rbutterworth@watmath.UUCP (Ray Butterworth) (01/15/87)
> From: gwyn@brl-smoke.ARPA (Doug Gwyn ) > Subject: Re: RMS comments to X3J11 (LONG) > Date: 8 Jan 87 15:56:56 GMT > > short in, out; > > { > > char *inptr, *outptr; > > inptr = (char *) ∈ > > outptr = (char *) &out; > > int i; > > for (i = 0; i < sizeof (short); i++) > > outptr[i] = inptr[i]; > > } > > is defined and equivalent to > > short out, in; > > out = in; > No, this can't be guaranteed. For example, there may be bits > in the short that are not covered by its chars. Is this really true? That means that functions such as memcopy(), memcmp(), fwrite(), and fread() can not be implemented in C. They must be written in assembler or Pascal or Cobol or some other language. If this really is true, the standard should state so very explictly since I'm sure that many people aren't aware of this fact or of its implications.