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26 lines
730 B
C
26 lines
730 B
C
/* Parser interface */
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#define MAXSTACK 100
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typedef struct _stackentry {
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int s_state; /* State in current DFA */
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dfa *s_dfa; /* Current DFA */
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node *s_parent; /* Where to add next node */
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} stackentry;
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typedef struct _stack {
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stackentry *s_top; /* Top entry */
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stackentry s_base[MAXSTACK];/* Array of stack entries */
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/* NB The stack grows down */
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} stack;
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typedef struct {
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struct _stack p_stack; /* Stack of parser states */
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struct _grammar *p_grammar; /* Grammar to use */
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struct _node *p_tree; /* Top of parse tree */
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} parser_state;
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parser_state *newparser PROTO((struct _grammar *g, int start));
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void delparser PROTO((parser_state *ps));
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int addtoken PROTO((parser_state *ps, int type, char *str));
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