src/vector/cl_GV_number.cc

   1 // cl_make_heap_GV_number().
   2
   3 // General includes.
   4 #include "base/cl_sysdep.h"
   5
   6 // Specification.
   7 #include "cln/GV_number.h"
   8
   9
  10 // Implementation.
  11
  12 #include "cln/exception.h"
  13 #include "base/cl_offsetof.h"
  14
  15 namespace cln {
  16
  17 static void cl_gvector_number_destructor (cl_heap* pointer)
  18 {
  19         (*(cl_heap_GV_number*)pointer).~cl_heap_GV_number();
  20 }
  21
  22 // XXX: this ought to be const, but it would be impossible to register
  23 // the printing function (in cl_GV_number_debug.cc)
  24 cl_class& cl_class_gvector_number()
  25 {
  26         static cl_class instance = {
  27                 cl_gvector_number_destructor,
  28                 0
  29         };
  30         return instance;
  31 }
  32
  33 static inline cl_heap_GV_number * outcast (cl_GV_inner<cl_number>* vec)
  34 {
  35         return (cl_heap_GV_number *)((char *) vec - offsetof(cl_heap_GV_number,v));
  36 }
  37 static inline const cl_heap_GV_number * outcast (const cl_GV_inner<cl_number>* vec)
  38 {
  39         return (const cl_heap_GV_number *)((const char *) vec - offsetof(cl_heap_GV_number,v));
  40 }
  41
  42
  43 // Vectors of numbers.
  44
  45 struct cl_heap_GV_number_general : public cl_heap_GV_number {
  46         cl_number data[1];
  47         // Standard allocation disabled.
  48         void* operator new (size_t size) = delete;
  49         // Standard deallocation disabled.
  50         void operator delete (void* ptr) = delete;
  51         // No default constructor.
  52         cl_heap_GV_number_general ();
  53 };
  54
  55 static const cl_number general_element (const cl_GV_inner<cl_number>* vec, std::size_t index)
  56 {
  57         return ((const cl_heap_GV_number_general *) outcast(vec))->data[index];
  58 }
  59
  60 static void general_set_element (cl_GV_inner<cl_number>* vec, std::size_t index, const cl_number& x)
  61 {
  62         ((cl_heap_GV_number_general *) outcast(vec))->data[index] = x;
  63 }
  64
  65 static void general_do_delete (cl_GV_inner<cl_number>* vec)
  66 {
  67         cl_heap_GV_number_general* hv = (cl_heap_GV_number_general *) outcast(vec);
  68         std::size_t len = hv->v.size();
  69         for (std::size_t i = 0; i < len; i++)
  70                 hv->data[i].~cl_number();
  71 }
  72
  73 static void general_copy_elements (const cl_GV_inner<cl_number>* srcvec, std::size_t srcindex, cl_GV_inner<cl_number>* destvec, std::size_t destindex, std::size_t count)
  74 {
  75         if (count > 0) {
  76                 const cl_heap_GV_number_general* srcv =
  77                   (const cl_heap_GV_number_general *) outcast(srcvec);
  78                 cl_heap_GV_number_general* destv =
  79                   (cl_heap_GV_number_general *) outcast(destvec);
  80                 std::size_t srclen = srcv->v.size();
  81                 std::size_t destlen = destv->v.size();
  82                 if (!(srcindex <= srcindex+count && srcindex+count <= srclen))
  83                         throw runtime_exception();
  84                 if (!(destindex <= destindex+count && destindex+count <= destlen))
  85                         throw runtime_exception();
  86                 do {
  87                         destv->data[destindex++] = srcv->data[srcindex++];
  88                 } while (--count > 0);
  89         }
  90 }
  91
  92
  93 cl_heap_GV_number* cl_make_heap_GV_number (std::size_t len)
  94 {
  95         static cl_GV_vectorops<cl_number> general_vectorops = {
  96                 general_element,
  97                 general_set_element,
  98                 general_do_delete,
  99                 general_copy_elements
 100         };
 101
 102         cl_heap_GV_number_general* hv = (cl_heap_GV_number_general*) malloc_hook(offsetofa(cl_heap_GV_number_general,data)+sizeof(cl_number)*len);
 103         hv->refcount = 1;
 104         hv->type = &cl_class_gvector_number();
 105         new (&hv->v) cl_GV_inner<cl_number> (len,&general_vectorops);
 106         for (std::size_t i = 0; i < len; i++)
 107                 init1(cl_number, hv->data[i]) ();
 108         return hv;
 109 }
 110
 111 // An empty vector.
 112 const cl_GV_number cl_null_GV_number = cl_null_GV_number;
 113
 114 int cl_GV_number_init_helper::count = 0;
 115
 116 cl_GV_number_init_helper::cl_GV_number_init_helper()
 117 {
 118         if (count++ == 0)
 119                 new ((void *)&cl_null_GV_number) cl_GV_number((std::size_t)0);
 120 }
 121
 122 cl_GV_number_init_helper::~cl_GV_number_init_helper()
 123 {
 124         if (--count == 0) {
 125                 // Nothing to clean up
 126         }
 127 }
 128
 129 }  // namespace cln
 130