1398       size_t cbAvail = ps->current->datacount;  in store_read_buffer_avail()  local
1403          cbAvail += STORE_BUFFER_SIZE;  in store_read_buffer_avail()
1409       if (cbAvail > ps->readpos)  in store_read_buffer_avail()
1410          return cbAvail - ps->readpos;  in store_read_buffer_avail()
1450       size_t cbAvail = store_read_buffer_size(ps) - ps->readpos;  in store_read_imp()  local
1452       if (cbAvail > 0)  in store_read_imp()
1454          if (cbAvail > st) cbAvail = st;  in store_read_imp()
1455          memcpy(pb, ps->next->buffer + ps->readpos, cbAvail);  in store_read_imp()
1456          st -= cbAvail;  in store_read_imp()
1457          pb += cbAvail;  in store_read_imp()
1458          ps->readpos += cbAvail;  in store_read_imp()
3229       png_size_t cb, cbAvail;  in modifier_progressive_read()  local
3241       cbAvail = store_read_buffer_avail(&pm->this);  in modifier_progressive_read()
3243          cbAvail += pm->buffer_count - pm->buffer_position;  in modifier_progressive_read()
3245       if (cb > cbAvail)  in modifier_progressive_read()
3248          if (cbAvail == 0)  in modifier_progressive_read()
3251          cb = cbAvail;  in modifier_progressive_read()