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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [stdio/] [vasniprintf.c] - Blame information for rev 158

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Line No. Rev Author Line
1 148 jeremybenn
/* Copyright (C) 2007, 2008 Eric Blake
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 * Permission to use, copy, modify, and distribute this software
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 * is freely granted, provided that this notice is preserved.
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 */
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/* This code was derived from asprintf.c */
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/* doc in viprintf.c */
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#include <_ansi.h>
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#include <reent.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <errno.h>
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#include "local.h"
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char *
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_DEFUN(_vasniprintf_r, (ptr, buf, lenp, fmt, ap),
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       struct _reent *ptr _AND
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       char *buf _AND
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       size_t *lenp _AND
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       const char *fmt _AND
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       va_list ap)
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{
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  int ret;
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  FILE f;
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  size_t len = *lenp;
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  if (buf && len)
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    {
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      /* mark an existing buffer, but allow allocation of larger string */
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      f._flags = __SWR | __SSTR | __SOPT;
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    }
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  else
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    {
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      /* mark a zero-length reallocatable buffer */
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      f._flags = __SWR | __SSTR | __SMBF;
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      len = 0;
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      buf = NULL;
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    }
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  f._bf._base = f._p = (unsigned char *) buf;
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  /* For now, inherit the 32-bit signed limit of FILE._bf._size.
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     FIXME - it would be nice to rewrite sys/reent.h to support size_t
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     for _size.  */
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  if (len > INT_MAX)
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    {
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      ptr->_errno = EOVERFLOW;
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      return NULL;
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    }
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  f._bf._size = f._w = len;
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  f._file = -1;  /* No file. */
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  ret = _svfiprintf_r (ptr, &f, fmt, ap);
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  if (ret < 0)
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    return NULL;
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  *lenp = ret;
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  *f._p = '\0';
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  return (char *) f._bf._base;
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}
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#ifndef _REENT_ONLY
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char *
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_DEFUN(vasniprintf, (buf, lenp, fmt, ap),
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       char *buf _AND
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       size_t *lenp _AND
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       const char *fmt _AND
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       va_list ap)
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{
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  return _vasniprintf_r (_REENT, buf, lenp, fmt, ap);
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}
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#endif /* ! _REENT_ONLY */

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