From 79620980ea3880f6512a35b9d688a60a02ff8b98 Mon Sep 17 00:00:00 2001
From: Dominick Allen <djallen@librehumanitas.org>
Date: Sat, 5 Oct 2024 08:33:39 -0500
Subject: Formatting changes. Refactoring out detail::CopyMove from Result.

---
 source/fud_assert.cpp | 45 ++++++++++++++++++++++++++++++++++++---------
 1 file changed, 36 insertions(+), 9 deletions(-)

(limited to 'source/fud_assert.cpp')

diff --git a/source/fud_assert.cpp b/source/fud_assert.cpp
index f3358df..9c2ec77 100644
--- a/source/fud_assert.cpp
+++ b/source/fud_assert.cpp
@@ -1,26 +1,53 @@
 #include "fud_assert.hpp"
 
 #include "fud_array.hpp"
+#include "fud_string_view.hpp"
 
+#include <climits>
 #include <cstdio>
-#include <stdexcept>
 #include <format>
+#include <stdexcept>
 
 namespace fud {
 
 void assertFail(const char* assertion, const char* file, unsigned int line, const char* function) noexcept(false)
 {
-    constexpr size_t ASSERT_MSG_SIZE = 1024;
+    constexpr size_t MAX_FILE_CHARS = 256;
+    constexpr size_t MAX_FUNCTION_CHARS = 256;
+    constexpr size_t BITS_PER_OCTAL = 3;
+    constexpr auto MAX_LINE_CHARS = BITS_PER_OCTAL * sizeof(decltype(line)) + 3;
+    constexpr size_t MAX_ASSERT_CHARS = 512 - MAX_LINE_CHARS;
+    constexpr size_t ASSERT_MSG_SIZE = MAX_FILE_CHARS + MAX_LINE_CHARS + MAX_FUNCTION_CHARS + MAX_ASSERT_CHARS;
+
+    auto lengthResult = cStringLength(file);
+    size_t filenameLength = 0;
+    auto badLength = lengthResult < 1 || lengthResult > SSIZE_MAX;
+    if (!badLength) {
+        filenameLength = static_cast<size_t>(lengthResult);
+    }
+    const char* filename = nullptr;
+    if (badLength) {
+        constexpr const char invalidFile[] = "INVALID FILE";
+        static_assert(sizeof(invalidFile) < MAX_FILE_CHARS);
+        filenameLength = sizeof(invalidFile);
+        filename = invalidFile;
+    } else if (filenameLength > MAX_LINE_CHARS) {
+        filename = file + filenameLength - MAX_LINE_CHARS;
+        filenameLength = MAX_FILE_CHARS;
+    }
+
     Array<char, ASSERT_MSG_SIZE> buffer{};
+    // clang-format off
     static_cast<void>(std::format_to_n(
-        buffer.data(),
-        buffer.size() - 1U,
-        "{}:{}: {}:Assertion `{}` failed",
-        file,
+        buffer.data(), buffer.size() - 1U,
+        "{:.{}s}:{}: {:.{}s}: Assertion `{:.{}s}` failed",
+        filename, filenameLength,
         line,
-        function,
-        assertion));
+        function, MAX_FUNCTION_CHARS,
+        assertion, MAX_ASSERT_CHARS));
+    // clang-format on
+
     throw std::runtime_error(buffer.data());
 }
 
-}
+} // namespace fud
-- 
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