X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/40b480c35de6bb004aa676e55f697b833156e402..a2979ead8d5f5f2023d30d05a3c2d55f7804e24a:/docs/latex/wx/wxstring.tex diff --git a/docs/latex/wx/wxstring.tex b/docs/latex/wx/wxstring.tex index 3b06d4fecf..544bd55821 100644 --- a/docs/latex/wx/wxstring.tex +++ b/docs/latex/wx/wxstring.tex @@ -1,13 +1,23 @@ \section{\class{wxString}}\label{wxstring} wxString is a class representing a character string. Please see the -\helpref{wxString overview}{wxstringoverview} for more information about it. As explained -there, wxString implements about 90\% of methods of the std::string class (iterators -are not supported, nor all methods which use them). -These standard functions are not documented in this manual so please see the STL documentation. +\helpref{wxString overview}{wxstringoverview} for more information about it. + +As explained there, wxString implements most of the methods of the std::string +class. +These standard functions are not documented in this manual, please see the +\urlref{STL documentation}{http://www.cppreference.com/cppstl.html}). The behaviour of all these functions is identical to the behaviour described there. +You may notice that wxString sometimes has many functions which do the same +thing like, for example, \helpref{Length()}{wxstringlength}, +\helpref{Len()}{wxstringlen} and {\tt length()} which all return the string +length. In all cases of such duplication the {\tt std::string}-compatible +method ({\tt length()} in this case, always the lowercase version) should be +used as it will ensure smoother transition to {\tt std::string} when wxWidgets +starts using it instead of wxString. + \wxheading{Derived from} None @@ -16,15 +26,22 @@ None +\wxheading{Predefined objects} + +Objects: + +{\bf wxEmptyString} + \wxheading{See also} -\overview{Overview}{wxstringoverview} +\helpref{wxString overview}{wxstringoverview}, \helpref{Unicode overview}{unicode} \latexignore{\rtfignore{\wxheading{Function groups}}} -\membersection{Constructors and assignment operators} -A strign may be constructed either from a C string, (some number of copies of) +\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 default which creates an empty string) there is also a corresponding assignment operator. @@ -33,7 +50,8 @@ operator. \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. @@ -44,19 +62,20 @@ 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 string is string[$0$]. Attempt to access a character beyond the end of the -string (which may be even $0$ if the string is empty) will provocate an assert +string (which may be even $0$ if the string is empty) will provoke an assert failure in \helpref{debug build}{debuggingoverview}, but no checks are done in release builds. This section also contains both implicit and explicit conversions to C style strings. Although implicit conversion is quite convenient, it is advised to use explicit \helpref{c\_str()}{wxstringcstr} method for the sake of clarity. Also -see \helpref{overiview}{wxstringadvices} for the cases where it is necessary to +see \helpref{overview}{wxstringadvices} for the cases where it is necessary to use it. \helpref{GetChar}{wxstringgetchar}\\ @@ -65,9 +84,13 @@ use it. \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 @@ -79,26 +102,35 @@ should be converted to a wxString first. \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 insensitive comparisons you should use \helpref{CmpNoCase}{wxstringcmpnocase} or give a second parameter to IsSameAs. This last function is may be more convenient if only equality of the strings matters because it returns a boolean -true value if the strings are the same and not 0 (which is usually FALSE in C) -as Cmp does. +\true value if the strings are the same and not 0 (which is usually false in C) +as {\tt Cmp()} does. \helpref{Matches}{wxstringmatches} is a poor man's regular expression matcher: it only understands '*' and '?' metacharacters in the sense of DOS command line interpreter. +\helpref{StartsWith}{wxstringstartswith} is helpful when parsing a line of +text which should start with some predefined prefix and is more efficient than +doing direct string comparison as you would also have to precalculate the +length of the prefix then. + \helpref{Cmp}{wxstringcmp}\\ \helpref{CmpNoCase}{wxstringcmpnocase}\\ \helpref{IsSameAs}{wxstringissameas}\\ -\helpref{Matches}{wxstringmatches} +\helpref{Matches}{wxstringmatches}\\ +\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 @@ -111,12 +143,16 @@ substring. \helpref{BeforeFirst}{wxstringbeforefirst}\\ \helpref{BeforeLast}{wxstringbeforelast}\\ \helpref{AfterFirst}{wxstringafterfirst}\\ -\helpref{AfterLast}{wxstringafterlast} +\helpref{AfterLast}{wxstringafterlast}\\ +\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 containts the original text converted to the upper or +return a new string which contains the original text converted to the upper or lower case and leave the original string unchanged. \helpref{MakeUpper}{wxstringmakeupper}\\ @@ -124,7 +160,8 @@ lower case and leave the original string unchanged. \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. @@ -132,63 +169,95 @@ functions. \helpref{Find}{wxstringfind}\\ \helpref{Replace}{wxstringreplace} -\membersection{Writing values into the string} + +\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 +put the numeric value in and return \true if the {\bf entire} string could be +converted to a number. + +\helpref{ToLong}{wxstringtolong}\\ +\helpref{ToLongLong}{wxstringtolonglong}\\ +\helpref{ToULong}{wxstringtoulong}\\ +\helpref{ToULongLong}{wxstringtoulonglong}\\ +\helpref{ToDouble}{wxstringtodouble} + + +\membersection{Writing values into the string}\label{writingintostringinwxstring} Both formatted versions (\helpref{Printf}{wxstringprintf}) and stream-like -insertion operators exist (for basic types only). +insertion operators exist (for basic types only). Additionally, the +\helpref{Format}{wxstringformat} function allows to use simply append +formatted value to a string: + +\begin{verbatim} + // the following 2 snippets are equivalent + wxString s = "..."; + s += wxString::Format("%d", n); + + wxString s; + s.Printf("...%d", n); +\end{verbatim} + +\helpref{Format}{wxstringformat}\\ +\helpref{FormatV}{wxstringformatv}\\ \helpref{Printf}{wxstringprintf}\\ \helpref{PrintfV}{wxstringprintfv}\\ \helpref{operator \cinsert}{wxstringoperatorout} -\membersection{Memory management} -These are "advanced" functions and they will be needed quite rarily. +\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 interesting for optimization purposes. -\helpref{GetWriteBuf}{wxstringgetwritebuf} may be very useful when working with -some external API which requires the caller to provide a writable buffer, but -extreme care should be taken when using it: before performing any other -operation on the string \helpref{UngetWriteBuf}{wxstringungetwritebuf} {\bf -must} be called! +\helpref{wxStringBuffer}{wxstringbuffer} +and \helpref{wxStringBufferLength}{wxstringbufferlength} classes may be very +useful when working with some external API which requires the caller to provide +a writable buffer. \helpref{Alloc}{wxstringalloc}\\ \helpref{Shrink}{wxstringshrink}\\ -\helpref{GetWriteBuf}{wxstringgetwritebuf}\\ -\helpref{UngetWriteBuf}{wxstringungetwritebuf} +\helpref{wxStringBuffer}{wxstringbuffer}\\ +\helpref{wxStringBufferLength}{wxstringbufferlength} + -\membersection{Miscellaneous} +\membersection{Miscellaneous}\label{miscellaneousinwxstring} Other string functions. \helpref{Trim}{wxstringtrim}\\ -\helpref{Pad}{wxstringpad}\\ -\helpref{Truncate}{wxstringtruncate} +\helpref{Truncate}{wxstringtruncate}\\ +\helpref{Pad}{wxstringpad} + -\membersection{wxWindows 1.xx compatiblity functions} +\membersection{wxWidgets 1.xx compatibility functions}\label{backwardcompatibilityinwxstring} -These functiosn are deprecated, please consider using new wxWindows 2.0 +These functions are deprecated, please consider using new wxWidgets 2.0 functions instead of them (or, even better, std::string compatible variants). -\helpref{SubString}{wxstringsubstring}\\ -\helpref{sprintf}{wxstringsprintf}\\ +% keep ordered alphabetically \helpref{CompareTo}{wxstringcompareto}\\ -\helpref{Length}{wxstringlength}\\ +\helpref{Contains}{wxstringcontains}\\ +\helpref{First}{wxstringfirst}\\ \helpref{Freq}{wxstringfreq}\\ -\helpref{LowerCase}{wxstringlowercase}\\ -\helpref{UpperCase}{wxstringuppercase}\\ -\helpref{Strip}{wxstringstrip}\\ \helpref{Index}{wxstringindex}\\ -\helpref{Remove}{wxstringremove}\\ -\helpref{First}{wxstringfirst}\\ -\helpref{Last}{wxstringlast}\\ -\helpref{Contains}{wxstringcontains}\\ -\helpref{IsNull}{wxstringisnull}\\ \helpref{IsAscii}{wxstringisascii}\\ +\helpref{IsNull}{wxstringisnull}\\ \helpref{IsNumber}{wxstringisnumber}\\ -\helpref{IsWord}{wxstringisword} +\helpref{IsWord}{wxstringisword}\\ +\helpref{Last}{wxstringlast}\\ +\helpref{Length}{wxstringlength}\\ +\helpref{LowerCase}{wxstringlowercase}\\ +\helpref{Remove}{wxstringremove}\\ +\helpref{Strip}{wxstringstrip}\\ +\helpref{SubString}{wxstringsubstring}\\ +\helpref{UpperCase}{wxstringuppercase} + -\membersection{std::string compatibility functions} +\membersection{std::string compatibility functions}\label{wxstringat} The supported functions are only listed here, please see any STL reference for their documentation. @@ -276,7 +345,7 @@ their documentation. // find first n characters of sz size_t find(const char* sz, size_t nStart = 0, size_t n = npos) const; - // find the first occurence of character ch after nStart + // find the first occurrence of character ch after nStart size_t find(char ch, size_t nStart = 0) const; // rfind() family is exactly like find() but works right to left @@ -290,7 +359,7 @@ their documentation. // as find, but from the end size_t rfind(char ch, size_t nStart = npos) const; - // find first/last occurence of any character in the set + // find first/last occurrence of any character in the set // size_t find_first_of(const wxString& str, size_t nStart = 0) const; @@ -305,7 +374,7 @@ their documentation. // same as rfind(char, size_t) size_t find_last_of (char c, size_t nStart = npos) const; - // find first/last occurence of any character not in the set + // find first/last occurrence of any character not in the set // size_t find_first_not_of(const wxString& str, size_t nStart = 0) const; @@ -347,33 +416,66 @@ their documentation. }} + \membersection{wxString::wxString}\label{wxstringconstruct} \func{}{wxString}{\void} -Default constructor. +Default constructor. Initializes the string to {\tt ""} (empty string). \func{}{wxString}{\param{const wxString\&}{ x}} Copy constructor. -\func{}{wxString}{\param{char}{ ch}, \param{size\_t}{ n = 1}} +\func{}{wxString}{\param{wxChar}{ ch}, \param{size\_t}{ n = 1}} Constructs a string of {\it n} copies of character {\it ch}. -\func{}{wxString}{\param{const char*}{ psz}, \param{size\_t}{ nLength = wxSTRING\_MAXLEN}} +\func{}{wxString}{\param{const wxChar*}{ 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 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 +the correct value for {\it nLength}. However, the default form of it works +only with strings without intermediate {\tt NUL}s because it uses +{\tt strlen()} to calculate the effective length and it would not give correct +results otherwise. \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. +For ANSI builds only (note the use of {\tt char} instead of {\tt wxChar}). + +\wxheading{Constructors with conversion} + +The following constructors allow you to construct wxString from a wide string +in ANSI build or from a C string in Unicode build. + +\func{}{wxString}{\param{const wchar\_t*}{ psz}, \param{wxMBConv\&}{ conv}, \param{size\_t}{ nLength = wxSTRING\_MAXLEN}} + +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. + +\func{}{wxString}{\param{const char*}{ psz}, \param{wxMBConv\&}{ conv = wxConvLibc}, \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 (the default converter uses current locale's +charset). It is ignored in ANSI build. -\func{}{wxString}{\param{const wchar\_t*}{ psz}} +\wxheading{See also} + +\helpref{wxMBConv classes}{mbconvclasses}, \helpref{mb\_str}{wxstringmbstr}, +\helpref{wc\_str}{wxstringwcstr} -Constructs a string from the wide (UNICODE) string. \membersection{wxString::\destruct{wxString}}\label{wxstringdestruct} @@ -381,6 +483,7 @@ Constructs a string from the wide (UNICODE) string. String destructor. Note that this is not virtual, so wxString must not be inherited from. + \membersection{wxString::Alloc}\label{wxstringalloc} \func{void}{Alloc}{\param{size\_t}{ nLen}} @@ -411,243 +514,385 @@ wxString DeleteAllVowels(const wxString& original) \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 \helpref{Truncate()}{wxstringtruncate} for this) even if its current length is greater than {\it nLen} + \membersection{wxString::Append}\label{wxstringappend} -\func{wxString\&}{Append}{\param{const char*}{ psz}} +\func{wxString\&}{Append}{\param{const wxChar*}{ psz}} Concatenates {\it psz} to this string, returning a reference to it. -\func{wxString\&}{Append}{\param{char}{ ch}, \param{int}{ count = 1}} +\func{wxString\&}{Append}{\param{wxChar}{ ch}, \param{int}{ count = 1}} Concatenates character {\it ch} to this string, {\it count} times, returning a reference to it. + \membersection{wxString::AfterFirst}\label{wxstringafterfirst} -\constfunc{wxString}{AfterFirst}{\param{char}{ ch}} +\constfunc{wxString}{AfterFirst}{\param{wxChar}{ ch}} -Gets all the characters after the first occurence of {\it ch}. +Gets all the characters after the first occurrence of {\it ch}. Returns the empty string if {\it ch} is not found. + \membersection{wxString::AfterLast}\label{wxstringafterlast} -\constfunc{wxString}{AfterLast}{\param{char}{ ch}} +\constfunc{wxString}{AfterLast}{\param{wxChar}{ ch}} -Gets all the characters after the last occurence of {\it ch}. +Gets all the characters after the last occurrence of {\it ch}. Returns the whole string if {\it ch} is not found. + \membersection{wxString::BeforeFirst}\label{wxstringbeforefirst} -\constfunc{wxString}{BeforeFirst}{\param{char}{ ch}} +\constfunc{wxString}{BeforeFirst}{\param{wxChar}{ ch}} -Gets all characters before the first occurence of {\it ch}. +Gets all characters before the first occurrence of {\it ch}. Returns the whole string if {\it ch} is not found. + \membersection{wxString::BeforeLast}\label{wxstringbeforelast} -\constfunc{wxString}{BeforeLast}{\param{char}{ ch}} +\constfunc{wxString}{BeforeLast}{\param{wxChar}{ ch}} -Gets all characters before the last occurence of {\it ch}. +Gets all characters before the last occurrence of {\it ch}. Returns the empty string if {\it ch} is not found. + +\membersection{wxString::c\_str}\label{wxstringcstr} + +\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). + +Note that the returned value is not convertible to {\tt char*} or +{\tt wchar\_t*}, use \helpref{char\_str}{wxstringcharstr} or +\helpref{wchar\_string}{wxstringwcharstr} if you need to pass string value +to a function expecting non-const pointer. + +\wxheading{See also} + +\helpref{mb\_str}{wxstringmbstr}, \helpref{wc\_str}{wxstringwcstr}, +\helpref{fn\_str}{wxstringfnstr}, \helpref{char\_str}{wxstringcharstr}, +\helpref{wchar\_string}{wxstringwcharstr} + +\membersection{wxString::char\_str}\label{wxstringcharstr} + +\constfunc{wxWritableCharBuffer}{char\_str}{\param{wxMBConv\&}{ conv = wxConvLibc}} + +Returns an object with string data that is implicitly convertible to +{\tt char*} pointer. Note that any change to the returned buffer is lost and so +this function is only usable for passing strings to legacy libraries that +don't have const-correct API. Use \helpref{wxStringBuffer}{wxstringbuffer} if +you want to modify the string. + +\wxheading{See also} + +\helpref{mb\_str}{wxstringmbstr}, \helpref{wc\_str}{wxstringwcstr}, +\helpref{fn\_str}{wxstringfnstr}, \helpref{c\_str}{wxstringcstr}, +\helpref{wchar\_str}{wxstringwcharstr} + + +\membersection{wxString::Clear}\label{wxstringclear} + +\func{void}{Clear}{\void} + +Empties the string and frees memory occupied by it. + +See also: \helpref{Empty}{wxstringempty} + + \membersection{wxString::Cmp}\label{wxstringcmp} -\constfunc{int}{Cmp}{\param{const char*}{ psz}} +\constfunc{int}{Cmp}{\param{const wxString\&}{ s}} + +\constfunc{int}{Cmp}{\param{const wxChar*}{ psz}} Case-sensitive comparison. Returns a positive value if the string is greater than the argument, zero if -it si equal to it or negative value if it is less than argument (same semantics +it is equal to it or a negative value if it is less than the argument (same semantics as the standard {\it strcmp()} function). See also \helpref{CmpNoCase}{wxstringcmpnocase}, \helpref{IsSameAs}{wxstringissameas}. + \membersection{wxString::CmpNoCase}\label{wxstringcmpnocase} -\constfunc{int}{CmpNoCase}{\param{const char*}{ psz}} +\constfunc{int}{CmpNoCase}{\param{const wxString\&}{ s}} + +\constfunc{int}{CmpNoCase}{\param{const wxChar*}{ psz}} Case-insensitive comparison. Returns a positive value if the string is greater than the argument, zero if -it si equal to it or negative value if it is less than argument (same semantics +it is equal to it or a negative value if it is less than the argument (same semantics as the standard {\it strcmp()} function). See also \helpref{Cmp}{wxstringcmp}, \helpref{IsSameAs}{wxstringissameas}. + \membersection{wxString::CompareTo}\label{wxstringcompareto} \begin{verbatim} -#define NO_POS ((int)(-1)) // undefined position -enum caseCompare {exact, ignoreCase}; +enum wxString::caseCompare {exact, ignoreCase}; \end{verbatim} - -\constfunc{int}{CompareTo}{\param{const char*}{ psz}, \param{caseCompare}{ cmp = exact}} + +\constfunc{int}{CompareTo}{\param{const wxChar*}{ psz}, \param{caseCompare}{ cmp = exact}} Case-sensitive comparison. Returns 0 if equal, 1 if greater or -1 if less. +This is a wxWidgets 1.xx compatibility function; use \helpref{Cmp}{wxstringcmp} instead. + + \membersection{wxString::Contains}\label{wxstringcontains} \constfunc{bool}{Contains}{\param{const wxString\&}{ str}} -Returns 1 if target appears anyhere in wxString; else 0. +Returns \true if target appears anywhere in wxString; else \false. + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + \membersection{wxString::Empty}\label{wxstringempty} \func{void}{Empty}{\void} -Reinitializes the string and frees the data. +Makes the string empty, but doesn't free memory occupied by the string. + +See also: \helpref{Clear()}{wxstringclear}. + \membersection{wxString::Find}\label{wxstringfind} -\constfunc{int}{Find}{\param{char}{ ch}, \param{bool}{ fromEnd = FALSE}} +\constfunc{int}{Find}{\param{wxUniChar}{ ch}, \param{bool}{ fromEnd = false}} + +Searches for the given character. Returns the starting index, or {\tt wxNOT\_FOUND} if not found. -Searches for the given character. Returns the starting index, or -1 if not found. +\constfunc{int}{Find}{\param{const wxString\&}{ sub}} -\constfunc{int}{Find}{\param{const char*}{ sz}} +Searches for the given string. Returns the starting index, or {\tt wxNOT\_FOUND} if not found. -Searches for the given string. Returns the starting index, or -1 if not found. \membersection{wxString::First}\label{wxstringfirst} -\func{size\_t}{First}{\param{char}{ c}} +\func{int}{First}{\param{wxChar}{ c}} + +\constfunc{int}{First}{\param{const wxChar*}{ psz}} + +\constfunc{int}{First}{\param{const wxString\&}{ str}} + +Same as \helpref{Find}{wxstringfind}. + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + + +\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} + -\constfunc{size\_t}{First}{\param{const char*}{ psz}} +\membersection{wxString::Format}\label{wxstringformat} -\constfunc{size\_t}{First}{\param{const wxString\&}{ str}} +\func{static wxString}{Format}{\param{const wxChar }{*format}, \param{}{...}} -\constfunc{size\_t}{First}{\param{const char}{ ch}} +This static function returns the string containing the result of calling +\helpref{Printf}{wxstringprintf} with the passed parameters on it. + +\wxheading{See also} + +\helpref{FormatV}{wxstringformatv}, \helpref{Printf}{wxstringprintf} + + +\membersection{wxString::FormatV}\label{wxstringformatv} + +\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. + +\wxheading{See also} + +\helpref{Format}{wxstringformat}, \helpref{PrintfV}{wxstringprintfv} -Returns the first occurrence of the item. \membersection{wxString::Freq}\label{wxstringfreq} -\constfunc{int}{Frec}{\param{char }{ch}} +\constfunc{int}{Freq}{\param{wxChar }{ch}} + +Returns the number of occurrences of {\it ch} in the string. + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + + +\membersection{wxString::FromAscii}\label{wxstringfromascii} + +\func{static wxString }{FromAscii}{\param{const char*}{ s}} + +\func{static wxString }{FromAscii}{\param{const char}{ c}} + +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 (note the use of {\tt char} instead of {\tt wxChar}). +Use \helpref{wxString constructors}{wxstringconstruct} if you +need to convert from another charset. -Returns the number of occurences of {it ch} in the string. \membersection{wxString::GetChar}\label{wxstringgetchar} -\constfunc{char}{GetChar}{\param{size\_t}{ n}} +\constfunc{wxChar}{GetChar}{\param{size\_t}{ n}} Returns the character at position {\it n} (read-only). + \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. -wxWindows compatibility conversion. Returns a constant pointer to the data in the string. \membersection{wxString::GetWritableChar}\label{wxstringgetwritablechar} -\func{char\&}{GetWritableChar}{\param{size\_t}{ n}} +\func{wxChar\&}{GetWritableChar}{\param{size\_t}{ n}} Returns a reference to the character at position {\it n}. + \membersection{wxString::GetWriteBuf}\label{wxstringgetwritebuf} -\func{char*}{GetWriteBuf}{\param{size\_t}{ len}} +\func{wxChar*}{GetWriteBuf}{\param{size\_t}{ len}} Returns a writable buffer of at least {\it len} bytes. +It returns a pointer to a new memory block, and the +existing data will not be copied. -Call \helpref{wxString::UngetWriteBuf}{wxstringungetwritebuf} as soon as possible -to put the string back into a reasonable state. +Call \helpref{wxString::UngetWriteBuf}{wxstringungetwritebuf} as soon as +possible to put the string back into a reasonable state. -\membersection{wxString::Index}\label{wxstringindex} +This method is deprecated, please use +\helpref{wxStringBuffer}{wxstringbuffer} or +\helpref{wxStringBufferLength}{wxstringbufferlength} instead. -\constfunc{size\_t}{Index}{\param{char}{ ch}, \param{int}{ startpos = 0}} -Same as \helpref{wxString::Find}{wxstringfind}. - -\constfunc{size\_t}{Index}{\param{const char*}{ sz}} - -Same as \helpref{wxString::Find}{wxstringfind}. +\membersection{wxString::Index}\label{wxstringindex} -\constfunc{size\_t}{Index}{\param{const char*}{ sz}, \param{bool}{ caseSensitive = TRUE}, \param{bool}{ fromEnd = FALSE}} +\constfunc{size\_t}{Index}{\param{wxChar}{ ch}} -Search the element in the array, starting from either side. +\constfunc{size\_t}{Index}{\param{const wxChar*}{ sz}} -If {\it fromEnd} is TRUE, reverse search direction. +Same as \helpref{wxString::Find}{wxstringfind}. -If {\bf caseSensitive}, comparison is case sensitive (the default). +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. -Returns the index of the first item matched, or NOT\_FOUND. -% TODO -%\membersection{wxString::insert}\label{wxstringinsert} -% Wrong! -%\func{void}{insert}{\param{const wxString\&}{ str}, \param{size\_t}{ index}} -% -%Add new element at the given position. -% \membersection{wxString::IsAscii}\label{wxstringisascii} \constfunc{bool}{IsAscii}{\void} -Returns TRUE if the string is ASCII. +Returns \true if the string contains only ASCII characters. + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + \membersection{wxString::IsEmpty}\label{wxstringisempty} \constfunc{bool}{IsEmpty}{\void} -Returns TRUE if the string is NULL. +Returns \true if the string is empty. + \membersection{wxString::IsNull}\label{wxstringisnull} \constfunc{bool}{IsNull}{\void} -Returns TRUE if the string is NULL (same as IsEmpty). +Returns \true if the string is empty (same as \helpref{IsEmpty}{wxstringisempty}). + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + \membersection{wxString::IsNumber}\label{wxstringisnumber} \constfunc{bool}{IsNumber}{\void} -Returns TRUE if the string is a number. +Returns \true if the string is an integer (with possible sign). + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + \membersection{wxString::IsSameAs}\label{wxstringissameas} -\constfunc{bool}{IsSameAs}{\param{const char*}{ psz}, \param{bool}{ caseSensitive = TRUE}} +\constfunc{bool}{IsSameAs}{\param{const wxChar*}{ psz}, \param{bool}{ caseSensitive = true}} Test for string equality, case-sensitive (default) or not. -caseSensitive is TRUE by default (case matters). +caseSensitive is \true by default (case matters). + +Returns \true if strings are equal, \false otherwise. + +See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase} + +\constfunc{bool}{IsSameAs}{\param{wxChar}{ c}, \param{bool}{ caseSensitive = true}} + +Test whether the string is equal to the single character {\it c}. The test is +case-sensitive if {\it caseSensitive} is \true (default) or not if it is \false. + +Returns \true if the string is equal to the character, \false otherwise. -Returns TRUE if strings are equal, FALSE otherwise. +See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase} -See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}. \membersection{wxString::IsWord}\label{wxstringisword} \constfunc{bool}{IsWord}{\void} -Returns TRUE if the string is a word. TODO: what's the definition of a word? +Returns \true if the string is a word. + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + \membersection{wxString::Last}\label{wxstringlast} -\constfunc{char}{Last}{\void} +\constfunc{wxChar}{Last}{\void} Returns the last character. -\func{char\&}{Last}{\void} +\func{wxChar\&}{Last}{\void} Returns a reference to the last character (writable). +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + + \membersection{wxString::Left}\label{wxstringleft} \constfunc{wxString}{Left}{\param{size\_t}{ count}} -Returns the first {\it count} characters. +Returns the first {\it count} characters of the string. -\constfunc{wxString}{Left}{\param{char}{ ch}} - -Returns all characters before the first occurence of {\it ch}. -Returns the whole string if {\it ch} is not found. \membersection{wxString::Len}\label{wxstringlen} @@ -655,41 +900,71 @@ Returns the whole string if {\it ch} is not found. Returns the length of the string. + \membersection{wxString::Length}\label{wxstringlength} \constfunc{size\_t}{Length}{\void} Returns the length of the string (same as Len). +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + + \membersection{wxString::Lower}\label{wxstringlower} \constfunc{wxString}{Lower}{\void} Returns this string converted to the lower case. + \membersection{wxString::LowerCase}\label{wxstringlowercase} \func{void}{LowerCase}{\void} Same as MakeLower. +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + + \membersection{wxString::MakeLower}\label{wxstringmakelower} -\func{void}{MakeLower}{\void} +\func{wxString\&}{MakeLower}{\void} + +Converts all characters to lower case and returns the result. -Converts all characters to lower case. \membersection{wxString::MakeUpper}\label{wxstringmakeupper} -\func{void}{MakeUpper}{\void} +\func{wxString\&}{MakeUpper}{\void} + +Converts all characters to upper case and returns the result. -Converts all characters to upper case. \membersection{wxString::Matches}\label{wxstringmatches} -\constfunc{bool}{Matches}{\param{const char*}{ szMask}} +\constfunc{bool}{Matches}{\param{const wxString\&}{ mask}} + +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 = wxConvLibc}} + +\constfunc{const wxCharBuffer}{mb\_str}{\param{wxMBConv\&}{ conv = wxConvLibc}} + +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}, \helpref{char\_str}{wxstringcharstr} -Returns TRUE if the string contents matches a mask containing '*' and '?'. \membersection{wxString::Mid}\label{wxstringmid} @@ -698,39 +973,57 @@ Returns TRUE if the string contents matches a mask containing '*' and '?'. Returns a substring starting at {\it first}, with length {\it count}, or the rest of the string if {\it count} is the default value. + \membersection{wxString::Pad}\label{wxstringpad} -\func{wxString\&}{Pad}{\param{size\_t}{ count}, \param{char}{ pad = ' '}, \param{bool}{ fromRight = TRUE}} +\func{wxString\&}{Pad}{\param{size\_t}{ count}, \param{wxChar}{ pad = ' '}, \param{bool}{ fromRight = true}} Adds {\it count} copies of {\it pad} to the beginning, or to the end of the string (the default). Removes spaces from the left or from the right (default). + \membersection{wxString::Prepend}\label{wxstringprepend} \func{wxString\&}{Prepend}{\param{const wxString\&}{ str}} Prepends {\it str} to this string, returning a reference to this string. + \membersection{wxString::Printf}\label{wxstringprintf} -\func{int}{Printf}{\param{const char* }{pszFormat}, \param{}{...}} +\func{int}{Printf}{\param{const wxChar* }{pszFormat}, \param{}{...}} 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 dangerous {\it vsprintf()} will be used then which may lead to buffer overflows. + \membersection{wxString::PrintfV}\label{wxstringprintfv} -\func{int}{PrintfV}{\param{const char* }{pszFormat}, \param{va\_list}{ argPtr}} +\func{int}{PrintfV}{\param{const wxChar* }{pszFormat}, \param{va\_list}{ argPtr}} Similar to vprintf. Returns the number of characters written, or an integer less than zero on error. + \membersection{wxString::Remove}\label{wxstringremove} \func{wxString\&}{Remove}{\param{size\_t}{ pos}} @@ -739,7 +1032,10 @@ Same as Truncate. Removes the portion from {\it pos} to the end of the string. \func{wxString\&}{Remove}{\param{size\_t}{ pos}, \param{size\_t}{ len}} -Removes the last {\it len} characters from the string, starting at {\it pos}. +Removes {\it len} characters from the string, starting at {\it pos}. + +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + \membersection{wxString::RemoveLast}\label{wxstringremovelast} @@ -747,33 +1043,32 @@ Removes the last {\it len} characters from the string, starting at {\it pos}. Removes the last character. + \membersection{wxString::Replace}\label{wxstringreplace} -\func{size\_t}{Replace}{\param{const char*}{ szOld}, \param{const char*}{ szNew}, \param{bool}{ replaceAll = TRUE}} +\func{size\_t}{Replace}{\param{const wxString\&}{ strOld}, \param{const wxString\&}{ strNew}, \param{bool}{ replaceAll = true}} -Replace first (or all) occurences of substring with another one. +Replace first (or all) occurrences of substring with another one. -{\it replaceAll}: global replace (default), or only the first occurence. +{\it replaceAll}: global replace (default), or only the first occurrence. Returns the number of replacements made. + \membersection{wxString::Right}\label{wxstringright} \constfunc{wxString}{Right}{\param{size\_t}{ count}} Returns the last {\it count} characters. -\constfunc{wxString}{Right}{\param{char}{ ch}} - -Returns all characters after the last occurence of {\it ch}. -Returns the whole string if {\it ch} is not found. \membersection{wxString::SetChar}\label{wxstringsetchar} -\func{void}{SetChar}{\param{size\_t}{ n}, \param{char}{ch}} +\func{void}{SetChar}{\param{size\_t}{ n}, \param{wxChar}{ch}} Sets the character at position {\it n}. + \membersection{wxString::Shrink}\label{wxstringshrink} \func{void}{Shrink}{\void} @@ -781,16 +1076,33 @@ Sets the character at position {\it n}. Minimizes the string's memory. This can be useful after a call to \helpref{Alloc()}{wxstringalloc} if too much memory were preallocated. -\membersection{wxString::sprintf}\label{wxstringsprintf} -\func{void}{sprintf}{\param{const char* }{ fmt}} +\membersection{wxString::StartsWith}\label{wxstringstartswith} + +\constfunc{bool}{StartsWith}{\param{const wxChar }{*prefix}, \param{wxString }{*rest = NULL}} + +This function can be used to test if the string starts with the specified +{\it prefix}. If it does, the function will return \true and put the rest +of the string (i.e. after the prefix) into {\it rest} string if it is not +{\tt NULL}. Otherwise, the function returns \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 \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 \false and doesn't +modify the {\it rest}. -The same as Printf. \membersection{wxString::Strip}\label{wxstringstrip} \begin{verbatim} -enum stripType {leading = 0x1, trailing = 0x2, both = 0x3}; +enum wxString::stripType {leading = 0x1, trailing = 0x2, both = 0x3}; \end{verbatim} \constfunc{wxString}{Strip}{\param{stripType}{ s = trailing}} @@ -798,17 +1110,128 @@ enum stripType {leading = 0x1, trailing = 0x2, both = 0x3}; Strip characters at the front and/or end. The same as Trim except that it doesn't change this string. +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + + \membersection{wxString::SubString}\label{wxstringsubstring} -\constfunc{wxString}{SubString}{\param{size\_t}{ to}, \param{size\_t}{ from}} +\constfunc{wxString}{SubString}{\param{size\_t}{ from}, \param{size\_t}{ to}} + +Returns the part of the string between the indices {\it from} and {\it to} +inclusive. + +This is a wxWidgets 1.xx compatibility function, use \helpref{Mid}{wxstringmid} +instead (but note that parameters have different meaning). + + +\membersection{wxString::ToAscii}\label{wxstringtoascii} + +\constfunc{const char*}{ToAscii}{\void} + +Converts the string to an ASCII, 7-bit string (ANSI builds only). + +\constfunc{const wxCharBuffer}{ToAscii}{\void} + +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}} + +Attempts to convert the string to a floating point number. Returns \true on +success (the number is stored in the location pointed to by {\it val}) or \false +if the string does not represent such number. + +\wxheading{See also} + +\helpref{wxString::ToLong}{wxstringtolong},\\ +\helpref{wxString::ToULong}{wxstringtoulong} + + +\membersection{wxString::ToLong}\label{wxstringtolong} + +\constfunc{bool}{ToLong}{\param{long}{ *val}, \param{int }{base = $10$}} + +Attempts to convert the string to a signed integer in base {\it base}. Returns +\true on success in which case the number is stored in the location +pointed to by {\it val} or \false if the string does not represent a +valid number in the given base. + +The value of {\it base} must be comprised between $2$ and $36$, inclusive, or +be a special value $0$ which means that the usual rules of {\tt C} numbers are +applied: if the number starts with {\tt 0x} it is considered to be in base +$16$, if it starts with {\tt 0} - in base $8$ and in base $10$ otherwise. Note +that you may not want to specify the base $0$ if you are parsing the numbers +which may have leading zeroes as they can yield unexpected (to the user not +familiar with C) results. + +\wxheading{See also} + +\helpref{wxString::ToDouble}{wxstringtodouble},\\ +\helpref{wxString::ToULong}{wxstringtoulong} + + +\membersection{wxString::ToLongLong}\label{wxstringtolonglong} + +\constfunc{bool}{ToLongLong}{\param{wxLongLong\_t}{ *val}, \param{int }{base = $10$}} + +This is exactly the same as \helpref{ToLong}{wxstringtolong} but works with 64 +bit integer numbers. + +Notice that currently it doesn't work (always returns \false) if parsing of 64 +bit numbers is not supported by the underlying C run-time library. Compilers +with C99 support and Microsoft Visual C++ version 7 and higher do support this. + +\wxheading{See also} + +\helpref{wxString::ToLong}{wxstringtolong},\\ +\helpref{wxString::ToULongLong}{wxstringtoulonglong} + + +\membersection{wxString::ToULong}\label{wxstringtoulong} + +\constfunc{bool}{ToULong}{\param{unsigned long}{ *val}, \param{int }{base = $10$}} + +Attempts to convert the string to an unsigned integer in base {\it base}. +Returns \true on success in which case the number is stored in the +location pointed to by {\it val} or \false if the string does not +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. + +\wxheading{See also} + +\helpref{wxString::ToDouble}{wxstringtodouble},\\ +\helpref{wxString::ToLong}{wxstringtolong} + + +\membersection{wxString::ToULongLong}\label{wxstringtoulonglong} + +\constfunc{bool}{ToULongLong}{\param{wxULongLong\_t}{ *val}, \param{int }{base = $10$}} + +This is exactly the same as \helpref{ToULong}{wxstringtoulong} but works with 64 +bit integer numbers. + +Please see \helpref{ToLongLong}{wxstringtolonglong} for additional remarks. -Same as \helpref{Mid}{wxstringmid}. \membersection{wxString::Trim}\label{wxstringtrim} -\func{wxString\&}{Trim}{\param{bool}{ fromRight = TRUE}} +\func{wxString\&}{Trim}{\param{bool}{ fromRight = true}} + +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). -Removes spaces from the left or from the right (default). \membersection{wxString::Truncate}\label{wxstringtruncate} @@ -816,97 +1239,156 @@ Removes spaces from the left or from the right (default). Truncate the string to the given length. + \membersection{wxString::UngetWriteBuf}\label{wxstringungetwritebuf} \func{void}{UngetWriteBuf}{\void} -Puts the string back into a reasonable state, after +\func{void}{UngetWriteBuf}{\param{size\_t }{len}} + +Puts the string back into a reasonable state (in which it can be used +normally), after \rtfsp\helpref{wxString::GetWriteBuf}{wxstringgetwritebuf} was called. +The version of the function without the {\it len} parameter will calculate the +new string length itself assuming that the string is terminated by the first +{\tt NUL} character in it while the second one will use the specified length +and thus is the only version which should be used with the strings with +embedded {\tt NUL}s (it is also slightly more efficient as {\tt strlen()} +doesn't have to be called). + +This method is deprecated, please use +\helpref{wxStringBuffer}{wxstringbuffer} or +\helpref{wxStringBufferLength}{wxstringbufferlength} instead. + + \membersection{wxString::Upper}\label{wxstringupper} \constfunc{wxString}{Upper}{\void} Returns this string converted to upper case. + \membersection{wxString::UpperCase}\label{wxstringuppercase} \func{void}{UpperCase}{\void} The same as MakeUpper. +This is a wxWidgets 1.xx compatibility function; you should not use it in new code. + + +\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}, \helpref{wchar\_str}{wxstringwcharstr} + +\membersection{wxString::wchar\_str}\label{wxstringwcharstr} + +\constfunc{wxWritableWCharBuffer}{wchar\_str}{\void} + +Returns an object with string data that is implicitly convertible to +{\tt char*} pointer. Note that any change to the returned buffer is lost and so +this function is only usable for passing strings to legacy libraries that +don't have const-correct API. Use \helpref{wxStringBuffer}{wxstringbuffer} if +you want to modify the string. + +\wxheading{See also} + +\helpref{mb\_str}{wxstringmbstr}, \helpref{wc\_str}{wxstringwcstr}, +\helpref{fn\_str}{wxstringfnstr}, \helpref{c\_str}{wxstringcstr}, +\helpref{char\_str}{wxstringcharstr} + + \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 +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 wxChar *} pointer and emptiness of the string to look the same in the code and makes it easier to port old code to wxString. See also \helpref{IsEmpty()}{wxstringisempty}. + \membersection{wxString::operator $=$}\label{wxstringoperatorassign} \func{wxString\&}{operator $=$}{\param{const wxString\&}{ str}} -\func{wxString\&}{operator $=$}{\param{const char*}{ psz}} +\func{wxString\&}{operator $=$}{\param{const wxChar*}{ psz}} -\func{wxString\&}{operator $=$}{\param{char}{ c}} - -\func{wxString\&}{operator $=$}{\param{const unsigned char*}{ psz}} - -\func{wxString\&}{operator $=$}{\param{const wchar\_t*}{ pwz}} +\func{wxString\&}{operator $=$}{\param{wxChar}{ c}} Assignment: the effect of each operation is the same as for the corresponding constructor (see \helpref{wxString constructors}{wxstringconstruct}). -\membersection{operator wxString::$+$}\label{wxstringoperatorplus} -Concatenation: all these operators return a new strign equal to the sum of the -operands. +\membersection{wxString::operator $+$}\label{wxstringoperatorplus} + +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}} -\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{const char*}{ y}} +\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{const wxChar*}{ y}} -\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{char}{ y}} +\func{wxString}{operator $+$}{\param{const wxString\&}{ x}, \param{wxChar}{ y}} + +\func{wxString}{operator $+$}{\param{const wxChar*}{ x}, \param{const wxString\&}{ y}} -\func{wxString}{operator $+$}{\param{const char*}{ x}, \param{const wxString\&}{ y}} \membersection{wxString::operator $+=$}\label{wxstringplusequal} \func{void}{operator $+=$}{\param{const wxString\&}{ str}} -\func{void}{operator $+=$}{\param{const char*}{ psz}} +\func{void}{operator $+=$}{\param{const wxChar*}{ psz}} -\func{void}{operator $+=$}{\param{char}{ c}} +\func{void}{operator $+=$}{\param{wxChar}{ c}} Concatenation in place: the argument is appended to the string. + \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. + \membersection{wxString::operator ()}\label{wxstringoperatorparenth} \func{wxString}{operator ()}{\param{size\_t}{ start}, \param{size\_t}{ len}} Same as Mid (substring extraction). + \membersection{wxString::operator \cinsert}\label{wxstringoperatorout} \func{wxString\&}{operator \cinsert}{\param{const wxString\&}{ str}} -\func{wxString\&}{operator \cinsert}{\param{const char*}{ psz}} +\func{wxString\&}{operator \cinsert}{\param{const wxChar*}{ psz}} -\func{wxString\&}{operator \cinsert}{\param{char }{ch}} +\func{wxString\&}{operator \cinsert}{\param{wxChar }{ch}} Same as $+=$. @@ -920,45 +1402,192 @@ These functions work as C++ stream insertion operators: they insert the given value into the string. Precision or format cannot be set using them, you can use \helpref{Printf}{wxstringprintf} for this. + \membersection{wxString::operator \cextract}\label{wxstringoperatorin} \func{friend istream\&}{operator \cextract}{\param{istream\&}{ is}, \param{wxString\&}{ str}} Extraction from a stream. -\membersection{wxString::operator const char*}\label{wxstringoperatorconstcharpt} -\constfunc{}{operator const char*}{\void} +\membersection{wxString::operator const wxChar*}\label{wxstringoperatorconstcharpt} + +\constfunc{}{operator const wxChar*}{\void} Implicit conversion to a C string. + \membersection{Comparison operators}\label{wxstringcomparison} \func{bool}{operator $==$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}} -\func{bool}{operator $==$}{\param{const wxString\&}{ x}, \param{const char*}{ t}} +\func{bool}{operator $==$}{\param{const wxString\&}{ x}, \param{const wxChar*}{ t}} \func{bool}{operator $!=$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}} -\func{bool}{operator $!=$}{\param{const wxString\&}{ x}, \param{const char*}{ t}} +\func{bool}{operator $!=$}{\param{const wxString\&}{ x}, \param{const wxChar*}{ t}} \func{bool}{operator $>$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}} -\func{bool}{operator $>$}{\param{const wxString\&}{ x}, \param{const char*}{ t}} +\func{bool}{operator $>$}{\param{const wxString\&}{ x}, \param{const wxChar*}{ t}} \func{bool}{operator $>=$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}} -\func{bool}{operator $>=$}{\param{const wxString\&}{ x}, \param{const char*}{ t}} +\func{bool}{operator $>=$}{\param{const wxString\&}{ x}, \param{const wxChar*}{ t}} \func{bool}{operator $<$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}} -\func{bool}{operator $<$}{\param{const wxString\&}{ x}, \param{const char*}{ t}} +\func{bool}{operator $<$}{\param{const wxString\&}{ x}, \param{const wxChar*}{ t}} \func{bool}{operator $<=$}{\param{const wxString\&}{ x}, \param{const wxString\&}{ y}} -\func{bool}{operator $<=$}{\param{const wxString\&}{ x}, \param{const char*}{ t}} +\func{bool}{operator $<=$}{\param{const wxString\&}{ x}, \param{const wxChar*}{ t}} \wxheading{Remarks} These comparisons are case-sensitive. + +\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 of forgetting to restore +the string to the usable state later. + +For example, assuming you have a low-level OS function called +{\tt GetMeaningOfLifeAsString(char *)} returning the value in the provided +buffer (which must be writable, of course) you might call it like this: + +\begin{verbatim} + wxString theAnswer; + GetMeaningOfLifeAsString(wxStringBuffer(theAnswer, 1024)); + 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. + +\wxheading{Derived from} + +None + +\wxheading{Include files} + + + +\latexignore{\rtfignore{\wxheading{Members}}} + + +\membersection{wxStringBuffer::wxStringBuffer}\label{wxstringbufferctor} + +\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{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 *}\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} + + + +\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} + +\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. + +