contrib/libjeffpc/test_array.c

   1 /*
   2  * Copyright (c) 2016 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include <jeffpc/types.h>
  24
  25 #include "test.c"
  26
  27 struct foo {
  28         int a;
  29         char b;
  30 };
  31
  32 union bar {
  33         int a;
  34         char b;
  35 };
  36
  37 #define TEST_ONE(type, nelem)                                   \
  38         do {                                                    \
  39                 type test_array[nelem];                         \
  40                 size_t res = ARRAY_LEN(test_array);             \
  41                                                                 \
  42                 fprintf(stderr, "   %-16s test_array[%lu]\t=> %zu...",\
  43                         #type, nelem, res);                     \
  44                                                                 \
  45                 if (res != nelem)                               \
  46                         fail("expected %zu, got %zu", nelem,    \
  47                              res);                              \
  48                                                                 \
  49                 fprintf(stderr, "ok.\n");                       \
  50         } while (0)
  51
  52 #define TEST_TYPES(nelem)                                       \
  53         do {                                                    \
  54                 TEST_ONE(int8_t, nelem);                        \
  55                 TEST_ONE(int16_t, nelem);                       \
  56                 TEST_ONE(int32_t, nelem);                       \
  57                 TEST_ONE(int64_t, nelem);                       \
  58                 TEST_ONE(uint8_t, nelem);                       \
  59                 TEST_ONE(uint16_t, nelem);                      \
  60                 TEST_ONE(uint32_t, nelem);                      \
  61                 TEST_ONE(uint64_t, nelem);                      \
  62                 TEST_ONE(char, nelem);                          \
  63                 TEST_ONE(signed char, nelem);                   \
  64                 TEST_ONE(unsigned char, nelem);                 \
  65                 TEST_ONE(short, nelem);                         \
  66                 TEST_ONE(signed short, nelem);                  \
  67                 TEST_ONE(unsigned short, nelem);                        \
  68                 TEST_ONE(int, nelem);                           \
  69                 TEST_ONE(signed int, nelem);                    \
  70                 TEST_ONE(unsigned int, nelem);                  \
  71                 TEST_ONE(long, nelem);                          \
  72                 TEST_ONE(signed long, nelem);                   \
  73                 TEST_ONE(unsigned long, nelem);                 \
  74                 TEST_ONE(void *, nelem);                        \
  75                 TEST_ONE(intptr_t, nelem);                      \
  76                 TEST_ONE(uintptr_t, nelem);                     \
  77                 TEST_ONE(ptrdiff_t, nelem);                     \
  78                 TEST_ONE(struct foo, nelem);                    \
  79                 TEST_ONE(struct foo *, nelem);                  \
  80                 TEST_ONE(union bar, nelem);                     \
  81                 TEST_ONE(union bar *, nelem);                   \
  82         } while (0)
  83
  84 static void test_array_len(void)
  85 {
  86         int i;
  87
  88         fprintf(stderr, "testing ARRAY_LEN with various types & lengths\n");
  89
  90         /*
  91          * Note:
  92          *
  93          * We try to create arrays up to 2**24 (16777216) elements in size
  94          * right on the stack.  This can make the process size huge in no
  95          * time if we feed TEST_ONE a type that is large to begin with.
  96          */
  97         for (i = 0; i <= 24; i++)
  98                 TEST_TYPES(1UL << i);
  99
 100         fprintf(stderr, "All ARRAY_LEN tests passed.\n");
 101 }
 102
 103 void test(void)
 104 {
 105         test_array_len();
 106 }