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#include "f2c.h"
#include "fio.h"
#include <sys/types.h>
#include "rawio.h"
#ifdef KR_headers
extern char *strcpy();
#else
#undef abs
#undef min
#undef max
#include <stdlib.h>
#include <string.h>
#endif
#ifdef NON_UNIX_STDIO
#ifndef unlink
#define unlink remove
#endif
#else
#if defined (MSDOS) && !defined (GO32)
#include "io.h"
#endif
#endif
#ifdef NON_UNIX_STDIO
extern char *f__r_mode[], *f__w_mode[];
#endif
#ifdef KR_headers
integer f_end(a) alist *a;
#else
integer f_end(alist *a)
#endif
{
unit *b;
if (f__init & 2)
f__fatal (131, "I/O recursion");
if(a->aunit>=MXUNIT || a->aunit<0) err(a->aerr,101,"endfile");
b = &f__units[a->aunit];
if(b->ufd==NULL) {
char nbuf[10];
(void) sprintf(nbuf,"fort.%ld",a->aunit);
#ifdef NON_UNIX_STDIO
{ FILE *tf;
if (tf = fopen(nbuf, f__w_mode[0]))
fclose(tf);
}
#else
close(creat(nbuf, 0666));
#endif
return(0);
}
b->uend=1;
return(b->useek ? t_runc(a) : 0);
}
static int
#ifdef NON_UNIX_STDIO
#ifdef KR_headers
copy(from, len, to) char *from, *to; register long len;
#else
copy(FILE *from, register long len, FILE *to)
#endif
{
int k, len1;
char buf[BUFSIZ];
while(fread(buf, len1 = len > BUFSIZ ? BUFSIZ : (int)len, 1, from)) {
if (!fwrite(buf, len1, 1, to))
return 1;
if ((len -= len1) <= 0)
break;
}
return 0;
}
#else
#ifdef KR_headers
copy(from, len, to) char *from, *to; register long len;
#else
copy(char *from, register long len, char *to)
#endif
{
register size_t n;
int k, rc = 0, tmp;
char buf[BUFSIZ];
if ((k = open(from, O_RDONLY)) < 0)
return 1;
if ((tmp = creat(to,0666)) < 0)
return 1;
while((n = read(k, buf, (size_t) (len > BUFSIZ ? BUFSIZ : (int)len))) > 0) {
if (write(tmp, buf, n) != n)
{ rc = 1; break; }
if ((len -= n) <= 0)
break;
}
close(k);
close(tmp);
return n < 0 ? 1 : rc;
}
#endif
#ifndef L_tmpnam
#define L_tmpnam 16
#endif
int
#ifdef KR_headers
t_runc(a) alist *a;
#else
t_runc(alist *a)
#endif
{
char nm[L_tmpnam+12]; /* extra space in case L_tmpnam is tiny */
long loc, len;
unit *b;
#ifdef NON_UNIX_STDIO
FILE *bf, *tf;
#else
FILE *bf;
#endif
int rc = 0;
b = &f__units[a->aunit];
if(b->url)
return(0); /*don't truncate direct files*/
loc=ftell(bf = b->ufd);
fseek(bf,0L,SEEK_END);
len=ftell(bf);
if (loc >= len || b->useek == 0 || b->ufnm == NULL)
return(0);
#ifdef NON_UNIX_STDIO
fclose(b->ufd);
#else
rewind(b->ufd); /* empty buffer */
#endif
if (!loc) {
#ifdef NON_UNIX_STDIO
if (!(bf = fopen(b->ufnm, f__w_mode[b->ufmt])))
#else
if (close(creat(b->ufnm,0666)))
#endif
rc = 1;
if (b->uwrt)
b->uwrt = 1;
goto done;
}
#ifdef _POSIX_SOURCE
tmpnam(nm);
#else
strcpy(nm,"tmp.FXXXXXX");
mktemp(nm);
#endif
#ifdef NON_UNIX_STDIO
if (!(bf = fopen(b->ufnm, f__r_mode[0]))) {
bad:
rc = 1;
goto done;
}
if (!(tf = fopen(nm, f__w_mode[0])))
goto bad;
if (copy(bf, loc, tf)) {
bad1:
rc = 1;
goto done1;
}
if (!(bf = freopen(b->ufnm, f__w_mode[0], bf)))
goto bad1;
if (!(tf = freopen(nm, f__r_mode[0], tf)))
goto bad1;
if (copy(tf, loc, bf))
goto bad1;
if (f__w_mode[0] != f__w_mode[b->ufmt]) {
if (!(bf = freopen(b->ufnm, f__w_mode[b->ufmt|2], bf)))
goto bad1;
fseek(bf, loc, SEEK_SET);
}
done1:
fclose(tf);
unlink(nm);
done:
f__cf = b->ufd = bf;
#else
if (copy(b->ufnm, loc, nm)
|| copy(nm, loc, b->ufnm))
rc = 1;
unlink(nm);
fseek(b->ufd, loc, SEEK_SET);
done:
#endif
if (rc)
err(a->aerr,111,"endfile");
return 0;
}
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