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421
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1 /* Formatted output to strings.
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2 Copyright (C) 1999, 2002, 2006-2010 Free Software Foundation, Inc.
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3, or (at your option)
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7 any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License along
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15 with this program; if not, write to the Free Software Foundation,
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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17
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18 #include <config.h>
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19
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20 /* Specification. */
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21 #ifdef IN_LIBASPRINTF
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22 # include "vasprintf.h"
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23 #else
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24 # include <stdio.h>
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25 #endif
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26
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27 #include <errno.h>
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28 #include <limits.h>
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29 #include <stdlib.h>
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30
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31 #include "vasnprintf.h"
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32
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33 int
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34 vasprintf (char **resultp, const char *format, va_list args)
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35 {
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36 size_t length;
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37 char *result = vasnprintf (NULL, &length, format, args);
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38 if (result == NULL)
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39 return -1;
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40
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41 if (length > INT_MAX)
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42 {
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43 free (result);
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44 errno = EOVERFLOW;
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45 return -1;
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46 }
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47
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48 *resultp = result;
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49 /* Return the number of resulting bytes, excluding the trailing NUL. */
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50 return length;
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51 }
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