173 lines
3.2 KiB
Io
173 lines
3.2 KiB
Io
/* Input/Output Statements */
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io: io1
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{ endio(); }
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;
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io1: iofmove ioctl
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| iofmove unpar_fexpr
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{ ioclause(IOSUNIT, $2); endioctl(); }
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| iofmove SSTAR
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{ ioclause(IOSUNIT, ENULL); endioctl(); }
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| iofmove SPOWER
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{ ioclause(IOSUNIT, IOSTDERR); endioctl(); }
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| iofctl ioctl
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| read ioctl
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{ doio(CHNULL); }
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| read infmt
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{ doio(CHNULL); }
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| read ioctl inlist
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{ doio(revchain($3)); }
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| read infmt SCOMMA inlist
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{ doio(revchain($4)); }
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| read ioctl SCOMMA inlist
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{ doio(revchain($4)); }
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| write ioctl
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{ doio(CHNULL); }
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| write ioctl outlist
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{ doio(revchain($3)); }
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| print
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{ doio(CHNULL); }
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| print SCOMMA outlist
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{ doio(revchain($3)); }
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;
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iofmove: fmkwd end_spec in_ioctl
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;
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fmkwd: SBACKSPACE
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{ iostmt = IOBACKSPACE; }
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| SREWIND
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{ iostmt = IOREWIND; }
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| SENDFILE
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{ iostmt = IOENDFILE; }
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;
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iofctl: ctlkwd end_spec in_ioctl
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;
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ctlkwd: SINQUIRE
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{ iostmt = IOINQUIRE; }
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| SOPEN
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{ iostmt = IOOPEN; }
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| SCLOSE
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{ iostmt = IOCLOSE; }
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;
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infmt: unpar_fexpr
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{
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ioclause(IOSUNIT, ENULL);
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ioclause(IOSFMT, $1);
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endioctl();
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}
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| SSTAR
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{
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ioclause(IOSUNIT, ENULL);
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ioclause(IOSFMT, ENULL);
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endioctl();
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}
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;
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ioctl: SLPAR fexpr SRPAR
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{
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ioclause(IOSUNIT, $2);
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endioctl();
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}
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| SLPAR ctllist SRPAR
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{ endioctl(); }
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;
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ctllist: ioclause
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| ctllist SCOMMA ioclause
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;
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ioclause: fexpr
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{ ioclause(IOSPOSITIONAL, $1); }
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| SSTAR
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{ ioclause(IOSPOSITIONAL, ENULL); }
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| SPOWER
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{ ioclause(IOSPOSITIONAL, IOSTDERR); }
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| nameeq expr
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{ ioclause($1, $2); }
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| nameeq SSTAR
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{ ioclause($1, ENULL); }
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| nameeq SPOWER
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{ ioclause($1, IOSTDERR); }
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;
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nameeq: SNAMEEQ
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{ $$ = iocname(); }
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;
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read: SREAD end_spec in_ioctl
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{ iostmt = IOREAD; }
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;
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write: SWRITE end_spec in_ioctl
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{ iostmt = IOWRITE; }
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;
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print: SPRINT end_spec fexpr in_ioctl
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{
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iostmt = IOWRITE;
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ioclause(IOSUNIT, ENULL);
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ioclause(IOSFMT, $3);
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endioctl();
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}
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| SPRINT end_spec SSTAR in_ioctl
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{
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iostmt = IOWRITE;
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ioclause(IOSUNIT, ENULL);
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ioclause(IOSFMT, ENULL);
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endioctl();
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}
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;
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inlist: inelt
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{ $$ = mkchain((char *)$1, CHNULL); }
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| inlist SCOMMA inelt
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{ $$ = mkchain((char *)$3, $1); }
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;
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inelt: lhs
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{ $$ = (tagptr) $1; }
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| SLPAR inlist SCOMMA dospec SRPAR
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{ $$ = (tagptr) mkiodo($4,revchain($2)); }
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;
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outlist: uexpr
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{ $$ = mkchain((char *)$1, CHNULL); }
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| other
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{ $$ = mkchain((char *)$1, CHNULL); }
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| out2
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;
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out2: uexpr SCOMMA uexpr
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{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
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| uexpr SCOMMA other
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{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
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| other SCOMMA uexpr
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{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
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| other SCOMMA other
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{ $$ = mkchain((char *)$3, mkchain((char *)$1, CHNULL) ); }
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| out2 SCOMMA uexpr
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{ $$ = mkchain((char *)$3, $1); }
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| out2 SCOMMA other
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{ $$ = mkchain((char *)$3, $1); }
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;
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other: complex_const
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{ $$ = (tagptr) $1; }
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| SLPAR expr SRPAR
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{ $$ = (tagptr) $2; }
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| SLPAR uexpr SCOMMA dospec SRPAR
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{ $$ = (tagptr) mkiodo($4, mkchain((char *)$2, CHNULL) ); }
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| SLPAR other SCOMMA dospec SRPAR
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{ $$ = (tagptr) mkiodo($4, mkchain((char *)$2, CHNULL) ); }
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| SLPAR out2 SCOMMA dospec SRPAR
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{ $$ = (tagptr) mkiodo($4, revchain($2)); }
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;
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in_ioctl:
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{ startioctl(); }
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;
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