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81fea2b1 JL |
1 | #include "f2c.h" |
2 | #include "fio.h" | |
3 | extern uiolen f__reclen; | |
4 | long f__recloc; | |
5 | ||
6 | #ifdef KR_headers | |
7 | c_sue(a) cilist *a; | |
8 | #else | |
9 | c_sue(cilist *a) | |
10 | #endif | |
11 | { | |
81fea2b1 JL |
12 | f__external=f__sequential=1; |
13 | f__formatted=0; | |
14 | f__curunit = &f__units[a->ciunit]; | |
b93be35b DL |
15 | if(a->ciunit >= MXUNIT || a->ciunit < 0) |
16 | err(a->cierr,101,"startio"); | |
81fea2b1 JL |
17 | f__elist=a; |
18 | if(f__curunit->ufd==NULL && fk_open(SEQ,UNF,a->ciunit)) | |
19 | err(a->cierr,114,"sue"); | |
20 | f__cf=f__curunit->ufd; | |
21 | if(f__curunit->ufmt) err(a->cierr,103,"sue"); | |
22 | if(!f__curunit->useek) err(a->cierr,103,"sue"); | |
23 | return(0); | |
24 | } | |
25 | #ifdef KR_headers | |
26 | integer s_rsue(a) cilist *a; | |
27 | #else | |
28 | integer s_rsue(cilist *a) | |
29 | #endif | |
30 | { | |
31 | int n; | |
32 | if(f__init != 1) f_init(); | |
33 | f__init = 3; | |
34 | f__reading=1; | |
35 | if(n=c_sue(a)) return(n); | |
36 | f__recpos=0; | |
37 | if(f__curunit->uwrt && f__nowreading(f__curunit)) | |
38 | err(a->cierr, errno, "read start"); | |
39 | if(fread((char *)&f__reclen,sizeof(uiolen),1,f__cf) | |
40 | != 1) | |
41 | { if(feof(f__cf)) | |
42 | { f__curunit->uend = 1; | |
43 | err(a->ciend, EOF, "start"); | |
44 | } | |
45 | clearerr(f__cf); | |
46 | err(a->cierr, errno, "start"); | |
47 | } | |
48 | return(0); | |
49 | } | |
50 | #ifdef KR_headers | |
51 | integer s_wsue(a) cilist *a; | |
52 | #else | |
53 | integer s_wsue(cilist *a) | |
54 | #endif | |
55 | { | |
56 | int n; | |
57 | if(f__init != 1) f_init(); | |
58 | f__init = 3; | |
59 | if(n=c_sue(a)) return(n); | |
60 | f__reading=0; | |
61 | f__reclen=0; | |
62 | if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit)) | |
63 | err(a->cierr, errno, "write start"); | |
64 | f__recloc=ftell(f__cf); | |
65 | (void) fseek(f__cf,(long)sizeof(uiolen),SEEK_CUR); | |
66 | return(0); | |
67 | } | |
68 | integer e_wsue(Void) | |
69 | { long loc; | |
70 | f__init = 1; | |
71 | fwrite((char *)&f__reclen,sizeof(uiolen),1,f__cf); | |
72 | #ifdef ALWAYS_FLUSH | |
73 | if (fflush(f__cf)) | |
74 | err(f__elist->cierr, errno, "write end"); | |
75 | #endif | |
76 | loc=ftell(f__cf); | |
77 | fseek(f__cf,f__recloc,SEEK_SET); | |
78 | fwrite((char *)&f__reclen,sizeof(uiolen),1,f__cf); | |
79 | fseek(f__cf,loc,SEEK_SET); | |
80 | return(0); | |
81 | } | |
82 | integer e_rsue(Void) | |
83 | { | |
84 | f__init = 1; | |
85 | (void) fseek(f__cf,(long)(f__reclen-f__recpos+sizeof(uiolen)),SEEK_CUR); | |
86 | return(0); | |
87 | } |