tmailfs: allow spaces in box name - plan9port - [fork] Plan 9 from user space
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       ---
 (DIR) commit 951fef52c99ad174f9cfb413ba7fd831d1ee5e4b
 (DIR) parent 6541f1798bb775b2a00c64af2b8d3f296a3d6f40
 (HTM) Author: Akshat Kumar <seed@mail.nanosouffle.net>
       Date:   Fri,  6 Sep 2013 16:10:26 -0400
       
       mailfs: allow spaces in box name
       
       Mail services (such as Google Mail) will often have
       directories with names that contain spaces. Acme
       does not support spaces in window names. So, replace
       spaces in mail directory names with the Unicode
       character for visible space.
       
       The code is a bit of an over-approximation and
       generally non-optimal.
       
       R=rsc, david.ducolombier, 0intro
       CC=plan9port.codebot
       https://codereview.appspot.com/13010048
       
       Diffstat:
         M src/cmd/acme/mail/win.c             |      17 ++++++++++++++++-
       
       1 file changed, 16 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/src/cmd/acme/mail/win.c b/src/cmd/acme/mail/win.c
       t@@ -105,7 +105,22 @@ wintagwrite(Window *w, char *s, int n)
        void
        winname(Window *w, char *s)
        {
       -        ctlprint(w->ctl, "name %s\n", s);
       +        int len;
       +        char *ns, *sp;
       +        Rune r = L'␣';        /* visible space */
       +
       +        len = 0;
       +        ns = emalloc(strlen(s)*runelen(r) + 1);
       +        for(sp = s; *sp != '\0'; sp++, len++){
       +                if(isspace(*sp)){
       +                        len += runetochar(ns+len, &r)-1;
       +                        continue;
       +                }
       +                *(ns+len) = *sp;
       +        }
       +        ctlprint(w->ctl, "name %s\n", ns);
       +        free(ns);
       +        return;
        }
        
        void