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/*************************************************************************** |
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* * |
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* libgig - C++ cross-platform Gigasampler format file access library * |
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* * |
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* Copyright (C) 2003-2020 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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#include <algorithm> |
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|
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#if defined(WIN32) && !HAVE_CONFIG_H && !defined(_MSC_VER) |
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# include "../win32/libgig_private.h" // like config.h, automatically generated by Dev-C++ |
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# define PACKAGE "libgig" |
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# define VERSION VER_STRING // VER_STRING defined in libgig_private.h |
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#endif // WIN32 |
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|
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#if (HAVE_CONFIG_H /*&& !HAVE_VASPRINTF*/ && defined(WIN32)) || defined(_MSC_VER) |
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# include <stdarg.h> |
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int vasprintf(char** ret, const char* format, va_list arg); |
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#endif |
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|
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#if defined(_MSC_VER) |
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# if _MSC_VER < 1900 |
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# error versions prior to msvc 2015 have not been tested |
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# else |
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# include <BaseTsd.h> |
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typedef SSIZE_T ssize_t; |
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# endif |
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#endif |
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|
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#include "RIFF.h" |
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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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// Behaves as printf() just that it returns it as string instead of writing to stdout. |
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inline std::string strPrint(const char* fmt, ...) { |
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va_list args; |
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va_start(args, fmt); |
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char* buf = NULL; |
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vasprintf(&buf, fmt, args); |
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std::string res = buf; |
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if (buf) free(buf); |
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va_end(args); |
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return res; |
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} |
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|
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inline std::string toLowerCase(std::string s) { |
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std::transform(s.begin(), s.end(), s.begin(), ::tolower); |
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return s; |
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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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inline void swapBytes_16(void* Word) { |
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uint8_t byteCache = *((uint8_t*) Word); |
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*((uint8_t*) Word) = *((uint8_t*) Word + 1); |
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*((uint8_t*) Word + 1) = byteCache; |
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} |
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|
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inline void swapBytes_32(void* Word) { |
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uint8_t byteCache = *((uint8_t*) Word); |
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*((uint8_t*) Word) = *((uint8_t*) Word + 3); |
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*((uint8_t*) Word + 3) = byteCache; |
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byteCache = *((uint8_t*) Word + 1); |
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*((uint8_t*) Word + 1) = *((uint8_t*) Word + 2); |
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*((uint8_t*) Word + 2) = byteCache; |
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} |
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|
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inline void swapBytes_64(void* Word) { |
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uint8_t byteCache = ((uint8_t*)Word)[0]; |
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((uint8_t*)Word)[0] = ((uint8_t*)Word)[7]; |
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((uint8_t*)Word)[7] = byteCache; |
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byteCache = ((uint8_t*)Word)[1]; |
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((uint8_t*)Word)[1] = ((uint8_t*)Word)[6]; |
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((uint8_t*)Word)[6] = byteCache; |
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byteCache = ((uint8_t*)Word)[2]; |
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((uint8_t*)Word)[2] = ((uint8_t*)Word)[5]; |
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((uint8_t*)Word)[5] = byteCache; |
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byteCache = ((uint8_t*)Word)[3]; |
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((uint8_t*)Word)[3] = ((uint8_t*)Word)[4]; |
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((uint8_t*)Word)[4] = byteCache; |
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} |
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|
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inline void swapBytes(void* Word, uint64_t WordSize) { |
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uint8_t byteCache; |
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uint64_t lo = 0, hi = WordSize - 1; |
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for (; lo < hi; hi--, lo++) { |
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byteCache = *((uint8_t*) Word + lo); |
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*((uint8_t*) Word + lo) = *((uint8_t*) Word + hi); |
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*((uint8_t*) Word + hi) = byteCache; |
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} |
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} |
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|
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/** |
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* Stores a 16 bit integer in memory using little-endian format. |
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* |
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* @param pData - memory pointer |
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* @param data - integer to be stored |
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*/ |
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inline void store16(uint8_t* pData, uint16_t data) { |
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pData[0] = data; |
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pData[1] = data >> 8; |
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} |
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|
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/** |
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* Stores a 32 bit integer in memory using little-endian format. |
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* |
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* @param pData - memory pointer |
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* @param data - integer to be stored |
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*/ |
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inline void store32(uint8_t* pData, uint32_t data) { |
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pData[0] = data; |
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pData[1] = data >> 8; |
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pData[2] = data >> 16; |
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pData[3] = data >> 24; |
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} |
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|
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/** |
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* Stores a 64 bit integer in memory using little-endian format. |
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* |
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* @param pData - memory pointer |
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* @param data - integer to be stored |
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*/ |
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inline void store64(uint8_t* pData, uint64_t data) { |
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pData[0] = data; |
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pData[1] = data >> 8; |
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pData[2] = data >> 16; |
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pData[3] = data >> 24; |
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pData[4] = data >> 32; |
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pData[5] = data >> 40; |
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pData[6] = data >> 48; |
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pData[7] = data >> 56; |
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} |
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|
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/** |
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* Loads a 16 bit integer in memory using little-endian format. |
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* |
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* @param pData - memory pointer |
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* @returns 16 bit data word |
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*/ |
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inline uint16_t load16(uint8_t* pData) { |
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return uint16_t(pData[0]) | |
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uint16_t(pData[1]) << 8; |
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} |
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|
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/** |
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* Loads a 32 bit integer in memory using little-endian format. |
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* |
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* @param pData - memory pointer |
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* @returns 32 bit data word |
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*/ |
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inline uint32_t load32(uint8_t* pData) { |
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return uint32_t(pData[0]) | |
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uint32_t(pData[1]) << 8 | |
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uint32_t(pData[2]) << 16 | |
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uint32_t(pData[3]) << 24; |
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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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if (!AreaSize) return; // AreaSize==0 would cause a segfault here |
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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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if (pCache) 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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/** @brief Load given info field (string). |
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* |
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* Load info field string from given info chunk (\a ck) and save value to \a s. |
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*/ |
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inline void LoadString(RIFF::Chunk* ck, std::string& s) { |
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if (ck) { |
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const char* str = (char*)ck->LoadChunkData(); |
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if (!str) { |
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ck->ReleaseChunkData(); |
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s = ""; |
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return; |
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} |
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int size = (int) ck->GetSize(); |
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int len; |
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for (len = 0 ; len < size ; len++) |
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if (str[len] == '\0') break; |
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s.assign(str, len); |
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ck->ReleaseChunkData(); |
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} |
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} |
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|
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/** @brief Apply given INFO field to the respective chunk. |
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* |
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* Apply given info value string to given info chunk, which is a |
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* subchunk of INFO list chunk \a lstINFO. If the given chunk already |
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* exists, value \a s will be applied. Otherwise if it doesn't exist yet |
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* and either \a s or \a sDefault is not an empty string, such a chunk |
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* will be created and either \a s or \a sDefault will be applied |
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* (depending on which one is not an empty string, if both are not an |
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* empty string \a s will be preferred). |
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* |
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* @param ChunkID - 32 bit RIFF chunk ID of INFO subchunk (only used in case \a ck is NULL) |
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* @param ck - INFO (sub)chunk where string should be stored to |
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* @param lstINFO - parent (INFO) RIFF list chunk |
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* @param s - current value of info field |
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* @param sDefault - default value |
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* @param bUseFixedLengthStrings - should a specific string size be forced in the chunk? |
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* @param size - wanted size of the INFO chunk. This is ignored if bUseFixedLengthStrings is false. |
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*/ |
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inline void SaveString(uint32_t ChunkID, RIFF::Chunk* ck, RIFF::List* lstINFO, const std::string& s, const std::string& sDefault, bool bUseFixedLengthStrings, int size) { |
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if (ck) { // if chunk exists already, use 's' as value |
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if (!bUseFixedLengthStrings) size = (int) s.size() + 1; |
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ck->Resize(size); |
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char* pData = (char*) ck->LoadChunkData(); |
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strncpy(pData, s.c_str(), size); |
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} else if (s != "" || sDefault != "" || bUseFixedLengthStrings) { // create chunk |
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const std::string& sToSave = (s != "") ? s : sDefault; |
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if (!bUseFixedLengthStrings) size = (int) sToSave.size() + 1; |
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ck = lstINFO->AddSubChunk(ChunkID, size); |
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char* pData = (char*) ck->LoadChunkData(); |
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strncpy(pData, sToSave.c_str(), size); |
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} |
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} |
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|
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// private helper function to convert progress of a subprocess into the global progress |
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inline void __notify_progress(RIFF::progress_t* pProgress, float subprogress) { |
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if (pProgress && pProgress->callback) { |
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const float totalrange = pProgress->__range_max - pProgress->__range_min; |
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const float totalprogress = pProgress->__range_min + subprogress * totalrange; |
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pProgress->factor = totalprogress; |
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pProgress->callback(pProgress); // now actually notify about the progress |
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} |
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} |
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|
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// private helper function to divide a progress into subprogresses |
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inline void __divide_progress(RIFF::progress_t* pParentProgress, RIFF::progress_t* pSubProgress, float totalTasks, float currentTask) { |
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if (pParentProgress && pParentProgress->callback) { |
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const float totalrange = pParentProgress->__range_max - pParentProgress->__range_min; |
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pSubProgress->callback = pParentProgress->callback; |
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pSubProgress->custom = pParentProgress->custom; |
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pSubProgress->__range_min = pParentProgress->__range_min + totalrange * currentTask / totalTasks; |
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pSubProgress->__range_max = pSubProgress->__range_min + totalrange / totalTasks; |
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} |
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} |
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|
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// private helper function to divide a progress into subprogresses |
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inline void __divide_progress(RIFF::progress_t* pParentProgress, RIFF::progress_t* pSubProgress, float total, float lo, float hi) { |
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if (pParentProgress && pParentProgress->callback) { |
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const float totalrange = pParentProgress->__range_max - pParentProgress->__range_min; |
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pSubProgress->callback = pParentProgress->callback; |
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pSubProgress->custom = pParentProgress->custom; |
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pSubProgress->__range_min = pParentProgress->__range_min + totalrange * (lo / total); |
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pSubProgress->__range_max = pSubProgress->__range_min + totalrange * ((hi-lo) / total); |
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} |
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} |
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|
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|
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/***************************************************************************** |
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* Any problems with any of the following helper functions? * |
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* * |
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* Then please first have a look at their current TEST CASES at * |
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* src/testcases/HelperTest.cpp as basis for your modifications! * |
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*****************************************************************************/ |
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|
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|
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/// Removes one or more consecutive occurences of @a needle from the end of @a haystack. |
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inline std::string strip2ndFromEndOf1st(const std::string haystack, char needle) { |
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if (haystack.empty()) return haystack; |
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if (*haystack.rbegin() != needle) return haystack; |
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for (int i = haystack.length() - 1; i >= 0; --i) |
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if (haystack[i] != needle) |
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return haystack.substr(0, i+1); |
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return ""; |
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} |
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|
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#ifndef NATIVE_PATH_SEPARATOR |
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# ifdef _WIN32 |
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# define NATIVE_PATH_SEPARATOR '\\' |
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# else |
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# define NATIVE_PATH_SEPARATOR '/' |
| 361 |
# endif |
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#endif |
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|
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/** |
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* Returns the owning path of the given path (its parent path). So for example |
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* passing "/some/path" would return "/some". |
| 367 |
*/ |
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inline std::string parentPath(const std::string path) { |
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if (path.empty()) return path; |
| 370 |
std::string s = strip2ndFromEndOf1st(path, NATIVE_PATH_SEPARATOR); |
| 371 |
if (s.empty()) { |
| 372 |
s.push_back(NATIVE_PATH_SEPARATOR); // i.e. return "/" |
| 373 |
return s; |
| 374 |
} |
| 375 |
#if defined(_WIN32) |
| 376 |
if (s.length() == 2 && s[1] == ':') |
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return s; |
| 378 |
#endif |
| 379 |
std::size_t pos = s.find_last_of(NATIVE_PATH_SEPARATOR); |
| 380 |
if (pos == std::string::npos) return ""; |
| 381 |
if (pos == 0) { |
| 382 |
s = ""; |
| 383 |
s.push_back(NATIVE_PATH_SEPARATOR); // i.e. return "/" |
| 384 |
return s; |
| 385 |
} |
| 386 |
return s.substr(0, pos); |
| 387 |
} |
| 388 |
|
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/** |
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* Returns the last (lowest) portion of the given path. So for example passing |
| 391 |
* "/some/path" would return "path". |
| 392 |
*/ |
| 393 |
inline std::string lastPathComponent(const std::string path) { |
| 394 |
#if defined(_WIN32) |
| 395 |
if (path.length() == 2 && path[1] == ':') |
| 396 |
return ""; |
| 397 |
#endif |
| 398 |
std::size_t pos = path.find_last_of(NATIVE_PATH_SEPARATOR); |
| 399 |
return (pos == std::string::npos) ? path : path.substr(pos+1); |
| 400 |
} |
| 401 |
|
| 402 |
/** |
| 403 |
* Returns the given path with the type extension being stripped from its end. |
| 404 |
* So for example passing "/some/path.foo" would return "/some/path". |
| 405 |
*/ |
| 406 |
inline std::string pathWithoutExtension(const std::string path) { |
| 407 |
std::size_t posSep = path.find_last_of(NATIVE_PATH_SEPARATOR); |
| 408 |
std::size_t posBase = (posSep == std::string::npos) ? 0 : posSep+1; |
| 409 |
std::size_t posDot = path.find_last_of("."); |
| 410 |
return (posDot != std::string::npos && posDot > posBase) |
| 411 |
? path.substr(0, posDot) : path; |
| 412 |
} |
| 413 |
|
| 414 |
/** |
| 415 |
* Returns the type extension of the given path. So for example passing |
| 416 |
* "/some/path.foo" would return "foo". |
| 417 |
*/ |
| 418 |
inline std::string extensionOfPath(const std::string path) { |
| 419 |
std::size_t posSep = path.find_last_of(NATIVE_PATH_SEPARATOR); |
| 420 |
std::size_t posBase = (posSep == std::string::npos) ? 0 : posSep+1; |
| 421 |
std::size_t posDot = path.find_last_of("."); |
| 422 |
return (posDot != std::string::npos && posDot > posBase) |
| 423 |
? path.substr(posDot+1) : ""; |
| 424 |
} |
| 425 |
|
| 426 |
/** |
| 427 |
* Combines the two given paths with each other. So for example passing |
| 428 |
* "/some/path" and "/another/one" would return "/some/path/another/one". |
| 429 |
*/ |
| 430 |
inline std::string concatPath(const std::string path1, const std::string path2) { |
| 431 |
return (!path1.empty() && *(path1.rbegin()) != NATIVE_PATH_SEPARATOR && |
| 432 |
!path2.empty() && *(path2.begin()) != NATIVE_PATH_SEPARATOR) |
| 433 |
? path1 + NATIVE_PATH_SEPARATOR + path2 |
| 434 |
: path1 + path2; |
| 435 |
} |
| 436 |
|
| 437 |
/** |
| 438 |
* Returns a hex string representation of the binary data being passed. |
| 439 |
*/ |
| 440 |
inline std::string binToHexStr(const void* pData, size_t sz) { |
| 441 |
std::string s; |
| 442 |
for (size_t i = 0; i < sz; ++i) { |
| 443 |
s += strPrint("%02x", ((const char*)pData)[i]); |
| 444 |
} |
| 445 |
return s; |
| 446 |
} |
| 447 |
|
| 448 |
#endif // __LIBGIG_HELPER_H__ |
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