ssize_t wrapFull()

in xar/FileUtil.h [33:52]

• 18 lines of code
• 5 McCabe index (conditional complexity)

ssize_t wrapFull(F f, int fd, void* buf, size_t count) {
  char* b = static_cast<char*>(buf);
  ssize_t totalBytes = 0;
  ssize_t r;
  do {
    r = f(fd, b, count);
    if (r == -1) {
      if (errno == EINTR) {
        continue;
      }
      return r;
    }

    totalBytes += r;
    b += r;
    count -= r;
  } while (r != 0 && count); // 0 means EOF

  return totalBytes;
}