Merge pull request #772 from cppalliance/update_fuzz

Update fuzz

Author: mborland

.github/workflows/fuzz.yml

@@ -86,6 +86,26 @@ jobs:
               - "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main"
             source_keys:
               - "https://apt.llvm.org/llvm-snapshot.gpg.key"
+          - toolset: clang
+            compiler: clang++-18
+            cxxstd: "14,17,20,23"
+            os: ubuntu-24.04
+            install:
+              - clang-18
+            sources:
+              - "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-18 main"
+            source_keys:
+              - "https://apt.llvm.org/llvm-snapshot.gpg.key"
+          - toolset: clang
+            compiler: clang++-19
+            cxxstd: "14,17,20,23"
+            os: ubuntu-24.04
+            install:
+              - clang-19
+            sources:
+              - "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-19 main"
+            source_keys:
+              - "https://apt.llvm.org/llvm-snapshot.gpg.key"
 
 
     timeout-minutes: 60

fuzzing/fuzz_from_chars_float.cpp

@@ -26,6 +26,36 @@ extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data, std::size_t size
             boost::decimal::decimal128 ld_val;
             boost::decimal::from_chars(c_data, c_data + size, ld_val, format);
         }
+
+        // Now with strings
+        const auto c_data_str = std::string(c_data, size);
+        for (const auto format : formats)
+        {
+            boost::decimal::decimal32 f_val;
+            boost::decimal::from_chars(c_data_str, f_val, format);
+
+            boost::decimal::decimal64 val;
+            boost::decimal::from_chars(c_data_str, val, format);
+
+            boost::decimal::decimal128 ld_val;
+            boost::decimal::from_chars(c_data_str, ld_val, format);
+        }
+
+        // And string views as applicable
+        #ifdef BOOST_DECIMAL_HAS_STD_STRING_VIEW
+        const auto c_data_str_view = std::string_view(c_data_str);
+        for (const auto format : formats)
+        {
+            boost::decimal::decimal32 f_val;
+            boost::decimal::from_chars(c_data_str_view, f_val, format);
+
+            boost::decimal::decimal64 val;
+            boost::decimal::from_chars(c_data_str_view, val, format);
+
+            boost::decimal::decimal128 ld_val;
+            boost::decimal::from_chars(c_data_str_view, ld_val, format);
+        }
+        #endif
     }
     catch(...)
     {

fuzzing/old_crashes/fuzz_from_chars_float/crash-da39a3ee5e6b4b0d3255bfef95601890afd80709

@@ -325,9 +325,20 @@ void test_string_interface()
     constexpr T correct_val {42};
     std::string str {"42"};
     T val;
-    const auto r = from_chars(str, val);
+    auto r = from_chars(str, val);
     BOOST_TEST(r);
     BOOST_TEST_EQ(val, correct_val);
+
+    // Empty string
+    std::string empty;
+    r = from_chars(empty, val);
+    BOOST_TEST(r.ec == std::errc::invalid_argument);
+
+    #ifdef BOOST_DECIMAL_HAS_STD_STRING_VIEW
+    std::string_view empty_view = std::string_view(empty);
+    r = from_chars(empty_view, val);
+    BOOST_TEST(r.ec == std::errc::invalid_argument);
+    #endif
 }
 
 int main()