libf2c/libI77/rsfe.c

   1 /* read sequential formatted external */
   2 #include "config.h"
   3 #include "f2c.h"
   4 #include "fio.h"
   5 #include "fmt.h"
   6
   7 xrd_SL(Void)
   8 {       int ch;
   9         if(!f__curunit->uend)
  10                 while((ch=getc(f__cf))!='\n')
  11                         if (ch == EOF) {
  12                                 f__curunit->uend = 1;
  13                                 break;
  14                                 }
  15         f__cursor=f__recpos=0;
  16         return(1);
  17 }
  18 x_getc(Void)
  19 {       int ch;
  20         if(f__curunit->uend) return(EOF);
  21         ch = getc(f__cf);
  22         if(ch!=EOF && ch!='\n')
  23         {       f__recpos++;
  24                 return(ch);
  25         }
  26         if(ch=='\n')
  27         {       (void) ungetc(ch,f__cf);
  28                 return(ch);
  29         }
  30         if(f__curunit->uend || feof(f__cf))
  31         {       errno=0;
  32                 f__curunit->uend=1;
  33                 return(-1);
  34         }
  35         return(-1);
  36 }
  37 x_endp(Void)
  38 {
  39         xrd_SL();
  40         return f__curunit->uend == 1 ? EOF : 0;
  41 }
  42 x_rev(Void)
  43 {
  44         (void) xrd_SL();
  45         return(0);
  46 }
  47 #ifdef KR_headers
  48 integer s_rsfe(a) cilist *a; /* start */
  49 #else
  50 integer s_rsfe(cilist *a) /* start */
  51 #endif
  52 {       int n;
  53         if(f__init != 1) f_init();
  54         f__init = 3;
  55         f__reading=1;
  56         f__sequential=1;
  57         f__formatted=1;
  58         f__external=1;
  59         if(n=c_sfe(a)) return(n);
  60         f__elist=a;
  61         f__cursor=f__recpos=0;
  62         f__scale=0;
  63         f__fmtbuf=a->cifmt;
  64         f__curunit= &f__units[a->ciunit];
  65         f__cf=f__curunit->ufd;
  66         if(pars_f(f__fmtbuf)<0) err(a->cierr,100,"startio");
  67         f__getn= x_getc;
  68         f__doed= rd_ed;
  69         f__doned= rd_ned;
  70         fmt_bg();
  71         f__doend=x_endp;
  72         f__donewrec=xrd_SL;
  73         f__dorevert=x_rev;
  74         f__cblank=f__curunit->ublnk;
  75         f__cplus=0;
  76         if(f__curunit->uwrt && f__nowreading(f__curunit))
  77                 err(a->cierr,errno,"read start");
  78         if(f__curunit->uend)
  79                 err(f__elist->ciend,(EOF),"read start");
  80         return(0);
  81 }