Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 325 insertions, 0 deletions

diff --git a/external/clew/source/clew.c b/external/clew/source/clew.c
new file mode 100644
index 000000000..4ed80035d
--- /dev/null
+++ b/external/clew/source/clew.c
@@ -0,0 +1,325 @@
+//////////////////////////////////////////////////////////////////////////
+//  Copyright (c) 2009-2011 Organic Vectory B.V.
+//  Written by George van Venrooij
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  (See accompanying file license.txt)
+//////////////////////////////////////////////////////////////////////////
+
+#include "clew/clew.h"
+
+//! \file clew.c
+//! \brief OpenCL run-time loader source
+
+#ifndef CLCC_GENERATE_DOCUMENTATION
+    #ifdef _WIN32
+        #define WIN32_LEAN_AND_MEAN
+        #include <windows.h>
+
+        typedef HMODULE             CLCC_DYNLIB_HANDLE;
+
+        #define CLCC_DYNLIB_OPEN    LoadLibrary
+        #define CLCC_DYNLIB_CLOSE   FreeLibrary
+        #define CLCC_DYNLIB_IMPORT  GetProcAddress
+    #else
+        #include <dlfcn.h>
+
+        typedef void*                   CLCC_DYNLIB_HANDLE;
+
+        #define CLCC_DYNLIB_OPEN(path)  dlopen(path, RTLD_NOW | RTLD_GLOBAL)
+        #define CLCC_DYNLIB_CLOSE       dlclose
+        #define CLCC_DYNLIB_IMPORT      dlsym
+    #endif
+#else
+    //typedef implementation_defined  CLCC_DYNLIB_HANDLE;
+    //#define CLCC_DYNLIB_OPEN(path)  implementation_defined
+    //#define CLCC_DYNLIB_CLOSE       implementation_defined
+    //#define CLCC_DYNLIB_IMPORT      implementation_defined
+#endif
+
+#include <stdlib.h>
+
+//! \brief module handle
+static CLCC_DYNLIB_HANDLE module = NULL;
+
+//  Variables holding function entry points
+#ifndef CLCC_GENERATE_DOCUMENTATION
+PFNCLGETPLATFORMIDS                 __clewGetPlatformIDs                = NULL;
+PFNCLGETPLATFORMINFO                __clewGetPlatformInfo               = NULL;
+PFNCLGETDEVICEIDS                   __clewGetDeviceIDs                  = NULL;
+PFNCLGETDEVICEINFO                  __clewGetDeviceInfo                 = NULL;
+PFNCLCREATECONTEXT                  __clewCreateContext                 = NULL;
+PFNCLCREATECONTEXTFROMTYPE          __clewCreateContextFromType         = NULL;
+PFNCLRETAINCONTEXT                  __clewRetainContext                 = NULL;
+PFNCLRELEASECONTEXT                 __clewReleaseContext                = NULL;
+PFNCLGETCONTEXTINFO                 __clewGetContextInfo                = NULL;
+PFNCLCREATECOMMANDQUEUE             __clewCreateCommandQueue            = NULL;
+PFNCLRETAINCOMMANDQUEUE             __clewRetainCommandQueue            = NULL;
+PFNCLRELEASECOMMANDQUEUE            __clewReleaseCommandQueue           = NULL;
+PFNCLGETCOMMANDQUEUEINFO            __clewGetCommandQueueInfo           = NULL;
+PFNCLSETCOMMANDQUEUEPROPERTY        __clewSetCommandQueueProperty       = NULL;
+PFNCLCREATEBUFFER                   __clewCreateBuffer                  = NULL;
+PFNCLCREATEIMAGE2D                  __clewCreateImage2D                 = NULL;
+PFNCLCREATEIMAGE3D                  __clewCreateImage3D                 = NULL;
+PFNCLRETAINMEMOBJECT                __clewRetainMemObject               = NULL;
+PFNCLRELEASEMEMOBJECT               __clewReleaseMemObject              = NULL;
+PFNCLGETSUPPORTEDIMAGEFORMATS       __clewGetSupportedImageFormats      = NULL;
+PFNCLGETMEMOBJECTINFO               __clewGetMemObjectInfo              = NULL;
+PFNCLGETIMAGEINFO                   __clewGetImageInfo                  = NULL;
+PFNCLCREATESAMPLER                  __clewCreateSampler                 = NULL;
+PFNCLRETAINSAMPLER                  __clewRetainSampler                 = NULL;
+PFNCLRELEASESAMPLER                 __clewReleaseSampler                = NULL;
+PFNCLGETSAMPLERINFO                 __clewGetSamplerInfo                = NULL;
+PFNCLCREATEPROGRAMWITHSOURCE        __clewCreateProgramWithSource       = NULL;
+PFNCLCREATEPROGRAMWITHBINARY        __clewCreateProgramWithBinary       = NULL;
+PFNCLRETAINPROGRAM                  __clewRetainProgram                 = NULL;
+PFNCLRELEASEPROGRAM                 __clewReleaseProgram                = NULL;
+PFNCLBUILDPROGRAM                   __clewBuildProgram                  = NULL;
+PFNCLUNLOADCOMPILER                 __clewUnloadCompiler                = NULL;
+PFNCLGETPROGRAMINFO                 __clewGetProgramInfo                = NULL;
+PFNCLGETPROGRAMBUILDINFO            __clewGetProgramBuildInfo           = NULL;
+PFNCLCREATEKERNEL                   __clewCreateKernel                  = NULL;
+PFNCLCREATEKERNELSINPROGRAM         __clewCreateKernelsInProgram        = NULL;
+PFNCLRETAINKERNEL                   __clewRetainKernel                  = NULL;
+PFNCLRELEASEKERNEL                  __clewReleaseKernel                 = NULL;
+PFNCLSETKERNELARG                   __clewSetKernelArg                  = NULL;
+PFNCLGETKERNELINFO                  __clewGetKernelInfo                 = NULL;
+PFNCLGETKERNELWORKGROUPINFO         __clewGetKernelWorkGroupInfo        = NULL;
+PFNCLWAITFOREVENTS                  __clewWaitForEvents                 = NULL;
+PFNCLGETEVENTINFO                   __clewGetEventInfo                  = NULL;
+PFNCLRETAINEVENT                    __clewRetainEvent                   = NULL;
+PFNCLRELEASEEVENT                   __clewReleaseEvent                  = NULL;
+PFNCLGETEVENTPROFILINGINFO          __clewGetEventProfilingInfo         = NULL;
+PFNCLFLUSH                          __clewFlush                         = NULL;
+PFNCLFINISH                         __clewFinish                        = NULL;
+PFNCLENQUEUEREADBUFFER              __clewEnqueueReadBuffer             = NULL;
+PFNCLENQUEUEWRITEBUFFER             __clewEnqueueWriteBuffer            = NULL;
+PFNCLENQUEUECOPYBUFFER              __clewEnqueueCopyBuffer             = NULL;
+PFNCLENQUEUEREADIMAGE               __clewEnqueueReadImage              = NULL;
+PFNCLENQUEUEWRITEIMAGE              __clewEnqueueWriteImage             = NULL;
+PFNCLENQUEUECOPYIMAGE               __clewEnqueueCopyImage              = NULL;
+PFNCLENQUEUECOPYIMAGETOBUFFER       __clewEnqueueCopyImageToBuffer      = NULL;
+PFNCLENQUEUECOPYBUFFERTOIMAGE       __clewEnqueueCopyBufferToImage      = NULL;
+PFNCLENQUEUEMAPBUFFER               __clewEnqueueMapBuffer              = NULL;
+PFNCLENQUEUEMAPIMAGE                __clewEnqueueMapImage               = NULL;
+PFNCLENQUEUEUNMAPMEMOBJECT          __clewEnqueueUnmapMemObject         = NULL;
+PFNCLENQUEUENDRANGEKERNEL           __clewEnqueueNDRangeKernel          = NULL;
+PFNCLENQUEUETASK                    __clewEnqueueTask                   = NULL;
+PFNCLENQUEUENATIVEKERNEL            __clewEnqueueNativeKernel           = NULL;
+PFNCLENQUEUEMARKER                  __clewEnqueueMarker                 = NULL;
+PFNCLENQUEUEWAITFOREVENTS           __clewEnqueueWaitForEvents          = NULL;
+PFNCLENQUEUEBARRIER                 __clewEnqueueBarrier                = NULL;
+PFNCLGETEXTENSIONFUNCTIONADDRESS    __clewGetExtensionFunctionAddress   = NULL;
+#endif  //  CLCC_GENERATE_DOCUMENTATION
+
+
+//! \brief Unloads OpenCL dynamic library, should not be called directly
+static void clewExit(void)
+{
+    if (module != NULL)
+    {
+        //  Ignore errors
+        CLCC_DYNLIB_CLOSE(module);
+        module = NULL;
+    }
+}
+
+#define CLEW_CHECK_FUNCTION(f)              \
+    if ((f) == NULL)                        \
+    {                                       \
+        CLCC_DYNLIB_CLOSE(module);          \
+        module = NULL;                      \
+        return CLEW_ERROR_IMPORT_FAILED;    \
+    }                                       \
+
+//! \param path path to dynamic library to load
+//! \return CLEW_ERROR_OPEN_FAILED if the library could not be opened
+//! CLEW_ERROR_ATEXIT_FAILED if atexit(clewExit) failed
+//! CLEW_SUCCESS when the library was successfully loaded
+int clewInit(const char* path)
+{
+    int error = 0;
+
+    //  Check if already initialized
+    if (module != NULL)
+    {
+        return CLEW_SUCCESS;
+    }
+
+    //  Load library
+    module = CLCC_DYNLIB_OPEN(path);
+
+    //  Check for errors
+    if (module == NULL)
+    {
+        return CLEW_ERROR_OPEN_FAILED;
+    }
+
+    //  Set unloading
+    error = atexit(clewExit);
+
+    if (error)
+    {
+        //  Failure queueing atexit, shutdown with error
+        CLCC_DYNLIB_CLOSE(module);
+        module = NULL;
+
+        return CLEW_ERROR_ATEXIT_FAILED;
+    }
+
+    //  Determine function entry-points
+    CLEW_CHECK_FUNCTION(__clewGetPlatformIDs                = (PFNCLGETPLATFORMIDS              )CLCC_DYNLIB_IMPORT(module, "clGetPlatformIDs"));
+    CLEW_CHECK_FUNCTION(__clewGetPlatformInfo               = (PFNCLGETPLATFORMINFO             )CLCC_DYNLIB_IMPORT(module, "clGetPlatformInfo"));
+    CLEW_CHECK_FUNCTION(__clewGetDeviceIDs                  = (PFNCLGETDEVICEIDS                )CLCC_DYNLIB_IMPORT(module, "clGetDeviceIDs"));
+    CLEW_CHECK_FUNCTION(__clewGetDeviceInfo                 = (PFNCLGETDEVICEINFO               )CLCC_DYNLIB_IMPORT(module, "clGetDeviceInfo"));
+    CLEW_CHECK_FUNCTION(__clewCreateContext                 = (PFNCLCREATECONTEXT               )CLCC_DYNLIB_IMPORT(module, "clCreateContext"));
+    CLEW_CHECK_FUNCTION(__clewCreateContextFromType         = (PFNCLCREATECONTEXTFROMTYPE       )CLCC_DYNLIB_IMPORT(module, "clCreateContextFromType"));
+    CLEW_CHECK_FUNCTION(__clewRetainContext                 = (PFNCLRETAINCONTEXT               )CLCC_DYNLIB_IMPORT(module, "clRetainContext"));
+    CLEW_CHECK_FUNCTION(__clewReleaseContext                = (PFNCLRELEASECONTEXT              )CLCC_DYNLIB_IMPORT(module, "clReleaseContext"));
+    CLEW_CHECK_FUNCTION(__clewGetContextInfo                = (PFNCLGETCONTEXTINFO              )CLCC_DYNLIB_IMPORT(module, "clGetContextInfo"));
+    CLEW_CHECK_FUNCTION(__clewCreateCommandQueue            = (PFNCLCREATECOMMANDQUEUE          )CLCC_DYNLIB_IMPORT(module, "clCreateCommandQueue"));
+    CLEW_CHECK_FUNCTION(__clewRetainCommandQueue            = (PFNCLRETAINCOMMANDQUEUE          )CLCC_DYNLIB_IMPORT(module, "clRetainCommandQueue"));
+    CLEW_CHECK_FUNCTION(__clewReleaseCommandQueue           = (PFNCLRELEASECOMMANDQUEUE         )CLCC_DYNLIB_IMPORT(module, "clReleaseCommandQueue"));
+    CLEW_CHECK_FUNCTION(__clewGetCommandQueueInfo           = (PFNCLGETCOMMANDQUEUEINFO         )CLCC_DYNLIB_IMPORT(module, "clGetCommandQueueInfo"));
+    CLEW_CHECK_FUNCTION(__clewSetCommandQueueProperty       = (PFNCLSETCOMMANDQUEUEPROPERTY     )CLCC_DYNLIB_IMPORT(module, "clSetCommandQueueProperty"));
+    CLEW_CHECK_FUNCTION(__clewCreateBuffer                  = (PFNCLCREATEBUFFER                )CLCC_DYNLIB_IMPORT(module, "clCreateBuffer"));
+    CLEW_CHECK_FUNCTION(__clewCreateImage2D                 = (PFNCLCREATEIMAGE2D               )CLCC_DYNLIB_IMPORT(module, "clCreateImage2D"));
+    CLEW_CHECK_FUNCTION(__clewCreateImage3D                 = (PFNCLCREATEIMAGE3D               )CLCC_DYNLIB_IMPORT(module, "clCreateImage3D"));
+    CLEW_CHECK_FUNCTION(__clewRetainMemObject               = (PFNCLRETAINMEMOBJECT             )CLCC_DYNLIB_IMPORT(module, "clRetainMemObject"));
+    CLEW_CHECK_FUNCTION(__clewReleaseMemObject              = (PFNCLRELEASEMEMOBJECT            )CLCC_DYNLIB_IMPORT(module, "clReleaseMemObject"));
+    CLEW_CHECK_FUNCTION(__clewGetSupportedImageFormats      = (PFNCLGETSUPPORTEDIMAGEFORMATS    )CLCC_DYNLIB_IMPORT(module, "clGetSupportedImageFormats"));
+    CLEW_CHECK_FUNCTION(__clewGetMemObjectInfo              = (PFNCLGETMEMOBJECTINFO            )CLCC_DYNLIB_IMPORT(module, "clGetMemObjectInfo"));
+    CLEW_CHECK_FUNCTION(__clewGetImageInfo                  = (PFNCLGETIMAGEINFO                )CLCC_DYNLIB_IMPORT(module, "clGetImageInfo"));
+    CLEW_CHECK_FUNCTION(__clewCreateSampler                 = (PFNCLCREATESAMPLER               )CLCC_DYNLIB_IMPORT(module, "clCreateSampler"));
+    CLEW_CHECK_FUNCTION(__clewRetainSampler                 = (PFNCLRETAINSAMPLER               )CLCC_DYNLIB_IMPORT(module, "clRetainSampler"));
+    CLEW_CHECK_FUNCTION(__clewReleaseSampler                = (PFNCLRELEASESAMPLER              )CLCC_DYNLIB_IMPORT(module, "clReleaseSampler"));
+    CLEW_CHECK_FUNCTION(__clewGetSamplerInfo                = (PFNCLGETSAMPLERINFO              )CLCC_DYNLIB_IMPORT(module, "clGetSamplerInfo"));
+    CLEW_CHECK_FUNCTION(__clewCreateProgramWithSource       = (PFNCLCREATEPROGRAMWITHSOURCE     )CLCC_DYNLIB_IMPORT(module, "clCreateProgramWithSource"));
+    CLEW_CHECK_FUNCTION(__clewCreateProgramWithBinary       = (PFNCLCREATEPROGRAMWITHBINARY     )CLCC_DYNLIB_IMPORT(module, "clCreateProgramWithBinary"));
+    CLEW_CHECK_FUNCTION(__clewRetainProgram                 = (PFNCLRETAINPROGRAM               )CLCC_DYNLIB_IMPORT(module, "clRetainProgram"));
+    CLEW_CHECK_FUNCTION(__clewReleaseProgram                = (PFNCLRELEASEPROGRAM              )CLCC_DYNLIB_IMPORT(module, "clReleaseProgram"));
+    CLEW_CHECK_FUNCTION(__clewBuildProgram                  = (PFNCLBUILDPROGRAM                )CLCC_DYNLIB_IMPORT(module, "clBuildProgram"));
+    CLEW_CHECK_FUNCTION(__clewUnloadCompiler                = (PFNCLUNLOADCOMPILER              )CLCC_DYNLIB_IMPORT(module, "clUnloadCompiler"));
+    CLEW_CHECK_FUNCTION(__clewGetProgramInfo                = (PFNCLGETPROGRAMINFO              )CLCC_DYNLIB_IMPORT(module, "clGetProgramInfo"));
+    CLEW_CHECK_FUNCTION(__clewGetProgramBuildInfo           = (PFNCLGETPROGRAMBUILDINFO         )CLCC_DYNLIB_IMPORT(module, "clGetProgramBuildInfo"));
+    CLEW_CHECK_FUNCTION(__clewCreateKernel                  = (PFNCLCREATEKERNEL                )CLCC_DYNLIB_IMPORT(module, "clCreateKernel"));
+    CLEW_CHECK_FUNCTION(__clewCreateKernelsInProgram        = (PFNCLCREATEKERNELSINPROGRAM      )CLCC_DYNLIB_IMPORT(module, "clCreateKernelsInProgram"));
+    CLEW_CHECK_FUNCTION(__clewRetainKernel                  = (PFNCLRETAINKERNEL                )CLCC_DYNLIB_IMPORT(module, "clRetainKernel"));
+    CLEW_CHECK_FUNCTION(__clewReleaseKernel                 = (PFNCLRELEASEKERNEL               )CLCC_DYNLIB_IMPORT(module, "clReleaseKernel"));
+    CLEW_CHECK_FUNCTION(__clewSetKernelArg                  = (PFNCLSETKERNELARG                )CLCC_DYNLIB_IMPORT(module, "clSetKernelArg"));
+    CLEW_CHECK_FUNCTION(__clewGetKernelInfo                 = (PFNCLGETKERNELINFO               )CLCC_DYNLIB_IMPORT(module, "clGetKernelInfo"));
+    CLEW_CHECK_FUNCTION(__clewGetKernelWorkGroupInfo        = (PFNCLGETKERNELWORKGROUPINFO      )CLCC_DYNLIB_IMPORT(module, "clGetKernelWorkGroupInfo"));
+    CLEW_CHECK_FUNCTION(__clewWaitForEvents                 = (PFNCLWAITFOREVENTS               )CLCC_DYNLIB_IMPORT(module, "clWaitForEvents"));
+    CLEW_CHECK_FUNCTION(__clewGetEventInfo                  = (PFNCLGETEVENTINFO                )CLCC_DYNLIB_IMPORT(module, "clGetEventInfo"));
+    CLEW_CHECK_FUNCTION(__clewRetainEvent                   = (PFNCLRETAINEVENT                 )CLCC_DYNLIB_IMPORT(module, "clRetainEvent"));
+    CLEW_CHECK_FUNCTION(__clewReleaseEvent                  = (PFNCLRELEASEEVENT                )CLCC_DYNLIB_IMPORT(module, "clReleaseEvent"));
+    CLEW_CHECK_FUNCTION(__clewGetEventProfilingInfo         = (PFNCLGETEVENTPROFILINGINFO       )CLCC_DYNLIB_IMPORT(module, "clGetEventProfilingInfo"));
+    CLEW_CHECK_FUNCTION(__clewFlush                         = (PFNCLFLUSH                       )CLCC_DYNLIB_IMPORT(module, "clFlush"));
+    CLEW_CHECK_FUNCTION(__clewFinish                        = (PFNCLFINISH                      )CLCC_DYNLIB_IMPORT(module, "clFinish"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueReadBuffer             = (PFNCLENQUEUEREADBUFFER           )CLCC_DYNLIB_IMPORT(module, "clEnqueueReadBuffer"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueWriteBuffer            = (PFNCLENQUEUEWRITEBUFFER          )CLCC_DYNLIB_IMPORT(module, "clEnqueueWriteBuffer"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueCopyBuffer             = (PFNCLENQUEUECOPYBUFFER           )CLCC_DYNLIB_IMPORT(module, "clEnqueueCopyBuffer"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueReadImage              = (PFNCLENQUEUEREADIMAGE            )CLCC_DYNLIB_IMPORT(module, "clEnqueueReadImage"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueWriteImage             = (PFNCLENQUEUEWRITEIMAGE           )CLCC_DYNLIB_IMPORT(module, "clEnqueueWriteImage"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueCopyImage              = (PFNCLENQUEUECOPYIMAGE            )CLCC_DYNLIB_IMPORT(module, "clEnqueueCopyImage"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueCopyImageToBuffer      = (PFNCLENQUEUECOPYIMAGETOBUFFER    )CLCC_DYNLIB_IMPORT(module, "clEnqueueCopyImageToBuffer"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueCopyBufferToImage      = (PFNCLENQUEUECOPYBUFFERTOIMAGE    )CLCC_DYNLIB_IMPORT(module, "clEnqueueCopyBufferToImage"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueMapBuffer              = (PFNCLENQUEUEMAPBUFFER            )CLCC_DYNLIB_IMPORT(module, "clEnqueueMapBuffer"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueMapImage               = (PFNCLENQUEUEMAPIMAGE             )CLCC_DYNLIB_IMPORT(module, "clEnqueueMapImage"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueUnmapMemObject         = (PFNCLENQUEUEUNMAPMEMOBJECT       )CLCC_DYNLIB_IMPORT(module, "clEnqueueUnmapMemObject"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueNDRangeKernel          = (PFNCLENQUEUENDRANGEKERNEL        )CLCC_DYNLIB_IMPORT(module, "clEnqueueNDRangeKernel"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueTask                   = (PFNCLENQUEUETASK                 )CLCC_DYNLIB_IMPORT(module, "clEnqueueTask"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueNativeKernel           = (PFNCLENQUEUENATIVEKERNEL         )CLCC_DYNLIB_IMPORT(module, "clEnqueueNativeKernel"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueMarker                 = (PFNCLENQUEUEMARKER               )CLCC_DYNLIB_IMPORT(module, "clEnqueueMarker"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueWaitForEvents          = (PFNCLENQUEUEWAITFOREVENTS        )CLCC_DYNLIB_IMPORT(module, "clEnqueueWaitForEvents"));
+    CLEW_CHECK_FUNCTION(__clewEnqueueBarrier                = (PFNCLENQUEUEBARRIER              )CLCC_DYNLIB_IMPORT(module, "clEnqueueBarrier"));
+    CLEW_CHECK_FUNCTION(__clewGetExtensionFunctionAddress   = (PFNCLGETEXTENSIONFUNCTIONADDRESS )CLCC_DYNLIB_IMPORT(module, "clGetExtensionFunctionAddress"));
+
+    return CLEW_SUCCESS;
+}
+
+//! \param error CL error code
+//! \return a string representation of the error code
+const char* clewErrorString(cl_int error)
+{
+    static const char* strings[] =
+    {
+        // Error Codes
+          "CL_SUCCESS"                                  //   0
+        , "CL_DEVICE_NOT_FOUND"                         //  -1
+        , "CL_DEVICE_NOT_AVAILABLE"                     //  -2
+        , "CL_COMPILER_NOT_AVAILABLE"                   //  -3
+        , "CL_MEM_OBJECT_ALLOCATION_FAILURE"            //  -4
+        , "CL_OUT_OF_RESOURCES"                         //  -5
+        , "CL_OUT_OF_HOST_MEMORY"                       //  -6
+        , "CL_PROFILING_INFO_NOT_AVAILABLE"             //  -7
+        , "CL_MEM_COPY_OVERLAP"                         //  -8
+        , "CL_IMAGE_FORMAT_MISMATCH"                    //  -9
+        , "CL_IMAGE_FORMAT_NOT_SUPPORTED"               //  -10
+        , "CL_BUILD_PROGRAM_FAILURE"                    //  -11
+        , "CL_MAP_FAILURE"                              //  -12
+
+        , ""    //  -13
+        , ""    //  -14
+        , ""    //  -15
+        , ""    //  -16
+        , ""    //  -17
+        , ""    //  -18
+        , ""    //  -19
+
+        , ""    //  -20
+        , ""    //  -21
+        , ""    //  -22
+        , ""    //  -23
+        , ""    //  -24
+        , ""    //  -25
+        , ""    //  -26
+        , ""    //  -27
+        , ""    //  -28
+        , ""    //  -29
+
+        , "CL_INVALID_VALUE"                            //  -30
+        , "CL_INVALID_DEVICE_TYPE"                      //  -31
+        , "CL_INVALID_PLATFORM"                         //  -32
+        , "CL_INVALID_DEVICE"                           //  -33
+        , "CL_INVALID_CONTEXT"                          //  -34
+        , "CL_INVALID_QUEUE_PROPERTIES"                 //  -35
+        , "CL_INVALID_COMMAND_QUEUE"                    //  -36
+        , "CL_INVALID_HOST_PTR"                         //  -37
+        , "CL_INVALID_MEM_OBJECT"                       //  -38
+        , "CL_INVALID_IMAGE_FORMAT_DESCRIPTOR"          //  -39
+        , "CL_INVALID_IMAGE_SIZE"                       //  -40
+        , "CL_INVALID_SAMPLER"                          //  -41
+        , "CL_INVALID_BINARY"                           //  -42
+        , "CL_INVALID_BUILD_OPTIONS"                    //  -43
+        , "CL_INVALID_PROGRAM"                          //  -44
+        , "CL_INVALID_PROGRAM_EXECUTABLE"               //  -45
+        , "CL_INVALID_KERNEL_NAME"                      //  -46
+        , "CL_INVALID_KERNEL_DEFINITION"                //  -47
+        , "CL_INVALID_KERNEL"                           //  -48
+        , "CL_INVALID_ARG_INDEX"                        //  -49
+        , "CL_INVALID_ARG_VALUE"                        //  -50
+        , "CL_INVALID_ARG_SIZE"                         //  -51
+        , "CL_INVALID_KERNEL_ARGS"                      //  -52
+        , "CL_INVALID_WORK_DIMENSION"                   //  -53
+        , "CL_INVALID_WORK_GROUP_SIZE"                  //  -54
+        , "CL_INVALID_WORK_ITEM_SIZE"                   //  -55
+        , "CL_INVALID_GLOBAL_OFFSET"                    //  -56
+        , "CL_INVALID_EVENT_WAIT_LIST"                  //  -57
+        , "CL_INVALID_EVENT"                            //  -58
+        , "CL_INVALID_OPERATION"                        //  -59
+        , "CL_INVALID_GL_OBJECT"                        //  -60
+        , "CL_INVALID_BUFFER_SIZE"                      //  -61
+        , "CL_INVALID_MIP_LEVEL"                        //  -62
+        , "CL_INVALID_GLOBAL_WORK_SIZE"                 //  -63
+    };
+
+    if  (   (error > 0)
+        ||  (error < -63)
+        )
+    {
+        return "unknown error code (no OpenCL driver?)";
+    }
+
+    return strings[-error];
+}