Alc/vector.h

   1 #ifndef AL_VECTOR_H
   2 #define AL_VECTOR_H
   3
   4 #include <stdlib.h>
   5
   6 #include <AL/al.h>
   7
   8 #include "almalloc.h"
   9
  10
  11 #define TYPEDEF_VECTOR(T, N) typedef struct {                                 \
  12     size_t Capacity;                                                          \
  13     size_t Size;                                                              \
  14     T Data[];                                                                 \
  15 } _##N;                                                                       \
  16 typedef _##N* N;                                                              \
  17 typedef const _##N* const_##N;
  18
  19 #define VECTOR(T) struct {                                                    \
  20     size_t Capacity;                                                          \
  21     size_t Size;                                                              \
  22     T Data[];                                                                 \
  23 }*
  24
  25 #define VECTOR_INIT(_x)       do { (_x) = NULL; } while(0)
  26 #define VECTOR_INIT_STATIC()  NULL
  27 #define VECTOR_DEINIT(_x)     do { al_free((_x)); (_x) = NULL; } while(0)
  28
  29 #define VECTOR_RESIZE(_x, _s, _c) do {                                        \
  30     size_t _size = (_s);                                                      \
  31     size_t _cap = (_c);                                                       \
  32     if(_size > _cap)                                                          \
  33         _cap = _size;                                                         \
  34                                                                               \
  35     if(!(_x) && _cap == 0)                                                    \
  36         break;                                                                \
  37                                                                               \
  38     if(((_x) ? (_x)->Capacity : 0) < _cap)                                    \
  39     {                                                                         \
  40         ptrdiff_t data_offset = (_x) ? (char*)((_x)->Data) - (char*)(_x) :    \
  41                                 sizeof(*(_x));                                \
  42         size_t old_size = ((_x) ? (_x)->Size : 0);                            \
  43         void *temp;                                                           \
  44                                                                               \
  45         temp = al_calloc(16, data_offset + sizeof((_x)->Data[0])*_cap);       \
  46         assert(temp != NULL);                                                 \
  47         if((_x))                                                              \
  48             memcpy(((char*)temp)+data_offset, (_x)->Data,                     \
  49                    sizeof((_x)->Data[0])*old_size);                           \
  50                                                                               \
  51         al_free((_x));                                                        \
  52         (_x) = temp;                                                          \
  53         (_x)->Capacity = _cap;                                                \
  54     }                                                                         \
  55     (_x)->Size = _size;                                                       \
  56 } while(0)                                                                    \
  57
  58 #define VECTOR_CAPACITY(_x) ((_x) ? (_x)->Capacity : 0)
  59 #define VECTOR_SIZE(_x)     ((_x) ? (_x)->Size : 0)
  60
  61 #define VECTOR_BEGIN(_x) ((_x) ? (_x)->Data + 0 : NULL)
  62 #define VECTOR_END(_x)   ((_x) ? (_x)->Data + (_x)->Size : NULL)
  63
  64 #define VECTOR_PUSH_BACK(_x, _obj) do {      \
  65     size_t _pbsize = VECTOR_SIZE(_x)+1;      \
  66     VECTOR_RESIZE(_x, _pbsize, _pbsize);     \
  67     (_x)->Data[(_x)->Size-1] = (_obj);       \
  68 } while(0)
  69 #define VECTOR_POP_BACK(_x) ((void)((_x)->Size--))
  70
  71 #define VECTOR_BACK(_x)  ((_x)->Data[(_x)->Size-1])
  72 #define VECTOR_FRONT(_x) ((_x)->Data[0])
  73
  74 #define VECTOR_ELEM(_x, _o) ((_x)->Data[(_o)])
  75
  76 #define VECTOR_FOR_EACH(_t, _x, _f)  do {                                     \
  77     _t *_iter = VECTOR_BEGIN((_x));                                           \
  78     _t *_end = VECTOR_END((_x));                                              \
  79     for(;_iter != _end;++_iter)                                               \
  80         _f(_iter);                                                            \
  81 } while(0)
  82
  83 #define VECTOR_FIND_IF(_i, _t, _x, _f)  do {                                  \
  84     _t *_iter = VECTOR_BEGIN((_x));                                           \
  85     _t *_end = VECTOR_END((_x));                                              \
  86     for(;_iter != _end;++_iter)                                               \
  87     {                                                                         \
  88         if(_f(_iter))                                                         \
  89             break;                                                            \
  90     }                                                                         \
  91     (_i) = _iter;                                                             \
  92 } while(0)
  93
  94 #endif /* AL_VECTOR_H */