symbian-qemu-0.9.1-12/python-2.6.1/Parser/grammar1.c
author martin.trojer@nokia.com
Fri, 31 Jul 2009 15:01:17 +0100
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permissions -rw-r--r--
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/* Grammar subroutines needed by parser */
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#include "Python.h"
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#include "pgenheaders.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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PyGrammar_FindDFA(grammar *g, register int type)
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{
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	register dfa *d;
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#if 1
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	/* Massive speed-up */
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	d = &g->g_dfa[type - NT_OFFSET];
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	assert(d->d_type == type);
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	return d;
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#else
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	/* Old, slow version */
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	register int i;
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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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#endif
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}
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char *
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PyGrammar_LabelRepr(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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			PyOS_snprintf(buf, sizeof(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 _PyParser_TokenNames[lb->lb_type];
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		else {
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			PyOS_snprintf(buf, sizeof(buf), "%.32s(%.32s)",
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				_PyParser_TokenNames[lb->lb_type], lb->lb_str);
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			return buf;
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		}
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	}
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}