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due.c
Go to the documentation of this file.00001 #include "f2c.h"
00002 #include "fio.h"
00003
00004 #ifdef KR_headers
00005 c_due(a) cilist *a;
00006 #else
00007 c_due(cilist *a)
00008 #endif
00009 {
00010 if(!f__init) f_init();
00011 if(a->ciunit>=MXUNIT || a->ciunit<0)
00012 err(a->cierr,101,"startio");
00013 f__sequential=f__formatted=f__recpos=0;
00014 f__external=1;
00015 f__curunit = &f__units[a->ciunit];
00016 f__elist=a;
00017 if(f__curunit->ufd==NULL && fk_open(DIR,UNF,a->ciunit) ) err(a->cierr,104,"due");
00018 f__cf=f__curunit->ufd;
00019 if(f__curunit->ufmt) err(a->cierr,102,"cdue")
00020 if(!f__curunit->useek) err(a->cierr,104,"cdue")
00021 if(f__curunit->ufd==NULL) err(a->cierr,114,"cdue")
00022 (void) fseek(f__cf,(long)(a->cirec-1)*f__curunit->url,SEEK_SET);
00023 f__curunit->uend = 0;
00024 return(0);
00025 }
00026 #ifdef KR_headers
00027 integer s_rdue(a) cilist *a;
00028 #else
00029 integer s_rdue(cilist *a)
00030 #endif
00031 {
00032 int n;
00033 if(n=c_due(a)) return(n);
00034 f__reading=1;
00035 if(f__curunit->uwrt && f__nowreading(f__curunit))
00036 err(a->cierr,errno,"read start");
00037 return(0);
00038 }
00039 #ifdef KR_headers
00040 integer s_wdue(a) cilist *a;
00041 #else
00042 integer s_wdue(cilist *a)
00043 #endif
00044 {
00045 int n;
00046 if(n=c_due(a)) return(n);
00047 f__reading=0;
00048 if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit))
00049 err(a->cierr,errno,"write start");
00050 return(0);
00051 }
00052 integer e_rdue(Void)
00053 {
00054 if(f__curunit->url==1 || f__recpos==f__curunit->url)
00055 return(0);
00056 (void) fseek(f__cf,(long)(f__curunit->url-f__recpos),SEEK_CUR);
00057 if(ftell(f__cf)%f__curunit->url)
00058 err(f__elist->cierr,200,"syserr");
00059 return(0);
00060 }
00061 integer e_wdue(Void)
00062 {
00063 #ifdef ALWAYS_FLUSH
00064 if (fflush(f__cf))
00065 err(f__elist->cierr,errno,"write end");
00066 #endif
00067 return(e_rdue());
00068 }
