newlib/libc/stdio/vasiprintf.c

   1 /*
   2  * Copyright (c) 1990, 2007 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * and/or other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17 /* This code was based on vsiprintf.c */
  18 /* doc in vfprintf.c */
  19
  20 #if defined(LIBC_SCCS) && !defined(lint)
  21 static char sccsid[] = "%W% (Berkeley) %G%";
  22 #endif /* LIBC_SCCS and not lint */
  23
  24 #include <_ansi.h>
  25 #include <stdio.h>
  26 #include <limits.h>
  27 #include <stdarg.h>
  28
  29 #include "local.h"
  30
  31 #ifndef _REENT_ONLY
  32
  33 int
  34 vasiprintf (char **strp,
  35        const char *fmt,
  36        va_list ap)
  37 {
  38   return _vasiprintf_r (_REENT, strp, fmt, ap);
  39 }
  40
  41 #endif /* !_REENT_ONLY */
  42
  43 int
  44 _vasiprintf_r (struct _reent *ptr,
  45        char **strp,
  46        const char *fmt,
  47        va_list ap)
  48 {
  49   int ret;
  50   FILE f;
  51
  52   f._flags = __SWR | __SSTR | __SMBF ;
  53   f._flags2 = 0;
  54   f._bf._base = f._p = NULL;
  55   f._bf._size = f._w = 0;
  56   f._file = -1;  /* No file. */
  57   ret = _svfiprintf_r (ptr, &f, fmt, ap);
  58   if (ret >= 0)
  59     {
  60       *f._p = 0;
  61       *strp = (char *) f._bf._base;
  62     }
  63   return ret;
  64 }