276 lines
6.0 KiB
C
276 lines
6.0 KiB
C
#ifndef NON_UNIX_STDIO
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#include "sys/types.h"
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#include "sys/stat.h"
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#endif
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#include "f2c.h"
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#include "fio.h"
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#include "fmt.h" /* for struct syl */
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#include "rawio.h" /* for fcntl.h, fdopen */
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#ifdef NON_UNIX_STDIO
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#ifdef KR_headers
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extern char *malloc();
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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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#endif
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#endif
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/*global definitions*/
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unit f__units[MXUNIT]; /*unit table*/
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flag f__init; /*0 on entry, 1 after initializations*/
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cilist *f__elist; /*active external io list*/
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flag f__reading; /*1 if reading, 0 if writing*/
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flag f__cplus,f__cblank;
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char *f__fmtbuf;
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flag f__external; /*1 if external io, 0 if internal */
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#ifdef KR_headers
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int (*f__doed)(),(*f__doned)();
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int (*f__doend)(),(*f__donewrec)(),(*f__dorevert)();
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int (*f__getn)(),(*f__putn)(); /*for formatted io*/
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#else
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int (*f__getn)(void),(*f__putn)(int); /*for formatted io*/
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int (*f__doed)(struct syl*, char*, ftnlen),(*f__doned)(struct syl*);
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int (*f__dorevert)(void),(*f__donewrec)(void),(*f__doend)(void);
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#endif
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flag f__sequential; /*1 if sequential io, 0 if direct*/
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flag f__formatted; /*1 if formatted io, 0 if unformatted*/
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FILE *f__cf; /*current file*/
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unit *f__curunit; /*current unit*/
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int f__recpos; /*place in current record*/
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int f__cursor,f__scale;
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/*error messages*/
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char *F_err[] =
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{
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"error in format", /* 100 */
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"illegal unit number", /* 101 */
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"formatted io not allowed", /* 102 */
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"unformatted io not allowed", /* 103 */
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"direct io not allowed", /* 104 */
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"sequential io not allowed", /* 105 */
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"can't backspace file", /* 106 */
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"null file name", /* 107 */
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"can't stat file", /* 108 */
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"unit not connected", /* 109 */
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"off end of record", /* 110 */
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"truncation failed in endfile", /* 111 */
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"incomprehensible list input", /* 112 */
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"out of free space", /* 113 */
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"unit not connected", /* 114 */
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"read unexpected character", /* 115 */
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"bad logical input field", /* 116 */
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"bad variable type", /* 117 */
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"bad namelist name", /* 118 */
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"variable not in namelist", /* 119 */
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"no end record", /* 120 */
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"variable count incorrect", /* 121 */
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"subscript for scalar variable", /* 122 */
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"invalid array section", /* 123 */
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"substring out of bounds", /* 124 */
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"subscript out of bounds", /* 125 */
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"can't read file", /* 126 */
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"can't write file", /* 127 */
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"'new' file exists", /* 128 */
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"can't append to file" /* 129 */
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};
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#define MAXERR (sizeof(F_err)/sizeof(char *)+100)
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#ifdef KR_headers
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int f__canseek(f) FILE *f; /*SYSDEP*/
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#else
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int f__canseek(FILE *f) /*SYSDEP*/
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#endif
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{
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#ifdef NON_UNIX_STDIO
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return !isatty(fileno(f));
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#else
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struct stat x;
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if (fstat(fileno(f),&x) < 0)
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return(0);
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#ifdef S_IFMT
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switch(x.st_mode & S_IFMT) {
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case S_IFDIR:
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case S_IFREG:
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if(x.st_nlink > 0) /* !pipe */
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return(1);
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else
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return(0);
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case S_IFCHR:
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if(isatty(fileno(f)))
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return(0);
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return(1);
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#ifdef S_IFBLK
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case S_IFBLK:
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return(1);
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#endif
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}
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#else
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#ifdef S_ISDIR
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/* POSIX version */
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if (S_ISREG(x.st_mode) || S_ISDIR(x.st_mode)) {
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if(x.st_nlink > 0) /* !pipe */
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return(1);
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else
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return(0);
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}
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if (S_ISCHR(x.st_mode)) {
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if(isatty(fileno(f)))
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return(0);
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return(1);
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}
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if (S_ISBLK(x.st_mode))
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return(1);
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#else
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Help! How does fstat work on this system?
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#endif
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#endif
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return(0); /* who knows what it is? */
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#endif
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}
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void
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#ifdef KR_headers
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f__fatal(n,s) char *s;
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#else
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f__fatal(int n, char *s)
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#endif
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{
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if(n<100 && n>=0) perror(s); /*SYSDEP*/
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else if(n >= (int)MAXERR || n < -1)
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{ fprintf(stderr,"%s: illegal error number %d\n",s,n);
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}
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else if(n == -1) fprintf(stderr,"%s: end of file\n",s);
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else
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fprintf(stderr,"%s: %s\n",s,F_err[n-100]);
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if (f__curunit) {
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fprintf(stderr,"apparent state: unit %d ",f__curunit-f__units);
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fprintf(stderr, f__curunit->ufnm ? "named %s\n" : "(unnamed)\n",
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f__curunit->ufnm);
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}
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else
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fprintf(stderr,"apparent state: internal I/O\n");
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if (f__fmtbuf)
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fprintf(stderr,"last format: %s\n",f__fmtbuf);
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fprintf(stderr,"lately %s %s %s %s",f__reading?"reading":"writing",
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f__sequential?"sequential":"direct",f__formatted?"formatted":"unformatted",
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f__external?"external":"internal");
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sig_die(" IO", 1);
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}
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/*initialization routine*/
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VOID
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f_init(Void)
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{ unit *p;
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f__init=1;
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p= &f__units[0];
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p->ufd=stderr;
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p->useek=f__canseek(stderr);
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#ifdef NON_UNIX_STDIO
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setbuf(stderr, (char *)malloc(BUFSIZ));
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#else
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stderr->_flag &= ~_IONBF;
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#endif
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p->ufmt=1;
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p->uwrt=1;
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p = &f__units[5];
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p->ufd=stdin;
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p->useek=f__canseek(stdin);
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p->ufmt=1;
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p->uwrt=0;
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p= &f__units[6];
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p->ufd=stdout;
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p->useek=f__canseek(stdout);
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p->ufmt=1;
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p->uwrt=1;
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}
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#ifdef KR_headers
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int f__nowreading(x) unit *x;
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#else
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int f__nowreading(unit *x)
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#endif
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{
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long loc;
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int ufmt;
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extern char *f__r_mode[];
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if (!x->ufnm)
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goto cantread;
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ufmt = x->ufmt;
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loc=ftell(x->ufd);
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if(freopen(x->ufnm,f__r_mode[ufmt],x->ufd) == NULL) {
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cantread:
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errno = 126;
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return(1);
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}
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x->uwrt=0;
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(void) fseek(x->ufd,loc,SEEK_SET);
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return(0);
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}
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#ifdef KR_headers
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int f__nowwriting(x) unit *x;
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#else
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int f__nowwriting(unit *x)
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#endif
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{
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long loc;
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int ufmt;
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extern char *f__w_mode[];
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#ifndef NON_UNIX_STDIO
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int k;
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#endif
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if (!x->ufnm)
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goto cantwrite;
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ufmt = x->ufmt;
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#ifdef NON_UNIX_STDIO
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ufmt |= 2;
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#endif
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if (x->uwrt == 3) { /* just did write, rewind */
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#ifdef NON_UNIX_STDIO
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if (!(f__cf = x->ufd =
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freopen(x->ufnm,f__w_mode[ufmt],x->ufd)))
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#else
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if (close(creat(x->ufnm,0666)))
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#endif
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goto cantwrite;
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}
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else {
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loc=ftell(x->ufd);
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#ifdef NON_UNIX_STDIO
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if (!(f__cf = x->ufd =
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freopen(x->ufnm, f__w_mode[ufmt], x->ufd)))
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#else
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if (fclose(x->ufd) < 0
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|| (k = x->uwrt == 2 ? creat(x->ufnm,0666)
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: open(x->ufnm,O_WRONLY)) < 0
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|| (f__cf = x->ufd = fdopen(k,f__w_mode[ufmt])) == NULL)
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#endif
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{
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x->ufd = NULL;
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cantwrite:
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errno = 127;
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return(1);
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}
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(void) fseek(x->ufd,loc,SEEK_SET);
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}
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x->uwrt = 1;
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return(0);
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}
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int
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#ifdef KR_headers
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err__fl(f, m, s) int f, m; char *s;
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#else
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err__fl(int f, int m, char *s)
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#endif
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{
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if (!f)
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f__fatal(m, s);
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if (f__doend)
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(*f__doend)();
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return errno = m;
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}
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