46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
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#ifndef _CONTROL_H
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#define _CONTROL_H
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/* Stuff to do control structures. We keep a history (seperate from
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* the cshpar history, for now at least) of commands and their event
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* numbers, with a block considered as a statement. In a goto, the
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* first word in co_text is where to go, likewise for label. For
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* conditional controls, we have to call ft_getpnames and ft_evaluate
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* each time, since the dvec pointers will change... Also we should do
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* variable and backquote substitution each time... */
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struct control {
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int co_type; /* One of CO_* ... */
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wordlist *co_cond; /* if, while, dowhile */
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char *co_foreachvar; /* foreach */
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int co_numtimes; /* repeat, break & continue levels */
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wordlist *co_text; /* Ordinary text and foreach values. */
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struct control *co_parent; /* If this is inside a block. */
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struct control *co_children; /* The contents of this block. */
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struct control *co_elseblock; /* For if-then-else. */
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struct control *co_next;
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struct control *co_prev;
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} ;
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enum co_command {
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CO_UNFILLED,
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CO_STATEMENT,
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CO_WHILE,
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CO_DOWHILE,
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CO_IF,
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CO_FOREACH,
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CO_BREAK,
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CO_CONTINUE,
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CO_LABEL,
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CO_GOTO,
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CO_REPEAT
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};
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#define CONTROLSTACKSIZE 256 /* Better be enough. */
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extern struct control *control[CONTROLSTACKSIZE];
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extern struct control *cend[CONTROLSTACKSIZE];
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extern int stackp;
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#endif
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