malloc/tst-scratch_buffer.c

   1 /*
   2    Copyright (C) 2015-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <array_length.h>
  20 #include <scratch_buffer.h>
  21 #include <support/check.h>
  22 #include <support/support.h>
  23 #include <stdbool.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 static bool
  28 unchanged_array_size (struct scratch_buffer *buf, size_t a, size_t b)
  29 {
  30   size_t old_length = buf->length;
  31   if (!scratch_buffer_set_array_size (buf, a, b))
  32     {
  33       printf ("scratch_buffer_set_array_size failed: %zu %zu\n",
  34               a, b);
  35       return false;
  36     }
  37   if (old_length != buf->length)
  38     {
  39       printf ("scratch_buffer_set_array_size did not preserve size: %zu %zu\n",
  40               a, b);
  41       return false;
  42     }
  43   return true;
  44 }
  45
  46 static bool
  47 array_size_must_fail (size_t a, size_t b)
  48 {
  49   for (int pass = 0; pass < 2; ++pass)
  50     {
  51       struct scratch_buffer buf;
  52       scratch_buffer_init (&buf);
  53       if (pass > 0)
  54         if (!scratch_buffer_grow (&buf))
  55           {
  56             printf ("scratch_buffer_grow in array_size_must_fail failed\n");
  57             return false;
  58           }
  59       if (scratch_buffer_set_array_size (&buf, a, b))
  60         {
  61           printf ("scratch_buffer_set_array_size passed: %d %zu %zu\n",
  62                   pass, a, b);
  63           return false;
  64         }
  65       if (buf.data != buf.__space.__c)
  66         {
  67           printf ("scratch_buffer_set_array_size did not free: %d %zu %zu\n",
  68                   pass, a, b);
  69           return false;
  70         }
  71     }
  72   return true;
  73 }
  74
  75 static int
  76 do_test (void)
  77 {
  78   {
  79     struct scratch_buffer buf;
  80     scratch_buffer_init (&buf);
  81     memset (buf.data, ' ', buf.length);
  82     scratch_buffer_free (&buf);
  83   }
  84   {
  85     struct scratch_buffer buf;
  86     scratch_buffer_init (&buf);
  87     memset (buf.data, ' ', buf.length);
  88     size_t old_length = buf.length;
  89     scratch_buffer_grow (&buf);
  90     if (buf.length <= old_length)
  91       {
  92         printf ("scratch_buffer_grow did not enlarge buffer\n");
  93         return 1;
  94       }
  95     memset (buf.data, ' ', buf.length);
  96     scratch_buffer_free (&buf);
  97   }
  98   {
  99     struct scratch_buffer buf;
 100     scratch_buffer_init (&buf);
 101     memset (buf.data, '@', buf.length);
 102     strcpy (buf.data, "prefix");
 103     size_t old_length = buf.length;
 104     scratch_buffer_grow_preserve (&buf);
 105     if (buf.length <= old_length)
 106       {
 107         printf ("scratch_buffer_grow_preserve did not enlarge buffer\n");
 108         return 1;
 109       }
 110     if (strcmp (buf.data, "prefix") != 0)
 111       {
 112         printf ("scratch_buffer_grow_preserve did not copy buffer\n");
 113         return 1;
 114       }
 115     for (unsigned i = 7; i < old_length; ++i)
 116       if (((char *)buf.data)[i] != '@')
 117         {
 118           printf ("scratch_buffer_grow_preserve did not copy buffer (%u)\n",
 119                   i);
 120           return 1;
 121         }
 122     scratch_buffer_free (&buf);
 123   }
 124   {
 125     struct scratch_buffer buf;
 126     scratch_buffer_init (&buf);
 127     for (int pass = 0; pass < 4; ++pass)
 128       {
 129         if (!(unchanged_array_size (&buf, 0, 0)
 130               && unchanged_array_size (&buf, 1, 0)
 131               && unchanged_array_size (&buf, 0, 1)
 132               && unchanged_array_size (&buf, -1, 0)
 133               && unchanged_array_size (&buf, 0, -1)
 134               && unchanged_array_size (&buf, 1ULL << 16, 0)
 135               && unchanged_array_size (&buf, 0, 1ULL << 16)
 136               && unchanged_array_size (&buf, (size_t) (1ULL << 32), 0)
 137               && unchanged_array_size (&buf, 0, (size_t) (1ULL << 32))))
 138           return 1;
 139         if (!scratch_buffer_grow (&buf))
 140           {
 141             printf ("scratch_buffer_grow_failed (pass %d)\n", pass);
 142           }
 143       }
 144     scratch_buffer_free (&buf);
 145   }
 146   {
 147     if (!(array_size_must_fail (-1, 1)
 148           && array_size_must_fail (-1, -1)
 149           && array_size_must_fail (1, -1)
 150           && array_size_must_fail (((size_t)-1) / 4, 4)
 151           && array_size_must_fail (4, ((size_t)-1) / 4)))
 152         return 1;
 153   }
 154   return 0;
 155 }
 156
 157 #include <support/test-driver.c>