diff options
Diffstat (limited to 'gcc/f/runtime/libI77/due.c')
| -rw-r--r-- | gcc/f/runtime/libI77/due.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/gcc/f/runtime/libI77/due.c b/gcc/f/runtime/libI77/due.c new file mode 100644 index 00000000000..dec58657b50 --- /dev/null +++ b/gcc/f/runtime/libI77/due.c @@ -0,0 +1,73 @@ +#include "f2c.h" +#include "fio.h" + +#ifdef KR_headers +c_due(a) cilist *a; +#else +c_due(cilist *a) +#endif +{ + if(f__init != 1) f_init(); + f__init = 3; + if(a->ciunit>=MXUNIT || a->ciunit<0) + err(a->cierr,101,"startio"); + f__sequential=f__formatted=f__recpos=0; + f__external=1; + f__curunit = &f__units[a->ciunit]; + f__elist=a; + if(f__curunit->ufd==NULL && fk_open(DIR,UNF,a->ciunit) ) err(a->cierr,104,"due"); + f__cf=f__curunit->ufd; + if(f__curunit->ufmt) err(a->cierr,102,"cdue"); + if(!f__curunit->useek) err(a->cierr,104,"cdue"); + if(f__curunit->ufd==NULL) err(a->cierr,114,"cdue"); + if(a->cirec <= 0) + err(a->cierr,130,"due"); + (void) fseek(f__cf,(long)(a->cirec-1)*f__curunit->url,SEEK_SET); + f__curunit->uend = 0; + return(0); +} +#ifdef KR_headers +integer s_rdue(a) cilist *a; +#else +integer s_rdue(cilist *a) +#endif +{ + int n; + f__reading=1; + if(n=c_due(a)) return(n); + if(f__curunit->uwrt && f__nowreading(f__curunit)) + err(a->cierr,errno,"read start"); + return(0); +} +#ifdef KR_headers +integer s_wdue(a) cilist *a; +#else +integer s_wdue(cilist *a) +#endif +{ + int n; + f__reading=0; + if(n=c_due(a)) return(n); + if(f__curunit->uwrt != 1 && f__nowwriting(f__curunit)) + err(a->cierr,errno,"write start"); + return(0); +} +integer e_rdue(Void) +{ + f__init = 1; + if(f__curunit->url==1 || f__recpos==f__curunit->url) + return(0); + (void) fseek(f__cf,(long)(f__curunit->url-f__recpos),SEEK_CUR); + if(ftell(f__cf)%f__curunit->url) + err(f__elist->cierr,200,"syserr"); + return(0); +} +integer e_wdue(Void) +{ + f__init = 1; +#ifdef ALWAYS_FLUSH + if (fflush(f__cf)) + err(f__elist->cierr,errno,"write end"); +#endif + return(e_rdue()); +} |