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sue.c
Go to the documentation of this file.00001 #include "f2c.h"
00002 #include "fio.h"
00003 extern uiolen f__reclen;
00004 long f__recloc;
00005
00006 #ifdef KR_headers
00007 c_sue(a) cilist *a;
00008 #else
00009 c_sue(cilist *a)
00010 #endif
00011 {
00012 if(a->ciunit >= MXUNIT || a->ciunit < 0)
00013 err(a->cierr,101,"startio");
00014 f__external=f__sequential=1;
00015 f__formatted=0;
00016 f__curunit = &f__units[a->ciunit];
00017 f__elist=a;
00018 if(f__curunit->ufd==NULL && fk_open(SEQ,UNF,a->ciunit))
00019 err(a->cierr,114,"sue");
00020 f__cf=f__curunit->ufd;
00021 if(f__curunit->ufmt) err(a->cierr,103,"sue")
00022 if(!f__curunit->useek) err(a->cierr,103,"sue")
00023 return(0);
00024 }
00025 #ifdef KR_headers
00026 integer s_rsue(a) cilist *a;
00027 #else
00028 integer s_rsue(cilist *a)
00029 #endif
00030 {
00031 int n;
00032 if(!f__init) f_init();
00033 f__reading=1;
00034 if(n=c_sue(a)) return(n);
00035 f__recpos=0;
00036 if(f__curunit->uwrt && f__nowreading(f__curunit))
00037 err(a->cierr, errno, "read start");
00038 if(fread((char *)&f__reclen,sizeof(uiolen),1,f__cf)
00039 != 1)
00040 { if(feof(f__cf))
00041 { f__curunit->uend = 1;
00042 err(a->ciend, EOF, "start");
00043 }
00044 clearerr(f__cf);
00045 err(a->cierr, errno, "start");
00046 }
00047 return(0);
00048 }
00049 #ifdef KR_headers
00050 integer s_wsue(a) cilist *a;
00051 #else
00052 integer s_wsue(cilist *a)
00053 #endif
00054 {
00055 int n;
00056 if(!f__init) f_init();
00057 if(n=c_sue(a)) return(n);
00058 f__reading=0;
00059 f__reclen=0;
00060 if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit))
00061 err(a->cierr, errno, "write start");
00062 f__recloc=ftell(f__cf);
00063 (void) fseek(f__cf,(long)sizeof(uiolen),SEEK_CUR);
00064 return(0);
00065 }
00066 integer e_wsue(Void)
00067 { long loc;
00068 fwrite((char *)&f__reclen,sizeof(uiolen),1,f__cf);
00069 #ifdef ALWAYS_FLUSH
00070 if (fflush(f__cf))
00071 err(f__elist->cierr, errno, "write end");
00072 #endif
00073 loc=ftell(f__cf);
00074 fseek(f__cf,f__recloc,SEEK_SET);
00075 fwrite((char *)&f__reclen,sizeof(uiolen),1,f__cf);
00076 fseek(f__cf,loc,SEEK_SET);
00077 return(0);
00078 }
00079 integer e_rsue(Void)
00080 {
00081 (void) fseek(f__cf,(long)(f__reclen-f__recpos+sizeof(uiolen)),SEEK_CUR);
00082 return(0);
00083 }
