X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d3c0ce340237e30bbc03e0e419d5a6d97a04dac6..d6f2fae8e61d2a268e6f2c57d2905f219faf7c37:/docs/latex/wx/file.tex?ds=inline

diff --git a/docs/latex/wx/file.tex b/docs/latex/wx/file.tex
index 4f8ac4bafc..bc58192219 100644
--- a/docs/latex/wx/file.tex
+++ b/docs/latex/wx/file.tex
@@ -19,6 +19,10 @@ its destructor making it unnecessary to worry about forgetting to do it.
 wxFile is a wrapper around {\tt file descriptor.} - see also 
 \helpref{wxFFile}{wxffile} for a wrapper around {\tt FILE} structure.
 
+{\tt wxFileOffset} is used by the wxFile functions which require offsets as 
+parameter or return them. If the platform supports it, wxFileOffset if a typedef
+for a native 64 bit integer, else a 32 bit integer is used for wxFileOffset.
+
 \wxheading{Derived from}
 
 None.
@@ -70,7 +74,7 @@ Will fail if the file already exists, else create and open it atomically.  Usefu
 \end{twocollist}
 
 Other constants defined elsewhere but used by wxFile functions are wxInvalidOffset which represents an
-invalid value of type {\it off\_t} and is returned by functions returning {\it off\_t} on error and the seek
+invalid value of type {\it wxFileOffset} and is returned by functions returning {\it wxFileOffset} on error and the seek
 mode constants used with \helpref{Seek()}{wxfileseek}:
 
 \twocolwidtha{7cm}
@@ -82,7 +86,8 @@ mode constants used with \helpref{Seek()}{wxfileseek}:
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
-\membersection{wxFile::wxFile}\label{wxfileconstr}
+
+\membersection{wxFile::wxFile}\label{wxfilector}
 
 \func{}{wxFile}{\void}
 
@@ -107,7 +112,8 @@ Associates the file with the given file descriptor, which has already been opene
 
 \docparam{fd}{An existing file descriptor (see \helpref{Attach()}{wxfileattach} for the list of predefined descriptors)}
 
-\membersection{wxFile::\destruct{wxFile}}
+
+\membersection{wxFile::\destruct{wxFile}}\label{wxfiledtor}
 
 \func{}{\destruct{wxFile}}{\void}
 
@@ -115,6 +121,7 @@ Destructor will close the file.
 
 {\bf NB:} it is not virtual so you should not use wxFile polymorphically.
 
+
 \membersection{wxFile::Access}\label{wxfileaccess}
 
 \func{static bool}{Access}{\param{const char *}{ name}, \param{OpenMode}{ mode}}
@@ -122,6 +129,7 @@ Destructor will close the file.
 This function verifies if we may access the given file in specified mode. Only
 values of wxFile::read or wxFile::write really make sense here.
 
+
 \membersection{wxFile::Attach}\label{wxfileattach}
 
 \func{void}{Attach}{\param{int}{ fd}}
@@ -133,12 +141,14 @@ have symbolic names of {\bf wxFile::fd\_stdin}, {\bf wxFile::fd\_stdout} and {\b
 The descriptor should be already opened and it will be closed by wxFile
 object.
 
+
 \membersection{wxFile::Close}\label{wxfileclose}
 
 \func{void}{Close}{\void}
 
 Closes the file.
 
+
 \membersection{wxFile::Create}\label{wxfilecreate}
 
 \func{bool}{Create}{\param{const char*}{ filename}, \param{bool}{ overwrite = false}, \param{int }{access = wxS\_DEFAULT}}
@@ -146,6 +156,7 @@ Closes the file.
 Creates a file for writing. If the file already exists, setting {\bf overwrite} to true
 will ensure it is overwritten.
 
+
 \membersection{wxFile::Detach}\label{wxfiledetach}
 
 \func{void}{Detach}{\void}
@@ -153,12 +164,14 @@ will ensure it is overwritten.
 Get back a file descriptor from wxFile object - the caller is responsible for closing the file if this
 descriptor is opened. \helpref{IsOpened()}{wxfileisopened} will return false after call to Detach().
 
+
 \membersection{wxFile::fd}\label{wxfilefd}
 
 \constfunc{int}{fd}{\void}
 
 Returns the file descriptor associated with the file.
 
+
 \membersection{wxFile::Eof}\label{wxfileeof}
 
 \constfunc{bool}{Eof}{\void}
@@ -179,6 +192,7 @@ file into memory, you should write a loop which uses
 \helpref{Read}{wxfileread} repeatedly and tests its return condition instead
 of using Eof() as this will not work for special files under Unix.
 
+
 \membersection{wxFile::Exists}\label{wxfileexists}
 
 \func{static bool}{Exists}{\param{const char*}{ filename}}
@@ -186,6 +200,7 @@ of using Eof() as this will not work for special files under Unix.
 Returns true if the given name specifies an existing regular file (not a
 directory or a link)
 
+
 \membersection{wxFile::Flush}\label{wxfileflush}
 
 \func{bool}{Flush}{\void}
@@ -196,18 +211,39 @@ Note that wxFile::Flush is not implemented on some Windows compilers
 due to a missing fsync function, which reduces the usefulness of this function
 (it can still be called but it will do nothing on unsupported compilers).
 
+
+\membersection{wxFile::GetKind}\label{wxfilegetfilekind}
+
+\constfunc{wxFileKind}{GetKind}{\void}
+
+Returns the type of the file. Possible return values are:
+
+\begin{verbatim}
+enum wxFileKind
+{
+  wxFILE_KIND_UNKNOWN,
+  wxFILE_KIND_DISK,     // a file supporting seeking to arbitrary offsets
+  wxFILE_KIND_TERMINAL, // a tty
+  wxFILE_KIND_PIPE      // a pipe
+};
+
+\end{verbatim}
+
+
 \membersection{wxFile::IsOpened}\label{wxfileisopened}
 
 \constfunc{bool}{IsOpened}{\void}
 
 Returns true if the file has been opened.
 
+
 \membersection{wxFile::Length}\label{wxfilelength}
 
-\constfunc{off\_t}{Length}{\void}
+\constfunc{wxFileOffset}{Length}{\void}
 
 Returns the length of the file.
 
+
 \membersection{wxFile::Open}\label{wxfileopen}
 
 \func{bool}{Open}{\param{const char*}{ filename}, \param{wxFile::OpenMode}{ mode = wxFile::read}}
@@ -220,9 +256,10 @@ Opens the file, returning true if successful.
 
 \docparam{mode}{The mode in which to open the file. May be one of {\bf wxFile::read}, {\bf wxFile::write} and {\bf wxFile::read\_write}.}
 
+
 \membersection{wxFile::Read}\label{wxfileread}
 
-\func{off\_t}{Read}{\param{void*}{ buffer}, \param{off\_t}{ count}}
+\func{size\_t}{Read}{\param{void*}{ buffer}, \param{size\_t}{ count}}
 
 Reads the specified number of bytes into a buffer, returning the actual number read.
 
@@ -236,9 +273,10 @@ Reads the specified number of bytes into a buffer, returning the actual number r
 
 The number of bytes read, or the symbol {\bf wxInvalidOffset} (-1) if there was an error.
 
+
 \membersection{wxFile::Seek}\label{wxfileseek}
 
-\func{off\_t}{Seek}{\param{off\_t }{ofs}, \param{wxSeekMode }{mode = wxFromStart}}
+\func{wxFileOffset}{Seek}{\param{wxFileOffset }{ofs}, \param{wxSeekMode }{mode = wxFromStart}}
 
 Seeks to the specified position.
 
@@ -252,11 +290,14 @@ Seeks to the specified position.
 
 The actual offset position achieved, or wxInvalidOffset on failure.
 
+
 \membersection{wxFile::SeekEnd}\label{wxfileseekend}
 
-\func{off\_t}{SeekEnd}{\param{off\_t }{ofs = 0}}
+\func{wxFileOffset}{SeekEnd}{\param{wxFileOffset }{ofs = 0}}
 
-Moves the file pointer to the specified number of bytes before the end of the file.
+Moves the file pointer to the specified number of bytes relative to the end of
+the file. For example, \texttt{SeekEnd($-5$)} would position the pointer $5$
+bytes before the end.
 
 \wxheading{Parameters}
 
@@ -266,16 +307,18 @@ Moves the file pointer to the specified number of bytes before the end of the fi
 
 The actual offset position achieved, or wxInvalidOffset on failure.
 
+
 \membersection{wxFile::Tell}\label{wxfiletell}
 
-\constfunc{off\_t}{Tell}{\void}
+\constfunc{wxFileOffset}{Tell}{\void}
 
 Returns the current position or wxInvalidOffset if file is not opened or if another
 error occurred.
 
+
 \membersection{wxFile::Write}\label{wxfilewrite}
 
-\func{size\_t}{Write}{\param{const void*}{ buffer}, \param{off\_t}{ count}}
+\func{size\_t}{Write}{\param{const void*}{ buffer}, \param{size\_t}{ count}}
 
 Writes the specified number of bytes from a buffer.
 
@@ -289,12 +332,17 @@ Writes the specified number of bytes from a buffer.
 
 the number of bytes actually written
 
+
 \membersection{wxFile::Write}\label{wxfilewrites}
 
 \func{bool}{Write}{\param{const wxString\& }{s}, \param{wxMBConv\&}{ conv = wxConvUTF8}}
 
 Writes the contents of the string to the file, returns true on success.
 
-The second argument is only meaningful in Unicode build of wxWindows when
+The second argument is only meaningful in Unicode build of wxWidgets when
 {\it conv} is used to convert {\it s} to multibyte representation.
 
+Note that this method only works with {\tt NUL}-terminated strings, if you want
+to write data with embedded {\tt NUL}s to the file you should use the other 
+\helpref{Write() overload}{wxfilewrite}.
+
