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Diffstat (limited to 'contrib/libio/ioextend.cc')
| -rw-r--r-- | contrib/libio/ioextend.cc | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/contrib/libio/ioextend.cc b/contrib/libio/ioextend.cc deleted file mode 100644 index a31ff36e6e58..000000000000 --- a/contrib/libio/ioextend.cc +++ /dev/null @@ -1,132 +0,0 @@ -/* -Copyright (C) 1993 Free Software Foundation - -This file is part of the GNU IO Library. This library is free -software; you can redistribute it and/or modify it under the -terms of the GNU General Public License as published by the -Free Software Foundation; either version 2, or (at your option) -any later version. - -This library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this library; see the file COPYING. If not, write to the Free -Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - -As a special exception, if you link this library with files -compiled with a GNU compiler to produce an executable, this does not cause -the resulting executable to be covered by the GNU General Public License. -This exception does not however invalidate any other reasons why -the executable file might be covered by the GNU General Public License. */ - -#include <iostream.h> - -static int __xalloc = 0; - -int ios::xalloc() -{ - return __xalloc++; -} - -static ios::fmtflags __used_fmt_flags -= ios::skipws | ios::left | ios::right | ios::internal -| ios::dec | ios::oct | ios::hex | ios::showbase | ios::showpoint -| ios::uppercase | ios::showpos | ios::scientific | ios::fixed -#ifndef _IO_NEW_STREAMS -| ios::dont_close -#endif -| ios::unitbuf | ios::stdio; - -ios::fmtflags ios::bitalloc() -{ - fmtflags bit_to_try = (fmtflags)1; - for (; bit_to_try; bit_to_try <<= 1) - { - if ((__used_fmt_flags & bit_to_try) == 0) - { - __used_fmt_flags |= bit_to_try; - return bit_to_try; - } - } - return 0; -} - -// NOTE: This implementation of ios::iword and ios::pword assumes -// that these methods are seldom used, so we want to minimize -// the space and time overhead when NOT using these methods. -// -// ANSI specifies two conceptually-infinite arrays, one whose -// elements are longs, and one whose elements are (void*)s. -// We implement this as a single array, each of whose element is -// a (struct ptr_and_long), which has space for both a long and a void*. -// We also specify that (the i field of) the 0'th element of the array -// contains the allocated length of the array (not counting that -// initial element). - -struct ptr_and_long { - void *p; - long i; -}; - -static struct ptr_and_long& -get_array_element(ios& io, int index) -{ - if (index < 0) - io._throw_failure(); - register struct ptr_and_long *array = (ptr_and_long*)io._arrays; - int old_length = array == NULL ? 0 : array[0].i; - if (index >= old_length) - { - register int i; - int new_length = index + 10; - register struct ptr_and_long *new_array - = new ptr_and_long[1 + new_length]; - if (array != NULL) - { - for (i = 1; i <= old_length; i++) - new_array[i] = array[i]; - delete [] array; - } - for (i = old_length + 1; i <= new_length; i++) - { - new_array[i].i = 0; - new_array[i].p = NULL; - } - new_array[0].i = new_length; - new_array[0].p = NULL; - io._arrays = (void*)new_array; - array = new_array; - } - return array[index+1]; -} - -long& ios::iword(int index) -{ - return get_array_element(*this, index).i; -} - -void*& ios::pword(int index) -{ - return get_array_element(*this, index).p; -} - -long ios::iword(int index) const -{ - if (index < 0) - _throw_failure(); - register struct ptr_and_long *pl_array = (ptr_and_long*)_arrays; - int len = pl_array == NULL ? 0 : pl_array[0].i; - return index >= len ? 0 : pl_array[index+1].i; -} - -void* ios::pword(int index) const -{ - if (index < 0) - _throw_failure(); - register struct ptr_and_long *pl_array = (ptr_and_long*)_arrays; - int len = pl_array == NULL ? 0 : pl_array[0].i; - return index >= len ? 0 : pl_array[index+1].p; -} |