root/maint/gnulib/tests/test-getdelim.c

/* */

DEFINITIONS

1. main

   1 /* Test of getdelim() function.
   2    Copyright (C) 2007-2021 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, or (at your option)
   7    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 <https://www.gnu.org/licenses/>.  */
  16 
  17 /* Written by Eric Blake <ebb9@byu.net>, 2007.  */
  18 
  19 #include <config.h>
  20 
  21 #include <stdio.h>
  22 
  23 #include "signature.h"
  24 SIGNATURE_CHECK (getdelim, ssize_t, (char **, size_t *, int, FILE *));
  25 
  26 #include <stdlib.h>
  27 #include <string.h>
  28 
  29 #include "macros.h"
  30 
  31 int
  32 main (void)
     /*  */
  33 {
  34   FILE *f;
  35   char *line;
  36   size_t len;
  37   ssize_t result;
  38 
  39   /* Create test file.  */
  40   f = fopen ("test-getdelim.txt", "wb");
  41   if (!f || fwrite ("anAnbcnd\0f", 1, 10, f) != 10 || fclose (f) != 0)
  42     {
  43       fputs ("Failed to create sample file.\n", stderr);
  44       remove ("test-getdelim.txt");
  45       return 1;
  46     }
  47   f = fopen ("test-getdelim.txt", "rb");
  48   if (!f)
  49     {
  50       fputs ("Failed to reopen sample file.\n", stderr);
  51       remove ("test-getdelim.txt");
  52       return 1;
  53     }
  54 
  55   /* Test initial allocation, which must include trailing NUL.  */
  56   line = NULL;
  57   len = 0;
  58   result = getdelim (&line, &len, 'n', f);
  59   ASSERT (result == 2);
  60   ASSERT (strcmp (line, "an") == 0);
  61   ASSERT (2 < len);
  62   free (line);
  63 
  64   /* Test initial allocation again, with line = NULL and len != 0.  */
  65   line = NULL;
  66   len = (size_t)(~0) / 4;
  67   result = getdelim (&line, &len, 'n', f);
  68   ASSERT (result == 2);
  69   ASSERT (strcmp (line, "An") == 0);
  70   ASSERT (2 < len);
  71   free (line);
  72 
  73   /* Test growth of buffer.  */
  74   line = malloc (1);
  75   len = 1;
  76   result = getdelim (&line, &len, 'n', f);
  77   ASSERT (result == 3);
  78   ASSERT (strcmp (line, "bcn") == 0);
  79   ASSERT (3 < len);
  80 
  81   /* Test embedded NULs and EOF behavior.  */
  82   result = getdelim (&line, &len, 'n', f);
  83   ASSERT (result == 3);
  84   ASSERT (memcmp (line, "d\0f", 4) == 0);
  85   ASSERT (3 < len);
  86 
  87   result = getdelim (&line, &len, 'n', f);
  88   ASSERT (result == -1);
  89 
  90   free (line);
  91   fclose (f);
  92   remove ("test-getdelim.txt");
  93   return 0;
  94 }

/* */