From 55d00feb3c9b253153391e8ec35d893f56e89c7d Mon Sep 17 00:00:00 2001
From: lifegpc <root@lifegpc.com>
Date: Wed, 19 Mar 2025 09:01:14 +0800
Subject: [PATCH] Add fopen to utils

---
 fileop.cpp | 21 +++++++++++++++++++++
 fileop.h   |  1 +
 2 files changed, 22 insertions(+)

diff --git a/fileop.cpp b/fileop.cpp
index e503901..ab2f910 100644
--- a/fileop.cpp
+++ b/fileop.cpp
@@ -45,6 +45,10 @@ bool exists_internal(wchar_t* fn) {
     return !_waccess(fn, 0);
 }
 
+FILE* fopen_internal(wchar_t* fn, const wchar_t* mode) {
+    return _wfopen(fn, mode);
+}
+
 bool remove_internal(wchar_t* fn, bool print_error) {
     int ret = _wremove(fn);
     if (ret && print_error && errno != ENOENT) {
@@ -667,3 +671,20 @@ std::string fileop::relpath(std::string path, std::string start) {
 
     return result;
 }
+
+FILE* fileop::fopen(std::string path, std::string mode) {
+#if _WIN32
+    std::wstring wMode;
+    if (wchar_util::str_to_wstr(wMode, mode, CP_UTF8)) {
+        UINT cp[] = { CP_UTF8, CP_OEMCP, CP_ACP };
+        int i;
+        for (i = 0; i < 3; i++) {
+            auto f = fileop_internal<FILE*>(path.c_str(), cp[i], &fopen_internal, nullptr, wMode.c_str());
+            if (f) return f;
+        }
+    }
+    return ::fopen(path.c_str(), mode.c_str());
+#else
+    return ::fopen(path.c_str(), mode.c_str());
+#endif
+}
diff --git a/fileop.h b/fileop.h
index 4996e68..81686aa 100644
--- a/fileop.h
+++ b/fileop.h
@@ -182,5 +182,6 @@ namespace fileop {
      * @return Result
      */
     std::string relpath(std::string path, std::string start = "");
+    FILE* fopen(std::string path, std::string mode);
 }
 #endif