gl/tests/test-vasnprintf.c

   1 /* Test of vasnprintf() and asnprintf() functions.
   2    Copyright (C) 2007-2012 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include "vasnprintf.h"
  22
  23 #include <stdarg.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "macros.h"
  28
  29 static void
  30 test_function (char * (*my_asnprintf) (char *, size_t *, const char *, ...))
  31 {
  32   char buf[8];
  33   int size;
  34
  35   for (size = 0; size <= 8; size++)
  36     {
  37       size_t length = size;
  38       char *result = my_asnprintf (NULL, &length, "%d", 12345);
  39       ASSERT (result != NULL);
  40       ASSERT (strcmp (result, "12345") == 0);
  41       ASSERT (length == 5);
  42       free (result);
  43     }
  44
  45   for (size = 0; size <= 8; size++)
  46     {
  47       size_t length;
  48       char *result;
  49
  50       memcpy (buf, "DEADBEEF", 8);
  51       length = size;
  52       result = my_asnprintf (buf, &length, "%d", 12345);
  53       ASSERT (result != NULL);
  54       ASSERT (strcmp (result, "12345") == 0);
  55       ASSERT (length == 5);
  56       if (size < 6)
  57         ASSERT (result != buf);
  58       ASSERT (memcmp (buf + size, "DEADBEEF" + size, 8 - size) == 0);
  59       if (result != buf)
  60         free (result);
  61     }
  62 }
  63
  64 static char *
  65 my_asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
  66 {
  67   va_list args;
  68   char *ret;
  69
  70   va_start (args, format);
  71   ret = vasnprintf (resultbuf, lengthp, format, args);
  72   va_end (args);
  73   return ret;
  74 }
  75
  76 static void
  77 test_vasnprintf ()
  78 {
  79   test_function (my_asnprintf);
  80 }
  81
  82 static void
  83 test_asnprintf ()
  84 {
  85   test_function (asnprintf);
  86 }
  87
  88 int
  89 main (int argc, char *argv[])
  90 {
  91   test_vasnprintf ();
  92   test_asnprintf ();
  93   return 0;
  94 }