565 lines
20 KiB
Plaintext
565 lines
20 KiB
Plaintext
This document should help new developers get started. Like all of Wine, it
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is a work in progress.
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SOURCE TREE STRUCTURE
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=====================
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The Wine source tree is loosely based on the original Windows modules.
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Most of the source is concerned with implementing the Wine API, although
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there are also various tools, documentation, sample Winelib code, and
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code specific to the binary loader. Note that several of the libraries
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listed here are "stubbed out", meaning they still need to be implemented.
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DLLs (under dlls/):
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-------------------
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advapi32/ - Crypto, systeminfo, security, eventlogging
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avicap32/ - AVI capture window class
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avifil32/ - COM object to play AVI files
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cabinet/ - Cabinet file interface
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capi2032/ - Wrapper library for CAPI4Linux access
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cfgmgr32/ - Config manager
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comcat/ - Component category manager
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comctl32/ - Common controls
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commdlg/ - Common dialog boxes (both 16 & 32 bit)
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crtdll/ - Old C runtime library
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crypt32/ - Cryptography
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ctl3d/ - 3D Effects for Common GUI Components
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d3d8/ - Direct3D (3D graphics)
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d3d9/ - Direct3D (3D graphics)
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d3dim/ - Direct3D Immediate Mode
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d3dx8/ - Direct3D (3D graphics)
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dciman32/ - DCI Manager (graphics)
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ddraw/ - DirectDraw (graphics)
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devenum/ - Device enumeration (part of DirectShow)
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dinput/ - DirectInput (device input)
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dinput8/ - DirectInput (device input)
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dmband/ - DirectMusic Band
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dmcompos/ - DirectMusic Composer
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dmime/ - DirectMusic Interactive Engine
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dmloader/ - DirectMusic Loader
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dmscript/ - DirectMusic Scripting
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dmstyle/ - DirectMusic Style Engine
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dmsynth/ - DirectMusic Software Synthesizer
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dmusic/ - DirectMusic Core Services
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dmusic32/ - DirectMusic Legacy Port
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dplay/ - DirectPlay (networking)
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dplayx/ - DirectPlay (networking)
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dpnhpast/ - DirectPlay NAT Helper PAST
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dsound/ - DirectSound (audio)
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dswave/ - DirectMusic Wave
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gdi/ - GDI (graphics)
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glu32/ - OpenGL Utility library (graphics)
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glut32/ - OpenGL Utility Toolkit
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iccvid/ - Radius Cinepak Video Decoder
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icmp/ - ICMP protocol (networking)
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imagehlp/ - PE (Portable Executable) Image Helper lib
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imm32/ - Input Method Manager
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iphlpapi/ - IP Helper API
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kernel/ - The Windows kernel
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lzexpand/ - Lempel-Ziv compression/decompression
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mapi32/ - Mail interface
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mpr/ - Multi-Protocol Router (networking)
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msacm/ - Audio Compression Manager (multimedia)
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msacm/imaadp32/ - IMA ADPCM Audio Codec
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msacm/msadp32/ - MS ADPCM Audio Codec
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msacm/msg711/ - MS G711 Audio Codec (includes A-Law & MU-Law)
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msacm/winemp3/ - Mpeg Layer 3 Audio Codec
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msdmo/ - DirectX Media Objects
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mshtml/ - MS HTML component
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msimg32/ - Gradient and transparency (graphics)
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msisys/ - System information
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msi/ - Microsoft Installer
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msnet32/ - Network interface
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msvcrt/ - C runtime library
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msvcrt20/ - C runtime library version 2.0
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msvcrt40/ - C runtime library version 4.0
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msvcrtd/ - C runtime library debugging
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msvidc32/ - Microsoft Video-1 Decoder
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msvideo/ - 16 bit video manager
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msvideo/msrle32/ - Video codecs
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mswsock/ - Misc networking
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netapi32/ - Network interface
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newdev/ - New Hardware Device Library
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ntdll/ - NT implementation of kernel calls
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odbc32/ - Open DataBase Connectivity driver manager
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ole32/ - 32 bit OLE 2.0 libraries
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oleacc/ - OLE accessibility support
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oleaut32/ - 32 bit OLE 2.0 automation
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olecli/ - 16 bit OLE client
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oledlg/ - OLE 2.0 user interface support
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olepro32/ - 32 bit OLE 2.0 automation
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olesvr/ - 16 bit OLE server
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opengl32/ - OpenGL implementation (graphics)
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psapi/ - Process Status interface
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qcap/ - DirectShow runtime
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quartz/ - DirectShow runtime
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rasapi32/ - Remote Access Server interface
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richedit/ - Rich text editing control
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rpcrt4/ - Remote Procedure Call runtime
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serialui/ - Serial port property pages
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setupapi/ - Setup interface
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shdocvw/ - Shell document object and control
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shfolder/ - Shell folder service
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shell32/ - COM object implementing shell views
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shlwapi/ - Shell Light-Weight interface
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snmpapi/ - SNMP protocol interface (networking)
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sti/ - Still Image service
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tapi32/ - Telephone interface
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ttydrv/ - TTY display driver (Wine specific)
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twain/ - TWAIN Imaging device communications
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unicows/ - Unicows replacement (Unicode layer for Win9x)
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url/ - Internet shortcut shell extension
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urlmon/ - URL Moniker allows binding to a URL (like KIO/gnome-vfs)
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user/ - Window management, standard controls, etc.
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uxtheme/ - Theme library
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version/ - File installation library
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win32s/ - 32-bit function access for 16-bit systems
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winaspi/ - 16 bit Advanced SCSI Peripheral Interface
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wined3d/ - Wine internal Direct3D helper
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winedos/ - DOS features and BIOS calls (interrupts) (wine specific)
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wineps/ - Postscript driver (Wine specific)
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wininet/ - Internet extensions
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winmm/ - Multimedia (16 & 32 bit)
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winmm/joystick/ - Joystick driver
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winmm/mcianim/ - MCI animation driver
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winmm/mciavi/ - MCI video driver
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winmm/mcicda/ - MCI audio CD driver
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winmm/mciseq/ - MCI MIDI driver
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winmm/mciwave/ - MCI wave driver
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winmm/midimap/ - MIDI mapper
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winmm/wavemap/ - Audio mapper
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winmm/winealsa/ - ALSA audio driver
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winmm/winearts/ - aRts audio driver
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winmm/wineaudioio/ - audioio audio driver
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winmm/winejack/ - JACK audio server driver
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winmm/winenas/ - NAS audio driver
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winmm/wineoss/ - OSS audio driver
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winnls/ - National Language Support
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winsock/ - Sockets 2.0 (networking)
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wsock32/ - Sockets 1.1 (networking)
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wintab32/ - Tablet device interface
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winspool/ - Printing & Print Spooler
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wintrust/ - Trust verification interface
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wow32/ - WOW subsystem
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x11drv/ - X11 display driver (Wine specific)
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Winelib programs (under programs/):
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-----------------------------------
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avitools/ - AVI information viewer and player
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clock/ - Graphical clock
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cmdlgtst/ - Common dialog tests
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control/ - Control panel
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expand/ - Decompress Lempel-Ziv compressed archive
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notepad/ - Notepad with RichEdit functionality
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progman/ - Program manager
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regedit/ - Registry editor
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regsvr32/ - Register COM server
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rpcss/ - RPC services
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rundll32/ - Execute DLL functions directly
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start/ - Replacement for start.exe
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uninstaller/ - Remove installed programs
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view/ - Metafile viewer
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wcmd/ - Command line interface
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wineboot/ - Wine bootstrap process
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winecfg/ - Wine configuration utility
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wineconsole/ - Console
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winedbg/ - Debugger
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winefile/ - File manager
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winemenubuilder/ - Helper program for building Unix menu entries
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winemine/ - Mine game
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winepath/ - Translate between Wine and Unix paths
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winetest/ - Wine testing shell
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winevdm/ - Wine virtual DOS machine
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winhelp/ - Help viewer
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winver/ - Windows Version Program
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Support programs, libraries, etc:
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---------------------------------
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dlls/dxguid/ - DirectX UUID import lib
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dlls/uuid/ - Windows-compatible UUID import lib
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documentation/ - some documentation
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documentation/samples/ - sample configuration files
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include/ - Windows standard includes
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include/msvcrt/ - MSVC compatible libc headers
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include/wine/ - Wine specific headers
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libs/ - the Wine libraries
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libs/port/ - portability library
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libs/unicode/ - Unicode support shared
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libs/wine/ - Wine bootstrap library
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libs/wpp/ - C preprocessor
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loader/ - the main Wine loader
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server/ - the Wine server
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tools/ - various tools used to build/check Wine
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tools/widl/ - the IDL compiler
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tools/winapi{,_check}/ - A Win32 API checker
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tools/winebuild/ - Wine build tool
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tools/winedump/ - a .DLL dump utility
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tools/winegcc/ - a MinGW command line compatible gcc wrapper
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tools/wmc/ - the message compiler
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tools/wpp/ - the C pre-processor library
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tools/wrc/ - the resource compiler
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Miscellaneous:
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--------------
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Note: these directories will ultimately get moved into their
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respective dlls.
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files/ - KERNEL file I/O
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misc/ - KERNEL registry
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graphics/ - GDI graphics drivers
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objects/ - GDI logical objects
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controls/ - USER built-in widgets
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windows/ - USER window management
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IMPLEMENTING NEW API CALLS
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==========================
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This is the simple version, and covers only Win32. Win16 is slightly
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uglier, because of the Pascal heritage and the segmented memory model.
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All of the Win32 APIs known to Wine are listed in the .spec file of
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their corresponding dll. An unimplemented call will look like (from
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gdi32.spec)
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269 stub PolyBezierTo
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To implement this call, you need to do the following four things.
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1. Find the appropriate parameters for the call, and add a prototype to
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the correct header file. In this case, that means [include/wingdi.h],
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and it might look like
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BOOL WINAPI PolyBezierTo(HDC, LPCVOID, DWORD);
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If the function has both an ASCII and a Unicode version, you need to
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define both and add a #define WINELIB_NAME_AW declaration. See below
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for discussion of function naming conventions.
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2. Modify the .spec file to tell Wine that the function has an
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implementation, what the parameters look like and what Wine function
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to use for the implementation. In Win32, things are simple--everything
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is 32-bits. However, the relay code handles pointers and pointers to
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strings slightly differently, so you should use 'str' and 'wstr' for
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strings, 'ptr' for other pointer types, and 'long' for everything else.
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269 stdcall PolyBezierTo(long ptr long) PolyBezierTo
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The 'PolyBezierTo' at the end of the line is which Wine function to use
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for the implementation.
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3. Implement the function as a stub. Once you add the function to the .spec
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file, you must add the function to the Wine source before it will link.
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Add a function called 'PolyBezierTo' somewhere. Good things to put
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into a stub:
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o a correct prototype, including the WINAPI
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o header comments, including full documentation for the function and
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arguments (see documentation/README.documentation)
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o A FIXME message and an appropriate return value are good things to
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put in a stub.
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/************************************************************
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* PolyBezierTo (GDI32.269)
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*
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* Draw many Bezier curves.
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*
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* RETURNS
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* Success: Non-zero.
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* Failure: FALSE. Use GetLastError() to find the error cause.
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*
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* BUGS
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* Unimplemented
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*/
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BOOL WINAPI PolyBezierTo(HDC hdc, /* [In] Device context to draw to */
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LPCVOID p, /* [In] Array of POINT structs */
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DWORD count /* [In] Number of points in p */
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)
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{
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/* tell the user they've got a substandard implementation */
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FIXME(gdi, ":(%x,%p,%d): stub\n", hdc, p, count);
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/* some programs may be able to compensate,
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* if they know what happened
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*/
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SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
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return FALSE; /* error value */
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}
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4. Implement and test the rest of the function.
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IMPLEMENTING A NEW DLL
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======================
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Generic directions
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------------------
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Apart from writing the set of needed .c files, you also need to do the
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following:
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1. Create a directory <MyDll> where to store the implementation of
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the DLL. This directory has to be put under the dlls/ directory.
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If the DLL exists under Windows as both 16 and 32 bit DLL, you
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should have a single directory with both implementations.
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2. Create the Makefile.in in the ./dlls/<MyDll>/ directory. You can
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copy an existing Makefile.in from another ./dlls/ subdirectory.
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You need at least to change the MODULE and C_SRCS macros.
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3. Add the directory in ./configure.ac (in AC_OUTPUT macro at the end
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of the file to trigger the Makefile generation)
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4. Run ./make_dlls in the dlls directory to update Makefile.in in
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that directory.
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5. You can now regenerate ./configure file (with 'make configure')
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and the various Makefiles (with 'configure; make depend') (run
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from the top of Wine's tree).
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You should now have a Makefile file in ./dlls/<MyDll>/
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6. Create the .spec file for the DLL exported functions in your
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directory. Refer to 'Implementation of new API calls' earlier in
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this document for more information on this part.
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7. You can now start adding .c files. For the .h files, if they are
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standard Windows one, put them in include/. If they are linked to
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*your* implementation of the dll, put them in your newly created
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directory.
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Debug channels
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--------------
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If you need to create a new debug channel, just add the
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WINE_DEFAULT_DEBUG_CHANNEL to your .c file(s), and use them.
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All the housekeeping will happen automatically.
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Resources
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---------
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If you also need to add resources to your DLL, then create the .rc
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file. Add to your ./dlls/<MyDll>/Makefile.in, in the RC_SRCS macro,
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the list of .rc files to add to the DLL. See dlls/comctl32/ for an
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example of this.
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Thunking
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--------
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If you're building a 16 & 32 bit DLLs pair, then from the 32 bit code
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you might need to call 16 bit routine. The way to do it to add in the
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code, fragments like:
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/* ### Start build ### */
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extern WORD CALLBACK <PREFIX>_CallTo16_word_wwlll(FARPROC16,WORD,WORD,LONG,LONG,LONG);
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/* ### stop build ### */
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Where <PREFIX>_ is an internal prefix for your module. The first
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parameter is always of type FARPROC16. Then, you can get the regular
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list of parameters. The _word_wwlll indicates the type of return (long
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or word) and the size of the parameters (here l=>long, w=>word; which
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maps to WORD,WORD,LONG,LONG,LONG.
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You can put several functions between the Start/Stop build pair.
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You can also read the winebuild manpage for more details on this.
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Then, add to ./dlls/<MyDll>/Makefile.in a line like:
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EXTRA_OBJS = $(MODULE).glue.o
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See dlls/winmm/ for an example of this.
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MEMORY AND SEGMENTS
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===================
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NE (Win16) executables consist of multiple segments. The Wine loader
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loads each segment into a unique location in the Wine processes memory
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and assigns a selector to that segment. Because of this, it's not
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possible to exchange addresses freely between 16-bit and 32-bit code.
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Addresses used by 16-bit code are segmented addresses (16:16), formed
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by a 16-bit selector and a 16-bit offset. Those used by the Wine code
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are regular 32-bit linear addresses.
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There are four ways to obtain a segmented pointer:
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- Using the MapLS function (recommended).
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- Allocate a block of memory from the global heap and use
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WIN16_GlobalLock to get its segmented address.
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- Declare the argument as 'segptr' instead of 'ptr' in the spec file
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for a given API function.
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Once you have a segmented pointer, it must be converted to a linear
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pointer before you can use it from 32-bit code. This can be done with
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the MapSL function. The linear pointer can then be used freely with
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standard Unix functions like memcpy() etc. without worrying about 64k
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boundaries. Note: there's no easy way to convert back from a linear
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to a segmented address.
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In most cases, you don't need to worry about segmented address, as the
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conversion is made automatically by the callback code and the API
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functions only see linear addresses. However, in some cases it is
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necessary to manipulate segmented addresses; the most frequent cases
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are:
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- API functions that return a pointer
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- lParam of Windows messages that point to a structure
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- Pointers contained inside structures accessed by 16-bit code.
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It is usually a good practice to used the type 'SEGPTR' for segmented
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pointers, instead of something like 'LPSTR' or 'char *'. As SEGPTR is
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defined as a DWORD, you'll get a compilation warning if you mistakenly
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use it as a regular 32-bit pointer.
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STRUCTURE PACKING
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=================
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Under Windows, data structures are tightly packed, i.e. there is no
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padding between structure members. On the other hand, by default gcc
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aligns structure members (e.g. WORDs are on a WORD boundary, etc.).
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This means that a structure like
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struct { BYTE x; WORD y; };
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will take 3 bytes under Windows, but 4 with gcc, because gcc will add a
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dummy byte between x and y. To have the correct layout for structures
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used by Windows code, you need to embed the struct within two special
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#include's which will take care of the packing for you:
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#include "pshpack1.h"
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struct { BYTE x; WORD y; };
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#include "poppack1.h"
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For alignment on a 2-byte boundary, there is a "pshpack2.h", etc.
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The use of the WINE_PACKED attribute is obsolete. Please remove these
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in favour of the above solution.
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Using WINE_PACKED, you would declare the above structure like this:
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struct { BYTE x; WORD y WINE_PACKED; };
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You had to do this every time a structure member is not aligned
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correctly under Windows (i.e. a WORD not on an even address, or a
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DWORD on a address that was not a multiple of 4).
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NAMING CONVENTIONS FOR API FUNCTIONS AND TYPES
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==============================================
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In order to support both Win16 and Win32 APIs within the same source
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code, the following convention must be used in naming all API
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functions and types. If the Windows API uses the name 'xxx', the Wine
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code must use:
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- 'xxx16' for the Win16 version,
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- 'xxx' for the Win32 version when no ASCII/Unicode strings are
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involved,
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- 'xxxA' for the Win32 version with ASCII strings,
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- 'xxxW' for the Win32 version with Unicode strings.
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If the function has both ASCII and Unicode version, you should then
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use the macros WINELIB_NAME_AW(xxx) or DECL_WINELIB_TYPE_AW(xxx)
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(defined in include/windef.h) to define the correct 'xxx' function
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or type for Winelib. When compiling Wine itself, 'xxx' is _not_
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defined, meaning that code inside of Wine must always specify
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explicitly the ASCII or Unicode version.
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If 'xxx' is the same in Win16 and Win32, you can simply use the same
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name as Windows, i.e. just 'xxx'. If 'xxx' is Win16 only, you could
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use the name as is, but it's preferable to use 'xxx16' to make it
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clear it is a Win16 function.
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Examples:
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typedef struct { /* Win32 ASCII data structure */ } WNDCLASSA;
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typedef struct { /* Win32 Unicode data structure */ } WNDCLASSW;
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typedef struct { /* Win16 data structure */ } WNDCLASS16;
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DECL_WINELIB_TYPE_AW(WNDCLASS);
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ATOM RegisterClass16( WNDCLASS16 * );
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ATOM RegisterClassA( WNDCLASSA * );
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ATOM RegisterClassW( WNDCLASSW * );
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#define RegisterClass WINELIB_NAME_AW(RegisterClass)
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|
|
The Winelib user can then say:
|
|
|
|
WNDCLASS wc = { ... };
|
|
RegisterClass( &wc );
|
|
|
|
and this will use the correct declaration depending on the definition
|
|
of the UNICODE symbol.
|
|
|
|
|
|
NAMING CONVENTIONS FOR NON-API FUNCTIONS AND TYPES
|
|
==================================================
|
|
|
|
Functions and data which are internal to your code (or at least shouldn't be
|
|
visible to any Winelib or Windows program) should be preceded by
|
|
an identifier to the module:
|
|
|
|
Examples:
|
|
|
|
ENUMPRINTERS_GetDWORDFromRegistryA() (in dlls/winspool/info.c)
|
|
IAVIFile_fnRelease() (in dlls/avifil32/avifile.c)
|
|
X11DRV_CreateDC() (in graphics/x11drv/init.c)
|
|
|
|
if you need prototypes for these, there are a few possibilities:
|
|
- within same source file only:
|
|
put the prototypes at the top of your file and mark them as prototypes.
|
|
- within the same module:
|
|
create a header file within the subdirectory where that module resides,
|
|
e.g. graphics/ddraw_private.h
|
|
- from a totally different module, or for use in winelib:
|
|
you should never do that. Only exported APIs can be called across
|
|
module boundaries.
|
|
|
|
|
|
DEBUG MESSAGES
|
|
==============
|
|
|
|
To display a message only during debugging, you normally write something
|
|
like this:
|
|
|
|
TRACE("abc..."); or
|
|
FIXME("abc..."); or
|
|
WARN("abc..."); or
|
|
ERR("abc...");
|
|
|
|
depending on the seriousness of the problem. (documentation/debugging.sgml
|
|
explains when it is appropriate to use each of them). You need to declare
|
|
the debug channel name at the top of the file (after the includes) using
|
|
the WINE_DEFAULT_DEBUG_CHANNEL macro, like so:
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(win);
|
|
|
|
If your debugging code is more complex than just printf, you can use
|
|
the macros:
|
|
|
|
TRACE_ON(xxx), WARN_ON(xxx), ERR_ON(xxx) and FIXME_ON(xxx)
|
|
|
|
to test if the given channel is enabled. Thus, you can write:
|
|
|
|
if (TRACE_ON(win)) DumpSomeStructure(&str);
|
|
|
|
Don't worry about the inefficiency of the test. If it is permanently
|
|
disabled (that is TRACE_ON(win) is 0 at compile time), the compiler will
|
|
eliminate the dead code.
|
|
|
|
For more info about debugging messages, read:
|
|
|
|
http://www.winehq.org/site/docs/wine-devel/debugging
|
|
|
|
|
|
MORE INFO
|
|
=========
|
|
|
|
1. There is a FREE online version of the MSDN library (including
|
|
documentation for the Win32 API) on http://msdn.microsoft.com/
|
|
or http://www.msdn.com/
|
|
|
|
2. Windows apilist: http://www.mentalis.org/apilist/apilist.php
|
|
|
|
3. http://www.sonic.net/~undoc/bookstore.html
|
|
|
|
4. In 1993 Dr. Dobbs Journal published a column called "Undocumented Corner".
|
|
|
|
5. www.geocities.com/SiliconValley/4942/
|