reactos/irc/ArchBlackmann/File.cpp
Casper Hornstrup 568b27baeb Move Arch to irc module.
svn path=/trunk/; revision=13063
2005-01-15 19:15:45 +00:00

266 lines
5.3 KiB
C++

// File.cpp
// (C) 2002-2004 Royce Mitchell III
// Dually licensed under BSD & LGPL
#ifdef _MSC_VER
#pragma warning ( disable : 4786 )
#endif//_MSC_VER
#include <stdio.h>
#include <stdarg.h>
#include "File.h"
#ifndef nelem
#define nelem(x) ( sizeof(x) / sizeof(x[0]) )
#endif//nelem
using File::filesize_t;
using File::fileoff_t;
fileoff_t File::seek ( fileoff_t offset )
{
#ifdef WIN32
if ( _f->_flag & _IOWRT ) // is there pending output?
fflush ( _f );
// reset "buffered input" variables
_f->_cnt = 0;
_f->_ptr = _f->_base;
// make sure we're going forward
if ( _f->_flag & _IORW )
_f->_flag &= ~(_IOREAD|_IOWRT);
return _lseeki64 ( _fileno(_f), offset, SEEK_SET );
#else//UNIX
return lseek64 ( fileno(_f), offset, SEEK_SET );
#endif
}
std::string File::getline ( bool strip_crlf /*= false*/ )
{
std::string s = "";
char buf[256];
for ( ;; )
{
*buf = 0;
fgets ( buf, nelem(buf)-1, _f );
if ( !*buf )
break;
s += buf;
if ( strchr ( "\r\n", buf[strlen(buf)-1] ) )
break;
}
if ( strip_crlf && s.size() )
{
char* p = strpbrk ( &s[0], "\r\n" );
if ( p )
{
*p = '\0';
s.resize ( p-&s[0] );
}
}
return s;
}
std::wstring File::wgetline ( bool strip_crlf /*= false*/ )
{
std::wstring s = L"";
wchar_t buf[256];
for ( ;; )
{
*buf = 0;
fgetws ( buf, nelem(buf)-1, _f );
if ( !*buf )
break;
s += buf;
if ( wcschr ( L"\r\n", buf[wcslen(buf)-1] ) )
break;
}
if ( strip_crlf && s.size() )
{
wchar_t* p = wcspbrk ( &s[0], L"\r\n" );
if ( p )
{
*p = L'\0';
s.resize ( (p-&s[0])/sizeof(wchar_t) );
}
}
return s;
}
// this function searches for the next end-of-line and puts all data it
// finds until then in the 'line' parameter.
//
// call continuously until the function returns false ( no more data )
bool File::next_line ( std::string& line, bool strip_crlf )
{
line = getline(strip_crlf);
// indicate that we're done *if*:
// 1) there's no more data, *and*
// 2) we're at the end of the file
return line.size()>0 || !eof();
}
bool File::next_line ( std::wstring& line, bool strip_crlf )
{
line = wgetline ( strip_crlf );
return line.size()>0 || !eof();
}
/*
example usage:
bool mycallback ( const std::string& line, int line_number, long lparam )
{
std::cout << line << std::endl;
return true; // continue enumeration
}
File f ( "file.txt", "rb" ); // open file for binary read-only ( i.e. "rb" )
f.enum_lines ( mycallback, 0, true );
*/
/*bool File::enum_lines ( bool (*callback)(const std::string& line, int line_number, long lparam), long lparam, bool strip_crlf )
{
int line_number = 0;
for ( ;; )
{
std::string s = getline(strip_crlf);
line_number++;
if ( !s.size() )
{
if ( eof() )
return true;
else
continue;
}
if ( !(*callback) ( s, line_number, lparam ) )
return false;
}
}*/
filesize_t File::length() const
{
#ifdef WIN32
return _filelengthi64 ( _fileno(_f) );
#elif defined(UNIX)
struct stat64 file_stat;
verify(fstat64(fileno(_f), &file_stat) == 0);
return file_stat.st_size;
#endif
}
void File::close()
{
if ( _f )
{
fclose(_f);
_f = 0;
}
}
void File::printf ( const char* fmt, ... )
{
va_list arg;
int done;
va_start(arg, fmt);
assert(_f);
done = vfprintf ( _f, fmt, arg );
va_end(arg);
}
/*static*/ bool File::LoadIntoString ( std::string& s, const std::string& filename )
{
File in ( filename, "rb" );
if ( !in.isopened() )
return false;
filesize_t flen = in.length();
size_t len = size_t(flen);
if ( len != flen )
return false; // file too big...
s.resize ( len + 1 );
if ( !in.read ( &s[0], len ) )
return false;
s[len] = '\0';
s.resize ( len );
return true;
}
/*static*/ bool File::LoadIntoString ( std::string& s, const std::wstring& filename )
{
File in ( filename, L"rb" );
if ( !in.isopened() )
return false;
filesize_t flen = in.length();
size_t len = size_t(flen);
if ( len != flen )
return false; // file too big...
s.resize ( len + 1 );
if ( !in.read ( &s[0], len ) )
return false;
s[len] = '\0';
s.resize ( len );
return true;
}
/*static*/ bool File::SaveFromString ( const std::string& filename, const std::string& s, bool binary )
{
File out ( filename, binary ? "wb" : "w" );
if ( !out.isopened() )
return false;
out.write ( s.c_str(), s.size() );
return true;
}
/*static*/ bool File::SaveFromString ( const std::wstring& filename, const std::string& s, bool binary )
{
File out ( filename, binary ? L"wb" : L"w" );
if ( !out.isopened() )
return false;
out.write ( s.c_str(), s.size() );
return true;
}
/*static*/ bool File::SaveFromBuffer ( const std::string& filename, const char* buf, size_t buflen, bool binary )
{
File out ( filename, binary ? "wb" : "w" );
if ( !out.isopened() )
return false;
out.write ( buf, buflen );
return true;
}
/*static*/ bool File::SaveFromBuffer ( const std::wstring& filename, const char* buf, size_t buflen, bool binary )
{
File out ( filename, binary ? L"wb" : L"w" );
if ( !out.isopened() )
return false;
out.write ( buf, buflen );
return true;
}
/*static*/ std::string File::TempFileName ( const std::string& prefix )
{
#ifdef WIN32
std::string s ( _tempnam ( ".", prefix.c_str() ) );
return s;
#else
// FIXME
return string("");
#endif
}
/*static*/ std::wstring File::TempFileName ( const std::wstring& prefix )
{
#ifdef WIN32
std::wstring s ( _wtempnam ( L".", prefix.c_str() ) );
return s;
#else
// FIXME
return std::wstring(L"");
#endif
}