home *** CD-ROM | disk | FTP | other *** search
- #include "f2c.h"
- #include "fio.h"
- #include "fmt.h"
- extern int rd_ed(),rd_ned(),y_getc(),y_putc(),y_err();
- extern int y_rev(), y_rsk(), y_newrec();
- extern int w_ed(),w_ned();
- integer s_rdfe(a) cilist *a;
- {
- int n;
- if(!init) f_init();
- if(n=c_dfe(a))return(n);
- reading=1;
- if(curunit->uwrt && nowreading(curunit))
- err(a->cierr,errno,"read start");
- getn = y_getc;
- doed = rd_ed;
- doned = rd_ned;
- dorevert = donewrec = y_err;
- doend = y_rsk;
- if(pars_f(fmtbuf)<0)
- err(a->cierr,100,"read start");
- fmt_bg();
- return(0);
- }
- integer s_wdfe(a) cilist *a;
- {
- int n;
- if(!init) f_init();
- if(n=c_dfe(a)) return(n);
- reading=0;
- if(curunit->uwrt != 1 && nowwriting(curunit))
- err(a->cierr,errno,"startwrt");
- putn = y_putc;
- doed = w_ed;
- doned= w_ned;
- dorevert = y_err;
- donewrec = y_newrec;
- doend = y_rev;
- if(pars_f(fmtbuf)<0)
- err(a->cierr,100,"startwrt");
- fmt_bg();
- return(0);
- }
- integer e_rdfe()
- {
- (void) en_fio();
- return(0);
- }
- integer e_wdfe()
- {
- (void) en_fio();
- return(0);
- }
- c_dfe(a) cilist *a;
- {
- sequential=0;
- formatted=external=1;
- elist=a;
- cursor=scale=recpos=0;
- if(a->ciunit>MXUNIT || a->ciunit<0)
- err(a->cierr,101,"startchk");
- curunit = &units[a->ciunit];
- if(curunit->ufd==NULL && fk_open(DIR,FMT,a->ciunit))
- err(a->cierr,104,"dfe");
- cf=curunit->ufd;
- if(!curunit->ufmt) err(a->cierr,102,"dfe")
- if(!curunit->useek) err(a->cierr,104,"dfe")
- fmtbuf=a->cifmt;
- (void) fseek(cf,(long)curunit->url * (a->cirec-1),SEEK_SET);
- curunit->uend = 0;
- return(0);
- }
- y_rsk()
- {
- if(curunit->uend || curunit->url <= recpos
- || curunit->url == 1) return 0;
- do {
- getc(cf);
- } while(++recpos < curunit->url);
- return 0;
- }
- y_getc()
- {
- int ch;
- if(curunit->uend) return(-1);
- if((ch=getc(cf))!=EOF)
- {
- recpos++;
- if(curunit->url>=recpos ||
- curunit->url==1)
- return(ch);
- else return(' ');
- }
- if(feof(cf))
- {
- curunit->uend=1;
- errno=0;
- return(-1);
- }
- err(elist->cierr,errno,"readingd");
- }
- y_putc(c)
- {
- recpos++;
- if(recpos <= curunit->url || curunit->url==1)
- putc(c,cf);
- else
- err(elist->cierr,110,"dout");
- return(0);
- }
- y_rev()
- { /*what about work done?*/
- if(curunit->url==1 || recpos==curunit->url)
- return(0);
- while(recpos<curunit->url)
- (*putn)(' ');
- recpos=0;
- return(0);
- }
- y_err()
- {
- err(elist->cierr, 110, "dfe");
- }
-
- y_newrec()
- {
- if(curunit->url == 1 || recpos == curunit->url) {
- hiwater = recpos = cursor = 0;
- return(1);
- }
- if(hiwater > recpos)
- recpos = hiwater;
- y_rev();
- hiwater = cursor = 0;
- return(1);
- }
-