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 #if (defined(__mips__) || defined(__mips64__)) && !defined(__GNUC__) // workaround SGI CC bug
  20         (*(cl_heap_GV_number*)pointer).~cl_heap_GV();
  21 #else
  22         (*(cl_heap_GV_number*)pointer).~cl_heap_GV_number();
  23 #endif
  24 }
  25
  26 // XXX: this ought to be const, but it would be impossible to register
  27 // the printing function (in cl_GV_number_debug.cc)
  28 cl_class& cl_class_gvector_number()
  29 {
  30         static cl_class instance = {
  31                 cl_gvector_number_destructor,
  32                 0
  33         };
  34         return instance;
  35 }
  36
  37 static inline cl_heap_GV_number * outcast (cl_GV_inner<cl_number>* vec)
  38 {
  39         return (cl_heap_GV_number *)((char *) vec - offsetof(cl_heap_GV_number,v));
  40 }
  41 static inline const cl_heap_GV_number * outcast (const cl_GV_inner<cl_number>* vec)
  42 {
  43         return (const cl_heap_GV_number *)((const char *) vec - offsetof(cl_heap_GV_number,v));
  44 }
  45
  46
  47 // Vectors of numbers.
  48
  49 struct cl_heap_GV_number_general : public cl_heap_GV_number {
  50         cl_number data[1];
  51         // Standard allocation disabled.
  52         void* operator new (size_t size) { unused size; throw runtime_exception(); }
  53         // Standard deallocation disabled.
  54         void operator delete (void* ptr) { unused ptr; throw runtime_exception(); }
  55         // No default constructor.
  56         cl_heap_GV_number_general ();
  57 };
  58
  59 static const cl_number general_element (const cl_GV_inner<cl_number>* vec, std::size_t index)
  60 {
  61         return ((const cl_heap_GV_number_general *) outcast(vec))->data[index];
  62 }
  63
  64 static void general_set_element (cl_GV_inner<cl_number>* vec, std::size_t index, const cl_number& x)
  65 {
  66         ((cl_heap_GV_number_general *) outcast(vec))->data[index] = x;
  67 }
  68
  69 static void general_do_delete (cl_GV_inner<cl_number>* vec)
  70 {
  71         cl_heap_GV_number_general* hv = (cl_heap_GV_number_general *) outcast(vec);
  72         std::size_t len = hv->v.size();
  73         for (std::size_t i = 0; i < len; i++)
  74                 hv->data[i].~cl_number();
  75 }
  76
  77 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)
  78 {
  79         if (count > 0) {
  80                 const cl_heap_GV_number_general* srcv =
  81                   (const cl_heap_GV_number_general *) outcast(srcvec);
  82                 cl_heap_GV_number_general* destv =
  83                   (cl_heap_GV_number_general *) outcast(destvec);
  84                 std::size_t srclen = srcv->v.size();
  85                 std::size_t destlen = destv->v.size();
  86                 if (!(srcindex <= srcindex+count && srcindex+count <= srclen))
  87                         throw runtime_exception();
  88                 if (!(destindex <= destindex+count && destindex+count <= destlen))
  89                         throw runtime_exception();
  90                 do {
  91                         destv->data[destindex++] = srcv->data[srcindex++];
  92                 } while (--count > 0);
  93         }
  94 }
  95
  96
  97 cl_heap_GV_number* cl_make_heap_GV_number (std::size_t len)
  98 {
  99         static cl_GV_vectorops<cl_number> general_vectorops = {
 100                 general_element,
 101                 general_set_element,
 102                 general_do_delete,
 103                 general_copy_elements
 104         };
 105
 106         cl_heap_GV_number_general* hv = (cl_heap_GV_number_general*) malloc_hook(offsetofa(cl_heap_GV_number_general,data)+sizeof(cl_number)*len);
 107         hv->refcount = 1;
 108         hv->type = &cl_class_gvector_number();
 109         new (&hv->v) cl_GV_inner<cl_number> (len,&general_vectorops);
 110         for (std::size_t i = 0; i < len; i++)
 111                 init1(cl_number, hv->data[i]) ();
 112         return hv;
 113 }
 114
 115 // An empty vector.
 116 const cl_GV_number cl_null_GV_number = cl_null_GV_number;
 117
 118 int cl_GV_number_init_helper::count = 0;
 119
 120 cl_GV_number_init_helper::cl_GV_number_init_helper()
 121 {
 122         if (count++ == 0)
 123                 new ((void *)&cl_null_GV_number) cl_GV_number((std::size_t)0);
 124 }
 125
 126 cl_GV_number_init_helper::~cl_GV_number_init_helper()
 127 {
 128         if (--count == 0) {
 129                 // Nothing to clean up
 130         }
 131 }
 132
 133 }  // namespace cln
 134