projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d5906168 | 1 | /* |
| 161423a6 RE |
2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| d5906168 | 5 | * |
| 7784fa72 | 6 | * @(#)c_sfe.c 5.3 %G% |
| 161423a6 RE |
7 | */ |
| 8 | ||
| 9 | /* | |
| d5906168 DL |
10 | * sequential formatted external I/O - common read & write routines |
| 11 | */ | |
| 12 | ||
| 13 | #include "fio.h" | |
| 14 | ||
| 7784fa72 | 15 | c_sfe(a,flg,mode,str) cilist *a; char *str; /* check */ |
| d5906168 DL |
16 | { unit *p; |
| 17 | int n; | |
| 18 | ||
| 089a8031 JB |
19 | external=YES; |
| 20 | formatted=FORMATTED; | |
| d5906168 DL |
21 | fmtbuf=a->cifmt; |
| 22 | lfname = NULL; | |
| 23 | elist = NO; | |
| 24 | errflag = a->cierr; | |
| 25 | endflag = a->ciend; | |
| 26 | lunit = a->ciunit; | |
| 27 | if(not_legal(lunit)) err(errflag,F_ERUNIT,str); | |
| 28 | curunit = p = &units[lunit]; | |
| 7784fa72 | 29 | if(!p->ufd && (n=fk_open(flg,mode,FMT,(ftnint)lunit)) ) |
| d5906168 DL |
30 | err(errflag,n,str) |
| 31 | cf = curunit->ufd; | |
| 32 | elist = YES; | |
| 33 | lfname = curunit->ufnm; | |
| 34 | if(!p->ufmt) err(errflag,F_ERNOFIO,str) | |
| 35 | cursor=recpos=scale=reclen=0; | |
| 36 | radix = 10; | |
| 37 | signit = YES; | |
| 38 | cblank = curunit->ublnk; | |
| 39 | cplus = NO; | |
| 40 | return(OK); | |
| 41 | } | |
| 42 | ||
| 43 | x_tab() | |
| 44 | { int n; | |
| 45 | if(reclen < recpos) reclen = recpos; | |
| 46 | if(curunit->useek) | |
| 47 | { if((recpos+cursor) < 0) cursor = -recpos; /* to BOR */ | |
| 48 | n = reclen - recpos; /* distance to eor, n>=0 */ | |
| 49 | if((cursor-n) > 0) | |
| 50 | { fseek(cf,(long)n,1); /* find current eor */ | |
| 51 | recpos = reclen; | |
| 52 | cursor -= n; | |
| 53 | } | |
| 54 | else | |
| 55 | { fseek(cf,(long)cursor,1); /* do not pass go */ | |
| 56 | recpos += cursor; | |
| 57 | return(cursor=0); | |
| 58 | } | |
| 59 | } | |
| 60 | else | |
| 61 | if(cursor < 0) return(F_ERSEEK); /* can't go back */ | |
| 62 | while(cursor--) | |
| 63 | { if(reading) | |
| 64 | { n = (*getn)(); | |
| 65 | if(n=='\n') return(cursor=0); /* be tolerant */ | |
| 66 | if(n==EOF) return(EOF); | |
| 67 | } | |
| 68 | else (*putn)(' '); /* fill in the empty record */ | |
| 69 | } | |
| 70 | return(cursor=0); | |
| 71 | } |