diff options
Diffstat (limited to 'deps/icu-small/source/common/putil.cpp')
-rw-r--r-- | deps/icu-small/source/common/putil.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/deps/icu-small/source/common/putil.cpp b/deps/icu-small/source/common/putil.cpp index e367fa6d30..a1e16a9cd9 100644 --- a/deps/icu-small/source/common/putil.cpp +++ b/deps/icu-small/source/common/putil.cpp @@ -533,6 +533,28 @@ uprv_fmin(double x, double y) return (x > y ? y : x); } +U_CAPI UBool U_EXPORT2 +uprv_add32_overflow(int32_t a, int32_t b, int32_t* res) { + // NOTE: Some compilers (GCC, Clang) have primitives available, like __builtin_add_overflow. + // This function could be optimized by calling one of those primitives. + auto a64 = static_cast<int64_t>(a); + auto b64 = static_cast<int64_t>(b); + int64_t res64 = a64 + b64; + *res = static_cast<int32_t>(res64); + return res64 != *res; +} + +U_CAPI UBool U_EXPORT2 +uprv_mul32_overflow(int32_t a, int32_t b, int32_t* res) { + // NOTE: Some compilers (GCC, Clang) have primitives available, like __builtin_mul_overflow. + // This function could be optimized by calling one of those primitives. + auto a64 = static_cast<int64_t>(a); + auto b64 = static_cast<int64_t>(b); + int64_t res64 = a64 * b64; + *res = static_cast<int32_t>(res64); + return res64 != *res; +} + /** * Truncates the given double. * trunc(3.3) = 3.0, trunc (-3.3) = -3.0 |