lib/buffer.h

   1
   2 #define BUFFER(type)            struct { type *data; uint used, size; }
   3
   4 #define BUFFER_SIZE(v)          ((v).size * sizeof(* (v).data))
   5
   6 #define BUFFER_INIT(v,pool,isize)                                       \
   7   ({                                                                    \
   8     (v).used = 0;                                                       \
   9     (v).size = (isize);                                                 \
  10     (v).data = mb_alloc(pool, BUFFER_SIZE(v));                          \
  11   })
  12
  13 #define BUFFER_SET(v,nsize)                                             \
  14   ({                                                                    \
  15     (v).used = (nsize);                                                 \
  16     if ((v).used > (v).size)                                            \
  17       buffer_realloc((void **) &((v).data), &((v).size), (v).used, sizeof(* (v).data)); \
  18   })
  19
  20 #define BUFFER_INC(v,step)                                              \
  21   ({                                                                    \
  22     uint _o = (v).used;                                                 \
  23     BUFFER_SET(v, (v).used + (step));                                   \
  24     (v).data + _o;                                                      \
  25   })
  26
  27 #define BUFFER_DEC(v,step)      ({ (v).used -= (step); })
  28
  29 #define BUFFER_PUSH(v)          (*BUFFER_INC(v,1))
  30
  31 #define BUFFER_POP(v)           BUFFER_DEC(v,1)
  32
  33 #define BUFFER_FLUSH(v)         ({ (v).used = 0; })
  34
  35