\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{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{Matches}{wxstringmatches}\\
\helpref{StartsWith}{wxstringstartswith}
-\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{AfterLast}{wxstringafterlast}\\
\helpref{StartsWith}{wxstringstartswith}
-\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).
\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
\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{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}
\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 a 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.
\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}}
\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 seperate 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 seperate 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{}{wxStringBuffer}{\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