home *** CD-ROM | disk | FTP | other *** search
- Path: newshost.lanl.gov!tanmoy
- From: tanmoy@qcd.lanl.gov (Tanmoy Bhattacharya)
- Newsgroups: comp.std.c
- Subject: Re: sizeof(char) ~= sizeof(float)
- Date: 27 Feb 1996 18:42:01 GMT
- Organization: Los Alamos National Laboratory
- Message-ID: <TANMOY.96Feb27114201@qcd.lanl.gov>
- References: <WALD.96Feb24131532@woodpecker.lcs.mit.edu> <4gr3d1$dca@usenet.pa.dec.com>
- <TANMOY.96Feb25203514@qcd.lanl.gov>
- <DnFr78.1wo@ukpsshp1.serigate.philips.nl>
- NNTP-Posting-Host: qcd.lanl.gov
- Mime-Version: 1.0
- Content-Type: text
- In-reply-to: baynes@ukpsshp1.serigate.philips.nl's message of Tue, 27 Feb 1996 13:09:08 GMT
-
- In article <DnFr78.1wo@ukpsshp1.serigate.philips.nl>
- baynes@ukpsshp1.serigate.philips.nl (Stephen Baynes) writes:
-
- SB: Tanmoy Bhattacharya (tanmoy@qcd.lanl.gov) wrote:
- SB: : In article <4gr3d1$dca@usenet.pa.dec.com>
- SB: : diamond@tbj.dec.com (Norman Diamond) writes:
- SB: <snip - copying data by using chars of different sorts vs memcpy >
- SB: : This was a free-standing implementation, and memcpy may be absent. (In
- SB: : a hosted implementation, as all read/write is done as if through
- SB: : getc/putc which handles unsigned char values, and binary files written
- SB: : out must be read back unchanged, the situation is impossible).
- SB:
- SB: That read/write is done by getc/putc does not imply very much about copying
- SB: chars. I don't see any requirement that fwrite/fread use one putc/getc per
- SB: byte(ie char) of memory. Fwrite could use one per bit writing the
- values 'Y' or
- SB: 'N' if it wanted so long as fread will read it back again. My
- understanding
- SB: is that the use of getc/putc means you can write a file with
- fwrite, copy it
- SB: with getc/putc and read the copy with fread to get what you started with.
-
- I understood it to mean that I could take the same (void*) pointer to
- the data, and call putc repeatedly on the successive bytes of the
- data, and the resulting file is identical to doing an fwrite. I think
- the standard should clarify its meaning.
-
- Cheers
- Tanmoy
- --
- tanmoy@qcd.lanl.gov(128.165.23.46) DECNET: BETA::"tanmoy@lanl.gov"(1.218=1242)
- Tanmoy Bhattacharya O:T-8(MS B285)LANL,NM87545 H:#9,3000,Trinity Drive,NM87544
- Others see <gopher://yaleinfo.yale.edu:7700/00/Internet-People/internet-mail>,
- <http://alpha.acast.nova.edu/cgi-bin/inmgq.pl>or<ftp://csd4.csd.uwm.edu/pub/
- internetwork-mail-guide>. -- <http://nqcd.lanl.gov/people/tanmoy/tanmoy.html>
- fax: 1 (505) 665 3003 voice: 1 (505) 665 4733 [ Home: 1 (505) 662 5596 ]
-