1 /* 2 char id_fgetc[] = "@(#)fgetc_.c 1.2"; 3 * 4 * get a character from a logical unit bypassing formatted I/O 5 * 6 * calling sequence: 7 * integer fgetc 8 * ierror = fgetc (unit, char) 9 * where: 10 * char will return a character from logical unit 11 * ierror will be 0 if successful; a system error code otherwise. 12 */ 13 14 #include "../libI77/fiodefs.h" 15 #include "../libI77/f_errno.h" 16 17 extern unit units[]; /* logical units table from iolib */ 18 19 long fgetc_(u, c, clen) 20 long *u; char *c; long clen; 21 { 22 int i; 23 24 if (*u < 0 || *u >= MXUNIT) 25 return((long)(errno=F_ERUNIT)); 26 if (!units[*u].ufd) 27 return((long)(errno=F_ERNOPEN)); 28 if ((i = getc (units[*u].ufd)) < 0) 29 { 30 if (feof(units[*u].ufd)) 31 return(-1L); 32 i = errno; 33 clearerr(units[*u].ufd); 34 return((long)i); 35 } 36 *c = i & 0177; 37 return(0L); 38 } 39