X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c801d85f158c4cba50b588807daabdcbd0ed3853..4def3b359546ee186b3db723db719f85b761f36a:/src/common/textfile.cpp diff --git a/src/common/textfile.cpp b/src/common/textfile.cpp index ca7235c4e9..8dff698c9b 100644 --- a/src/common/textfile.cpp +++ b/src/common/textfile.cpp @@ -2,7 +2,7 @@ // Name: textfile.cpp // Purpose: implementation of wxTextFile class // Author: Vadim Zeitlin -// Modified by: +// Modified by: // Created: 03.04.98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin @@ -14,44 +14,130 @@ // ============================================================================ #ifdef __GNUG__ -#pragma implementation "textfile.h" + #pragma implementation "textfile.h" #endif #include "wx/wxprec.h" #ifdef __BORLANDC__ - #pragma hdrstop + #pragma hdrstop #endif //__BORLANDC__ -#include -#include -#include -#include -#include +#if !wxUSE_FILE + #undef wxUSE_TEXTFILE + #define wxUSE_TEXTFILE 0 +#endif // wxUSE_FILE + +#ifndef WX_PRECOMP + #include "wx/string.h" + #include "wx/intl.h" + #include "wx/file.h" + #include "wx/log.h" +#endif + +#include "wx/textfile.h" // ============================================================================ // wxTextFile class implementation // ============================================================================ // ---------------------------------------------------------------------------- -// static variables +// static methods (always compiled in) // ---------------------------------------------------------------------------- - + // default type is the native one -const wxTextFile::Type wxTextFile::typeDefault = wxTextFile:: +const wxTextFileType wxTextFile::typeDefault = #if defined(__WINDOWS__) - Type_Dos; + wxTextFileType_Dos; #elif defined(__UNIX__) - Type_Unix; -#elif defined(__MAC__) - Type_Mac; - // if you feel brave, remove the next line - #error "wxTextFile: code for Mac files is untested." + wxTextFileType_Unix; +#elif defined(__WXMAC__) + wxTextFileType_Mac; +#elif defined(__WXPM__) + wxTextFileType_Os2; #else - Type_None; + wxTextFileType_None; #error "wxTextFile: unsupported platform." #endif +const wxChar *wxTextFile::GetEOL(wxTextFileType type) +{ + switch ( type ) { + default: + wxFAIL_MSG(wxT("bad file type in wxTextFile::GetEOL.")); + // fall through nevertheless - we must return something... + + case wxTextFileType_None: return wxT(""); + case wxTextFileType_Unix: return wxT("\n"); + case wxTextFileType_Dos: return wxT("\r\n"); + case wxTextFileType_Mac: return wxT("\r"); + } +} + +wxString wxTextFile::Translate(const wxString& text, wxTextFileType type) +{ + // don't do anything if there is nothing to do + if ( type == wxTextFileType_None ) + return text; + + // GRG: don't do anything either if it is empty + if ( text.IsEmpty() ) + return text; + + wxString eol = GetEOL(type), result; + + // optimization: we know that the length of the new string will be about + // the same as the length of the old one, so prealloc memory to aviod + // unnecessary relocations + result.Alloc(text.Len()); + + wxChar chLast = 0; + for ( const wxChar *pc = text.c_str(); *pc; pc++ ) + { + wxChar ch = *pc; + switch ( ch ) { + case _T('\n'): + // Dos/Unix line termination + result += eol; + chLast = 0; + break; + + case _T('\r'): + if ( chLast == _T('\r') ) { + // Mac empty line + result += eol; + } + else { + // just remember it: we don't know whether it is just "\r" + // or "\r\n" yet + chLast = _T('\r'); + } + break; + + default: + if ( chLast == _T('\r') ) { + // Mac line termination + result += eol; + + // reset chLast to avoid inserting another eol before the + // next character + chLast = 0; + } + + // add to the current line + result += ch; + } + } + + if ( chLast ) { + // trailing '\r' + result += eol; + } + + return result; +} + +#if wxUSE_TEXTFILE // ---------------------------------------------------------------------------- // ctors & dtor @@ -59,6 +145,8 @@ const wxTextFile::Type wxTextFile::typeDefault = wxTextFile:: wxTextFile::wxTextFile(const wxString& strFile) : m_strFile(strFile) { + m_nCurLine = 0; + m_isOpened = FALSE; } wxTextFile::~wxTextFile() @@ -70,9 +158,41 @@ wxTextFile::~wxTextFile() // file operations // ---------------------------------------------------------------------------- +bool wxTextFile::Exists() const +{ + return wxFile::Exists(m_strFile); +} + +bool wxTextFile::Create(const wxString& strFile) +{ + m_strFile = strFile; + + return Create(); +} + +bool wxTextFile::Create() +{ + // file name must be either given in ctor or in Create(const wxString&) + wxASSERT( !m_strFile.IsEmpty() ); + + // if the file already exists do nothing + if ( Exists() ) return FALSE; + + if ( m_file.Open(m_strFile, wxFile::write) ) + { + m_file.Close(); + return TRUE; + } + else + { + return FALSE; + } +} + bool wxTextFile::Open(const wxString& strFile) { m_strFile = strFile; + return Open(); } @@ -86,38 +206,38 @@ bool wxTextFile::Open() return FALSE; // read file into memory - bool bRet = Read(); + m_isOpened = Read(); m_file.Close(); - return bRet; + return m_isOpened; } // analyse some lines of the file trying to guess it's type. // if it fails, it assumes the native type for our platform. -wxTextFile::Type wxTextFile::GuessType() const +wxTextFileType wxTextFile::GuessType() const { - // file should be opened and we must be in it's beginning - wxASSERT( m_file.IsOpened() && m_file.Tell() == 0 ); + wxASSERT( IsOpened() ); // scan the file lines - uint nUnix = 0, // number of '\n's alone + size_t nUnix = 0, // number of '\n's alone nDos = 0, // number of '\r\n' nMac = 0; // number of '\r's // we take MAX_LINES_SCAN in the beginning, middle and the end of file #define MAX_LINES_SCAN (10) - uint nCount = m_aLines.Count() / 3, + size_t nCount = m_aLines.Count() / 3, nScan = nCount > 3*MAX_LINES_SCAN ? MAX_LINES_SCAN : nCount / 3; #define AnalyseLine(n) \ switch ( m_aTypes[n] ) { \ - case Type_Unix: nUnix++; break; \ - case Type_Dos: nDos++; break; \ - case Type_Mac: nMac++; break; \ + case wxTextFileType_Unix: nUnix++; break; \ + case wxTextFileType_Dos: nDos++; break; \ + case wxTextFileType_Mac: nMac++; break; \ + default: wxFAIL_MSG(_("unknown line terminator")); \ } - uint n; + size_t n; for ( n = 0; n < nScan; n++ ) // the beginning AnalyseLine(n); for ( n = (nCount - nScan)/2; n < (nCount + nScan)/2; n++ ) @@ -127,24 +247,28 @@ wxTextFile::Type wxTextFile::GuessType() const #undef AnalyseLine - // interpret the results (@@ far from being even 50% fool proof) + // interpret the results (FIXME far from being even 50% fool proof) if ( nDos + nUnix + nMac == 0 ) { // no newlines at all - wxLogWarning("'%s' is probably a binary file.", m_strFile.c_str()); + wxLogWarning(_("'%s' is probably a binary file."), m_strFile.c_str()); } else { #define GREATER_OF(t1, t2) n##t1 == n##t2 ? typeDefault \ - : n##t1 > n##t2 ? Type_##t1 \ - : Type_##t2 + : n##t1 > n##t2 \ + ? wxTextFileType_##t1 \ + : wxTextFileType_##t2 + // Watcom C++ doesn't seem to be able to handle the macro +#if !defined(__WATCOMC__) if ( nDos > nUnix ) return GREATER_OF(Dos, Mac); else if ( nDos < nUnix ) return GREATER_OF(Unix, Mac); else { // nDos == nUnix - return nMac > nDos ? Type_Mac : typeDefault; + return nMac > nDos ? wxTextFileType_Mac : typeDefault; } +#endif // __WATCOMC__ #undef GREATER_OF } @@ -159,75 +283,91 @@ bool wxTextFile::Read() wxString str; char ch, chLast = '\0'; - while ( !m_file.Eof() ) { - // @@ should really use a buffer for efficiency - if ( m_file.Read(&ch, sizeof(ch)) == ofsInvalid ) { - // read error - m_file.Close(); + char buf[1024]; + int n, nRead; + do { + nRead = m_file.Read(buf, WXSIZEOF(buf)); + if ( nRead == wxInvalidOffset ) { + // read error (error message already given in wxFile::Read) return FALSE; } - #ifdef __MAC__ - #pragma message("wxTextFile::Read() hasn't been tested with Mac files.") - #endif - - switch ( ch ) { - case '\n': - // Dos/Unix line termination - m_aLines.Add(str); - m_aTypes.Add(chLast == '\r' ? Type_Dos : Type_Unix); - str.Empty(); - chLast = '\n'; - break; - - case '\r': - if ( chLast == '\r' ) { - // Mac empty line - m_aLines.Add(""); - m_aTypes.Add(Type_Mac); - } - else - chLast = '\r'; - break; - - default: - if ( chLast == '\r' ) { - // Mac line termination + for ( n = 0; n < nRead; n++ ) { + ch = buf[n]; + switch ( ch ) { + case '\n': + // Dos/Unix line termination m_aLines.Add(str); - m_aTypes.Add(Type_Mac); - str = ch; - } - else { - // add to the current line - str += ch; - } + m_aTypes.Add(chLast == '\r' ? wxTextFileType_Dos + : wxTextFileType_Unix); + str.Empty(); + chLast = '\n'; + break; + + case '\r': + if ( chLast == '\r' ) { + // Mac empty line + m_aLines.Add(wxEmptyString); + m_aTypes.Add(wxTextFileType_Mac); + } + else + chLast = '\r'; + break; + + default: + if ( chLast == '\r' ) { + // Mac line termination + m_aLines.Add(str); + m_aTypes.Add(wxTextFileType_Mac); + chLast = ch; + str = ch; + } + else { + // add to the current line + str += ch; + } + } } - } + } while ( nRead == WXSIZEOF(buf) ); // anything in the last line? if ( !str.IsEmpty() ) { - m_aTypes.Add(Type_None); // no line terminator + m_aTypes.Add(wxTextFileType_None); // no line terminator m_aLines.Add(str); } return TRUE; } -bool wxTextFile::Write(Type typeNew) +bool wxTextFile::Close() +{ + m_aTypes.Clear(); + m_aLines.Clear(); + m_nCurLine = 0; + m_isOpened = FALSE; + + return TRUE; +} + +bool wxTextFile::Write(wxTextFileType typeNew) { wxTempFile fileTmp(m_strFile); if ( !fileTmp.IsOpened() ) { - wxLogError("can't write file '%s' to disk.", m_strFile.c_str()); + wxLogError(_("can't write file '%s' to disk."), m_strFile.c_str()); return FALSE; } - uint nCount = m_aLines.Count(); - for ( uint n = 0; n < nCount; n++ ) { - fileTmp.Write(m_aLines[n] + - GetEOL(typeNew == Type_None ? m_aTypes[n] : typeNew)); + size_t nCount = m_aLines.Count(); + for ( size_t n = 0; n < nCount; n++ ) { + fileTmp.Write(m_aLines[n] + + GetEOL(typeNew == wxTextFileType_None ? m_aTypes[n] + : typeNew)); } // replace the old file with this one return fileTmp.Commit(); -} \ No newline at end of file +} + +#endif // wxUSE_TEXTFILE +