turlfmt.c - plan9port - [fork] Plan 9 from user space
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       ---
       turlfmt.c (425B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 #include <bin.h>
            4 #include <httpd.h>
            5 
            6 int
            7 hurlfmt(Fmt *f)
            8 {
            9         char buf[HMaxWord*2];
           10         Rune r;
           11         char *s;
           12         int t;
           13 
           14         s = va_arg(f->args, char*);
           15         for(t = 0; t < sizeof(buf) - 8; ){
           16                 s += chartorune(&r, s);
           17                 if(r == 0)
           18                         break;
           19                 if(r <= ' ' || r == '%' || r >= Runeself)
           20                         t += snprint(&buf[t], sizeof(buf)-t, "%%%2.2x", r);
           21                 else
           22                         buf[t++] = r;
           23         }
           24         buf[t] = 0;
           25         return fmtstrcpy(f, buf);
           26 }