tests/test-getndelim2.c

   1 /* Test of getndelim2() function.
   2    Copyright (C) 2008-2021 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>, 2008.  */
  18
  19 #include <config.h>
  20
  21 #include "getndelim2.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "macros.h"
  28
  29 int
  30 main (void)
  31 {
  32   FILE *f;
  33   char *line = NULL;
  34   size_t len = 0;
  35   ssize_t result;
  36
  37   /* Create test file.  */
  38   f = fopen ("test-getndelim2.txt", "wb+");
  39   if (!f || fwrite ("a\nbc\nd\0f", 1, 8, f) != 8)
  40     {
  41       fputs ("Failed to create sample file.\n", stderr);
  42       remove ("test-getndelim2.txt");
  43       return 1;
  44     }
  45   rewind (f);
  46
  47   /* Unlimited lines.  */
  48
  49   /* Test initial allocation, which must include trailing NUL.  */
  50   result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, '\n', '\n', f);
  51   ASSERT (result == 2);
  52   ASSERT (strcmp (line, "a\n") == 0);
  53   ASSERT (2 < len);
  54
  55   /* Test growth of buffer, must not leak.  */
  56   free (line);
  57   line = malloc (1);
  58   len = 0;
  59   result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, EOF, '\n', f);
  60   ASSERT (result == 3);
  61   ASSERT (strcmp (line, "bc\n") == 0);
  62   ASSERT (3 < len);
  63
  64   /* Test embedded NULs and EOF behavior.  */
  65   result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, '\n', EOF, f);
  66   ASSERT (result == 3);
  67   ASSERT (memcmp (line, "d\0f", 4) == 0);
  68   ASSERT (3 < len);
  69
  70   result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, '\n', EOF, f);
  71   ASSERT (result == -1);
  72
  73   /* Using offset and nmax.  */
  74
  75   /* Limit growth to four bytes, including NUL, but parse to next 'd'.  */
  76   free (line);
  77   rewind (f);
  78   line = malloc (8);
  79   memset (line, 'e', 8);
  80   len = 8;
  81   result = getndelim2 (&line, &len, 6, 10, 'd', 'd', f);
  82   ASSERT (result == 3);
  83   ASSERT (10 == len);
  84   ASSERT (strcmp (line, "eeeeeea\nb") == 0);
  85
  86   /* No change if offset larger than limit.  */
  87   result = getndelim2 (&line, &len, len, 1, EOF, EOF, f);
  88   ASSERT (result == -1);
  89   ASSERT (10 == len);
  90   ASSERT (strcmp (line, "eeeeeea\nb") == 0);
  91
  92   /* Consume to end of file, including embedded NUL.  */
  93   result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, EOF, EOF, f);
  94   ASSERT (result == 2);
  95   ASSERT (10 == len);
  96   ASSERT (memcmp (line, "\0f\0eeea\nb", 10) == 0);
  97
  98   result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, '\n', '\r', f);
  99   ASSERT (result == -1);
 100
 101   /* Larger file size.  */
 102   rewind (f);
 103   {
 104     int i;
 105     for (i = 0; i < 16; i++)
 106       fprintf (f, "%500x%c", i + 0u, i % 2 ? '\n' : '\r');
 107   }
 108   rewind (f);
 109   {
 110     char buffer[502];
 111
 112     result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, '\n', '\r', f);
 113     ASSERT (result == 501);
 114     ASSERT (501 < len);
 115     memset (buffer, ' ', 499);
 116     buffer[499] = '0';
 117     buffer[500] = '\r';
 118     buffer[501] = '\0';
 119     ASSERT (strcmp (buffer, line) == 0);
 120
 121     result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, '\n', '\r', f);
 122     ASSERT (result == 501);
 123     ASSERT (501 < len);
 124     buffer[499] = '1';
 125     buffer[500] = '\n';
 126     ASSERT (strcmp (buffer, line) == 0);
 127
 128     result = getndelim2 (&line, &len, 0, GETNLINE_NO_LIMIT, 'g', 'f', f);
 129     ASSERT (result == 501 * 14 - 1);
 130     ASSERT (501 * 14 <= len);
 131     buffer[499] = 'f';
 132     buffer[500] = '\0';
 133     ASSERT (strcmp (buffer, line + 501 * 13) == 0);
 134
 135     result = getndelim2 (&line, &len, 501 * 14 - 1, GETNLINE_NO_LIMIT,
 136                          EOF, EOF, f);
 137     ASSERT (result == 1);
 138     buffer[500] = '\n';
 139     ASSERT (strcmp (buffer, line + 501 * 13) == 0);
 140
 141     result = getndelim2 (&line, &len, 501 * 14 - 1, GETNLINE_NO_LIMIT,
 142                          EOF, EOF, f);
 143     buffer[500] = '\0';
 144     ASSERT (strcmp (buffer, line + 501 * 13) == 0);
 145     ASSERT (result == -1);
 146   }
 147
 148   fclose (f);
 149   remove ("test-getndelim2.txt");
 150   return 0;
 151 }