LCOV - code coverage report
Current view: top level - lib/gltests - test-intprops.c (source / functions) Hit Total Coverage
Test: GNU Libidn Lines: 2 2 100.0 %
Date: 2015-03-02 11:46:03 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* Test intprops.h.
       2             :    Copyright (C) 2011-2015 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 of the License, or
       7             :    (at your option) 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 <http://www.gnu.org/licenses/>.  */
      16             : 
      17             : /* Written by Paul Eggert.  */
      18             : 
      19             : /* Tell gcc not to warn about the many (X < 0) expressions that
      20             :    the overflow macros expand to.  */
      21             : #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
      22             : # pragma GCC diagnostic ignored "-Wtype-limits"
      23             : #endif
      24             : 
      25             : #include <config.h>
      26             : 
      27             : #include "intprops.h"
      28             : #include "verify.h"
      29             : 
      30             : #include <stdbool.h>
      31             : #include <inttypes.h>
      32             : 
      33             : #include "macros.h"
      34             : 
      35             : /* VERIFY (X) uses a static assertion for compilers that are known to work,
      36             :    and falls back on a dynamic assertion for other compilers.
      37             :    These tests should be checkable via 'verify' rather than 'ASSERT', but
      38             :    using 'verify' would run into a bug with HP-UX 11.23 cc; see
      39             :    <http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00401.html>.  */
      40             : #if __GNUC__ || __SUNPRO_C
      41             : # define VERIFY(x) do { verify (x); } while (0)
      42             : #else
      43             : # define VERIFY(x) ASSERT (x)
      44             : #endif
      45             : 
      46             : int
      47           1 : main (void)
      48             : {
      49             :   /* Use VERIFY for tests that must be integer constant expressions,
      50             :      ASSERT otherwise.  */
      51             : 
      52             :   /* TYPE_IS_INTEGER.  */
      53             :   ASSERT (TYPE_IS_INTEGER (bool));
      54             :   ASSERT (TYPE_IS_INTEGER (char));
      55             :   ASSERT (TYPE_IS_INTEGER (signed char));
      56             :   ASSERT (TYPE_IS_INTEGER (unsigned char));
      57             :   ASSERT (TYPE_IS_INTEGER (short int));
      58             :   ASSERT (TYPE_IS_INTEGER (unsigned short int));
      59             :   ASSERT (TYPE_IS_INTEGER (int));
      60             :   ASSERT (TYPE_IS_INTEGER (unsigned int));
      61             :   ASSERT (TYPE_IS_INTEGER (long int));
      62             :   ASSERT (TYPE_IS_INTEGER (unsigned long int));
      63             :   ASSERT (TYPE_IS_INTEGER (intmax_t));
      64             :   ASSERT (TYPE_IS_INTEGER (uintmax_t));
      65             :   ASSERT (! TYPE_IS_INTEGER (float));
      66             :   ASSERT (! TYPE_IS_INTEGER (double));
      67             :   ASSERT (! TYPE_IS_INTEGER (long double));
      68             : 
      69             :   /* TYPE_SIGNED.  */
      70             :   /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
      71             :   VERIFY (TYPE_SIGNED (signed char));
      72             :   VERIFY (! TYPE_SIGNED (unsigned char));
      73             :   VERIFY (TYPE_SIGNED (short int));
      74             :   VERIFY (! TYPE_SIGNED (unsigned short int));
      75             :   VERIFY (TYPE_SIGNED (int));
      76             :   VERIFY (! TYPE_SIGNED (unsigned int));
      77             :   VERIFY (TYPE_SIGNED (long int));
      78             :   VERIFY (! TYPE_SIGNED (unsigned long int));
      79             :   VERIFY (TYPE_SIGNED (intmax_t));
      80             :   VERIFY (! TYPE_SIGNED (uintmax_t));
      81             :   ASSERT (TYPE_SIGNED (float));
      82             :   ASSERT (TYPE_SIGNED (double));
      83             :   ASSERT (TYPE_SIGNED (long double));
      84             : 
      85             :   /* Integer representation.  */
      86             :   VERIFY (INT_MIN + INT_MAX < 0
      87             :           ? (TYPE_TWOS_COMPLEMENT (int)
      88             :              && ! TYPE_ONES_COMPLEMENT (int) && ! TYPE_SIGNED_MAGNITUDE (int))
      89             :           : (! TYPE_TWOS_COMPLEMENT (int)
      90             :              && (TYPE_ONES_COMPLEMENT (int) || TYPE_SIGNED_MAGNITUDE (int))));
      91             : 
      92             :   /* TYPE_MINIMUM, TYPE_MAXIMUM.  */
      93             :   VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
      94             :   VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
      95             :   VERIFY (TYPE_MINIMUM (unsigned char) == 0);
      96             :   VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
      97             :   VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
      98             :   VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
      99             :   VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
     100             :   VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
     101             :   VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
     102             :   VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
     103             :   VERIFY (TYPE_MINIMUM (int) == INT_MIN);
     104             :   VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
     105             :   VERIFY (TYPE_MINIMUM (unsigned int) == 0);
     106             :   VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
     107             :   VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
     108             :   VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
     109             :   VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
     110             :   VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
     111             :   VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
     112             :   VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
     113             :   VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
     114             :   VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
     115             : 
     116             :   /* INT_BITS_STRLEN_BOUND.  */
     117             :   VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
     118             :   VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
     119             : 
     120             :   /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND.  */
     121             :   #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX.  */
     122             :   VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
     123             :   VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
     124             :   #endif
     125             :   #ifdef INT64_MAX
     126             :   VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
     127             :   VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
     128             :   #endif
     129             : 
     130             :   /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
     131             :      INT_<op>_OVERFLOW tests, so define a single macro to do both.  */
     132             :   #define CHECK_BINOP(op, a, b, min, max, overflow)                      \
     133             :     (INT_##op##_RANGE_OVERFLOW (a, b, min, max) == (overflow)            \
     134             :      && INT_##op##_OVERFLOW (a, b) == (overflow))
     135             :   #define CHECK_UNOP(op, a, min, max, overflow)                          \
     136             :     (INT_##op##_RANGE_OVERFLOW (a, min, max) == (overflow)               \
     137             :      && INT_##op##_OVERFLOW (a) == (overflow))
     138             : 
     139             :   /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW.  */
     140             :   VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
     141             :   VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
     142             :   VERIFY (CHECK_BINOP (ADD, INT_MAX, 1, INT_MIN, INT_MAX, true));
     143             :   VERIFY (CHECK_BINOP (ADD, INT_MAX, -1, INT_MIN, INT_MAX, false));
     144             :   VERIFY (CHECK_BINOP (ADD, INT_MIN, 1, INT_MIN, INT_MAX, false));
     145             :   VERIFY (CHECK_BINOP (ADD, INT_MIN, -1, INT_MIN, INT_MAX, true));
     146             :   VERIFY (CHECK_BINOP (ADD, UINT_MAX, 1u, 0u, UINT_MAX, true));
     147             :   VERIFY (CHECK_BINOP (ADD, 0u, 1u, 0u, UINT_MAX, false));
     148             : 
     149             :   VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, 1, INT_MIN, INT_MAX, false));
     150             :   VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, -1, INT_MIN, INT_MAX, true));
     151             :   VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, 1, INT_MIN, INT_MAX, true));
     152             :   VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, -1, INT_MIN, INT_MAX, false));
     153             :   VERIFY (CHECK_BINOP (SUBTRACT, UINT_MAX, 1u, 0u, UINT_MAX, false));
     154             :   VERIFY (CHECK_BINOP (SUBTRACT, 0u, 1u, 0u, UINT_MAX, true));
     155             : 
     156             :   VERIFY (CHECK_UNOP (NEGATE, INT_MIN, INT_MIN, INT_MAX,
     157             :                       TYPE_TWOS_COMPLEMENT (int)));
     158             :   VERIFY (CHECK_UNOP (NEGATE, 0, INT_MIN, INT_MAX, false));
     159             :   VERIFY (CHECK_UNOP (NEGATE, INT_MAX, INT_MIN, INT_MAX, false));
     160             :   VERIFY (CHECK_UNOP (NEGATE, 0u, 0u, UINT_MAX, false));
     161             :   VERIFY (CHECK_UNOP (NEGATE, 1u, 0u, UINT_MAX, true));
     162             :   VERIFY (CHECK_UNOP (NEGATE, UINT_MAX, 0u, UINT_MAX, true));
     163             : 
     164             :   VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MAX, INT_MIN, INT_MAX, true));
     165             :   VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MIN, INT_MIN, INT_MAX, true));
     166             :   VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MAX, INT_MIN, INT_MAX, true));
     167             :   VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MIN, INT_MIN, INT_MAX, true));
     168             :   VERIFY (CHECK_BINOP (MULTIPLY, -1, INT_MIN, INT_MIN, INT_MAX,
     169             :                        INT_NEGATE_OVERFLOW (INT_MIN)));
     170             :   VERIFY (CHECK_BINOP (MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
     171             :                        LONG_MIN, LONG_MIN, false));
     172             : 
     173             :   VERIFY (CHECK_BINOP (DIVIDE, INT_MIN, -1, INT_MIN, INT_MAX,
     174             :                        INT_NEGATE_OVERFLOW (INT_MIN)));
     175             :   VERIFY (CHECK_BINOP (DIVIDE, INT_MAX, 1, INT_MIN, INT_MAX, false));
     176             :   VERIFY (CHECK_BINOP (DIVIDE, (unsigned int) INT_MIN,
     177             :                        -1u, 0u, UINT_MAX, false));
     178             : 
     179             :   VERIFY (CHECK_BINOP (REMAINDER, INT_MIN, -1, INT_MIN, INT_MAX,
     180             :                        INT_NEGATE_OVERFLOW (INT_MIN)));
     181             :   VERIFY (CHECK_BINOP (REMAINDER, INT_MAX, 1, INT_MIN, INT_MAX, false));
     182             :   VERIFY (CHECK_BINOP (REMAINDER, (unsigned int) INT_MIN,
     183             :                        -1u, 0u, UINT_MAX, false));
     184             : 
     185             :   VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX, 1, 0u, UINT_MAX, true));
     186             :   VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2 + 1, 1, 0u, UINT_MAX, true));
     187             :   VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2, 1, 0u, UINT_MAX, false));
     188             : 
     189             :   /* INT_<op>_OVERFLOW with mixed types.  */
     190             :   #define CHECK_SUM(a, b, overflow)                       \
     191             :     VERIFY (INT_ADD_OVERFLOW (a, b) == (overflow));       \
     192             :     VERIFY (INT_ADD_OVERFLOW (b, a) == (overflow))
     193             :   CHECK_SUM (-1, LONG_MIN, true);
     194             :   CHECK_SUM (-1, UINT_MAX, false);
     195             :   CHECK_SUM (-1L, INT_MIN, INT_MIN == LONG_MIN);
     196             :   CHECK_SUM (0u, -1, true);
     197             :   CHECK_SUM (0u, 0, false);
     198             :   CHECK_SUM (0u, 1, false);
     199             :   CHECK_SUM (1, LONG_MAX, true);
     200             :   CHECK_SUM (1, UINT_MAX, true);
     201             :   CHECK_SUM (1L, INT_MAX, INT_MAX == LONG_MAX);
     202             :   CHECK_SUM (1u, INT_MAX, INT_MAX == UINT_MAX);
     203             :   CHECK_SUM (1u, INT_MIN, true);
     204             : 
     205             :   VERIFY (! INT_SUBTRACT_OVERFLOW (INT_MAX, 1u));
     206             :   VERIFY (! INT_SUBTRACT_OVERFLOW (UINT_MAX, 1));
     207             :   VERIFY (! INT_SUBTRACT_OVERFLOW (0u, -1));
     208             :   VERIFY (INT_SUBTRACT_OVERFLOW (UINT_MAX, -1));
     209             :   VERIFY (INT_SUBTRACT_OVERFLOW (INT_MIN, 1u));
     210             :   VERIFY (INT_SUBTRACT_OVERFLOW (-1, 0u));
     211             : 
     212             :   #define CHECK_PRODUCT(a, b, overflow)                   \
     213             :     VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (overflow));   \
     214             :     VERIFY (INT_MULTIPLY_OVERFLOW (b, a) == (overflow))
     215             : 
     216             :   CHECK_PRODUCT (-1, 1u, true);
     217             :   CHECK_PRODUCT (-1, INT_MIN, INT_NEGATE_OVERFLOW (INT_MIN));
     218             :   CHECK_PRODUCT (-1, UINT_MAX, true);
     219             :   CHECK_PRODUCT (-12345, LONG_MAX / -12345 - 1, true);
     220             :   CHECK_PRODUCT (-12345, LONG_MAX / -12345, false);
     221             :   CHECK_PRODUCT (0, -1, false);
     222             :   CHECK_PRODUCT (0, 0, false);
     223             :   CHECK_PRODUCT (0, 0u, false);
     224             :   CHECK_PRODUCT (0, 1, false);
     225             :   CHECK_PRODUCT (0, INT_MAX, false);
     226             :   CHECK_PRODUCT (0, INT_MIN, false);
     227             :   CHECK_PRODUCT (0, UINT_MAX, false);
     228             :   CHECK_PRODUCT (0u, -1, false);
     229             :   CHECK_PRODUCT (0u, 0, false);
     230             :   CHECK_PRODUCT (0u, 0u, false);
     231             :   CHECK_PRODUCT (0u, 1, false);
     232             :   CHECK_PRODUCT (0u, INT_MAX, false);
     233             :   CHECK_PRODUCT (0u, INT_MIN, false);
     234             :   CHECK_PRODUCT (0u, UINT_MAX, false);
     235             :   CHECK_PRODUCT (1, INT_MAX, false);
     236             :   CHECK_PRODUCT (1, INT_MIN, false);
     237             :   CHECK_PRODUCT (1, UINT_MAX, false);
     238             :   CHECK_PRODUCT (1u, INT_MIN, true);
     239             :   CHECK_PRODUCT (1u, INT_MAX, UINT_MAX < INT_MAX);
     240             :   CHECK_PRODUCT (INT_MAX, UINT_MAX, true);
     241             :   CHECK_PRODUCT (INT_MAX, ULONG_MAX, true);
     242             :   CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, true);
     243             :   CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN, false);
     244             :   CHECK_PRODUCT (INT_MIN, UINT_MAX, true);
     245             :   CHECK_PRODUCT (INT_MIN, ULONG_MAX, true);
     246             : 
     247             :   VERIFY (INT_DIVIDE_OVERFLOW (INT_MIN, -1L)
     248             :           == (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
     249             :   VERIFY (! INT_DIVIDE_OVERFLOW (INT_MIN, UINT_MAX));
     250             :   VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINTMAX_MAX));
     251             :   VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINT_MAX));
     252             :   VERIFY (INT_DIVIDE_OVERFLOW (-11, 10u));
     253             :   VERIFY (INT_DIVIDE_OVERFLOW (-10, 10u));
     254             :   VERIFY (! INT_DIVIDE_OVERFLOW (-9, 10u));
     255             :   VERIFY (INT_DIVIDE_OVERFLOW (11u, -10));
     256             :   VERIFY (INT_DIVIDE_OVERFLOW (10u, -10));
     257             :   VERIFY (! INT_DIVIDE_OVERFLOW (9u, -10));
     258             : 
     259             :   VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, -1L)
     260             :           == (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
     261             :   VERIFY (INT_REMAINDER_OVERFLOW (-1, UINT_MAX));
     262             :   VERIFY (INT_REMAINDER_OVERFLOW ((intmax_t) -1, UINTMAX_MAX));
     263             :   VERIFY (INT_REMAINDER_OVERFLOW (INTMAX_MIN, UINT_MAX)
     264             :           == (INTMAX_MAX < UINT_MAX
     265             :               && - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
     266             :   VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, ULONG_MAX)
     267             :           == (INT_MIN % ULONG_MAX != 1));
     268             :   VERIFY (! INT_REMAINDER_OVERFLOW (1u, -1));
     269             :   VERIFY (! INT_REMAINDER_OVERFLOW (37*39u, -39));
     270             :   VERIFY (INT_REMAINDER_OVERFLOW (37*39u + 1, -39));
     271             :   VERIFY (INT_REMAINDER_OVERFLOW (37*39u - 1, -39));
     272             :   VERIFY (! INT_REMAINDER_OVERFLOW (LONG_MAX, -INT_MAX));
     273             : 
     274           1 :   return 0;
     275             : }

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