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/*************************************************************************** |
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* * |
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* libgig - C++ cross-platform Gigasampler format file loader library * |
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* * |
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* Copyright (C) 2003-2005 by Christian Schoenebeck * |
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* <cuse@users.sourceforge.net> * |
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* * |
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* This library is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This library is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#ifndef __LIBGIG_HELPER_H__ |
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#define __LIBGIG_HELPER_H__ |
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|
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#include <string.h> |
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#include <string> |
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#include <sstream> |
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|
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// *************** Helper Functions ************** |
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// * |
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|
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template<class T> inline std::string ToString(T o) { |
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std::stringstream ss; |
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ss << o; |
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return ss.str(); |
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} |
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|
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inline long Min(long A, long B) { |
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return (A > B) ? B : A; |
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} |
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|
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inline long Abs(long val) { |
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return (val > 0) ? val : -val; |
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} |
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|
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/** |
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* Swaps the order of the data words in the given memory area |
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* with a granularity given by \a WordSize. |
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* |
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* @param pData - pointer to the memory area to be swapped |
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* @param AreaSize - size of the memory area to be swapped (in bytes) |
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* @param WordSize - size of the data words (in bytes) |
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*/ |
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inline void SwapMemoryArea(void* pData, unsigned long AreaSize, uint WordSize) { |
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switch (WordSize) { // TODO: unefficient |
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case 1: { |
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uint8_t* pDst = (uint8_t*) pData; |
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uint8_t cache; |
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unsigned long lo = 0, hi = AreaSize - 1; |
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for (; lo < hi; hi--, lo++) { |
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cache = pDst[lo]; |
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pDst[lo] = pDst[hi]; |
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pDst[hi] = cache; |
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} |
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break; |
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} |
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case 2: { |
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uint16_t* pDst = (uint16_t*) pData; |
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uint16_t cache; |
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unsigned long lo = 0, hi = (AreaSize >> 1) - 1; |
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for (; lo < hi; hi--, lo++) { |
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cache = pDst[lo]; |
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pDst[lo] = pDst[hi]; |
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pDst[hi] = cache; |
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} |
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break; |
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} |
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case 4: { |
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uint32_t* pDst = (uint32_t*) pData; |
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uint32_t cache; |
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unsigned long lo = 0, hi = (AreaSize >> 2) - 1; |
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for (; lo < hi; hi--, lo++) { |
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cache = pDst[lo]; |
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pDst[lo] = pDst[hi]; |
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pDst[hi] = cache; |
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} |
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break; |
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} |
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default: { |
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uint8_t* pCache = new uint8_t[WordSize]; // TODO: unefficient |
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unsigned long lo = 0, hi = AreaSize - WordSize; |
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for (; lo < hi; hi -= WordSize, lo += WordSize) { |
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memcpy(pCache, (uint8_t*) pData + lo, WordSize); |
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memcpy((uint8_t*) pData + lo, (uint8_t*) pData + hi, WordSize); |
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memcpy((uint8_t*) pData + hi, pCache, WordSize); |
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} |
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delete[] pCache; |
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break; |
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} |
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} |
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} |
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|
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#endif // __LIBGIG_HELPER_H__ |