support for huge files (patch 1002226)

[wxWidgets.git] / docs / latex / wx / regex.tex

diff --git a/docs/latex/wx/regex.tex b/docs/latex/wx/regex.tex
index 6473168c1526fc19eaeec21f87a1f4953a8e1c02..c2ee1eab52a1b176c379d6dd739ebab237942ca9 100644 (file)
--- a/docs/latex/wx/regex.tex
+++ b/docs/latex/wx/regex.tex
@@ -6,43 +6,34 @@
 %% Created:     14.07.01
 %% RCS-ID:      $Id$
 %% Copyright:   (c) 2001 Vadim Zeitlin
-%% License:     wxWindows license
+%% License:     wxWidgets license
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \section{\class{wxRegEx}}\label{wxregex}
 
-wxRegEx represents a regular expression. The regular expressions syntax
-supported is the POSIX one. Both basic and extended regular expressions are
-supported but, unlike POSIX C API, the extended ones are used by default.
+wxRegEx represents a regular expression.  This class provides support
+for regular expressions matching and also replacement.
 
-This class provides support for regular expressions matching and also
-replacement. It is built on top of either the system library (if it has support
-for POSIX regular expressions - which is the case of the most modern Unices) or
-uses the built in Henry Spencer's library. In the latter case you need to abide
-by the terms of its copyright:
+It is built on top of either the system library (if it has support
+for POSIX regular expressions - which is the case of the most modern
+Unices) or uses the built in Henry Spencer's library.  Henry Spencer
+would appreciate being given credit in the documentation of software
+which uses his library, but that is not a requirement.
 
-\begin{verbatim}
-Copyright 1992, 1993, 1994, 1997 Henry Spencer.  All rights reserved.
-This software is not subject to any license of the American Telephone
-and Telegraph Company or of the Regents of the University of California.
-
-Permission is granted to anyone to use this software for any purpose on
-any computer system, and to alter it and redistribute it, subject
-to the following restrictions:
-
-1. The author is not responsible for the consequences of use of this
-   software, no matter how awful, even if they arise from flaws in it.
+Regular expressions, as defined by POSIX, come in two flavours: {\it extended}
+and {\it basic}.  The builtin library also adds a third flavour
+of expression \helpref{advanced}{wxresyn}, which is not available
+when using the system library.
 
-2. The origin of this software must not be misrepresented, either by
-   explicit claim or by omission.  Since few users ever read sources,
-   credits must appear in the documentation.
+Unicode is fully supported only when using the builtin library.
+When using the system library in Unicode mode, the expressions and data
+are translated to the default 8-bit encoding before being passed to
+the library.
 
-3. Altered versions must be plainly marked as such, and must not be
-   misrepresented as being the original software.  Since few users
-   ever read sources, credits must appear in the documentation.
-
-4. This notice may not be removed or altered.
-\end{verbatim}
+On platforms where a system library is available, the default is to use
+the builtin library for Unicode builds, and the system library otherwise.
+It is possible to use the other if preferred by selecting it when building
+the wxWidgets.
 
 \wxheading{Derived from}
 
@@ -55,8 +46,13 @@ Flags for regex compilation to be used with \helpref{Compile()}{wxregexcompile}:
 \begin{verbatim}
 enum
 {
-    // use extended regex syntax (default)
+    // use extended regex syntax
     wxRE_EXTENDED = 0,
+    
+    // use advanced RE syntax (built-in regex only)
+#ifdef wxHAS_REGEX_ADVANCED
+    wxRE_ADVANCED = 1,
+#endif
 
     // use basic RE syntax
     wxRE_BASIC    = 2,
@@ -102,19 +98,19 @@ is bad because the real email addresses can have more complicated form than
 \begin{verbatim}
 wxString text;
 ...
-wxRegEx reEmail = "([^@]+)@([[:alnum:].-_].)+([[:alnum:]]+)";
+wxRegEx reEmail = wxT("([^@]+)@([[:alnum:].-_].)+([[:alnum:]]+)");
 if ( reEmail.Matches(text) )
 {
     wxString text = reEmail.GetMatch(email);
     wxString username = reEmail.GetMatch(email, 1);
-    if ( reEmail.GetMatch(email, 3) == "com" ) // .com TLD?
+    if ( reEmail.GetMatch(email, 3) == wxT("com") ) // .com TLD?
     {
         ...
     }
 }
 
 // or we could do this to hide the email address
-size_t count = reEmail.ReplaceAll(text, "HIDDEN@\\2\\3");
+size_t count = reEmail.ReplaceAll(text, wxT("HIDDEN@\\2\\3"));
 printf("text now contains %u hidden addresses", count);
 \end{verbatim}
 
@@ -174,6 +170,16 @@ May only be called after successful call to \helpref{Matches()}{wxregexmatches}
 and only if {\tt wxRE\_NOSUB} was {\bf not} used in 
 \helpref{Compile()}{wxregexcompile}.
 
+\membersection{wxRegEx::GetMatchCount}\label{wxregexgetmatchcount}
+
+\constfunc{size\_t}{GetMatchCount}{\void}
+
+Returns the size of the array of matches, i.e. the number of bracketed
+subexpressions plus one for the expression itself, or $0$ on error.
+
+May only be called after successful call to \helpref{Compile()}{wxregexcompile}.
+and only if {\tt wxRE\_NOSUB} was {\bf not} used.
+
 \membersection{wxRegEx::Matches}\label{wxregexmatches}
 
 \constfunc{bool}{Matches}{\param{const wxChar* }{text}, \param{int }{flags = 0}}