freebsd-dev/contrib/libf2c/libI77/open.c
2003-07-11 03:42:19 +00:00

302 lines
6.3 KiB
C

#include "config.h"
#include "f2c.h"
#include "fio.h"
#include <string.h>
#ifndef NON_POSIX_STDIO
#ifdef MSDOS
#include "io.h"
#else
#include "unistd.h" /* for access */
#endif
#endif
#undef abs
#undef min
#undef max
#include <stdlib.h>
extern int f__canseek (FILE *);
extern integer f_clos (cllist *);
#ifdef NON_ANSI_RW_MODES
char *f__r_mode[2] = { "r", "r" };
char *f__w_mode[4] = { "w", "w", "r+w", "r+w" };
#else
char *f__r_mode[2] = { "rb", "r" };
char *f__w_mode[4] = { "wb", "w", "r+b", "r+" };
#endif
static char f__buf0[400], *f__buf = f__buf0;
int f__buflen = (int) sizeof (f__buf0);
static void
f__bufadj (int n, int c)
{
unsigned int len;
char *nbuf, *s, *t, *te;
if (f__buf == f__buf0)
f__buflen = 1024;
while (f__buflen <= n)
f__buflen <<= 1;
len = (unsigned int) f__buflen;
if (len != f__buflen || !(nbuf = (char *) malloc (len)))
f__fatal (113, "malloc failure");
s = nbuf;
t = f__buf;
te = t + c;
while (t < te)
*s++ = *t++;
if (f__buf != f__buf0)
free (f__buf);
f__buf = nbuf;
}
int
f__putbuf (int c)
{
char *s, *se;
int n;
if (f__hiwater > f__recpos)
f__recpos = f__hiwater;
n = f__recpos + 1;
if (n >= f__buflen)
f__bufadj (n, f__recpos);
s = f__buf;
se = s + f__recpos;
if (c)
*se++ = c;
*se = 0;
for (;;)
{
fputs (s, f__cf);
s += strlen (s);
if (s >= se)
break; /* normally happens the first time */
putc (*s++, f__cf);
}
return 0;
}
void
x_putc (int c)
{
if (f__recpos >= f__buflen)
f__bufadj (f__recpos, f__buflen);
f__buf[f__recpos++] = c;
}
#define opnerr(f,m,s) \
do {if(f) {f__init &= ~2; errno= m;} else opn_err(m,s,a); return(m);} while(0)
static void
opn_err (int m, char *s, olist * a)
{
if (a->ofnm)
{
/* supply file name to error message */
if (a->ofnmlen >= f__buflen)
f__bufadj ((int) a->ofnmlen, 0);
g_char (a->ofnm, a->ofnmlen, f__curunit->ufnm = f__buf);
}
f__fatal (m, s);
}
integer
f_open (olist * a)
{
unit *b;
integer rv;
char buf[256], *s, *env;
cllist x;
int ufmt;
FILE *tf;
int fd, len;
#ifndef NON_UNIX_STDIO
int n;
#endif
if (f__init != 1)
f_init ();
f__external = 1;
if (a->ounit >= MXUNIT || a->ounit < 0)
err (a->oerr, 101, "open");
f__curunit = b = &f__units[a->ounit];
if (b->ufd)
{
if (a->ofnm == 0)
{
same:if (a->oblnk)
b->ublnk = *a->oblnk == 'z' || *a->oblnk == 'Z';
return (0);
}
#ifdef NON_UNIX_STDIO
if (b->ufnm
&& strlen (b->ufnm) == a->ofnmlen
&& !strncmp (b->ufnm, a->ofnm, (unsigned) a->ofnmlen))
goto same;
#else
g_char (a->ofnm, a->ofnmlen, buf);
if (f__inode (buf, &n) == b->uinode && n == b->udev)
goto same;
#endif
x.cunit = a->ounit;
x.csta = 0;
x.cerr = a->oerr;
if ((rv = f_clos (&x)) != 0)
return rv;
}
b->url = (int) a->orl;
b->ublnk = a->oblnk && (*a->oblnk == 'z' || *a->oblnk == 'Z');
if (a->ofm == 0)
if ((a->oacc) && (*a->oacc == 'D' || *a->oacc == 'd'))
b->ufmt = 0;
else
b->ufmt = 1;
else if (*a->ofm == 'f' || *a->ofm == 'F')
b->ufmt = 1;
else
b->ufmt = 0;
ufmt = b->ufmt;
#ifdef url_Adjust
if (b->url && !ufmt)
url_Adjust (b->url);
#endif
if (a->ofnm)
{
g_char (a->ofnm, a->ofnmlen, buf);
if (!buf[0])
opnerr (a->oerr, 107, "open");
}
else
sprintf (buf, "fort.%ld", (long) a->ounit);
b->uscrtch = 0;
b->uend = 0;
b->uwrt = 0;
b->ufd = 0;
b->urw = 3;
switch (a->osta ? *a->osta : 'u')
{
case 'o':
case 'O':
#ifdef NON_POSIX_STDIO
if (!(tf = fopen (buf, "r")))
opnerr (a->oerr, errno, "open");
fclose (tf);
#else
if (access (buf, 0))
opnerr (a->oerr, errno, "open");
#endif
break;
case 's':
case 'S':
b->uscrtch = 1;
#ifdef HAVE_MKSTEMP /* Allow use of TMPDIR preferentially. */
env = getenv ("TMPDIR");
if (!env)
env = getenv ("TEMP");
if (!env)
env = "/tmp";
len = strlen (env);
if (len > 256 - (int) sizeof ("/tmp.FXXXXXX"))
err (a->oerr, 132, "open");
strcpy (buf, env);
strcat (buf, "/tmp.FXXXXXX");
fd = mkstemp (buf);
if (fd == -1 || close (fd))
err (a->oerr, 132, "open");
#else /* ! defined (HAVE_MKSTEMP) */
#ifdef HAVE_TEMPNAM /* Allow use of TMPDIR preferentially. */
s = tempnam (0, buf);
if (strlen (s) >= sizeof (buf))
err (a->oerr, 132, "open");
(void) strcpy (buf, s);
free (s);
#else /* ! defined (HAVE_TEMPNAM) */
#ifdef HAVE_TMPNAM
tmpnam (buf);
#else
(void) strcpy (buf, "tmp.FXXXXXX");
(void) mktemp (buf);
#endif
#endif /* ! defined (HAVE_TEMPNAM) */
#endif /* ! defined (HAVE_MKSTEMP) */
goto replace;
case 'n':
case 'N':
#ifdef NON_POSIX_STDIO
if ((tf = fopen (buf, "r")) || (tf = fopen (buf, "a")))
{
fclose (tf);
opnerr (a->oerr, 128, "open");
}
#else
if (!access (buf, 0))
opnerr (a->oerr, 128, "open");
#endif
/* no break */
case 'r': /* Fortran 90 replace option */
case 'R':
replace:
if ((tf = fopen (buf, f__w_mode[0])))
fclose (tf);
}
b->ufnm = (char *) malloc ((unsigned int) (strlen (buf) + 1));
if (b->ufnm == NULL)
opnerr (a->oerr, 113, "no space");
(void) strcpy (b->ufnm, buf);
if ((s = a->oacc) && b->url)
ufmt = 0;
if (!(tf = fopen (buf, f__w_mode[ufmt | 2])))
{
if ((tf = fopen (buf, f__r_mode[ufmt])))
b->urw = 1;
else if ((tf = fopen (buf, f__w_mode[ufmt])))
{
b->uwrt = 1;
b->urw = 2;
}
else
err (a->oerr, errno, "open");
}
b->useek = f__canseek (b->ufd = tf);
#ifndef NON_UNIX_STDIO
if ((b->uinode = f__inode (buf, &b->udev)) == -1)
opnerr (a->oerr, 108, "open");
#endif
if (b->useek)
{
if (a->orl)
FSEEK (b->ufd, 0, SEEK_SET);
else if ((s = a->oacc) && (*s == 'a' || *s == 'A')
&& FSEEK (b->ufd, 0, SEEK_END))
opnerr (a->oerr, 129, "open");
}
return (0);
}
int
fk_open (int seq, int fmt, ftnint n)
{
char nbuf[10];
olist a;
int rtn;
int save_init;
(void) sprintf (nbuf, "fort.%ld", (long) n);
a.oerr = 1;
a.ounit = n;
a.ofnm = nbuf;
a.ofnmlen = strlen (nbuf);
a.osta = NULL;
a.oacc = seq == SEQ ? "s" : "d";
a.ofm = fmt == FMT ? "f" : "u";
a.orl = seq == DIR ? 1 : 0;
a.oblnk = NULL;
save_init = f__init;
f__init &= ~2;
rtn = f_open (&a);
f__init = save_init | 1;
return rtn;
}