/* DirectMusicSynthesizer Main
 *
 * Copyright (C) 2003-2004 Rok Mandeljc
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <stdio.h>

#include "dmsynth_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(dmsynth);

typedef struct {
    /* IUnknown fields */
    IClassFactoryVtbl          *lpVtbl;
    DWORD                       ref;
} IClassFactoryImpl;

/******************************************************************
 *		DirectMusicSynth ClassFactory
 */
static HRESULT WINAPI SynthCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	FIXME("(%p, %s, %p): stub\n", This, debugstr_dmguid(riid), ppobj);
	return E_NOINTERFACE;
}

static ULONG WINAPI SynthCF_AddRef(LPCLASSFACTORY iface) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	return ++(This->ref);
}

static ULONG WINAPI SynthCF_Release(LPCLASSFACTORY iface) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	/* static class, won't be  freed */
	return --(This->ref);
}

static HRESULT WINAPI SynthCF_CreateInstance(LPCLASSFACTORY iface, LPUNKNOWN pOuter, REFIID riid, LPVOID *ppobj) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	TRACE ("(%p, %p, %s, %p)\n", This, pOuter, debugstr_dmguid(riid), ppobj);
	return DMUSIC_CreateDirectMusicSynthImpl (riid, ppobj, pOuter);
}

static HRESULT WINAPI SynthCF_LockServer(LPCLASSFACTORY iface,BOOL dolock) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	FIXME("(%p, %d): stub\n", This, dolock);
	return S_OK;
}

static IClassFactoryVtbl SynthCF_Vtbl = {
	SynthCF_QueryInterface,
	SynthCF_AddRef,
	SynthCF_Release,
	SynthCF_CreateInstance,
	SynthCF_LockServer
};

static IClassFactoryImpl Synth_CF = {&SynthCF_Vtbl, 1 };

/******************************************************************
 *		DirectMusicSynthSink ClassFactory
 */
static HRESULT WINAPI SynthSinkCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid,LPVOID *ppobj) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	FIXME("(%p, %s, %p): stub\n", This, debugstr_dmguid(riid), ppobj);
	return E_NOINTERFACE;
}

static ULONG WINAPI SynthSinkCF_AddRef(LPCLASSFACTORY iface) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	return ++(This->ref);
}

static ULONG WINAPI SynthSinkCF_Release(LPCLASSFACTORY iface) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	/* static class, won't be  freed */
	return --(This->ref);
}

static HRESULT WINAPI SynthSinkCF_CreateInstance(LPCLASSFACTORY iface, LPUNKNOWN pOuter, REFIID riid, LPVOID *ppobj) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	TRACE ("(%p, %p, %s, %p)\n", This, pOuter, debugstr_dmguid(riid), ppobj);
	return DMUSIC_CreateDirectMusicSynthSinkImpl (riid, ppobj, pOuter);
}

static HRESULT WINAPI SynthSinkCF_LockServer(LPCLASSFACTORY iface,BOOL dolock) {
	IClassFactoryImpl *This = (IClassFactoryImpl *)iface;
	FIXME("(%p, %d): stub\n", This, dolock);
	return S_OK;
}

static IClassFactoryVtbl SynthSinkCF_Vtbl = {
	SynthSinkCF_QueryInterface,
	SynthSinkCF_AddRef,
	SynthSinkCF_Release,
	SynthSinkCF_CreateInstance,
	SynthSinkCF_LockServer
};

static IClassFactoryImpl SynthSink_CF = {&SynthSinkCF_Vtbl, 1 };
	
/******************************************************************
 *		DllMain
 *
 *
 */
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {
	if (fdwReason == DLL_PROCESS_ATTACH) {
		DisableThreadLibraryCalls(hinstDLL);
		/* FIXME: Initialisation */
	} else if (fdwReason == DLL_PROCESS_DETACH) {
		/* FIXME: Cleanup */
	}

	return TRUE;
}


/******************************************************************
 *		DllCanUnloadNow (DMSYNTH.1)
 *
 *
 */
HRESULT WINAPI DMSYNTH_DllCanUnloadNow(void) {
    FIXME("(void): stub\n");
    return S_FALSE;
}


/******************************************************************
 *		DllGetClassObject (DMSYNTH.2)
 *
 *
 */
HRESULT WINAPI DMSYNTH_DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv) {
    TRACE("(%s, %s, %p)\n", debugstr_dmguid(rclsid), debugstr_dmguid(riid), ppv);
    if (IsEqualCLSID (rclsid, &CLSID_DirectMusicSynth) && IsEqualIID (riid, &IID_IClassFactory)) {
		*ppv = (LPVOID) &Synth_CF;
		IClassFactory_AddRef((IClassFactory*)*ppv);
		return S_OK;		
	} else if (IsEqualCLSID (rclsid, &CLSID_DirectMusicSynth) && IsEqualIID (riid, &IID_IClassFactory)) {
		*ppv = (LPVOID) &SynthSink_CF;
		IClassFactory_AddRef((IClassFactory*)*ppv);
		return S_OK;		
	} 

    WARN("(%s,%s,%p): no interface found.\n", debugstr_dmguid(rclsid), debugstr_dmguid(riid), ppv);
    return CLASS_E_CLASSNOTAVAILABLE;
}

/******************************************************************
 *		Helper functions
 *
 *
 */

/* FOURCC to string conversion for debug messages */
const char *debugstr_fourcc (DWORD fourcc) {
    if (!fourcc) return "'null'";
    return wine_dbg_sprintf ("\'%c%c%c%c\'",
		(char)(fourcc), (char)(fourcc >> 8),
        (char)(fourcc >> 16), (char)(fourcc >> 24));
}

/* DMUS_VERSION struct to string conversion for debug messages */
const char *debugstr_dmversion (LPDMUS_VERSION version) {
	if (!version) return "'null'";
	return wine_dbg_sprintf ("\'%i,%i,%i,%i\'",
		(int)((version->dwVersionMS && 0xFFFF0000) >> 8), (int)(version->dwVersionMS && 0x0000FFFF), 
		(int)((version->dwVersionLS && 0xFFFF0000) >> 8), (int)(version->dwVersionLS && 0x0000FFFF));
}

/* returns name of given GUID */
const char *debugstr_dmguid (const GUID *id) {
	static const guid_info guids[] = {
		/* CLSIDs */
		GE(CLSID_AudioVBScript),
		GE(CLSID_DirectMusic),
		GE(CLSID_DirectMusicAudioPath),
		GE(CLSID_DirectMusicAudioPathConfig),
		GE(CLSID_DirectMusicAuditionTrack),
		GE(CLSID_DirectMusicBand),
		GE(CLSID_DirectMusicBandTrack),
		GE(CLSID_DirectMusicChordMapTrack),
		GE(CLSID_DirectMusicChordMap),
		GE(CLSID_DirectMusicChordTrack),
		GE(CLSID_DirectMusicCollection),
		GE(CLSID_DirectMusicCommandTrack),
		GE(CLSID_DirectMusicComposer),
		GE(CLSID_DirectMusicContainer),
		GE(CLSID_DirectMusicGraph),
		GE(CLSID_DirectMusicLoader),
		GE(CLSID_DirectMusicLyricsTrack),
		GE(CLSID_DirectMusicMarkerTrack),
		GE(CLSID_DirectMusicMelodyFormulationTrack),
		GE(CLSID_DirectMusicMotifTrack),
		GE(CLSID_DirectMusicMuteTrack),
		GE(CLSID_DirectMusicParamControlTrack),
		GE(CLSID_DirectMusicPatternTrack),
		GE(CLSID_DirectMusicPerformance),
		GE(CLSID_DirectMusicScript),
		GE(CLSID_DirectMusicScriptAutoImpSegment),
		GE(CLSID_DirectMusicScriptAutoImpPerformance),
		GE(CLSID_DirectMusicScriptAutoImpSegmentState),
		GE(CLSID_DirectMusicScriptAutoImpAudioPathConfig),
		GE(CLSID_DirectMusicScriptAutoImpAudioPath),
		GE(CLSID_DirectMusicScriptAutoImpSong),
		GE(CLSID_DirectMusicScriptSourceCodeLoader),
		GE(CLSID_DirectMusicScriptTrack),
		GE(CLSID_DirectMusicSection),
		GE(CLSID_DirectMusicSegment),
		GE(CLSID_DirectMusicSegmentState),
		GE(CLSID_DirectMusicSegmentTriggerTrack),
		GE(CLSID_DirectMusicSegTriggerTrack),
		GE(CLSID_DirectMusicSeqTrack),
		GE(CLSID_DirectMusicSignPostTrack),
		GE(CLSID_DirectMusicSong),
		GE(CLSID_DirectMusicStyle),
		GE(CLSID_DirectMusicStyleTrack),
		GE(CLSID_DirectMusicSynth),
		GE(CLSID_DirectMusicSynthSink),
		GE(CLSID_DirectMusicSysExTrack),
		GE(CLSID_DirectMusicTemplate),
		GE(CLSID_DirectMusicTempoTrack),
		GE(CLSID_DirectMusicTimeSigTrack),
		GE(CLSID_DirectMusicWaveTrack),
		GE(CLSID_DirectSoundWave),
		/* IIDs */
		GE(IID_IDirectMusic),
		GE(IID_IDirectMusic2),
		GE(IID_IDirectMusic8),
		GE(IID_IDirectMusicAudioPath),
		GE(IID_IDirectMusicBand),
		GE(IID_IDirectMusicBuffer),
		GE(IID_IDirectMusicChordMap),
		GE(IID_IDirectMusicCollection),
		GE(IID_IDirectMusicComposer),
		GE(IID_IDirectMusicContainer),
		GE(IID_IDirectMusicDownload),
		GE(IID_IDirectMusicDownloadedInstrument),
		GE(IID_IDirectMusicGetLoader),
		GE(IID_IDirectMusicGraph),
		GE(IID_IDirectMusicInstrument),
		GE(IID_IDirectMusicLoader),
		GE(IID_IDirectMusicLoader8),
		GE(IID_IDirectMusicObject),
		GE(IID_IDirectMusicPatternTrack),
		GE(IID_IDirectMusicPerformance),
		GE(IID_IDirectMusicPerformance2),
		GE(IID_IDirectMusicPerformance8),
		GE(IID_IDirectMusicPort),
		GE(IID_IDirectMusicPortDownload),
		GE(IID_IDirectMusicScript),
		GE(IID_IDirectMusicSegment),
		GE(IID_IDirectMusicSegment2),
		GE(IID_IDirectMusicSegment8),
		GE(IID_IDirectMusicSegmentState),
		GE(IID_IDirectMusicSegmentState8),
		GE(IID_IDirectMusicStyle),
		GE(IID_IDirectMusicStyle8),
		GE(IID_IDirectMusicSynth),
		GE(IID_IDirectMusicSynth8),
		GE(IID_IDirectMusicSynthSink),
		GE(IID_IDirectMusicThru),
		GE(IID_IDirectMusicTool),
		GE(IID_IDirectMusicTool8),
		GE(IID_IDirectMusicTrack),
		GE(IID_IDirectMusicTrack8),
		GE(IID_IUnknown),
		GE(IID_IPersistStream),
		GE(IID_IStream),
		GE(IID_IClassFactory),
		/* GUIDs */
		GE(GUID_DirectMusicAllTypes),
		GE(GUID_NOTIFICATION_CHORD),
		GE(GUID_NOTIFICATION_COMMAND),
		GE(GUID_NOTIFICATION_MEASUREANDBEAT),
		GE(GUID_NOTIFICATION_PERFORMANCE),
		GE(GUID_NOTIFICATION_RECOMPOSE),
		GE(GUID_NOTIFICATION_SEGMENT),
		GE(GUID_BandParam),
		GE(GUID_ChordParam),
		GE(GUID_CommandParam),
		GE(GUID_CommandParam2),
		GE(GUID_CommandParamNext),
		GE(GUID_IDirectMusicBand),
		GE(GUID_IDirectMusicChordMap),
		GE(GUID_IDirectMusicStyle),
		GE(GUID_MuteParam),
		GE(GUID_Play_Marker),
		GE(GUID_RhythmParam),
		GE(GUID_TempoParam),
		GE(GUID_TimeSignature),
		GE(GUID_Valid_Start_Time),
		GE(GUID_Clear_All_Bands),
		GE(GUID_ConnectToDLSCollection),
		GE(GUID_Disable_Auto_Download),
		GE(GUID_DisableTempo),
		GE(GUID_DisableTimeSig),
		GE(GUID_Download),
		GE(GUID_DownloadToAudioPath),
		GE(GUID_Enable_Auto_Download),
		GE(GUID_EnableTempo),
		GE(GUID_EnableTimeSig),
		GE(GUID_IgnoreBankSelectForGM),
		GE(GUID_SeedVariations),
		GE(GUID_StandardMIDIFile),
		GE(GUID_Unload),
		GE(GUID_UnloadFromAudioPath),
		GE(GUID_Variations),
		GE(GUID_PerfMasterTempo),
		GE(GUID_PerfMasterVolume),
		GE(GUID_PerfMasterGrooveLevel),
		GE(GUID_PerfAutoDownload),
		GE(GUID_DefaultGMCollection),
		GE(GUID_Synth_Default),
		GE(GUID_Buffer_Reverb),
		GE(GUID_Buffer_EnvReverb),
		GE(GUID_Buffer_Stereo),
		GE(GUID_Buffer_3D_Dry),
		GE(GUID_Buffer_Mono),
		GE(GUID_DMUS_PROP_GM_Hardware),
		GE(GUID_DMUS_PROP_GS_Capable),
		GE(GUID_DMUS_PROP_GS_Hardware),
		GE(GUID_DMUS_PROP_DLS1),
		GE(GUID_DMUS_PROP_DLS2),
		GE(GUID_DMUS_PROP_Effects),
		GE(GUID_DMUS_PROP_INSTRUMENT2),
		GE(GUID_DMUS_PROP_LegacyCaps),
		GE(GUID_DMUS_PROP_MemorySize),
		GE(GUID_DMUS_PROP_SampleMemorySize),
		GE(GUID_DMUS_PROP_SamplePlaybackRate),
		GE(GUID_DMUS_PROP_SetSynthSink),
		GE(GUID_DMUS_PROP_SinkUsesDSound),
		GE(GUID_DMUS_PROP_SynthSink_DSOUND),
		GE(GUID_DMUS_PROP_SynthSink_WAVE),
		GE(GUID_DMUS_PROP_Volume),
		GE(GUID_DMUS_PROP_WavesReverb),
		GE(GUID_DMUS_PROP_WriteLatency),
		GE(GUID_DMUS_PROP_WritePeriod),
		GE(GUID_DMUS_PROP_XG_Capable),
		GE(GUID_DMUS_PROP_XG_Hardware)
	};

	unsigned int i;

        if (!id) return "(null)";

	for (i = 0; i < sizeof(guids)/sizeof(guids[0]); i++) {
		if (IsEqualGUID(id, &guids[i].guid))
			return guids[i].name;
	}
	/* if we didn't find it, act like standard debugstr_guid */	
	return debugstr_guid(id);
}	

/* returns name of given error code */
const char *debugstr_dmreturn (DWORD code) {
	static const flag_info codes[] = {
		FE(S_OK),
		FE(S_FALSE),
		FE(DMUS_S_PARTIALLOAD),
		FE(DMUS_S_PARTIALDOWNLOAD),
		FE(DMUS_S_REQUEUE),
		FE(DMUS_S_FREE),
		FE(DMUS_S_END),
		FE(DMUS_S_STRING_TRUNCATED),
		FE(DMUS_S_LAST_TOOL),
		FE(DMUS_S_OVER_CHORD),
		FE(DMUS_S_UP_OCTAVE),
		FE(DMUS_S_DOWN_OCTAVE),
		FE(DMUS_S_NOBUFFERCONTROL),
		FE(DMUS_S_GARBAGE_COLLECTED),
		FE(DMUS_E_DRIVER_FAILED),
		FE(DMUS_E_PORTS_OPEN),
		FE(DMUS_E_DEVICE_IN_USE),
		FE(DMUS_E_INSUFFICIENTBUFFER),
		FE(DMUS_E_BUFFERNOTSET),
		FE(DMUS_E_BUFFERNOTAVAILABLE),
		FE(DMUS_E_NOTADLSCOL),
		FE(DMUS_E_INVALIDOFFSET),
		FE(DMUS_E_ALREADY_LOADED),
		FE(DMUS_E_INVALIDPOS),
		FE(DMUS_E_INVALIDPATCH),
		FE(DMUS_E_CANNOTSEEK),
		FE(DMUS_E_CANNOTWRITE),
		FE(DMUS_E_CHUNKNOTFOUND),
		FE(DMUS_E_INVALID_DOWNLOADID),
		FE(DMUS_E_NOT_DOWNLOADED_TO_PORT),
		FE(DMUS_E_ALREADY_DOWNLOADED),
		FE(DMUS_E_UNKNOWN_PROPERTY),
		FE(DMUS_E_SET_UNSUPPORTED),
		FE(DMUS_E_GET_UNSUPPORTED),
		FE(DMUS_E_NOTMONO),
		FE(DMUS_E_BADARTICULATION),
		FE(DMUS_E_BADINSTRUMENT),
		FE(DMUS_E_BADWAVELINK),
		FE(DMUS_E_NOARTICULATION),
		FE(DMUS_E_NOTPCM),
		FE(DMUS_E_BADWAVE),
		FE(DMUS_E_BADOFFSETTABLE),
		FE(DMUS_E_UNKNOWNDOWNLOAD),
		FE(DMUS_E_NOSYNTHSINK),
		FE(DMUS_E_ALREADYOPEN),
		FE(DMUS_E_ALREADYCLOSED),
		FE(DMUS_E_SYNTHNOTCONFIGURED),
		FE(DMUS_E_SYNTHACTIVE),
		FE(DMUS_E_CANNOTREAD),
		FE(DMUS_E_DMUSIC_RELEASED),
		FE(DMUS_E_BUFFER_EMPTY),
		FE(DMUS_E_BUFFER_FULL),
		FE(DMUS_E_PORT_NOT_CAPTURE),
		FE(DMUS_E_PORT_NOT_RENDER),
		FE(DMUS_E_DSOUND_NOT_SET),
		FE(DMUS_E_ALREADY_ACTIVATED),
		FE(DMUS_E_INVALIDBUFFER),
		FE(DMUS_E_WAVEFORMATNOTSUPPORTED),
		FE(DMUS_E_SYNTHINACTIVE),
		FE(DMUS_E_DSOUND_ALREADY_SET),
		FE(DMUS_E_INVALID_EVENT),
		FE(DMUS_E_UNSUPPORTED_STREAM),
		FE(DMUS_E_ALREADY_INITED),
		FE(DMUS_E_INVALID_BAND),
		FE(DMUS_E_TRACK_HDR_NOT_FIRST_CK),
		FE(DMUS_E_TOOL_HDR_NOT_FIRST_CK),
		FE(DMUS_E_INVALID_TRACK_HDR),
		FE(DMUS_E_INVALID_TOOL_HDR),
		FE(DMUS_E_ALL_TOOLS_FAILED),
		FE(DMUS_E_ALL_TRACKS_FAILED),
		FE(DMUS_E_NOT_FOUND),
		FE(DMUS_E_NOT_INIT),
		FE(DMUS_E_TYPE_DISABLED),
		FE(DMUS_E_TYPE_UNSUPPORTED),
		FE(DMUS_E_TIME_PAST),
		FE(DMUS_E_TRACK_NOT_FOUND),
		FE(DMUS_E_TRACK_NO_CLOCKTIME_SUPPORT),
		FE(DMUS_E_NO_MASTER_CLOCK),
		FE(DMUS_E_LOADER_NOCLASSID),
		FE(DMUS_E_LOADER_BADPATH),
		FE(DMUS_E_LOADER_FAILEDOPEN),
		FE(DMUS_E_LOADER_FORMATNOTSUPPORTED),
		FE(DMUS_E_LOADER_FAILEDCREATE),
		FE(DMUS_E_LOADER_OBJECTNOTFOUND),
		FE(DMUS_E_LOADER_NOFILENAME),
		FE(DMUS_E_INVALIDFILE),
		FE(DMUS_E_ALREADY_EXISTS),
		FE(DMUS_E_OUT_OF_RANGE),
		FE(DMUS_E_SEGMENT_INIT_FAILED),
		FE(DMUS_E_ALREADY_SENT),
		FE(DMUS_E_CANNOT_FREE),
		FE(DMUS_E_CANNOT_OPEN_PORT),
		FE(DMUS_E_CANNOT_CONVERT),
		FE(DMUS_E_DESCEND_CHUNK_FAIL),
		FE(DMUS_E_NOT_LOADED),
		FE(DMUS_E_SCRIPT_LANGUAGE_INCOMPATIBLE),
		FE(DMUS_E_SCRIPT_UNSUPPORTED_VARTYPE),
		FE(DMUS_E_SCRIPT_ERROR_IN_SCRIPT),
		FE(DMUS_E_SCRIPT_CANTLOAD_OLEAUT32),
		FE(DMUS_E_SCRIPT_LOADSCRIPT_ERROR),
		FE(DMUS_E_SCRIPT_INVALID_FILE),
		FE(DMUS_E_INVALID_SCRIPTTRACK),
		FE(DMUS_E_SCRIPT_VARIABLE_NOT_FOUND),
		FE(DMUS_E_SCRIPT_ROUTINE_NOT_FOUND),
		FE(DMUS_E_SCRIPT_CONTENT_READONLY),
		FE(DMUS_E_SCRIPT_NOT_A_REFERENCE),
		FE(DMUS_E_SCRIPT_VALUE_NOT_SUPPORTED),
		FE(DMUS_E_INVALID_SEGMENTTRIGGERTRACK),
		FE(DMUS_E_INVALID_LYRICSTRACK),
		FE(DMUS_E_INVALID_PARAMCONTROLTRACK),
		FE(DMUS_E_AUDIOVBSCRIPT_SYNTAXERROR),
		FE(DMUS_E_AUDIOVBSCRIPT_RUNTIMEERROR),
		FE(DMUS_E_AUDIOVBSCRIPT_OPERATIONFAILURE),
		FE(DMUS_E_AUDIOPATHS_NOT_VALID),
		FE(DMUS_E_AUDIOPATHS_IN_USE),
		FE(DMUS_E_NO_AUDIOPATH_CONFIG),
		FE(DMUS_E_AUDIOPATH_INACTIVE),
		FE(DMUS_E_AUDIOPATH_NOBUFFER),
		FE(DMUS_E_AUDIOPATH_NOPORT),
		FE(DMUS_E_NO_AUDIOPATH),
		FE(DMUS_E_INVALIDCHUNK),
		FE(DMUS_E_AUDIOPATH_NOGLOBALFXBUFFER),
		FE(DMUS_E_INVALID_CONTAINER_OBJECT)
	};
	unsigned int i;
	for (i = 0; i < sizeof(codes)/sizeof(codes[0]); i++) {
		if (code == codes[i].val)
			return codes[i].name;
	}
	/* if we didn't find it, return value */
	return wine_dbg_sprintf("0x%08lx", code);
}

/* generic flag-dumping function */
const char* debugstr_flags (DWORD flags, const flag_info* names, size_t num_names){
	char buffer[128] = "", *ptr = &buffer[0];
	unsigned int i, size = sizeof(buffer);
	
	for (i=0; i < num_names; i++)
	{
		if ((flags & names[i].val) ||	/* standard flag*/
			((!flags) && (!names[i].val))) { /* zero value only */
				int cnt = snprintf(ptr, size, "%s ", names[i].name);
				if (cnt < 0 || cnt >= size) break;
				size -= cnt;
				ptr += cnt;
		}
	}
	
	return wine_dbg_sprintf("%s", buffer);
}