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/* $Id: m_vector.h,v 1.1 2003-02-28 11:48:05 pj Exp $ */
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/*
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 * Mesa 3-D graphics library
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 * Version:  3.5
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 *
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 * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the "Software"),
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 * to deal in the Software without restriction, including without limitation
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * and/or sell copies of the Software, and to permit persons to whom the
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 * Software is furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included
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 * in all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 */
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/*
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 * New (3.1) transformation code written by Keith Whitwell.
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 */
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#ifndef _M_VECTOR_H_
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#define _M_VECTOR_H_
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#include "glheader.h"
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#include "mtypes.h"             /* hack for GLchan */
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#define VEC_DIRTY_0        0x1
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#define VEC_DIRTY_1        0x2
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#define VEC_DIRTY_2        0x4
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#define VEC_DIRTY_3        0x8
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#define VEC_MALLOC         0x10 /* storage field points to self-allocated mem*/
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#define VEC_NOT_WRITEABLE  0x40 /* writable elements to hold clipped data */
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#define VEC_BAD_STRIDE     0x100 /* matches tnl's prefered stride */
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#define VEC_SIZE_1   VEC_DIRTY_0
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#define VEC_SIZE_2   (VEC_DIRTY_0|VEC_DIRTY_1)
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#define VEC_SIZE_3   (VEC_DIRTY_0|VEC_DIRTY_1|VEC_DIRTY_2)
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#define VEC_SIZE_4   (VEC_DIRTY_0|VEC_DIRTY_1|VEC_DIRTY_2|VEC_DIRTY_3)
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/* Wrap all the information about vectors up in a struct.  Has
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 * additional fields compared to the other vectors to help us track of
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 * different vertex sizes, and whether we need to clean columns out
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 * because they contain non-(0,0,0,1) values.
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 *
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 * The start field is used to reserve data for copied vertices at the
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 * end of _mesa_transform_vb, and avoids the need for a multiplication in
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 * the transformation routines.
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 */
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typedef struct {
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   GLfloat (*data)[4];  /* may be malloc'd or point to client data */
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   GLfloat *start;      /* points somewhere inside of <data> */
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   GLuint count;        /* size of the vector (in elements) */
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   GLuint stride;       /* stride from one element to the next (in bytes) */
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   GLuint size;         /* 2-4 for vertices and 1-4 for texcoords */
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   GLuint flags;        /* which columns are dirty */
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   void *storage;       /* self-allocated storage */
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} GLvector4f;
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extern void _mesa_vector4f_init( GLvector4f *v, GLuint flags,
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                              GLfloat (*storage)[4] );
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extern void _mesa_vector4f_alloc( GLvector4f *v, GLuint flags,
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                               GLuint count, GLuint alignment );
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extern void _mesa_vector4f_free( GLvector4f *v );
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extern void _mesa_vector4f_print( GLvector4f *v, GLubyte *, GLboolean );
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extern void _mesa_vector4f_clean_elem( GLvector4f *vec, GLuint nr, GLuint elt );
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/* Could use a single vector type for normals and vertices, but
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 * this way avoids some casts.
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 */
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typedef struct {
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   GLfloat (*data)[3];
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   GLfloat *start;
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   GLuint count;
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   GLuint stride;
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   GLuint flags;
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   void *storage;
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} GLvector3f;
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extern void _mesa_vector3f_init( GLvector3f *v, GLuint flags, GLfloat (*)[3] );
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extern void _mesa_vector3f_alloc( GLvector3f *v, GLuint flags, GLuint count,
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                               GLuint alignment );
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extern void _mesa_vector3f_free( GLvector3f *v );
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extern void _mesa_vector3f_print( GLvector3f *v, GLubyte *, GLboolean );
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typedef struct {
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   GLfloat *data;
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   GLfloat *start;
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   GLuint count;
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   GLuint stride;
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   GLuint flags;
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   void *storage;
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} GLvector1f;
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extern void _mesa_vector1f_free( GLvector1f *v );
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extern void _mesa_vector1f_init( GLvector1f *v, GLuint flags, GLfloat * );
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extern void _mesa_vector1f_alloc( GLvector1f *v, GLuint flags, GLuint count,
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                               GLuint alignment );
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/* For 4ub rgba values.
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 */
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typedef struct {
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   GLubyte (*data)[4];
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   GLubyte *start;
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   GLuint count;
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   GLuint stride;
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   GLuint flags;
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   void *storage;
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} GLvector4ub;
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extern void _mesa_vector4ub_init( GLvector4ub *v, GLuint flags,
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                               GLubyte (*storage)[4] );
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extern void _mesa_vector4ub_alloc( GLvector4ub *v, GLuint flags, GLuint count,
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                                GLuint alignment );
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extern void _mesa_vector4ub_free( GLvector4ub * );
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/* For 4 * GLchan values.
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 */
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typedef struct {
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   GLchan (*data)[4];
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   GLchan *start;
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   GLuint count;
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   GLuint stride;
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   GLuint flags;
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   void *storage;
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} GLvector4chan;
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extern void _mesa_vector4chan_init( GLvector4chan *v, GLuint flags,
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                                 GLchan (*storage)[4] );
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extern void _mesa_vector4chan_alloc( GLvector4chan *v, GLuint flags, GLuint count,
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                                  GLuint alignment );
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extern void _mesa_vector4chan_free( GLvector4chan * );
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/* For 4 * GLushort rgba values.
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 */
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typedef struct {
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   GLushort (*data)[4];
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   GLushort *start;
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   GLuint count;
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   GLuint stride;
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   GLuint flags;
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   void *storage;
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} GLvector4us;
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extern void _mesa_vector4us_init( GLvector4us *v, GLuint flags,
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                               GLushort (*storage)[4] );
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extern void _mesa_vector4us_alloc( GLvector4us *v, GLuint flags, GLuint count,
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                                GLuint alignment );
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extern void _mesa_vector4us_free( GLvector4us * );
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/* For 1ub values, eg edgeflag.
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 */
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typedef struct {
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   GLubyte *data;
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   GLubyte *start;
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   GLuint count;
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   GLuint stride;
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   GLuint flags;
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   void *storage;
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} GLvector1ub;
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extern void _mesa_vector1ub_init( GLvector1ub *v, GLuint flags, GLubyte *storage);
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extern void _mesa_vector1ub_alloc( GLvector1ub *v, GLuint flags, GLuint count,
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                                GLuint alignment );
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extern void _mesa_vector1ub_free( GLvector1ub * );
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/* For, eg Index, Array element.
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 */
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typedef struct {
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   GLuint *data;
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   GLuint *start;
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   GLuint count;
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   GLuint stride;
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   GLuint flags;
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   void *storage;
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} GLvector1ui;
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extern void _mesa_vector1ui_init( GLvector1ui *v, GLuint flags, GLuint *storage );
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extern void _mesa_vector1ui_alloc( GLvector1ui *v, GLuint flags, GLuint count,
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                                GLuint alignment );
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extern void _mesa_vector1ui_free( GLvector1ui * );
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/*
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 * Given vector <v>, return a pointer (cast to <type *> to the <i>-th element.
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 *
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 * End up doing a lot of slow imuls if not careful.
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 */
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#define VEC_ELT( v, type, i ) \
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       ( (type *)  ( ((GLbyte *) ((v)->data)) + (i) * (v)->stride) )
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#endif