projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 3443cb26 | 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. | |
| 3443cb26 | 5 | * |
| 161423a6 RE |
6 | * @(#)util.c 5.1 %G% |
| 7 | */ | |
| 8 | ||
| 9 | /* | |
| 3443cb26 DW |
10 | * utility routines |
| 11 | */ | |
| 12 | ||
| 3443cb26 DW |
13 | #include "fio.h" |
| 14 | ||
| fe1e75aa | 15 | extern short ccntrl_, blzero_; |
| 3443cb26 | 16 | |
| 3443cb26 DW |
17 | nowreading(x) unit *x; |
| 18 | { | |
| ff26b80a | 19 | return(now_acc(x,"r")); |
| 3443cb26 DW |
20 | } |
| 21 | ||
| 22 | nowwriting(x) unit *x; | |
| ff26b80a DW |
23 | { |
| 24 | return(now_acc(x,"a")); | |
| 25 | } | |
| 26 | ||
| 5e52dbf7 | 27 | LOCAL now_acc(x,mode) |
| ff26b80a | 28 | unit *x; char *mode; |
| 3443cb26 DW |
29 | { |
| 30 | long loc; | |
| ff26b80a DW |
31 | |
| 32 | if (!x->ufnm) | |
| 33 | { | |
| 34 | errno = EBADF; | |
| 35 | return(NO); | |
| 36 | } | |
| 37 | if (x->useek) | |
| 38 | loc=ftell(x->ufd); | |
| 39 | if (freopen(x->ufnm,mode,x->ufd)) | |
| 40 | { | |
| 41 | if (x->useek) | |
| 42 | fseek(x->ufd,loc,0); | |
| 43 | x->uwrt = (*mode=='a'); | |
| 44 | return(YES); | |
| 45 | } | |
| 46 | if (x->ufd = fopen(x->ufnm, (*mode=='a')? "r":"a")) | |
| 47 | if (x->useek) | |
| 48 | fseek(x->ufd,loc,0); | |
| 49 | return(NO); | |
| 3443cb26 DW |
50 | } |
| 51 | ||
| 52 | g_char(a,alen,b) char *a,*b; ftnlen alen; | |
| 53 | { char *x=a+alen-1, *y=b+alen-1; | |
| 54 | while (x >= a && *x == ' ') {x--; y--;} | |
| 55 | *(y+1) = '\0'; | |
| 56 | while (x >= a) *y-- = *x--; | |
| 57 | } | |
| 58 | ||
| 59 | b_char(from, to, tolen) char *from, *to; ftnlen tolen; | |
| 60 | { int i=0; | |
| 61 | while (*from && i < tolen) { | |
| 62 | *to++ = *from++; | |
| 63 | i++; | |
| 64 | } | |
| 65 | while (i++ < tolen) | |
| 66 | *to++ = ' '; | |
| 67 | } | |
| 68 | ||
| 3443cb26 DW |
69 | char |
| 70 | last_char(f) FILE *f; | |
| 71 | { | |
| 72 | fseek(f,-2L,1); | |
| 73 | if(ftell(f)) return(getc(f)); | |
| 74 | else return('\n'); | |
| 75 | } |