1 /* $RCSfile: cmd.h,v $$Revision: 4.0.1.1 $$Date: 91/06/07 10:28:50 $
3 * Copyright (c) 1991, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
9 * Revision 4.0.1.1 91/06/07 10:28:50 lwall
10 * patch4: new copyright notice
11 * patch4: length($`), length($&), length($') now optimized to avoid string copy
13 * Revision 4.0 91/03/20 01:04:34 lwall
25 #define C_ELSIF 7 /* temporary--turns into an IF + ELSE */
26 #define C_CSWITCH 8 /* created by switch optimization in block_head() */
27 #define C_NSWITCH 9 /* likewise */
31 extern char *cmdname[];
47 #endif /* DEBUGGING */
49 #define CF_OPTIMIZE 077 /* type of optimization */
50 #define CF_FIRSTNEG 0100/* conditional is ($register NE 'string') */
51 #define CF_NESURE 0200 /* if short doesn't match we're sure */
52 #define CF_EQSURE 0400 /* if short does match we're sure */
53 #define CF_COND 01000 /* test c_expr as conditional first, if not null. */
54 /* Set for everything except do {} while currently */
55 #define CF_LOOP 02000 /* loop on the c_expr conditional (loop modifiers) */
56 #define CF_INVERT 04000 /* it's an "unless" or an "until" */
57 #define CF_ONCE 010000 /* we've already pushed the label on the stack */
58 #define CF_FLIP 020000 /* on a match do flipflop */
59 #define CF_TERM 040000 /* value of this cmd might be returned */
60 #define CF_DBSUB 0100000 /* this is an inserted cmd for debugging */
62 #define CFT_FALSE 0 /* c_expr is always false */
63 #define CFT_TRUE 1 /* c_expr is always true */
64 #define CFT_REG 2 /* c_expr is a simple register */
65 #define CFT_ANCHOR 3 /* c_expr is an anchored search /^.../ */
66 #define CFT_STROP 4 /* c_expr is a string comparison */
67 #define CFT_SCAN 5 /* c_expr is an unanchored search /.../ */
68 #define CFT_GETS 6 /* c_expr is <filehandle> */
69 #define CFT_EVAL 7 /* c_expr is not optimized, so call eval() */
70 #define CFT_UNFLIP 8 /* 2nd half of range not optimized */
71 #define CFT_CHOP 9 /* c_expr is a chop on a register */
72 #define CFT_ARRAY 10 /* this is a foreach loop */
73 #define CFT_INDGETS 11 /* c_expr is <$variable> */
74 #define CFT_NUMOP 12 /* c_expr is a numeric comparison */
75 #define CFT_CCLASS 13 /* c_expr must start with one of these characters */
76 #define CFT_D0 14 /* no special breakpoint at this line */
77 #define CFT_D1 15 /* possible special breakpoint at this line */
81 extern char *cmdopt[];
101 #endif /* DEBUGGING */
104 STAB *ac_stab; /* a symbol table entry */
105 ARG *ac_expr; /* any associated expression */
109 CMD *cc_true; /* normal code to do on if and while */
110 CMD *cc_alt; /* else cmd ptr or continue code */
114 CMD **sc_next; /* array of pointers to commands */
115 short sc_offset; /* first value - 1 */
116 short sc_max; /* last value + 1 */
120 CMD *c_next; /* the next command at this level */
121 ARG *c_expr; /* conditional expression */
122 CMD *c_head; /* head of this command list */
123 STR *c_short; /* string to match as shortcut */
124 STAB *c_stab; /* a symbol table entry, mostly for fp */
125 SPAT *c_spat; /* pattern used by optimization */
126 char *c_label; /* label for this construct */
128 struct acmd acmd; /* normal command */
129 struct ccmd ccmd; /* compound command */
130 struct scmd scmd; /* switch command */
132 short c_slen; /* len of c_short, if not null */
133 VOLATILE short c_flags; /* optimization flags--see above */
134 HASH *c_stash; /* package line was compiled in */
135 STAB *c_filestab; /* file the following line # is from */
136 line_t c_line; /* line # of this command */
137 char c_type; /* what this command does */
140 #define Nullcmd Null(CMD*)
141 #define Nullcsv Null(CSV*)
143 EXT CMD * VOLATILE main_root INIT(Nullcmd);
144 EXT CMD * VOLATILE eval_root INIT(Nullcmd);
147 EXT CMD * VOLATILE curcmd INIT(&compiling);
148 EXT CSV * VOLATILE curcsv INIT(Nullcsv);