newlib/libc/stdio/vasprintf.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 vsprintf.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 vasprintf (char **strp,
  35        const char *fmt,
  36        va_list ap)
  37 {
  38   return _vasprintf_r (_REENT, strp, fmt, ap);
  39 }
  40
  41 #ifdef _NANO_FORMATTED_IO
  42 int
  43 vasiprintf (char **, const char *, __VALIST)
  44        _ATTRIBUTE ((__alias__("vasprintf")));
  45 #endif
  46
  47 #endif /* !_REENT_ONLY */
  48
  49 int
  50 _vasprintf_r (struct _reent *ptr,
  51        char **strp,
  52        const char *fmt,
  53        va_list ap)
  54 {
  55   int ret;
  56   FILE f;
  57
  58   f._flags = __SWR | __SSTR | __SMBF ;
  59   f._flags2 = 0;
  60   f._bf._base = f._p = NULL;
  61   f._bf._size = f._w = 0;
  62   f._file = -1;  /* No file. */
  63   ret = _svfprintf_r (ptr, &f, fmt, ap);
  64   if (ret >= 0)
  65     {
  66       *f._p = 0;
  67       *strp = (char *) f._bf._base;
  68     }
  69   return ret;
  70 }
  71
  72 #ifdef _NANO_FORMATTED_IO
  73 int
  74 _vasiprintf_r (struct _reent *, char **, const char *, __VALIST)
  75        _ATTRIBUTE ((__alias__("_vasprintf_r")));
  76 #endif