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glibc  2.9
Classes | Functions
obprintf.c File Reference
#include "libioP.h"
#include "strfile.h"
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <obstack.h>
#include <stdarg.h>
#include <stdio_ext.h>

Go to the source code of this file.

Classes

struct  _IO_obstack_file

Functions

static int _IO_obstack_overflow (_IO_FILE *fp, int c)
static _IO_size_t _IO_obstack_xsputn (_IO_FILE *fp, const void *data, _IO_size_t n)
int _IO_obstack_vprintf (struct obstack *obstack, const char *format, va_list args)
 ldbl_weak_alias (_IO_obstack_vprintf, obstack_vprintf)

Class Documentation

struct _IO_obstack_file

Definition at line 34 of file obprintf_chk.c.

Collaboration diagram for _IO_obstack_file:
Class Members
struct obstack * obstack

Function Documentation

static int _IO_obstack_overflow ( _IO_FILE fp,
int  c 
) [static]

Definition at line 44 of file obprintf.c.

{
  struct obstack *obstack = ((struct _IO_obstack_file *) fp)->obstack;
  int size;

  /* Make room for another character.  This might as well allocate a
     new chunk a memory and moves the old contents over.  */
  assert (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);
  size = obstack_room (obstack);
  fp->_IO_write_end = fp->_IO_write_ptr + size;
  /* Now allocate the rest of the current chunk.  */
  obstack_blank_fast (obstack, size);

  return c;
}
int _IO_obstack_vprintf ( struct obstack obstack,
const char *  format,
va_list  args 
)

Definition at line 124 of file obprintf.c.

{
  struct obstack_FILE
    {
      struct _IO_obstack_file ofile;
  } new_f;
  int result;
  int size;
  int room;

#ifdef _IO_MTSAFE_IO
  new_f.ofile.file.file._lock = NULL;
#endif

  _IO_no_init (&new_f.ofile.file.file, _IO_USER_LOCK, -1, NULL, NULL);
  _IO_JUMPS (&new_f.ofile.file) = &_IO_obstack_jumps;
  room = obstack_room (obstack);
  size = obstack_object_size (obstack) + room;
  if (size == 0)
    {
      /* We have to handle the allocation a bit different since the
        `_IO_str_init_static' function would handle a size of zero
        different from what we expect.  */

      /* Get more memory.  */
      obstack_make_room (obstack, 64);

      /* Recompute how much room we have.  */
      room = obstack_room (obstack);
      size = room;

      assert (size != 0);
    }

  _IO_str_init_static_internal ((struct _IO_strfile_ *) &new_f.ofile,
                            obstack_base (obstack),
                            size, obstack_next_free (obstack));
  /* Now allocate the rest of the current chunk.  */
  assert (size == (new_f.ofile.file.file._IO_write_end
                 - new_f.ofile.file.file._IO_write_base));
  assert (new_f.ofile.file.file._IO_write_ptr
         == (new_f.ofile.file.file._IO_write_base
             + obstack_object_size (obstack)));
  obstack_blank_fast (obstack, room);

  new_f.ofile.obstack = obstack;

  result = INTUSE(_IO_vfprintf) (&new_f.ofile.file.file, format, args);

  /* Shrink the buffer to the space we really currently need.  */
  obstack_blank_fast (obstack, (new_f.ofile.file.file._IO_write_ptr
                            - new_f.ofile.file.file._IO_write_end));

  return result;
}

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static _IO_size_t _IO_obstack_xsputn ( _IO_FILE fp,
const void *  data,
_IO_size_t  n 
) [static]

Definition at line 67 of file obprintf.c.

{
  struct obstack *obstack = ((struct _IO_obstack_file *) fp)->obstack;

  if (fp->_IO_write_ptr + n > fp->_IO_write_end)
    {
      int size;

      /* We need some more memory.  First shrink the buffer to the
        space we really currently need.  */
      obstack_blank_fast (obstack, fp->_IO_write_ptr - fp->_IO_write_end);

      /* Now grow for N bytes, and put the data there.  */
      obstack_grow (obstack, data, n);

      /* Setup the buffer pointers again.  */
      fp->_IO_write_base = obstack_base (obstack);
      fp->_IO_write_ptr = obstack_next_free (obstack);
      size = obstack_room (obstack);
      fp->_IO_write_end = fp->_IO_write_ptr + size;
      /* Now allocate the rest of the current chunk.  */
      obstack_blank_fast (obstack, size);
    }
  else
    fp->_IO_write_ptr = __mempcpy (fp->_IO_write_ptr, data, n);

  return n;
}

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Definition at line 179 of file obprintf.c.

{
  int result;
  va_list ap;
  va_start (ap, format);
  result = _IO_obstack_vprintf (obstack, format, ap);
  va_end (ap);
  return result;
}

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