gcc/libf2c/libI77/err.c

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#include "config.h"
#ifndef NON_UNIX_STDIO
#define _INCLUDE_POSIX_SOURCE /* for HP-UX */
#define _INCLUDE_XOPEN_SOURCE /* for HP-UX */
#include <sys/types.h>
#include <sys/stat.h>
#endif
#include "f2c.h"
#undef abs
#undef min
#undef max
#include <stdlib.h>
#include "fio.h"
#include "fmt.h" /* for struct syl */
/*global definitions*/
unit f__units[MXUNIT]; /*unit table */
int f__init; /*bit 0: set after initializations;
bit 1: set during I/O involving returns to
caller of library (or calls to user code) */
cilist *f__elist; /*active external io list */
icilist *f__svic; /*active internal io list */
flag f__reading; /*1 if reading, 0 if writing */
flag f__cplus, f__cblank;
char *f__fmtbuf;
int f__fmtlen;
flag f__external; /*1 if external io, 0 if internal */
int (*f__getn) (void); /* for formatted input */
void (*f__putn) (int); /* for formatted output */
int (*f__doed) (struct syl *, char *, ftnlen), (*f__doned) (struct syl *);
int (*f__dorevert) (void), (*f__donewrec) (void), (*f__doend) (void);
flag f__sequential; /*1 if sequential io, 0 if direct */
flag f__formatted; /*1 if formatted io, 0 if unformatted */
FILE *f__cf; /*current file */
unit *f__curunit; /*current unit */
int f__recpos; /*place in current record */
int f__cursor, f__hiwater, f__scale;
char *f__icptr;
/*error messages*/
char *F_err[] = {
"error in format", /* 100 */
"illegal unit number", /* 101 */
"formatted io not allowed", /* 102 */
"unformatted io not allowed", /* 103 */
"direct io not allowed", /* 104 */
"sequential io not allowed", /* 105 */
"can't backspace file", /* 106 */
"null file name", /* 107 */
"can't stat file", /* 108 */
"unit not connected", /* 109 */
"off end of record", /* 110 */
"truncation failed in endfile", /* 111 */
"incomprehensible list input", /* 112 */
"out of free space", /* 113 */
"unit not connected", /* 114 */
"read unexpected character", /* 115 */
"bad logical input field", /* 116 */
"bad variable type", /* 117 */
"bad namelist name", /* 118 */
"variable not in namelist", /* 119 */
"no end record", /* 120 */
"variable count incorrect", /* 121 */
"subscript for scalar variable", /* 122 */
"invalid array section", /* 123 */
"substring out of bounds", /* 124 */
"subscript out of bounds", /* 125 */
"can't read file", /* 126 */
"can't write file", /* 127 */
"'new' file exists", /* 128 */
"can't append to file", /* 129 */
"non-positive record number", /* 130 */
"I/O started while already doing I/O", /* 131 */
"Temporary file name (TMPDIR?) too long" /* 132 */
};
#define MAXERR (sizeof(F_err)/sizeof(char *)+100)
int
f__canseek (FILE * f) /*SYSDEP*/
{
#ifdef NON_UNIX_STDIO
return !isatty (fileno (f));
#else
struct stat x;
if (fstat (fileno (f), &x) < 0)
return (0);
#ifdef S_IFMT
switch (x.st_mode & S_IFMT)
{
case S_IFDIR:
case S_IFREG:
if (x.st_nlink > 0) /* !pipe */
return (1);
else
return (0);
case S_IFCHR:
if (isatty (fileno (f)))
return (0);
return (1);
#ifdef S_IFBLK
case S_IFBLK:
return (1);
#endif
}
#else
#ifdef S_ISDIR
/* POSIX version */
if (S_ISREG (x.st_mode) || S_ISDIR (x.st_mode))
{
if (x.st_nlink > 0) /* !pipe */
return (1);
else
return (0);
}
if (S_ISCHR (x.st_mode))
{
if (isatty (fileno (f)))
return (0);
return (1);
}
if (S_ISBLK (x.st_mode))
return (1);
#else
Help ! How does fstat work on this system ?
#endif
#endif
return (0); /* who knows what it is? */
#endif
}
void
f__fatal (int n, char *s)
{
static int dead = 0;
if (n < 100 && n >= 0)
perror (s);
/*SYSDEP*/
else if (n >= (int) MAXERR || n < -1)
{
fprintf (stderr, "%s: illegal error number %d\n", s, n);
}
else if (n == -1)
fprintf (stderr, "%s: end of file\n", s);
else
fprintf (stderr, "%s: %s\n", s, F_err[n - 100]);
if (dead)
{
fprintf (stderr, "(libf2c f__fatal already called, aborting.)");
abort ();
}
dead = 1;
if (f__init & 1)
{
if (f__curunit)
{
fprintf (stderr, "apparent state: unit %d ",
(int) (f__curunit - f__units));
fprintf (stderr, f__curunit->ufnm ? "named %s\n" : "(unnamed)\n",
f__curunit->ufnm);
}
else
fprintf (stderr, "apparent state: internal I/O\n");
if (f__fmtbuf)
fprintf (stderr, "last format: %.*s\n", f__fmtlen, f__fmtbuf);
fprintf (stderr, "lately %s %s %s %s",
f__reading ? "reading" : "writing",
f__sequential ? "sequential" : "direct",
f__formatted ? "formatted" : "unformatted",
f__external ? "external" : "internal");
}
f__init &= ~2; /* No longer doing I/O (no more user code to be called). */
sig_die (" IO", 1);
}
/*initialization routine*/
void
f_init (void)
{
unit *p;
if (f__init & 2)
f__fatal (131, "I/O recursion");
f__init = 1;
p = &f__units[0];
p->ufd = stderr;
p->useek = f__canseek (stderr);
p->ufmt = 1;
p->uwrt = 1;
p = &f__units[5];
p->ufd = stdin;
p->useek = f__canseek (stdin);
p->ufmt = 1;
p->uwrt = 0;
p = &f__units[6];
p->ufd = stdout;
p->useek = f__canseek (stdout);
p->ufmt = 1;
p->uwrt = 1;
}
int
f__nowreading (unit * x)
{
off_t loc;
int ufmt, urw;
extern char *f__r_mode[], *f__w_mode[];
if (x->urw & 1)
goto done;
if (!x->ufnm)
goto cantread;
ufmt = x->url ? 0 : x->ufmt;
loc = FTELL (x->ufd);
urw = 3;
if (!freopen (x->ufnm, f__w_mode[ufmt | 2], x->ufd))
{
urw = 1;
if (!freopen (x->ufnm, f__r_mode[ufmt], x->ufd))
{
cantread:
errno = 126;
return 1;
}
}
FSEEK (x->ufd, loc, SEEK_SET);
x->urw = urw;
done:
x->uwrt = 0;
return 0;
}
int
f__nowwriting (unit * x)
{
off_t loc;
int ufmt;
extern char *f__w_mode[];
if (x->urw & 2)
goto done;
if (!x->ufnm)
goto cantwrite;
ufmt = x->url ? 0 : x->ufmt;
if (x->uwrt == 3)
{ /* just did write, rewind */
if (!(f__cf = x->ufd = freopen (x->ufnm, f__w_mode[ufmt], x->ufd)))
goto cantwrite;
x->urw = 2;
}
else
{
loc = FTELL (x->ufd);
if (!(f__cf = x->ufd = freopen (x->ufnm, f__w_mode[ufmt |= 2], x->ufd)))
{
x->ufd = NULL;
cantwrite:
errno = 127;
return (1);
}
x->urw = 3;
FSEEK (x->ufd, loc, SEEK_SET);
}
done:
x->uwrt = 1;
return 0;
}
int
err__fl (int f, int m, char *s)
{
if (!f)
f__fatal (m, s);
if (f__doend)
(*f__doend) ();
f__init &= ~2;
return errno = m;
}