mirror of
https://github.com/reactos/reactos.git
synced 2024-10-30 03:27:31 +00:00
2012315e5a
svn path=/trunk/; revision=34303
130 lines
2.5 KiB
C++
130 lines
2.5 KiB
C++
// File.cpp
|
|
// This file is (C) 2002-2003 Royce Mitchell III and released under the BSD license
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning ( disable : 4786 )
|
|
#endif//_MSC_VER
|
|
|
|
#include "File.h"
|
|
|
|
bool File::open ( const char* filename, const char* mode )
|
|
{
|
|
close();
|
|
_f = fopen ( filename, mode );
|
|
return _f != 0;
|
|
}
|
|
|
|
std::string File::getline ( bool strip_crlf /*= false*/ )
|
|
{
|
|
std::string s = "";
|
|
char buf[256];
|
|
for ( ;; )
|
|
{
|
|
*buf = 0;
|
|
fgets ( buf, sizeof(buf)-1, _f );
|
|
if ( !*buf )
|
|
break;
|
|
s += buf;
|
|
if ( strchr ( "\r\n", buf[strlen(buf)-1] ) )
|
|
break;
|
|
}
|
|
if ( strip_crlf )
|
|
{
|
|
char* p = strpbrk ( &s[0], "\r\n" );
|
|
if ( p )
|
|
{
|
|
*p = '\0';
|
|
s.resize ( p-&s[0] );
|
|
}
|
|
}
|
|
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();
|
|
}
|
|
|
|
/*
|
|
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;
|
|
}
|
|
}
|
|
|
|
size_t File::length()
|
|
{
|
|
#ifdef WIN32
|
|
return _filelength ( _fileno(_f) );
|
|
#elif defined(UNIX)
|
|
struct stat file_stat;
|
|
verify(fstat(fileno(_f), &file_stat) == 0);
|
|
return file_stat.st_size;
|
|
#endif
|
|
}
|
|
|
|
void File::close()
|
|
{
|
|
if ( _f )
|
|
{
|
|
fclose(_f);
|
|
_f = 0;
|
|
}
|
|
}
|
|
|
|
/*static*/ bool File::LoadIntoString ( std::string& s, const char* filename )
|
|
{
|
|
File in ( filename, "rb" );
|
|
if ( !in.isopened() )
|
|
return false;
|
|
size_t len = in.length();
|
|
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 char* 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;
|
|
}
|