X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f33fee2ae6f5b5a2e8403fb037bd79072e973542..d82323930c8ce1b800f2213a598fbda79f868d1d:/docs/latex/wx/wxstring.tex diff --git a/docs/latex/wx/wxstring.tex b/docs/latex/wx/wxstring.tex index 5aa5d9d4a5..94157dacf4 100644 --- a/docs/latex/wx/wxstring.tex +++ b/docs/latex/wx/wxstring.tex @@ -93,16 +93,22 @@ 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. +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 comparaison 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} \membersection{Substring extraction} @@ -117,7 +123,8 @@ substring. \helpref{BeforeFirst}{wxstringbeforefirst}\\ \helpref{BeforeLast}{wxstringbeforelast}\\ \helpref{AfterFirst}{wxstringafterfirst}\\ -\helpref{AfterLast}{wxstringafterlast} +\helpref{AfterLast}{wxstringafterlast}\\ +\helpref{StartsWith}{wxstringstartswith} \membersection{Case conversion} @@ -138,11 +145,36 @@ functions. \helpref{Find}{wxstringfind}\\ \helpref{Replace}{wxstringreplace} +\membersection{Conversion to numbers} + +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{ToULong}{wxstringtoulong}\\ +\helpref{ToDouble}{wxstringtodouble} + \membersection{Writing values into the string} 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} @@ -171,9 +203,9 @@ Other string functions. \helpref{Pad}{wxstringpad}\\ \helpref{Truncate}{wxstringtruncate} -\membersection{wxWindows 1.xx compatiblity functions} +\membersection{wxWindows 1.xx compatibility functions} -These functiosn are deprecated, please consider using new wxWindows 2.0 +These functions are deprecated, please consider using new wxWindows 2.0 functions instead of them (or, even better, std::string compatible variants). \helpref{SubString}{wxstringsubstring}\\ @@ -370,7 +402,14 @@ Constructs a string of {\it n} copies of character {\it ch}. \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 take all the string. +The default value of 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}} @@ -484,7 +523,7 @@ See also: \helpref{Empty}{wxstringempty} 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}. @@ -496,7 +535,7 @@ See also \helpref{CmpNoCase}{wxstringcmpnocase}, \helpref{IsSameAs}{wxstringissa 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}. @@ -548,11 +587,33 @@ Searches for the given string. Returns the starting index, or -1 if not found. Returns the first occurrence of the item. +\membersection{wxString::Format}\label{wxstringformat} + +\func{static wxString}{Format}{\param{const wxChar }{*format}, \param{}{...}} + +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}{Format}{\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} + \membersection{wxString::Freq}\label{wxstringfreq} -\constfunc{int}{Frec}{\param{char }{ch}} +\constfunc{int}{Freq}{\param{char }{ch}} -Returns the number of occurences of {it ch} in the string. +Returns the number of occurrences of {\it ch} in the string. \membersection{wxString::GetChar}\label{wxstringgetchar} @@ -630,7 +691,7 @@ Returns TRUE if the string is NULL (same as IsEmpty). \constfunc{bool}{IsNumber}{\void} -Returns TRUE if the string is a number. +Returns TRUE if the string is a positive or negative integer. Will return FALSE for decimals. \membersection{wxString::IsSameAs}\label{wxstringissameas} @@ -772,7 +833,7 @@ 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 the {\it len} characters from the string, starting at {\it pos}. \membersection{wxString::RemoveLast}\label{wxstringremovelast} @@ -815,6 +876,16 @@ Minimizes the string's memory. This can be useful after a call to The same as Printf. +\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 {\tt 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 {\tt FALSE} and doesn't modify the +{\it rest}. + \membersection{wxString::Strip}\label{wxstringstrip} \begin{verbatim} @@ -828,10 +899,49 @@ doesn't change this string. \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}} Same as \helpref{Mid}{wxstringmid}. +\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}} + +Attempts to convert the string to a signed integer. 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::ToDouble}{wxstringtodouble},\\ +\helpref{wxString::ToULong}{wxstringtoulong} + +\membersection{wxString::ToULong}\label{wxstringtoulong} + +\constfunc{bool}{ToULong}{\param{unsigned long}{ *val}} + +Attempts to convert the string to an unsigned integer. 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::ToDouble}{wxstringtodouble},\\ +\helpref{wxString::ToLong}{wxstringtolong} + \membersection{wxString::Trim}\label{wxstringtrim} \func{wxString\&}{Trim}{\param{bool}{ fromRight = TRUE}} @@ -889,7 +999,7 @@ See also \helpref{IsEmpty()}{wxstringisempty}. Assignment: the effect of each operation is the same as for the corresponding constructor (see \helpref{wxString constructors}{wxstringconstruct}). -\membersection{operator wxString::$+$}\label{wxstringoperatorplus} +\membersection{wxString::operator $+$}\label{wxstringoperatorplus} Concatenation: all these operators return a new strign equal to the sum of the operands.