Lots of work.

1 files changed, 55 insertions, 0 deletions

diff --git a/include/fud_c_string.hpp b/include/fud_c_string.hpp
new file mode 100644
index 0000000..44e0dc8
--- /dev/null
+++ b/include/fud_c_string.hpp
@@ -0,0 +1,55 @@
+/*
+ * libfud
+ * Copyright 2024 Dominick Allen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FUD_C_STRING_HPP
+#define FUD_C_STRING_HPP
+
+#include <climits>
+#include <cstddef>
+#include <sys/types.h>
+
+
+namespace fud {
+
+constexpr ssize_t cStringLength(const char* str, size_t maxLength)
+{
+    if (str == nullptr || maxLength > (SSIZE_MAX - 1)) {
+        return -1;
+    }
+
+    ssize_t size = 0;
+
+    while (str[size] != 0 && static_cast<size_t>(size) < maxLength) {
+        size++;
+    }
+
+    if (str[size] != 0 && static_cast<size_t>(size) == maxLength) {
+        return static_cast<ssize_t>(maxLength) + 1;
+    }
+
+    return size;
+}
+
+constexpr ssize_t cStringLength(const char* str)
+{
+    constexpr auto maxLength = SSIZE_MAX - 1;
+    return cStringLength(str, maxLength);
+}
+
+} // namespace fud
+
+#endif