From f884b6d2083815d227839c566dab17020b9b3644 Mon Sep 17 00:00:00 2001
From: Vinicius Rangel <me@viniciusrangel.dev>
Date: Mon, 4 Nov 2024 02:30:21 -0300
Subject: [PATCH] IOFile: removes seek limit checks when file is writable

---
 src/common/io_file.cpp | 22 ++++++++++++----------
 src/common/io_file.h   |  2 ++
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/src/common/io_file.cpp b/src/common/io_file.cpp
index dd3a40cae..067010a26 100644
--- a/src/common/io_file.cpp
+++ b/src/common/io_file.cpp
@@ -377,16 +377,18 @@ bool IOFile::Seek(s64 offset, SeekOrigin origin) const {
         return false;
     }
 
-    u64 size = GetSize();
-    if (origin == SeekOrigin::CurrentPosition && Tell() + offset > size) {
-        LOG_ERROR(Common_Filesystem, "Seeking past the end of the file");
-        return false;
-    } else if (origin == SeekOrigin::SetOrigin && (u64)offset > size) {
-        LOG_ERROR(Common_Filesystem, "Seeking past the end of the file");
-        return false;
-    } else if (origin == SeekOrigin::End && offset > 0) {
-        LOG_ERROR(Common_Filesystem, "Seeking past the end of the file");
-        return false;
+    if (False(file_access_mode & (FileAccessMode::Write | FileAccessMode::Append))) {
+        u64 size = GetSize();
+        if (origin == SeekOrigin::CurrentPosition && Tell() + offset > size) {
+            LOG_ERROR(Common_Filesystem, "Seeking past the end of the file");
+            return false;
+        } else if (origin == SeekOrigin::SetOrigin && (u64)offset > size) {
+            LOG_ERROR(Common_Filesystem, "Seeking past the end of the file");
+            return false;
+        } else if (origin == SeekOrigin::End && offset > 0) {
+            LOG_ERROR(Common_Filesystem, "Seeking past the end of the file");
+            return false;
+        }
     }
 
     errno = 0;
diff --git a/src/common/io_file.h b/src/common/io_file.h
index 8fed4981f..feb2110ac 100644
--- a/src/common/io_file.h
+++ b/src/common/io_file.h
@@ -10,6 +10,7 @@
 
 #include "common/concepts.h"
 #include "common/types.h"
+#include "enum.h"
 
 namespace Common::FS {
 
@@ -42,6 +43,7 @@ enum class FileAccessMode {
      */
     ReadAppend = Read | Append,
 };
+DECLARE_ENUM_FLAG_OPERATORS(FileAccessMode);
 
 enum class FileType {
     BinaryFile,