summaryrefslogtreecommitdiff
path: root/gl/tests/test-getdelim.c
blob: 76aba827dbbd1ebba502a87c9e6a0ab82f23a5a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
/* Test of getdelim() function.
   Copyright (C) 2007-2014 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <http://www.gnu.org/licenses/>.  */

/* Written by Eric Blake <ebb9@byu.net>, 2007.  */

#include <config.h>

#include <stdio.h>

#include "signature.h"
SIGNATURE_CHECK (getdelim, ssize_t, (char **, size_t *, int, FILE *));

#include <stdlib.h>
#include <string.h>

#include "macros.h"

int
main (void)
{
  FILE *f;
  char *line;
  size_t len;
  ssize_t result;

  /* Create test file.  */
  f = fopen ("test-getdelim.txt", "wb");
  if (!f || fwrite ("anAnbcnd\0f", 1, 10, f) != 10 || fclose (f) != 0)
    {
      fputs ("Failed to create sample file.\n", stderr);
      remove ("test-getdelim.txt");
      return 1;
    }
  f = fopen ("test-getdelim.txt", "rb");
  if (!f)
    {
      fputs ("Failed to reopen sample file.\n", stderr);
      remove ("test-getdelim.txt");
      return 1;
    }

  /* Test initial allocation, which must include trailing NUL.  */
  line = NULL;
  len = 0;
  result = getdelim (&line, &len, 'n', f);
  ASSERT (result == 2);
  ASSERT (strcmp (line, "an") == 0);
  ASSERT (2 < len);
  free (line);

  /* Test initial allocation again, with line = NULL and len != 0.  */
  line = NULL;
  len = (size_t)(~0) / 4;
  result = getdelim (&line, &len, 'n', f);
  ASSERT (result == 2);
  ASSERT (strcmp (line, "An") == 0);
  ASSERT (2 < len);
  free (line);

  /* Test growth of buffer.  */
  line = malloc (1);
  len = 1;
  result = getdelim (&line, &len, 'n', f);
  ASSERT (result == 3);
  ASSERT (strcmp (line, "bcn") == 0);
  ASSERT (3 < len);

  /* Test embedded NULs and EOF behavior.  */
  result = getdelim (&line, &len, 'n', f);
  ASSERT (result == 3);
  ASSERT (memcmp (line, "d\0f", 4) == 0);
  ASSERT (3 < len);

  result = getdelim (&line, &len, 'n', f);
  ASSERT (result == -1);

  free (line);
  fclose (f);
  remove ("test-getdelim.txt");
  return 0;
}