From a1c54beffed03bfd1f52e4834db3810faed5c06d Mon Sep 17 00:00:00 2001
From: lifegpc <root@lifegpc.com>
Date: Tue, 23 Dec 2025 10:52:20 +0800
Subject: [PATCH] Fix fopen on windows share files with read and share
 permissions.

---
 stream.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/stream.h b/stream.h
index 38022bb..622b180 100644
--- a/stream.h
+++ b/stream.h
@@ -6,6 +6,18 @@
 #include <vector>
 #include <string.h>
 #include "cstr_util.h"
+#if _WIN32
+#include <fcntl.h>
+#ifndef _SH_DENYWR
+#define _SH_DENYWR 0x20
+#endif
+#ifndef _O_BINARY
+#define _O_BINARY 0x8000
+#endif
+#ifndef _O_RDONLY
+#define _O_RDONLY 0x0000
+#endif
+#endif
 
 class ReadStream {
 public:
@@ -93,10 +105,24 @@ public:
      * @param filename File name (on Windows, UTF-8 encoding is supported)
     */
     FileReadStream(const char* filename) {
+#if _WIN32
+        int fd = 0;
+        int re = fileop::open(filename, fd, _O_RDONLY | _O_BINARY, _SH_DENYWR);
+        if (re != 0) {
+            errored = true;
+            return;
+        }
+        fp = fileop::fdopen(fd, "rb");
+        if (!fp) {
+            errored = true;
+            fileop::close(fd);
+        }
+#else
         fp = fileop::fopen(filename, "rb");
         if (!fp) {
             errored = true;
         }
+#endif
     }
     virtual size_t read(uint8_t* buf, size_t size) {
         if (!fp) return 0;