTRING\_MAXLEN}}
For compilers using unsigned char: takes first {\it nLength} characters from the C string {\it psz}.
-The default value of wxSTRING\_MAXLEN means take all the string.
+The default value of {\tt wxSTRING\_MAXLEN} means take all the string.
+
+{\bf Note:} In Unicode build, all of the above constructors take
+{\tt wchar\_t} arguments instead of {\tt char}.
+
+\wxheading{Constructors with conversion}
+
+The following constructors allow you to construct wxString from wide string
+in ANSI build or from C string in Unicode build.
+
+\func{}{wxString}{\param{const wchar\_t*}{ psz}, \param{wxMBConv\&}{ conv}, \param{size\_t}{ nLength = wxSTRING\_MAXLEN}}
-\func{}{wxString}{\param{const wchar\_t*}{ psz}}
+Initializes the string from first \arg{nLength} characters of wide string.
+The default value of {\tt wxSTRING\_MAXLEN} means take all the string.
+In ANSI build, \arg{conv}'s
+\helpref{WC2MB}{wxmbconvwc2mb} method is called to
+convert \arg{psz} to wide string. It is ignored in Unicode build.
-Constructs a string from the wide (UNICODE) string.
+\func{}{wxString}{\param{const char*}{ psz}, \param{wxMBConv\&}{ conv}, \param{size\_t}{ nLength = wxSTRING\_MAXLEN}}
+
+Initializes the string from first \arg{nLength} characters of C string.
+The default value of {\tt wxSTRING\_MAXLEN} means take all the string.
+In Unicode build, \arg{conv}'s
+\helpref{MB2WC}{wxmbconvmb2wc} method is called to
+convert \arg{psz} to wide string. It is ignored in ANSI build.
+
+\wxheading{See also}
+
+\helpref{wxMBConv classes}{mbconvclasses}, \helpref{mb\_str}{wxstringmbstr},
+\helpref{wc\_str}{wxstringwcstr}
\membersection{wxString::\destruct{wxString}}\label{wxstringdestruct}
\end{verbatim}
-because it will avoid the need of reallocating string memory many times (in case
+because it will avoid the need to reallocate string memory many times (in case
of long strings). Note that it does not set the maximal length of a string - it
will still expand if more than {\it nLen} characters are stored in it. Also, it
does not truncate the existing string (use
\membersection{wxString::c\_str}\label{wxstringcstr}
-\constfunc{const char *}{c\_str}{\void}
+\constfunc{const wxChar *}{c\_str}{\void}
+
+Returns a pointer to the string data ({\tt const char*} in ANSI build,
+{\tt const wchar\_t*} in Unicode build).
+
+\wxheading{See also}
-Returns a pointer to the string data.
+\helpref{mb\_str}{wxstringmbstr}, \helpref{wc\_str}{wxstringwcstr},
+\helpref{fn\_str}{wxstringfnstr}
\membersection{wxString::Clear}\label{wxstringclear}
\membersection{wxString::Cmp}\label{wxstringcmp}
+\constfunc{int}{Cmp}{\param{const wxString\&}{ s}}
+
\constfunc{int}{Cmp}{\param{const char*}{ psz}}
Case-sensitive comparison.
\membersection{wxString::CmpNoCase}\label{wxstringcmpnocase}
+\constfunc{int}{CmpNoCase}{\param{const wxString\&}{ s}}
+
\constfunc{int}{CmpNoCase}{\param{const char*}{ psz}}
Case-insensitive comparison.
\constfunc{bool}{Contains}{\param{const wxString\&}{ str}}
-Returns 1 if target appears anyhere in wxString; else 0.
+Returns 1 if target appears anywhere in wxString; else 0.
\membersection{wxString::Empty}\label{wxstringempty}
Same as \helpref{Find}{wxstringfind}.
+\membersection{wxString::fn\_str}\label{wxstringfnstr}
+
+\constfunc{const wchar\_t*}{fn\_str}{\void}
+
+\constfunc{const char*}{fn\_str}{\void}
+
+\constfunc{const wxCharBuffer}{fn\_str}{\void}
+
+Returns string representation suitable for passing to OS' functions for
+file handling. In ANSI build, this is same as \helpref{c\_str}{wxstringcstr}.
+In Unicode build, returned value can be either wide character string
+or C string in charset matching the {\tt wxConvFileName} object, depending on
+the OS.
+
+\wxheading{See also}
+
+\helpref{wxMBConv}{wxmbconv},
+\helpref{wc\_str}{wxstringwcstr}, \helpref{mb\_str}{wxstringwcstr}
+
\membersection{wxString::Format}\label{wxstringformat}
\func{static wxString}{Format}{\param{const wxChar }{*format}, \param{}{...}}
\membersection{wxString::FormatV}\label{wxstringformatv}
-\func{static wxString}{Format}{\param{const wxChar }{*format}, \param{va\_list }{argptr}}
+\func{static wxString}{FormatV}{\param{const wxChar }{*format}, \param{va\_list }{argptr}}
This static function returns the string containing the result of calling
\helpref{PrintfV}{wxstringprintfv} with the passed parameters on it.
Converts the string or character from an ASCII, 7-bit form
to the native wxString representation. Most useful when using
a Unicode build of wxWidgets.
+Use \helpref{wxString constructors}{wxstringconstruct} if you
+need to convert from another charset.
\membersection{wxString::GetChar}\label{wxstringgetchar}
\membersection{wxString::GetData}\label{wxstringgetdata}
-\constfunc{const char*}{GetData}{\void}
+\constfunc{const wxChar*}{GetData}{\void}
wxWidgets compatibility conversion. Returns a constant pointer to the data in the string.
Same as \helpref{wxString::Find}{wxstringfind}.
-\constfunc{size\_t}{Index}{\param{const char*}{ sz}, \param{bool}{ caseSensitive = true}, \param{bool}{ fromEnd = false}}
-
-Search the element in the array, starting from either side.
-
-If {\it fromEnd} is true, reverse search direction.
-
-If {\bf caseSensitive}, comparison is case sensitive (the default).
-
-Returns the index of the first item matched, or wxNOT\_FOUND.
-
% TODO
%\membersection{wxString::insert}\label{wxstringinsert}
% Wrong!
Returns true if strings are equal, false otherwise.
-See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}, \helpref{IsSameAs}{wxstringissameas2}
-
-\membersection{wxString::IsSameAs}\label{wxstringissameas2}
+See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}
\constfunc{bool}{IsSameAs}{\param{char}{ c}, \param{bool}{ caseSensitive = true}}
Returns true if the string is equal to the character, false otherwise.
-See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}, \helpref{IsSameAs}{wxstringissameas}
+See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}
\membersection{wxString::IsWord}\label{wxstringisword}
Returns true if the string contents matches a mask containing '*' and '?'.
+\membersection{wxString::mb\_str}\label{wxstringmbstr}
+
+\constfunc{const char*}{mb\_str}{\param{wxMBConv\&}{ conv}}
+
+\constfunc{const wxCharBuffer}{mb\_str}{\param{wxMBConv\&}{ conv}}
+
+Returns multibyte (C string) representation of the string.
+In Unicode build, converts using \arg{conv}'s \helpref{cWC2MB}{wxmbconvcwc2mb}
+method and returns wxCharBuffer. In ANSI build, this function is same
+as \helpref{c\_str}{wxstringcstr}.
+The macro wxWX2MBbuf is defined as the correct return type (without const).
+
+\wxheading{See also}
+
+\helpref{wxMBConv}{wxmbconv},
+\helpref{c\_str}{wxstringcstr}, \helpref{wc\_str}{wxstringwcstr},
+\helpref{fn\_str}{wxstringfnstr}
+
\membersection{wxString::Mid}\label{wxstringmid}
\constfunc{wxString}{Mid}{\param{size\_t}{ first}, \param{size\_t}{ count = wxSTRING\_MAXLEN}}
Similar to the standard function {\it sprintf()}. Returns the number of
characters written, or an integer less than zero on error.
+Note that if {\tt wxUSE\_PRINTF\_POS\_PARAMS} is set to 1, then this function supports
+Unix98-style positional parameters:
+
+\begin{verbatim}
+ wxString str;
+
+ str.Printf(wxT("%d %d %d"), 1, 2, 3);
+ // str now contains "1 2 3"
+
+ str.Printf(wxT("%2$d %3$d %1$d"), 1, 2, 3);
+ // str now contains "2 3 1"
+\end{verbatim}
+
{\bf NB:} This function will use a safe version of {\it vsprintf()} (usually called
{\it vsnprintf()}) whenever available to always allocate the buffer of correct
size. Unfortunately, this function is not available on all platforms and the
\func{wxString\&}{Remove}{\param{size\_t}{ pos}, \param{size\_t}{ len}}
-Removes the {\it len} characters from the string, starting at {\it pos}.
+Removes {\it len} characters from the string, starting at {\it pos}.
\membersection{wxString::RemoveLast}\label{wxstringremovelast}
{\tt NULL}. Otherwise, the function returns {\tt false} and doesn't modify the
{\it rest}.
+\membersection{wxString::EndsWith}\label{wxstringendswith}
+
+\constfunc{bool}{EndsWith}{\param{const wxChar }{*suffix}, \param{wxString }{*rest = NULL}}
+
+This function can be used to test if the string ends with the specified
+{\it suffix}. If it does, the function will return {\tt true} and put the
+beginning of the string before the suffix into {\it rest} string if it is not
+{\tt NULL}. Otherwise, the function returns {\tt false} and doesn't
+modify the {\it rest}.
+
\membersection{wxString::Strip}\label{wxstringstrip}
\begin{verbatim}
Converts the string to an ASCII, 7-bit string in the form of
a wxCharBuffer (Unicode builds only).
+Note that this conversion only works if the string contains only ASCII
+characters. The \helpref{mb\_str}{wxstringmbstr} method provides more
+powerful means of converting wxString to C string.
+
\membersection{wxString::ToDouble}\label{wxstringtodouble}
\constfunc{bool}{ToDouble}{\param{double}{ *val}}
\constfunc{bool}{ToULong}{\param{unsigned long}{ *val}, \param{int }{base = $10$}}
-Attempts to convert the string to a ansigned integer in base {\it base}.
+Attempts to convert the string to an unsigned integer in base {\it base}.
Returns {\tt true} on success in which case the number is stored in the
location pointed to by {\it val} or {\tt false} if the string does not
-represent a valid number in the given base.
+represent a valid number in the given base. Please notice that this function
+behaves in the same way as the standard \texttt{strtoul()} and so it simply
+converts negative numbers to unsigned representation instead of rejecting them
+(e.g. $-1$ is returned as \texttt{ULONG\_MAX}).
See \helpref{wxString::ToLong}{wxstringtolong} for the more detailed
description of the {\it base} parameter.
\func{wxString\&}{Trim}{\param{bool}{ fromRight = true}}
-Removes spaces from the left or from the right (default).
+Removes white-space (space, tabs, form feed, newline and carriage return) from
+the left or from the right end of the string (right is default).
\membersection{wxString::Truncate}\label{wxstringtruncate}
The same as MakeUpper.
+\membersection{wxString::wc\_str}\label{wxstringwcstr}
+
+\constfunc{const wchar\_t*}{wc\_str}{\param{wxMBConv\&}{ conv}}
+
+\constfunc{const wxWCharBuffer}{wc\_str}{\param{wxMBConv\&}{ conv}}
+
+Returns wide character representation of the string.
+In ANSI build, converts using \arg{conv}'s \helpref{cMB2WC}{wxmbconvcmb2wc}
+method and returns wxWCharBuffer. In Unicode build, this function is same
+as \helpref{c\_str}{wxstringcstr}.
+The macro wxWX2WCbuf is defined as the correct return type (without const).
+
+\wxheading{See also}
+
+\helpref{wxMBConv}{wxmbconv},
+\helpref{c\_str}{wxstringcstr}, \helpref{mb\_str}{wxstringwcstr},
+\helpref{fn\_str}{wxstringfnstr}
+
\membersection{wxString::operator!}\label{wxstringoperatornot}
\constfunc{bool}{operator!}{\void}
Empty string is false, so !string will only return true if the string is empty.
-This allows the tests for NULLness of a {\it const char *} pointer and emptyness
+This allows the tests for NULLness of a {\it const char *} pointer and emptiness
of the string to look the same in the code and makes it easier to port old code
to wxString.
\membersection{wxString::operator $+$}\label{wxstringoperatorplus}
-Concatenation: all these operators return a new strign equal to the sum of the
-operands.
+Concatenation: all these operators return a new string equal to the
+concatenation of the operands.
\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}}
\membersection{wxString::operator []}\label{wxstringoperatorbracket}
-\func{char\&}{operator []}{\param{size\_t}{ i}}
+\func{wxChar\&}{operator []}{\param{size\_t}{ i}}
-\func{char}{operator []}{\param{size\_t}{ i}}
+\constfunc{wxChar}{operator []}{\param{size\_t}{ i}}
-\func{char}{operator []}{\param{int}{ i}}
+\func{wxChar\&}{operator []}{\param{int}{ i}}
+
+\constfunc{wxChar}{operator []}{\param{int}{ i}}
Element extraction.
\section{\class{wxStringBuffer}}\label{wxstringbuffer}
This tiny class allows to conveniently access the \helpref{wxString}{wxstring}
-internal buffer as a writable pointer without any risk to forget to restore
+internal buffer as a writable pointer without any risk of forgetting to restore
the string to the usable state later.
For example, assuming you have a low-level OS function called
}
\end{verbatim}
+Note that the exact usage of this depends on whether on not wxUSE\_STL is enabled. If
+wxUSE\_STL is enabled, wxStringBuffer creates a separate empty character buffer, and
+if wxUSE\_STL is disabled, it uses GetWriteBuf() from wxString, keeping the same buffer
+wxString uses intact. In other words, relying on wxStringBuffer containing the old
+wxString data is probably not a good idea if you want to build your program in both
+with and without wxUSE\_STL.
+
\wxheading{Derived from}
None
\latexignore{\rtfignore{\wxheading{Members}}}
-\membersection{wxStringBuffer::wxStringBuffer}
+\membersection{wxStringBuffer::wxStringBuffer}\label{wxstringbufferctor}
\func{}{wxStringBuffer}{\param{const wxString\& }{str}, \param{size\_t }{len}}
is equivalent to calling \helpref{GetWriteBuf}{wxstringgetwritebuf} and
saving the result.
-\membersection{wxStringBuffer::\destruct{wxStringBuffer}}
+\membersection{wxStringBuffer::\destruct{wxStringBuffer}}\label{wxstringbufferdtor}
\func{}{\destruct{wxStringBuffer}}{\void}
Restores the string passed to the constructor to the usable state by calling
\helpref{UngetWriteBuf}{wxstringungetwritebuf} on it.
-\membersection{wxStringBuffer::operator wxChar *}
+\membersection{wxStringBuffer::operator wxChar *}\label{wxstringbufferwxchar}
+
+\func{wxChar *}{operator wxChar *}{\void}
+
+Returns the writable pointer to a buffer of the size at least equal to the
+length specified in the constructor.
+
+
+
+\section{\class{wxStringBufferLength}}\label{wxstringbufferlength}
+
+This tiny class allows to conveniently access the \helpref{wxString}{wxstring}
+internal buffer as a writable pointer without any risk of forgetting to restore
+the string to the usable state later, and allows the user to set the internal
+length of the string.
+
+For example, assuming you have a low-level OS function called
+{\tt int GetMeaningOfLifeAsString(char *)} copying the value in the provided
+buffer (which must be writable, of course), and returning the actual length
+of the string, you might call it like this:
+
+\begin{verbatim}
+ wxString theAnswer;
+ wxStringBuffer theAnswerBuffer(theAnswer, 1024);
+ int nLength = GetMeaningOfLifeAsString(theAnswerBuffer);
+ theAnswerBuffer.SetLength(nLength);
+ if ( theAnswer != "42" )
+ {
+ wxLogError("Something is very wrong!");
+ }
+\end{verbatim}
+
+Note that the exact usage of this depends on whether on not wxUSE\_STL is enabled. If
+wxUSE\_STL is enabled, wxStringBuffer creates a separate empty character buffer, and
+if wxUSE\_STL is disabled, it uses GetWriteBuf() from wxString, keeping the same buffer
+wxString uses intact. In other words, relying on wxStringBuffer containing the old
+wxString data is probably not a good idea if you want to build your program in both
+with and without wxUSE\_STL.
+
+Note that SetLength {\tt must} be called before wxStringBufferLength destructs.
+
+\wxheading{Derived from}
+
+None
+
+\wxheading{Include files}
+
+<wx/string.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxStringBufferLength::wxStringBufferLength}\label{wxstringbufferlengthctor}
+
+\func{}{wxStringBufferLength}{\param{const wxString\& }{str}, \param{size\_t }{len}}
+
+Constructs a writable string buffer object associated with the given string
+and containing enough space for at least {\it len} characters. Basically, this
+is equivalent to calling \helpref{GetWriteBuf}{wxstringgetwritebuf} and
+saving the result.
+
+\membersection{wxStringBufferLength::\destruct{wxStringBufferLength}}\label{wxstringbufferlengthdtor}
+
+\func{}{\destruct{wxStringBufferLength}}{\void}
+
+Restores the string passed to the constructor to the usable state by calling
+\helpref{UngetWriteBuf}{wxstringungetwritebuf} on it.
+
+\membersection{wxStringBufferLength::SetLength}\label{wxstringbufferlengthsetlength}
+
+\func{void}{SetLength}{\param{size\_t }{nLength}}
+
+Sets the internal length of the string referred to by wxStringBufferLength to
+{\it nLength} characters.
+
+Must be called before wxStringBufferLength destructs.
+
+\membersection{wxStringBufferLength::operator wxChar *}\label{wxstringbufferlengthwxchar}
-\constfunc{wxChar *}{operator wxChar *}{\void}
+\func{wxChar *}{operator wxChar *}{\void}
Returns the writable pointer to a buffer of the size at least equal to the
length specified in the constructor.
projects / wxWidgets.git / blobdiff