C++ Q_memcpy函数代码示例

/*
============
Cbuf_Execute
============
*/
void Cbuf_Execute (void)
{
	int		i;
	char	*text;
	char	line[1024];
	int		quotes;
	
	while (cmd_text.cursize)
	{
// find a \n or ; line break
		text = (char *)cmd_text.data;

		quotes = 0;
		for (i=0 ; i< cmd_text.cursize ; i++)
		{
			if (text[i] == '"')
				quotes++;
			if ( !(quotes&1) &&  text[i] == ';')
				break;	// don't break if inside a quoted string
			if (text[i] == '\n')
				break;
		}
			
				
		memcpy (line, text, i);
		line[i] = 0;
		
// delete the text from the command buffer and move remaining commands down
// this is necessary because commands (exec, alias) can insert data at the
// beginning of the text buffer

		if (i == cmd_text.cursize)
			cmd_text.cursize = 0;
		else
		{
			i++;
			cmd_text.cursize -= i;
			Q_memcpy (text, text+i, cmd_text.cursize);
		}

// execute the command line
		Cmd_ExecuteString (line);
		
		if (cmd_wait)
		{	// skip out while text still remains in buffer, leaving it
			// for next frame
			cmd_wait = false;
			break;
		}
	}
}

// When a command wants to issue other commands immediately, the text is
// inserted at the beginning of the buffer, before any remaining unexecuted
// commands.
void Cbuf_InsertText(char *text)
{

	int addLen = Q_strlen(text);
	int currLen = cmd_text.cursize;

	if (cmd_text.cursize + addLen >= cmd_text.maxsize)
	{
		Con_Printf(__FUNCTION__ ": overflow\n");
		return;
	}

#ifdef REHLDS_FIXES
	if (currLen)
		Q_memmove(cmd_text.data + addLen, cmd_text.data, currLen);

	Q_memcpy(cmd_text.data, text, addLen);
	cmd_text.cursize += addLen;

#else
	char *temp = NULL;
	if (currLen)
	{
		
		temp = (char *)Z_Malloc(currLen);	// TODO: Optimize: better use memmove without need for a temp buffer
		Q_memcpy(temp, cmd_text.data, currLen);
		SZ_Clear(&cmd_text);
	}

	Cbuf_AddText(text);

	if (currLen)
	{
		SZ_Write(&cmd_text, temp, currLen);
		Z_Free(temp);
	}
#endif // REHLDS_FIXES
}

void KeyValues::SetStringValue(char const *strValue)
{
	if (m_iDataType == TYPE_STRING || m_iDataType == TYPE_WSTRING)
		delete [] m_pValue;

	if (!strValue)
		strValue = "";

	int len = Q_strlen(strValue);
	m_sValue = new char[len + 1];
	Q_memcpy(m_sValue, strValue, len + 1);

	m_iDataType = TYPE_STRING;
}

void CDispMeshEvent::GetVirtualMesh( void *userData, virtualmeshlist_t *pList )
{
	Assert(userData==((void *)this));
	pList->pVerts = m_verts.Base();
	pList->indexCount = m_indexCount;
	pList->triangleCount = m_indexCount/3;
	pList->vertexCount = m_verts.Count();
	pList->surfacePropsIndex = 0;	// doesn't matter here, reset at runtime
	pList->pHull = NULL;
	int indexMax = ARRAYSIZE(pList->indices);
	int indexCount = min(m_indexCount, indexMax);
	Assert(m_indexCount < indexMax);
	Q_memcpy( pList->indices, m_pIndices, sizeof(*m_pIndices) * indexCount );
}

/*
===========
Cache_Move
===========
*/
void Cache_Move ( cache_system_t *c)
{
	cache_system_t		*new_cs;

// we are clearing up space at the bottom, so only allocate it late
	new_cs = Cache_TryAlloc (c->size, true);
	if (new_cs)
	{
//		Con_Printf ("cache_move ok\n");

		Q_memcpy ( new_cs+1, c+1, c->size - sizeof(cache_system_t) );
		new_cs->user = c->user;
		Q_memcpy (new_cs->name, c->name, sizeof(new_cs->name));
		Cache_Free (c->user, false); //johnfitz -- added second argument
		new_cs->user->data = (void *)(new_cs+1);
	}
	else
	{
//		Con_Printf ("cache_move failed\n");

		Cache_Free (c->user, true); // tough luck... //johnfitz -- added second argument
	}
}

int MSG_ReadBuf(int len, void *data) {

   if(data == NULL || len < 1) { Sys_Error("MSG_ReadBuf: Bad arguments."); }

   if(global_msg_readcount+len > global_net_message.cursize) {
      global_msg_badread = 1;
      return(-1);
   }

   Q_memcpy(data, global_net_message.data, len);
   global_msg_readcount += len;

   return(1);
}

/*
============
Cbuf_AddText

Adds command text at the end of the buffer
============
*/
void Cbuf_AddText( const char *text )
{
	int	l;

	l = Q_strlen( text );

	if( cmd_text.cursize + l >= cmd_text.maxsize )
	{
		MsgDev( D_WARN, "Cbuf_AddText: overflow\n" );
		return;
	}

	Q_memcpy( Cbuf_GetSpace( &cmd_text, l ), text, l ); 
}

/*
==================
CL_ParseMovevars

==================
*/
void CL_ParseMovevars( sizebuf_t *msg )
{
	Delta_InitClient ();	// finalize client delta's

	MSG_ReadDeltaMovevars( msg, &clgame.oldmovevars, &clgame.movevars );

	// update sky if changed
	if( Q_strcmp( clgame.oldmovevars.skyName, clgame.movevars.skyName ) && cl.video_prepped )
		R_SetupSky( clgame.movevars.skyName );

	Q_memcpy( &clgame.oldmovevars, &clgame.movevars, sizeof( movevars_t ));
	// keep features an actual!
	clgame.oldmovevars.features = clgame.movevars.features = host.features;
}

/*
=================
Mod_LoadSpriteFrame
=================
*/
void * Mod_LoadSpriteFrame (void * pin, mspriteframe_t **ppframe)
{
	dspriteframe_t		*pinframe;
	mspriteframe_t		*pspriteframe;
	int					i, width, height, size, origin[2];
	unsigned short		*ppixout;
	byte				*ppixin;

	pinframe = (dspriteframe_t *)pin;

	width = LittleLong (pinframe->width);
	height = LittleLong (pinframe->height);
	size = width * height;

	pspriteframe = Hunk_AllocName (sizeof (mspriteframe_t) + size*r_pixbytes,
								   loadname);

	Q_memset (pspriteframe, 0, sizeof (mspriteframe_t) + size);
	*ppframe = pspriteframe;

	pspriteframe->width = width;
	pspriteframe->height = height;
	origin[0] = LittleLong (pinframe->origin[0]);
	origin[1] = LittleLong (pinframe->origin[1]);

	pspriteframe->up = origin[1];
	pspriteframe->down = origin[1] - height;
	pspriteframe->left = origin[0];
	pspriteframe->right = width + origin[0];

	if (r_pixbytes == 1)
	{
		Q_memcpy (&pspriteframe->pixels[0], (byte *)(pinframe + 1), size);
	}
	else if (r_pixbytes == 2)
	{
		ppixin = (byte *)(pinframe + 1);
		ppixout = (unsigned short *)&pspriteframe->pixels[0];

		for (i=0 ; i<size ; i++)
			ppixout[i] = d_8to16table[ppixin[i]];
	}
	else
	{
		Sys_Error ("Mod_LoadSpriteFrame: driver set invalid r_pixbytes: %d\n",
				 r_pixbytes);
	}

	return (void *)((byte *)pinframe + sizeof (dspriteframe_t) + size);
}

/*
===========
Cache_Move
===========
*/
void Cache_Move ( cache_system_t *c)
{
	cache_system_t		*newmem;

// we are clearing up space at the bottom, so only allocate it late
	newmem = Cache_TryAlloc (c->size, true);
	if (newmem)
	{
//		Con_Printf ("cache_move ok\n");

		Q_memcpy ( newmem+1, c+1, c->size - sizeof(cache_system_t) );
		newmem->user = c->user;
		Q_memcpy (newmem->name, c->name, sizeof(newmem->name));
		Cache_Free (c->user);
		newmem->user->data = (void *)(newmem+1);
	}
	else
	{
//		Con_Printf ("cache_move failed\n");

		Cache_Free (c->user);		// tough luck...
	}
}

/* <2a451> ../engine/hashpak.c:217 */
qboolean HPAK_FindResource(hash_pack_directory_t *pDir, unsigned char *hash, struct resource_s *pResourceEntry)
{
	for (int i = 0; i < pDir->nEntries; i++)
	{
		if (Q_memcmp(hash, pDir->p_rgEntries[i].resource.rgucMD5_hash, 16) == 0)
		{
			if (pResourceEntry)
				Q_memcpy(pResourceEntry, &pDir->p_rgEntries[i].resource, sizeof(resource_t));

			return TRUE;
		}
	}
	return FALSE;
}

/* DESCRIPTION: SV_Trace_Toss
// LOCATION: sv_phys.c
// PATH: PF_TraceToss_Shared
//
// Say I throw a grenade.  Where will it go?  This function finds out by
// simulating ten seconds' worth of frames.
*/
trace_t * SV_Trace_Toss(trace_t * Outgoing_Trace, edict_t *tossent, edict_t *ignore) {

   int i;
   vec3_t var_378_end;
   vec3_t var_36C_move;
   trace_t var_360_trace;
   edict_t var_324_TempEdict;
   edict_t * var_328_TempEdictPtr;
   double var_380_host_frametime;

   var_380_host_frametime = host_frametime;
   host_frametime = .05;

   Q_memcpy(&var_324_TempEdict, tossent, sizeof(edict_t));

   var_328_TempEdictPtr = &var_324_TempEdict;

//   while(1) //a sanity check to avoid tracing more than ten seconds was present in QW, I think it's a good idea.  This may need to be adjusted to account for the alterable frametimes.
   for (i = 0; i < 200; i++)
   {
      SV_CheckVelocity(var_328_TempEdictPtr);
      SV_AddGravity(var_328_TempEdictPtr);
      VectorMA(var_328_TempEdictPtr->v.angles, host_frametime, var_328_TempEdictPtr->v.avelocity, var_328_TempEdictPtr->v.angles);
      VectorScale(var_328_TempEdictPtr->v.velocity, host_frametime, var_36C_move);
      VectorAdd(var_328_TempEdictPtr->v.origin, var_36C_move, var_378_end);

      var_360_trace = SV_Move(var_328_TempEdictPtr->v.origin, var_328_TempEdictPtr->v.mins, var_328_TempEdictPtr->v.maxs, var_378_end, 0, var_328_TempEdictPtr, 0);
      VectorCopy(var_360_trace.endpos, var_328_TempEdictPtr->v.origin);

      if(var_360_trace.pHit != NULL && var_360_trace.pHit != ignore) { break; }
   }

   host_frametime = var_380_host_frametime;
   Q_memcpy(Outgoing_Trace, &var_360_trace, sizeof(trace_t));
   return(Outgoing_Trace);
}

/*
====================
CL_DuplicateTexture

Dupliacte texture with remap pixels
====================
*/
void CL_DuplicateTexture( mstudiotexture_t *ptexture, int topcolor, int bottomcolor )
{
	gltexture_t	*glt;
	texture_t		*tx = NULL;
	char		texname[128];
	int		i, index;
	size_t size;
	byte		paletteBackup[768];
	byte		*raw, *pal;

	// save off the real texture index
	index = ptexture->index;
	glt = R_GetTexture( index );
	Q_snprintf( texname, sizeof( texname ), "#%i_%s", RI.currententity->curstate.number, glt->name + 1 );

	// search for pixels
	for( i = 0; i < RI.currentmodel->numtextures; i++ )
	{
		tx = RI.currentmodel->textures[i];
		if( tx->gl_texturenum == index )
			break; // found
	}

	ASSERT( tx != NULL );

	// backup original palette
	pal = (byte *)(tx + 1) + (tx->width * tx->height);
	Q_memcpy( paletteBackup, pal, 768 );

	raw = CL_CreateRawTextureFromPixels( tx, &size, topcolor, bottomcolor );
	ptexture->index = GL_LoadTexture( texname, raw, size, TF_FORCE_COLOR, NULL ); // do copy
	GL_SetTextureType( ptexture->index, TEX_REMAP );

	// restore original palette
	Q_memcpy( pal, paletteBackup, 768 );
}

void CHLSL_Solver_Array::OnIdentifierAlloc( IdentifierLists_t &List )
{
    SimpleArray *pArray = new SimpleArray();

    pArray->iNumComps = m_iNumComps;
    pArray->iSize_X = m_iSize_x;
    pArray->iSize_Y = m_iSize_y;
    pArray->iIndex = GetData().iNodeIndex;

    const int arraySize = m_iSize_x * m_iSize_y;
    pArray->vecData = new Vector4D[ arraySize ];
    Q_memcpy( pArray->vecData, m_vecData, sizeof(Vector4D) * arraySize );

    List.hList_Arrays.AddToTail( pArray );
}

/*
===================
SV_UpdateMovevars

check movevars for changes every frame
send updates to client if changed
===================
*/
void SV_UpdateMovevars( qboolean initialize )
{
	if( !initialize && !physinfo->modified )
		return;

	// check range
	if( sv_zmax->value < 256.0f ) Cvar_SetFloat( "sv_zmax", 256.0f );
	if( sv_zmax->value > 32767.0f ) Cvar_SetFloat( "sv_zmax", 32767.0f );

	svgame.movevars.gravity = sv_gravity->value;
	svgame.movevars.stopspeed = sv_stopspeed->value;
	svgame.movevars.maxspeed = sv_maxspeed->value;
	svgame.movevars.spectatormaxspeed = sv_spectatormaxspeed->value;
	svgame.movevars.accelerate = sv_accelerate->value;
	svgame.movevars.airaccelerate = sv_airaccelerate->value;
	svgame.movevars.wateraccelerate = sv_wateraccelerate->value;
	svgame.movevars.friction = sv_friction->value;
	svgame.movevars.edgefriction = sv_edgefriction->value;
	svgame.movevars.waterfriction = sv_waterfriction->value;
	svgame.movevars.bounce = sv_wallbounce->value;
	svgame.movevars.stepsize = sv_stepsize->value;
	svgame.movevars.maxvelocity = sv_maxvelocity->value;
	svgame.movevars.zmax = sv_zmax->value;
	svgame.movevars.waveHeight = sv_wateramp->value;
	Q_strncpy( svgame.movevars.skyName, sv_skyname->string, sizeof( svgame.movevars.skyName ));
	svgame.movevars.footsteps = sv_footsteps->integer;
	svgame.movevars.rollangle = sv_rollangle->value;
	svgame.movevars.rollspeed = sv_rollspeed->value;
	svgame.movevars.skycolor_r = sv_skycolor_r->value;
	svgame.movevars.skycolor_g = sv_skycolor_g->value;
	svgame.movevars.skycolor_b = sv_skycolor_b->value;
	svgame.movevars.skyvec_x = sv_skyvec_x->value;
	svgame.movevars.skyvec_y = sv_skyvec_y->value;
	svgame.movevars.skyvec_z = sv_skyvec_z->value;
	svgame.movevars.skydir_x = sv_skydir_x->value;
	svgame.movevars.skydir_y = sv_skydir_y->value;
	svgame.movevars.skydir_z = sv_skydir_z->value;
	svgame.movevars.skyangle = sv_skyangle->value;
	svgame.movevars.wateralpha = sv_wateralpha->value;
	svgame.movevars.features = host.features; // just in case. not really need

	if( initialize ) return; // too early

	if( MSG_WriteDeltaMovevars( &sv.reliable_datagram, &svgame.oldmovevars, &svgame.movevars ))
		Q_memcpy( &svgame.oldmovevars, &svgame.movevars, sizeof( movevars_t )); // oldstate changed

	physinfo->modified = false;
}