source/modules/water/common.hpp

   1 /*
   2  * Cross-platform C++ library for Carla, based on Juce v4
   3  * Copyright (C) 2015 ROLI Ltd.
   4  * Copyright (C) 2017-2023 Filipe Coelho <falktx@falktx.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of
   9  * the License, or any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * For a full copy of the GNU General Public License see the doc/GPL.txt file.
  17  */
  18
  19 #pragma once
  20
  21 #include "maths/MathsFunctions.h"
  22 #include "misc/Result.h"
  23
  24 #ifdef CARLA_OS_MAC
  25 # include "text/String.h"
  26 # import <Foundation/NSAutoreleasePool.h>
  27 # import <Foundation/NSString.h>
  28 #endif
  29
  30 #include <cerrno>
  31
  32 #ifndef CARLA_PROPER_CPP11_SUPPORT
  33 namespace std {
  34 using strerror;
  35 }
  36 #endif
  37
  38 //==============================================================================
  39 namespace water
  40 {
  41
  42 #ifdef CARLA_OS_WIN
  43 static inline
  44 Result getResultForLastError()
  45 {
  46     CHAR messageBuffer [256] = { 0 };
  47
  48     FormatMessageA (FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
  49                     nullptr, GetLastError(), MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
  50                     messageBuffer, (DWORD) numElementsInArray (messageBuffer) - 1, nullptr);
  51
  52     return Result::fail (messageBuffer);
  53 }
  54
  55 static inline
  56 int64 water_fileSetPosition (void* handle, int64 pos)
  57 {
  58     LARGE_INTEGER li;
  59     li.QuadPart = pos;
  60     li.LowPart = SetFilePointer ((HANDLE) handle, (LONG) li.LowPart, &li.HighPart, FILE_BEGIN);  // (returns -1 if it fails)
  61     return li.QuadPart;
  62 }
  63
  64 HINSTANCE getCurrentModuleInstanceHandle() noexcept;
  65 #else
  66 static inline
  67 Result getResultForErrno()
  68 {
  69     return Result::fail (std::strerror (errno));
  70 }
  71
  72 static inline
  73 int getFD (void* handle) noexcept        { return (int) (pointer_sized_int) handle; }
  74
  75 static inline
  76 void* fdToVoidPointer (int fd) noexcept  { return (void*) (pointer_sized_int) fd; }
  77
  78 static inline
  79 int64 water_fileSetPosition (void* handle, int64 pos)
  80 {
  81     if (handle != nullptr && lseek (getFD (handle), pos, SEEK_SET) == pos)
  82         return pos;
  83
  84     return -1;
  85 }
  86 #endif
  87
  88 #ifdef CARLA_OS_MAC
  89 static inline
  90 String nsStringToWater (NSString* s)
  91 {
  92     return CharPointer_UTF8 ([s UTF8String]);
  93 }
  94
  95 static inline
  96 NSString* waterStringToNS (const String& s)
  97 {
  98     return [NSString stringWithUTF8String: s.toUTF8()];
  99 }
 100
 101 class AutoNSAutoreleasePool {
 102 public:
 103     AutoNSAutoreleasePool() : pool([NSAutoreleasePool new]) {}
 104     ~AutoNSAutoreleasePool() { [pool drain]; }
 105
 106 private:
 107     NSAutoreleasePool* const pool;
 108 };
 109 #endif
 110
 111 }