X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c801d85f158c4cba50b588807daabdcbd0ed3853..401e3b6e5f50f15571b86297b5d1e3f55c473f6f:/include/wx/file.h diff --git a/include/wx/file.h b/include/wx/file.h index ece4086f95..9ce1ee7043 100644 --- a/include/wx/file.h +++ b/include/wx/file.h @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: file.cpp +// Name: file.h // Purpose: wxFile - encapsulates low-level "file descriptor" // wxTempFile - safely replace the old file // Author: Vadim Zeitlin @@ -7,35 +7,43 @@ // Created: 29/01/98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifndef __FILEH__ -#define __FILEH__ +#ifndef _WX_FILEH__ +#define _WX_FILEH__ -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma interface "file.h" #endif -// ---------------------------------------------------------------------------- -// simple types -// ---------------------------------------------------------------------------- - -#include - -// define off_t -#include +#include "wx/string.h" +#include "wx/filefn.h" +#include "wx/strconv.h" -#ifdef _MSC_VER - #define off_t _off_t -#endif +#if wxUSE_FILE // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- -// error return value for Seek() functions -const off_t ofsInvalid = (off_t)-1; +// we redefine these constants here because S_IREAD &c are _not_ standard +// however, we do assume that the values correspond to the Unix umask bits +#define wxS_IRUSR 00400 +#define wxS_IWUSR 00200 +#define wxS_IXUSR 00100 + +#define wxS_IRGRP 00040 +#define wxS_IWGRP 00020 +#define wxS_IXGRP 00010 + +#define wxS_IROTH 00004 +#define wxS_IWOTH 00002 +#define wxS_IXOTH 00001 + +// default mode for the new files: corresponds to umask 022 +#define wxS_DEFAULT (wxS_IRUSR | wxS_IWUSR | wxS_IRGRP | wxS_IWGRP |\ + wxS_IROTH | wxS_IWOTH) // ---------------------------------------------------------------------------- // class wxFile: raw file IO @@ -43,53 +51,68 @@ const off_t ofsInvalid = (off_t)-1; // NB: for space efficiency this class has no virtual functions, including // dtor which is _not_ virtual, so it shouldn't be used as a base class. // ---------------------------------------------------------------------------- -class WXDLLEXPORT wxFile + +class WXDLLIMPEXP_BASE wxFile { public: // more file constants // ------------------- - // opening mode - enum OpenMode { read, write, read_write }; + enum OpenMode { read, write, read_write, write_append, write_excl }; // standard values for file descriptor enum { fd_invalid = -1, fd_stdin, fd_stdout, fd_stderr }; - // seek type - enum SeekMode { FromStart, FromEnd, FromCurrent }; // static functions // ---------------- - static bool Exists(const char *sz); // also checks it's a regular file + // check whether a regular file by this name exists + static bool Exists(const wxChar *name); + // check whether we can access the given file in given mode + // (only read and write make sense here) + static bool Access(const wxChar *name, OpenMode mode); // ctors // ----- // def ctor - wxFile() { m_fd = fd_invalid; } + wxFile() { m_fd = fd_invalid; m_error = false; } // open specified file (may fail, use IsOpened()) - wxFile(const char *szFileName, OpenMode mode = read); + wxFile(const wxChar *szFileName, OpenMode mode = read); // attach to (already opened) file - wxFile(int fd) { m_fd = fd; } + wxFile(int fd) { m_fd = fd; m_error = false; } // open/close - bool Create(const char *szFileName, bool bOverwrite = FALSE); - bool Open(const char *szFileName, OpenMode mode = read); - void Attach(int fd) { Close(); m_fd = fd; } - inline void Close(); // Close is a NOP if not opened + // create a new file (with the default value of bOverwrite, it will fail if + // the file already exists, otherwise it will overwrite it and succeed) + bool Create(const wxChar *szFileName, bool bOverwrite = false, + int access = wxS_DEFAULT); + bool Open(const wxChar *szFileName, OpenMode mode = read, + int access = wxS_DEFAULT); + bool Close(); // Close is a NOP if not opened + + // assign an existing file descriptor and get it back from wxFile object + void Attach(int fd) { Close(); m_fd = fd; m_error = false; } + void Detach() { m_fd = fd_invalid; } + int fd() const { return m_fd; } // read/write (unbuffered) // returns number of bytes read or ofsInvalid on error off_t Read(void *pBuf, off_t nCount); + // returns the number of bytes written + size_t Write(const void *pBuf, size_t nCount); // returns true on success - bool Write(const void *pBuf, uint nCount); - // returns true on success - bool Write(const wxString& str) { return Write(str.c_str(), str.Len()); } + bool Write(const wxString& s, wxMBConv& conv = wxConvUTF8) + { + const wxWX2MBbuf buf = s.mb_str(conv); + size_t size = strlen(buf); + return Write((const char *) buf, size) == size; + } // flush data not yet written bool Flush(); // file pointer operations (return ofsInvalid on failure) // move ptr ofs bytes related to start/current off_t/end of file - off_t Seek(off_t ofs, SeekMode mode = FromStart); + off_t Seek(off_t ofs, wxSeekMode mode = wxFromStart); // move ptr to ofs bytes before the end - off_t SeekEnd(off_t ofs = 0) { return Seek(ofs, FromEnd); } + off_t SeekEnd(off_t ofs = 0) { return Seek(ofs, wxFromEnd); } // get current off_t off_t Tell() const; // get current file length @@ -100,9 +123,11 @@ public: bool IsOpened() const { return m_fd != fd_invalid; } // is end of file reached? bool Eof() const; - + // has an error occured? + bool Error() const { return m_error; } + // dtor closes the file if opened - ~wxFile(); + ~wxFile() { Close(); } private: // copy ctor and assignment operator are private because @@ -112,6 +137,7 @@ private: wxFile& operator=(const wxFile&); int m_fd; // file descriptor or INVALID_FD if not opened + bool m_error; // error memory }; // ---------------------------------------------------------------------------- @@ -121,7 +147,8 @@ private: // file (and close this one) or call Discard() to cancel the modification. If // you call neither of them, dtor will call Discard(). // ---------------------------------------------------------------------------- -class wxTempFile + +class WXDLLIMPEXP_BASE wxTempFile { public: // ctors @@ -137,8 +164,9 @@ public: bool IsOpened() const { return m_file.IsOpened(); } // I/O (both functions return true on success, false on failure) - bool Write(const void *p, uint n) { return m_file.Write(p, n); } - bool Write(const wxString& str) { return m_file.Write(str); } + bool Write(const void *p, size_t n) { return m_file.Write(p, n) != 0; } + bool Write(const wxString& str, wxMBConv& conv = wxConvUTF8) + { return m_file.Write(str, conv); } // different ways to close the file // validate changes and delete the old file of name m_strName @@ -150,10 +178,15 @@ public: ~wxTempFile(); private: + // no copy ctor/assignment operator + wxTempFile(const wxTempFile&); + wxTempFile& operator=(const wxTempFile&); + wxString m_strName, // name of the file to replace in Commit() m_strTemp; // temporary file name wxFile m_file; // the temporary file }; -#endif - // __FILEH__ +#endif // wxUSE_FILE + +#endif // _WX_FILEH__