endfile.c File Reference

#include "f2c.h"
#include "fio.h"
#include "unistd.h"
#include "stdlib.h"
#include "string.h"

Include dependency graph for endfile.c:

Go to the source code of this file.

Defines
#define	FTRUNCATE   ftruncate
Functions
integer	f_end (alist *a)
int	t_runc (alist *a)
Variables
char *	f__r_mode []
char *	f__w_mode []

---

Define Documentation

#define FTRUNCATE   ftruncate

Referenced by t_runc().

---

Function Documentation

integer f_end

(

alist *

a

)

Definition at line 35 of file endfile.c.

References a, b, err, f__units, FOPEN, MXUNIT, NULL, t_runc(), and tf.

{
        unit *b;
        FILE *tf;

        if(a->aunit>=MXUNIT || a->aunit<0) err(a->aerr,101,"endfile");
        b = &f__units[a->aunit];
        if(b->ufd==NULL) {
                char nbuf[10];
                sprintf(nbuf,"fort.%ld",(long)a->aunit);
                if (tf = FOPEN(nbuf, f__w_mode[0]))
                        fclose(tf);
                return(0);
                }
        b->uend=1;
        return(b->useek ? t_runc(a) : 0);
}

Here is the call graph for this function:

int t_runc

(

alist *

a

)

Definition at line 79 of file endfile.c.

References a, b, done, err, f__cf, f__units, FOPEN, FREOPEN, FSEEK, FTELL, FTRUNCATE, NULL, OFF_T, SEEK_END, and tf.

Referenced by f_back(), f_clos(), f_end(), and f_rew().

{
        OFF_T loc, len;
        unit *b;
        int rc;
        FILE *bf;
#ifdef NO_TRUNCATE
        FILE *tf;
#endif

        b = &f__units[a->aunit];
        if(b->url)
                return(0);      /*don't truncate direct files*/
        loc=FTELL(bf = b->ufd);
        FSEEK(bf,(OFF_T)0,SEEK_END);
        len=FTELL(bf);
        if (loc >= len || b->useek == 0)
                return(0);
#ifdef NO_TRUNCATE
        if (b->ufnm == NULL)
                return 0;
        rc = 0;
        fclose(b->ufd);
        if (!loc) {
                if (!(bf = FOPEN(b->ufnm, f__w_mode[b->ufmt])))
                        rc = 1;
                if (b->uwrt)
                        b->uwrt = 1;
                goto done;
                }
        if (!(bf = FOPEN(b->ufnm, f__r_mode[0]))
         || !(tf = tmpfile())) {
#ifdef NON_UNIX_STDIO
 bad:
#endif
                rc = 1;
                goto done;
                }
        if (copy(bf, (long)loc, tf)) {
 bad1:
                rc = 1;
                goto done1;
                }
        if (!(bf = FREOPEN(b->ufnm, f__w_mode[0], bf)))
                goto bad1;
        rewind(tf);
        if (copy(tf, (long)loc, bf))
                goto bad1;
        b->uwrt = 1;
        b->urw = 2;
#ifdef NON_UNIX_STDIO
        if (b->ufmt) {
                fclose(bf);
                if (!(bf = FOPEN(b->ufnm, f__w_mode[3])))
                        goto bad;
                FSEEK(bf,(OFF_T)0,SEEK_END);
                b->urw = 3;
                }
#endif
done1:
        fclose(tf);
done:
        f__cf = b->ufd = bf;
#else /* NO_TRUNCATE */
        if (b->urw & 2)
                fflush(b->ufd); /* necessary on some Linux systems */
#ifndef FTRUNCATE
#define FTRUNCATE ftruncate
#endif
        rc = FTRUNCATE(fileno(b->ufd), loc);
        /* The following FSEEK is unnecessary on some systems, */
        /* but should be harmless. */
        FSEEK(b->ufd, (OFF_T)0, SEEK_END);
#endif /* NO_TRUNCATE */
        if (rc)
                err(a->aerr,111,"endfile");
        return 0;
        }

Here is the caller graph for this function:

---

Variable Documentation

char* f__r_mode[]

Definition at line 34 of file open.c.

Referenced by f__nowreading().

char * f__w_mode[]

Definition at line 35 of file open.c.

Referenced by f__nowreading(), and f__nowwriting().

---