libf2c/libI77/dfe.c

   1 #include "config.h"
   2 #include "f2c.h"
   3 #include "fio.h"
   4 #include "fmt.h"
   5
   6 int
   7 y_rsk (void)
   8 {
   9   if (f__curunit->uend || f__curunit->url <= f__recpos
  10       || f__curunit->url == 1)
  11     return 0;
  12   do
  13     {
  14       getc (f__cf);
  15     }
  16   while (++f__recpos < f__curunit->url);
  17   return 0;
  18 }
  19
  20 int
  21 y_getc (void)
  22 {
  23   int ch;
  24   if (f__curunit->uend)
  25     return (-1);
  26   if ((ch = getc (f__cf)) != EOF)
  27     {
  28       f__recpos++;
  29       if (f__curunit->url >= f__recpos || f__curunit->url == 1)
  30         return (ch);
  31       else
  32         return (' ');
  33     }
  34   if (feof (f__cf))
  35     {
  36       f__curunit->uend = 1;
  37       errno = 0;
  38       return (-1);
  39     }
  40   err (f__elist->cierr, errno, "readingd");
  41 }
  42
  43 static int
  44 y_rev (void)
  45 {
  46   if (f__recpos < f__hiwater)
  47     f__recpos = f__hiwater;
  48   if (f__curunit->url > 1)
  49     while (f__recpos < f__curunit->url)
  50       (*f__putn) (' ');
  51   if (f__recpos)
  52     f__putbuf (0);
  53   f__recpos = 0;
  54   return (0);
  55 }
  56
  57 static int
  58 y_err (void)
  59 {
  60   err (f__elist->cierr, 110, "dfe");
  61 }
  62
  63 static int
  64 y_newrec (void)
  65 {
  66   y_rev ();
  67   f__hiwater = f__cursor = 0;
  68   return (1);
  69 }
  70
  71 int
  72 c_dfe (cilist * a)
  73 {
  74   f__sequential = 0;
  75   f__formatted = f__external = 1;
  76   f__elist = a;
  77   f__cursor = f__scale = f__recpos = 0;
  78   f__curunit = &f__units[a->ciunit];
  79   if (a->ciunit > MXUNIT || a->ciunit < 0)
  80     err (a->cierr, 101, "startchk");
  81   if (f__curunit->ufd == NULL && fk_open (DIR, FMT, a->ciunit))
  82     err (a->cierr, 104, "dfe");
  83   f__cf = f__curunit->ufd;
  84   if (!f__curunit->ufmt)
  85     err (a->cierr, 102, "dfe");
  86   if (!f__curunit->useek)
  87     err (a->cierr, 104, "dfe");
  88   f__fmtbuf = a->cifmt;
  89   if (a->cirec <= 0)
  90     err (a->cierr, 130, "dfe");
  91   FSEEK (f__cf, (off_t) f__curunit->url * (a->cirec - 1), SEEK_SET);
  92   f__curunit->uend = 0;
  93   return (0);
  94 }
  95
  96 integer
  97 s_rdfe (cilist * a)
  98 {
  99   int n;
 100   if (f__init != 1)
 101     f_init ();
 102   f__init = 3;
 103   f__reading = 1;
 104   if ((n = c_dfe (a)))
 105     return (n);
 106   if (f__curunit->uwrt && f__nowreading (f__curunit))
 107     err (a->cierr, errno, "read start");
 108   f__getn = y_getc;
 109   f__doed = rd_ed;
 110   f__doned = rd_ned;
 111   f__dorevert = f__donewrec = y_err;
 112   f__doend = y_rsk;
 113   if (pars_f (f__fmtbuf) < 0)
 114     err (a->cierr, 100, "read start");
 115   fmt_bg ();
 116   return (0);
 117 }
 118
 119 integer
 120 s_wdfe (cilist * a)
 121 {
 122   int n;
 123   if (f__init != 1)
 124     f_init ();
 125   f__init = 3;
 126   f__reading = 0;
 127   if ((n = c_dfe (a)))
 128     return (n);
 129   if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit))
 130     err (a->cierr, errno, "startwrt");
 131   f__putn = x_putc;
 132   f__doed = w_ed;
 133   f__doned = w_ned;
 134   f__dorevert = y_err;
 135   f__donewrec = y_newrec;
 136   f__doend = y_rev;
 137   if (pars_f (f__fmtbuf) < 0)
 138     err (a->cierr, 100, "startwrt");
 139   fmt_bg ();
 140   return (0);
 141 }
 142
 143 integer
 144 e_rdfe (void)
 145 {
 146   f__init = 1;
 147   en_fio ();
 148   return (0);
 149 }
 150
 151 integer
 152 e_wdfe (void)
 153 {
 154   f__init = 1;
 155   return en_fio ();
 156 }