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124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/* Like vsprintf but provides a pointer to malloc'd storage, which must
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be freed by the caller.
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Copyright (C) 1994-2023 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If not, write
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to the Free Software Foundation, Inc., 51 Franklin Street - Fifth
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Floor, Boston, MA 02110-1301, USA. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <ansidecl.h>
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#include <stdarg.h>
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#if !defined (va_copy) && defined (__va_copy)
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# define va_copy(d,s) __va_copy((d),(s))
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#endif
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#include <stdio.h>
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#else
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extern void *malloc ();
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#endif
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#include "libiberty.h"
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#include "vprintf-support.h"
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#ifdef TEST
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int global_total_width;
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#endif
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/*
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@deftypefn Extension int vasprintf (char **@var{resptr}, @
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const char *@var{format}, va_list @var{args})
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Like @code{vsprintf}, but instead of passing a pointer to a buffer,
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you pass a pointer to a pointer. This function will compute the size
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of the buffer needed, allocate memory with @code{malloc}, and store a
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pointer to the allocated memory in @code{*@var{resptr}}. The value
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returned is the same as @code{vsprintf} would return. If memory could
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not be allocated, minus one is returned and @code{NULL} is stored in
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@code{*@var{resptr}}.
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@end deftypefn
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*/
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static int int_vasprintf (char **, const char *, va_list);
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static int
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int_vasprintf (char **result, const char *format, va_list args)
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{
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int total_width = libiberty_vprintf_buffer_size (format, args);
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#ifdef TEST
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global_total_width = total_width;
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#endif
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*result = (char *) malloc (total_width);
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if (*result != NULL)
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return vsprintf (*result, format, args);
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else
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return -1;
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}
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int
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vasprintf (char **result, const char *format,
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#if defined (_BSD_VA_LIST_) && defined (__FreeBSD__)
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_BSD_VA_LIST_ args)
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#else
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va_list args)
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#endif
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{
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return int_vasprintf (result, format, args);
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}
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#ifdef TEST
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static void ATTRIBUTE_PRINTF_1
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checkit (const char *format, ...)
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{
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char *result;
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va_list args;
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va_start (args, format);
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vasprintf (&result, format, args);
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va_end (args);
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if (strlen (result) < (size_t) global_total_width)
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printf ("PASS: ");
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else
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printf ("FAIL: ");
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printf ("%d %s\n", global_total_width, result);
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free (result);
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}
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extern int main (void);
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int
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main (void)
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{
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checkit ("%d", 0x12345678);
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checkit ("%200d", 5);
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checkit ("%.300d", 6);
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checkit ("%100.150d", 7);
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checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
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777777777777777777333333333333366666666666622222222222777777777777733333");
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checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx");
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return 0;
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}
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#endif /* TEST */
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