basic_file_stdio.cc [plain text]
#include <bits/basic_file.h>
#include <fcntl.h>
namespace std
{
__basic_file<char>::__basic_file(__c_lock* )
: _M_cfile(NULL), _M_cfile_created(false) { }
__basic_file<char>::~__basic_file()
{ this->close(); }
void
__basic_file<char>::_M_open_mode(ios_base::openmode __mode, int& __p_mode,
int&, char* __c_mode)
{
bool __testb = __mode & ios_base::binary;
bool __testi = __mode & ios_base::in;
bool __testo = __mode & ios_base::out;
bool __testt = __mode & ios_base::trunc;
bool __testa = __mode & ios_base::app;
if (!__testi && __testo && !__testt && !__testa)
{
strcpy(__c_mode, "w");
__p_mode = (O_WRONLY | O_CREAT);
}
if (!__testi && __testo && !__testt && __testa)
{
strcpy(__c_mode, "a");
__p_mode |= O_WRONLY | O_CREAT | O_APPEND;
}
if (!__testi && __testo && __testt && !__testa)
{
strcpy(__c_mode, "w");
__p_mode |= O_WRONLY | O_CREAT | O_TRUNC;
}
if (__testi && !__testo && !__testt && !__testa)
{
strcpy(__c_mode, "r");
#if defined (O_NONBLOCK)
__p_mode |= O_RDONLY | O_NONBLOCK;
#else
__p_mode |= O_RDONLY;
#endif
}
if (__testi && __testo && !__testt && !__testa)
{
strcpy(__c_mode, "r+");
__p_mode |= O_RDWR | O_CREAT;
}
if (__testi && __testo && __testt && !__testa)
{
strcpy(__c_mode, "w+");
__p_mode |= O_RDWR | O_CREAT | O_TRUNC;
}
if (__testb)
strcat(__c_mode, "b");
}
__basic_file<char>*
__basic_file<char>::sys_open(__c_file* __file, ios_base::openmode)
{
__basic_file* __ret = NULL;
if (!this->is_open() && __file)
{
_M_cfile = __file;
_M_cfile_created = false;
__ret = this;
}
return __ret;
}
__basic_file<char>*
__basic_file<char>::sys_open(int __fd, ios_base::openmode __mode,
bool __del)
{
__basic_file* __ret = NULL;
int __p_mode = 0;
int __rw_mode = 0;
char __c_mode[4];
_M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
if (!this->is_open() && (_M_cfile = fdopen(__fd, __c_mode)))
{
_M_cfile_created = __del;
if (__fd == 0)
setvbuf(_M_cfile, reinterpret_cast<char*>(NULL), _IONBF, 0);
__ret = this;
}
return __ret;
}
int
__basic_file<char>::sys_getc()
{ return getc(_M_cfile); }
int
__basic_file<char>::sys_ungetc(int __c)
{ return ungetc(__c, _M_cfile); }
__basic_file<char>*
__basic_file<char>::open(const char* __name, ios_base::openmode __mode,
int )
{
__basic_file* __ret = NULL;
int __p_mode = 0;
int __rw_mode = 0;
char __c_mode[4];
_M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
if (!this->is_open())
{
if ((_M_cfile = fopen(__name, __c_mode)))
{
_M_cfile_created = true;
#if defined (F_SETFL) && defined (O_NONBLOCK)
if (__mode & ios_base::in)
fcntl(this->fd(), F_SETFL, O_NONBLOCK);
#endif
__ret = this;
}
}
return __ret;
}
bool
__basic_file<char>::is_open() const
{ return _M_cfile != 0; }
int
__basic_file<char>::fd()
{ return fileno(_M_cfile) ; }
__basic_file<char>*
__basic_file<char>::close()
{
__basic_file* __retval = static_cast<__basic_file*>(NULL);
if (this->is_open())
{
fflush(_M_cfile);
if ((_M_cfile_created && fclose(_M_cfile) == 0) || !_M_cfile_created)
{
_M_cfile = 0;
__retval = this;
}
}
return __retval;
}
streamsize
__basic_file<char>::xsgetn(char* __s, streamsize __n)
{ return fread(__s, 1, __n, _M_cfile); }
streamsize
__basic_file<char>::xsputn(const char* __s, streamsize __n)
{ return fwrite(__s, 1, __n, _M_cfile); }
streamoff
__basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode )
{
if (!fseek(_M_cfile, __off, __way))
return ftell(_M_cfile);
else
return -1L;
}
streamoff
__basic_file<char>::seekpos(streamoff __pos, ios_base::openmode )
{
if (!fseek(_M_cfile, __pos, ios_base::beg))
return ftell(_M_cfile);
else
return -1L;
}
int
__basic_file<char>::sync()
{ return fflush(_M_cfile); }
}