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/* Print output of stream to given obstack.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifdef __STDC__
#include <stdlib.h>
#endif
#include "libioP.h"
#include <string.h>
#include <errno.h>
#include <obstack.h>
#include <stdarg.h>
struct _IO_obstack_file
{
struct _IO_FILE file;
const void *vtable;
struct obstack *obstack;
};
static int
_IO_obstack_overflow (_IO_FILE *fp, int c)
{
struct obstack *obstack = ((struct _IO_obstack_file *) fp)->obstack;
/* Make room for another character. This might as well allocate a
new chunk a memory and moves the old contents over. */
if (c != EOF)
obstack_1grow (obstack, c);
/* Setup the buffer pointers again. */
fp->_IO_write_base = obstack_base (obstack);
fp->_IO_write_ptr = obstack_next_free (obstack);
fp->_IO_write_end = fp->_IO_write_base + obstack_room (obstack);
/* Now allocate the rest of the current chunk. */
obstack_blank_fast (obstack, fp->_IO_write_end - fp->_IO_write_ptr);
return c;
}
static _IO_size_t
_IO_obstack_xsputn (_IO_FILE *fp, const void *data, _IO_size_t n)
{
struct obstack *obstack = ((struct _IO_obstack_file *) fp)->obstack;
if (fp->_IO_write_ptr + n > fp->_IO_write_end)
{
/* We need some more memory. First shrink the buffer to the
space we really currently need. */
obstack_blank (obstack, fp->_IO_write_ptr - fp->_IO_write_end);
/* Now grow for N bytes. */
obstack_blank (obstack, n);
/* Setup the buffer pointers again. */
fp->_IO_write_base = obstack_base (obstack);
fp->_IO_write_ptr = obstack_next_free (obstack);
fp->_IO_write_end = (fp->_IO_write_base + obstack_room (obstack));
/* Now allocate the rest of the current chunk. */
obstack_blank_fast (obstack, fp->_IO_write_end - fp->_IO_write_ptr);
}
else
{
memcpy (fp->_IO_write_ptr, data, n);
fp->_IO_write_ptr += n;
}
return n;
}
/* the jump table. */
static struct _IO_jump_t _IO_obstack_jumps =
{
JUMP_INIT_DUMMY,
JUMP_INIT(finish, NULL),
JUMP_INIT(overflow, _IO_obstack_overflow),
JUMP_INIT(underflow, NULL),
JUMP_INIT(uflow, NULL),
JUMP_INIT(pbackfail, NULL),
JUMP_INIT(xsputn, _IO_obstack_xsputn),
JUMP_INIT(xsgetn, NULL),
JUMP_INIT(seekoff, NULL),
JUMP_INIT(seekpos, NULL),
JUMP_INIT(setbuf, NULL),
JUMP_INIT(sync, NULL),
JUMP_INIT(doallocate, NULL),
JUMP_INIT(read, NULL),
JUMP_INIT(write, NULL),
JUMP_INIT(seek, NULL),
JUMP_INIT(close, NULL),
JUMP_INIT(stat, NULL)
};
int
_IO_obstack_vprintf (struct obstack *obstack, const char *format, va_list args)
{
struct obstack_FILE
{
struct _IO_obstack_file ofile;
#ifdef _IO_MTSAFE_IO
_IO_lock_t lock;
#endif
} new_f;
int result;
#ifdef _IO_MTSAFE_IO
new_f.ofile.file._lock = &new_f.lock;
#endif
_IO_init ((_IO_FILE *) &new_f.ofile, 0);
_IO_JUMPS (&new_f.ofile.file) = &_IO_obstack_jumps;
_IO_str_init_static (&new_f.ofile.file, obstack_base (obstack),
(obstack_object_size (obstack) +
obstack_room (obstack)), obstack_next_free (obstack));
/* Now allocate the rest of the current chunk. */
obstack_blank_fast (obstack,
(new_f.ofile.file._IO_write_end
- new_f.ofile.file._IO_write_ptr));
new_f.ofile.obstack = obstack;
result = _IO_vfprintf ((_IO_FILE *) &new_f, format, args);
/* Shrink the buffer to the space we really currently need. */
obstack_blank (obstack, (new_f.ofile.file._IO_write_ptr
- new_f.ofile.file._IO_write_end));
return result;
}
#ifdef weak_alias
weak_alias (_IO_obstack_vprintf, obstack_vprintf)
#endif
int
_IO_obstack_printf (struct obstack *obstack, const char *format, ...)
{
int result;
va_list ap;
va_start (ap, format);
result = _IO_obstack_vprintf (obstack, format, ap);
va_end (ap);
return result;
}
#ifdef weak_alias
weak_alias (_IO_obstack_printf, obstack_printf)
#endif
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