1 files changed, 173 insertions, 0 deletions
diff --git a/usr.bin/f2c/gram.io b/usr.bin/f2c/gram.io
new file mode 100644
index 0000000..f1a6649
--- /dev/null
+++ b/usr.bin/f2c/gram.io
@@ -0,0 +1,173 @@
+  /*  Input/Output Statements */
+
+io:	  io1
+		{ endio(); }
+	;
+
+io1:	  iofmove ioctl
+	| iofmove unpar_fexpr
+		{ ioclause(IOSUNIT, $2); endioctl(); }
+	| iofmove SSTAR
+		{ ioclause(IOSUNIT, ENULL); endioctl(); }
+	| iofmove SPOWER
+		{ ioclause(IOSUNIT, IOSTDERR); endioctl(); }
+	| iofctl ioctl
+	| read ioctl
+		{ doio(CHNULL); }
+	| read infmt
+		{ doio(CHNULL); }
+	| read ioctl inlist
+		{ doio(revchain($3)); }
+	| read infmt SCOMMA inlist
+		{ doio(revchain($4)); }
+	| read ioctl SCOMMA inlist
+		{ doio(revchain($4)); }
+	| write ioctl
+		{ doio(CHNULL); }
+	| write ioctl outlist
+		{ doio(revchain($3)); }
+	| print
+		{ doio(CHNULL); }
+	| print SCOMMA outlist
+		{ doio(revchain($3)); }
+	;
+
+iofmove:   fmkwd end_spec in_ioctl
+	;
+
+fmkwd:	  SBACKSPACE
+		{ iostmt = IOBACKSPACE; }
+	| SREWIND
+		{ iostmt = IOREWIND; }
+	| SENDFILE
+		{ iostmt = IOENDFILE; }
+	;
+
+iofctl:  ctlkwd end_spec in_ioctl
+	;
+
+ctlkwd:	  SINQUIRE
+		{ iostmt = IOINQUIRE; }
+	| SOPEN
+		{ iostmt = IOOPEN; }
+	| SCLOSE
+		{ iostmt = IOCLOSE; }
+	;
+
+infmt:	  unpar_fexpr
+		{
+		ioclause(IOSUNIT, ENULL);
+		ioclause(IOSFMT, $1);
+		endioctl();
+		}
+	| SSTAR
+		{
+		ioclause(IOSUNIT, ENULL);
+		ioclause(IOSFMT, ENULL);
+		endioctl();
+		}
+	;
+
+ioctl:	  SLPAR fexpr SRPAR
+		{
+		  ioclause(IOSUNIT, $2);
+		  endioctl();
+		}
+	| SLPAR ctllist SRPAR
+		{ endioctl(); }
+	;
+
+ctllist:  ioclause
+	| ctllist SCOMMA ioclause
+	;
+
+ioclause:  fexpr
+		{ ioclause(IOSPOSITIONAL, $1); }
+	| SSTAR
+		{ ioclause(IOSPOSITIONAL, ENULL); }
+	| SPOWER
+		{ ioclause(IOSPOSITIONAL, IOSTDERR); }
+	| nameeq expr
+		{ ioclause($1, $2); }
+	| nameeq SSTAR
+		{ ioclause($1, ENULL); }
+	| nameeq SPOWER
+		{ ioclause($1, IOSTDERR); }
+	;
+
+nameeq:  SNAMEEQ
+		{ $$ = iocname(); }
+	;
+
+read:	  SREAD end_spec in_ioctl
+		{ iostmt = IOREAD; }
+	;
+
+write:	  SWRITE end_spec in_ioctl
+		{ iostmt = IOWRITE; }
+	;
+
+print:	  SPRINT end_spec fexpr in_ioctl
+		{
+		iostmt = IOWRITE;
+		ioclause(IOSUNIT, ENULL);
+		ioclause(IOSFMT, $3);
+		endioctl();
+		}
+	| SPRINT end_spec SSTAR in_ioctl
+		{
+		iostmt = IOWRITE;
+		ioclause(IOSUNIT, ENULL);
+		ioclause(IOSFMT, ENULL);
+		endioctl();
+		}
+	;
+
+inlist:	  inelt
+		{ $$ = mkchain((char *)$1, CHNULL); }
+	| inlist SCOMMA inelt
+		{ $$ = mkchain((char *)$3, $1); }
+	;
+
+inelt:	  lhs
+		{ $$ = (tagptr) $1; }
+	| SLPAR inlist SCOMMA dospec SRPAR
+		{ $$ = (tagptr) mkiodo($4,revchain($2)); }
+	;
+
+outlist:  uexpr
+		{ $$ = mkchain((char *)$1, CHNULL); }
+	| other
+		{ $$ = mkchain((char *)$1, CHNULL); }
+	| out2
+	;
+
+out2:	  uexpr SCOMMA uexpr
+		{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
+	| uexpr SCOMMA other
+		{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
+	| other SCOMMA uexpr
+		{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
+	| other SCOMMA other
+		{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
+	| out2  SCOMMA uexpr
+		{ $$ = mkchain((char *)$3, $1); }
+	| out2  SCOMMA other
+		{ $$ = mkchain((char *)$3, $1); }
+	;
+
+other:	  complex_const
+		{ $$ = (tagptr) $1; }
+	| SLPAR expr SRPAR
+		{ $$ = (tagptr) $2; }
+	| SLPAR uexpr SCOMMA dospec SRPAR
+		{ $$ = (tagptr) mkiodo($4, mkchain((char *)$2, CHNULL) ); }
+	| SLPAR other SCOMMA dospec SRPAR
+		{ $$ = (tagptr) mkiodo($4, mkchain((char *)$2, CHNULL) ); }
+	| SLPAR out2  SCOMMA dospec SRPAR
+		{ $$ = (tagptr) mkiodo($4, revchain($2)); }
+	;
+
+in_ioctl:
+		{ startioctl(); }
+	;