libf2c/libI77/ftell_.c

   1 #include "config.h"
   2 #include "f2c.h"
   3 #include "fio.h"
   4
   5  static FILE *
   6 #ifdef KR_headers
   7 unit_chk(Unit, who) integer Unit; char *who;
   8 #else
   9 unit_chk(integer Unit, char *who)
  10 #endif
  11 {
  12         if (Unit >= MXUNIT || Unit < 0)
  13                 f__fatal(101, who);
  14         return f__units[Unit].ufd;
  15         }
  16
  17  integer
  18 #ifdef KR_headers
  19 G77_ftell_0 (Unit) integer *Unit;
  20 #else
  21 G77_ftell_0 (integer *Unit)
  22 #endif
  23 {
  24         FILE *f;
  25         return (f = unit_chk(*Unit, "ftell")) ? (integer) FTELL(f) : -1L;
  26         }
  27
  28  integer
  29 #ifdef KR_headers
  30 G77_fseek_0 (Unit, offset, xwhence) integer *Unit, *offset, *xwhence;
  31 #else
  32 G77_fseek_0 (integer *Unit, integer *offset, integer *xwhence)
  33 #endif
  34 {
  35         FILE *f;
  36         int w = (int)*xwhence;
  37 #ifdef SEEK_SET
  38         static int wohin[3] = { SEEK_SET, SEEK_CUR, SEEK_END };
  39 #endif
  40         if (w < 0 || w > 2)
  41                 w = 0;
  42 #ifdef SEEK_SET
  43         w = wohin[w];
  44 #endif
  45         return  !(f = unit_chk(*Unit, "fseek"))
  46                 || FSEEK(f, (off_t) *offset, w) ? 1 : 0;
  47         }