Merge pull request #217 from Arkshine/feature/valve-fs-support

Add support for Valve FS to natives that use file handles

amxmodx/AMBuilder

@@ -93,6 +93,7 @@ binary.sources = [
   'cvars.cpp',
   '../public/memtools/CDetour/detours.cpp',
   '../public/memtools/CDetour/asm/asm.c',
+  'CLibrarySys.cpp',
 ]
 
 if builder.target_platform == 'windows':

amxmodx/CFileSystem.h

@@ -0,0 +1,256 @@
+// vim: set ts=4 sw=4 tw=99 noet:
+//
+// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
+// Copyright (C) The AMX Mod X Development Team.
+//
+// This software is licensed under the GNU General Public License, version 3 or higher.
+// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
+//     https://alliedmods.net/amxmodx-license
+
+#ifndef _INCLUDE_CFILESYSTEM_H_
+#define _INCLUDE_CFILESYSTEM_H_
+
+#include <FileSystem.h> // IFileSystem, FileSystemSeek_t, FileHandle_t (HLSDK)
+#include <stdio.h>      // FILE*
+#include <am-cxx.h>     // KE_OVERRIDE
+
+extern IFileSystem* g_FileSystem;
+
+class ValveFile;
+class SystemFile;
+
+class FileObject
+{
+	public:
+
+		virtual ~FileObject() {};
+
+		virtual size_t Read(void* pOut, size_t size) = 0;
+		virtual char* ReadLine(char* pOut, size_t size) = 0;
+		virtual size_t Write(const void* pData, size_t size) = 0;
+
+		virtual bool Seek(int pos, int seek_type) = 0;
+		virtual int Tell() = 0;
+		virtual int Flush() = 0;
+
+		virtual bool HasError() = 0;
+
+		virtual bool EndOfFile() = 0;
+		virtual void Close() = 0;
+
+		virtual ValveFile *AsValveFile() 
+		{
+			return nullptr;
+		}
+
+		virtual SystemFile *AsSystemFile()
+		{
+			return nullptr;
+		}
+};
+
+class ValveFile : public FileObject
+{
+	public:
+
+		ValveFile(FileHandle_t handle) : handle_(handle) {}
+
+		~ValveFile() 
+		{
+			Close();
+		}
+
+		static bool Exists(const char* file)
+		{
+			return g_FileSystem->FileExists(file);
+		}
+
+		static ValveFile* Open(const char* filename, const char* mode, const char* pathID) 
+		{
+			FileHandle_t handle = g_FileSystem->OpenFromCacheForRead(filename, mode, pathID);
+			
+			if (!handle)
+			{
+				return nullptr;
+			}
+
+			return new ValveFile(handle);
+		}
+
+		static bool Delete(const char* filename, const char* pathID) 
+		{
+			if (!Exists(filename))
+			{
+				return false;
+			}
+
+			g_FileSystem->RemoveFile(filename, pathID);
+
+			if (Exists(filename))
+			{
+				return false;
+			}
+
+			return true;
+		}
+
+		size_t Read(void* pOut, size_t size) KE_OVERRIDE
+		{
+			return static_cast<size_t>(g_FileSystem->Read(pOut, size, handle_));
+		}
+		
+		char* ReadLine(char* pOut, size_t size) KE_OVERRIDE
+		{
+			return g_FileSystem->ReadLine(pOut, size, handle_);
+		}
+
+		size_t Write(const void* pData, size_t size) KE_OVERRIDE
+		{
+			return static_cast<size_t>(g_FileSystem->Write(pData, size, handle_));
+		}
+		
+		bool Seek(int pos, int seek_type) KE_OVERRIDE
+		{
+			g_FileSystem->Seek(handle_, pos, static_cast<FileSystemSeek_t>(seek_type));
+			return !HasError();
+		}
+		
+		int Tell() KE_OVERRIDE
+		{
+			return g_FileSystem->Tell(handle_);
+		}
+		
+		bool HasError() KE_OVERRIDE
+		{
+			return !handle_ || !g_FileSystem->IsOk(handle_);
+		}
+		
+		int Flush() KE_OVERRIDE
+		{
+			g_FileSystem->Flush(handle_);
+			return 0;
+		}
+		
+		bool EndOfFile() KE_OVERRIDE 
+		{
+			return g_FileSystem->EndOfFile(handle_);
+		}
+	
+		void Close() KE_OVERRIDE 
+		{
+			if (handle_)
+			{
+				g_FileSystem->Close(handle_);
+				handle_ = nullptr;;
+			}
+		}
+		
+		virtual ValveFile* AsValveFile() 
+		{
+			return this;
+		}
+
+		FileHandle_t handle() const
+		{
+			return handle_;
+		}
+
+	private:
+
+		FileHandle_t handle_;
+};
+
+
+class SystemFile : public FileObject
+{
+	public:
+
+		SystemFile(FILE* fp) : fp_(fp) {}
+
+		~SystemFile() 
+		{
+			Close();
+		}
+
+		static SystemFile* Open(const char* path, const char* mode) 
+		{
+			FILE* fp = fopen(path, mode);
+
+			if (!fp)
+			{
+				return nullptr;
+			}
+
+			return new SystemFile(fp);
+		}
+
+		static bool Delete(const char* path) 
+		{
+			return unlink(path) == 0;
+		}
+
+		size_t Read(void* pOut, size_t size) KE_OVERRIDE 
+		{
+			return fread(pOut, 1, size, fp_);
+		}
+		
+		char* ReadLine(char* pOut, size_t size) KE_OVERRIDE
+		{
+			return fgets(pOut, size, fp_);
+		}
+		
+		size_t Write(const void* pData, size_t size) KE_OVERRIDE 
+		{
+			return fwrite(pData, 1, size, fp_);
+		}
+		
+		bool Seek(int pos, int seek_type) KE_OVERRIDE 
+		{
+			return fseek(fp_, pos, seek_type) == 0;
+		}
+		
+		int Tell() KE_OVERRIDE 
+		{
+			return ftell(fp_);
+		}
+		
+		bool HasError() KE_OVERRIDE 
+		{
+			return ferror(fp_) != 0;
+		}
+		
+		int Flush() KE_OVERRIDE 
+		{
+			return fflush(fp_);
+		}
+		
+		bool EndOfFile() KE_OVERRIDE
+		{
+			return feof(fp_) != 0;
+		}
+		
+		void Close() KE_OVERRIDE 
+		{
+			if (fp_)
+			{
+				fclose(fp_);
+				fp_ = nullptr;
+			}
+		}
+		
+		virtual SystemFile* AsSystemFile()
+		{
+			return this;
+		}
+
+		FILE* handle() const
+		{
+			return fp_;
+		}
+
+	private:
+
+		FILE* fp_;
+};
+
+#endif // _INCLUDE_CFILESYSTEM_H_

amxmodx/CLang.cpp

@@ -12,6 +12,8 @@
 #include "CLang.h"
 #include "format.h"
 
+CVector<FILE *> FileList;
+
 #define LITIDX_NONE			0
 #define LITIDX_BRACKET		1
 #define LITIDX_DEFINITION	2

amxmodx/CLibrarySys.cpp

@@ -0,0 +1,532 @@
+// vim: set ts=4 sw=4 tw=99 noet:
+//
+// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
+// Copyright (C) The AMX Mod X Development Team.
+//
+// This software is licensed under the GNU General Public License, version 3 or higher.
+// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
+//     https://alliedmods.net/amxmodx-license
+
+#include "CLibrarySys.h"
+#include <amxmodx.h>
+
+LibrarySystem g_LibSys;
+
+/******************/
+/* Directory Code */
+/******************/
+
+CDirectory::CDirectory(const char *path)
+{
+#if defined PLATFORM_WINDOWS
+
+	char newpath[PLATFORM_MAX_PATH];
+	UTIL_Format(newpath, sizeof(newpath) - 1, "%s\\*.*", path);
+
+	m_dir = FindFirstFile(newpath, &m_fd);
+
+	if (!IsValid())
+	{
+		m_fd.cFileName[0] = '\0';
+	}
+
+#elif defined PLATFORM_POSIX
+
+	m_dir = opendir(path);
+
+	if (IsValid())
+	{
+		m_ep = readdir(m_dir); // TODO: we need to read past "." and ".."!
+		UTIL_Format(m_origpath, sizeof(m_origpath) - 1, "%s", path);
+	}
+	else
+	{
+		m_ep = nullptr;
+	}
+#endif
+}
+
+CDirectory::~CDirectory()
+{
+	if (IsValid())
+	{
+#if defined PLATFORM_WINDOWS
+
+		FindClose(m_dir);
+
+#elif defined PLATFORM_POSIX
+
+		closedir(m_dir);
+#endif
+	}
+}
+
+DirHandle CDirectory::GetHandle()
+{
+	return m_dir;
+}
+
+void CDirectory::NextEntry()
+{
+#if defined PLATFORM_WINDOWS
+
+	if (FindNextFile(m_dir, &m_fd) == 0)
+	{
+		FindClose(m_dir);
+		m_dir = INVALID_HANDLE_VALUE;
+	}
+
+#elif defined PLATFORM_POSIX
+
+	if (!(m_ep = readdir(m_dir)))
+	{
+		closedir(m_dir);
+		m_dir = nullptr;
+	}
+#endif
+}
+
+bool CDirectory::IsEntryValid()
+{
+	return IsValid();
+}
+
+bool CDirectory::IsEntryDirectory()
+{
+#if defined PLATFORM_WINDOWS
+
+	return ((m_fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY);
+
+#elif defined PLATFORM_POSIX
+
+	char temppath[PLATFORM_MAX_PATH];
+	UTIL_Format(temppath, sizeof(temppath) - 1, "%s/%s", m_origpath, GetEntryName());
+
+	return g_LibSys.IsPathDirectory(temppath);
+
+#endif
+}
+
+bool CDirectory::IsEntryFile()
+{
+#if defined PLATFORM_WINDOWS
+
+	return !(m_fd.dwFileAttributes & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE));
+
+#elif defined PLATFORM_POSIX
+
+	char temppath[PLATFORM_MAX_PATH];
+	UTIL_Format(temppath, sizeof(temppath) - 1, "%s/%s", m_origpath, GetEntryName());
+
+	return g_LibSys.IsPathFile(temppath);
+
+#endif
+}
+
+const char* CDirectory::GetEntryName()
+{
+#if defined PLATFORM_WINDOWS
+
+	return m_fd.cFileName;
+
+#elif defined PLATFORM_POSIX
+
+	return m_ep ? m_ep->d_name : "";
+
+#endif
+}
+
+bool CDirectory::MoreFiles()
+{
+	return IsValid();
+}
+
+bool CDirectory::IsValid()
+{
+#if defined PLATFORM_WINDOWS
+
+	return (m_dir != INVALID_HANDLE_VALUE);
+
+#elif defined PLATFORM_POSIX
+
+	return (m_dir != nullptr);
+#endif
+}
+
+
+/****************/
+/* Library Code */
+/****************/
+
+CLibrary::~CLibrary()
+{
+	if (m_lib)
+	{
+#if defined PLATFORM_WINDOWS
+
+		FreeLibrary(m_lib);
+
+#elif defined PLATFORM_POSIX
+
+		dlclose(m_lib);
+#endif
+		m_lib = nullptr;
+	}
+}
+
+CLibrary::CLibrary(LibraryHandle me)
+{
+	m_lib = me;
+}
+
+void CLibrary::CloseLibrary()
+{
+	delete this;
+}
+
+void *CLibrary::GetSymbolAddress(const char* symname)
+{
+#if defined PLATFORM_WINDOWS
+
+	return GetProcAddress(m_lib, symname);
+
+#elif defined PLATFORM_POSIX
+
+	return dlsym(m_lib, symname);
+#endif
+}
+
+
+/***********************/
+/* Library System Code */
+/***********************/
+
+bool LibrarySystem::PathExists(const char *path)
+{
+#if defined PLATFORM_WINDOWS
+
+	DWORD attr = GetFileAttributesA(path);
+
+	return (attr != INVALID_FILE_ATTRIBUTES);
+
+#elif defined PLATFORM_POSIX
+
+	struct stat s;
+
+	return (stat(path, &s) == 0);
+#endif
+}
+
+bool LibrarySystem::IsPathFile(const char* path)
+{
+#if defined PLATFORM_WINDOWS
+
+	DWORD attr = GetFileAttributes(path);
+
+	if (attr == INVALID_FILE_ATTRIBUTES)
+	{
+		return false;
+	}
+
+	if (attr & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_DEVICE))
+	{
+		return false;
+	}
+
+	return true;
+
+#elif defined PLATFORM_POSIX
+
+	struct stat s;
+
+	if (stat(path, &s) != 0)
+	{
+		return false;
+	}
+
+	return S_ISREG(s.st_mode) ? true : false;
+#endif
+}
+
+bool LibrarySystem::IsPathDirectory(const char* path)
+{
+#if defined PLATFORM_WINDOWS
+
+	DWORD attr = GetFileAttributes(path);
+
+	if (attr == INVALID_FILE_ATTRIBUTES)
+	{
+		return false;
+	}
+
+	if (attr & FILE_ATTRIBUTE_DIRECTORY)
+	{
+		return true;
+	}
+
+#elif defined PLATFORM_POSIX
+
+	struct stat s;
+
+	if (stat(path, &s) != 0)
+	{
+		return false;
+	}
+
+	if (S_ISDIR(s.st_mode))
+	{
+		return true;
+	}
+#endif
+
+	return false;
+}
+
+CDirectory *LibrarySystem::OpenDirectory(const char* path)
+{
+	CDirectory* dir = new CDirectory(path);
+
+	if (!dir->IsValid())
+	{
+		delete dir;
+		return nullptr;
+	}
+
+	return dir;
+}
+
+CLibrary* LibrarySystem::OpenLibrary(const char* path, char* error, size_t maxlength)
+{
+#if defined PLATFORM_WINDOWS
+
+	LibraryHandle lib = LoadLibrary(path);
+
+#elif defined PLATFORM_POSIX
+
+	LibraryHandle lib = dlopen(path, RTLD_NOW);
+#endif
+
+	if (!lib)
+	{
+		if (error && maxlength)
+		{
+			GetLoaderError(error, maxlength);
+		}
+
+		return nullptr;
+	}
+
+	return new CLibrary(lib);
+}
+
+void LibrarySystem::GetPlatformError(char* error, size_t maxlength)
+{
+#if defined PLATFORM_WINDOWS
+
+	return GetPlatformErrorEx(GetLastError(), error, maxlength);
+
+#elif defined PLATFORM_POSIX
+
+	return GetPlatformErrorEx(errno, error, maxlength);
+#endif
+}
+
+void LibrarySystem::GetPlatformErrorEx(int code, char* error, size_t maxlength)
+{
+	if (error && maxlength)
+	{
+#if defined PLATFORM_WINDOWS
+
+		if (FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+			nullptr,
+			(DWORD)code,
+			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+			(LPSTR)error,
+			maxlength,
+			nullptr) == 0)
+		{
+			UTIL_Format(error, maxlength, "error code %08x", code);
+		}
+
+#elif defined PLATFORM_LINUX
+
+		const char *ae = strerror_r(code, error, maxlength);
+
+		if (ae != error)
+		{
+			UTIL_Format(error, maxlength, "%s", ae);
+		}
+
+#elif defined PLATFORM_POSIX
+
+		strerror_r(code, error, maxlength);
+#endif
+	}
+}
+
+void LibrarySystem::GetLoaderError(char* buffer, size_t maxlength)
+{
+#if defined PLATFORM_WINDOWS
+
+	GetPlatformError(buffer, maxlength);
+
+#elif defined PLATFORM_POSIX
+
+	if (buffer && maxlength)
+	{
+		strncopy(buffer, dlerror(), maxlength);
+	}
+#endif
+}
+
+void LibrarySystem::CloseDirectory(CDirectory *dir)
+{
+	delete dir;
+}
+
+size_t LibrarySystem::PathFormat(char* buffer, size_t len, const char* fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	size_t mylen = vsnprintf(buffer, len, fmt, ap);
+	va_end(ap);
+
+	if (mylen >= len)
+	{
+		mylen = len - 1;
+		buffer[mylen] = '\0';
+	}
+
+	for (size_t i = 0; i < mylen; i++)
+	{
+		if (buffer[i] == PLATFORM_SEP_ALTCHAR)
+		{
+			buffer[i] = PLATFORM_SEP_CHAR;
+		}
+	}
+
+	return mylen;
+}
+
+char* LibrarySystem::PathFormat(const char* fmt, ...)
+{
+	static char buffer[PLATFORM_MAX_PATH];
+
+	va_list ap;
+	va_start(ap, fmt);
+	size_t mylen = vsnprintf(buffer, sizeof(buffer), fmt, ap);
+	va_end(ap);
+
+	if (mylen >= sizeof(buffer))
+	{
+		mylen = sizeof(buffer) - 1;
+		buffer[mylen] = '\0';
+	}
+
+	for (size_t i = 0; i < mylen; i++)
+	{
+		if (buffer[i] == PLATFORM_SEP_ALTCHAR)
+		{
+			buffer[i] = PLATFORM_SEP_CHAR;
+		}
+	}
+
+	return buffer;
+}
+
+const char* LibrarySystem::GetFileExtension(const char* filename)
+{
+	size_t len, end;
+
+	len = strlen(filename);
+
+	/* Minimum string length for filename with ext would be 3; example: a.a */
+	if (len < 3)
+	{
+		return nullptr;
+	}
+
+	end = len - 1;
+
+	for (size_t i = end; i <= end; i--)
+	{
+		if (filename[i] == PLATFORM_SEP_CHAR || filename[i] == PLATFORM_SEP_ALTCHAR)
+		{
+			break;
+		}
+
+		if (filename[i] == '.' && i != end && i != 0)
+		{
+			return &filename[++i];
+		}
+	}
+
+	return nullptr;
+}
+
+bool LibrarySystem::CreateFolder(const char* path)
+{
+#if defined PLATFORM_WINDOWS
+
+	return (mkdir(path) != -1);
+
+#elif defined PLATFORM_POSIX
+
+	return (mkdir(path, 0775) != -1);
+#endif
+}
+
+size_t LibrarySystem::GetFileFromPath(char* buffer, size_t maxlength, const char* path)
+{
+	size_t length = strlen(path);
+
+	for (size_t i = length - 1; i <= length - 1; i--)
+	{
+		if (path[i] == '/'
+#if defined PLATFORM_WINDOWS
+			|| path[i] == '\\'
+#endif
+			)
+		{
+			return UTIL_Format(buffer, maxlength, "%s", &path[i + 1]);
+		}
+	}
+
+	/* We scanned and found no path separator */
+	return UTIL_Format(buffer, maxlength, "%s", path);
+}
+
+bool LibrarySystem::FileTime(const char* path, FileTimeType type, time_t* pTime)
+{
+	struct stat s;
+
+	if (stat(path, &s) != 0)
+	{
+		return false;
+	}
+
+	switch (type)
+	{
+		case FileTime_LastAccess:
+		{
+			*pTime = s.st_atime;
+			break;
+		}
+		case FileTime_Created:
+		{
+			*pTime = s.st_ctime;
+			break;
+		}
+		case FileTime_LastChange:
+		{
+			*pTime = s.st_mtime;
+			break;
+		}
+		default:
+		{
+			return false;
+		}
+	}
+
+	return true;
+}

amxmodx/CLibrarySys.h

@@ -0,0 +1,182 @@
+// vim: set ts=4 sw=4 tw=99 noet:
+//
+// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
+// Copyright (C) The AMX Mod X Development Team.
+//
+// This software is licensed under the GNU General Public License, version 3 or higher.
+// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
+//     https://alliedmods.net/amxmodx-license
+
+#ifndef _INCLUDE_LIBRARY_SYS_H_
+#define _INCLUDE_LIBRARY_SYS_H_
+
+#include "amx.h"        // cell
+#include <interface.h>  // Interface (HLSDK)
+#include <am-utility.h> // AutoPtr
+
+#if defined(WIN32)
+#  ifndef PLATFORM_WINDOWS
+#  define PLATFORM_WINDOWS  1
+#  endif
+#  ifndef WIN32_LEAN_AND_MEAN
+#  define WIN32_LEAN_AND_MEAN
+#  endif
+#  include <windows.h>
+#  include <direct.h>
+#  include <io.h>
+#  define PLATFORM_LIB_EXT      "dll"
+#  define PLATFORM_SEP_CHAR     '\\'
+#  define PLATFORM_SEP_ALTCHAR  '/'
+#  define PLATFORM_EXTERN_C     extern "C" __declspec(dllexport)
+#elif defined(__linux__) || defined(__APPLE__)
+#  if defined(__linux__)
+#    define PLATFORM_LINUX      1
+#    define PLATFORM_LIB_EXT    "so"
+#  elif defined(__APPLE__)
+#    define PLATFORM_APPLE      1
+#    define PLATFORM_LIB_EXT    "dylib"
+#  endif
+#  ifndef PLATFORM_POSIX
+#    define PLATFORM_POSIX      1
+#  endif
+#  include <stdio.h>
+#  include <sys/types.h>
+#  include <sys/stat.h>
+#  include <errno.h>
+#  include <unistd.h>
+#  include <dirent.h>
+#  include <dlfcn.h>
+#  if defined(PLATFORM_APPLE)
+#    include <sys/syslimits.h>
+#  endif
+#  define PLATFORM_SEP_CHAR     '/'
+#  define PLATFORM_SEP_ALTCHAR  '\\'
+#  define PLATFORM_EXTERN_C     extern "C" __attribute__((visibility("default")))
+#  define WINAPI
+#endif
+
+#define PLATFORM_MAX_PATH 260
+
+#if defined PLATFORM_WINDOWS
+
+	typedef HMODULE  LibraryHandle;
+	typedef HANDLE   DirHandle;
+
+#elif defined PLATFORM_POSIX
+
+	typedef void*    LibraryHandle;
+	typedef DIR*     DirHandle;
+
+#endif
+
+enum FileTimeType
+{
+	FileTime_LastAccess = 0,  /* Last access (not available on FAT) */
+	FileTime_Created    = 1,  /* Creation (not available on FAT) */
+	FileTime_LastChange = 2,  /* Last modification */
+};
+
+class CDirectory
+{
+	public:
+
+		CDirectory(const char* path);
+		~CDirectory();
+
+	public:
+
+		bool MoreFiles();
+		void NextEntry();
+		const char* GetEntryName();
+		bool IsEntryDirectory();
+		bool IsEntryFile();
+		bool IsEntryValid();
+
+	public:
+
+		bool IsValid();
+		DirHandle GetHandle();
+
+	private:
+
+#if defined PLATFORM_WINDOWS
+
+		HANDLE           m_dir;
+		WIN32_FIND_DATAA m_fd;
+
+#elif defined PLATFORM_POSIX
+
+		DIR*             m_dir;
+		struct dirent*   m_ep;
+		char             m_origpath[PLATFORM_MAX_PATH];
+#endif
+};
+
+class CLibrary
+{
+	public:
+
+		CLibrary(LibraryHandle me);
+		~CLibrary();
+
+	public:
+
+		void CloseLibrary();
+		void *GetSymbolAddress(const char* symname);
+
+	private:
+
+		LibraryHandle m_lib;
+};
+
+class LibrarySystem
+{
+	public:
+
+		CLibrary* OpenLibrary(const char* path, char* error = nullptr, size_t maxlength = 0);
+		CDirectory* OpenDirectory(const char* path);
+		void CloseDirectory(CDirectory *dir);
+
+		bool PathExists(const char* path);
+		bool IsPathFile(const char* path);
+		bool IsPathDirectory(const char* path);
+
+		void GetPlatformError(char* error, size_t maxlength);
+		void GetPlatformErrorEx(int code, char* error, size_t maxlength);
+
+		size_t PathFormat(char* buffer, size_t len, const char* fmt, ...);
+		char*  PathFormat(const char* fmt, ...);
+
+		const char* GetFileExtension(const char* filename);
+		bool CreateFolder(const char* path);
+		size_t GetFileFromPath(char* buffer, size_t maxlength, const char* path);
+
+		bool FileTime(const char* path, FileTimeType type, time_t* pTime);
+		void GetLoaderError(char* buffer, size_t maxlength);
+};
+
+extern LibrarySystem g_LibSys;
+
+template <typename T>
+bool GET_IFACE(const char* library, T*& var, const char* version)
+{
+	const char* path = g_LibSys.PathFormat("%s.%s", library, PLATFORM_LIB_EXT);
+
+	ke::AutoPtr<CLibrary> lib(g_LibSys.OpenLibrary(path));
+
+	if (lib)
+	{
+		CreateInterfaceFn factory = reinterpret_cast<CreateInterfaceFn>(lib->GetSymbolAddress(CREATEINTERFACE_PROCNAME));
+
+		if (factory)
+		{
+			var = reinterpret_cast<T*>(factory(version, nullptr));
+			return true;
+		}
+	}
+
+	var = nullptr;
+	return false;
+}
+
+#endif // _INCLUDE_LIBRARY_SYS_H_

amxmodx/CPlugin.cpp

@@ -152,6 +152,11 @@ int CPluginMngr::loadPluginsFromFile(const char* filename, bool warn)
 			{
 				*get_amxaddr(plugin->getAMX(), addr) = gpGlobals->maxClients;
 			}
+
+			if (amx_FindPubVar(plugin->getAMX(), "NULL_STRING", &addr) != AMX_ERR_NOTFOUND)
+			{
+				plugin->m_pNullStringOfs = get_amxaddr(plugin->getAMX(), addr);
+			}
 		}
 	}
 
@@ -256,7 +261,7 @@ const char* CPluginMngr::CPlugin::getStatus() const
 	return "error";
 }
 
-CPluginMngr::CPlugin::CPlugin(int i, const char* p, const char* n, char* e, int d) : name(n), title(n)
+CPluginMngr::CPlugin::CPlugin(int i, const char* p, const char* n, char* e, int d) : name(n), title(n), m_pNullStringOfs(nullptr)
 {
 	const char* unk = "unknown";
 	

amxmodx/CPlugin.h

@@ -61,6 +61,7 @@ public:
 		~CPlugin();
 		
 		bool m_Debug;
+		cell* m_pNullStringOfs;
 	public:
 		inline const char* getName() { return name.c_str();}
 		inline const char* getVersion() { return version.c_str();}
@@ -90,6 +91,7 @@ public:
 		
 		const char* getStatus() const;
 		inline bool isDebug() const { return m_Debug; }
+		inline cell* getNullStringOfs() const { return m_pNullStringOfs; }
 	}; 
 	
 private:	

amxmodx/amxmodx.cpp

@@ -29,7 +29,7 @@ static cell AMX_NATIVE_CALL get_xvar_id(AMX *amx, cell *params)
 	char* sName = get_amxstring(amx, params[1], 0, len);
 	cell ptr;
 
-	if (!strcmp(sName, "MaxClients"))
+	if (!strcmp(sName, "MaxClients") || !strcmp(sName, "NULL_STRING"))
 	{
 		return -1;
 	}
@@ -3784,19 +3784,6 @@ cell AMX_NATIVE_CALL require_module(AMX *amx, cell *params)
 	return 1;
 }
 
-static cell AMX_NATIVE_CALL amx_mkdir(AMX *amx, cell *params)
-{
-	int len = 0;
-	char *path = get_amxstring(amx, params[1], 0, len);
-	char *realpath = build_pathname("%s", path);
-
-#if defined(__linux__) || defined(__APPLE__)
-	return mkdir(realpath, 0700);
-#else
-	return mkdir(realpath);
-#endif
-}
-
 static cell AMX_NATIVE_CALL find_plugin_byfile(AMX *amx, cell *params)
 {
 	typedef int (*STRCOMPARE)(const char*, const char*);
@@ -4561,7 +4548,6 @@ AMX_NATIVE_INFO amxmodx_Natives[] =
 	{"hash_string",				amx_hash_string},
 	{"hash_file",				amx_hash_file},
 	{"module_exists",			module_exists},
-	{"mkdir",					amx_mkdir},
 	{"next_hudchannel",			next_hudchannel},
 	{"num_to_word",				num_to_word},
 	{"parse_loguser",			parse_loguser},

amxmodx/amxmodx.h

@@ -276,6 +276,7 @@ char* format_amxstring(AMX *amx, cell *params, int parm, int& len);
 AMX* get_amxscript(int, void**, const char**);
 const char* get_amxscriptname(AMX* amx);
 char* get_amxstring(AMX *amx, cell amx_addr, int id, int& len);
+char *get_amxstring_null(AMX *amx, cell amx_addr, int id, int& len);
 extern "C" size_t get_amxstring_r(AMX *amx, cell amx_addr, char *destination, int maxlen);
 
 int amxstring_len(cell* cstr);

amxmodx/meta_api.cpp

@@ -8,13 +8,6 @@
 //     https://alliedmods.net/amxmodx-license
 
 #include <time.h>
-
-#if defined WIN32
-#include <direct.h>
-#else
-#include <dirent.h>
-#endif
-
 #include "amxmodx.h"
 #include "fakemeta.h"
 #include "CMenu.h"
@@ -32,6 +25,8 @@
 #include "CDataPack.h"
 #include "textparse.h"
 #include "CvarManager.h"
+#include "CLibrarySys.h"
+#include "CFileSystem.h"
 
 plugin_info_t Plugin_info = 
 {
@@ -143,6 +138,8 @@ int FF_InconsistentFile = -1;
 int FF_ClientAuthorized = -1;
 int FF_ChangeLevel = -1;
 
+IFileSystem* g_FileSystem;
+
 bool ColoredMenus(String & ModName)
 {
 	const char * pModNames[] = { "cstrike", "czero", "dmc", "dod", "tfc", "valve" };
@@ -1493,7 +1490,9 @@ C_DLLEXPORT	int	Meta_Attach(PLUG_LOADTIME now, META_FUNCTIONS *pFunctionTable, m
 	FlagMan.SetFile("cmdaccess.ini");
 
 	g_CvarManager.CreateCvarHook();
-	
+
+	GET_IFACE<IFileSystem>("filesystem_stdio", g_FileSystem, FILESYSTEM_INTERFACE_VERSION);
+
 	return (TRUE);
 }
 

amxmodx/modules.cpp

@@ -43,30 +43,6 @@ ModuleCallReason g_ModuleCallReason;
 
 extern const char* no_function;				// stupid work around
 
-bool DirExists(const char *dir)
-{
-#if defined WIN32 || defined _WIN32
-	DWORD attr = GetFileAttributes(dir);
-	
-	if (attr == INVALID_FILE_ATTRIBUTES)
-		return false;
-	
-	if (attr & FILE_ATTRIBUTE_DIRECTORY)
-		return true;
-	
-#else
-	struct stat s;
-	
-	if (stat(dir, &s) != 0)
-		return false;
-	
-	if (S_ISDIR(s.st_mode))
-		return true;
-#endif
-
-	return false;
-}
-
 void report_error(int code, const char* fmt, ...)
 {
 	va_list argptr;

amxmodx/modules.h

@@ -57,7 +57,6 @@ class Debugger;
 Debugger *DisableDebugHandler(AMX *amx);
 void EnableDebugHandler(AMX *amx, Debugger *pd);
 
-bool DirExists(const char *dir);
 const char* GetFileName(AMX *amx);
 
 inline cell FloatToCell(float input)

amxmodx/msvc12/amxmodx_mm.vcxproj

@@ -256,6 +256,7 @@
     <ClCompile Include="..\CFlagManager.cpp" />
     <ClCompile Include="..\CForward.cpp" />
     <ClCompile Include="..\CLang.cpp" />
+    <ClCompile Include="..\CLibrarySys.cpp" />
     <ClCompile Include="..\CLogEvent.cpp" />
     <ClCompile Include="..\CMenu.cpp" />
     <ClCompile Include="..\CMisc.cpp" />
@@ -334,9 +335,11 @@
     <ClInclude Include="..\CDataPack.h" />
     <ClInclude Include="..\CEvent.h" />
     <ClInclude Include="..\CFile.h" />
+    <ClInclude Include="..\CFileSystem.h" />
     <ClInclude Include="..\CFlagManager.h" />
     <ClInclude Include="..\CForward.h" />
     <ClInclude Include="..\CLang.h" />
+    <ClInclude Include="..\CLibrarySys.h" />
     <ClInclude Include="..\CList.h" />
     <ClInclude Include="..\CLogEvent.h" />
     <ClInclude Include="..\CMenu.h" />

amxmodx/msvc12/amxmodx_mm.vcxproj.filters

@@ -277,6 +277,9 @@
       <Filter>Third Party\Hashing\hashers</Filter>
     </ClCompile>
     <ClCompile Include="..\CPlugin.cpp">
+    	<Filter>Source Files</Filter>
+	</ClCompile>
+    <ClCompile Include="..\CLibrarySys.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
   </ItemGroup>
@@ -475,6 +478,12 @@
     </ClInclude>
     <ClInclude Include="..\..\third_party\hashing\hashers\sha256.h">
       <Filter>Third Party\Hashing\hashers</Filter>
+	</ClInclude>
+    <ClInclude Include="..\CFileSystem.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\CLibrarySys.h">
+      <Filter>Header Files</Filter>
     </ClInclude>
   </ItemGroup>
   <ItemGroup>

amxmodx/string.cpp

@@ -176,6 +176,16 @@ char *get_amxstring(AMX *amx, cell amx_addr, int id, int& len)
 	return buffer[id];
 }
 
+char *get_amxstring_null(AMX *amx, cell amx_addr, int id, int& len)
+{
+	if (get_amxaddr(amx, amx_addr) == g_plugins.findPluginFast(amx)->getNullStringOfs())
+	{
+		return nullptr;
+	}
+
+	return get_amxstring(amx, amx_addr, id, len);
+}
+
 void copy_amxmemory(cell* dest, cell* src, int len)
 {
 	while (len--)

compiler/libpc300/sc1.c

@@ -1895,8 +1895,10 @@ static void declglb(char *firstname,int firsttag,int fpublic,int fstatic,int fst
         if (size > INT_MAX)
           error(105);                   /* overflow, exceeding capacity */
       #endif
+#if 0	/* We don't actually care */
       if (ispublic)
         error(56,name);                 /* arrays cannot be public */
+#endif
       dim[numdim++]=(int)size;
     } /* while */
     /* if this variable is never used (which can be detected only in the
@@ -1936,7 +1938,7 @@ static void declglb(char *firstname,int firsttag,int fpublic,int fstatic,int fst
       sym->usage|=uDEFINE;
     } /* if */
     if (ispublic)
-      sym->usage|=uPUBLIC;
+      sym->usage|=uPUBLIC|uREAD;
     if (fconst)
       sym->usage|=uCONST;
     if (fstock)

compiler/libpc300/sc6.c

@@ -619,7 +619,7 @@ SC_FUNC int assemble(FILE *fout,FILE *fin)
         assert(sym->vclass==sGLOBAL);
         mainaddr=sym->addr;
       } /* if */
-    } else if (sym->ident==iVARIABLE) {
+    } else if (sym->ident==iVARIABLE || sym->ident == iARRAY || sym->ident == iREFARRAY) {
       if ((sym->usage & uPUBLIC)!=0 && (sym->usage & (uREAD | uWRITTEN))!=0)
         match=++numpubvars;
     } /* if */
@@ -794,7 +794,8 @@ SC_FUNC int assemble(FILE *fout,FILE *fin)
   /* write the public variables table */
   count=0;
   for (sym=glbtab.next; sym!=NULL; sym=sym->next) {
-    if (sym->ident==iVARIABLE && (sym->usage & uPUBLIC)!=0 && (sym->usage & (uREAD | uWRITTEN))!=0) {
+    if ((sym->ident==iVARIABLE || sym->ident==iARRAY || sym->ident==iREFARRAY) 
+        && (sym->usage & uPUBLIC)!=0 && (sym->usage & (uREAD | uWRITTEN))!=0) {
       assert((sym->usage & uDEFINE)!=0);
       assert(sym->vclass==sGLOBAL);
       func.address=sym->addr;

plugins/include/amxconst.inc

@@ -39,7 +39,15 @@
  */
 #define MAX_PLAYERS 32 /* Maximum number of players AMX Mod X supports */
 
-public stock const MaxClients; /* Maximum number of players the server supports */
+/**
+ * Maximum number of players the server supports 
+ */
+public stock const MaxClients; 
+
+/**
+ * Pass this into certain functions to act as a C++ NULL 
+ */
+public stock const NULL_STRING[1];
 
 /**
  * The maximum buffer size required to store a clients name.

plugins/include/file.inc

@@ -12,140 +12,36 @@
 //
 
 #if defined _file_included
-  #endinput
+	#endinput
 #endif
 #define _file_included
 
-/* Reads content from directory.
-* Returns index of next element or 0 when end of dir. is reached. */
-native read_dir(const dirname[],pos,output[],len,&outlen);
-
-/* Reads line from file. Returns index of next line or 0 when end of file is reached. */
-native read_file(const file[],line,text[],len,&txtlen);
-
-/* Writes text to file. Function returns 0 on failure.
-* When line is set to -1, the text is added at the end of file. */
-native write_file(const file[],const text[],line = -1);
-
-/* Deletes file. Function returns 1 on success, 0 on failure. */
-native delete_file(const file[]);
-
-/* Checks for file. If file exists function returns 1, in other case 0. */
-native file_exists(const file[]);
-
-/* renames a file.  returns 0 on failure, 1 on success.
- * if relative true, rename_file will act like other natives which 
- * use the moddir as a base directory.  otherwise, the current directory is 
- * undefined (but assumed to be hlds).
+/**
+ * @note All paths in AMX Mod X natives are relative to the mod folder
+ * unless otherwise noted.
+ *
+ * Most functions in AMX Mod X (at least, ones that deal with direct 
+ * file manipulation) will support an alternate path specification.
  */
-native rename_file(const oldname[], const newname[], relative=0);
-
-/* Checks if a directory exists */
-native dir_exists(const dir[]);
-
-/* Returns a file size in bytes if flag is set to 0.
-* When flag is set to 1 returns number of lines in the file,
-* and when flags is 2, function returns 1 if the file ends
-* with line feed. If file doesn't exist returns -1. */
-native file_size(const file[], flag=0);
-
-#define SEEK_SET 0
-#define SEEK_CUR 1
-#define SEEK_END 2
-
-//Open a file, returns a handle or 0 on failure
-native fopen(const filename[],const mode[]);
-
-//Closes a file handle
-native fclose(file);
-
-#define BLOCK_INT	4
-#define BLOCK_SHORT	2
-#define BLOCK_CHAR	1
-#define BLOCK_BYTE	1
-
-//The following functions work as such:
-// RAW - means the array you pass is a raw bytestream, for experts only
-// BLOCK - means you are passing in an array where each element will be written
-// NORMAL - means you are writing only one element
-// RAW and BLOCK return the number of blocks acted upon successfully
-// NORMAL returns 1 on success
-
-native fread(file, &data, mode);
-native fread_blocks(file, data[], blocks, mode);
-native fread_raw(file, stream[], blocksize, blocks);
-native fwrite(file, data, mode);
-native fwrite_blocks(file, const data[], blocks, mode);
-native fwrite_raw(file, const stream[], blocksize, mode);
-
-//Returns 1 if the file is ended, 0 otherwise
-native feof(file);
-
-//Reads a line from a text file -- includes newline!
-native fgets(file, buffer[], maxlength);
-
-//Writes a line to a text file.  Returns # of characters written.
-native fputs(file, const text[]);
-
-//Writes a line to the file
-native fprintf(file, const fmt[], any:...);
-
-//Sets the current position in a file (see SEEK_ values above)
-native fseek(file, position, start);
-
-//Returns the current position in a file
-native ftell(file);
-
-//These are straight from the C standard.
-native fgetc(file);
-native fputc(file, data);
-native fungetc(file, data);
-
-//Return the size of a file
-native filesize(const filename[], any:...);
-
-//Attempts to remove a directory.
-//Note that you cannot remove a directory that has files on most
-// operating systems.
-native rmdir(const path[]);
-
-/* Returns 0 on success, like the POSIX specification */
-native mkdir(const dirname[]);
-
-
-//Delete a file (delete_file macro)
-native unlink(const filename[]);
-
-//Returns a handle to a directory
-native open_dir(dir[], firstfile[], length);
-native next_file(dirh, buffer[], length);
-native close_dir(dirh);
+ 
+/**
+ * Maximum path length.
+ */
+#define PLATFORM_MAX_PATH  256
 
 /**
- * Loads a file using the LoadFileForMe engine function.
- *
- * The data is truncated if there is not enough space.  No null-terminator 
- * is applied; the data is the raw contents of the file.
- *
- * @param file			File to load (may be a file from the GCF).
- * @param buffer		Buffer to store file contents.
- * @param maxlength		Maximum size of the file buffer.
- * @param length		Variable to store the file length.  This may return 
- *						a number larger than the buffer size.
- * @return				-1 if the file could not be loaded.  Otherwise, 
- *						the number of cells actually written to the buffer 
- *						are returned.
+ * File inode types for use with open_dir() and next_file().
  */
-native LoadFileForMe(const file[], buffer[], maxlength, &length=0);
+enum FileType
+{
+	FileType_Unknown,       /* Unknown file type (device/socket) */
+	FileType_Directory,     /* File is a directory */
+	FileType_File,          /* File is a file */
+};
 
 /**
- * Flushes a buffered output stream.
- *
- * @param file			File handle, or 0 for all open streams.
- * @return				0 on success, -1 on failure.
+ * File time modes for use with GetFileTime().
  */
-native fflush(file);
-
 enum FileTimeType
 {
 	FileTime_LastAccess,    /* Last access (not available on FAT) */
@@ -153,11 +49,618 @@ enum FileTimeType
 	FileTime_LastChange,    /* Last modification */
 };
 
+/**
+ * File position modes for use with fseek().
+ */
+#define SEEK_SET 0          /* Seek from start */
+#define SEEK_CUR 1          /* Seek from current position */
+#define SEEK_END 2          /* Seek from end position */
+
+/**
+ * Options for use with file_size() flag parameter.
+ */
+#define FSOPT_BYTES_COUNT  0  /* Returns the file size in number of bytes */
+#define FSOPT_LINES_COUNT  1  /* Returns how many lines there are in this file */
+#define FSOPT_END_WITH_LF  2  /* Returns whether the last line is '\n' */
+
+/**
+ * Data block modes for use with fread*() and fwrite*().
+ */
+#define BLOCK_INT   4
+#define BLOCK_SHORT 2
+#define BLOCK_CHAR  1
+#define BLOCK_BYTE  1
+
+/**
+ * File permissions flags for use with mkdir() and SetFilePermissions().
+ */
+#define FPERM_U_READ       0x0100   /* User can read.    */
+#define FPERM_U_WRITE      0x0080   /* User can write.   */
+#define FPERM_U_EXEC       0x0040   /* User can exec.    */
+#define FPERM_U_RWX        FPERM_U_READ | FPERM_U_WRITE | FPERM_U_EXEC
+
+#define FPERM_G_READ       0x0020   /* Group can read.   */
+#define FPERM_G_WRITE      0x0010   /* Group can write.  */
+#define FPERM_G_EXEC       0x0008   /* Group can exec.   */
+#define FPERM_G_RWX        FPERM_G_READ | FPERM_G_WRITE | FPERM_G_EXEC
+
+#define FPERM_O_READ       0x0004   /* Anyone can read.  */
+#define FPERM_O_WRITE      0x0002   /* Anyone can write. */
+#define FPERM_O_EXEC       0x0001   /* Anyone can exec.  */
+#define FPERM_O_RWX        FPERM_O_READ | FPERM_O_WRITE | FPERM_O_EXEC
+
+#define FPERM_DIR_DEFAULT  FPERM_U_RWX | FPERM_G_RWX | FPERM_O_RWX /* rwx r-x r-x (0755) */
+
+
+/**
+ * Reads content from directory
+ *
+ * @note This native is expensive. Consider the use of open_dir(), next_file() and close_dir() instead.
+ * @note Both the '.' and '..' automatic directory entries will be retrieved for Windows and Linux.
+ *
+ * @param dirname      Path to open
+ * @param pos          Index the element
+ * @param output       String buffer to hold content
+ * @param len          Maximum size of string buffer
+ * @param outlen       Number of characters written to the buffer
+ *
+ * @return             Returns index of next element, otherwiwe 0 when end of dir is reached
+ */
+native read_dir(const dirname[], pos, output[], len, &outlen = 0);
+
+/**
+ * Reads line from file.
+ *
+ * @note This native is expensive. Consider the use of new file natives (fopen(), fgets(), etc.)
+ *       if purpose is to read several lines of a file.
+ *
+ * @param file         Path to open
+ * @param line         Index of the line, starting to 0
+ * @param text         String buffer to hold line read
+ * @param len          Maximum size of string buffer
+ * @param txtlen       Number of characters written to the buffer
+ *
+ * @return             Returns index of next line, otherwise 0 when end of file is reached
+ * @error              Unable to read the file
+ */
+native read_file(const file[], line, text[], len, &txtlen = 0);
+
+/**
+ * Writes text to file.
+ *
+ * @note This native is expensive. Consider the use of new file natives (fopen(), fputs(), etc.)
+ *       if purpose is to write several lines of a file.
+ *
+ * @param file         Path to open
+ * @param text         String to write to
+ * @param line         Index of the line, starting to 0
+ *                     If < 0, content will be appended
+ *
+ * @noreturn
+ * @error              Unable to write [temporary] file
+ */
+native write_file(const file[], const text[], line = -1);
+
+/**
+ * Deletes a file.
+ *
+ * @param file          Path of the file to delete
+ * @param use_valve_fs  If true, the Valve file system will be used instead.
+ *                      This can be used to delete files existing in the Valve
+ *                      search path, rather than solely files existing directly
+ *                      in the gamedir.
+ * @param valve_path_id If use_valve_fs, a search path from gameinfo or NULL_STRING for all search paths.
+ *
+ * @return              1 on success, 0 on failure or if file not immediately removed.
+ */
+native delete_file(const file[], bool:use_valve_fs = false, const valve_path_id[] = "GAMECONFIG");
+
+/**
+ * Checks if a file exists.
+ *
+ * @param file          Path to the file
+ * @param use_valve_fs  If true, the Valve file system will be used instead.
+ *                      This can be used to find files existing in any of
+ *                      the Valve search paths, rather than solely files
+ *                      existing directly in the gamedir.
+ *
+ * @return              1 if the file exists, 0 otherwise
+ */
+native file_exists(const file[], bool:use_valve_fs = false);
+
+ /**
+  * Renames a file.
+  *
+  * @param oldname      New path to the file
+  * @param newname      Path to the existing file
+  * @param relative     If true, native  will act like other natives which
+  *                     use the moddir as a base directory. Otherwise, the
+  *                     current directory is undefined (but assumed to be hlds).
+  *
+  * @return             1 on success, 0 otherwise
+  */
+native rename_file(const oldname[], const newname[], relative = 0);
+
+/**
+ * Checks if a directory exists.
+ *
+ * @param dir           Path to the directory
+ * @param use_valve_fs  If true, the Valve file system will be used instead.
+ *                      This can be used to find files existing in any of
+ *                      the Valve search paths, rather than solely files
+ *                      existing directly in the gamedir.
+ *
+ * @return              1 if the directory exists, 0 otherwise
+ */
+native dir_exists(const dir[], bool:use_valve_fs = false);
+
+/**
+ * Get the file size in bytes.
+ *
+ * @param file          Path to the file
+ * @param flag          Flag options, see FSOPT_* constants
+ * @param use_valve_fs  If true, the Valve file system will be used instead.
+ *                      This can be used to find files existing in any of
+ *                      the Valve search paths, rather than solely files
+ *                      existing directly in the gamedir.
+ *                      If used, flag option is ignored.
+ * @param valve_path_id If use_valve_fs, a search path from gameinfo or NULL_STRING for all search paths
+ *
+ * @return              If flag is FSOPT_BYTES_COUNT or use_valve_fs to true, the file size in bytes
+ *                      If flag is FSOPT_LINES_COUNT, the number of lines in the file
+ *                      If flag is FSOPT_END_WITH_LF, 1 is returned if file ends with line feed
+ *                      If file doesn't exist, -1
+ */
+native file_size(const file[], flag = FSOPT_BYTES_COUNT, bool:use_valve_fs = false, const valve_path_id[] = "GAME");
+
+/**
+ * Opens or creates a file, returning a file handle on success. File handles
+ * should be closed with fclose().
+ *
+ * @note The open mode may be one of the following strings:
+ *         "r": Open an existing file for reading.
+ *         "w": Create a file for writing, or truncate (delete the contents of) an
+ *              existing file and then open it for writing.
+ *         "a": Create a file for writing, or open an existing file such that writes
+ *              will be appended to the end.
+ *        "r+": Open an existing file for both reading and writing.
+ *        "w+": Create a file for reading and writing, or truncate an existing file
+ *              and then open it for reading and writing.
+ *        "a+": Create a file for both reading and writing, or open an existing file
+ *              such that writes will be appended to the end.
+ *
+ * @note The open mode may also contain an additional character after "r", "w", or "a",
+ *       but before any "+" sign. This character may be "b" (indicating binary mode) or
+ *       "t" (indicating text mode). By default, "text" mode is implied. On Linux and
+ *       Mac, this has no distinction from binary mode. On Windows, it causes the '\n'
+ *       character (0xA) to be written as "\r\n" (0xD, 0xA).
+ *
+ *       Example: "rb" opens a binary file for writing; "at" opens a text file for
+ *       appending.
+ *
+ * @note Registered paths ID are (in priority order) :
+ *         GAME           All paths related to current mod, including fallback
+ *                        Depending settings, it includes: <gamedir>_lv/_addon/_<language>/_hd
+ *                        and <gamedir> itself
+ *         GAMECONFIG     The default writable directory (<gamedir>)
+ *         GAMEDOWNLOAD   The download directory (<gamedir>_download)
+ *         GAME_FALLBACK  All paths related to fallback game, same as GAME
+ *         DEFAULTGAME    All paths related to the default game which is "valve", same as GAME
+ *         BASE           The base path where server is installed
+ *
+ *         Note that some paths are non-writable. It includes all <gamedir>_* (expect _download)
+ *         and DEFAULTGAME. Any file inside a non-writable path will be ignored if you try to open
+ *         it in writing mode.
+ *
+ * @param filename      File to open
+ * @param mode          Open mode
+ * @param use_valve_fs  If true, the Valve file system will be used instead
+ *                      This can be used to finred files existing in valve
+ *                      search paths, rather than solely files existing directly
+ *                      in the gamedir.
+ * @param valve_path_id If use_valve_fs, a search path from gameinfo or NULL_STRING for all search paths
+ *
+ * @return              A file handle, or null if the file could not be opened.
+ */
+native fopen(const filename[], const mode[], bool:use_valve_fs = false, const valve_path_id[] = "GAME");
+
+/**
+ * Closes a file handle.
+ *
+ * @param file          File handle
+ */
+native fclose(file);
+
+/**
+ * Reads a single binary data from a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Variable to store item read
+ * @param mode          Size of each element, in bytes, to be read
+ *                      See BLOCK_* constants
+ *
+ * @return              Number of elements read
+ */
+native fread(file, &any:data, mode);
+
+/**
+ * Reads binary data from a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Array to store each item read
+ * @param blocks        Number of items to read into the array
+ * @param mode          Size of each element, in bytes, to be read
+ *                      Valid sizes are 1, 2, or 4. See BLOCK_* constants.
+ *
+ * @return              Number of elements read
+ */
+native fread_blocks(file, any:data[], blocks, mode);
+
+/**
+ * Reads raw binary data from a file.
+ *
+ * @param file          Handle to the file
+ * @param stream        Array to store each item read
+ * @param blocksize     Number of items to read into the array
+ * @param blocks        Size of each element, in bytes. The data is read directly.
+ *                      That is, in 1 or 2-byte mode, the lower byte(s) in
+ *                      each cell are used directly, rather than performing
+ *                      any casts from a 4-byte number to a smaller number.
+ *
+ * @return              Number of elements read
+ */
+native fread_raw(file, any:stream[], blocksize, blocks);
+
+/**
+ * Writes a single binary data to a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Item to write
+ * @param mode          Size of each item in the array in bytes
+ *                      Valid sizes are 1, 2, or 4. See BLOCK_* constants
+ *
+ * @return              Number of elements written
+ */
+native fwrite(file, any:data, mode);
+
+/**
+ * Writes binary data to a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Array of items to write
+ * @param blocks        Number of items in the array
+ * @param mode          Size of each item in the array in bytes
+ *                      Valid sizes are 1, 2, or 4. See BLOCK_* constants
+ *
+ * @return              Number of elements written
+ */
+native fwrite_blocks(file, const any:data[], blocks, mode);
+
+/**
+ * Writes raw binary data to a file.
+ *
+ * @param file          Handle to the file.
+ * @param stream        Array of items to write.  The data is written directly.
+ *                      That is, in 1 or 2-byte mode, the lower byte(s) in
+ *                      each cell are used directly, rather than performing
+ *                      any casts from a 4-byte number to a smaller number.
+ * @param blocks        Size of each item in the array in bytes.
+ * @param mode          Number of items in the array.
+ *
+ * @return              Number of elements written
+ */
+native fwrite_raw(file, const any:stream[], blocks, mode);
+
+/**
+ * Tests if the end of file has been reached.
+ *
+ * @param file          Handle to the file
+ *
+ * @return              1 if end of file has been reached, 0 otherwise.
+ */
+native feof(file);
+
+/**
+ * Reads a line from a text file.
+ *
+ * @param file          Handle to the file.
+ * @param buffer        String buffer to hold the line
+ * @param maxlength     Maximum size of string buffer
+ *
+ * @return              Total number of characters written on success, 0 otherwise
+ */
+native fgets(file, buffer[], maxlength);
+
+/**
+ * Writes a line of text to a text file.
+ *
+ * @param file          Handle to the file
+ * @param text          String to write
+ * @param null_term     True to append NULL terminator, false otherwise
+ *
+ * @return              0 on success, -1 otherwise
+ */
+native fputs(file, const text[], bool:null_term = false);
+
+/**
+ * Writes a line of formatted text to a text file.
+ *
+ * @param file          Handle to the file
+ * @param format        Formatting rules
+ * @param ...           Variable number of format parameters
+ *
+ * @return              Total number of characters written on success, 0 otherwise
+ */
+native fprintf(file, const fmt[], any:...);
+
+/**
+ * Sets the file position indicator.
+ *
+ * @param file          Handle to the file
+ * @param position      Position relative to what is specified in whence
+ * @param start         SEEK_ constant value of where to see from
+ *
+ * @return              0 on success, a non-zero value otherwise
+ */
+native fseek(file, position, start);
+
+/**
+ * Gets current position in the file.
+ *
+ * @param file          Handle to the file
+ *
+ * @return              Value for the file position indicator
+ */
+native ftell(file);
+
+/**
+ * Gets character from file.
+ *
+ * @param file          Handle to the file
+ *
+ * @return              Character read on success, -1 otherwise
+ */
+native fgetc(file);
+
+/**
+ * Writes character to file
+ *
+ * @param file          Handle to the file
+ * @param data          Character to put
+ *
+ * @return              Character written on success, -1 otherwise
+ */
+native fputc(file, data);
+
+/**
+ * Ungets character from file.
+ *
+ * @param file          Handle to the file
+ * @param data          Character to unget
+ *
+ * @return              On success, the character put back is returned, -1 otherwise
+ */
+native fungetc(file, data);
+
+/**
+ * Flushes a buffered output stream.
+ *
+ * @param file          File handle, or 0 for all open streams
+ *
+ * @return              0 on success, -1 on failure
+ */
+native fflush(file);
+
+/**
+ * Gets the formatted file size in bytes.
+ *
+ * @param filename      Path to the file
+ * @param ...           Variable number of format parameters
+ *
+ * @return              File size in bytes, otherwise -1 if file not found
+ */
+native filesize(const filename[], any:...);
+
+/**
+ * Removes a directory.
+ *
+ * @note On most Operating Systems you cannot remove a directory which has files inside it.
+ *
+ * @param path          Path to the directory
+ *
+ * @return              1 on success, 0 otherwise
+ */
+native rmdir(const path[]);
+
+/**
+ * Creates a directory.
+ *
+ * @param path          Path to create
+ * @param mode          Permissions (default is o=rx,g=rx,u=rwx).  Note that folders must have
+ *                      the execute bit set on Linux.  On Windows, the mode is ignored.
+ * @param use_valve_fs  If true, the Valve file system will be used instead
+ *                      This can be used to create folders in the game's
+ *                      Valve search paths, rather than directly in the gamedir.
+ * @param valve_path_id If use_valve_fs, a search path from gameinfo or NULL_STRING for default
+ *                      In this case, mode is ignored
+ *
+ * @return              0 on success, -1 otherwise
+ */
+native mkdir(const dirname[], mode = FPERM_DIR_DEFAULT, bool:use_valve_fs = false, const valve_path_id[] = "GAMECONFIG");
+
+/**
+ * Deletes a file (delete_file macro)
+ *
+ * @param filename      Path of the file to delete
+ * @param use_valve_fs  If true, the Valve file system will be used instead.
+ *                      This can be used to delete files existing in the Valve
+ *                      search path, rather than solely files existing directly
+ *                      in the gamedir.
+ * @param valve_path_id If use_valve_fs, a search path from gameinfo or NULL_STRING for all search paths
+ *
+ * @return              1 on success, 0 on failure or if file not immediately removed
+ */
+native unlink(const filename[], bool:use_valve_fs = false, const valve_path_id[] = "GAMECONFIG");
+
+/**
+ * Opens a directory/folder for contents enumeration.
+ *
+ * @note Directories are closed with close_dir().
+ *
+ * @param dir           Path to open.
+ * @param firstfile     String buffer to hold first file name
+ * @param length        Maximum size of the string buffer
+ * @param type          Optional variable to store the file type
+ * @param use_valve_fs  If true, the Valve file system will be used instead.
+ *                      This can be used to find files existing in any of
+ *                      the Valve search paths, rather than solely files
+ *                      existing directly in the gamedir.
+ * @param valve_path_id If use_valve_fs, a search path from gameinfo or NULL_STRING for all search paths.
+ *
+ * @return              Handle to the directory, 0 otherwise
+ */
+native open_dir(dir[], firstfile[], length, &FileType:type = FileType_Unknown, bool:use_valve_fs = false, const valve_path_id[] = "GAME");
+
+/**
+ * Reads the next directory entry as a local filename.
+ *
+ * @note Contents of buffers are undefined when returning false.
+ * @note Both the '.' and '..' automatic directory entries will be retrieved for Windows and Linux.
+ *
+ * @param dirh          Handle to a directory
+ * @param buffer        String buffer to hold directory name
+ * @param length        Maximum size of string buffer
+ * @param type          Optional variable to store the file type. FileType_* constants
+ *
+ * @return              1 on success, 0 if there are no more files to read.
+ */
+native next_file(dirh, buffer[], length, &FileType:type = FileType_Unknown);
+
+/**
+ * Closes the directory.
+ *
+ * @param dirh          Handle to a directory
+ */
+native close_dir(dirh);
+
+/**
+ * Loads a file using the LoadFileForMe engine function.
+ *
+ * The data is truncated if there is not enough space.  No null-terminator
+ * is applied; the data is the raw contents of the file.
+ *
+ * @param file          File to load (may be a file from the GCF)
+ * @param buffer        Buffer to store file contents
+ * @param maxlength     Maximum size of the file buffer
+ * @param length        Variable to store the file length.  This may return
+ *                      a number larger than the buffer size
+ * @return              -1 if the file could not be loaded.  Otherwise,
+ *                      the number of cells actually written to the buffer
+ *                      are returned.
+ */
+native LoadFileForMe(const file[], buffer[], maxlength, &length = 0);
+
 /**
  * Returns a file timestamp as a unix timestamp.
  *
- * @param file          File name.
- * @param tmode         Time mode. See FileTime_* constants.
- * @return              Returns a file timestamp as a unix timestamp.
+ * @param file          File name
+ * @param tmode         Time mode, see FileTime_* constants
+ *
+ * @return              Returns a file timestamp as a unix timestamp
  */
-native GetFileTime( const file[], FileTimeType:tmode );
+native GetFileTime(const file[], FileTimeType:tmode);
+
+/**
+ * Changes a file or directories permissions.
+ *
+ * @param path          Path to the file
+ * @param mode          Permissions to set, see FPERM_* constants
+ *
+ * @return              True on success, false otherwise
+ */
+native bool:SetFilePermissions(const path[], mode);
+
+/**
+ * Reads a single int8 (byte) from a file. The returned value is sign-
+ * extended to an int32.
+ *
+ * @param file          Handle to the file
+ * @param data          Variable to store the data read
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileReadInt8(file, &any:data);
+
+/**
+ * Reads a single uint8 (unsigned byte) from a file. The returned value is
+ * zero-extended to an int32.
+ *
+ * @param file          Handle to the file
+ * @param data          Variable to store the data read
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileReadUint8(file, &any:data);
+
+/**
+ * Reads a single int16 (short) from a file. The value is sign-extended to
+ * an int32.
+ *
+ * @param file          Handle to the file
+ * @param data          Variable to store the data read
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileReadInt16(file, &any:data);
+
+/**
+ * Reads a single unt16 (unsigned short) from a file. The value is zero-
+ * extended to an int32.
+ *
+ * @param file          Handle to the file
+ * @param data          Variable to store the data read
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileReadUint16(file, &any:data);
+
+/**
+ * Reads a single int32 (int/cell) from a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Variable to store the data read
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileReadInt32(file, &any:data);
+
+/**
+ * Writes a single int8 (byte) to a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Data to write (truncated to an int8)
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileWriteInt8(file, any:data);
+
+/**
+ * Writes a single int16 (short) to a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Data to write (truncated to an int16)
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileWriteInt16(file, any:data);
+
+/**
+ * Writes a single int32 (int/cell) to a file.
+ *
+ * @param file          Handle to the file
+ * @param data          Data to write
+ *
+ * @return              True on success, false on failure
+ */
+native bool:FileWriteInt32(file, any:data);
+