120 lines
4.7 KiB
C++
120 lines
4.7 KiB
C++
/*************************************************************************/
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/* copymem.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included 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, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef COPYMEM_H
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#define COPYMEM_H
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#include "typedefs.h"
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///@TODO use optimized routines for this, depending on platform. these are just the standard ones
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#define copymem(m_to,m_from,m_count) \
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do { \
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unsigned char * _from=(unsigned char*)m_from; \
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unsigned char * _to=(unsigned char*)m_to; \
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int _count=m_count; \
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for (int _i=0;_i<_count;_i++) \
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_to[_i]=_from[_i]; \
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} while (0);
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/*
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case 0: *_dto++ = *_dfrom++; \
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case 7: *_dto++ = *_dfrom++; \
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case 6: *_dto++ = *_dfrom++; \
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case 5: *_dto++ = *_dfrom++; \
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case 4: *_dto++ = *_dfrom++; \
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case 3: *_dto++ = *_dfrom++; \
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case 2: *_dto++ = *_dfrom++; \
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case 1: *_dto++ = *_dfrom++; \
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*/
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#define movemem_duff(m_to, m_from, m_count) \
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do { \
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if (m_to<m_from) { \
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unsigned char* _dto = (unsigned char*)m_to; \
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unsigned char* _dfrom = (unsigned char*)m_from; \
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int n = (m_count + 7) / 8; \
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switch (m_count % 8) { \
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do { \
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case 0: *_dto++ = *_dfrom++; \
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case 7: *_dto++ = *_dfrom++; \
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case 6: *_dto++ = *_dfrom++; \
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case 5: *_dto++ = *_dfrom++; \
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case 4: *_dto++ = *_dfrom++; \
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case 3: *_dto++ = *_dfrom++; \
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case 2: *_dto++ = *_dfrom++; \
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case 1: *_dto++ = *_dfrom++; \
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} while (--n > 0); \
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}; \
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} else if (m_to>m_from) { \
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unsigned char* _dto = &((unsigned char*)m_to)[m_count-1]; \
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unsigned char* _dfrom = &((unsigned char*)m_from)[m_count-1]; \
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int n = (m_count + 7) / 8; \
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switch (m_count % 8) { \
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do { \
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case 0: *_dto-- = *_dfrom--; \
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case 7: *_dto-- = *_dfrom--; \
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case 6: *_dto-- = *_dfrom--; \
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case 5: *_dto-- = *_dfrom--; \
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case 4: *_dto-- = *_dfrom--; \
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case 3: *_dto-- = *_dfrom--; \
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case 2: *_dto-- = *_dfrom--; \
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case 1: *_dto-- = *_dfrom--; \
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} while (--n > 0); \
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}; \
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} \
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} while(0) \
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#define movemem_conventional(m_to,m_from,m_count) \
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do { \
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if (m_to<m_from) { \
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unsigned char * _from=(unsigned char*)m_from; \
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unsigned char * _to=(unsigned char*)m_to; \
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int _count=m_count; \
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for (int _i=0;_i<_count;_i++) \
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_to[_i]=_from[_i]; \
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\
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} else if (m_to>m_from) { \
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unsigned char * _from=(unsigned char*)m_from; \
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unsigned char * _to=(unsigned char*)m_to; \
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int _count=m_count; \
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while (_count--) \
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_to[_count]=_from[_count]; \
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\
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\
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} \
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} while (0); \
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void movemem_system(void*,void*,int);
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#define movemem movemem_system
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void zeromem(void* p_mem,size_t p_bytes);
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#endif
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