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81 lines
3.4 KiB
81 lines
3.4 KiB
7 years ago
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Bug: https://bugs.gentoo.org/618100
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Cherry-picked from upstream commits: https://github.com/coreutils/gnulib/commit/175b4e22f99e00996b72f822f5ae54dca8243d19
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https://github.com/coreutils/gnulib/commit/abae112b34572cd3869ce4fc81dddb5c2a7394c4
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--- a/oathtool/gl/intprops.h
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+++ b/oathtool/gl/intprops.h
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@@ -23,6 +23,10 @@
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#include <limits.h>
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#include <verify.h>
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+#ifndef __has_builtin
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+# define __has_builtin(x) 0
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+#endif
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+
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/* Return a value with the common real type of E and V and the value of V. */
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#define _GL_INT_CONVERT(e, v) (0 * (e) + (v))
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@@ -222,20 +226,24 @@
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? (a) < (min) >> (b) \
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: (max) >> (b) < (a))
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-/* True if __builtin_add_overflow (A, B, P) works when P is null. */
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-#define _GL_HAS_BUILTIN_OVERFLOW_WITH_NULL (7 <= __GNUC__)
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+/* True if __builtin_add_overflow (A, B, P) works when P is non-null. */
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+#define _GL_HAS_BUILTIN_OVERFLOW \
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+ (5 <= __GNUC__ || __has_builtin (__builtin_add_overflow))
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+
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+#define _GL_HAS_BUILTIN_OVERFLOW_P \
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+ (7 <= __GNUC__ || __has_builtin (__builtin_add_overflow_p))
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/* The _GL*_OVERFLOW macros have the same restrictions as the
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*_RANGE_OVERFLOW macros, except that they do not assume that operands
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(e.g., A and B) have the same type as MIN and MAX. Instead, they assume
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that the result (e.g., A + B) has that type. */
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-#if _GL_HAS_BUILTIN_OVERFLOW_WITH_NULL
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-# define _GL_ADD_OVERFLOW(a, b, min, max)
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- __builtin_add_overflow (a, b, (__typeof__ ((a) + (b)) *) 0)
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-# define _GL_SUBTRACT_OVERFLOW(a, b, min, max)
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- __builtin_sub_overflow (a, b, (__typeof__ ((a) - (b)) *) 0)
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-# define _GL_MULTIPLY_OVERFLOW(a, b, min, max)
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- __builtin_mul_overflow (a, b, (__typeof__ ((a) * (b)) *) 0)
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+#if _GL_HAS_BUILTIN_OVERFLOW_P
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+# define _GL_ADD_OVERFLOW(a, b, min, max) \
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+ __builtin_add_overflow_p (a, b, (a) + (b))
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+# define _GL_SUBTRACT_OVERFLOW(a, b, min, max) \
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+ __builtin_sub_overflow_p (a, b, (a) - (b))
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+# define _GL_MULTIPLY_OVERFLOW(a, b, min, max) \
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+ __builtin_mul_overflow_p (a, b, (a) * (b))
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#else
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# define _GL_ADD_OVERFLOW(a, b, min, max) \
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((min) < 0 ? INT_ADD_RANGE_OVERFLOW (a, b, min, max) \
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@@ -315,7 +323,7 @@
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_GL_BINARY_OP_OVERFLOW (a, b, _GL_ADD_OVERFLOW)
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#define INT_SUBTRACT_OVERFLOW(a, b) \
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_GL_BINARY_OP_OVERFLOW (a, b, _GL_SUBTRACT_OVERFLOW)
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-#if _GL_HAS_BUILTIN_OVERFLOW_WITH_NULL
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+#if _GL_HAS_BUILTIN_OVERFLOW || _GL_HAS_BUILTIN_OVERFLOW_P
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# define INT_NEGATE_OVERFLOW(a) INT_SUBTRACT_OVERFLOW (0, a)
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#else
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# define INT_NEGATE_OVERFLOW(a) \
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@@ -349,10 +357,6 @@
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#define INT_MULTIPLY_WRAPV(a, b, r) \
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_GL_INT_OP_WRAPV (a, b, r, *, __builtin_mul_overflow, INT_MULTIPLY_OVERFLOW)
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-#ifndef __has_builtin
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-# define __has_builtin(x) 0
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-#endif
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-
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/* Nonzero if this compiler has GCC bug 68193 or Clang bug 25390. See:
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68193
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https://llvm.org/bugs/show_bug.cgi?id=25390
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@@ -369,7 +373,7 @@
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the operation. BUILTIN is the builtin operation, and OVERFLOW the
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overflow predicate. Return 1 if the result overflows. See above
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for restrictions. */
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-#if 5 <= __GNUC__ || __has_builtin (__builtin_add_overflow)
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+#if _GL_HAS_BUILTIN_OVERFLOW
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# define _GL_INT_OP_WRAPV(a, b, r, op, builtin, overflow) builtin (a, b, r)
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#elif 201112 <= __STDC_VERSION__ && !_GL__GENERIC_BOGUS
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# define _GL_INT_OP_WRAPV(a, b, r, op, builtin, overflow) \
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