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  1. /* Like vsprintf but provides a pointer to malloc'd storage, which must
  2.    be freed by the caller.
  3.    Copyright (C) 1994, 2003, 2011, 2013 Free Software Foundation, Inc.
  4.  
  5. This file is part of the libiberty library.
  6. Libiberty is free software; you can redistribute it and/or
  7. modify it under the terms of the GNU Library General Public
  8. License as published by the Free Software Foundation; either
  9. version 2 of the License, or (at your option) any later version.
  10.  
  11. Libiberty is distributed in the hope that it will be useful,
  12. but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14. Library General Public License for more details.
  15.  
  16. You should have received a copy of the GNU Library General Public
  17. License along with libiberty; see the file COPYING.LIB.  If not, write
  18. to the Free Software Foundation, Inc., 51 Franklin Street - Fifth
  19. Floor, Boston, MA 02110-1301, USA.  */
  20.  
  21. #ifdef HAVE_CONFIG_H
  22. #include "config.h"
  23. #endif
  24. #include <ansidecl.h>
  25. #include <stdarg.h>
  26. #if !defined (va_copy) && defined (__va_copy)
  27. # define va_copy(d,s)  __va_copy((d),(s))
  28. #endif
  29. #include <stdio.h>
  30. #ifdef HAVE_STRING_H
  31. #include <string.h>
  32. #endif
  33. #ifdef HAVE_STDLIB_H
  34. #include <stdlib.h>
  35. #else
  36. extern PTR malloc ();
  37. #endif
  38. #include "libiberty.h"
  39. #include "vprintf-support.h"
  40.  
  41. #ifdef TEST
  42. int global_total_width;
  43. #endif
  44.  
  45. /*
  46.  
  47. @deftypefn Extension int vasprintf (char **@var{resptr}, @
  48.   const char *@var{format}, va_list @var{args})
  49.  
  50. Like @code{vsprintf}, but instead of passing a pointer to a buffer,
  51. you pass a pointer to a pointer.  This function will compute the size
  52. of the buffer needed, allocate memory with @code{malloc}, and store a
  53. pointer to the allocated memory in @code{*@var{resptr}}.  The value
  54. returned is the same as @code{vsprintf} would return.  If memory could
  55. not be allocated, minus one is returned and @code{NULL} is stored in
  56. @code{*@var{resptr}}.
  57.  
  58. @end deftypefn
  59.  
  60. */
  61.  
  62. static int int_vasprintf (char **, const char *, va_list);
  63.  
  64. static int
  65. int_vasprintf (char **result, const char *format, va_list args)
  66. {
  67.   int total_width = libiberty_vprintf_buffer_size (format, args);
  68. #ifdef TEST
  69.   global_total_width = total_width;
  70. #endif
  71.   *result = (char *) malloc (total_width);
  72.   if (*result != NULL)
  73.     return vsprintf (*result, format, args);
  74.   else
  75.     return -1;
  76. }
  77.  
  78. int
  79. vasprintf (char **result, const char *format,
  80. #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__)
  81.            _BSD_VA_LIST_ args)
  82. #else
  83.            va_list args)
  84. #endif
  85. {
  86.   return int_vasprintf (result, format, args);
  87. }
  88.  
  89. #ifdef TEST
  90. static void ATTRIBUTE_PRINTF_1
  91. checkit (const char *format, ...)
  92. {
  93.   char *result;
  94.   va_list args;
  95.   va_start (args, format);
  96.   vasprintf (&result, format, args);
  97.   va_end (args);
  98.  
  99.   if (strlen (result) < (size_t) global_total_width)
  100.     printf ("PASS: ");
  101.   else
  102.     printf ("FAIL: ");
  103.   printf ("%d %s\n", global_total_width, result);
  104.  
  105.   free (result);
  106. }
  107.  
  108. extern int main (void);
  109.  
  110. int
  111. main (void)
  112. {
  113.   checkit ("%d", 0x12345678);
  114.   checkit ("%200d", 5);
  115.   checkit ("%.300d", 6);
  116.   checkit ("%100.150d", 7);
  117.   checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
  118. 777777777777777777333333333333366666666666622222222222777777777777733333");
  119.   checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx");
  120.  
  121.   return 0;
  122. }
  123. #endif /* TEST */
  124.