1 | #include "config.h" |
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2 | #include "f2c.h" |
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3 | #include "fio.h" |
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4 | |
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5 | #ifdef KR_headers |
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6 | c_due(a) cilist *a; |
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7 | #else |
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8 | c_due(cilist *a) |
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9 | #endif |
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10 | { |
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11 | if(f__init != 1) f_init(); |
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12 | f__init = 3; |
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13 | if(a->ciunit>=MXUNIT || a->ciunit<0) |
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14 | err(a->cierr,101,"startio"); |
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15 | f__sequential=f__formatted=f__recpos=0; |
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16 | f__external=1; |
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17 | f__curunit = &f__units[a->ciunit]; |
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18 | if(a->ciunit>=MXUNIT || a->ciunit<0) |
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19 | err(a->cierr,101,"startio"); |
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20 | f__elist=a; |
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21 | if(f__curunit->ufd==NULL && fk_open(DIR,UNF,a->ciunit) ) err(a->cierr,104,"due"); |
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22 | f__cf=f__curunit->ufd; |
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23 | if(f__curunit->ufmt) err(a->cierr,102,"cdue"); |
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24 | if(!f__curunit->useek) err(a->cierr,104,"cdue"); |
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25 | if(f__curunit->ufd==NULL) err(a->cierr,114,"cdue"); |
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26 | if(a->cirec <= 0) |
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27 | err(a->cierr,130,"due"); |
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28 | fseek(f__cf,(long)(a->cirec-1)*f__curunit->url,SEEK_SET); |
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29 | f__curunit->uend = 0; |
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30 | return(0); |
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31 | } |
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32 | #ifdef KR_headers |
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33 | integer s_rdue(a) cilist *a; |
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34 | #else |
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35 | integer s_rdue(cilist *a) |
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36 | #endif |
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37 | { |
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38 | int n; |
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39 | f__reading=1; |
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40 | if(n=c_due(a)) return(n); |
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41 | if(f__curunit->uwrt && f__nowreading(f__curunit)) |
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42 | err(a->cierr,errno,"read start"); |
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43 | return(0); |
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44 | } |
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45 | #ifdef KR_headers |
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46 | integer s_wdue(a) cilist *a; |
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47 | #else |
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48 | integer s_wdue(cilist *a) |
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49 | #endif |
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50 | { |
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51 | int n; |
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52 | f__reading=0; |
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53 | if(n=c_due(a)) return(n); |
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54 | if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit)) |
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55 | err(a->cierr,errno,"write start"); |
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56 | return(0); |
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57 | } |
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58 | integer e_rdue(Void) |
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59 | { |
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60 | f__init = 1; |
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61 | if(f__curunit->url==1 || f__recpos==f__curunit->url) |
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62 | return(0); |
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63 | fseek(f__cf,(long)(f__curunit->url-f__recpos),SEEK_CUR); |
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64 | if(ftell(f__cf)%f__curunit->url) |
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65 | err(f__elist->cierr,200,"syserr"); |
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66 | return(0); |
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67 | } |
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68 | integer e_wdue(Void) |
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69 | { |
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70 | f__init = 1; |
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71 | #ifdef ALWAYS_FLUSH |
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72 | if (fflush(f__cf)) |
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73 | err(f__elist->cierr,errno,"write end"); |
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74 | #endif |
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75 | return(e_rdue()); |
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76 | } |
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