new file mode 100644
--- /dev/null
+++ b/lib/vasnprintf.c
@@ -0,0 +1,767 @@
+/* vsprintf with automatic memory allocation.
+   Copyright (C) 1999, 2002-2003 Free Software Foundation, Inc.
+
+   This program 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, or (at your option)
+   any later version.
+
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+   USA.  */
+
+/* Tell glibc's <stdio.h> to provide a prototype for snprintf().
+   This must come before <config.h> because <config.h> may include
+   <features.h>, and once <features.h> has been included, it's too late.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE    1
+#endif
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include <alloca.h>
+
+/* Specification.  */
+#include "vasnprintf.h"
+
+#include <stdio.h>	/* snprintf(), sprintf() */
+#include <stdlib.h>	/* abort(), malloc(), realloc(), free() */
+#include <string.h>	/* memcpy(), strlen() */
+#include <errno.h>	/* errno */
+#include <limits.h>	/* CHAR_BIT */
+#include <float.h>	/* DBL_MAX_EXP, LDBL_MAX_EXP */
+#include "printf-parse.h"
+
+/* For those losing systems which don't have 'alloca' we have to add
+   some additional code emulating it.  */ 
+#ifdef HAVE_ALLOCA 
+# define freea(p) /* nothing */
+#else
+# define alloca(n) malloc (n) 
+# define freea(p) free (p) 
+#endif
+
+char *
+vasnprintf (char *resultbuf, size_t *lengthp, const char *format, va_list args)
+{
+  char_directives d;
+  arguments a;
+
+  if (printf_parse (format, &d, &a) < 0)
+    {
+      errno = EINVAL;
+      return NULL;
+    }
+
+#define CLEANUP() \
+  free (d.dir);								\
+  if (a.arg)								\
+    free (a.arg);
+
+  if (printf_fetchargs (args, &a) < 0)
+    {
+      CLEANUP ();
+      errno = EINVAL;
+      return NULL;
+    }
+
+  {
+    char *buf =
+      (char *) alloca (7 + d.max_width_length + d.max_precision_length + 6);
+    const char *cp;
+    unsigned int i;
+    char_directive *dp;
+    /* Output string accumulator.  */
+    char *result;
+    size_t allocated;
+    size_t length;
+
+    if (resultbuf != NULL)
+      {
+	result = resultbuf;
+	allocated = *lengthp;
+      }
+    else
+      {
+	result = NULL;
+	allocated = 0;
+      }
+    length = 0;
+    /* Invariants:
+       result is either == resultbuf or == NULL or malloc-allocated.
+       If length > 0, then result != NULL.  */
+
+#define ENSURE_ALLOCATION(needed) \
+    if ((needed) > allocated)						\
+      {									\
+	char *memory;							\
+									\
+	allocated = (allocated > 0 ? 2 * allocated : 12);		\
+	if ((needed) > allocated)					\
+	  allocated = (needed);						\
+	if (result == resultbuf || result == NULL)			\
+	  memory = (char *) malloc (allocated);				\
+	else								\
+	  memory = (char *) realloc (result, allocated);		\
+									\
+	if (memory == NULL)						\
+	  {								\
+	    if (!(result == resultbuf || result == NULL))		\
+	      free (result);						\
+	    freea (buf);						\
+	    CLEANUP ();							\
+	    errno = ENOMEM;						\
+	    return NULL;						\
+	  }								\
+	if (result == resultbuf && length > 0)				\
+	  memcpy (memory, result, length);				\
+	result = memory;						\
+      }
+
+    for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
+      {
+	if (cp != dp->dir_start)
+	  {
+	    size_t n = dp->dir_start - cp;
+
+	    ENSURE_ALLOCATION (length + n);
+	    memcpy (result + length, cp, n);
+	    length += n;
+	  }
+	if (i == d.count)
+	  break;
+
+	/* Execute a single directive.  */
+	if (dp->conversion == '%')
+	  {
+	    if (!(dp->arg_index < 0))
+	      abort ();
+	    ENSURE_ALLOCATION (length + 1);
+	    result[length] = '%';
+	    length += 1;
+	  }
+	else
+	  {
+	    if (!(dp->arg_index >= 0))
+	      abort ();
+
+	    if (dp->conversion == 'n')
+	      {
+		switch (a.arg[dp->arg_index].type)
+		  {
+		  case TYPE_COUNT_SCHAR_POINTER:
+		    *a.arg[dp->arg_index].a.a_count_schar_pointer = length;
+		    break;
+		  case TYPE_COUNT_SHORT_POINTER:
+		    *a.arg[dp->arg_index].a.a_count_short_pointer = length;
+		    break;
+		  case TYPE_COUNT_INT_POINTER:
+		    *a.arg[dp->arg_index].a.a_count_int_pointer = length;
+		    break;
+		  case TYPE_COUNT_LONGINT_POINTER:
+		    *a.arg[dp->arg_index].a.a_count_longint_pointer = length;
+		    break;
+#ifdef HAVE_LONG_LONG
+		  case TYPE_COUNT_LONGLONGINT_POINTER:
+		    *a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
+		    break;
+#endif
+		  default:
+		    abort ();
+		  }
+	      }
+	    else
+	      {
+		arg_type type = a.arg[dp->arg_index].type;
+		char *p;
+		unsigned int prefix_count;
+		int prefixes[2];
+#if !HAVE_SNPRINTF
+		unsigned int tmp_length;
+		char tmpbuf[700];
+		char *tmp;
+
+		/* Allocate a temporary buffer of sufficient size for calling
+		   sprintf.  */
+		{
+		  unsigned int width;
+		  unsigned int precision;
+
+		  width = 0;
+		  if (dp->width_start != dp->width_end)
+		    {
+		      if (dp->width_arg_index >= 0)
+			{
+			  int arg;
+
+			  if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+			    abort ();
+			  arg = a.arg[dp->width_arg_index].a.a_int;
+			  width = (arg < 0 ? -arg : arg);
+			}
+		      else
+			{
+			  const char *digitp = dp->width_start;
+
+			  do
+			    width = width * 10 + (*digitp++ - '0');
+			  while (digitp != dp->width_end);
+			}
+		    }
+
+		  precision = 6;
+		  if (dp->precision_start != dp->precision_end)
+		    {
+		      if (dp->precision_arg_index >= 0)
+			{
+			  int arg;
+
+			  if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+			    abort ();
+			  arg = a.arg[dp->precision_arg_index].a.a_int;
+			  precision = (arg < 0 ? 0 : arg);
+			}
+		      else
+			{
+			  const char *digitp = dp->precision_start + 1;
+
+			  precision = 0;
+			  do
+			    precision = precision * 10 + (*digitp++ - '0');
+			  while (digitp != dp->precision_end);
+			}
+		    }
+
+		  switch (dp->conversion)
+		    {
+
+		    case 'd': case 'i': case 'u':
+# ifdef HAVE_LONG_LONG
+		      if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
+					  * 0.30103 /* binary -> decimal */
+					  * 2 /* estimate for FLAG_GROUP */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 1; /* account for leading sign */
+		      else
+# endif
+		      if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned long) * CHAR_BIT
+					  * 0.30103 /* binary -> decimal */
+					  * 2 /* estimate for FLAG_GROUP */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 1; /* account for leading sign */
+		      else
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned int) * CHAR_BIT
+					  * 0.30103 /* binary -> decimal */
+					  * 2 /* estimate for FLAG_GROUP */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 1; /* account for leading sign */
+		      break;
+
+		    case 'o':
+# ifdef HAVE_LONG_LONG
+		      if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
+					  * 0.333334 /* binary -> octal */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 1; /* account for leading sign */
+		      else
+# endif
+		      if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned long) * CHAR_BIT
+					  * 0.333334 /* binary -> octal */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 1; /* account for leading sign */
+		      else
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned int) * CHAR_BIT
+					  * 0.333334 /* binary -> octal */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 1; /* account for leading sign */
+		      break;
+
+		    case 'x': case 'X':
+# ifdef HAVE_LONG_LONG
+		      if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
+					  * 0.25 /* binary -> hexadecimal */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 2; /* account for leading sign or alternate form */
+		      else
+# endif
+		      if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned long) * CHAR_BIT
+					  * 0.25 /* binary -> hexadecimal */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 2; /* account for leading sign or alternate form */
+		      else
+			tmp_length =
+			  (unsigned int) (sizeof (unsigned int) * CHAR_BIT
+					  * 0.25 /* binary -> hexadecimal */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + 2; /* account for leading sign or alternate form */
+		      break;
+
+		    case 'f': case 'F':
+# ifdef HAVE_LONG_DOUBLE
+		      if (type == TYPE_LONGDOUBLE)
+			tmp_length =
+			  (unsigned int) (LDBL_MAX_EXP
+					  * 0.30103 /* binary -> decimal */
+					  * 2 /* estimate for FLAG_GROUP */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + precision
+			  + 10; /* sign, decimal point etc. */
+		      else
+# endif
+			tmp_length =
+			  (unsigned int) (DBL_MAX_EXP
+					  * 0.30103 /* binary -> decimal */
+					  * 2 /* estimate for FLAG_GROUP */
+					 )
+			  + 1 /* turn floor into ceil */
+			  + precision
+			  + 10; /* sign, decimal point etc. */
+		      break;
+
+		    case 'e': case 'E': case 'g': case 'G':
+		    case 'a': case 'A':
+		      tmp_length =
+			precision
+			+ 12; /* sign, decimal point, exponent etc. */
+		      break;
+
+		    case 'c':
+# ifdef HAVE_WINT_T
+		      if (type == TYPE_WIDE_CHAR)
+			tmp_length = MB_CUR_MAX;
+		      else
+# endif
+			tmp_length = 1;
+		      break;
+
+		    case 's':
+# ifdef HAVE_WCHAR_T
+		      if (type == TYPE_WIDE_STRING)
+			tmp_length =
+			  wcslen (a.arg[dp->arg_index].a.a_wide_string)
+			  * MB_CUR_MAX;
+		      else
+# endif
+			tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
+		      break;
+
+		    case 'p':
+		      tmp_length =
+			(unsigned int) (sizeof (void *) * CHAR_BIT
+					* 0.25 /* binary -> hexadecimal */
+				       )
+			  + 1 /* turn floor into ceil */
+			  + 2; /* account for leading 0x */
+		      break;
+
+		    default:
+		      abort ();
+		    }
+
+		  if (tmp_length < width)
+		    tmp_length = width;
+
+		  tmp_length++; /* account for trailing NUL */
+		}
+
+		if (tmp_length <= sizeof (tmpbuf))
+		  tmp = tmpbuf;
+		else
+		  {
+		    tmp = (char *) malloc (tmp_length);
+		    if (tmp == NULL)
+		      {
+			/* Out of memory.  */
+			if (!(result == resultbuf || result == NULL))
+			  free (result);
+			freea (buf);
+			CLEANUP ();
+			errno = ENOMEM;
+			return NULL;
+		      }
+		  }
+#endif
+
+		/* Construct the format string for calling snprintf or
+		   sprintf.  */
+		p = buf;
+		*p++ = '%';
+		if (dp->flags & FLAG_GROUP)
+		  *p++ = '\'';
+		if (dp->flags & FLAG_LEFT)
+		  *p++ = '-';
+		if (dp->flags & FLAG_SHOWSIGN)
+		  *p++ = '+';
+		if (dp->flags & FLAG_SPACE)
+		  *p++ = ' ';
+		if (dp->flags & FLAG_ALT)
+		  *p++ = '#';
+		if (dp->flags & FLAG_ZERO)
+		  *p++ = '0';
+		if (dp->width_start != dp->width_end)
+		  {
+		    size_t n = dp->width_end - dp->width_start;
+		    memcpy (p, dp->width_start, n);
+		    p += n;
+		  }
+		if (dp->precision_start != dp->precision_end)
+		  {
+		    size_t n = dp->precision_end - dp->precision_start;
+		    memcpy (p, dp->precision_start, n);
+		    p += n;
+		  }
+
+		switch (type)
+		  {
+#ifdef HAVE_LONG_LONG
+		  case TYPE_LONGLONGINT:
+		  case TYPE_ULONGLONGINT:
+		    *p++ = 'l';
+		    /*FALLTHROUGH*/
+#endif
+		  case TYPE_LONGINT:
+		  case TYPE_ULONGINT:
+#ifdef HAVE_WINT_T
+		  case TYPE_WIDE_CHAR:
+#endif
+#ifdef HAVE_WCHAR_T
+		  case TYPE_WIDE_STRING:
+#endif
+		    *p++ = 'l';
+		    break;
+#ifdef HAVE_LONG_DOUBLE
+		  case TYPE_LONGDOUBLE:
+		    *p++ = 'L';
+		    break;
+#endif
+		  default:
+		    break;
+		  }
+		*p = dp->conversion;
+#if HAVE_SNPRINTF
+		p[1] = '%';
+		p[2] = 'n';
+		p[3] = '\0';
+#else
+		p[1] = '\0';
+#endif
+
+		/* Construct the arguments for calling snprintf or sprintf.  */
+		prefix_count = 0;
+		if (dp->width_arg_index >= 0)
+		  {
+		    if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
+		      abort ();
+		    prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
+		  }
+		if (dp->precision_arg_index >= 0)
+		  {
+		    if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
+		      abort ();
+		    prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
+		  }
+
+#if HAVE_SNPRINTF
+		/* Prepare checking whether snprintf returns the count
+		   via %n.  */
+		ENSURE_ALLOCATION (length + 1);
+		result[length] = '\0';
+#endif
+
+		for (;;)
+		  {
+		    size_t maxlen;
+		    int count;
+		    int retcount;
+
+		    maxlen = allocated - length;
+		    count = -1;
+		    retcount = 0;
+
+#if HAVE_SNPRINTF
+#define SNPRINTF_BUF(arg) \
+		    switch (prefix_count)				    \
+		      {							    \
+		      case 0:						    \
+			retcount = snprintf (result + length, maxlen, buf,  \
+					     arg, &count);		    \
+			break;						    \
+		      case 1:						    \
+			retcount = snprintf (result + length, maxlen, buf,  \
+					     prefixes[0], arg, &count);	    \
+			break;						    \
+		      case 2:						    \
+			retcount = snprintf (result + length, maxlen, buf,  \
+					     prefixes[0], prefixes[1], arg, \
+					     &count);			    \
+			break;						    \
+		      default:						    \
+			abort ();					    \
+		      }
+#else
+#define SNPRINTF_BUF(arg) \
+		    switch (prefix_count)				    \
+		      {							    \
+		      case 0:						    \
+			count = sprintf (tmp, buf, arg);		    \
+			break;						    \
+		      case 1:						    \
+			count = sprintf (tmp, buf, prefixes[0], arg);	    \
+			break;						    \
+		      case 2:						    \
+			count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
+					 arg);				    \
+			break;						    \
+		      default:						    \
+			abort ();					    \
+		      }
+#endif
+
+		    switch (type)
+		      {
+		      case TYPE_SCHAR:
+			{
+			  int arg = a.arg[dp->arg_index].a.a_schar;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_UCHAR:
+			{
+			  unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_SHORT:
+			{
+			  int arg = a.arg[dp->arg_index].a.a_short;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_USHORT:
+			{
+			  unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_INT:
+			{
+			  int arg = a.arg[dp->arg_index].a.a_int;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_UINT:
+			{
+			  unsigned int arg = a.arg[dp->arg_index].a.a_uint;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_LONGINT:
+			{
+			  long int arg = a.arg[dp->arg_index].a.a_longint;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_ULONGINT:
+			{
+			  unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#ifdef HAVE_LONG_LONG
+		      case TYPE_LONGLONGINT:
+			{
+			  long long int arg = a.arg[dp->arg_index].a.a_longlongint;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      case TYPE_ULONGLONGINT:
+			{
+			  unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#endif
+		      case TYPE_DOUBLE:
+			{
+			  double arg = a.arg[dp->arg_index].a.a_double;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#ifdef HAVE_LONG_DOUBLE
+		      case TYPE_LONGDOUBLE:
+			{
+			  long double arg = a.arg[dp->arg_index].a.a_longdouble;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#endif
+		      case TYPE_CHAR:
+			{
+			  int arg = a.arg[dp->arg_index].a.a_char;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#ifdef HAVE_WINT_T
+		      case TYPE_WIDE_CHAR:
+			{
+			  wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#endif
+		      case TYPE_STRING:
+			{
+			  const char *arg = a.arg[dp->arg_index].a.a_string;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#ifdef HAVE_WCHAR_T
+		      case TYPE_WIDE_STRING:
+			{
+			  const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+#endif
+		      case TYPE_POINTER:
+			{
+			  void *arg = a.arg[dp->arg_index].a.a_pointer;
+			  SNPRINTF_BUF (arg);
+			}
+			break;
+		      default:
+			abort ();
+		      }
+
+#if HAVE_SNPRINTF
+		    /* Portability: Not all implementations of snprintf()
+		       are ISO C 99 compliant.  Determine the number of
+		       bytes that snprintf() has produced or would have
+		       produced.  */
+		    if (count >= 0)
+		      {
+			/* Verify that snprintf() has NUL-terminated its
+			   result.  */
+			if (count < maxlen && result[length + count] != '\0')
+			  abort ();
+			/* Portability hack.  */
+			if (retcount > count)
+			  count = retcount;
+		      }
+		    else
+		      {
+			/* snprintf() doesn't understand the '%n'
+			   directive.  */
+			if (p[1] != '\0')
+			  {
+			    /* Don't use the '%n' directive; instead, look
+			       at the snprintf() return value.  */
+			    p[1] = '\0';
+			    continue;
+			  }
+			count = retcount;
+		      }
+#endif
+
+		    /* Attempt to handle failure.  */
+		    if (count < 0)
+		      {
+			if (!(result == resultbuf || result == NULL))
+			  free (result);
+			freea (buf);
+			CLEANUP ();
+			errno = EINVAL;
+			return NULL;
+		      }
+
+#if !HAVE_SNPRINTF
+		    if (count >= tmp_length)
+		      /* tmp_length was incorrectly calculated - fix the
+			 code above!  */
+		      abort ();
+#endif
+
+		    /* Make room for the result.  */
+		    if (count >= maxlen)
+		      {
+			/* Need at least count bytes.  But allocate
+			   proportionally, to avoid looping eternally if
+			   snprintf() reports a too small count.  */
+			size_t n = length + count;
+
+			if (n < 2 * allocated)
+			  n = 2 * allocated;
+
+			ENSURE_ALLOCATION (n);
+#if HAVE_SNPRINTF
+			continue;
+#endif
+		      }
+
+#if HAVE_SNPRINTF
+		    /* The snprintf() result did fit.  */
+#else
+		    /* Append the sprintf() result.  */
+		    memcpy (result + length, tmp, count);
+		    if (tmp != tmpbuf)
+		      free (tmp);
+#endif
+
+		    length += count;
+		    break;
+		  }
+	      }
+	  }
+      }
+
+    /* Add the final NUL.  */
+    ENSURE_ALLOCATION (length + 1);
+    result[length] = '\0';
+
+    if (result != resultbuf && length + 1 < allocated)
+      {
+	/* Shrink the allocated memory if possible.  */
+	char *memory;
+
+	memory = (char *) realloc (result, length + 1);
+	if (memory != NULL)
+	  result = memory;
+      }
+
+    freea (buf);
+    CLEANUP ();
+    *lengthp = length;
+    return result;
+  }
+}