?? due.c
字號(hào):
#include "fio.h"s_rdue(a) cilist *a;{ int n; if(n=c_due(a,READ)) return(n); reading=1; if(curunit->uwrt) nowreading(curunit); return(0);}s_wdue(a) cilist *a;{ int n; if(n=c_due(a,WRITE)) return(n); reading=0; if(!curunit->uwrt) nowwriting(curunit); return(0);}c_due(a,flag) cilist *a;{ if(!init) f_init(); if(a->ciunit>=MXUNIT || a->ciunit<0) err(a->cierr,101,"startio"); recpos=sequential=formatted=0; external=1; curunit = &units[a->ciunit]; elist=a; if(curunit->ufd==NULL && fk_open(flag,DIR,UNF,a->ciunit) ) err(a->cierr,104,"due"); cf=curunit->ufd; if(curunit->ufmt) err(a->cierr,102,"cdue") if(!curunit->useek) err(a->cierr,104,"cdue") if(curunit->ufd==NULL) err(a->cierr,114,"cdue") fseek(cf,(long)(a->cirec-1)*curunit->url,0); curunit->uend = 0; return(0);}e_rdue(){ if(curunit->url==1 || recpos==curunit->url) return(0); fseek(cf,(long)(curunit->url-recpos),1); if(ftell(cf)%curunit->url) err(elist->cierr,200,"syserr"); return(0);}e_wdue(){ return(e_rdue());}?? 快捷鍵說明
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