| #include "config.h" |
| #include "f2c.h" |
| #include "fio.h" |
| extern uiolen f__reclen; |
| off_t f__recloc; |
| |
| int |
| c_sue (cilist * a) |
| { |
| f__external = f__sequential = 1; |
| f__formatted = 0; |
| 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 (SEQ, UNF, a->ciunit)) |
| err (a->cierr, 114, "sue"); |
| f__cf = f__curunit->ufd; |
| if (f__curunit->ufmt) |
| err (a->cierr, 103, "sue"); |
| if (!f__curunit->useek) |
| err (a->cierr, 103, "sue"); |
| return (0); |
| } |
| |
| integer |
| s_rsue (cilist * a) |
| { |
| int n; |
| if (f__init != 1) |
| f_init (); |
| f__init = 3; |
| f__reading = 1; |
| if ((n = c_sue (a))) |
| return (n); |
| f__recpos = 0; |
| if (f__curunit->uwrt && f__nowreading (f__curunit)) |
| err (a->cierr, errno, "read start"); |
| if (fread ((char *) &f__reclen, sizeof (uiolen), 1, f__cf) != 1) |
| { |
| if (feof (f__cf)) |
| { |
| f__curunit->uend = 1; |
| err (a->ciend, EOF, "start"); |
| } |
| clearerr (f__cf); |
| err (a->cierr, errno, "start"); |
| } |
| return (0); |
| } |
| |
| integer |
| s_wsue (cilist * a) |
| { |
| int n; |
| if (f__init != 1) |
| f_init (); |
| f__init = 3; |
| if ((n = c_sue (a))) |
| return (n); |
| f__reading = 0; |
| f__reclen = 0; |
| if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit)) |
| err (a->cierr, errno, "write start"); |
| f__recloc = FTELL (f__cf); |
| FSEEK (f__cf, (off_t) sizeof (uiolen), SEEK_CUR); |
| return (0); |
| } |
| |
| integer |
| e_wsue (void) |
| { |
| off_t loc; |
| f__init = 1; |
| fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf); |
| #ifdef ALWAYS_FLUSH |
| if (fflush (f__cf)) |
| err (f__elist->cierr, errno, "write end"); |
| #endif |
| loc = FTELL (f__cf); |
| FSEEK (f__cf, f__recloc, SEEK_SET); |
| fwrite ((char *) &f__reclen, sizeof (uiolen), 1, f__cf); |
| FSEEK (f__cf, loc, SEEK_SET); |
| return (0); |
| } |
| |
| integer |
| e_rsue (void) |
| { |
| f__init = 1; |
| FSEEK (f__cf, (off_t) (f__reclen - f__recpos + sizeof (uiolen)), SEEK_CUR); |
| return (0); |
| } |