vec.h

   1 #define VEC_STRUCT(typename, inttype) \
   2 struct typename { \
   3         inttype *buf; \
   4         size_t len, alen; \
   5 }
   6
   7 #define VEC_INIT(ctl) memset(&ctl, 0, sizeof(ctl))
   8
   9 #define VEC_ADD(ctl, val) { \
  10         if (!(ctl).alen) { \
  11                 (ctl).alen = 8; \
  12                 (ctl).buf = malloc(8 * sizeof(val)); \
  13         } else if ((ctl).len >= (ctl).alen) { \
  14                 (ctl).alen *= 2; \
  15                 (ctl).buf = realloc((ctl).buf, (ctl).alen * sizeof(val)); \
  16         } \
  17         (ctl).buf[(ctl).len++] = val; \
  18 }
  19
  20 #define VEC_ADDN(ctl, valt, n) { \
  21         if (!(ctl).alen) { \
  22                 (ctl).alen = 8; \
  23                 (ctl).buf = malloc(8 * sizeof(valt)); \
  24         } \
  25         size_t nlen = (ctl).alen; \
  26         while ((ctl).len + n > nlen) \
  27                 nlen *= 2; \
  28         if (nlen > (ctl).alen) { \
  29                 (ctl).alen = nlen; \
  30                 (ctl).buf = realloc((ctl).buf, nlen * sizeof(valt)); \
  31         } \
  32         (ctl).len += n; \
  33 }
  34
  35 #define VEC_FREE(ctl) { free((ctl).buf); memset(&(ctl), 0, sizeof((ctl))); }
  36
  37 #define VEC_LENGTH(ctl) ((ctl).len)
  38 #define VEC_BUF(ctl, num) ((ctl).buf[num])