53 lines
840 B
C
53 lines
840 B
C
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/* Grammar subroutines needed by parser */
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#include "PROTO.h"
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#define NULL 0
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#include "assert.h"
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#include "grammar.h"
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#include "token.h"
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/* Return the DFA for the given type */
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dfa *
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finddfa(g, type)
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grammar *g;
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register int type;
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{
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register int i;
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register dfa *d;
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for (i = g->g_ndfas, d = g->g_dfa; --i >= 0; d++) {
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if (d->d_type == type)
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return d;
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}
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assert(0);
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/* NOTREACHED */
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}
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char *
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labelrepr(lb)
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label *lb;
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{
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static char buf[100];
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if (lb->lb_type == ENDMARKER)
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return "EMPTY";
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else if (ISNONTERMINAL(lb->lb_type)) {
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if (lb->lb_str == NULL) {
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sprintf(buf, "NT%d", lb->lb_type);
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return buf;
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}
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else
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return lb->lb_str;
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}
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else {
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if (lb->lb_str == NULL)
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return tok_name[lb->lb_type];
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else {
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sprintf(buf, "%.32s(%.32s)",
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tok_name[lb->lb_type], lb->lb_str);
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return buf;
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}
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}
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}
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