| #include "config.h" |
| #include "f2c.h" |
| #include "fio.h" |
| |
| int |
| c_due (cilist * a) |
| { |
| if (f__init != 1) |
| f_init (); |
| f__init = 3; |
| if (a->ciunit >= MXUNIT || a->ciunit < 0) |
| err (a->cierr, 101, "startio"); |
| f__sequential = f__formatted = f__recpos = 0; |
| f__external = 1; |
| f__curunit = &f__units[a->ciunit]; |
| if (a->ciunit >= MXUNIT || a->ciunit < 0) |
| err (a->cierr, 101, "startio"); |
| f__elist = a; |
| if (f__curunit->ufd == NULL && fk_open (DIR, UNF, a->ciunit)) |
| err (a->cierr, 104, "due"); |
| f__cf = f__curunit->ufd; |
| if (f__curunit->ufmt) |
| err (a->cierr, 102, "cdue"); |
| if (!f__curunit->useek) |
| err (a->cierr, 104, "cdue"); |
| if (f__curunit->ufd == NULL) |
| err (a->cierr, 114, "cdue"); |
| if (a->cirec <= 0) |
| err (a->cierr, 130, "due"); |
| FSEEK (f__cf, (off_t) (a->cirec - 1) * f__curunit->url, SEEK_SET); |
| f__curunit->uend = 0; |
| return (0); |
| } |
| |
| integer |
| s_rdue (cilist * a) |
| { |
| int n; |
| f__reading = 1; |
| if ((n = c_due (a))) |
| return (n); |
| if (f__curunit->uwrt && f__nowreading (f__curunit)) |
| err (a->cierr, errno, "read start"); |
| return (0); |
| } |
| |
| integer |
| s_wdue (cilist * a) |
| { |
| int n; |
| f__reading = 0; |
| if ((n = c_due (a))) |
| return (n); |
| if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit)) |
| err (a->cierr, errno, "write start"); |
| return (0); |
| } |
| |
| integer |
| e_rdue (void) |
| { |
| f__init = 1; |
| if (f__curunit->url == 1 || f__recpos == f__curunit->url) |
| return (0); |
| FSEEK (f__cf, (off_t) (f__curunit->url - f__recpos), SEEK_CUR); |
| if (FTELL (f__cf) % f__curunit->url) |
| err (f__elist->cierr, 200, "syserr"); |
| return (0); |
| } |
| |
| integer |
| e_wdue (void) |
| { |
| f__init = 1; |
| #ifdef ALWAYS_FLUSH |
| if (fflush (f__cf)) |
| err (f__elist->cierr, errno, "write end"); |
| #endif |
| return (e_rdue ()); |
| } |