From aa20220627631b58fba7512cfed3483f9925261e Mon Sep 17 00:00:00 2001
From: Francisco Javier Trujillo Mata <fjtrujy@gmail.com>
Date: Tue, 30 Mar 2021 16:20:36 +0200
Subject: [PATCH] HostFS: Implement opendir and closedir

---
 pcsx2/IopBios.cpp | 79 +++++++++++++++++++++++++++++++++++++++++++++++
 pcsx2/IopBios.h   |  7 ++++-
 2 files changed, 85 insertions(+), 1 deletion(-)

diff --git a/pcsx2/IopBios.cpp b/pcsx2/IopBios.cpp
index 2645a23877..6f8bfb6f72 100644
--- a/pcsx2/IopBios.cpp
+++ b/pcsx2/IopBios.cpp
@@ -235,6 +235,42 @@ public:
 	}
 };
 
+class HostDir : public IOManDir
+{
+public:
+    DIR *dir;
+    
+    HostDir(DIR *native_dir)
+    {
+        dir = native_dir;
+    }
+    
+    virtual ~HostDir() = default;
+
+    static int open(IOManDir **dir, const std::string &full_path)
+    {
+        struct stat stats;
+        const std::string path = host_path(full_path.substr(full_path.find(':') + 1));
+        
+        if(!(::stat(path.c_str(), &stats) && S_ISDIR(stats.st_mode)))
+        {
+            *dir = new HostDir(::opendir(path.c_str()));
+            if (!*dir)
+                return -IOP_ENOMEM;
+
+            return 0;
+        } else
+            return -IOP_ENOMEM;
+    }
+    
+    virtual void close()
+    {
+        ::closedir(dir);
+        delete this;
+    }
+    
+};
+
 namespace ioman {
 	const int firstfd = 0x100;
 	const int maxfds = 0x100;
@@ -397,6 +433,47 @@ namespace ioman {
 		return 0;
 	}
 
+    int dopen_HLE()
+    {
+        IOManDir *dir = NULL;
+        const std::string path = Ra0;
+
+        int err = HostDir::open(&dir, path);
+
+        if (err != 0 || !dir)
+        {
+            if (err == 0)
+                err = -IOP_EIO;
+            if (dir)
+                dir->close();
+            v0 = err;
+        }
+        else
+        {
+            v0 = allocfd(dir);
+            if ((s32)v0 < 0)
+                dir->close();
+        }
+
+        pc = ra;
+        return 1;
+    }
+
+    int dclose_HLE()
+    {
+        s32 dir = a0;
+
+        if (getfd<IOManDir>(dir))
+        {
+            freefd(dir);
+            v0 = 0;
+            pc = ra;
+            return 1;
+        }
+
+        return 0;
+    }
+
 	int lseek_HLE()
 	{
 		s32 fd = a0;
@@ -708,6 +785,8 @@ irxHLE irxImportHLE(const std::string &libname, u16 index)
 		EXPORT_H(  8, lseek)
 		EXPORT_H( 11, mkdir)
 		EXPORT_H( 12, rmdir)
+		EXPORT_H( 13, dopen)
+		EXPORT_H( 14, dclose)
 	END_MODULE
 
 	return 0;
diff --git a/pcsx2/IopBios.h b/pcsx2/IopBios.h
index 2168062ce6..0bf0dea6d8 100644
--- a/pcsx2/IopBios.h
+++ b/pcsx2/IopBios.h
@@ -55,7 +55,12 @@ class IOManDir {
 	// Don't think about it until we know the loaded ioman version.
 	// The dirent structure changed between versions.
 public:
-	virtual void close();
+    static int open(IOManDir **dir, const std::string &full_path)
+    {
+        return -IOP_ENODEV;
+    }
+    
+	virtual void close() = 0;
 };
 
 typedef int (*irxHLE)(); // return 1 if handled, otherwise 0