From 3bf42c6ff3805a0d42bbc661794a95ff31bedc26 Mon Sep 17 00:00:00 2001
From: untodesu <kirill@untode.su>
Date: Sat, 15 Mar 2025 16:22:09 +0500
Subject: Add whatever I was working on for the last month

---
 deps/include/spdlog/sinks/rotating_file_sink-inl.h | 144 +++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 deps/include/spdlog/sinks/rotating_file_sink-inl.h

(limited to 'deps/include/spdlog/sinks/rotating_file_sink-inl.h')

diff --git a/deps/include/spdlog/sinks/rotating_file_sink-inl.h b/deps/include/spdlog/sinks/rotating_file_sink-inl.h
new file mode 100644
index 0000000..6119be6
--- /dev/null
+++ b/deps/include/spdlog/sinks/rotating_file_sink-inl.h
@@ -0,0 +1,144 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+#ifndef SPDLOG_HEADER_ONLY
+    #include <spdlog/sinks/rotating_file_sink.h>
+#endif
+
+#include <spdlog/common.h>
+
+#include <spdlog/details/file_helper.h>
+#include <spdlog/details/null_mutex.h>
+#include <spdlog/fmt/fmt.h>
+
+#include <cerrno>
+#include <chrono>
+#include <ctime>
+#include <mutex>
+#include <string>
+#include <tuple>
+
+namespace spdlog {
+namespace sinks {
+
+template <typename Mutex>
+SPDLOG_INLINE rotating_file_sink<Mutex>::rotating_file_sink(
+    filename_t base_filename,
+    std::size_t max_size,
+    std::size_t max_files,
+    bool rotate_on_open,
+    const file_event_handlers &event_handlers)
+    : base_filename_(std::move(base_filename)),
+      max_size_(max_size),
+      max_files_(max_files),
+      file_helper_{event_handlers} {
+    if (max_size == 0) {
+        throw_spdlog_ex("rotating sink constructor: max_size arg cannot be zero");
+    }
+
+    if (max_files > 200000) {
+        throw_spdlog_ex("rotating sink constructor: max_files arg cannot exceed 200000");
+    }
+    file_helper_.open(calc_filename(base_filename_, 0));
+    current_size_ = file_helper_.size();  // expensive. called only once
+    if (rotate_on_open && current_size_ > 0) {
+        rotate_();
+        current_size_ = 0;
+    }
+}
+
+// calc filename according to index and file extension if exists.
+// e.g. calc_filename("logs/mylog.txt, 3) => "logs/mylog.3.txt".
+template <typename Mutex>
+SPDLOG_INLINE filename_t rotating_file_sink<Mutex>::calc_filename(const filename_t &filename,
+                                                                  std::size_t index) {
+    if (index == 0u) {
+        return filename;
+    }
+
+    filename_t basename, ext;
+    std::tie(basename, ext) = details::file_helper::split_by_extension(filename);
+    return fmt_lib::format(SPDLOG_FMT_STRING(SPDLOG_FILENAME_T("{}.{}{}")), basename, index, ext);
+}
+
+template <typename Mutex>
+SPDLOG_INLINE filename_t rotating_file_sink<Mutex>::filename() {
+    std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
+    return file_helper_.filename();
+}
+
+template <typename Mutex>
+SPDLOG_INLINE void rotating_file_sink<Mutex>::sink_it_(const details::log_msg &msg) {
+    memory_buf_t formatted;
+    base_sink<Mutex>::formatter_->format(msg, formatted);
+    auto new_size = current_size_ + formatted.size();
+
+    // rotate if the new estimated file size exceeds max size.
+    // rotate only if the real size > 0 to better deal with full disk (see issue #2261).
+    // we only check the real size when new_size > max_size_ because it is relatively expensive.
+    if (new_size > max_size_) {
+        file_helper_.flush();
+        if (file_helper_.size() > 0) {
+            rotate_();
+            new_size = formatted.size();
+        }
+    }
+    file_helper_.write(formatted);
+    current_size_ = new_size;
+}
+
+template <typename Mutex>
+SPDLOG_INLINE void rotating_file_sink<Mutex>::flush_() {
+    file_helper_.flush();
+}
+
+// Rotate files:
+// log.txt -> log.1.txt
+// log.1.txt -> log.2.txt
+// log.2.txt -> log.3.txt
+// log.3.txt -> delete
+template <typename Mutex>
+SPDLOG_INLINE void rotating_file_sink<Mutex>::rotate_() {
+    using details::os::filename_to_str;
+    using details::os::path_exists;
+
+    file_helper_.close();
+    for (auto i = max_files_; i > 0; --i) {
+        filename_t src = calc_filename(base_filename_, i - 1);
+        if (!path_exists(src)) {
+            continue;
+        }
+        filename_t target = calc_filename(base_filename_, i);
+
+        if (!rename_file_(src, target)) {
+            // if failed try again after a small delay.
+            // this is a workaround to a windows issue, where very high rotation
+            // rates can cause the rename to fail with permission denied (because of antivirus?).
+            details::os::sleep_for_millis(100);
+            if (!rename_file_(src, target)) {
+                file_helper_.reopen(
+                    true);  // truncate the log file anyway to prevent it to grow beyond its limit!
+                current_size_ = 0;
+                throw_spdlog_ex("rotating_file_sink: failed renaming " + filename_to_str(src) +
+                                    " to " + filename_to_str(target),
+                                errno);
+            }
+        }
+    }
+    file_helper_.reopen(true);
+}
+
+// delete the target if exists, and rename the src file  to target
+// return true on success, false otherwise.
+template <typename Mutex>
+SPDLOG_INLINE bool rotating_file_sink<Mutex>::rename_file_(const filename_t &src_filename,
+                                                           const filename_t &target_filename) {
+    // try to delete the target file in case it already exists.
+    (void)details::os::remove(target_filename);
+    return details::os::rename(src_filename, target_filename) == 0;
+}
+
+}  // namespace sinks
+}  // namespace spdlog
-- 
cgit