fssh_min_c
#define min_c(a,b) fssh_min_c(a,b)
fssh_size_t bytesInPage = fssh_min_c(
fssh_off_t fileLeft = fssh_min_c((uint64_t)fileVec.length, (uint64_t)bytesLeft);
fssh_size_t tempVecSize = fssh_min_c(vecLeft, fileLeft - size);
fssh_size_t vecLen = fssh_min_c(vecs[i].iov_len, toRead);
fssh_size_t vecLen = fssh_min_c(vecs[i].iov_len, toWrite);