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#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"
#ifdef KR_headers
extern char *malloc();
#else
#undef abs
#undef min
#undef max
#include "stdlib.h"
#endif
#include "fio.h"
#include "fmt.h" /* for struct syl */
/*global definitions*/
unit f__units[MXUNIT]; /*unit table*/
flag f__init; /*0 on entry, 1 after initializations*/
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;
flag f__external; /*1 if external io, 0 if internal */
#ifdef KR_headers
int (*f__doed)(),(*f__doned)();
int (*f__doend)(),(*f__donewrec)(),(*f__dorevert)();
int (*f__getn)(); /* for formatted input */
void (*f__putn)(); /* for formatted output */
#else
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);
#endif
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 */
};
#define MAXERR (sizeof(F_err)/sizeof(char *)+100)
#ifdef KR_headers
int f__canseek(f) FILE *f; /*SYSDEP*/
#else
int f__canseek(FILE *f) /*SYSDEP*/
#endif
{
#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
#ifdef KR_headers
f__fatal(n,s) char *s;
#else
f__fatal(int n, char *s)
#endif
{
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 (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__fmtbuf);
fprintf(stderr,"lately %s %s %s %s",f__reading?"reading":"writing",
f__sequential?"sequential":"direct",f__formatted?"formatted":"unformatted",
f__external?"external":"internal");
sig_die(" IO", 1);
}
/*initialization routine*/
VOID
f_init(Void)
{ unit *p;
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;
}
#ifdef KR_headers
int f__nowreading(x) unit *x;
#else
int f__nowreading(unit *x)
#endif
{
long 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;
}
#ifdef KR_headers
int f__nowwriting(x) unit *x;
#else
int f__nowwriting(unit *x)
#endif
{
long 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
#ifdef KR_headers
err__fl(f, m, s) int f, m; char *s;
#else
err__fl(int f, int m, char *s)
#endif
{
if (!f)
f__fatal(m, s);
if (f__doend)
(*f__doend)();
return errno = m;
}
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