tutil.c - plan9port - [fork] Plan 9 from user space
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       ---
       tutil.c (491B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 #include <fcall.h>
            4 #include <thread.h>
            5 #include "9p.h"
            6 
            7 void
            8 readbuf(Req *r, void *s, long n)
            9 {
           10         r->ofcall.count = r->ifcall.count;
           11         if(r->ifcall.offset >= n){
           12                 r->ofcall.count = 0;
           13                 return;
           14         }
           15         if(r->ifcall.offset+r->ofcall.count > n)
           16                 r->ofcall.count = n - r->ifcall.offset;
           17         memmove(r->ofcall.data, (char*)s+r->ifcall.offset, r->ofcall.count);
           18 }
           19 
           20 void
           21 readstr(Req *r, char *s)
           22 {
           23         if(s == nil)
           24                 r->ofcall.count = 0;
           25         else
           26                 readbuf(r, s, strlen(s));
           27 }