libf2c/libI77/dfe.c

   1 #include "f2c.h"
   2 #include "fio.h"
   3 #include "fmt.h"
   4
   5 y_rsk(Void)
   6 {
   7         if(f__curunit->uend || f__curunit->url <= f__recpos
   8                 || f__curunit->url == 1) return 0;
   9         do {
  10                 getc(f__cf);
  11         } while(++f__recpos < f__curunit->url);
  12         return 0;
  13 }
  14 y_getc(Void)
  15 {
  16         int ch;
  17         if(f__curunit->uend) return(-1);
  18         if((ch=getc(f__cf))!=EOF)
  19         {
  20                 f__recpos++;
  21                 if(f__curunit->url>=f__recpos ||
  22                         f__curunit->url==1)
  23                         return(ch);
  24                 else    return(' ');
  25         }
  26         if(feof(f__cf))
  27         {
  28                 f__curunit->uend=1;
  29                 errno=0;
  30                 return(-1);
  31         }
  32         err(f__elist->cierr,errno,"readingd");
  33 }
  34
  35  static int
  36 y_rev(Void)
  37 {
  38         if (f__recpos < f__hiwater)
  39                 f__recpos = f__hiwater;
  40         if (f__curunit->url > 1)
  41                 while(f__recpos < f__curunit->url)
  42                         (*f__putn)(' ');
  43         if (f__recpos)
  44                 f__putbuf(0);
  45         f__recpos = 0;
  46         return(0);
  47 }
  48
  49  static int
  50 y_err(Void)
  51 {
  52         err(f__elist->cierr, 110, "dfe");
  53 }
  54
  55  static int
  56 y_newrec(Void)
  57 {
  58         y_rev();
  59         f__hiwater = f__cursor = 0;
  60         return(1);
  61 }
  62
  63 #ifdef KR_headers
  64 c_dfe(a) cilist *a;
  65 #else
  66 c_dfe(cilist *a)
  67 #endif
  68 {
  69         f__sequential=0;
  70         f__formatted=f__external=1;
  71         f__elist=a;
  72         f__cursor=f__scale=f__recpos=0;
  73         f__curunit = &f__units[a->ciunit];
  74         if(a->ciunit>MXUNIT || a->ciunit<0)
  75                 err(a->cierr,101,"startchk");
  76         if(f__curunit->ufd==NULL && fk_open(DIR,FMT,a->ciunit))
  77                 err(a->cierr,104,"dfe");
  78         f__cf=f__curunit->ufd;
  79         if(!f__curunit->ufmt) err(a->cierr,102,"dfe");
  80         if(!f__curunit->useek) err(a->cierr,104,"dfe");
  81         f__fmtbuf=a->cifmt;
  82         if(a->cirec <= 0)
  83                 err(a->cierr,130,"dfe");
  84         (void) fseek(f__cf,(long)f__curunit->url * (a->cirec-1),SEEK_SET);
  85         f__curunit->uend = 0;
  86         return(0);
  87 }
  88 #ifdef KR_headers
  89 integer s_rdfe(a) cilist *a;
  90 #else
  91 integer s_rdfe(cilist *a)
  92 #endif
  93 {
  94         int n;
  95         if(f__init != 1) f_init();
  96         f__init = 3;
  97         f__reading=1;
  98         if(n=c_dfe(a))return(n);
  99         if(f__curunit->uwrt && f__nowreading(f__curunit))
 100                 err(a->cierr,errno,"read start");
 101         f__getn = y_getc;
 102         f__doed = rd_ed;
 103         f__doned = rd_ned;
 104         f__dorevert = f__donewrec = y_err;
 105         f__doend = y_rsk;
 106         if(pars_f(f__fmtbuf)<0)
 107                 err(a->cierr,100,"read start");
 108         fmt_bg();
 109         return(0);
 110 }
 111 #ifdef KR_headers
 112 integer s_wdfe(a) cilist *a;
 113 #else
 114 integer s_wdfe(cilist *a)
 115 #endif
 116 {
 117         int n;
 118         if(f__init != 1) f_init();
 119         f__init = 3;
 120         f__reading=0;
 121         if(n=c_dfe(a)) return(n);
 122         if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit))
 123                 err(a->cierr,errno,"startwrt");
 124         f__putn = x_putc;
 125         f__doed = w_ed;
 126         f__doned= w_ned;
 127         f__dorevert = y_err;
 128         f__donewrec = y_newrec;
 129         f__doend = y_rev;
 130         if(pars_f(f__fmtbuf)<0)
 131                 err(a->cierr,100,"startwrt");
 132         fmt_bg();
 133         return(0);
 134 }
 135 integer e_rdfe(Void)
 136 {
 137         f__init = 1;
 138         en_fio();
 139         return(0);
 140 }
 141
 142 integer e_wdfe(Void)
 143 {
 144         f__init = 1;
 145         return en_fio();
 146 }