X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7335902d0f14c2887a873f2724fb3619f4864be4..2c6f14e1a7b5062fcf77eda40824d820d9ac288e:/docs/latex/wx/wxstring.tex

diff --git a/docs/latex/wx/wxstring.tex b/docs/latex/wx/wxstring.tex
index bf9a52fddc..b81b116412 100644
--- a/docs/latex/wx/wxstring.tex
+++ b/docs/latex/wx/wxstring.tex
@@ -8,6 +8,14 @@ These standard functions are not documented in this manual so please see the STL
 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 wxWindows
+starts using it instead of wxString.
+
 \wxheading{Derived from}
 
 None
@@ -30,7 +38,7 @@ Objects:
 
 \membersection{Constructors and assignment operators}
 
-A strign may be constructed either from a C string, (some number of copies of)
+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.
@@ -55,7 +63,7 @@ or empty it.
 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.
 
@@ -92,7 +100,7 @@ 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)
+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:
@@ -101,7 +109,7 @@ 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
+doing direct string comparison as you would also have to precalculate the
 length of the prefix then.
 
 \helpref{Cmp}{wxstringcmp}\\
@@ -129,7 +137,7 @@ substring.
 \membersection{Case conversion}
 
 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}\\
@@ -149,7 +157,7 @@ functions.
 
 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
+put the numeric value in and return true if the {\bf entire} string could be
 converted to a number.
 
 \helpref{ToLong}{wxstringtolong}\\
@@ -181,7 +189,7 @@ formatted value to a string:
 
 \membersection{Memory management}
 
-These are "advanced" functions and they will be needed quite rarily. 
+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
@@ -567,7 +575,7 @@ See also: \helpref{Clear()}{wxstringclear}.
 
 \membersection{wxString::Find}\label{wxstringfind}
 
-\constfunc{int}{Find}{\param{char}{ ch}, \param{bool}{ fromEnd = FALSE}}
+\constfunc{int}{Find}{\param{char}{ ch}, \param{bool}{ fromEnd = false}}
 
 Searches for the given character. Returns the starting index, or -1 if not found.
 
@@ -577,15 +585,13 @@ 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}}
-
-\constfunc{size\_t}{First}{\param{const char*}{ psz}}
+\func{int}{First}{\param{char}{ c}}
 
-\constfunc{size\_t}{First}{\param{const wxString\&}{ str}}
+\constfunc{int}{First}{\param{const char*}{ psz}}
 
-\constfunc{size\_t}{First}{\param{const char}{ ch}}
+\constfunc{int}{First}{\param{const wxString\&}{ str}}
 
-Returns the first occurrence of the item.
+Same as \helpref{Find}{wxstringfind}.
 
 \membersection{wxString::Format}\label{wxstringformat}
 
@@ -635,32 +641,32 @@ 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.
 
 \membersection{wxString::Index}\label{wxstringindex}
 
-\constfunc{size\_t}{Index}{\param{char}{ ch}, \param{int}{ startpos = 0}}
-
-Same as \helpref{wxString::Find}{wxstringfind}.
+\constfunc{size\_t}{Index}{\param{char}{ ch}}
 
 \constfunc{size\_t}{Index}{\param{const char*}{ sz}}
 
 Same as \helpref{wxString::Find}{wxstringfind}.
 
-\constfunc{size\_t}{Index}{\param{const char*}{ sz}, \param{bool}{ caseSensitive = TRUE}, \param{bool}{ fromEnd = FALSE}}
+\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 {\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 NOT\_FOUND.
+Returns the index of the first item matched, or wxNOT\_FOUND.
 
 % TODO
 %\membersection{wxString::insert}\label{wxstringinsert}
@@ -673,46 +679,46 @@ Returns the index of the first item matched, or NOT\_FOUND.
 
 \constfunc{bool}{IsAscii}{\void}
 
-Returns TRUE if the string is ASCII.
+Returns true if the string contains only ASCII characters.
 
 \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}).
 
 \membersection{wxString::IsNumber}\label{wxstringisnumber}
 
 \constfunc{bool}{IsNumber}{\void}
 
-Returns TRUE if the string is a positive or negative integer. Will return FALSE for decimals.
+Returns true if the string is an integer (with possible sign).
 
 \membersection{wxString::IsSameAs}\label{wxstringissameas}
 
-\constfunc{bool}{IsSameAs}{\param{const char*}{ psz}, \param{bool}{ caseSensitive = TRUE}}
+\constfunc{bool}{IsSameAs}{\param{const char*}{ 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.
+Returns true if strings are equal, false otherwise.
 
 See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}, \helpref{IsSameAs}{wxstringissameas2}
 
 \membersection{wxString::IsSameAs}\label{wxstringissameas2}
 
-\constfunc{bool}{IsSameAs}{\param{char}{ c}, \param{bool}{ caseSensitive = TRUE}}
+\constfunc{bool}{IsSameAs}{\param{char}{ 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.
+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 the string is equal to the character, false otherwise.
 
 See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}, \helpref{IsSameAs}{wxstringissameas}
 
@@ -720,7 +726,7 @@ See also \helpref{Cmp}{wxstringcmp}, \helpref{CmpNoCase}{wxstringcmpnocase}, \he
 
 \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. TODO: what's the definition of a word?
 
 \membersection{wxString::Last}\label{wxstringlast}
 
@@ -736,12 +742,7 @@ Returns a reference to the last character (writable).
 
 \constfunc{wxString}{Left}{\param{size\_t}{ count}}
 
-Returns the first {\it count} characters.
-
-\constfunc{wxString}{Left}{\param{char}{ ch}}
-
-Returns all characters before the first occurrence of {\it ch}.
-Returns the whole string if {\it ch} is not found.
+Returns the first {\it count} characters of the string.
 
 \membersection{wxString::Len}\label{wxstringlen}
 
@@ -769,21 +770,21 @@ Same as MakeLower.
 
 \membersection{wxString::MakeLower}\label{wxstringmakelower}
 
-\func{void}{MakeLower}{\void}
+\func{wxString\&}{MakeLower}{\void}
 
-Converts all characters to lower case.
+Converts all characters to lower case and returns the result.
 
 \membersection{wxString::MakeUpper}\label{wxstringmakeupper}
 
-\func{void}{MakeUpper}{\void}
+\func{wxString\&}{MakeUpper}{\void}
 
-Converts all characters to upper case.
+Converts all characters to upper case and returns the result.
 
 \membersection{wxString::Matches}\label{wxstringmatches}
 
 \constfunc{bool}{Matches}{\param{const char*}{ szMask}}
 
-Returns TRUE if the string contents matches a mask containing '*' and '?'.
+Returns true if the string contents matches a mask containing '*' and '?'.
 
 \membersection{wxString::Mid}\label{wxstringmid}
 
@@ -794,7 +795,7 @@ 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{char}{ pad = ' '}, \param{bool}{ fromRight = true}}
 
 Adds {\it count} copies of {\it pad} to the beginning, or to the end of the string (the default).
 
@@ -843,7 +844,7 @@ 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 char*}{ szOld}, \param{const char*}{ szNew}, \param{bool}{ replaceAll = true}}
 
 Replace first (or all) occurrences of substring with another one.
 
@@ -881,9 +882,9 @@ The same as Printf.
 \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
+{\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 
+{\tt NULL}. Otherwise, the function returns {\tt false} and doesn't modify the 
 {\it rest}.
 
 \membersection{wxString::Strip}\label{wxstringstrip}
@@ -911,8 +912,8 @@ inclusive.
 
 \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
+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}
@@ -922,11 +923,20 @@ if the string does not represent such number.
 
 \membersection{wxString::ToLong}\label{wxstringtolong}
 
-\constfunc{bool}{ToLong}{\param{long}{ *val}}
+\constfunc{bool}{ToLong}{\param{long}{ *val}, \param{int }{base = $10$}}
+
+Attempts to convert the string to a signed 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.
 
-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.
+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}
 
@@ -935,11 +945,15 @@ string does not represent such number.
 
 \membersection{wxString::ToULong}\label{wxstringtoulong}
 
-\constfunc{bool}{ToULong}{\param{unsigned long}{ *val}}
+\constfunc{bool}{ToULong}{\param{unsigned long}{ *val}, \param{int }{base = $10$}}
 
-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.
+Attempts to convert the string to a ansigned 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.
+
+See \helpref{wxString::ToLong}{wxstringtolong} for the more detailed
+description of the {\it base} parameter.
 
 \wxheading{See also}
 
@@ -948,7 +962,7 @@ string does not represent such number.
 
 \membersection{wxString::Trim}\label{wxstringtrim}
 
-\func{wxString\&}{Trim}{\param{bool}{ fromRight = TRUE}}
+\func{wxString\&}{Trim}{\param{bool}{ fromRight = true}}
 
 Removes spaces from the left or from the right (default).
 
@@ -962,9 +976,19 @@ Truncate the string to the given length.
 
 \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).
+
 \membersection{wxString::Upper}\label{wxstringupper}
 
 \constfunc{wxString}{Upper}{\void}
@@ -981,7 +1005,7 @@ The same as MakeUpper.
 
 \constfunc{bool}{operator!}{\void}
 
-Empty string is FALSE, so !string will only return TRUE if the string is empty.
+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
 of the string to look the same in the code and makes it easier to port old code
 to wxString.
@@ -1104,3 +1128,57 @@ Implicit conversion to a C string.
 
 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 to forget 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}
+
+\wxheading{Derived from}
+
+None
+
+\wxheading{Include files}
+
+<wx/string.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxStringBuffer::wxStringBuffer}
+
+\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}}
+
+\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 *}
+
+\constfunc{wxChar *}{operator wxChar *}{\void}
+
+Returns the writable pointer to a buffer of the size at least equal to the
+length specified in the constructor.
+
+
