From: Junio C Hamano <junkio@cox.net>
Date: Fri, 14 Oct 2005 06:59:09 GMT
Subject: Re: [PATCH] Try URI quoting for embedded TAB and LF in pathnames
Message-ID: <7vll0wvb2a.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <87vf02qy79.fsf@penguin.cs.ucla.edu>

Paul Eggert <eggert@CS.UCLA.EDU> writes:

> Here is the proposed format.  Each file name is a string of bytes, in
> one of the following two formats:
>
> A.  A nonempty sequence of ASCII graphic characters (i.e., bytes in
>     the range '!' == '\041' through '~' == '\177').  The first byte
>     cannot be '!' == '\041' or '"' == '\042'.  Leading '"' is used for
>     (B) below, and leading '!' is reserved for future extensions.
>
> B.  A nonempty C-language character string literal, with the following
>     restrictions and modifications:
>
>     B1.  No multibyte character processing is done.  Members of the
>          string literal are treated as bytes, not characters.  Null
>          bytes are not allowed, and '"' == '\042', '\\' == '\134' and
>          '\n' == '\012' are allowed only if properly escaped as shown
>          below; but all other bytes are allowed.
>
>     B2.  No trigraph processing is done (e.g., ??/ stands for three
>          bytes, not one).
>
>     B3.  No line-splicing is done (i.e., backslash-newline is not allowed).
>
>     B4.  Only the following escape sequences are allowed.
>
>            \" \\ \a \b \f \n \r \t \v
>            \XYZ  (where X, Y, and Z are octal digits, X <= 3, and
>                   at least one of the digits is nonzero)

Just to let you know, I am slowly converting apply.c to accept
this format, and also diff.c to produce this.  I did not
personally like the missing double quotes around what I did
anyway, although it was easier to code.