// stretchy buffer // init: NULL // free: sbfree() // push_back: sbpush() // size: sbcount() // #define sbfree(a) ((a) ? free(stb__sbraw(a)),0 : 0) #define sbpush(a,v) (stb__sbmaybegrow(a,1), (a)[stb__sbn(a)++] = (v)) #define sbcount(a) ((a) ? stb__sbn(a) : 0) #define sbadd(a,n) (stb__sbmaybegrow(a,n), stb__sbn(a)+=(n), &(a)[stb__sbn(a)-(n)]) #define sblast(a) ((a)[stb__sbn(a)-1]) #include #define stb__sbraw(a) ((int *) (a) - 2) #define stb__sbm(a) stb__sbraw(a)[0] #define stb__sbn(a) stb__sbraw(a)[1] #define stb__sbneedgrow(a,n) ((a)==0 || stb__sbn(a)+n >= stb__sbm(a)) #define stb__sbmaybegrow(a,n) (stb__sbneedgrow(a,(n)) ? stb__sbgrow(a,n) : 0) #define stb__sbgrow(a,n) stb__sbgrowf((void **) &(a), (n), sizeof(*(a))) static void stb__sbgrowf(void **arr, int increment, int itemsize) { int m = *arr ? 2*stb__sbm(*arr)+increment : increment+1; void *p = realloc(*arr ? stb__sbraw(*arr) : 0, itemsize * m + sizeof(int)*2); assert(p); if (p) { if (!*arr) ((int *) p)[1] = 0; *arr = (void *) ((int *) p + 2); stb__sbm(*arr) = m; } }