diff options
Diffstat (limited to 'gnulib-tests/test-intprops.c')
| -rw-r--r-- | gnulib-tests/test-intprops.c | 441 |
1 files changed, 441 insertions, 0 deletions
diff --git a/gnulib-tests/test-intprops.c b/gnulib-tests/test-intprops.c new file mode 100644 index 0000000..a56b18e --- /dev/null +++ b/gnulib-tests/test-intprops.c @@ -0,0 +1,441 @@ +/* Test intprops.h. + Copyright (C) 2011-2020 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 of the License, 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 <https://www.gnu.org/licenses/>. */ + +/* Written by Paul Eggert. */ + +/* Tell gcc not to warn about the long expressions that the overflow + macros expand to, or about the (X < 0) expressions. */ +#if 4 < __GNUC__ + (3 <= __GNUC_MINOR__) +# pragma GCC diagnostic ignored "-Woverlength-strings" +# pragma GCC diagnostic ignored "-Wtype-limits" + +/* Work around a bug in GCC 6.1 and earlier; see: + https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68971 */ +# pragma GCC diagnostic ignored "-Woverflow" + +#endif + +#include <config.h> + +#include "intprops.h" +#include "verify.h" + +#include <stdbool.h> +#include <inttypes.h> +#include <limits.h> + +#include "macros.h" + +/* Compile-time verification of expression X. + In this file, we need it as a statement, rather than as a declaration. */ +#define verify_stmt(x) do { verify (x); } while (0) + +/* VERIFY (X) uses a static assertion for compilers that are known to work, + and falls back on a dynamic assertion for other compilers. + These tests should be checkable via 'verify' rather than 'ASSERT', but + using 'verify' would run into a bug with HP-UX 11.23 cc; see + <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00401.html>. */ +#if __GNUC__ || __SUNPRO_C +# define VERIFY(x) verify_stmt (x) +#else +# define VERIFY(x) ASSERT (x) +#endif + +#define DONTCARE __LINE__ + +int int_minus_2 = -2; +int int_1 = 1; + +int +main (void) +{ + /* Use VERIFY for tests that must be integer constant expressions, + ASSERT otherwise. */ + + /* TYPE_IS_INTEGER. */ + ASSERT (TYPE_IS_INTEGER (bool)); + ASSERT (TYPE_IS_INTEGER (char)); + ASSERT (TYPE_IS_INTEGER (signed char)); + ASSERT (TYPE_IS_INTEGER (unsigned char)); + ASSERT (TYPE_IS_INTEGER (short int)); + ASSERT (TYPE_IS_INTEGER (unsigned short int)); + ASSERT (TYPE_IS_INTEGER (int)); + ASSERT (TYPE_IS_INTEGER (unsigned int)); + ASSERT (TYPE_IS_INTEGER (long int)); + ASSERT (TYPE_IS_INTEGER (unsigned long int)); + ASSERT (TYPE_IS_INTEGER (intmax_t)); + ASSERT (TYPE_IS_INTEGER (uintmax_t)); + ASSERT (! TYPE_IS_INTEGER (float)); + ASSERT (! TYPE_IS_INTEGER (double)); + ASSERT (! TYPE_IS_INTEGER (long double)); + + /* TYPE_SIGNED. */ + /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */ + VERIFY (TYPE_SIGNED (signed char)); + VERIFY (! TYPE_SIGNED (unsigned char)); + VERIFY (TYPE_SIGNED (short int)); + VERIFY (! TYPE_SIGNED (unsigned short int)); + VERIFY (TYPE_SIGNED (int)); + VERIFY (! TYPE_SIGNED (unsigned int)); + VERIFY (TYPE_SIGNED (long int)); + VERIFY (! TYPE_SIGNED (unsigned long int)); + VERIFY (TYPE_SIGNED (intmax_t)); + VERIFY (! TYPE_SIGNED (uintmax_t)); + ASSERT (TYPE_SIGNED (float)); + ASSERT (TYPE_SIGNED (double)); + ASSERT (TYPE_SIGNED (long double)); + + /* Integer representation. Check that it is two's complement. */ + VERIFY (INT_MIN + INT_MAX < 0); + + /* TYPE_MINIMUM, TYPE_MAXIMUM. */ + VERIFY (TYPE_MINIMUM (char) == CHAR_MIN); + VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX); + VERIFY (TYPE_MINIMUM (unsigned char) == 0); + VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX); + VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN); + VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX); + VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN); + VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX); + VERIFY (TYPE_MINIMUM (unsigned short int) == 0); + VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX); + VERIFY (TYPE_MINIMUM (int) == INT_MIN); + VERIFY (TYPE_MAXIMUM (int) == INT_MAX); + VERIFY (TYPE_MINIMUM (unsigned int) == 0); + VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX); + VERIFY (TYPE_MINIMUM (long int) == LONG_MIN); + VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX); + VERIFY (TYPE_MINIMUM (unsigned long int) == 0); + VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX); + #ifdef LLONG_MAX + verify_stmt (TYPE_MINIMUM (long long int) == LLONG_MIN); + verify_stmt (TYPE_MAXIMUM (long long int) == LLONG_MAX); + verify_stmt (TYPE_MINIMUM (unsigned long long int) == 0); + verify_stmt (TYPE_MAXIMUM (unsigned long long int) == ULLONG_MAX); + #endif + VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN); + VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX); + VERIFY (TYPE_MINIMUM (uintmax_t) == 0); + VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX); + + /* TYPE_WIDTH. */ + #ifdef CHAR_WIDTH + verify_stmt (TYPE_WIDTH (char) == CHAR_WIDTH); + verify_stmt (TYPE_WIDTH (signed char) == SCHAR_WIDTH); + verify_stmt (TYPE_WIDTH (unsigned char) == UCHAR_WIDTH); + verify_stmt (TYPE_WIDTH (short int) == SHRT_WIDTH); + verify_stmt (TYPE_WIDTH (unsigned short int) == USHRT_WIDTH); + verify_stmt (TYPE_WIDTH (int) == INT_WIDTH); + verify_stmt (TYPE_WIDTH (unsigned int) == UINT_WIDTH); + verify_stmt (TYPE_WIDTH (long int) == LONG_WIDTH); + verify_stmt (TYPE_WIDTH (unsigned long int) == ULONG_WIDTH); + #ifdef LLONG_WIDTH + verify_stmt (TYPE_WIDTH (long long int) == LLONG_WIDTH); + verify_stmt (TYPE_WIDTH (unsigned long long int) == ULLONG_WIDTH); + #endif + #endif + + /* INT_BITS_STRLEN_BOUND. */ + VERIFY (INT_BITS_STRLEN_BOUND (1) == 1); + VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789); + + /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND. */ + #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX. */ + VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1); + VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648")); + #endif + #ifdef INT64_MAX + VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1); + VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808")); + #endif + + /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as + INT_<op>_OVERFLOW tests, so define macros to do both. OP is the + operation, OPNAME its symbolic name, A and B its operands, T the + result type, V the overflow flag, and VRES the result if V and if + two's complement. CHECK_BINOP is for most binary operatinos, + CHECK_SBINOP for binary +, -, * when the result type is signed, + and CHECK_UNOP for unary operations. */ + #define CHECK_BINOP(op, opname, a, b, t, v, vres) \ + VERIFY (INT_##opname##_RANGE_OVERFLOW (a, b, TYPE_MINIMUM (t), \ + TYPE_MAXIMUM (t)) \ + == (v)); \ + VERIFY (INT_##opname##_OVERFLOW (a, b) == (v)) + #define CHECK_SBINOP(op, opname, a, b, t, v, vres) \ + CHECK_BINOP(op, opname, a, b, t, v, vres); \ + { \ + t result; \ + ASSERT (INT_##opname##_WRAPV (a, b, &result) == (v)); \ + ASSERT (result == ((v) ? (vres) : ((a) op (b)))); \ + } + #define CHECK_UNOP(op, opname, a, t, v) \ + VERIFY (INT_##opname##_RANGE_OVERFLOW (a, TYPE_MINIMUM (t), \ + TYPE_MAXIMUM (t)) \ + == (v)); \ + VERIFY (INT_##opname##_OVERFLOW (a) == (v)) + + /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW. */ + VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX)); + VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1)); + + CHECK_SBINOP (+, ADD, INT_MAX, 1, int, true, INT_MIN); + CHECK_SBINOP (+, ADD, INT_MAX, -1, int, false, INT_MAX - 1); + CHECK_SBINOP (+, ADD, INT_MIN, 1, int, false, INT_MIN + 1); + CHECK_SBINOP (+, ADD, INT_MIN, -1, int, true, INT_MAX); + CHECK_BINOP (+, ADD, UINT_MAX, 1u, unsigned int, true, 0u); + CHECK_BINOP (+, ADD, 0u, 1u, unsigned int, false, 1u); + + CHECK_SBINOP (-, SUBTRACT, INT_MAX, 1, int, false, INT_MAX - 1); + CHECK_SBINOP (-, SUBTRACT, INT_MAX, -1, int, true, INT_MIN); + CHECK_SBINOP (-, SUBTRACT, INT_MIN, 1, int, true, INT_MAX); + CHECK_SBINOP (-, SUBTRACT, INT_MIN, -1, int, false, INT_MIN - -1); + CHECK_BINOP (-, SUBTRACT, UINT_MAX, 1u, unsigned int, false, UINT_MAX - 1u); + CHECK_BINOP (-, SUBTRACT, 0u, 1u, unsigned int, true, 0u - 1u); + + CHECK_UNOP (-, NEGATE, INT_MIN, int, true); + CHECK_UNOP (-, NEGATE, 0, int, false); + CHECK_UNOP (-, NEGATE, INT_MAX, int, false); + CHECK_UNOP (-, NEGATE, 0u, unsigned int, false); + CHECK_UNOP (-, NEGATE, 1u, unsigned int, true); + CHECK_UNOP (-, NEGATE, UINT_MAX, unsigned int, true); + + CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MAX, int, true, 1); + CHECK_SBINOP (*, MULTIPLY, INT_MAX, INT_MIN, int, true, INT_MIN); + CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MAX, int, true, INT_MIN); + CHECK_SBINOP (*, MULTIPLY, INT_MIN, INT_MIN, int, true, 0); + CHECK_SBINOP (*, MULTIPLY, -1, INT_MIN, int, + INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN); +#if !defined __HP_cc + CHECK_SBINOP (*, MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX, + long int, false, LONG_MIN - LONG_MIN % INT_MAX); +#endif + + CHECK_BINOP (/, DIVIDE, INT_MIN, -1, int, + INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN); + CHECK_BINOP (/, DIVIDE, INT_MAX, 1, int, false, INT_MAX); + CHECK_BINOP (/, DIVIDE, (unsigned int) INT_MIN, -1u, unsigned int, + false, INT_MIN / -1u); + + CHECK_BINOP (%, REMAINDER, INT_MIN, -1, int, INT_NEGATE_OVERFLOW (INT_MIN), 0); + CHECK_BINOP (%, REMAINDER, INT_MAX, 1, int, false, 0); + CHECK_BINOP (%, REMAINDER, (unsigned int) INT_MIN, -1u, unsigned int, + false, INT_MIN % -1u); + + CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX, 1, unsigned int, true, UINT_MAX << 1); + CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2 + 1, 1, unsigned int, true, + (UINT_MAX / 2 + 1) << 1); + CHECK_BINOP (<<, LEFT_SHIFT, UINT_MAX / 2, 1, unsigned int, false, + (UINT_MAX / 2) << 1); + + /* INT_<op>_OVERFLOW and INT_<op>_WRAPV with mixed types. */ + #define CHECK_SUM(a, b, t, v, vres) \ + CHECK_SUM1 (a, b, t, v, vres); \ + CHECK_SUM1 (b, a, t, v, vres) + #define CHECK_SUM_WRAPV(a, b, t, v, vres, okres) \ + CHECK_SUM_WRAPV1 (a, b, t, v, vres, okres); \ + CHECK_SUM_WRAPV1 (b, a, t, v, vres, okres) + #define CHECK_SUM1(a, b, t, v, vres) \ + VERIFY (INT_ADD_OVERFLOW (a, b) == (v)); \ + CHECK_SUM_WRAPV1 (a, b, t, v, vres, (a) + (b)) + #define CHECK_SUM_WRAPV1(a, b, t, v, vres, okres) \ + { \ + t result; \ + ASSERT (INT_ADD_WRAPV (a, b, &result) == (v)); \ + ASSERT (result == ((v) ? (vres) : (okres))); \ + } + CHECK_SUM (-1, LONG_MIN, long int, true, LONG_MAX); + CHECK_SUM (-1, UINT_MAX, unsigned int, false, DONTCARE); + CHECK_SUM (-1L, INT_MIN, long int, INT_MIN == LONG_MIN, + INT_MIN == LONG_MIN ? INT_MAX : DONTCARE); + CHECK_SUM (0u, -1, unsigned int, true, 0u + -1); + CHECK_SUM (0u, 0, unsigned int, false, DONTCARE); + CHECK_SUM (0u, 1, unsigned int, false, DONTCARE); + CHECK_SUM (1, LONG_MAX, long int, true, LONG_MIN); + CHECK_SUM (1, UINT_MAX, unsigned int, true, 0u); + CHECK_SUM (1L, INT_MAX, long int, INT_MAX == LONG_MAX, + INT_MAX == LONG_MAX ? INT_MIN : DONTCARE); + CHECK_SUM (1u, INT_MAX, unsigned int, INT_MAX == UINT_MAX, 1u + INT_MAX); + CHECK_SUM (1u, INT_MIN, unsigned int, true, 1u + INT_MIN); + CHECK_SUM_WRAPV (-1, 1u, int, false, DONTCARE, 0); + CHECK_SUM_WRAPV (-1, 1ul, int, false, DONTCARE, 0); + CHECK_SUM_WRAPV (-1l, 1u, int, false, DONTCARE, 0); + CHECK_SUM_WRAPV (-100, 1000u, int, false, DONTCARE, 900); + CHECK_SUM_WRAPV (INT_MIN, UINT_MAX, int, false, DONTCARE, INT_MAX); + CHECK_SUM_WRAPV (1u, INT_MAX, int, true, INT_MIN, DONTCARE); + CHECK_SUM_WRAPV (INT_MAX, 1, long int, LONG_MAX <= INT_MAX, INT_MIN, + INT_MAX + 1L); + CHECK_SUM_WRAPV (UINT_MAX, 1, long int, LONG_MAX <= UINT_MAX, 0, + UINT_MAX + 1L); + CHECK_SUM_WRAPV (INT_MAX, 1, unsigned long int, ULONG_MAX <= INT_MAX, 0, + INT_MAX + 1uL); + CHECK_SUM_WRAPV (UINT_MAX, 1, unsigned long int, ULONG_MAX <= UINT_MAX, 0, + UINT_MAX + 1uL); + + { + long int result; + ASSERT (INT_ADD_WRAPV (1, INT_MAX, &result) == (INT_MAX == LONG_MAX)); + ASSERT (INT_ADD_WRAPV (-1, INT_MIN, &result) == (INT_MIN == LONG_MIN)); + } + + #define CHECK_DIFFERENCE(a, b, t, v, vres) \ + VERIFY (INT_SUBTRACT_OVERFLOW (a, b) == (v)) + #define CHECK_SDIFFERENCE(a, b, t, v, vres) \ + CHECK_DIFFERENCE (a, b, t, v, vres); \ + CHECK_SDIFFERENCE_WRAPV (a, b, t, v, vres) + #define CHECK_SDIFFERENCE_WRAPV(a, b, t, v, vres) \ + { \ + t result; \ + ASSERT (INT_SUBTRACT_WRAPV (a, b, &result) == (v)); \ + ASSERT (result == ((v) ? (vres) : ((a) - (b)))); \ + } + CHECK_DIFFERENCE (INT_MAX, 1u, unsigned int, UINT_MAX < INT_MAX - 1, + INT_MAX - 1u); + CHECK_DIFFERENCE (UINT_MAX, 1, unsigned int, false, UINT_MAX - 1); + CHECK_DIFFERENCE (0u, -1, unsigned int, false, 0u - -1); + CHECK_DIFFERENCE (UINT_MAX, -1, unsigned int, true, UINT_MAX - -1); + CHECK_DIFFERENCE (INT_MIN, 1u, unsigned int, true, INT_MIN - 1u); + CHECK_DIFFERENCE (-1, 0u, unsigned int, true, -1 - 0u); + CHECK_SDIFFERENCE (-1, INT_MIN, int, false, -1 - INT_MIN); + CHECK_SDIFFERENCE (-1, INT_MAX, int, false, -1 - INT_MAX); + CHECK_SDIFFERENCE (0, INT_MIN, int, INT_MIN < -INT_MAX, INT_MIN); + CHECK_SDIFFERENCE (0, INT_MAX, int, false, 0 - INT_MAX); + CHECK_SDIFFERENCE_WRAPV (-1, 1u, int, false, DONTCARE); + CHECK_SDIFFERENCE_WRAPV (-1, 1ul, int, false, DONTCARE); + CHECK_SDIFFERENCE_WRAPV (-1l, 1u, int, false, DONTCARE); + CHECK_SDIFFERENCE_WRAPV (0u, INT_MAX, int, false, DONTCARE); + CHECK_SDIFFERENCE_WRAPV (1u, INT_MIN, int, true, 1u - INT_MIN); + { + long int result; + ASSERT (INT_SUBTRACT_WRAPV (INT_MAX, -1, &result) == (INT_MAX == LONG_MAX)); + ASSERT (INT_SUBTRACT_WRAPV (INT_MIN, 1, &result) == (INT_MAX == LONG_MAX)); + } + + #define CHECK_PRODUCT(a, b, t, v, vres) \ + CHECK_PRODUCT1 (a, b, t, v, vres); \ + CHECK_PRODUCT1 (b, a, t, v, vres) + #define CHECK_SPRODUCT(a, b, t, v, vres) \ + CHECK_SPRODUCT1 (a, b, t, v, vres); \ + CHECK_SPRODUCT1 (b, a, t, v, vres) + #define CHECK_SPRODUCT_WRAPV(a, b, t, v, vres) \ + CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres); \ + CHECK_SPRODUCT_WRAPV1 (b, a, t, v, vres) + #define CHECK_PRODUCT1(a, b, t, v, vres) \ + VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (v)) + #define CHECK_SPRODUCT1(a, b, t, v, vres) \ + CHECK_PRODUCT1 (a, b, t, v, vres); \ + CHECK_SPRODUCT_WRAPV1 (a, b, t, v, vres) + #define CHECK_SPRODUCT_WRAPV1(a, b, t, v, vres) \ + { \ + t result; \ + ASSERT (INT_MULTIPLY_WRAPV (a, b, &result) == (v)); \ + ASSERT (result == ((v) ? (vres) : ((a) * (b)))); \ + } + CHECK_PRODUCT (-1, 1u, unsigned int, true, -1 * 1u); + CHECK_SPRODUCT (-1, INT_MIN, int, INT_NEGATE_OVERFLOW (INT_MIN), INT_MIN); + CHECK_PRODUCT (-1, UINT_MAX, unsigned int, true, -1 * UINT_MAX); + CHECK_SPRODUCT (-32768, LONG_MAX / -32768 - 1, long int, true, LONG_MIN); + CHECK_SPRODUCT (-12345, LONG_MAX / -12345, long int, false, DONTCARE); + CHECK_SPRODUCT (0, -1, int, false, DONTCARE); + CHECK_SPRODUCT (0, 0, int, false, DONTCARE); + CHECK_PRODUCT (0, 0u, unsigned int, false, DONTCARE); + CHECK_SPRODUCT (0, 1, int, false, DONTCARE); + CHECK_SPRODUCT (0, INT_MAX, int, false, DONTCARE); + CHECK_SPRODUCT (0, INT_MIN, int, false, DONTCARE); + CHECK_PRODUCT (0, UINT_MAX, unsigned int, false, DONTCARE); + CHECK_PRODUCT (0u, -1, unsigned int, false, DONTCARE); + CHECK_PRODUCT (0u, 0, unsigned int, false, DONTCARE); + CHECK_PRODUCT (0u, 0u, unsigned int, false, DONTCARE); + CHECK_PRODUCT (0u, 1, unsigned int, false, DONTCARE); + CHECK_PRODUCT (0u, INT_MAX, unsigned int, false, DONTCARE); + CHECK_PRODUCT (0u, INT_MIN, unsigned int, false, DONTCARE); + CHECK_PRODUCT (0u, UINT_MAX, unsigned int, false, DONTCARE); + CHECK_SPRODUCT (1, INT_MAX, int, false, DONTCARE); + CHECK_SPRODUCT (1, INT_MIN, int, false, DONTCARE); + CHECK_PRODUCT (1, UINT_MAX, unsigned int, false, DONTCARE); + CHECK_PRODUCT (1u, INT_MIN, unsigned int, true, 1u * INT_MIN); + CHECK_PRODUCT (1u, INT_MAX, unsigned int, UINT_MAX < INT_MAX, 1u * INT_MAX); + CHECK_PRODUCT (INT_MAX, UINT_MAX, unsigned int, true, INT_MAX * UINT_MAX); + CHECK_PRODUCT (INT_MAX, ULONG_MAX, unsigned long int, true, + INT_MAX * ULONG_MAX); +#if !defined __HP_cc + CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, long int, true, LONG_MIN); + CHECK_SPRODUCT (INT_MIN, LONG_MAX / INT_MIN, long int, false, DONTCARE); +#endif + CHECK_PRODUCT (INT_MIN, UINT_MAX, unsigned int, true, INT_MIN * UINT_MAX); + CHECK_PRODUCT (INT_MIN, ULONG_MAX, unsigned long int, true, + INT_MIN * ULONG_MAX); + CHECK_SPRODUCT_WRAPV (-1, INT_MAX + 1u, int, false, DONTCARE); + CHECK_SPRODUCT_WRAPV (-1, 1u, int, false, DONTCARE); + CHECK_SPRODUCT (0, ULONG_MAX, int, false, DONTCARE); + CHECK_SPRODUCT (0u, LONG_MIN, int, false, DONTCARE); + { + long int result; + ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result) + == (LONG_MAX / INT_MAX < INT_MAX)); + ASSERT (INT_MULTIPLY_WRAPV (INT_MAX, INT_MAX, &result) + || result == INT_MAX * (long int) INT_MAX); + ASSERT (INT_MULTIPLY_WRAPV (INT_MIN, INT_MIN, &result) + || result == INT_MIN * (long int) INT_MIN); + } + +# ifdef LLONG_MAX + { + long long int result; + ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result) + == (LLONG_MAX / LONG_MAX < LONG_MAX)); + ASSERT (INT_MULTIPLY_WRAPV (LONG_MAX, LONG_MAX, &result) + || result == LONG_MAX * (long long int) LONG_MAX); + ASSERT (INT_MULTIPLY_WRAPV (LONG_MIN, LONG_MIN, &result) + || result == LONG_MIN * (long long int) LONG_MIN); + } +# endif + + /* Check for GCC bug 91450. */ + { + unsigned long long result; + ASSERT (INT_MULTIPLY_WRAPV (int_minus_2, int_1, &result) && result == -2); + } + + #define CHECK_QUOTIENT(a, b, v) VERIFY (INT_DIVIDE_OVERFLOW (a, b) == (v)) + + CHECK_QUOTIENT (INT_MIN, -1L, INT_MIN == LONG_MIN); + CHECK_QUOTIENT (INT_MIN, UINT_MAX, false); + CHECK_QUOTIENT (INTMAX_MIN, UINTMAX_MAX, false); + CHECK_QUOTIENT (INTMAX_MIN, UINT_MAX, false); + CHECK_QUOTIENT (-11, 10u, true); + CHECK_QUOTIENT (-10, 10u, true); + CHECK_QUOTIENT (-9, 10u, false); + CHECK_QUOTIENT (11u, -10, true); + CHECK_QUOTIENT (10u, -10, true); + CHECK_QUOTIENT (9u, -10, false); + + #define CHECK_REMAINDER(a, b, v) VERIFY (INT_REMAINDER_OVERFLOW (a, b) == (v)) + + CHECK_REMAINDER (INT_MIN, -1L, INT_MIN == LONG_MIN); + CHECK_REMAINDER (-1, UINT_MAX, true); + CHECK_REMAINDER ((intmax_t) -1, UINTMAX_MAX, true); + CHECK_REMAINDER (INTMAX_MIN, UINT_MAX, + (INTMAX_MAX < UINT_MAX + && - (unsigned int) INTMAX_MIN % UINT_MAX != 0)); + CHECK_REMAINDER (INT_MIN, ULONG_MAX, INT_MIN % ULONG_MAX != 1); + CHECK_REMAINDER (1u, -1, false); + CHECK_REMAINDER (37*39u, -39, false); + CHECK_REMAINDER (37*39u + 1, -39, true); + CHECK_REMAINDER (37*39u - 1, -39, true); + CHECK_REMAINDER (LONG_MAX, -INT_MAX, false); + + return 0; +} |