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